:root{--bb-paper:var(--rl-paper);--bb-surface:var(--rl-surface);--bb-surface-2:var(--rl-app-surface-2);--bb-ink:var(--rl-ink);--bb-ink-2:var(--rl-app-ink-2);--bb-ink-3:var(--rl-app-ink-3);--bb-ink-4:var(--rl-app-ink-4);--bb-line:var(--rl-app-line);--bb-line-2:var(--rl-app-line-2);--bb-accent:var(--rl-accent);--bb-accent-2:var(--rl-accent-2);--bb-accent-soft:color-mix(in oklab, var(--bb-accent), transparent 90%);--bb-accent-line:color-mix(in oklab, var(--bb-accent), transparent 78%);--bb-shadow-sm:var(--rl-shadow-sm);--bb-shadow-md:var(--rl-shadow-md);--bb-warn:var(--rl-warn);--bb-warn-soft:var(--rl-warn-soft);--bb-bad:var(--rl-bad);--bb-bad-soft:var(--rl-bad-soft);--bb-ok:var(--rl-ok);--bb-brown-soft:color-mix(in oklab, var(--bb-accent-2), transparent 90%);--bb-brown-line:color-mix(in oklab, var(--bb-accent-2), transparent 78%);--bb-tier-f:var(--rl-ok);--bb-tier-c:var(--rl-warn)}html.dark{--bb-accent-soft:color-mix(in oklab, var(--bb-accent), transparent 86%);--bb-accent-line:color-mix(in oklab, var(--bb-accent), transparent 68%);--bb-brown-soft:color-mix(in oklab, var(--bb-accent-2), transparent 86%);--bb-brown-line:color-mix(in oklab, var(--bb-accent-2), transparent 68%)}.bb-app{background:radial-gradient(1200px 700px at 70% -10%, var(--bb-accent-soft), transparent 60%), var(--bb-paper);min-height:100vh;color:var(--bb-ink);font-family:var(--font-plex-sans), system-ui, sans-serif;font-size:var(--rl-fs-ui);font-feature-settings:"ss01", "ss03";-webkit-font-smoothing:antialiased;line-height:1.45;position:relative}.bb-app:before{content:"";pointer-events:none;mix-blend-mode:multiply;z-index:0;background-image:repeating-linear-gradient(0deg,#16140f05 0 1px,#0000 1px 3px);position:fixed;inset:0}html.dark .bb-app:before{mix-blend-mode:screen;opacity:.35}.bb-app *{box-sizing:border-box}.bb-app button{cursor:pointer;font-family:inherit}.bb-app input{font-family:inherit}.bb-app .mono{font-family:var(--font-plex-mono), ui-monospace, monospace;font-feature-settings:"zero" 1}.bb-app .pages-n{text-align:right;font-variant-numeric:tabular-nums;min-width:3ch;display:inline-block}.bb-app .serif{font-family:var(--font-newsreader), Georgia, serif}.bb-app .topbar{height:56px;padding:0 var(--rl-gutter-x);border-bottom:1px solid var(--bb-line);background:color-mix(in oklab, var(--bb-paper), white 30%);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:57;justify-content:space-between;align-items:center;display:flex;position:sticky;top:0}html.dark .bb-app .topbar{background:color-mix(in oklab, var(--bb-paper), black 20%)}.bb-app .topbar-left{align-items:center;gap:18px;display:flex}.bb-app .topbar-menu-btn{border:1px solid var(--bb-line);background:var(--bb-surface);border-radius:var(--rl-radius-sm);width:32px;height:32px;color:var(--bb-ink-2);place-items:center;display:none}.bb-app .topbar-menu-btn:hover{color:var(--bb-ink);border-color:var(--bb-ink-4)}.bb-app .brand{align-items:center;gap:10px;display:flex}.bb-app .brand-mark{background:var(--bb-ink);width:28px;height:28px;color:var(--bb-paper);border-radius:var(--rl-radius-sm);flex-shrink:0;place-items:center;display:grid;position:relative}.bb-app .brand-mark:after{content:"";border:1px solid color-mix(in oklab, var(--bb-paper), transparent 70%);border-radius:var(--rl-radius-xs);pointer-events:none;position:absolute;inset:2px}.bb-app .brand-mark.plain{background:0 0}.bb-app .brand-mark.plain:after{display:none}.bb-app .brand-mark.tile{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:#fff;width:30px;height:30px}.bb-app .brand-mark.tile:after{display:none}.bb-app .brand-text{line-height:1.1}.bb-app .brand-name{font-weight:600;font-size:var(--rl-fs-13-5);letter-spacing:-.005em}.bb-app .brand-sub{font-size:var(--rl-fs-micro);color:var(--bb-ink-3);letter-spacing:.04em;text-transform:uppercase}.bb-app .crumb{font-size:var(--rl-fs-12-5);color:var(--bb-ink-3);align-items:center;gap:8px;display:flex}.bb-app .crumb-sep{opacity:.5}.bb-app .crumb-current{color:var(--bb-ink);font-weight:500}.bb-app .topbar-right{align-items:center;gap:10px;display:flex}.bb-app .ghost-btn{border:1px solid var(--bb-line);background:var(--bb-surface);border-radius:var(--rl-radius-sm);width:30px;height:30px;color:var(--bb-ink-2);place-items:center;display:grid}.bb-app .ghost-btn:hover{color:var(--bb-ink);border-color:var(--bb-ink-4)}.bb-app .branch-pill{border:1px solid var(--bb-line);font-size:var(--rl-fs-label);background:var(--bb-surface);color:var(--bb-ink-2);border-radius:100px;align-items:center;gap:6px;padding:5px 10px;display:flex}.bb-app .branch-dot{background:var(--bb-ok);border-radius:50%;width:6px;height:6px}.bb-app .user-menu{position:relative}.bb-app .user-chip{border:1px solid var(--bb-line);font-size:var(--rl-fs-12-5);background:var(--bb-surface);color:var(--bb-ink);border-radius:100px;align-items:center;gap:8px;padding:4px 10px 4px 4px;display:flex}.bb-app .user-chip:hover{border-color:var(--bb-ink-4)}.bb-app .avatar{background:var(--bb-ink);width:22px;height:22px;color:var(--bb-paper);border-radius:50%;flex-shrink:0;place-items:center;font-size:10px;font-weight:600;display:grid}.bb-app .user-dropdown{background:var(--bb-surface);border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);min-width:150px;box-shadow:var(--bb-shadow-md);z-index:60;padding:4px;position:absolute;top:calc(100% + 6px);right:0}.bb-app .user-dropdown button{border-radius:var(--rl-radius-sm);width:100%;font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);text-align:left;background:0 0;border:none;align-items:center;gap:8px;padding:8px 10px;display:flex}.bb-app .user-dropdown button:hover{background:var(--bb-surface-2);color:var(--bb-ink)}.bb-app .shell{z-index:1;grid-template-columns:78px 276px 1fr;display:grid;position:relative}.bb-app .shell.shell-home{grid-template-columns:78px 1fr}.bb-app .shell,.bb-app .shell.shell-home{scroll-padding-bottom:var(--rlc-reserve,0px)}.bb-app .main{padding:28px var(--rl-gutter-x) 80px;min-width:0}.bb-app .shell-surface{grid-column:-2/-1;min-width:0}.bb-app .rail1{scrollbar-width:thin;scrollbar-color:var(--bb-line) transparent;border-right:1px solid var(--bb-line);background:color-mix(in oklab, var(--bb-paper), black 4%);z-index:5;flex-direction:column;align-items:center;height:calc(100vh - 57px);padding:16px 12px 24px;display:flex;position:sticky;top:57px;overflow:hidden auto}html.dark .bb-app .rail1{background:color-mix(in oklab, var(--bb-paper), black 16%)}.bb-app .rail2{scrollbar-width:thin;scrollbar-color:var(--bb-line) transparent;border-right:1px solid var(--bb-line);background:color-mix(in oklab, var(--bb-paper), white 14%);height:calc(100vh - 57px);padding:20px 16px;position:sticky;top:57px;overflow-y:auto}html.dark .bb-app .rail2{background:color-mix(in oklab, var(--bb-paper), black 10%)}.bb-app .rail-group+.rail-group{margin-top:20px}.bb-app .rail-section-label{font-size:var(--rl-fs-10-5);letter-spacing:.12em;text-transform:uppercase;color:var(--bb-ink-3);justify-content:space-between;align-items:baseline;gap:8px;margin-bottom:8px;padding:0 8px;display:flex}.bb-app .rail-mini{letter-spacing:.07em;text-transform:uppercase;white-space:nowrap;color:var(--bb-ink-3);font-size:9px;font-weight:500}.bb-app .rail-item{border-radius:var(--rl-radius-md);width:100%;font-size:var(--rl-fs-meta);color:var(--bb-ink-2);text-align:left;background:0 0;border:none;align-items:center;gap:10px;margin-bottom:2px;padding:9px 11px;line-height:16px;display:flex}.bb-app .rail-item:hover:not(:disabled):not(.is-muted){background:var(--bb-surface);color:var(--bb-ink)}.bb-app .rail-item.is-active{background:var(--bb-accent-soft);color:var(--bb-accent);font-weight:600}.bb-app .rail-item.is-active .rail-icon{color:var(--bb-accent)}.bb-app .rail-item.is-active .rail-tag{color:var(--bb-accent);border-color:var(--bb-accent-line)}.bb-app .rail-item.is-muted{color:var(--bb-ink-4);cursor:not-allowed}.bb-app .rail-item.is-dim{opacity:.55}.bb-app .rail-item.is-dim:hover{opacity:1}.bb-app .rail-item.is-light{font-size:var(--rl-fs-12-5);color:var(--bb-ink-3);cursor:default;padding:5px 10px}.bb-app .rail-item.is-light:hover{color:var(--bb-ink-3);background:0 0}.bb-app .rail-icon{flex-shrink:0;justify-content:center;align-items:center;width:14px;height:14px;display:inline-flex}.bb-app .rail-label{white-space:nowrap;text-overflow:ellipsis;flex:auto;min-width:0;overflow:hidden}.bb-app .rail-tag{border:1px solid var(--bb-line);color:var(--bb-ink-3);border-radius:100px;flex-shrink:0;margin-left:auto;padding:1px 6px;font-size:10px;line-height:1.4}.bb-app .rail-sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.bb-app .rail-foot{border:1px dashed var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface);margin-top:32px;padding:14px}.bb-app .rail-foot-title{font-size:var(--rl-fs-label);margin-bottom:4px;font-weight:600}.bb-app .rail-foot-body{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);line-height:1.4}.bb-app .rail-foot-link{color:var(--bb-accent);text-underline-offset:2px;text-decoration:underline}.bb-app .rail-foot-link:hover{color:var(--bb-accent-2)}.bb-app .rail-overlay{z-index:55;opacity:0;pointer-events:none;background:#00000073;background:lab(0% 0 0/.45);transition:opacity .16s;position:fixed;inset:57px 0 0}.bb-app .rail-overlay.is-open{opacity:1;pointer-events:auto}.bb-app .rail-drawer{background:var(--bb-paper);border-right:1px solid var(--bb-line);width:264px;max-width:82vw;box-shadow:var(--bb-shadow-md);z-index:56;padding:18px 14px;transition:transform .2s;display:none;position:fixed;top:57px;bottom:0;left:0;overflow-y:auto;transform:translate(-100%)}html.dark .bb-app .rail-drawer{background:color-mix(in oklab, var(--bb-paper), black 10%)}.bb-app .rail-drawer.is-open{transform:translate(0)}.bb-app .rail-drawer.has-cols{width:316px;max-width:90vw;padding:0;overflow:hidden}.bb-app .rail-drawer-cols{align-items:stretch;height:100%;min-height:0;display:flex}.bb-app .rail-drawer .rail1.rail1-drawer{border-right:1px solid var(--bb-line);flex-direction:column;flex:0 0 72px;align-items:center;width:72px;height:100%;min-height:0;padding:14px 6px 20px;display:flex;position:static;overflow:hidden auto}.bb-app .rail-drawer:not(.has-cols) .rail1.rail1-drawer{background:0 0;border-right:none;flex:auto;align-items:stretch;width:auto;height:auto;padding:0;overflow:visible}.bb-app .rail-drawer:not(.has-cols) .rail1-drawer .rail1-nav{grid-template-columns:repeat(auto-fit,minmax(64px,1fr));gap:16px 8px;width:100%;display:grid}.bb-app .rail-drawer:not(.has-cols) .rail1-drawer .rail1-lbl{max-width:100%}.bb-app .rail-drawer .rail-subject-nav{scrollbar-width:thin;scrollbar-color:var(--bb-line) transparent;flex:auto;min-width:0;height:100%;min-height:0;padding:18px 14px;overflow-y:auto}.bb-app .hero{border-bottom:1px solid var(--bb-line);grid-template-columns:1fr auto;align-items:end;gap:0;padding-bottom:8px;display:grid}.bb-app .hero-eyebrow{font-size:var(--rl-fs-micro);letter-spacing:.12em;text-transform:uppercase;color:var(--bb-ink-3);align-items:center;gap:6px;margin-bottom:14px;display:inline-flex}.bb-app .hero-eyebrow>svg{transform:translateY(-.074em)}.bb-app .hero-title{font-family:var(--font-newsreader), Georgia, serif;letter-spacing:-.022em;color:var(--bb-ink);margin:0 0 12px;font-size:52px;font-weight:400;line-height:1.02}.bb-app .hero-title:last-child{margin-bottom:0}.bb-app .hero-title em{color:var(--bb-accent);font-style:italic;font-weight:300}.bb-app .hero-title-em-lead>em:first-child{margin-left:.058em}.bb-app .hero-sub{font-size:var(--rl-fs-14-5);color:var(--bb-ink-2);text-wrap:pretty;max-width:56ch;margin:0}.bb-app .hero-stats{gap:4px;display:flex}.bb-app .stat{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface);text-align:left;min-width:96px;padding:14px 18px}.bb-app .stat-em{background:var(--bb-ink);color:var(--bb-paper);border-color:var(--bb-ink)}.bb-app .stat-em .stat-l{color:color-mix(in oklab, var(--bb-paper), transparent 30%)}.bb-app .stat-em .stat-n-of{color:color-mix(in oklab, var(--bb-paper), transparent 50%)}.bb-app .stat-n{font-size:var(--rl-fs-h1);letter-spacing:-.02em;margin-bottom:6px;font-weight:500;line-height:1}.bb-app .stat-bad{border-color:color-mix(in oklab, var(--bb-bad), transparent 55%);background:var(--bb-bad-soft)}.bb-app .stat-bad .stat-n{color:var(--bb-bad)}.bb-app .stat-bad .stat-n-of{color:color-mix(in oklab, var(--bb-bad), transparent 35%)}.bb-app .stat-n-of{font-size:var(--rl-fs-ui);color:var(--bb-ink-3);margin-left:1px;font-weight:400}.bb-app .stat-l{font-size:var(--rl-fs-micro);color:var(--bb-ink-3);line-height:1.25}.bb-app .filterbar{grid-template-columns:1fr auto auto;align-items:center;gap:12px;margin-bottom:18px;display:grid}.bb-app .search{background:var(--bb-surface);border:1px solid var(--bb-line);height:36px;color:var(--bb-ink-3);border-radius:7px;align-items:center;gap:8px;padding:0 12px;display:flex}.bb-app .search:focus-within{border-color:var(--bb-ink);color:var(--bb-ink)}.bb-app .search-input{font-size:var(--rl-fs-meta);color:var(--bb-ink);background:0 0;border:none;outline:none;flex:1;min-width:0}.bb-app .search-input::placeholder{color:var(--bb-ink-3)}.bb-app .search-clear{color:var(--bb-ink-3);background:0 0;border:none;padding:4px}.bb-app .search-clear:hover{color:var(--bb-ink)}.bb-app .tier-tabs{background:var(--bb-surface);border:1px solid var(--bb-line);overscroll-behavior-x:contain;scrollbar-width:none;border-radius:7px;max-width:100%;height:36px;padding:3px;display:inline-flex;overflow-x:auto}.bb-app .tier-tabs::-webkit-scrollbar{display:none}.bb-app .tier-tab{height:28px;font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);background:0 0;border:none;border-radius:5px;flex:none;align-items:center;gap:6px;padding:0 12px;display:inline-flex}.bb-app .tier-tab:hover{color:var(--bb-ink)}.bb-app .tier-tab.is-active{background:var(--bb-accent);color:#fff}html.dark .bb-app .tier-tab.is-active{color:var(--bb-paper)}.bb-app .result-count{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);letter-spacing:.03em;white-space:nowrap}.bb-app .bb-grid{grid-template-columns:380px minmax(0,1fr);align-items:start;gap:28px;display:grid}.bb-app .library{flex-direction:column;gap:20px;display:flex}.bb-app .section-head{border-bottom:1px solid var(--bb-line);justify-content:space-between;align-items:flex-end;gap:14px;margin-bottom:8px;padding-bottom:10px;display:flex}.bb-app .section-head-l{align-items:flex-start;gap:14px;min-width:0;display:flex}.bb-app .section-num{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-accent-2);letter-spacing:-.02em;min-width:44px;font-size:40px;font-style:italic;font-weight:300}.bb-app .section-title{font-family:var(--font-newsreader), Georgia, serif;letter-spacing:-.015em;color:var(--bb-ink);margin:0;font-size:22px;font-weight:400}.bb-app .section-blurb{font-size:var(--rl-fs-12-5);color:var(--bb-ink-3);margin-top:2px}.bb-app .section-head-r{flex-shrink:0;align-items:center;gap:14px;display:flex}.bb-app .section-stat{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);font-family:var(--font-plex-mono), monospace;white-space:nowrap}.bb-app .bulk-btn{font-size:var(--rl-fs-11-5);border:1px solid var(--bb-line);color:var(--bb-ink-2);white-space:nowrap;background:0 0;border-radius:100px;padding:5px 10px}.bb-app .bulk-btn:hover{border-color:var(--bb-ink);color:var(--bb-ink)}.bb-app .bulk-btn.is-on{background:var(--bb-ink);color:var(--bb-paper);border-color:var(--bb-ink)}.bb-app .bulk-btn.is-some{border-color:var(--bb-accent);color:var(--bb-accent)}.bb-app .section-rows{grid-template-columns:repeat(auto-fit,minmax(max(420px,50% - 1px),1fr));gap:2px;display:grid}.bb-app .topic{text-align:left;color:var(--bb-ink);cursor:pointer;-webkit-user-select:none;user-select:none;background:0 0;border:1px solid #0000;border-radius:7px;grid-template-columns:22px 40px minmax(8rem,1fr) auto auto;align-items:center;gap:10px;width:100%;padding:11px 14px;transition:background 80ms,border 80ms;display:grid;position:relative}.bb-app .topic:hover{background:var(--bb-surface);border-color:var(--bb-line)}.bb-app .topic.is-selected{background:var(--bb-accent-soft);border-color:var(--bb-accent-line)}.bb-app .topic.is-selected:hover{background:color-mix(in oklab, var(--bb-accent-soft), var(--bb-accent) 5%)}.bb-app .topic-check{border:1.5px solid var(--bb-ink-4);width:18px;height:18px;color:var(--bb-paper);background:var(--bb-surface);border-radius:5px;place-items:center;padding:0;transition:all .1s;display:grid}.bb-app .topic:hover .topic-check{border-color:var(--bb-ink-2)}.bb-app .topic.is-selected .topic-check{background:var(--bb-accent);border-color:var(--bb-accent)}.bb-app .topic-num{font-family:var(--font-plex-mono), monospace;font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);font-feature-settings:"tnum" 1;text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.bb-app .topic.is-selected .topic-num{color:var(--bb-accent);font-weight:500}.bb-app .topic-name{font-size:var(--rl-fs-13-5);color:var(--bb-ink);letter-spacing:-.005em;text-overflow:ellipsis;white-space:nowrap;min-width:0;margin:0;font-weight:500;overflow:hidden}.bb-app .topic-name.has-extra{align-items:center;gap:6px;display:flex}.bb-app .topic-name-text{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.bb-app .topic-view{width:20px;height:20px;color:var(--bb-ink-3);border-radius:5px;flex:none;justify-content:center;align-items:center;transition:color 80ms,background 80ms;display:inline-flex}.bb-app .topic-view:hover{color:var(--bb-accent);background:var(--bb-accent-soft)}.bb-app .topic-pct-cell{justify-content:flex-end;width:46px;display:flex}.bb-app .topic-pages{font-family:var(--font-plex-mono), monospace;font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);align-items:baseline;gap:1px;display:inline-flex}.bb-app .topic-pages-n{color:var(--bb-ink-2);font-weight:500}.bb-app .topic.is-selected .topic-pages-n{color:var(--bb-accent)}.bb-app .pack{flex-direction:column;gap:14px;max-height:calc(100dvh - 96px);display:flex;position:sticky;top:80px;overflow:auto}.bb-app .pack>*{flex:none}.bb-app .pack-box{background:var(--bb-surface);border:1px solid var(--bb-line);box-shadow:var(--bb-shadow-sm);border-radius:10px;padding:16px}.bb-app .pack-cover{background:linear-gradient(135deg, var(--bb-ink) 0%, color-mix(in oklab, var(--bb-ink), var(--bb-accent-2) 18%) 100%);color:var(--bb-paper);border-radius:7px;min-height:96px;padding:14px 16px 16px;display:flex;position:relative;overflow:hidden}.bb-app .pack-cover:after{content:"";pointer-events:none;background-image:repeating-linear-gradient(135deg,#ffffff0a 0 1px,#0000 1px 18px);position:absolute;inset:0}.bb-app .pack-cover-spine{background:var(--bb-accent-2);z-index:1;border-radius:1px;width:4px;margin-right:14px;position:relative}.bb-app .pack-cover-content{z-index:1;flex:1;min-width:0;position:relative}.bb-app .pack-cover-eyebrow{letter-spacing:.16em;text-transform:uppercase;color:color-mix(in oklab, var(--bb-paper), transparent 50%);margin-bottom:10px;font-size:10px}.bb-app .pack-cover-title{font-family:var(--font-newsreader), Georgia, serif;letter-spacing:-.02em;align-items:baseline;gap:10px;font-size:32px;font-weight:400;line-height:1;display:flex}.bb-app .pack-cover-id{font-family:var(--font-plex-mono), monospace;font-size:var(--rl-fs-micro);letter-spacing:.1em;color:color-mix(in oklab, var(--bb-paper), transparent 50%);font-weight:400}.bb-app .pack-cover-meta{font-size:var(--rl-fs-11-5);color:color-mix(in oklab, var(--bb-paper), transparent 30%);flex-wrap:wrap;align-items:center;gap:8px;margin-top:10px;display:flex}.bb-app .pack-cover-meta .dot{opacity:.5;background:currentColor;border-radius:50%;width:3px;height:3px}.bb-app .pack-box.is-stacked{margin-bottom:12px}.bb-app .pack-box>.hero-sub{margin-top:0}.bb-app .pack-box>.hero-sub~.hero-sub{margin-top:8px}.bb-app .pack-section-head{font-size:var(--rl-fs-micro);letter-spacing:.12em;text-transform:uppercase;color:var(--bb-ink-3);justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.bb-app .link-btn{font-size:var(--rl-fs-micro);color:var(--bb-ink-3);letter-spacing:.04em;text-transform:none;background:0 0;border:none;padding:0}.bb-app .link-btn:hover{color:var(--bb-accent)}.bb-app .field-grid{grid-template-columns:1fr;gap:8px;display:grid}.bb-app .field{flex-direction:column;gap:4px;display:flex}.bb-app .field-label{font-size:var(--rl-fs-form-label);color:var(--bb-ink-3);align-items:center;gap:8px;display:flex}.bb-app .field-label em{color:var(--bb-ink-3);font-style:normal;font-size:var(--rl-fs-10-5)}.bb-app .field-req{letter-spacing:.08em;text-transform:uppercase;color:var(--bb-accent);background:color-mix(in oklab, var(--bb-accent), transparent 88%);border:1px solid color-mix(in oklab, var(--bb-accent), transparent 70%);border-radius:var(--rl-radius-pill);padding:1px 6px;font-size:9.5px;font-weight:600;line-height:1.5}.bb-app .field-opt{letter-spacing:.08em;text-transform:uppercase;color:var(--bb-ink-3);background:var(--bb-surface-2);border:1px solid var(--bb-line);border-radius:var(--rl-radius-pill);padding:1px 6px;font-size:9.5px;font-weight:600;line-height:1.5}.bb-app .field-input{background:var(--bb-surface-2);border:1px solid var(--bb-line);border-radius:var(--rl-radius-sm);height:34px;font-size:var(--rl-fs-meta);color:var(--bb-ink);outline:none;width:100%;padding:0 10px;transition:border .1s,background .1s}.bb-app .field-input:focus{border-color:var(--bb-ink);background:var(--bb-surface)}.bb-app .field-input.is-bad{border-color:var(--bb-bad);background:var(--bb-bad-soft)}.bb-app .field-input.mono{font-family:var(--font-plex-mono), monospace;letter-spacing:.05em}.bb-app .field-input::placeholder{color:var(--bb-ink-4)}.bb-app .pack-option{cursor:pointer;border-radius:var(--rl-radius-sm);grid-template-columns:18px 1fr auto;align-items:center;gap:10px;padding:7px 4px;display:grid}.bb-app .pack-option:hover{background:var(--bb-surface-2)}.bb-app .pack-option+.pack-option{border-top:1px solid var(--bb-line-2)}.bb-app .pack-option-check{appearance:none;border:1.5px solid var(--bb-ink-4);background:var(--bb-surface);cursor:pointer;border-radius:5px;place-items:center;width:18px;height:18px;margin:0;transition:background .1s,border-color .1s;display:grid}.bb-app .pack-option:hover .pack-option-check{border-color:var(--bb-ink-2)}.bb-app .pack-option-check:checked{background:var(--bb-accent);border-color:var(--bb-accent)}.bb-app .pack-option-check:checked:after{content:"";border:solid var(--bb-paper);border-width:0 2px 2px 0;width:4px;height:8px;transform:translateY(-1px)rotate(45deg)}.bb-app .pack-option-text{flex-direction:column;gap:1px;min-width:0;display:flex}.bb-app .pack-option-title{font-size:var(--rl-fs-meta);color:var(--bb-ink);font-weight:500}.bb-app .pack-option-sub{font-size:var(--rl-fs-micro);color:var(--bb-ink-3)}.bb-app .pack-option-pages{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3)}.bb-app .pack-option:has(.pack-option-check:not(:checked)) .pack-option-pages{color:var(--bb-ink-3)}.bb-app .pack-toc{min-height:100px}.bb-app .toc{flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.bb-app .toc-item{border-bottom:1px dashed var(--bb-line);font-size:var(--rl-fs-12-5);color:var(--bb-ink);cursor:grab;grid-template-columns:14px auto 1fr auto auto auto;align-items:center;gap:8px;padding:7px 0;line-height:18px;display:grid}.bb-app .toc-item:last-child{border-bottom:none}.bb-app .toc-item.no-handle{cursor:default;grid-template-columns:auto 1fr auto auto auto}.bb-app .toc-item.is-dragging{opacity:.5}.bb-app .toc-item:hover .toc-handle{color:var(--bb-ink-2)}.bb-app .toc-handle{color:var(--bb-ink-4);align-self:center;display:inline-flex}.bb-app .toc-id,.bb-app .toc-pages{position:relative;top:1px}.bb-app .toc-id{font-family:var(--font-plex-mono), monospace;font-size:var(--rl-fs-micro);color:var(--bb-accent);font-weight:500}.bb-app .toc-name{text-overflow:ellipsis;white-space:nowrap;font-weight:500;overflow:hidden}.bb-app .toc-dots{border-bottom:1px dotted var(--bb-ink-4);flex:1;align-self:center;min-width:8px;height:0;margin:0 4px;position:relative;top:-2px}.bb-app .toc-pages{font-size:var(--rl-fs-micro);color:var(--bb-ink-2);font-weight:500}.bb-app .toc-remove{color:var(--bb-ink-4);border-radius:var(--rl-radius-xs);background:0 0;border:none;place-items:center;padding:4px;display:grid}.bb-app .toc-remove:hover{color:var(--bb-bad);background:var(--bb-bad-soft)}.bb-app .toc-empty{text-align:center;border:1px dashed var(--bb-line);background:var(--bb-surface-2);border-radius:7px;padding:22px 12px 18px}.bb-app .toc-empty-icon{color:var(--bb-ink-4);margin-bottom:8px;display:inline-flex}.bb-app .toc-empty-title{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);margin-bottom:2px;font-size:16px}.bb-app .toc-empty-body{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3)}.bb-app .meter{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface-2);padding:12px 14px}.bb-app .meter-head{justify-content:space-between;align-items:baseline;margin-bottom:8px;display:flex}.bb-app .meter-label{font-size:var(--rl-fs-micro);letter-spacing:.1em;text-transform:uppercase;color:var(--bb-ink-3)}.bb-app .meter-count{font-family:var(--font-plex-mono), monospace;align-items:baseline;gap:2px;display:inline-flex}.bb-app .meter-used{font-size:var(--rl-fs-h4);color:var(--bb-ink);font-weight:600}.bb-app .meter-slash{color:var(--bb-ink-3);margin:0 2px}.bb-app .meter-max{font-size:var(--rl-fs-meta);color:var(--bb-ink-3)}.bb-app .meter-unit{font-size:var(--rl-fs-10-5);color:var(--bb-ink-3);margin-left:4px}.bb-app .meter-track{background:var(--bb-line-2);border-radius:100px;height:6px;position:relative;overflow:hidden}.bb-app .meter-fill{background:var(--bb-ink);border-radius:100px;height:100%;transition:width .2s,background .2s}.bb-app .meter-warn .meter-fill{background:var(--bb-warn)}.bb-app .meter-over .meter-fill{background:var(--bb-bad)}.bb-app .meter-tick{background:var(--bb-ink-4);width:1px;height:10px;position:absolute;top:-2px}.bb-app .meter-parts{font-size:var(--rl-fs-10-5);color:var(--bb-ink-3);margin:-4px 0 8px}.bb-app .meter-foot{font-size:var(--rl-fs-micro);color:var(--bb-ink-3);margin-top:8px}.bb-app .meter-trim{margin-left:8px}.bb-app .meter-warn .meter-msg{color:var(--bb-warn);font-weight:500}.bb-app .meter-over .meter-msg{color:var(--bb-bad);font-weight:600}.bb-app .meter-msg svg{vertical-align:-2px;margin-right:2px}.bb-app .meter-msg-dim{color:var(--bb-ink-3)}.bb-app .toc-confirm{font-size:var(--rl-fs-micro);color:var(--bb-ink-3);align-items:center;gap:8px;display:inline-flex}.bb-app .toc-undo{border:1px dashed var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface-2);font-size:var(--rl-fs-11-5);color:var(--bb-ink-2);justify-content:space-between;align-items:center;gap:10px;padding:8px 12px;display:flex}.bb-app .toc-undo-text{text-overflow:ellipsis;min-width:0;overflow:hidden}.bb-app .link-btn.is-bad{color:var(--bb-bad)}.bb-app .pack-foot{bottom:var(--rlc-reserve,0px);background:var(--bb-paper);border-top:1px solid var(--bb-line-2);z-index:2;flex-direction:column;gap:10px;margin-top:-4px;padding-top:10px;display:flex;position:sticky}@media (min-width:1181px){.bb-app .pack{max-height:calc(100vh - 80px - var(--rlc-reserve,0px) - var(--pack-foot-h,130px))}.bb-app .pack-foot{left:var(--pack-left,386px);width:var(--pack-width,380px);position:fixed;box-shadow:0 -1px #16140f0a,0 -6px 18px -8px #16140f2e}html.dark .bb-app .pack-foot{box-shadow:0 -1px #0006,0 -6px 20px -8px #0009}}.bb-app .generate{background:var(--bb-accent);color:#fff;border-radius:var(--rl-radius-md);height:46px;font-size:var(--rl-fs-ui);letter-spacing:-.005em;box-shadow:0 1px 0 #fff3 inset, 0 6px 16px -8px var(--bb-accent);border:none;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;padding:0 16px;font-weight:600;transition:transform 80ms,filter .1s;display:grid}html.dark .bb-app .generate{color:var(--bb-paper)}.bb-app .generate.is-ready:hover{filter:brightness(1.05)}.bb-app .generate.is-ready:active{transform:translateY(1px)}.bb-app .generate.is-disabled{background:var(--bb-surface-2);color:var(--bb-ink-4);cursor:not-allowed;box-shadow:none;border:1px solid var(--bb-line)}.bb-app .generate-icon{display:inline-flex}.bb-app .generate-label{text-align:left}.bb-app .generate-meta{font-size:var(--rl-fs-label);opacity:.75;font-weight:500}.bb-app .generate-hint{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);text-align:center;margin-top:-8px}.bb-app .spinner{border:2px solid;border-top-color:#0000;border-radius:50%;width:16px;height:16px;animation:.7s linear infinite bb-spin}@keyframes bb-spin{to{transform:rotate(360deg)}}.bb-app .bb-state{text-align:center;min-height:60vh;color:var(--bb-ink-2);flex-direction:column;justify-content:center;align-items:center;gap:14px;display:flex}.bb-app .bb-state .spinner{width:28px;height:28px;color:var(--bb-accent)}.bb-app .bb-modal-overlay{z-index:100;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#16140f73;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.bb-app .bb-modal{background:var(--bb-surface);border:1px solid var(--bb-line);border-radius:var(--rl-radius-lg);width:100%;max-width:420px;box-shadow:var(--bb-shadow-md);text-align:left;padding:22px;position:relative}.bb-app .bb-modal-title{font-family:var(--font-newsreader), Georgia, serif;font-size:var(--rl-fs-h3);color:var(--bb-ink);margin:0 0 8px}.bb-app .bb-modal-body{font-size:var(--rl-fs-meta);color:var(--bb-ink-2);white-space:pre-wrap;word-break:break-word;margin:0 0 18px}.bb-app .bb-modal-btn{width:100%;height:var(--rl-btn-md-height);border-radius:var(--rl-btn-md-radius);background:var(--bb-accent);color:#fff;font-size:var(--rl-fs-meta);font-weight:var(--rl-btn-md-weight);border:none}html.dark .bb-app .bb-modal-btn{color:var(--bb-paper)}.bb-app .bb-modal-btn:hover{filter:brightness(1.05)}.bb-app .bb-modal-btn-secondary{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface);width:100%;height:40px;color:var(--bb-ink-2);font-size:var(--rl-fs-meta);margin-top:8px;font-weight:600}.bb-app .bb-modal-btn-secondary:hover{border-color:var(--bb-accent-line);color:var(--bb-accent)}@media (max-width:1180px){.bb-app .bb-grid{grid-template-columns:1fr}.bb-app .pack{order:2;max-height:none;position:static}.bb-app .library{order:1}.bb-app .section-rows{grid-template-columns:1fr}}@media (max-width:900px){.bb-app .shell,.bb-app .shell.shell-home{grid-template-columns:1fr}.bb-app .rail1,.bb-app .rail2{display:none}.bb-app .topbar-menu-btn{display:grid}.bb-app .rail-drawer{display:block}}@media (max-width:640px){.bb-app .main{padding:8px 8px 80px}.bb-app .topbar{padding:0 8px}.bb-app .topbar-left{gap:6px}}@media (max-width:880px){.bb-app .hero{grid-template-columns:1fr;gap:14px}.bb-app .hero-stats{flex-wrap:wrap}.bb-app .hero-title{font-size:36px}.bb-app .filterbar{grid-template-columns:1fr}.bb-app .crumb{display:none}}.bb-app .pp-filterbar{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:18px;display:flex}.bb-app .pp-filterbar .search{flex:200px;min-width:160px}.bb-app .pp-filtergroup{flex-wrap:wrap;align-items:center;gap:7px;display:flex}.bb-app .pp-filtergroup+.pp-filtergroup{border-left:1px solid var(--bb-line);padding-left:12px}.bb-app .ppp-custom-n{border:1px solid var(--bb-line);background:var(--bb-surface);width:72px;color:var(--bb-ink);font-family:var(--font-plex-mono), ui-monospace, monospace;font-size:var(--rl-fs-label);border-radius:7px;flex:0 0 72px;padding:7px 9px}.bb-app .ppp-custom-n:focus{border-color:var(--bb-accent-line);outline:none}.bb-app .pp-filtergroup>span{letter-spacing:.12em;text-transform:uppercase;color:var(--bb-ink-3);font-size:10px}.bb-app .pp-filtergroup .tier-tabs,.bb-app .pp-source-switch .tier-tabs{flex:none}.bb-app .pp-badges{flex-wrap:wrap;align-items:center;gap:5px;display:inline-flex}.bb-app .pp-links{flex-wrap:wrap;gap:6px;margin-bottom:12px;display:flex}.bb-app .pp-back{color:var(--bb-ink-3);font-size:var(--rl-fs-label);background:0 0;border:none;align-items:center;gap:6px;margin-bottom:14px;display:inline-flex}.bb-app .pp-back:hover{color:var(--bb-accent)}.bb-app .pp-detail-head{border:1px solid var(--bb-line);background:var(--bb-surface);box-shadow:var(--bb-shadow-sm);border-radius:9px;margin-bottom:20px;padding:16px 18px}.bb-app .pp-detail-title{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);letter-spacing:-.015em;margin:9px 0 4px;font-size:26px}.bb-app .pp-detail-meta{font-size:var(--rl-fs-12-5);color:var(--bb-ink-3);margin-bottom:12px}.bb-app .pp-qgrid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px;display:grid}.bb-app .pp-q{border:1px solid var(--bb-line);background:var(--bb-surface);text-align:left;box-shadow:var(--bb-shadow-sm);border-radius:9px;padding:0;transition:border-color 80ms,box-shadow 80ms;overflow:hidden}.bb-app .pp-q:hover{border-color:var(--bb-accent-line);box-shadow:var(--bb-shadow-md)}.bb-app .pp-q-head{border-bottom:1px solid var(--bb-line-2);justify-content:space-between;align-items:center;padding:8px 12px;display:flex}.bb-app .pp-q-num{font-family:var(--font-newsreader), Georgia, serif;font-size:var(--rl-fs-body);color:var(--bb-ink)}.bb-app .pp-q-img{-o-object-fit:cover;object-fit:cover;-o-object-position:top;object-position:top;background:#fff;width:100%;max-height:300px;display:block}.bb-app .pp-q-answer{border-top:1px solid var(--bb-line-2);background:var(--bb-accent-soft);align-items:baseline;gap:8px;padding:8px 12px;display:flex}.bb-app .pp-q-answer-label{letter-spacing:.06em;text-transform:uppercase;color:var(--bb-accent);flex:none;font-size:9.5px;font-weight:700}.bb-app .pp-q-answer-val{font-size:var(--rl-fs-12-5);color:var(--bb-ink);word-break:break-word}.bb-app .pp-empty{text-align:center;color:var(--bb-ink-3);padding:48px 0}.bb-app .pp-state{text-align:center;color:var(--bb-ink-3);padding:90px 20px}.bb-app .pp-q-topics{flex-wrap:wrap;gap:4px;padding:8px 10px 0;display:flex}.bb-app .pp-q-open{color:var(--bb-ink);font-family:var(--font-newsreader), Georgia, serif;font-size:var(--rl-fs-body);text-align:left;background:0 0;border:none;padding:0}.bb-app .pp-q-open:hover{color:var(--bb-accent)}.bb-app .pp-q .pp-q-img{cursor:zoom-in}.bb-app .pp-select{border:1px solid var(--bb-line);background:var(--bb-surface);height:34px;color:var(--bb-ink);font-size:var(--rl-fs-label);border-radius:7px;max-width:260px;padding:0 8px}.bb-app .pp-topic-head{border-bottom:1px solid var(--bb-line);justify-content:space-between;align-items:center;gap:14px;margin-bottom:14px;padding-bottom:10px;display:flex}.bb-app .topic-pct-cell.is-fh{gap:4px;width:auto}.bb-app .topic.pp-pick{grid-template-columns:22px 40px minmax(8rem,1fr) auto auto auto}.bb-app .topic.pp-pick .topic-pct-cell{gap:5px;width:auto}.bb-app .pp-mark-cell{justify-content:flex-end;display:flex}.bb-app .topic.pp-pick .pp-mark-cell,.bb-app .topic.pp-pick .topic-pct-cell,.bb-app .topic.pp-pick .topic-pages{white-space:nowrap}.bb-app .toc-item.pp-toc-item{grid-template-columns:auto minmax(0,max-content) minmax(8px,1fr) auto auto auto auto}.bb-app .pp-toc-item .toc-pick,.bb-app .pp-toc-item .toc-expand,.bb-app .pp-toc-item .toc-remove{width:32px;height:32px;padding:0}.bb-app .pp-attribution{border-top:1px solid var(--bb-line);font-size:var(--rl-fs-label);color:var(--bb-ink-3);text-align:center;margin-top:40px;padding-top:16px;line-height:1.5}.bb-app .pp-attribution a{color:var(--bb-accent);text-decoration:none}.bb-app .pp-attribution a:hover{text-decoration:underline}.bb-app .pp-randomise{cursor:pointer}.bb-app.bb-login{justify-content:center;align-items:center;padding:24px;display:flex}.bb-login-shell{z-index:1;flex-direction:column;align-items:center;gap:18px;width:100%;max-width:380px;display:flex;position:relative}.bb-login-brand{gap:11px}.bb-login-card{width:100%;padding:30px 28px 28px}.bb-login-title{letter-spacing:-.02em;color:var(--bb-ink);margin:0 0 4px;font-size:32px;font-weight:400}.bb-login-title em{color:var(--bb-accent);font-style:italic}.bb-login-sub{font-size:var(--rl-fs-meta);color:var(--bb-ink-3);margin:0 0 22px}.bb-login-error{font-size:var(--rl-fs-12-5);color:var(--bb-bad);background:var(--bb-bad-soft);border:1px solid color-mix(in oklab, var(--bb-bad), transparent 60%);border-radius:7px;margin-bottom:16px;padding:9px 12px}.bb-login-form{gap:14px}.bb-login-form .field-input{height:40px;font-size:var(--rl-fs-13-5)}.bb-login-btn{height:var(--rl-btn-lg-height);background:var(--bb-accent);color:#fff;border-radius:var(--rl-btn-lg-radius);width:100%;font-size:var(--rl-fs-ui);letter-spacing:-.005em;box-shadow:0 1px 0 #fff3 inset, 0 6px 16px -8px var(--bb-accent);border:none;justify-content:center;align-items:center;gap:8px;margin-top:4px;font-weight:600;transition:transform 80ms,filter .1s;display:inline-flex}html.dark .bb-login-btn{color:var(--bb-paper)}.bb-login-btn:hover:not(:disabled){filter:brightness(1.05)}.bb-login-btn:active:not(:disabled){transform:translateY(1px)}.bb-login-btn:disabled{background:var(--bb-surface-2);color:var(--bb-ink-4);box-shadow:none;border:1px solid var(--bb-line);cursor:not-allowed}.bb-login-foot{font-size:var(--rl-fs-micro);color:var(--bb-ink-3);letter-spacing:.08em;text-transform:uppercase}.bb-app .as-panel{border:1px solid var(--bb-line);border-radius:var(--rl-radius-lg);background:var(--bb-surface);max-width:640px;box-shadow:var(--bb-shadow-sm);padding:20px 22px}.bb-app .as-textarea{resize:vertical;height:auto;min-height:78px;padding:9px 12px;font-family:inherit;line-height:1.5}.bb-app .as-submit{justify-self:start;width:auto;height:42px;margin-top:8px;padding:0 20px}.bb-app .as-results{border:1px dashed var(--bb-line);border-radius:var(--rl-radius-lg);background:var(--bb-surface);max-width:640px;margin-top:20px;padding:18px 20px}.bb-app .as-results-head{font-size:var(--rl-fs-10-5);letter-spacing:.12em;text-transform:uppercase;color:var(--bb-ink-3);margin-bottom:8px}.bb-app .as-results-note{font-size:var(--rl-fs-meta);color:var(--bb-ink-2);margin:0 0 14px;line-height:1.5}.bb-app .as-results-list{gap:9px;margin:0;padding:0;list-style:none;display:grid}.bb-app .as-results-list li{font-size:var(--rl-fs-meta);color:var(--bb-ink);gap:12px;display:flex}.bb-app .as-results-label{color:var(--bb-ink-3);font-size:var(--rl-fs-micro);letter-spacing:.04em;text-transform:uppercase;flex:0 0 84px;padding-top:1px}.rlc-root{z-index:120;width:min(560px,100vw - 32px);font-family:var(--font-plex-sans), system-ui, sans-serif;position:fixed;bottom:22px;left:50%;transform:translate(-50%)}.rlc-card{border-radius:var(--rl-radius-lg);border:1px solid var(--bb-line);background:color-mix(in oklab, var(--bb-surface), var(--bb-paper) 40%);padding:16px 18px 15px;animation:.32s both rlc-rise;position:relative;overflow:hidden;box-shadow:0 20px 44px -18px #16140f6b,inset 0 1px #ffffff0d}.rlc-card:before{content:"";background:var(--bb-accent-2);width:5px;position:absolute;top:0;bottom:0;left:0}@keyframes rlc-rise{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.rlc-header{align-items:flex-start;gap:12px;display:flex}.rlc-icon{width:34px;height:34px;color:var(--bb-accent-2);background:color-mix(in oklab, var(--bb-accent-2), transparent 88%);border-radius:9px;flex:0 0 34px;place-items:center;display:grid}.rlc-title{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);margin:1px 0 3px;font-size:16px;font-weight:500}.rlc-body{color:var(--bb-ink-2);margin:0;font-size:12.8px;line-height:1.5}.rlc-link{font:inherit;cursor:pointer;color:var(--bb-accent);text-underline-offset:2px;background:0 0;border:0;padding:0;text-decoration:underline}.rlc-link:hover{color:var(--bb-accent-2)}.rlc-link:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px;border-radius:2px}.rlc-prefs{border:1px solid var(--bb-line);background:var(--bb-surface-2);border-radius:9px;margin-top:12px;padding:2px 12px}.rlc-row{align-items:flex-start;gap:12px;padding:11px 0;display:flex}.rlc-row+.rlc-row{border-top:1px solid var(--bb-line-2)}.rlc-row-name{font-size:var(--rl-fs-12-5);color:var(--bb-ink);align-items:center;gap:8px;font-weight:600;display:flex}.rlc-eyebrow{text-transform:uppercase;letter-spacing:.06em;color:var(--bb-ink-3);font-size:10px;font-weight:600}.rlc-row-desc{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);margin:2px 0 0}.rlc-toggle{border-radius:var(--rl-radius-pill);cursor:pointer;background:var(--bb-line-2);border:0;flex:0 0 32px;width:32px;height:18px;margin-top:1px;padding:0;transition:background .14s;position:relative}.rlc-toggle:not(:disabled):before{content:"";position:absolute;inset:-13px}.rlc-toggle:after{content:"";background:#fff;border-radius:50%;width:14px;height:14px;transition:transform .14s;position:absolute;top:2px;left:2px;box-shadow:0 1px 2px #00000040}.rlc-toggle[aria-checked=true]{background:var(--bb-accent)}.rlc-toggle[aria-checked=true]:after{transform:translate(14px)}.rlc-toggle:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.rlc-toggle:disabled{cursor:default;opacity:.7;background:color-mix(in oklab, var(--bb-accent), var(--bb-ink-4) 55%)}.rlc-actions{gap:8px;margin-top:14px;display:flex}.rlc-btn{height:var(--rl-btn-sm-height);padding:0 var(--rl-btn-sm-pad-x);border-radius:var(--rl-btn-sm-radius);font-size:var(--rl-btn-sm-fs);font-weight:var(--rl-btn-sm-weight);cursor:pointer;transition:background .14s,border-color .14s}.rlc-btn-primary{border:1px solid var(--bb-accent);background:var(--bb-accent);color:#fff;flex:1}html.dark .rlc-btn-primary{color:var(--bb-paper)}.rlc-btn-primary:hover{background:color-mix(in oklab, var(--bb-accent), black 8%)}.rlc-btn-ghost{border:1px solid var(--bb-line);background:var(--bb-surface);color:var(--bb-ink-2)}.rlc-btn-ghost:hover{border-color:var(--bb-ink-3)}.rlc-btn:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.rlc-root:focus-visible{outline:2px solid var(--bb-accent);outline-offset:3px;border-radius:var(--rl-radius-lg)}.rlc-reopen-btn{min-height:44px}@media (max-width:560px){.rlc-root{bottom:12px}}.ppx{background:var(--bb-paper);min-height:100vh;color:var(--bb-ink);font-family:var(--font-plex-sans), system-ui, sans-serif;font-size:var(--rl-fs-ui)}.ppx .mono{font-family:var(--font-plex-mono), ui-monospace, monospace}.ppx-toolbar{z-index:10;padding:10px var(--rl-gutter-x);background:var(--bb-surface);border-bottom:1px solid var(--bb-line);align-items:center;gap:14px;display:flex;position:sticky;top:0}.ppx-back{font-size:var(--rl-fs-12-5);color:var(--bb-ink-3);border-radius:var(--rl-radius-sm);border:1px solid var(--bb-line);align-items:center;gap:6px;padding:6px 10px;display:inline-flex}.ppx-back:hover{color:var(--bb-ink);border-color:var(--bb-ink-4)}.ppx-toolbar-title{font-size:var(--rl-fs-micro);letter-spacing:.08em;text-transform:uppercase;color:var(--bb-ink-3)}.ppx-print{font-size:var(--rl-fs-meta);color:#fff;background:var(--bb-accent);cursor:pointer;border:none;border-radius:7px;align-items:center;gap:7px;margin-left:auto;padding:8px 14px;font-weight:600;display:inline-flex}html.dark .ppx-print{color:#10150d}.ppx-print:disabled{opacity:.5;cursor:default}.ppx-print:not(:disabled):hover{filter:brightness(1.08)}.ppx-state{color:var(--bb-ink-3);flex-direction:column;align-items:center;gap:12px;padding:80px 20px;display:flex}.ppx-sheet{max-width:820px;padding:34px var(--rl-gutter-x) 48px;margin:0 auto}.ppx-head{margin-bottom:26px}.ppx-eyebrow{font-size:var(--rl-fs-10-5);letter-spacing:.16em;text-transform:uppercase;color:var(--bb-accent-2);font-weight:600}.ppx-title{font-family:var(--font-newsreader), Georgia, serif;margin:10px 0 8px;font-size:30px;font-weight:500;line-height:1.15}.ppx-id{color:var(--bb-accent);margin-right:4px;font-size:22px}.ppx-meta{font-size:var(--rl-fs-label);color:var(--bb-ink-3)}.ppx-list{flex-direction:column;gap:22px;margin:0;padding:0;list-style:none;display:flex}.ppx-q{background:var(--bb-surface);border:1px solid var(--bb-line);-moz-column-break-inside:avoid;break-inside:avoid;border-radius:10px;padding:14px 16px 16px}.ppx-q-cap{border-bottom:1px solid var(--bb-line-2);align-items:baseline;gap:10px;margin-bottom:12px;padding-bottom:10px;display:flex}.ppx-q-n{font-weight:600;font-size:var(--rl-fs-label);color:var(--bb-accent)}.ppx-q-src{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2)}.ppx-q-marks{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);margin-left:auto}.ppx-q-img{border-radius:var(--rl-radius-xs);background:#fff;width:100%;height:auto;display:block}html.dark .ppx-q-img{border:1px solid var(--bb-line)}.ppx-attrib{border-top:1px solid var(--bb-line);font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);margin-top:30px;padding-top:14px;line-height:1.55}@media print{.ppx{color:#000;background:#fff}.ppx-toolbar{display:none}.ppx-sheet{max-width:none;padding:0}.ppx-q{page-break-inside:avoid;border:none;border-radius:0;padding:0 0 6px}.ppx-q-img{border:none}.ppx-attrib{color:#444}}.bb-app .toc-expand{color:var(--bb-ink-4);border-radius:var(--rl-radius-xs);background:0 0;border:none;place-items:center;padding:4px;display:grid}.bb-app .toc-expand:hover{color:var(--bb-accent);background:var(--bb-accent-soft)}.bb-app .tf-filterbar{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:18px;display:flex}.bb-app .tf-filterbar .search{flex:220px;min-width:180px}.bb-app .tf-frequent-toggle{border:1px solid var(--bb-line);background:var(--bb-surface);height:36px;color:var(--bb-ink-2);font-size:var(--rl-fs-12-5);white-space:nowrap;border-radius:7px;align-items:center;gap:6px;padding:0 12px;display:inline-flex}.bb-app .tf-frequent-toggle input{accent-color:var(--bb-accent)}.bb-app .tf-table-wrap{border:1px solid var(--bb-line);background:var(--bb-surface);border-radius:10px;overflow-x:auto}.bb-app .tf-table{min-width:680px}.bb-app .tf-row{border-bottom:1px solid var(--bb-line-2);grid-template-columns:64px 1fr 130px 96px 96px 96px;align-items:center;gap:10px;padding:10px 14px;display:grid}.bb-app .tf-table.tf-cols-gcse .tf-row{grid-template-columns:64px 1fr 130px 96px 96px}.bb-app .tf-table.tf-cols-alevel .tf-row{grid-template-columns:64px 1fr 130px 96px}.bb-app .tf-table.tf-cols-gcse,.bb-app .tf-table.tf-cols-alevel{min-width:560px}.bb-app .tf-table.tf-cols-auto{min-width:480px}.bb-app .tf-table.tf-cols-auto .tf-row{grid-template-columns:64px minmax(220px, 1fr) repeat(var(--tf-pct-cols,1), 110px)}.bb-app .tf-footnote{font-size:var(--rl-fs-12-5);color:var(--bb-ink-3);margin:10px 2px 0}.bb-app .tf-note{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);background:var(--bb-surface);border:1px solid var(--bb-line);border-radius:9px;margin:0 0 12px;padding:9px 13px}.bb-app .tf-row:last-child{border-bottom:none}.bb-app .tf-row.tf-head{background:var(--bb-surface-2);border-bottom:1px solid var(--bb-line);z-index:1;position:sticky;top:0}.bb-app .tf-th{font-size:var(--rl-fs-micro);text-transform:uppercase;letter-spacing:.04em;color:var(--bb-ink-3);cursor:pointer;text-align:left;background:0 0;border:none;align-items:center;gap:4px;padding:0;font-weight:600;display:inline-flex}.bb-app .tf-th:hover{color:var(--bb-ink)}.bb-app .tf-th.is-active{color:var(--bb-accent)}.bb-app .tf-th-r{text-align:right;justify-content:flex-end}.bb-app .tf-th-static{cursor:default}.bb-app .tf-th-static:hover{color:var(--bb-ink-3)}.bb-app .tf-th-arrow{font-size:10px}.bb-app .tf-cell{min-width:0}.bb-app .tf-id{font-size:var(--rl-fs-label);color:var(--bb-ink-2)}.bb-app .tf-title{font-size:var(--rl-fs-meta);color:var(--bb-ink);align-items:center;gap:8px;min-width:0;font-weight:500;display:flex}.bb-app .tf-group{font-size:var(--rl-fs-label);color:var(--bb-ink-3)}.bb-app .tf-r{justify-content:flex-end;display:flex}.bb-app .tf-badge{text-transform:uppercase;letter-spacing:.02em;border-radius:var(--rl-radius-pill);color:var(--bb-ok);background:color-mix(in oklab, var(--bb-ok), transparent 88%);border:1px solid color-mix(in oklab, var(--bb-ok), transparent 74%);flex-shrink:0;padding:2px 7px;font-size:10px;font-weight:600}.bb-app .tf-pct-cell{justify-content:flex-end;width:100%;display:flex}.bb-app .tf-pct-empty{color:var(--bb-ink-3);font-size:var(--rl-fs-label)}.bb-app .tf-empty{text-align:center;color:var(--bb-ink-3);font-size:var(--rl-fs-meta);padding:40px 14px}@media (max-width:720px){.bb-app .tf-filterbar{align-items:stretch}.bb-app .tf-filterbar .tier-tabs{order:3}}.bb-app .kt-section{border:1px dashed var(--bb-accent-line);border-radius:var(--rl-radius-lg);background:var(--bb-accent-soft);gap:12px;margin-bottom:20px;padding:18px 20px;display:grid}.bb-app .kt-heading{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);margin:0;font-size:19px;font-weight:600}.bb-app .kt-lead{font-size:var(--rl-fs-meta);color:var(--bb-ink-2);max-width:62ch;margin:0;line-height:1.6}.bb-app .kt-list{gap:6px;margin:0;padding:0;list-style:none;display:grid}.bb-app .kt-item{background:var(--bb-surface);border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);justify-content:space-between;align-items:center;gap:12px;padding:8px 12px;display:flex}.bb-app .kt-item-topic{min-width:0;font-size:var(--rl-fs-meta);align-items:baseline;gap:8px;display:flex}.bb-app .kt-item-id{color:var(--bb-ink-3);font-size:var(--rl-fs-label);flex-shrink:0}.bb-app .kt-item-title{color:var(--bb-ink);font-weight:500}.bb-app .kt-footnote{font-size:var(--rl-fs-label);color:var(--bb-ink-3);margin:0}.bb-app .kt-btn{max-width:280px;text-decoration:none}.bb-app .dx-draft-note{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);background:var(--bb-surface);border:1px dashed var(--bb-line);border-radius:var(--rl-radius-md);max-width:78ch;margin:0 0 14px;padding:8px 12px;line-height:1.5}.bb-app .dx-intro-strands{-moz-column-gap:12px;grid-template-columns:fit-content(26ch) minmax(0,1fr) max-content;gap:8px 12px;margin:0 0 20px;padding:0;list-style:none;display:grid}.bb-app .dx-intro-strand{-moz-column-gap:12px;border:1px solid var(--bb-line);background:var(--bb-surface);border-radius:10px;grid-column:1/-1;grid-template-columns:14rem minmax(0,1fr) max-content;align-items:baseline;gap:4px 12px;padding:12px 14px;display:grid}@supports (grid-template-columns:subgrid){.bb-app .dx-intro-strand{grid-template-columns:subgrid}}.bb-app .dx-intro-strand-title{font-weight:600;font-size:var(--rl-fs-13-5);color:var(--bb-ink)}.bb-app .dx-intro-strand-blurb{font-size:var(--rl-fs-label);color:var(--bb-ink-3);max-width:84ch}.bb-app .dx-intro-strand-count{font-size:var(--rl-fs-micro);color:var(--bb-ink-3);text-align:right;white-space:nowrap}.bb-app .dx-start-btn{max-width:320px}.bb-app .dx-card{border:1px solid var(--bb-line);border-radius:var(--rl-radius-lg);background:var(--bb-surface);max-width:720px;box-shadow:var(--bb-shadow-sm);padding:22px 24px}.bb-app .dx-card-meta{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.bb-app .dx-card-strand{font-size:var(--rl-fs-micro);letter-spacing:.06em;text-transform:uppercase;color:var(--bb-accent);align-items:center;gap:8px;font-weight:600;display:flex}.bb-app .dx-card-topic{font-size:var(--rl-fs-10-5);letter-spacing:0;text-transform:none;color:var(--bb-ink-3);font-weight:400}.bb-app .dx-card-count{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3)}.bb-app .dx-card-prompt{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);margin:0 0 18px;font-size:19px;font-weight:500;line-height:1.4}.bb-app .dx-options{gap:8px;margin-bottom:4px;display:grid}.bb-app .dx-option{text-align:left;border:1px solid var(--bb-line);background:var(--bb-surface-2);font-size:var(--rl-fs-13-5);color:var(--bb-ink-2);border-radius:9px;justify-content:space-between;align-items:center;gap:10px;padding:11px 14px;transition:border-color .12s,background .12s;display:flex}.bb-app .dx-option:hover:not(:disabled){border-color:var(--bb-ink-3);color:var(--bb-ink)}.bb-app .dx-option:disabled{cursor:default}.bb-app .dx-option.is-correct{border-color:var(--bb-ok);background:color-mix(in oklab, var(--bb-ok), transparent 88%);color:var(--bb-ink)}.bb-app .dx-option.is-wrong{border-color:var(--bb-bad);background:var(--bb-bad-soft);color:var(--bb-ink)}.bb-app .dx-option.is-muted{opacity:.55}.bb-app .dx-option-icon{flex:none;display:inline-flex}.bb-app .dx-option.is-correct .dx-option-icon{color:var(--bb-ok)}.bb-app .dx-option.is-wrong .dx-option-icon{color:var(--bb-bad)}.bb-app .dx-feedback{border:1px dashed var(--bb-line);border-radius:10px;margin-top:16px;padding:14px 16px}.bb-app .dx-feedback.is-correct{border-color:var(--bb-ok);background:color-mix(in oklab, var(--bb-ok), transparent 92%)}.bb-app .dx-feedback.is-wrong{border-color:var(--bb-bad);background:var(--bb-bad-soft)}.bb-app .dx-feedback-title{font-size:var(--rl-fs-meta);color:var(--bb-ink);margin:0 0 6px;font-weight:600}.bb-app .dx-feedback-explain{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);margin:0 0 12px;line-height:1.5}.bb-app .dx-next-btn{height:var(--rl-btn-sm-height);border-radius:var(--rl-btn-sm-radius);background:var(--bb-ink);color:var(--bb-paper);font-size:var(--rl-fs-12-5);padding:0 16px;font-weight:600}html.dark .bb-app .dx-next-btn{color:var(--bb-ink)}.bb-app .dx-next-btn:hover{filter:brightness(1.08)}.bb-app .dx-results{flex-direction:column;gap:22px;display:flex}.bb-app .dx-results-head{align-items:center;gap:18px;display:flex}.bb-app .dx-score-ring{border:3px solid var(--bb-accent);width:64px;height:64px;font-family:var(--font-plex-mono), monospace;border-radius:50%;flex:none;justify-content:center;align-items:baseline;gap:1px;display:flex}.bb-app .dx-score-n{font-size:var(--rl-fs-h4);color:var(--bb-ink);font-weight:600}.bb-app .dx-score-u{font-size:var(--rl-fs-micro);color:var(--bb-ink-3)}.bb-app .dx-results-title{font-family:var(--font-newsreader), Georgia, serif;font-size:var(--rl-fs-h3);color:var(--bb-ink);margin:0 0 4px}.bb-app .dx-results-sub{font-size:var(--rl-fs-12-5);color:var(--bb-ink-3);max-width:56ch;margin:0;line-height:1.5}.bb-app .dx-strand-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;display:grid}.bb-app .dx-strand-card{border:1px solid var(--bb-line);background:var(--bb-surface);border-radius:10px;padding:10px 12px}.bb-app .dx-strand-card-head{font-size:var(--rl-fs-label);color:var(--bb-ink-2);justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.bb-app .dx-strand-track{border-radius:var(--rl-radius-xs);background:var(--bb-line-2);height:6px;overflow:hidden}.bb-app .dx-strand-fill{border-radius:var(--rl-radius-xs);background:var(--bb-ink-4);height:100%}.bb-app .dx-strand-fill.is-good{background:var(--bb-ok)}.bb-app .dx-strand-fill.is-mid{background:var(--bb-warn)}.bb-app .dx-strand-fill.is-low{background:var(--bb-bad)}.bb-app .dx-missed{border:1px solid var(--bb-line);border-radius:var(--rl-radius-lg);background:var(--bb-surface);padding:18px 20px}.bb-app .dx-missed-empty{color:var(--bb-ink-3);font-size:var(--rl-fs-meta)}.bb-app .dx-missed-head{font-size:var(--rl-fs-10-5);letter-spacing:.12em;text-transform:uppercase;color:var(--bb-ink-3);margin-bottom:12px}.bb-app .dx-missed-list{gap:14px;margin:0;padding:0;list-style:none;display:grid}.bb-app .dx-missed-item{border-top:1px solid var(--bb-line-2);padding-top:12px}.bb-app .dx-missed-item:first-child{border-top:none;padding-top:0}.bb-app .dx-missed-item-head{align-items:center;gap:8px;margin-bottom:4px;display:flex}.bb-app .dx-missed-topic{font-size:var(--rl-fs-micro);color:var(--bb-accent);font-weight:600}.bb-app .dx-missed-topic-title{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3)}.bb-app .dx-missed-prompt{font-size:var(--rl-fs-13-5);color:var(--bb-ink);max-width:84ch;margin:0 0 6px;font-weight:500}.bb-app .dx-missed-misconception{font-size:var(--rl-fs-12-5);color:var(--bb-bad);max-width:84ch;margin:0 0 4px}html.dark .bb-app .dx-missed-misconception{color:var(--bb-warn)}.bb-app .dx-missed-explain{font-size:var(--rl-fs-label);color:var(--bb-ink-3);max-width:84ch;margin:0;line-height:1.5}.bb-app .dx-gap-pack{border:1px dashed var(--bb-accent-line);border-radius:var(--rl-radius-lg);background:var(--bb-accent-soft);padding:18px 20px}.bb-app .dx-gap-list{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:6px 18px;margin:12px 0 16px;padding:0;list-style:none;display:grid}.bb-app .dx-gap-item{font-size:var(--rl-fs-meta)}.bb-app .dx-gap-check-label{cursor:pointer;align-items:center;gap:8px;display:flex}.bb-app .dx-gap-topic{color:var(--bb-accent);min-width:34px;font-weight:600}.bb-app .dx-gap-btn{max-width:280px;text-decoration:none}.bb-app .dx-results-actions{flex-wrap:wrap;align-items:center;gap:16px;display:flex}.bb-app .dx-retake-btn,.bb-app .dx-print-btn{align-self:flex-start}@media (max-width:640px){.bb-app .dx-intro-strands{grid-template-columns:minmax(0,1fr)}.bb-app .dx-intro-strand{grid-template-columns:minmax(0,1fr);align-items:start}.bb-app .dx-intro-strand-count{text-align:left}.bb-app .dx-results-head{flex-wrap:wrap}}.bb-app .dx-progress{margin:0 0 14px}.bb-app .dx-progress-track{border-radius:var(--rl-radius-xs);background:var(--bb-line-2);height:5px;overflow:hidden}.bb-app .dx-progress-fill{border-radius:var(--rl-radius-xs);background:var(--bb-accent);height:100%}.bb-app .dx-streak-chip{border:1px solid var(--bb-accent-line);border-radius:var(--rl-radius-pill);background:var(--bb-accent-soft);width:fit-content;color:var(--bb-accent);font-size:var(--rl-fs-11-5);align-items:center;gap:6px;margin:12px 0 0;padding:4px 10px;font-weight:600;display:inline-flex}.bb-app .dx-strand-cleared{border-radius:var(--rl-radius-pill);background:color-mix(in oklab, var(--bb-ok), transparent 88%);width:fit-content;color:var(--bb-ok);letter-spacing:.04em;text-transform:uppercase;align-items:center;margin:0 0 8px;padding:2px 8px;font-size:9.5px;font-weight:700;display:inline-flex}@media (prefers-reduced-motion:no-preference){.bb-app .dx-progress-fill{transition:width .26s}.bb-app .dx-streak-chip,.bb-app .dx-strand-cleared{animation:.26s cubic-bezier(.2,.7,.2,1) both dx-chip-in}.bb-app .dx-score-ring{animation:.48s cubic-bezier(.2,.7,.2,1) both dx-score-in}.bb-app .dx-option{transition:border-color .12s,background .12s,transform .1s}.bb-app .dx-option:active:not(:disabled){transform:scale(.97)}.bb-app .dx-option.is-correct{animation:.42s dx-flash-correct}.bb-app .dx-option.is-wrong{animation:.42s dx-shake-wrong}}@keyframes dx-chip-in{0%{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}@keyframes dx-score-in{0%{opacity:0;transform:scale(.7)}to{opacity:1;transform:scale(1)}}@keyframes dx-flash-correct{0%{background:color-mix(in oklab, var(--bb-ok), transparent 40%)}to{background:color-mix(in oklab, var(--bb-ok), transparent 88%)}}@keyframes dx-shake-wrong{0%,to{transform:translate(0)}20%{transform:translate(-4px)}40%{transform:translate(4px)}60%{transform:translate(-3px)}80%{transform:translate(3px)}}.dx-embed.bb-app{background:0 0;min-height:0;position:static}.dx-embed.bb-app:before{content:none}.bb-app .mp-preset-btn{border:1px solid var(--bb-line);background:var(--bb-surface);color:var(--bb-ink-2);border-radius:var(--rl-radius-pill);font-size:var(--rl-fs-micro);padding:5px 11px;transition:border-color .1s,color .1s}.bb-app .mp-preset-btn:hover{border-color:var(--bb-accent-line);color:var(--bb-accent)}.bb-app .mp-seed-shuffle{border:1px solid var(--bb-accent-line);background:var(--bb-accent-soft);color:var(--bb-accent);font-size:var(--rl-fs-11-5);white-space:nowrap;border-radius:7px;flex-shrink:0;align-items:center;gap:5px;padding:6px 10px;font-weight:500;display:inline-flex}.bb-app .mp-seed-shuffle:hover{filter:brightness(1.05)}.bb-app .mp-marks-diff{font-size:var(--rl-fs-11-5);color:var(--bb-warn);text-align:center;margin:-4px 0 2px}.bb-app .mp-marks-diff.is-close{color:var(--bb-ink-3)}.bb-app .pb-empty{text-align:center;color:var(--bb-ink-3);font-size:var(--rl-fs-meta);padding:40px 0}.bb-app .pb-soon{border:1px solid var(--bb-accent-line);background:var(--bb-accent-soft);font-size:var(--rl-fs-meta);color:var(--bb-ink-2);border-radius:10px;padding:14px 16px}.bb-app .pb-soon strong{color:var(--bb-ink);margin-bottom:3px;font-weight:600;display:block}.bb-app .pb-soon p{margin:0}.bb-app .badge-legend{font-size:var(--rl-fs-label);color:var(--bb-ink-3);background:var(--bb-surface);border:1px solid var(--bb-line);border-radius:9px;flex-wrap:wrap;align-items:center;gap:6px 14px;padding:9px 13px;display:flex}.bb-app .badge-legend-lbl{font-size:var(--rl-fs-10-5);letter-spacing:.04em;text-transform:uppercase;color:var(--bb-ink-3)}.bb-app .badge-legend-item{align-items:center;gap:5px;display:inline-flex}.bb-app .badge-legend-x{font-size:var(--rl-fs-label);margin-left:auto}.bb-app .sh-levels{flex-direction:column;gap:30px;display:flex}.bb-app .sh-level-title{font-family:var(--font-newsreader), Georgia, serif;letter-spacing:-.01em;color:var(--bb-ink);border-bottom:1px solid var(--bb-line);margin:0 0 12px;padding-bottom:8px;font-size:23px;font-weight:400}.bb-app .sh-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;display:grid}.bb-app .sh-card{background:var(--bb-surface);border:1px solid var(--bb-line);box-shadow:var(--bb-shadow-sm);border-radius:10px;flex-direction:column;gap:10px;padding:16px;transition:border-color .12s;display:flex}.bb-app .sh-card:hover{border-color:var(--bb-accent-line)}.bb-app .sh-card-head{align-items:center;gap:10px;display:flex}.bb-app .sh-card-icon{border-radius:var(--rl-radius-md);background:var(--bb-accent-soft);border:1px solid var(--bb-accent-line);width:30px;height:30px;color:var(--bb-accent);flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}.bb-app .sh-card-name{font-size:var(--rl-fs-14-5);letter-spacing:-.005em;min-width:0;margin:0;font-weight:600}.bb-app .sh-card-boards{letter-spacing:.04em;text-transform:uppercase;border:1px solid var(--bb-line);color:var(--bb-ink-3);white-space:nowrap;border-radius:100px;flex-shrink:0;margin-left:auto;padding:2px 7px;font-size:10px}.bb-app .sh-card-links{flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;display:flex}.bb-app .sh-card-link{border-radius:var(--rl-radius-sm);font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);align-items:center;gap:8px;margin:0 -8px;padding:6px 8px;line-height:16px;text-decoration:none;display:flex}.bb-app .sh-card-link:before{content:"";background:var(--bb-accent);opacity:.75;border-radius:50%;flex-shrink:0;width:4px;height:4px}.bb-app .sh-card-link:hover{background:var(--bb-surface-2);color:var(--bb-ink)}.bb-app .tag{box-sizing:border-box;height:20px;line-height:1;font-family:var(--font-plex-mono), "IBM Plex Mono", ui-monospace, monospace;font-feature-settings:"tnum" 1;letter-spacing:.04em;white-space:nowrap;background:0 0;border:1px solid #0000;border-radius:5px;align-items:center;gap:5px;padding:0 8px;font-size:10px;font-weight:600;display:inline-flex}.bb-app .tag.tag--mini{gap:4px;height:16px;padding:0 6px;font-size:8.5px}.bb-app .tag .tag-label{display:block}.bb-app .tag.tag--mini .tag-label{position:relative;top:.3px}.bb-app .tag.tag--dot:before{content:"";background:currentColor;border-radius:50%;flex:none;width:6px;height:6px}.bb-app .tag.tag--mini.tag--dot:before{width:5px;height:5px}.bb-app .tag--tier{text-transform:uppercase}.bb-app .tag--tier-f{color:var(--bb-tier-f);background:color-mix(in oklab, var(--bb-tier-f), transparent 88%);border-color:color-mix(in oklab, var(--bb-tier-f), transparent 70%)}.bb-app .tag--tier-h{color:var(--bb-accent-2);background:var(--bb-brown-soft);border-color:var(--bb-brown-line)}.bb-app .tag--tier-c{color:var(--bb-tier-c);background:var(--bb-warn-soft);border-color:color-mix(in oklab, var(--bb-tier-c), transparent 70%)}.bb-app .tag--frequency{justify-content:center;width:42px}.bb-app .topic-pct-cell.is-fh .tag--frequency,.bb-app .topic.pp-pick .tag--frequency,.bb-app .pdp-legend .tag--frequency,.bb-app .pdp-topic-band .tag--frequency{width:auto}.bb-app .tag--freq-high{color:var(--bb-ok);background:color-mix(in oklab, var(--bb-ok), transparent 88%);border-color:color-mix(in oklab, var(--bb-ok), transparent 74%)}.bb-app .tag--freq-mid{color:var(--bb-warn);background:var(--bb-warn-soft);border-color:color-mix(in oklab, var(--bb-warn), transparent 70%)}.bb-app .tag--freq-neutral{color:var(--bb-ink-3);background:var(--bb-surface-2);border-color:var(--bb-line)}.bb-app .tag--freq-verylow{color:var(--bb-ink-3);background:var(--bb-surface-2);border-color:var(--bb-line);border-style:dashed}.bb-app .tag--board{text-transform:uppercase}.bb-app .tag--board.tag--interactive{text-transform:none}.bb-app .tag--tone-neutral{color:var(--bb-ink-3);background:var(--bb-surface-2);border-color:var(--bb-line)}.bb-app .tag--tone-accent{color:var(--bb-accent);background:var(--bb-accent-soft);border-color:var(--bb-accent-line)}.bb-app .tag--tone-success{color:var(--bb-ok);background:color-mix(in oklab, var(--bb-ok), transparent 92%);border-color:color-mix(in oklab, var(--bb-ok), transparent 68%);text-transform:none}.bb-app .tag--interactive{cursor:pointer;font:inherit;letter-spacing:inherit;text-overflow:ellipsis;max-width:100%;transition:background 80ms,color 80ms;overflow:hidden}.bb-app .tag--interactive .mono{font-weight:600}.bb-app .tag--interactive:hover{background:var(--bb-accent);color:#fff;border-color:var(--bb-accent)}html.dark .bb-app .tag--interactive:hover{color:var(--bb-paper)}.bb-app .tag--status{text-transform:uppercase}.bb-app .tag--tone-danger{color:var(--bb-bad);background:var(--bb-bad-soft);border-color:color-mix(in oklab, var(--bb-bad), transparent 70%)}.bb-app .rail-item:focus-visible,.bb-app .rail1-item:focus-visible,.bb-app .rd-btn:focus-visible,.bb-app .rd-opt:focus-visible,.bb-app .lvl-seg:focus-visible,.bb-app .crumb-link:focus-visible,.bb-app .lvl-chip:focus-visible,.bb-app .strand-chip:focus-visible,.bb-app .subject-card:focus-visible,.bb-app .qa-card:focus-visible,.bb-app .tier-tab:focus-visible,.bb-app :where(a[href],button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.bb-app .switcher-ic{border-radius:var(--rl-radius-sm);width:22px;height:22px;color:var(--bb-accent);background:var(--bb-accent-soft);flex:none;place-items:center;display:grid}.bb-app .switcher-ic.brown{color:var(--bb-accent-2);background:var(--bb-brown-soft)}.bb-app .crumb-subject{color:var(--bb-ink-2);align-items:center;gap:6px;display:inline-flex}.bb-app .crumb-subject:hover{color:var(--bb-accent)}.bb-app .crumb-lvl{font-size:var(--rl-fs-10-5);letter-spacing:.04em;color:var(--bb-ink-2);background:var(--bb-surface);border:1px solid var(--bb-line);white-space:nowrap;border-radius:100px;padding:3px 10px}.bb-app .rail1-nav{flex-direction:column;gap:10px;display:flex}.bb-app .rail1-item{border-radius:var(--rl-radius-lg);background:0 0;border:none;flex-direction:column;align-items:center;gap:4px;padding:0;text-decoration:none;display:flex;position:relative}.bb-app .rail1-lbl{letter-spacing:.01em;color:var(--bb-ink-3);text-align:center;max-width:64px;font-size:9.5px;font-weight:600;line-height:1.25}.bb-app .rail1-item:hover .rail1-lbl{color:var(--bb-ink)}.bb-app .rail1-item.on .rail1-lbl{color:var(--bb-accent)}.bb-app .rail1-item.on.brown .rail1-lbl{color:var(--bb-accent-2)}.bb-app .rail1-ic{border-radius:var(--rl-radius-lg);width:40px;height:40px;color:var(--bb-ink-2);background:var(--bb-surface);border:1px solid var(--bb-line);place-items:center;transition:border-color .11s,color .11s,background .11s;display:grid}.bb-app .rail1-item:hover .rail1-ic{border-color:var(--bb-ink-4);color:var(--bb-ink)}.bb-app .rail1-item.on .rail1-ic{color:var(--bb-accent);background:var(--bb-accent-soft);border-color:var(--bb-accent-line);box-shadow:0 0 0 1px var(--bb-accent-line)}.bb-app .rail1-item.on.brown .rail1-ic{color:var(--bb-accent-2);background:var(--bb-brown-soft);border-color:var(--bb-brown-line);box-shadow:0 0 0 1px var(--bb-brown-line)}.bb-app .rd{position:relative}.bb-app .rd-btn{border-radius:var(--rl-radius-md);border:1px solid var(--bb-line);background:var(--bb-surface);width:100%;font:inherit;font-size:var(--rl-fs-13-5);color:var(--bb-ink);cursor:pointer;justify-content:space-between;align-items:center;gap:8px;padding:9px 12px;font-weight:500;transition:border-color .11s,box-shadow .11s;display:flex}.bb-app .rd-btn:hover:not(:disabled){border-color:var(--bb-ink-4)}.bb-app .rd-btn:disabled{cursor:default}.bb-app .rd.is-locked .rd-btn{background:var(--bb-surface-2);color:var(--bb-ink-2);border-style:dashed}.bb-app .rd-val{text-align:left;text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.bb-app .rd-ic{color:var(--bb-ink-3);flex:none;place-items:center;display:grid}.bb-app .rd.is-locked .rd-ic{color:var(--bb-ink-4)}.bb-app .rd-cae{color:var(--bb-ink-3);flex:none;transition:transform .14s;display:inline-flex}.bb-app .rd-cae.open{transform:rotate(180deg)}.bb-app .rd-scrim{z-index:40;position:fixed;inset:0}.bb-app .rd-menu{z-index:41;background:var(--bb-surface);border:1px solid var(--bb-line);box-shadow:var(--bb-shadow-md);border-radius:11px;max-height:280px;padding:5px;position:absolute;top:calc(100% + 6px);left:0;right:0;overflow-y:auto}.bb-app .rd-opt{cursor:pointer;width:100%;font:inherit;font-size:var(--rl-fs-meta);color:var(--bb-ink-2);text-align:left;background:0 0;border:none;border-radius:7px;justify-content:space-between;align-items:center;gap:8px;padding:8px 10px;display:flex}.bb-app .rd-opt:hover{background:var(--bb-surface-2);color:var(--bb-ink)}.bb-app .rd-opt.on{color:var(--bb-accent);font-weight:600}.bb-app .rd-opt.on svg{color:var(--bb-accent)}.bb-app .rd-btn.on-filter{border-color:var(--bb-accent-line);background:var(--bb-accent-soft)}.bb-app .rd-btn.on-filter .rd-ic,.bb-app .rd-btn.on-filter .rd-val{color:var(--bb-accent);font-weight:600}.bb-app .lvl-track{gap:3px;margin-top:9px;padding:0 2px;display:flex}.bb-app .lvl-seg{cursor:pointer;background-color:var(--bb-line);background-clip:content-box;border:none;border-radius:3px;flex:1;height:15px;padding:5.5px 0;transition:background-color .11s;position:relative}.bb-app .lvl-seg:hover{background-color:var(--bb-ink-4)}.bb-app .lvl-seg.cur{background-color:var(--bb-accent)}.bb-app .lvl-seg:after{content:attr(data-tip);background:var(--bb-ink);color:var(--bb-paper);font-size:var(--rl-fs-10-5);border-radius:var(--rl-radius-sm);white-space:nowrap;opacity:0;pointer-events:none;z-index:60;box-shadow:var(--bb-shadow-md);padding:4px 9px;font-weight:500;transition:opacity .12s 60ms;position:absolute;bottom:calc(100% + 4px);left:50%;translate:-50%}.bb-app .lvl-seg:hover:after,.bb-app .lvl-seg:focus-visible:after{opacity:1}.bb-app .lvl-ends{font-family:var(--font-plex-mono), ui-monospace, monospace;letter-spacing:.06em;text-transform:uppercase;color:var(--bb-ink-3);justify-content:space-between;margin-top:5px;padding:0 2px;font-size:8.5px;display:flex}.bb-app .rail-item{position:relative}.bb-app .rail-item.is-active:before{content:"";background:var(--bb-accent);border-radius:0 3px 3px 0;width:3px;height:20px;position:absolute;top:50%;left:-16px;transform:translateY(-50%)}.bb-app .rail-cnt{color:var(--bb-ink-3);flex-shrink:0;margin-left:auto;font-size:10px;font-weight:400}.bb-app .rail-item.is-active .rail-cnt{color:var(--bb-accent)}.bb-app .home{width:100%;margin:0;padding:8px 0 40px}.bb-app .home-hero{justify-content:space-between;align-items:flex-end;gap:64px;margin-bottom:22px;display:flex}.bb-app .home-hero-copy{flex:auto;min-width:0}.bb-app .home-eyebrow{font-size:var(--rl-fs-10-5);letter-spacing:.16em;text-transform:uppercase;color:var(--bb-accent-2);align-items:center;gap:7px;margin-bottom:14px;display:inline-flex}.bb-app .home-title{font-family:var(--font-newsreader), Georgia, serif;letter-spacing:-.022em;color:var(--bb-ink);margin:0;font-size:46px;font-weight:400;line-height:1.02}.bb-app .home-title em{color:var(--bb-accent);font-style:italic;font-weight:300}.bb-app .home-sec-label{letter-spacing:.14em;text-transform:uppercase;color:var(--bb-ink-3);align-items:center;gap:10px;margin:0 0 14px;font-size:10px;display:flex}.bb-app .home-sec-label:after{content:"";background:var(--bb-line);flex:1;height:1px}.bb-app .subject-grid{grid-template-columns:1fr;gap:12px;margin-bottom:40px;display:grid}.bb-app .subject-card{text-align:left;background:var(--bb-surface);border:1px solid var(--bb-line);border-radius:var(--rl-radius-lg);box-shadow:var(--bb-shadow-sm);color:var(--bb-ink);flex-direction:column;gap:2px;padding:13px;text-decoration:none;transition:border-color .12s,box-shadow .12s,transform .12s;display:flex;position:relative;overflow:hidden}.bb-app .subject-card:hover{border-color:var(--bb-accent-line);box-shadow:var(--bb-shadow-md)}.bb-app .subject-card-ic{border-radius:var(--rl-radius-md);width:30px;height:30px;color:var(--bb-accent);background:var(--bb-accent-soft);border:1px solid var(--bb-accent-line);place-items:center;margin-bottom:8px;display:grid}.bb-app .subject-card-ic svg{width:15px;height:15px}.bb-app .subject-card-ic.brown{color:var(--bb-accent-2);background:var(--bb-brown-soft);border-color:var(--bb-brown-line)}.bb-app .subject-card-name{color:var(--bb-ink);font-size:16.5px;line-height:1.1}.bb-app .subject-card-lvl{letter-spacing:.08em;text-transform:uppercase;color:var(--bb-ink-3);margin-top:3px;font-size:10px}.bb-app .subject-card-head{align-items:center;gap:9px;margin-bottom:7px;display:flex}.bb-app .subject-card-head .subject-card-ic{margin-bottom:0}.bb-app .subject-card-group{z-index:2;margin-top:5px;position:relative}.bb-app .subject-card-glabel{letter-spacing:.11em;text-transform:uppercase;color:var(--bb-ink-3);margin-bottom:4px;font-size:9px}.bb-app .chip-row{flex-wrap:wrap;gap:4px;display:flex}.bb-app .lvl-chip{white-space:nowrap;border-radius:var(--rl-radius-pill);font-size:var(--rl-fs-10-5);color:var(--bb-accent);background:var(--bb-accent-soft);border:1px solid var(--bb-accent-line);align-items:center;padding:2px 7px;font-weight:600;line-height:1.35;text-decoration:none;transition:border-color .12s,transform .12s,box-shadow .12s;display:inline-flex}.bb-app a.lvl-chip:hover{border-color:var(--bb-accent);box-shadow:var(--bb-shadow-sm);transform:translateY(-2px)}.bb-app .strand-chip{white-space:nowrap;border-radius:var(--rl-radius-sm);font-size:var(--rl-fs-10-5);color:var(--bb-ink-2);background:var(--bb-paper);border:1px solid var(--bb-line);align-items:center;padding:2px 7px;font-weight:500;line-height:1.35;text-decoration:none;transition:border-color .12s,color .12s,transform .12s,box-shadow .12s;display:inline-flex}.bb-app a.strand-chip:hover{border-color:var(--bb-ink-4);color:var(--bb-ink);box-shadow:var(--bb-shadow-sm);transform:translateY(-2px)}.bb-app .subject-card-go{color:var(--bb-ink-4);transition:transform .12s,color .12s;position:absolute;top:13px;right:13px}@media (min-width:780px){.bb-app .subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:1080px){.bb-app .subject-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (min-width:1360px){.bb-app .subject-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (min-width:1600px){.bb-app .subject-grid{grid-template-columns:repeat(5,minmax(0,1fr))}}@media (max-width:900px){.bb-app .home-hero{display:block}}.bb-app .subject-card:hover .subject-card-go{color:var(--bb-accent);transform:translate(2px)}.bb-app .qa-sec{margin-bottom:28px}.bb-app .qa-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;display:grid}.bb-app .qa-card{text-align:left;background:var(--bb-surface);border:1px solid var(--bb-line);box-shadow:var(--bb-shadow-sm);color:var(--bb-ink);border-radius:11px;flex-direction:column;align-items:flex-start;padding:18px;text-decoration:none;transition:border-color .12s,box-shadow .12s,transform .12s;display:flex}.bb-app .qa-card:hover{border-color:var(--bb-accent-line);box-shadow:var(--bb-shadow-md);transform:translateY(-2px)}.bb-app .qa-ic{width:34px;height:34px;color:var(--bb-accent);background:var(--bb-accent-soft);border-radius:9px;place-items:center;margin-bottom:12px;display:grid}.bb-app .qa-ic.brown{color:var(--bb-accent-2);background:var(--bb-brown-soft)}.bb-app .qa-name{font-size:var(--rl-fs-ui);color:var(--bb-ink);font-weight:600}.bb-app .qa-desc{font-size:var(--rl-fs-label);color:var(--bb-ink-3);margin-top:3px;line-height:1.4}.bb-app .qa-meta{letter-spacing:.06em;text-transform:uppercase;color:var(--bb-ink-3);margin-top:12px;font-size:10px}.bb-app .level-gate-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;display:grid}@media (max-width:640px){.bb-app .level-gate-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}}.bb-app .level-card .subject-card-name{font-size:var(--rl-fs-h2)}.bb-app .level-card .subject-card-lvl{text-transform:none;letter-spacing:.04em}.bb-app .filterbar.is-sticky{z-index:40;background:color-mix(in oklab, var(--bb-paper), white 22%);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border:1px solid var(--bb-line-2);border-radius:9px;margin:0 -10px 18px;padding:10px;position:sticky;top:56px}html.dark .bb-app .filterbar.is-sticky{background:color-mix(in oklab, var(--bb-paper), black 16%)}.bb-app .library.browse{container-type:inline-size}.bb-app :is(.library.browse,.pp-col-stack) .topic{cursor:default;-webkit-user-select:text;user-select:text;min-width:0;padding:7px 9px;display:block}.bb-app :is(.library.browse,.pp-col-stack) .topic-head{flex-wrap:wrap;align-items:center;gap:3px 8px;display:flex}.bb-app :is(.library.browse,.pp-col-stack) .topic-name{text-overflow:clip;white-space:normal;text-wrap:pretty;overflow-wrap:break-word;flex:0 0 100%;order:1;min-width:0;overflow:visible}.bb-app :is(.library.browse,.pp-col-stack) .topic-num{text-overflow:clip;flex:none;overflow:visible}.bb-app :is(.library.browse,.pp-col-stack) .topic-badges{flex:auto;justify-content:flex-start}.bb-app :is(.library.browse,.pp-col-stack) .topic-badges:empty{display:none}.bb-app :is(.library.browse,.pp-col-stack) .topic-badges>*{flex:none}.bb-app :is(.library.browse,.pp-col-stack) .topic-rail{overscroll-behavior-x:contain;scrollbar-width:thin;flex-wrap:nowrap;align-items:center;gap:6px;min-width:0;min-height:24px;margin:3px -9px 0;padding:0 9px;display:flex;overflow-x:auto}.bb-app :is(.library.browse,.pp-col-stack) .topic-rail>*{flex:none}@container (min-width:420px){.bb-app :is(.library.browse,.pp-col-stack) .topic{-moz-column-gap:10px;grid-template-columns:minmax(52px,auto) minmax(min(100%,11rem),1fr) auto;align-items:center;gap:4px 10px;padding:10px 12px;display:grid}.bb-app :is(.library.browse,.pp-col-stack) .topic-head{display:contents}.bb-app :is(.library.browse,.pp-col-stack) .topic-name{order:0}.bb-app :is(.library.browse,.pp-col-stack) .topic-badges{justify-content:flex-end;justify-self:end}.bb-app :is(.library.browse,.pp-col-stack) .topic.is-leadless{grid-template-columns:minmax(min(100%,11rem),1fr) auto}.bb-app :is(.library.browse,.pp-col-stack) .topic.is-leadless .topic-rail{grid-column:1/-1}.bb-app :is(.library.browse,.pp-col-stack) .topic-rail{flex-wrap:wrap;grid-column:2/-1;row-gap:5px;margin:0;padding:0;overflow:visible}}.bb-app .library.browse a.topic-row-link{cursor:pointer;color:inherit;text-decoration:none}.bb-app .library.browse a.topic-row-link:hover .topic-open{color:var(--bb-accent);border-color:var(--bb-accent-line)}.bb-app .library.browse a.topic-row-link:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.bb-app .topic-open{border:1px solid var(--bb-line);border-radius:var(--rl-radius-sm);min-height:20px;color:var(--bb-ink-3);background:var(--bb-surface-2);align-items:center;gap:2px;padding:3px 6px;line-height:1;transition:color 80ms,border 80ms;display:inline-flex}.bb-app .topic-open.is-missing{color:var(--bb-ink-3);pointer-events:none;border-style:dashed}.bb-app .topic-open:hover{color:var(--bb-accent);border-color:var(--bb-accent-line)}.bb-app .topic-open-n{white-space:nowrap;font-size:10px}.bb-app :is(.library.browse,.pp-col-stack) .topic:hover{background:var(--bb-surface);border-color:var(--bb-line)}.bb-app .topic-badges{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:5px 6px;display:inline-flex}.bb-app .topic-pages-u{color:var(--bb-ink-3)}.bb-app .library-empty{border:1px dashed var(--bb-line);background:var(--bb-surface-2);color:var(--bb-ink-3);font-size:var(--rl-fs-12-5);text-align:center;border-radius:7px;padding:22px 12px}.bb-app .library-empty p{margin:0}.bb-app .library-empty p+p{margin-top:8px}.bb-app .library-empty .ppa-links{justify-content:center}.bb-app .area{margin-top:18px}.bb-app .area:first-child{margin-top:6px}.bb-app .area-head{border-bottom:1px dashed var(--bb-line);justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:6px;padding:0 2px 6px;display:flex}.bb-app .area-title{font-size:var(--rl-fs-label);letter-spacing:.06em;text-transform:uppercase;color:var(--bb-ink-2);margin:0;font-weight:600}.bb-app .area-blurb{font-size:var(--rl-fs-label);color:var(--bb-ink-3);margin-top:2px}.bb-app .area-stat{font-size:var(--rl-fs-micro);color:var(--bb-ink-3);font-family:var(--font-plex-mono), monospace;white-space:nowrap;flex-shrink:0}.bb-app .area-rows{-moz-column-count:2;column-count:2;-moz-column-gap:28px;column-gap:28px}.bb-app .skill{-moz-column-break-inside:avoid;break-inside:avoid;border-radius:7px;width:100%;margin-bottom:2px;display:inline-block}.bb-app .area-rows>.topic{-moz-column-break-inside:avoid;break-inside:avoid;margin-bottom:2px}.bb-app .skill-head{cursor:pointer;border:1px solid #0000;border-radius:7px;grid-template-columns:52px 1fr auto;align-items:center;gap:10px;padding:11px 14px;list-style:none;display:grid}.bb-app .skill-head::-webkit-details-marker{display:none}.bb-app .skill-head:hover{background:var(--bb-surface);border-color:var(--bb-line)}.bb-app .skill-head:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.bb-app .skill-caret{color:var(--bb-ink-4);justify-self:end;transition:transform .12s;display:inline-flex;transform:rotate(-90deg)}.bb-app .skill[open]>.skill-head .skill-caret{transform:rotate(0)}.bb-app .skill[open]>.skill-head{background:var(--bb-surface-2)}.bb-app .skill-title{font-size:var(--rl-fs-13-5);color:var(--bb-ink);letter-spacing:-.005em;text-overflow:ellipsis;white-space:nowrap;min-width:0;font-weight:500;overflow:hidden}.bb-app .skill-count{font-size:var(--rl-fs-micro);color:var(--bb-ink-3);font-family:var(--font-plex-mono), monospace;white-space:nowrap}.bb-app .skill-rows{border-left:1px solid var(--bb-line);gap:2px;margin:2px 0 6px 25px;padding-left:10px;display:grid}.bb-app .skill-rows .topic{background:var(--bb-surface-2);border-color:var(--bb-line-2);border-radius:7px}.bb-app .skill-rows .topic:hover{background:var(--bb-accent-soft);border-color:var(--bb-accent-line)}.bb-app .topic-name.set-label{font-family:var(--font-plex-mono), monospace;font-size:var(--rl-fs-11-5);color:var(--bb-ink-2);font-weight:400}.bb-app .mock-searchbar{grid-template-columns:1fr;margin-bottom:10px}.bb-app .mock-filter-card{background:var(--bb-surface);border:1px solid var(--bb-line);box-shadow:var(--bb-shadow-sm);border-radius:9px;margin-bottom:10px;padding:13px 14px}.bb-app .mock-filter-controls{grid-template-columns:minmax(0,1fr) minmax(170px,230px) minmax(190px,240px);align-items:end;gap:12px;display:grid}.bb-app .mock-filter-field,.bb-app .searchable-select{flex-direction:column;gap:5px;min-width:0;display:flex;position:relative}.bb-app .mock-filter-label,.bb-app .searchable-select-label{letter-spacing:.08em;text-transform:uppercase;color:var(--bb-ink-3);font-size:10px}.bb-app .mock-test-tabs{width:100%;overflow-x:auto}.bb-app .mock-test-tabs .tier-tab{flex:1 0 auto;justify-content:center}.bb-app .mock-filter-select,.bb-app .searchable-select-trigger{border:1px solid var(--bb-line);background:var(--bb-surface);width:100%;height:36px;color:var(--bb-ink-2);font:inherit;font-size:var(--rl-fs-12-5);border-radius:7px;padding:0 11px}.bb-app .searchable-select-trigger{text-align:left;justify-content:space-between;align-items:center;gap:8px;display:flex}.bb-app .searchable-select-trigger:hover,.bb-app .mock-filter-select:hover{border-color:var(--bb-ink-4);color:var(--bb-ink)}.bb-app .searchable-select-popover{z-index:80;border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface);width:100%;min-width:220px;box-shadow:var(--bb-shadow-md);padding:7px;position:absolute;top:calc(100% + 5px);left:0}.bb-app .searchable-select-search{border:1px solid var(--bb-line);border-radius:var(--rl-radius-sm);height:34px;color:var(--bb-ink-3);background:var(--bb-paper);align-items:center;gap:7px;margin-bottom:5px;padding:0 9px;display:flex}.bb-app .searchable-select-search:focus-within{border-color:var(--bb-accent);color:var(--bb-ink)}.bb-app .searchable-select-search input{width:100%;min-width:0;color:var(--bb-ink);font:inherit;font-size:var(--rl-fs-12-5);background:0 0;border:0;outline:0}.bb-app .searchable-select-search input::placeholder{color:var(--bb-ink-4)}.bb-app .searchable-select-list{max-height:230px;overflow-y:auto}.bb-app .searchable-select-option{width:100%;min-height:34px;color:var(--bb-ink-2);font:inherit;font-size:var(--rl-fs-12-5);text-align:left;background:0 0;border:0;border-radius:5px;justify-content:space-between;align-items:center;gap:8px;padding:7px 9px;display:flex}.bb-app .searchable-select-option.is-active{background:var(--bb-accent-soft);color:var(--bb-ink)}.bb-app .searchable-select-empty{color:var(--bb-ink-3);font-size:var(--rl-fs-label);margin:0;padding:9px}.bb-app .mock-filter-open{display:none}.bb-app .mock-active-bar{min-height:38px;color:var(--bb-ink-3);justify-content:space-between;align-items:center;gap:14px;margin-bottom:18px;display:flex}.bb-app .mock-active-chips{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.bb-app .mock-active-chip{border:1px solid var(--bb-accent-line);border-radius:var(--rl-radius-pill);background:var(--bb-accent-soft);min-height:28px;color:var(--bb-ink-2);font-size:var(--rl-fs-11-5);align-items:center;gap:3px;padding-left:9px;display:inline-flex}.bb-app .mock-active-chip button{width:27px;height:27px;color:var(--bb-ink-3);background:0 0;border:0;border-radius:50%;place-items:center;padding:0;display:grid}.bb-app .mock-active-chip button:hover{color:var(--bb-ink)}.bb-app .mock-clear-all{color:var(--bb-accent);font:inherit;font-size:var(--rl-fs-label);text-underline-offset:2px;background:0 0;border:0;padding:5px 3px;text-decoration:underline}.bb-app .mock-match-count{font-size:var(--rl-fs-label);color:var(--bb-ink-3);flex-shrink:0}.bb-app .mock-match-count strong{color:var(--bb-ink);font-weight:600}.bb-app .entrance-filters{flex-direction:column;gap:10px;margin:0 0 16px;display:flex}.bb-app .entrance-filter-group{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.bb-app .entrance-filter-label{letter-spacing:.09em;text-transform:uppercase;color:var(--bb-ink-3);flex-shrink:0;font-size:10px;font-weight:600}.bb-app .entrance-chip-row{flex-wrap:wrap;gap:6px;display:flex}.bb-app .entrance-chip{border:1px solid var(--bb-line);border-radius:var(--rl-radius-pill);background:var(--bb-paper);color:var(--bb-ink-2);font:inherit;font-size:var(--rl-fs-label);cursor:pointer;align-items:center;gap:5px;padding:5px 10px;font-weight:500;transition:border-color .12s,color .12s,background .12s;display:inline-flex}.bb-app .entrance-chip:hover{border-color:var(--bb-ink-4);color:var(--bb-ink)}.bb-app .entrance-chip:focus-visible{outline:2px solid var(--bb-accent);outline-offset:1px}.bb-app .entrance-chip.is-active{border-color:var(--bb-accent-line);background:var(--bb-accent-soft);color:var(--bb-accent)}.bb-app .entrance-chip-count{color:var(--bb-ink-3);font-size:var(--rl-fs-10-5)}.bb-app .entrance-chip.is-active .entrance-chip-count{color:var(--bb-accent)}.bb-app .mock-filter-sheet-backdrop{z-index:120;background:color-mix(in oklab, var(--bb-ink), transparent 45%);justify-content:center;align-items:flex-end;display:flex;position:fixed;inset:0}.bb-app .mock-filter-sheet{border:1px solid var(--bb-line);background:var(--bb-paper);width:100%;max-height:88dvh;box-shadow:var(--bb-shadow-md);border-radius:12px 12px 0 0;padding:18px 18px 20px;animation:.13s both mock-filter-sheet-in;overflow-y:auto}@keyframes mock-filter-sheet-in{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}.bb-app .mock-filter-sheet-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px;display:flex}.bb-app .mock-filter-sheet-head h2{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);margin:0;font-size:23px;font-weight:400}.bb-app .mock-filter-sheet-close{border:1px solid var(--bb-line);background:var(--bb-surface);width:44px;height:44px;color:var(--bb-ink-2);border-radius:7px;place-items:center;padding:0;display:grid}.bb-app .mock-filter-confirm{border:1px solid var(--bb-accent);border-radius:var(--rl-radius-md);background:var(--bb-accent);width:100%;min-height:44px;color:var(--bb-paper);font:inherit;font-size:var(--rl-fs-meta);margin-top:18px;font-weight:600}@media (max-width:1180px){.bb-app .area-rows{-moz-column-count:1;column-count:1}}@media (prefers-reduced-motion:reduce){.bb-app .subject-card,.bb-app .qa-card,.bb-app .lvl-chip,.bb-app .strand-chip,.bb-app .subject-card-go{transition:none}.bb-app .qa-card:hover,.bb-app a.lvl-chip:hover,.bb-app a.strand-chip:hover,.bb-app .subject-card:hover .subject-card-go{transform:none}.bb-app .mock-filter-sheet{animation:none}}@media (max-width:720px){.bb-app .home{padding-top:0}.bb-app .home-title{font-size:34px}.bb-app .mock-searchbar.is-sticky{margin:0 0 10px;position:static}.bb-app .mock-filter-card{display:none}.bb-app .mock-filter-open{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface);width:100%;min-height:44px;color:var(--bb-ink);font:inherit;font-size:var(--rl-fs-meta);justify-content:space-between;align-items:center;margin-bottom:10px;padding:0 13px;font-weight:600;display:flex}.bb-app .mock-active-bar{flex-direction:column;align-items:flex-start;gap:8px;margin-bottom:16px}.bb-app .mock-active-chip{min-height:44px;padding-left:11px}.bb-app .mock-active-chip button{width:43px;height:43px}.bb-app .mock-clear-all{min-height:44px;padding:0 6px}.bb-app .mock-filter-sheet .mock-filter-controls{grid-template-columns:1fr;gap:16px}.bb-app .mock-filter-sheet .mock-filter-select,.bb-app .mock-filter-sheet .searchable-select-trigger,.bb-app .mock-searchbar .search,.bb-app .mock-searchbar .search-clear,.bb-app .mock-filter-sheet .searchable-select-search{height:44px}.bb-app .mock-searchbar .search-clear{place-items:center;width:44px;margin-right:-12px;display:grid}.bb-app .mock-filter-sheet .mock-test-tabs{flex-wrap:wrap;height:auto;overflow-x:visible}.bb-app .mock-filter-sheet .mock-test-tabs .tier-tab{flex:auto;min-width:44px;min-height:44px}.bb-app .mock-filter-sheet .searchable-select-option{min-height:44px}.bb-app .rail-drawer .rail-item{padding:14px 11px}}@media (hover:none){.bb-app .mock-filter-select,.bb-app .searchable-select-trigger,.bb-app .searchable-select-search{height:44px}.bb-app .mock-test-tabs{height:52px}.bb-app .mock-test-tabs .tier-tab{height:44px}.bb-app .mock-filter-sheet .mock-test-tabs{height:auto}.bb-app .searchable-select-option,.bb-app .mock-active-chip{min-height:44px}.bb-app .mock-active-chip button{width:44px;height:44px}.bb-app .mock-clear-all{min-height:44px}}@keyframes rail-drill-in{0%{opacity:0;transform:translate(46px)}to{opacity:1;transform:translate(0)}}@keyframes rail-drill-back{0%{opacity:0;transform:translate(-46px)}to{opacity:1;transform:translate(0)}}.bb-app .rail2{overflow-x:hidden}@keyframes rail2-glide-in{0%{opacity:0;transform:translate(-36px)}to{opacity:1;transform:translate(0)}}.bb-app .rail2.rail-slide-in{animation:.36s cubic-bezier(.22,1,.36,1) both rail2-glide-in}.bb-app .rail2.rail-slide-in>*{animation:.24s cubic-bezier(.22,1,.36,1) both rail-drill-in}.bb-app .rail2.rail-slide-back>*{animation:.24s cubic-bezier(.22,1,.36,1) both rail-drill-back}@keyframes surf-rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.bb-app .shell.surf-in>:not(aside){animation:.24s cubic-bezier(.22,1,.36,1) both rail-drill-in}.bb-app .shell.surf-back>:not(aside){animation:.24s cubic-bezier(.22,1,.36,1) both rail-drill-back}.bb-app .shell.surf-rise>:not(aside){animation:.2s ease-out both surf-rise}@media (prefers-reduced-motion:reduce){.bb-app .rail2.rail-slide-in,.bb-app .rail2.rail-slide-in>*,.bb-app .rail2.rail-slide-back>*,.bb-app .shell.surf-in>:not(aside),.bb-app .shell.surf-back>:not(aside),.bb-app .shell.surf-rise>:not(aside){animation:none}}.bb-app .crumb-link{color:var(--bb-ink-3);text-decoration:none}.bb-app .crumb-link:hover{color:var(--bb-ink)}.bb-app .pp-source-switch{align-items:center;gap:10px;margin-bottom:16px;display:flex}.bb-app .pp-source-switch>span,.bb-app .pp-tier-plain{letter-spacing:.08em;text-transform:uppercase;color:var(--bb-ink-3);font-size:10px}.bb-app .topbar-exit-btn{width:28px;min-width:28px;margin-right:2px;padding:0;text-decoration:none}.bb-app .rail-item.rail-sub{font-size:var(--rl-fs-12-5);padding-left:30px}.bb-app .rail-item.rail-sub .rail-icon svg{width:14px;height:14px}.bb-app .subject-hint{font-size:var(--rl-fs-12-5);color:var(--bb-ink-3);background:var(--bb-surface);border:1px solid var(--bb-line);border-radius:9px;flex-wrap:wrap;align-items:baseline;gap:4px;margin-bottom:14px;padding:9px 13px;display:flex}.bb-app .subject-hint a{color:var(--bb-accent);font-weight:600}.bb-app .gate-crosslink{font-size:var(--rl-fs-12-5);color:var(--bb-ink-3);margin-top:18px}.bb-app .gate-crosslink a{color:var(--bb-accent);font-weight:600}.bb-app .qa-card.is-soon{opacity:.55;cursor:default}.bb-app .qa-card.is-soon:hover{border-color:var(--bb-line);box-shadow:var(--bb-shadow-sm);transform:none}.bb-app .subject-card-cover{z-index:1;border-radius:var(--rl-radius-lg);position:absolute;inset:0}.bb-app .subject-card-cover:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px;border-radius:var(--rl-radius-lg)}.bb-app .pp-papers{flex-direction:column;gap:36px;display:flex}.bb-app .pp-year-head{border-bottom:1px solid var(--bb-line);justify-content:space-between;align-items:baseline;margin-bottom:16px;padding-bottom:12px;display:flex}.bb-app .pp-year-title{font-family:var(--font-newsreader), Georgia, serif;letter-spacing:-.02em;color:var(--bb-ink);margin:0;font-size:30px;font-weight:400}.bb-app .pp-year-count{font-size:var(--rl-fs-label);color:var(--bb-ink-3)}.bb-app .pp-cols{grid-template-columns:1fr 1fr;align-items:start;gap:22px 28px;display:grid}.bb-app .pp-cols.pp-cols-3{grid-template-columns:1fr 1fr 1fr}.bb-app .pp-cols.pp-cols-1{grid-template-columns:1fr}.bb-app .pp-col{flex-direction:column;gap:12px;min-width:0;display:flex}.bb-app .pp-col-stack{flex-direction:column;gap:12px;display:flex;container-type:inline-size}.bb-app .pp-col-empty{font-size:var(--rl-fs-label);color:var(--bb-ink-3);padding:6px 2px}.bb-app .pp-col-label{z-index:3;border:1px solid var(--bb-line-2);background:color-mix(in oklab, var(--bb-paper), white 22%);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-radius:7px;align-items:center;gap:8px;margin:0 -10px 4px;padding:6px 10px;display:flex;position:sticky;top:62px}html.dark .bb-app .pp-col-label{background:color-mix(in oklab, var(--bb-paper), black 16%)}@media (max-width:1180px){.bb-app .pp-cols,.bb-app .pp-cols.pp-cols-3{grid-template-columns:1fr}}.bb-app .pp-card-meta{font-size:var(--rl-fs-micro);color:var(--bb-ink-3)}.bb-app .pp-card-view{color:#fff;background:var(--bb-accent);border-color:var(--bb-accent);box-shadow:0 1px 0 #ffffff2e inset, 0 4px 12px -6px var(--bb-accent);font-weight:600}html.dark .bb-app .pp-card-view{color:var(--bb-paper)}.bb-app .pp-card-view:hover:not(:disabled){filter:brightness(1.05);color:#fff;border-color:var(--bb-accent)}html.dark .bb-app .pp-card-view:hover:not(:disabled){color:var(--bb-paper)}.bb-app .pp-card-view:active:not(:disabled){transform:translateY(1px)}.bb-app .topic-open.pp-card-view:disabled{background:var(--bb-surface-2);border-color:var(--bb-line);color:var(--bb-ink-4);box-shadow:none;cursor:default;filter:none}.bb-app .pp-qd-scrim{z-index:990;background:color-mix(in oklab, var(--bb-ink), transparent 55%);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);animation:.18s both pp-qd-fade;position:fixed;inset:0}@keyframes pp-qd-fade{0%{opacity:0}to{opacity:1}}@keyframes pp-qd-slide{0%{opacity:0;transform:translate(24px)}to{opacity:1;transform:translate(0)}}.bb-app .pp-qd{z-index:1000;background:var(--bb-paper);border-left:1px solid var(--bb-line);outline:none;flex-direction:column;width:min(540px,100vw);animation:.24s cubic-bezier(.22,1,.36,1) both pp-qd-slide;display:flex;position:fixed;top:0;bottom:0;right:0;box-shadow:-20px 0 60px -20px #16140f66}.bb-app .pp-qd-head{z-index:2;border-bottom:1px solid var(--bb-line);background:color-mix(in oklab, var(--bb-paper), white 20%);align-items:flex-start;gap:12px;padding:18px 18px 14px;display:flex;position:sticky;top:0}html.dark .bb-app .pp-qd-head{background:color-mix(in oklab, var(--bb-paper), black 14%)}.bb-app .pp-qd-head-main{flex:1;min-width:0}.bb-app .pp-qd-eyebrow{letter-spacing:.14em;text-transform:uppercase;color:var(--bb-ink-3);margin-bottom:6px;font-size:9.5px}.bb-app .pp-qd-title{font-family:var(--font-newsreader), Georgia, serif;font-weight:400;font-size:var(--rl-fs-h2);color:var(--bb-ink);margin:0;line-height:1.05}.bb-app .pp-qd-tags{flex-wrap:wrap;align-items:center;gap:6px;margin-top:9px;display:flex}.bb-app .pp-qd-close{border-radius:var(--rl-radius-md);width:34px;height:34px;color:var(--bb-ink-2);background:var(--bb-surface);border:1px solid var(--bb-line);flex:none;place-items:center;display:grid}.bb-app .pp-qd-close:hover{color:var(--bb-ink);border-color:var(--bb-ink-4)}.bb-app .pp-qd-body{overscroll-behavior:contain;flex-direction:column;flex:1;gap:16px;padding:18px;display:flex;overflow-y:auto}.bb-app .pp-qd-meta-row{flex-wrap:wrap;align-items:center;gap:8px 10px;display:flex}.bb-app .pp-qd-marks{font-size:var(--rl-fs-micro);color:var(--bb-ok);background:color-mix(in oklab, var(--bb-ok), transparent 88%);border:1px solid color-mix(in oklab, var(--bb-ok), transparent 78%);border-radius:5px;padding:3px 9px;font-weight:600}.bb-app .pp-qd-topic{font-size:var(--rl-fs-micro);color:var(--bb-ink-3)}.bb-app .pp-qd-figure{border:1px solid var(--bb-line);background:#fff;border-radius:9px;margin:0;overflow:hidden}.bb-app .pp-qd-figure img{width:100%;display:block}.bb-app .pp-qd-resources{flex-wrap:wrap;gap:6px;display:flex}.bb-app .pp-qd-scheme{border:1px solid var(--bb-line);background:var(--bb-surface-2);border-radius:9px;overflow:hidden}.bb-app .pp-qd-scheme-head{width:100%;font-size:var(--rl-fs-12-5);color:var(--bb-ink);text-align:left;background:0 0;border:none;justify-content:space-between;align-items:center;padding:12px 14px;font-weight:600;display:flex}.bb-app .pp-qd-scheme-head svg{color:var(--bb-ink-4);transition:transform .16s}.bb-app .pp-qd-scheme-body{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);align-items:baseline;gap:8px;padding:0 14px 14px;line-height:1.5;display:flex}.bb-app .pp-qd-foot{border-top:1px solid var(--bb-line);background:var(--bb-surface-2);align-items:center;gap:10px;padding:12px 18px;display:flex}.bb-app .pp-qd-btn{border-radius:var(--rl-radius-md);border:1px solid var(--bb-line);background:var(--bb-surface);height:38px;color:var(--bb-ink-2);font-size:var(--rl-fs-12-5);align-items:center;gap:7px;padding:0 14px;font-weight:500;display:inline-flex}.bb-app .pp-qd-btn:hover:not(:disabled){color:var(--bb-ink);border-color:var(--bb-ink-4)}.bb-app .pp-qd-btn:disabled{opacity:.4;cursor:not-allowed}.bb-app .pp-qd-count{text-align:center;font-size:var(--rl-fs-micro);color:var(--bb-ink-3);flex:1}@media (max-width:600px){.bb-app .pp-qd{border-left:none;border-top:1px solid var(--bb-line);border-radius:16px 16px 0 0;width:100vw;height:92dvh;top:auto}@keyframes pp-qd-slide{0%{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}}@media (prefers-reduced-motion:reduce){.bb-app .pp-qd,.bb-app .pp-qd-scrim{animation:.12s both pp-qd-fade}}.bb-app .pp-card-view:focus-visible,.bb-app .topic-open:focus-visible,.bb-app .pp-qd-close:focus-visible,.bb-app .pp-qd-btn:focus-visible,.bb-app .pp-qd-scheme-head:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.bb-app .funnel-note{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);flex-wrap:wrap;align-items:center;gap:8px;margin:-6px 0 14px;padding:0;list-style:none;display:flex}.bb-app .funnel-step{align-items:center;gap:8px;display:inline-flex}.bb-app .funnel-step:not(:last-child):after{content:"→";content:"→" / "";color:var(--bb-ink-4)}.bb-app .funnel-step-dot{width:18px;height:18px;font-family:var(--font-plex-mono), monospace;background:var(--bb-accent);color:#fff;border-radius:50%;place-items:center;font-size:9px;font-weight:600;display:grid}html.dark .bb-app .funnel-step-dot{color:var(--bb-paper)}.bb-app .funnel-step-current{color:var(--bb-ink-2);font-weight:500}.bb-app .funnel-step-link{border-bottom:1px dashed var(--bb-line);align-items:baseline;gap:6px;text-decoration:none;display:inline-flex}.bb-app .funnel-step-link:hover{color:var(--bb-accent);border-bottom-color:var(--bb-accent-line)}.bb-app .funnel-step-change{font-size:var(--rl-fs-10-5);color:var(--bb-ink-3);text-transform:lowercase}.bb-app .funnel-step-link:hover .funnel-step-change{color:var(--bb-accent)}.bb-app .funnel-bar{z-index:5;background:var(--bb-paper);flex-wrap:wrap;align-items:center;gap:10px 12px;margin-bottom:14px;padding:10px 0;display:flex;position:sticky;top:56px}.bb-app .funnel-bar .search{flex:220px;min-width:180px}.bb-app .funnel-bar .result-count{margin-left:auto}.bb-app .funnel-bar .search.search-collapsible{cursor:pointer;flex:none;justify-content:center;width:36px;min-width:0;padding:0;transition:width .18s,border-color .15s;overflow:hidden}.bb-app .funnel-bar .search.search-collapsible:focus-within,.bb-app .funnel-bar .search.search-collapsible.has-query{cursor:text;justify-content:flex-start;width:min(280px,100%);padding:0 12px}.bb-app .search-collapsible .search-input,.bb-app .search-collapsible .search-clear{opacity:0;pointer-events:none;flex:none;width:0;padding:0}.bb-app .search-collapsible:focus-within .search-input,.bb-app .search-collapsible.has-query .search-input{opacity:1;pointer-events:auto;flex:auto;width:auto}.bb-app .search-collapsible:focus-within .search-clear,.bb-app .search-collapsible.has-query .search-clear{opacity:1;pointer-events:auto;width:auto;padding:4px}@media (prefers-reduced-motion:reduce){.bb-app .funnel-bar .search.search-collapsible{transition:none}}.bb-app .funnel-field{align-items:center;gap:8px;display:inline-flex}.bb-app .funnel-field-label{font-family:var(--font-plex-mono), monospace;letter-spacing:.08em;text-transform:uppercase;color:var(--bb-ink-3);white-space:nowrap;font-size:10px}.bb-app .funnel-select{border:1px solid var(--bb-line);background:var(--bb-surface);min-width:0;height:36px;color:var(--bb-ink);font-size:var(--rl-fs-12-5);border-radius:7px;padding:0 8px}.bb-app .funnel-select:hover{border-color:var(--bb-ink-4)}.bb-app .funnel-field-scope{color:var(--bb-ink-3);text-transform:none}.bb-app .funnel-select:focus-visible,.bb-app .funnel-bar .tier-tab:focus-visible,.bb-app .funnel-bar .search-clear:focus-visible,.bb-app .funnel-grid .topic-check:focus-visible,.bb-app .funnel-grid .bulk-btn:focus-visible,.bb-app .funnel-grid .toc-remove:focus-visible,.bb-app .funnel-grid .link-btn:focus-visible,.bb-app .funnel-grid .generate:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.bb-app .funnel-bar .search:focus-within{border-color:var(--bb-accent)}.bb-app .funnel-grid .funnel-library{flex-direction:column;gap:16px;min-width:0;display:flex}.bb-app .funnel-grid .topic-badges{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px 6px;display:inline-flex}.bb-app .funnel-grid .topic-qcount{font-family:var(--font-plex-mono), monospace;font-size:var(--rl-fs-micro);color:var(--bb-ink-3);font-feature-settings:"tnum" 1;white-space:nowrap}@media (min-width:1181px){.bb-app .funnel-grid .topic{grid-template-columns:22px 40px minmax(8rem,1fr) auto}.bb-app .funnel-grid .library-dense .topic{container-type:inline-size}@container (max-width:560px){.bb-app .funnel-grid .library-dense .topic{grid-template-rows:auto auto;grid-template-columns:22px 40px minmax(8rem,1fr);row-gap:4px}.bb-app .funnel-grid .library-dense .topic-badges{grid-area:2/3;justify-content:flex-start}}}.bb-app .funnel-grid .toc-empty{flex-direction:column;align-items:center;display:flex}.bb-app .funnel-grid .toc-empty-icon{order:-1}.bb-app .funnel-grid .toc-empty-title,.bb-app .funnel-grid .toc-empty-body{display:none}.bb-app .funnel-grid .toc-empty:before{content:"Your pack is empty";font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);margin-bottom:2px;font-size:16px}.bb-app .funnel-grid .toc-empty:after{content:"Pick topics from the funnel to add them here.";font-size:var(--rl-fs-11-5);color:var(--bb-ink-3)}@media (max-width:1180px){.bb-app .funnel-grid>.funnel-library{order:1}}@media (max-width:720px){.bb-app .funnel-bar{padding:0;position:static}.bb-app .funnel-bar .search,.bb-app .funnel-select,.bb-app .funnel-bar .tier-tabs{height:44px}.bb-app .funnel-bar .search.search-collapsible{width:44px}.bb-app .funnel-bar .search.search-collapsible:focus-within,.bb-app .funnel-bar .search.search-collapsible.has-query{width:100%}.bb-app .funnel-bar .tier-tab{min-width:44px;height:36px}.bb-app .funnel-field{flex:auto}.bb-app .funnel-field .funnel-select,.bb-app .funnel-field .tier-tabs{flex:1}.bb-app .funnel-grid .topic{min-height:44px}.bb-app .funnel-grid .topic-check{width:22px;height:22px}}.bb-app .ppf-section{margin-bottom:40px}.bb-app .ppf-section+.ppf-section{border-top:1px solid var(--bb-line);padding-top:28px}.bb-app .ppf-head{margin-bottom:16px}.bb-app .ppf-title{font-size:var(--rl-fs-h2);color:var(--bb-ink);margin:0 0 6px;line-height:1.15}.bb-app .ppf-sub{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);max-width:620px;margin:0 0 8px;line-height:1.55}.bb-app .ppf-meta{letter-spacing:.08em;text-transform:uppercase;color:var(--bb-ink-3);font-size:10px}.bb-app .ppf-tbd{border:1px dashed var(--bb-line);background:var(--bb-surface-2);border-radius:10px;flex-direction:column;align-items:flex-start;gap:8px;padding:26px 24px;display:flex}.bb-app .ppf-tbd strong{font-size:var(--rl-fs-ui);color:var(--bb-ink)}.bb-app .ppf-tbd p{font-size:var(--rl-fs-12-5);color:var(--bb-ink-3);max-width:520px;margin:0;line-height:1.55}.bb-app .rl-flashcards{--card:var(--bb-surface);--ink:var(--bb-ink);--ink-soft:var(--bb-ink-3);--border:var(--bb-line);--accent:var(--bb-accent);--on-accent:#fff;--track:var(--bb-surface-2);--shadow:#0000001a;--diff-hard:var(--bb-bad);--diff-hard-bg:var(--bb-bad-soft);--diff-med:var(--bb-warn);--diff-med-bg:var(--bb-warn-soft);--diff-easy:var(--bb-ok);--diff-easy-bg:var(--bb-accent-soft);--font-head:var(--font-newsreader), Georgia, serif;--font-body:var(--font-plex-sans), system-ui, sans-serif;--font-mono:var(--font-plex-mono), ui-monospace, monospace;flex-direction:column;display:flex}html.dark .bb-app .rl-flashcards{--shadow:#00000073}.bb-app .rl-flashcards .fc-toolbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:12px;display:flex}.bb-app .rl-flashcards .fc-count{opacity:.65;margin-left:6px;font-size:10px}.bb-app .rl-flashcards .fc-statusbar{flex-wrap:wrap;align-items:center;gap:14px;padding:2px 2px 0;display:flex}.bb-app .rl-flashcards .fc-priority summary{cursor:pointer;font-size:var(--rl-fs-micro);text-transform:uppercase;letter-spacing:.08em;color:var(--bb-ink-3);border:1px solid var(--bb-line);background:var(--bb-surface);border-radius:7px;padding:7px 12px;font-weight:600;list-style:none}.bb-app .rl-flashcards .fc-priority summary::-webkit-details-marker{display:none}.bb-app .rl-flashcards .fc-priority[open] summary{color:var(--bb-accent)}.bb-app .rl-flashcards .fc-priority{position:relative}.bb-app .rl-flashcards .fc-priority-panel{z-index:20;background:var(--bb-surface);border:1px solid var(--bb-line);box-shadow:var(--bb-shadow-md);border-radius:9px;min-width:260px;padding:12px 14px;position:absolute;top:calc(100% + 6px);right:0}@media (prefers-reduced-motion:reduce){.bb-app .rl-flashcards *,.bb-app .rl-flashcards :before,.bb-app .rl-flashcards :after{transition-duration:.01ms!important;animation-duration:.01ms!important}}.bb-app .fc-deck-groups{flex-direction:column;display:flex}.bb-app .fc-deck-group+.fc-deck-group{margin-top:10px}.bb-app .fc-deck-group-heading{font-size:var(--rl-fs-10-5);text-transform:uppercase;letter-spacing:.08em;color:var(--bb-ink-3);padding:8px 2px 4px;font-weight:600}.bb-app .fc-deck-group-list{flex-direction:column;display:flex}.bb-app .toc-pick{color:var(--bb-ink-3);border-radius:var(--rl-radius-xs);background:0 0;border:none;place-items:center;padding:4px;display:grid}.bb-app .toc-pick:hover{color:var(--bb-accent);background:var(--bb-accent-soft)}.bb-app .toc-pick.is-custom{color:var(--bb-accent)}.bb-app .ppq-overlay{z-index:110;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#16140f73;justify-content:center;align-items:center;padding:18px;display:flex;position:fixed;inset:0}.bb-app .ppq-modal{background:var(--bb-surface);border:1px solid var(--bb-line);border-radius:var(--rl-radius-lg);width:min(1080px,100%);max-height:min(88dvh,900px);box-shadow:var(--bb-shadow-md);flex-direction:column;display:flex;overflow:hidden}.bb-app .ppq-head{border-bottom:1px solid var(--bb-line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;display:flex}.bb-app .ppq-title{font-family:var(--font-newsreader), Georgia, serif;font-size:var(--rl-fs-h4);color:var(--bb-ink)}.bb-app .ppq-title-id{font-size:var(--rl-fs-label);color:var(--bb-accent);margin-right:8px}.bb-app .ppq-sub{font-size:var(--rl-fs-micro);color:var(--bb-ink-2);margin-top:3px}.bb-app .ppq-auto-note{font-size:var(--rl-fs-micro);color:var(--bb-ink-3);max-width:46ch;margin-top:3px}.bb-app .ppq-head-tools{align-items:center;gap:6px;display:flex}.bb-app .ppq-tool{border:1px solid var(--bb-line);font-size:var(--rl-fs-label);color:var(--bb-ink-2);background:0 0;border-radius:7px;padding:6px 10px}.bb-app .ppq-tool:hover{color:var(--bb-ink);border-color:var(--bb-ink-4)}.bb-app .ppq-close{color:var(--bb-ink-4);border-radius:var(--rl-radius-sm);background:0 0;border:none;place-items:center;padding:6px;display:grid}.bb-app .ppq-close:hover{color:var(--bb-bad);background:var(--bb-bad-soft)}.bb-app .ppq-body{background:var(--bb-surface-2);padding:16px 18px;overflow-y:auto}.bb-app .ppq-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px;display:grid}.bb-app .ppq-card-wrap{position:relative}.bb-app .ppq-card{border:2px solid var(--bb-line);text-align:left;cursor:pointer;background:#fff;border-radius:9px;width:100%;padding:0;display:block;overflow:hidden}.bb-app .ppq-card:hover{border-color:var(--bb-ink-4)}.bb-app .ppq-card.is-on{border-color:var(--bb-accent);box-shadow:0 0 0 2px var(--bb-accent-soft)}.bb-app .ppq-card-thumb{aspect-ratio:3/4;background:var(--bb-surface-2);display:block;position:relative;overflow:hidden}.bb-app .ppq-card-thumb:not(.is-loaded):not(.is-broken):before{content:"";background:linear-gradient(100deg, transparent 30%, var(--bb-line) 50%, transparent 70%);background-size:200% 100%;animation:1.4s ease-in-out infinite ppq-shimmer;position:absolute;inset:0}@keyframes ppq-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.bb-app .ppq-card-img{-o-object-fit:cover;object-fit:cover;-o-object-position:top;object-position:top;opacity:0;filter:grayscale(60%);width:100%;height:100%;transition:opacity .15s,filter .15s;display:block;position:absolute;inset:0}.bb-app .ppq-card-img.is-loaded{opacity:.78}.bb-app .ppq-card.is-on .ppq-card-img.is-loaded{opacity:1;filter:none}.bb-app .ppq-card-broken{text-align:center;font-size:var(--rl-fs-micro);color:var(--bb-ink-3);background:var(--bb-surface-2);flex-direction:column;justify-content:center;align-items:center;gap:6px;padding:12px;display:flex;position:absolute;inset:0}.bb-app .ppq-card-cap{font-size:var(--rl-fs-micro);color:var(--bb-ink-2);background:var(--bb-surface);border-top:1px solid var(--bb-line);justify-content:space-between;align-items:center;gap:8px;padding:7px 10px;display:flex}.bb-app .ppq-card-checkbox{border:1.5px solid var(--bb-ink-4);border-radius:var(--rl-radius-xs);color:#0000;background:var(--bb-surface);flex:none;place-items:center;width:16px;height:16px;display:grid}.bb-app .ppq-card.is-on .ppq-card-checkbox{background:var(--bb-accent);border-color:var(--bb-accent);color:#fff}html.dark .bb-app .ppq-card.is-on .ppq-card-checkbox{color:var(--bb-paper)}.bb-app .ppq-card-src{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.bb-app .ppq-card-marks{color:var(--bb-ink);flex:none}.bb-app .ppq-card-zoom{z-index:1;border:1px solid var(--bb-line);background:var(--bb-surface);width:24px;height:24px;color:var(--bb-ink-3);border-radius:50%;place-items:center;display:grid;position:absolute;top:8px;right:8px}.bb-app .ppq-card-zoom:hover{color:var(--bb-ink);border-color:var(--bb-ink-4)}.bb-app .ppq-foot{border-top:1px solid var(--bb-line);align-items:center;gap:8px;padding:12px 18px;display:flex}.bb-app .ppq-foot-spacer{flex:1}.bb-app .ppq-foot-hint{font-size:var(--rl-fs-micro);color:var(--bb-ink-3)}.bb-app .ppq-cancel{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);font-size:var(--rl-fs-meta);color:var(--bb-ink-2);background:0 0;padding:8px 14px}.bb-app .ppq-cancel:hover{color:var(--bb-ink);border-color:var(--bb-ink-4)}.bb-app .ppq-save{border-radius:var(--rl-radius-md);background:var(--bb-accent);color:#fff;font-size:var(--rl-fs-meta);border:none;padding:8px 16px;font-weight:600}html.dark .bb-app .ppq-save{color:var(--bb-paper)}.bb-app .ppq-save:hover{filter:brightness(1.05)}.bb-app .ppq-save:disabled{opacity:.5;cursor:not-allowed}.bb-app .ppq-zoom-overlay{z-index:120;background:#16140f99;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.bb-app .ppq-zoom-panel{max-width:min(720px,92vw);max-height:92dvh;box-shadow:var(--bb-shadow-md);background:#fff;border-radius:10px;position:relative;overflow:auto}.bb-app .ppq-zoom-img{width:100%;height:auto;display:block}.bb-app .ppq-zoom-cap{font-size:var(--rl-fs-11-5);color:var(--bb-ink-2);background:var(--bb-surface);border-top:1px solid var(--bb-line);padding:8px 12px}.bb-app .ppq-zoom-close{z-index:1;border:1px solid var(--bb-line);background:var(--bb-surface);width:28px;height:28px;color:var(--bb-ink-3);border-radius:50%;place-items:center;display:grid;position:absolute;top:8px;right:8px}.bb-app .ppq-zoom-close:hover{color:var(--bb-bad);background:var(--bb-bad-soft)}@media (max-width:640px){.bb-app .ppq-overlay{padding:10px}.bb-app .ppq-modal{max-height:94dvh}.bb-app .ppq-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}}@media (prefers-reduced-motion:reduce){.bb-app .ppq-overlay *,.bb-app .ppq-overlay :before,.bb-app .ppq-overlay :after,.bb-app .ppq-zoom-overlay *,.bb-app .ppq-zoom-overlay :before,.bb-app .ppq-zoom-overlay :after{transition-duration:.01ms!important;animation-duration:.01ms!important}}.bb-app .dp-btn{height:var(--rl-btn-sm-height);padding:0 var(--rl-btn-sm-pad-x);border-radius:var(--rl-btn-sm-radius);font-size:var(--rl-btn-sm-fs);font-weight:var(--rl-btn-sm-weight);white-space:nowrap;align-items:center;gap:6px;text-decoration:none;transition:border-color 80ms,color 80ms,filter 80ms;display:inline-flex}.bb-app .dp-btn-primary{border:1px solid var(--bb-accent);background:var(--bb-accent);color:#fff}html.dark .bb-app .dp-btn-primary{color:var(--bb-paper)}.bb-app .dp-btn-primary:hover{filter:brightness(1.05)}.bb-app .dp-btn-ghost{border:1px solid var(--bb-line);background:var(--bb-surface);color:var(--bb-ink-2)}.bb-app .dp-btn-ghost:hover{border-color:var(--bb-accent-line);color:var(--bb-accent)}.bb-app .dp-subjects{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;margin-bottom:30px;display:grid}.bb-app .dp-subject{border:1px solid var(--bb-line);background:var(--bb-surface);box-shadow:var(--bb-shadow-sm);border-radius:10px;flex-direction:column;gap:8px;padding:16px 17px;text-decoration:none;transition:border-color 80ms,transform 80ms;display:flex}a.dp-subject:hover{border-color:var(--bb-accent-line)}.bb-app .dp-subject.is-soon{background:var(--bb-surface-2);box-shadow:none}.bb-app .dp-subject-head{justify-content:space-between;align-items:center;gap:8px;display:flex}.bb-app .dp-subject-title{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);letter-spacing:-.012em;margin:0;font-size:21px}.bb-app .dp-subject.is-soon .dp-subject-title{color:var(--bb-ink-3)}.bb-app .dp-subject-flag{letter-spacing:.06em;text-transform:uppercase;border:1px solid var(--bb-line);color:var(--bb-ink-3);white-space:nowrap;border-radius:5px;padding:2px 7px;font-size:10px}.bb-app .dp-subject-flag.is-live{border-color:var(--bb-accent-line);color:var(--bb-accent);background:var(--bb-accent-soft)}.bb-app .dp-subject-blurb{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);margin:0;line-height:1.5}.bb-app .dp-subject.is-soon .dp-subject-blurb{color:var(--bb-ink-3)}.bb-app .dp-subject-go{font-size:var(--rl-fs-label);color:var(--bb-accent);margin-top:auto;padding-top:8px;font-weight:500}@media (max-width:640px){.bb-app .dp-subjects{grid-template-columns:1fr}}.bb-app .dp-tier-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;margin-bottom:30px;display:grid}.bb-app .dp-tier-card{border:1px solid var(--bb-line);background:var(--bb-surface);box-shadow:var(--bb-shadow-sm);border-radius:10px;flex-direction:column;gap:8px;padding:16px 17px;display:flex}.bb-app .dp-tier-head{justify-content:space-between;align-items:center;gap:8px;display:flex}.bb-app .dp-tier-badge{letter-spacing:.06em;text-transform:uppercase;border:1px solid var(--bb-accent-line);color:var(--bb-accent);background:var(--bb-accent-soft);border-radius:5px;padding:2px 7px;font-size:10px}.bb-app .dp-tier-pool{font-size:var(--rl-fs-10-5);color:var(--bb-ink-3)}.bb-app .dp-tier-title{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);letter-spacing:-.012em;margin:2px 0 0;font-size:21px}.bb-app .dp-tier-desc{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);margin:0;line-height:1.5}.bb-app .dp-tier-preview{font-size:var(--rl-fs-label);color:var(--bb-ink-2);background:var(--bb-surface-2);border:1px solid var(--bb-line-2);border-radius:7px;flex-direction:column;gap:2px;margin:2px 0 0;padding:8px 10px;display:flex}.bb-app .dp-tier-preview span:first-child{letter-spacing:.1em;text-transform:uppercase;color:var(--bb-ink-3);font-size:9.5px}.bb-app .dp-tier-actions{flex-wrap:wrap;gap:8px;margin-top:6px;display:flex}.bb-app .dp-archive{margin-top:8px}.bb-app .dp-archive-head{margin-bottom:12px}.bb-app .dp-archive-head h2{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);margin:0 0 3px;font-size:19px}.bb-app .dp-archive-head p{font-size:var(--rl-fs-12-5);color:var(--bb-ink-3);margin:0}.bb-app .dp-archive-list{flex-direction:column;gap:6px;display:flex}.bb-app .dp-archive-row{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:9px 12px;display:flex}.bb-app .dp-archive-date{font-size:var(--rl-fs-12-5);color:var(--bb-ink)}.bb-app .dp-archive-links{flex-wrap:wrap;gap:6px;display:flex}.bb-app .dp-chip{font-size:var(--rl-fs-micro);border:1px solid var(--bb-line);border-radius:var(--rl-radius-sm);color:var(--bb-ink-2);background:var(--bb-surface);align-items:center;padding:4px 9px;text-decoration:none;transition:border-color 80ms,color 80ms,background 80ms;display:inline-flex}.bb-app .dp-chip:hover{border-color:var(--bb-accent-line);color:var(--bb-accent)}.bb-app .dp-chip.is-active{border-color:var(--bb-accent);background:var(--bb-accent);color:#fff}html.dark .bb-app .dp-chip.is-active{color:var(--bb-paper)}.bb-app .dp-archive-chips{flex-wrap:wrap;gap:7px;display:flex}.bb-app .dp-sheet{max-width:760px}.bb-app .dp-sheet-head{border-bottom:1px solid var(--bb-line);flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:18px;padding-bottom:16px;display:flex}.bb-app .dp-back{font-size:var(--rl-fs-label);color:var(--bb-ink-3);align-items:center;gap:5px;margin-bottom:6px;text-decoration:none;display:inline-flex}.bb-app .dp-back:hover{color:var(--bb-accent)}.bb-app .main>.dp-back{margin-bottom:14px;display:inline-flex}.bb-app .dp-empty{max-width:var(--rl-width-prose);color:var(--bb-ink-2);font-size:var(--rl-fs-body);margin:0}.bb-app .dp-sheet-date{font-family:var(--font-newsreader), Georgia, serif;font-size:var(--rl-fs-h2);color:var(--bb-ink);margin:0}.bb-app .dp-q-list{flex-direction:column;gap:10px;margin:0 0 16px;padding:0;list-style:none;display:flex}.bb-app .dp-q{border:1px solid var(--bb-line);background:var(--bb-surface);box-shadow:var(--bb-shadow-sm);border-radius:10px;align-items:flex-start;gap:12px;padding:14px 16px;display:flex}.bb-app .dp-q-num{width:26px;height:26px;font-size:var(--rl-fs-label);border:1px solid var(--bb-accent-line);color:var(--bb-accent);background:var(--bb-accent-soft);border-radius:50%;flex:none;place-items:center;font-weight:600;display:grid}.bb-app .dp-q-body{flex-direction:column;gap:5px;min-width:0;display:flex}.bb-app .dp-q-category{letter-spacing:.1em;text-transform:uppercase;color:var(--bb-ink-3);font-size:9.5px}.bb-app .dp-q-prompt{font-size:var(--rl-fs-ui);color:var(--bb-ink);margin:0;line-height:1.45}.bb-app .dp-q-answer{background:var(--bb-accent-soft);border-radius:7px;align-items:baseline;gap:8px;margin:4px 0 0;padding:7px 10px;display:flex}.bb-app .dp-q-answer-label{letter-spacing:.06em;text-transform:uppercase;color:var(--bb-accent);flex:none;font-size:9.5px;font-weight:700}.bb-app .dp-q-answer-val{font-size:var(--rl-fs-meta);color:var(--bb-ink);font-weight:600}.bb-app .dp-reveal{margin-bottom:26px}.bb-app .dp-sheet-meta{font-size:var(--rl-fs-label);color:var(--bb-ink-3);margin:5px 0 0}.bb-app .dp-q-category{align-items:baseline;gap:8px;display:flex}.bb-app .dp-q-marks{color:var(--bb-ink-3);opacity:.85}.bb-app .dp-q-answer{flex-wrap:wrap}.bb-app .dp-q-working{font-size:var(--rl-fs-label);color:var(--bb-ink-2);flex-basis:100%;font-style:italic;line-height:1.45}.bb-app .dp-batch{border:1px solid var(--bb-accent-line);background:var(--bb-accent-soft);border-radius:10px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:18px;margin-bottom:30px;padding:16px 18px;display:flex}.bb-app .dp-batch-copy{flex:320px;min-width:0}.bb-app .dp-batch-copy h3{font-family:var(--font-newsreader), Georgia, serif;font-size:var(--rl-fs-lead);color:var(--bb-ink);margin:0 0 4px}.bb-app .dp-batch-copy p{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);margin:0;line-height:1.5}.bb-app .dp-batch .dp-tier-actions{margin-top:0}.bb-app .dp-month-list{flex-direction:column;gap:6px;margin:0;padding:0;list-style:none;display:flex}.bb-app .dp-month-row{margin:0}.bb-app .dp-month-link{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface);flex-wrap:wrap;align-items:baseline;gap:12px;padding:10px 13px;text-decoration:none;transition:border-color 80ms,background 80ms;display:flex}.bb-app .dp-month-link:hover{border-color:var(--bb-accent-line);background:var(--bb-surface-2)}.bb-app .dp-month-date{font-size:var(--rl-fs-12-5);color:var(--bb-ink);flex:none;min-width:148px;font-weight:600}.bb-app .dp-month-preview{font-size:var(--rl-fs-label);color:var(--bb-ink-3);text-overflow:ellipsis;white-space:nowrap;flex:200px;min-width:0;line-height:1.45;overflow:hidden}.bb-app .dp-month-nav{justify-content:space-between;gap:10px;margin:18px 0 30px;display:flex}@media (max-width:640px){.bb-app .dp-tier-grid{grid-template-columns:1fr}.bb-app .dp-sheet-head{flex-direction:column;align-items:stretch}.bb-app .dp-month-date{min-width:0}.bb-app .dp-month-preview{white-space:normal}}.bb-app .ppa-links{flex-wrap:wrap;gap:8px;margin-top:2px;display:flex}.bb-app .ppa-link{border:1px solid var(--bb-line);background:var(--bb-surface);color:var(--bb-ink-2);font-size:var(--rl-fs-label);border-radius:7px;align-items:center;gap:5px;padding:6px 11px;font-weight:600;line-height:1.3;text-decoration:none;transition:border-color .12s,color .12s;display:inline-flex}.bb-app .ppa-link:hover{color:var(--bb-accent);border-color:var(--bb-accent-line)}.bb-app .pp-hub-links{margin:2px 0 20px}.dlg-scrim{z-index:200;background:color-mix(in oklab, var(--bb-ink), transparent 45%);place-items:center;padding:20px;animation:.16s both dlg-fade;display:grid;position:fixed;inset:0}@keyframes dlg-fade{0%{opacity:0}to{opacity:1}}.dlg-panel{border:1px solid var(--bb-line);border-radius:var(--rl-radius-lg);background:var(--bb-surface);width:min(460px,100%);max-height:calc(100dvh - 40px);font-family:var(--font-plex-sans), system-ui, sans-serif;padding:30px 30px 26px;animation:.22s both dlg-rise;position:relative;overflow-y:auto;box-shadow:0 30px 60px -22px #16140f80}.dlg-panel:before{content:"";background:var(--bb-accent-2);border-radius:12px 0 0 12px;width:5px;position:absolute;top:0;bottom:0;left:0}@keyframes dlg-rise{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.dlg-panel:focus{outline:none}.dlg-panel:focus-visible{outline:2px solid var(--bb-accent);outline-offset:3px}.dlg-panel-static{max-height:none;margin:0 auto;animation:none}.dlg-page{max-width:520px}.dlg-page-aside{text-align:center;font-size:var(--rl-fs-13-5);color:var(--bb-ink-2);margin:18px 0 0}.dlg-close{border-radius:var(--rl-radius-md);width:30px;height:30px;color:var(--bb-ink-2);cursor:pointer;background:0 0;border:1px solid #0000;place-items:center;display:grid;position:absolute;top:12px;right:12px}.dlg-close:hover{color:var(--bb-ink);border-color:var(--bb-line)}.dlg-close:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.dlg-title{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);margin:0 0 8px;font-size:22px;font-weight:500;line-height:1.25}.dlg-lede{font-size:var(--rl-fs-14-5);color:var(--bb-ink-2);margin:0 0 18px;line-height:1.6}.dlg-form{flex-direction:column;gap:9px;display:flex}.dlg-label{font-size:var(--rl-fs-form-label);font-weight:var(--rl-weight-form-label);letter-spacing:.02em;color:var(--bb-ink)}.dlg-input{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-paper);width:100%;color:var(--bb-ink);font:inherit;padding:11px 12px;font-size:16px}.dlg-input:focus-visible{outline:2px solid var(--bb-accent);outline-offset:1px}.dlg-input[aria-invalid=true]{border-color:var(--bb-bad)}.dlg-check{font-size:var(--rl-fs-meta);color:var(--bb-ink-2);cursor:pointer;align-items:flex-start;gap:9px;margin-top:3px;line-height:1.5;display:flex}.dlg-check input{accent-color:var(--bb-accent-2);flex:none;margin-top:2px}.dlg-submit{border-radius:var(--rl-radius-md);background:var(--bb-accent);color:#fff;min-height:44px;font:inherit;font-size:var(--rl-fs-14-5);cursor:pointer;border:1px solid #0000;justify-content:center;align-items:center;margin-top:6px;padding:12px 18px;font-weight:500;display:inline-flex}.dlg-submit:hover:not(:disabled){background:color-mix(in oklab, var(--bb-accent) 88%, #000)}.dlg-submit:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.dlg-submit:disabled{opacity:.6;cursor:default}html.dark .dlg-submit{color:#10150d}html.dark .dlg-submit:hover:not(:disabled){background:color-mix(in oklab, var(--bb-accent) 88%, #fff)}.dlg-error{font-size:var(--rl-fs-meta);color:var(--bb-bad);margin:2px 0 0;line-height:1.5}.dlg-fine{font-size:var(--rl-fs-label);color:var(--bb-ink-2);margin:10px 0 0;line-height:1.55}.dlg-fine a{color:var(--bb-accent);text-underline-offset:2px}@media (max-width:480px){.dlg-panel{padding:26px 20px 22px}.dlg-title{font-size:var(--rl-fs-h3)}}@media (prefers-reduced-motion:reduce){.dlg-scrim,.dlg-panel{animation:none}}.trq-title{font-family:var(--font-newsreader), Georgia, serif;font-size:var(--rl-fs-h3);color:var(--bb-ink);margin:0 0 6px;font-weight:500;line-height:1.3}.trq-lede{font-size:var(--rl-fs-ui);color:var(--bb-ink-2);margin:0 0 16px;line-height:1.6}.trq-form{font-family:var(--font-plex-sans), system-ui, sans-serif;text-align:left;flex-direction:column;gap:14px;display:flex}.trq-form-compact{gap:11px}.trq-field{flex-direction:column;gap:5px;display:flex}.trq-label{font-size:var(--rl-fs-12-5);letter-spacing:.02em;color:var(--bb-ink);font-weight:500}.trq-optional{font-weight:400;font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);margin-left:5px}.trq-input{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-paper);width:100%;color:var(--bb-ink);font:inherit;font-size:16px;font-family:var(--font-plex-sans), system-ui, sans-serif;padding:10px 12px}.trq-input::placeholder{color:var(--bb-ink-4)}.trq-input:focus-visible{outline:2px solid var(--bb-accent);outline-offset:1px}.trq-input[aria-invalid=true]{border-color:var(--bb-bad)}.trq-textarea{resize:vertical;min-height:76px;line-height:1.55}.trq-hint{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);margin:0}.trq-hp{width:1px;height:1px;position:absolute;left:-9999px;overflow:hidden}.trq-why{border-left:2px solid var(--bb-accent-line);font-size:var(--rl-fs-label);color:var(--bb-ink-3);margin:2px 0 0;padding-left:10px;line-height:1.55}.trq-why strong{color:var(--bb-ink-2);font-weight:600}.trq-error{font-size:var(--rl-fs-meta);color:var(--bb-bad);margin:0;line-height:1.5}.trq-submit{border:1px solid var(--bb-accent);border-radius:var(--rl-radius-md);background:var(--bb-accent);color:#fff;min-height:40px;font:inherit;font-family:var(--font-plex-sans), system-ui, sans-serif;font-size:var(--rl-fs-ui);cursor:pointer;align-self:flex-start;padding:10px 18px;font-weight:500}html.dark .trq-submit{color:var(--bb-paper)}.trq-submit:hover:not(:disabled){background:color-mix(in oklab, var(--bb-accent), black 8%)}.trq-submit:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.trq-submit:disabled{opacity:.6;cursor:default}.trq-fine{font-size:var(--rl-fs-label);color:var(--bb-ink-3);margin:0;line-height:1.55}.trq-fine a{color:var(--bb-accent);text-underline-offset:2px}.trq-done{border:1px solid var(--bb-accent-line);background:var(--bb-accent-soft);font-family:var(--font-plex-sans), system-ui, sans-serif;text-align:left;border-radius:10px;align-items:flex-start;gap:10px;padding:14px 16px;display:flex}.trq-done-mark{color:var(--bb-accent);flex:none;margin-top:1px}.trq-done-text{font-size:var(--rl-fs-ui);color:var(--bb-ink);margin:0;line-height:1.6}.trq-panel{border:1px solid var(--bb-line);border-radius:var(--rl-radius-lg);background:var(--bb-surface);margin:34px 0 0;padding:22px 24px}.trq-panel-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:18px;display:flex}.trq-panel-head:last-child .trq-lede{margin-bottom:0}.trq-trigger{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface-2);min-height:40px;color:var(--bb-ink);font-family:var(--font-plex-sans), system-ui, sans-serif;font-size:var(--rl-fs-ui);cursor:pointer;flex:none;padding:9px 16px;font-weight:500}.trq-trigger:hover{border-color:var(--bb-accent);color:var(--bb-accent)}.trq-trigger:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.bb-app .rail-foot-btn{border:1px solid var(--bb-line);border-radius:var(--rl-radius-sm);background:var(--bb-surface-2);width:100%;color:var(--bb-accent);font:inherit;font-size:var(--rl-fs-11-5);text-align:center;cursor:pointer;margin-top:8px;padding:7px 10px;font-weight:500;display:block}.bb-app .rail-foot-btn:hover{border-color:var(--bb-accent);background:var(--bb-accent-soft)}.bb-app .rail-foot-btn:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.trq-dialog{width:min(520px,100%)}@media (max-width:560px){.trq-panel{padding:18px 16px}.trq-submit{text-align:center;align-self:stretch}}.dlg-done-link{border-radius:var(--rl-radius-md);background:var(--bb-accent);color:#fff;font:inherit;font-size:var(--rl-fs-14-5);cursor:pointer;border:1px solid #0000;justify-content:center;align-items:center;margin-top:4px;padding:10px 18px;font-weight:500;text-decoration:none;display:inline-flex}.dlg-done-link:hover{background:color-mix(in oklab, var(--bb-accent) 88%, #000)}.dlg-done-link:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}html.dark .dlg-done-link{color:#10150d}html.dark .dlg-done-link:hover{background:color-mix(in oklab, var(--bb-accent) 88%, #fff)}.site .dlg-done-link{color:#fff}html.dark .site .dlg-done-link{color:#10150d}.shr{border-top:1px solid var(--bb-line);margin-top:22px;padding-top:18px}.shr-title{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);margin:0 0 6px;font-size:16px;font-weight:500;line-height:1.35}.shr-lede{font-size:var(--rl-fs-meta);color:var(--bb-ink-2);margin:0 0 14px;line-height:1.6}.shr-row{flex-wrap:wrap;gap:10px;margin:0;padding:0;list-style:none;display:flex}.shr-btn{width:var(--rl-btn-lg-height);height:var(--rl-btn-lg-height);border:1px solid var(--bb-line);background:var(--bb-surface);cursor:pointer;border-radius:10px;place-items:center;transition:background .15s,color .15s,border-color .15s,transform .15s;display:grid}.shr .shr-btn{color:var(--shr-brand)}.shr .shr-btn:hover,.shr .shr-btn:focus-visible{background:var(--shr-brand);border-color:var(--shr-brand);color:var(--shr-on-brand,#fff);transform:translateY(-1px)}.shr-btn:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.shr-btn:active{transform:translateY(0)}.shr-btn[disabled]{opacity:.5;cursor:default;transform:none}.shr-glyph{display:block}.shr-btn-facebook{--shr-brand:#1877f2}.shr-btn-instagram{--shr-brand:#e1306c}.shr-btn-x{--shr-brand:#0f1419}.shr-btn-linkedin{--shr-brand:#0a66c2}.shr-btn-whatsapp{--shr-brand:#25d366}.shr-btn-reddit{--shr-brand:#ff4500}html.dark .shr-btn-x{--shr-brand:#e7e9ea;--shr-on-brand:#0f1419}.shr-actions{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.shr-action{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);color:var(--bb-ink-2);font:inherit;font-size:var(--rl-fs-meta);cursor:pointer;background:0 0;align-items:center;gap:7px;padding:7px 12px;transition:color .12s,border-color .12s;display:inline-flex}.shr-action:hover{color:var(--bb-ink);border-color:var(--bb-accent)}.shr-action:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.shr-action[disabled]{opacity:.5;cursor:default}.shr-action.is-copied{border-color:var(--bb-ok);color:var(--bb-ok)}.shr-status{min-height:1.5em;font-size:var(--rl-fs-12-5);color:var(--bb-ok);margin:10px 0 0;line-height:1.5}.dlg-panel-static .shr-row{justify-content:center}@media (max-width:480px){.shr-row{gap:8px}.shr-btn{width:46px;height:46px}}@media (prefers-reduced-motion:reduce){.shr-btn{transition:none}.shr .shr-btn:hover,.shr .shr-btn:focus-visible{transform:none}}.shr-status-failed{color:var(--bb-bad)}.bb-app .pdp-caveat{border:1px solid color-mix(in oklab, var(--bb-warn), transparent 70%);background:var(--bb-warn-soft);border-radius:var(--rl-radius-md);align-items:flex-start;gap:10px;margin:18px 0 6px;padding:12px 14px;display:flex}.bb-app .pdp-caveat svg{color:var(--bb-warn);flex:none;margin-top:2px}.bb-app .pdp-caveat p{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);margin:0;line-height:1.55}.bb-app .pdp-caveat-more{margin-top:8px}.bb-app .pdp-caveat-more>summary{cursor:pointer;font-size:var(--rl-fs-11-5);color:var(--bb-ink-2);text-underline-offset:2px}.bb-app .pdp-caveat-more>summary:hover{text-decoration:underline}.bb-app .pdp-caveat-more>summary:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px;border-radius:var(--rl-radius-xs)}.bb-app .pdp-caveat-more p{margin-top:8px}.bb-app .pdp-picker{border:1px solid var(--bb-line);border-radius:var(--rl-radius-lg);background:var(--bb-surface);grid-template-columns:repeat(2,minmax(0,1fr));align-items:center;gap:10px 22px;margin:18px 0 12px;padding:12px 14px;display:grid}.bb-app .pdp-picker-group{align-items:center;gap:10px;min-width:0;display:flex}.bb-app .pdp-picker-label{width:52px;font-family:var(--font-plex-mono), ui-monospace, monospace;color:var(--bb-ink-3);text-transform:uppercase;letter-spacing:.07em;flex:none;font-size:10px}.bb-app .pdp-context{border-radius:0 var(--rl-radius-lg) var(--rl-radius-lg) 0;border-left:3px solid var(--bb-accent);background:var(--bb-surface-2);font-size:var(--rl-fs-label);color:var(--bb-ink-3);flex-wrap:wrap;align-items:baseline;gap:6px 20px;margin:0 0 12px;padding:11px 14px;line-height:1.6;display:flex}.bb-app .pdp-context-name{font-size:var(--rl-fs-meta);color:var(--bb-ink);font-weight:600}.bb-app .pdp-context-fact .mono{color:var(--bb-ink);font-weight:500}.bb-app .pdp-legend{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);flex-wrap:wrap;gap:8px 18px;margin:0 0 12px;display:flex}.bb-app .pdp-legend-item{align-items:center;gap:6px;display:inline-flex}.bb-app .pdp-table-card{border:1px solid var(--bb-line);border-radius:var(--rl-radius-lg);background:var(--bb-surface);margin:0 0 8px;overflow:clip}.bb-app .pdp-table{border-collapse:collapse;table-layout:auto;width:100%}.bb-app .pdp-table th,.bb-app .pdp-table td{text-align:left;vertical-align:middle;padding:0 6px;font-weight:400}.bb-app .pdp-table thead th{z-index:2;background:var(--bb-surface-2);border-bottom:1px solid var(--bb-line);font-family:var(--font-plex-mono), ui-monospace, monospace;letter-spacing:.08em;text-transform:uppercase;color:var(--bb-ink-3);height:30px;font-size:9.5px;position:sticky;top:56px}.bb-app .pdp-table tbody tr{border-bottom:1px solid var(--bb-line-2)}.bb-app .pdp-table tbody tr:last-child{border-bottom:none}.bb-app .pdp-row{height:46px}.bb-app .pdp-row:hover{background:var(--bb-surface-2)}.bb-app .pdp-table .pdp-c-rank{text-align:right;width:40px;color:var(--bb-ink-3);padding-left:14px;font-size:11px}.bb-app .pdp-table .pdp-c-code{width:76px;font-size:var(--rl-fs-11-5);color:var(--bb-ink-3)}.bb-app .pdp-table .pdp-c-topic{width:100%;color:var(--bb-ink);font-size:13px;font-weight:500}.bb-app .pdp-table .pdp-c-seen{text-align:right;width:104px;font-size:var(--rl-fs-11-5);color:var(--bb-ink-2)}.bb-app .pdp-table .pdp-c-avg{text-align:right;width:88px;font-size:var(--rl-fs-11-5);color:var(--bb-ink-2)}.bb-app .pdp-table .pdp-c-exp{text-align:right;width:100px;font-size:var(--rl-fs-11-5);color:var(--bb-ink-2)}.bb-app .pdp-table .pdp-c-rank,.bb-app .pdp-table .pdp-c-code,.bb-app .pdp-table .pdp-c-seen,.bb-app .pdp-table .pdp-c-avg,.bb-app .pdp-table .pdp-c-exp,.bb-app .pdp-table .pdp-c-act{white-space:nowrap}.bb-app .pdp-table .pdp-c-act{width:246px;padding-right:14px}.bb-app .pdp-unit{font-size:var(--rl-fs-10-5);color:var(--bb-ink-3)}.bb-app .pdp-band-row{background:var(--bb-surface-2)}.bb-app .pdp-table .pdp-band-head{border-top:1px solid var(--bb-line);padding:9px 14px}.bb-app .pdp-band-head-inner{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.bb-app .pdp-band-gloss{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3)}.bb-app .pdp-band-count{font-size:var(--rl-fs-10-5);color:var(--bb-ink-3);white-space:nowrap;margin-left:auto}.bb-app .pdp-table tbody:first-of-type .pdp-band-head{border-top:none}.bb-app .pdp-row-actions{justify-content:flex-end;gap:6px;display:flex}.bb-app .pdp-row-btn{border:1px solid var(--bb-line);background:var(--bb-surface);height:28px;color:var(--bb-ink-2);font-size:var(--rl-fs-11-5);white-space:nowrap;border-radius:7px;align-items:center;gap:5px;padding:0 10px;font-weight:500;text-decoration:none;transition:border-color .1s,color .1s,background .1s;display:inline-flex}.bb-app .pdp-row-btn:hover{border-color:var(--bb-accent-line);color:var(--bb-accent);background:var(--bb-accent-soft)}.bb-app .pdp-row-btn svg{flex:none}.bb-app .pdp-table-more{border:none;border-top:1px solid var(--bb-line);background:var(--bb-surface-2);width:100%;height:40px;color:var(--bb-ink-2);font-size:var(--rl-fs-12-5);justify-content:center;align-items:center;gap:7px;font-weight:500;display:flex}.bb-app .pdp-table-more:hover{color:var(--bb-accent)}.bb-app .pdp-paper{border:1px solid var(--bb-line);background:var(--bb-surface);border-radius:10px;margin:16px 0 18px;padding:16px 18px}.bb-app .pdp-paper-head h2{font-size:var(--rl-fs-14-5);color:var(--bb-ink);margin:0;font-weight:600}.bb-app .pdp-paper-head p{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);margin:6px 0 0;line-height:1.55}.bb-app .pdp-paper-facts{flex-wrap:wrap;gap:8px;margin:14px 0 0;display:flex}.bb-app .pdp-paper-facts>div{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface-2);flex-direction:column-reverse;gap:2px;min-width:86px;padding:8px 12px;display:flex}.bb-app .pdp-paper-facts dt{font-family:var(--font-plex-mono), ui-monospace, monospace;color:var(--bb-ink-3);text-transform:uppercase;letter-spacing:.08em;font-size:9px}.bb-app .pdp-paper-facts dd{color:var(--bb-ink);margin:0;font-size:15px;font-weight:500;line-height:1.1}.bb-app .pdp-paper-topics{color:var(--bb-ink-3);margin:12px 0 0;font-size:12px;line-height:1.55}.bb-app .pdp-paper-cta{border:1px solid var(--bb-accent);background:var(--bb-accent);color:var(--bb-paper);border-radius:8px;align-items:center;gap:8px;margin:14px 0 0;padding:9px 15px;font-size:13px;font-weight:500;text-decoration:none;transition:filter .12s;display:inline-flex}.bb-app .pdp-paper-cta:hover{filter:brightness(1.06)}.bb-app .pdp-paper-cta svg{flex:none}.bb-app .pdp-paper-note{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);margin:12px 0 0;line-height:1.55}.bb-app .pdp-method{border-top:1px solid var(--bb-line);margin:32px 0 8px;padding-top:20px}.bb-app .pdp-method h3{font-size:var(--rl-fs-ui);color:var(--bb-ink);margin:0 0 8px}.bb-app .pdp-method ul{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);margin:8px 0 0;padding-left:18px;line-height:1.6}.bb-app .pdp-method li+li{margin-top:6px}@media (max-width:1180px){.bb-app .pdp-table .pdp-c-seen,.bb-app .pdp-table .pdp-c-avg{display:none}}@media (max-width:860px){.bb-app .pdp-picker{grid-template-columns:1fr}}@media (max-width:760px){.bb-app .pdp-table .pdp-c-code{display:none}.bb-app .pdp-table .pdp-c-rank{width:26px;padding-left:10px}.bb-app .pdp-table .pdp-c-exp{width:58px}.bb-app .pdp-table .pdp-c-act{width:128px;padding-right:10px}.bb-app .pdp-row-btn{gap:4px;height:26px;padding:0 8px;font-size:11px}.bb-app .pdp-row-btn svg,.bb-app .pdp-c-exp .pdp-unit{display:none}.bb-app .pdp-row-actions{flex-direction:column;align-items:flex-end;gap:5px}.bb-app .pdp-row{height:auto}.bb-app .pdp-table tbody td,.bb-app .pdp-table tbody th{padding-top:9px;padding-bottom:9px}}.flc-wrap{right:22px;bottom:max(22px, var(--rlc-reserve,0px));z-index:160;width:min(360px,100vw - 32px);font-family:var(--font-plex-sans), system-ui, sans-serif;position:fixed}.flc-card{border-radius:var(--rl-radius-lg);border:1px solid var(--bb-line);background:color-mix(in oklab, var(--bb-surface), var(--bb-paper) 40%);max-height:calc(100dvh - 44px);padding:15px 16px 14px;animation:.26s both flc-rise;position:relative;overflow-y:auto;box-shadow:0 16px 36px -16px #16140f66,inset 0 1px #ffffff0d}@keyframes flc-rise{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.flc-close{width:24px;height:24px;color:var(--bb-ink-2);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:7px;place-items:center;padding:0;transition:color .12s,border-color .12s;display:grid;position:absolute;top:9px;right:9px}.flc-close:hover{color:var(--bb-ink);border-color:var(--bb-line)}.flc-close:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}@media (max-width:560px){.flc-wrap{left:16px;right:16px;bottom:max(16px, var(--rlc-reserve,0px));width:auto}}@media (prefers-reduced-motion:reduce){.flc-card{animation:none}}.eak-heading{font-family:var(--font-newsreader), Georgia, serif;color:var(--bb-ink);margin:0 26px 6px 0;font-size:16px;font-weight:500;line-height:1.35}.eak-lede{font-size:var(--rl-fs-meta);color:var(--bb-ink-2);margin:0 0 12px;line-height:1.55}.eak-form{display:block}.eak-label{font-size:var(--rl-fs-form-label);font-weight:var(--rl-weight-form-label);color:var(--bb-ink-2);margin:0 0 5px;display:block}.eak-optional{color:var(--bb-ink-3);font-weight:400}.eak-input{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface);width:100%;font:inherit;font-size:var(--rl-fs-13-5);color:var(--bb-ink);margin:0 0 11px;padding:8px 10px}.eak-input:focus-visible{outline:2px solid var(--bb-accent);outline-offset:1px}.eak-select{appearance:auto}.eak-check{font-size:var(--rl-fs-12-5);color:var(--bb-ink-2);cursor:pointer;align-items:flex-start;gap:8px;margin:0 0 12px;line-height:1.5;display:flex}.eak-check input{flex:none;margin-top:2px}.eak-error{font-size:var(--rl-fs-12-5);color:var(--bb-bad);margin:0 0 10px}.eak-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.eak-submit{border:1px solid var(--bb-accent);border-radius:var(--rl-radius-md);background:var(--bb-accent);font:inherit;font-size:var(--rl-fs-meta);color:var(--bb-paper);cursor:pointer;padding:7px 16px;font-weight:500;transition:filter .12s}.eak-submit:hover:not(:disabled){filter:brightness(1.06)}.eak-submit:disabled{opacity:.6;cursor:default}.eak-submit:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.eak-secondary{border-radius:var(--rl-radius-md);font:inherit;font-size:var(--rl-fs-meta);color:var(--bb-ink-2);cursor:pointer;background:0 0;border:1px solid #0000;padding:7px 12px;transition:color .12s,border-color .12s}.eak-secondary:hover{color:var(--bb-ink);border-color:var(--bb-line)}.eak-secondary:focus-visible{outline:2px solid var(--bb-accent);outline-offset:2px}.eak-fine{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);margin:11px 0 0;line-height:1.55}.eak-fine a{color:var(--bb-accent);text-underline-offset:2px}.dsc-eyebrow{font-size:var(--rl-fs-meta);color:var(--bb-ink-3);margin:0 26px 10px 0;line-height:1.4}.dsc-share{border-top:0;margin-top:0;padding-top:0}.dsc-share .shr-title{font-size:15px}.dsc-share .shr-lede{margin-bottom:12px;line-height:1.55}.dsc-share .shr-row{gap:8px}.dsc-share .shr-btn{width:40px;height:40px}@media (max-width:560px){.dsc-share .shr-btn{width:44px;height:44px}}.dps{--dps-line:var(--bb-line);--dps-surface:var(--bb-surface-2);--dps-surface-raised:var(--bb-surface);--dps-ink:var(--bb-ink);--dps-ink-2:var(--bb-ink-2);--dps-ink-3:var(--bb-ink-3);--dps-accent:var(--bb-accent);--dps-accent-line:var(--bb-accent-line);--dps-accent-soft:var(--bb-accent-soft);border:1px solid var(--dps-line);background:var(--dps-surface);border-radius:10px;flex-wrap:wrap;align-items:center;gap:10px 14px;margin:0 0 26px;padding:13px 15px;display:flex}.site .dps{--dps-line:var(--line);--dps-surface:var(--surface-2);--dps-surface-raised:var(--surface);--dps-ink:var(--ink);--dps-ink-2:var(--ink-2);--dps-ink-3:var(--ink-3);--dps-accent:var(--accent);--dps-accent-line:var(--accent-line);--dps-accent-soft:var(--accent-soft)}.dps.dps-hub{margin:0 0 22px;padding:10px 14px}.dps-mark{border:1px solid var(--dps-line);background:var(--dps-surface-raised);min-height:36px;color:var(--dps-ink-2);font:inherit;font-size:var(--rl-fs-12-5);cursor:pointer;border-radius:7px;align-items:center;gap:9px;padding:0 14px 0 11px;font-weight:500;transition:border-color 80ms,color 80ms,background 80ms;display:inline-flex}.dps-mark:hover{border-color:var(--dps-accent-line);color:var(--dps-accent)}.dps-mark.is-done{border-color:var(--dps-accent-line);background:var(--dps-accent-soft);color:var(--dps-accent)}.dps-mark-box{border:1px solid var(--dps-line);border-radius:var(--rl-radius-xs);background:var(--dps-surface-raised);width:17px;height:17px;color:var(--dps-accent);flex:none;place-items:center;display:grid}.dps-mark.is-done .dps-mark-box{border-color:var(--dps-accent)}.dps-run{font-size:var(--rl-fs-12-5);color:var(--dps-ink-2);flex-wrap:wrap;align-items:baseline;gap:4px 10px;margin:0;display:flex}.dps-run-now{color:var(--dps-ink);font-variant-numeric:tabular-nums;font-weight:600}.dps-run-best{color:var(--dps-ink-3);font-variant-numeric:tabular-nums}.dps-run-empty{color:var(--dps-ink-3);font-weight:400}.dps-today{font-size:var(--rl-fs-11-5);color:var(--dps-accent);align-items:center;gap:5px;display:inline-flex}.dps-archive-note,.dps-note{font-size:var(--rl-fs-11-5);color:var(--dps-ink-3);margin:0;line-height:1.5}.dps-note{flex:220px;min-width:0}@media (max-width:640px){.dps{flex-direction:column;align-items:flex-start}.dps-note{flex:none}}.bb-app .skel-sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@keyframes bb-skel-pulse{0%,to{opacity:.35}50%{opacity:.65}}.bb-app .skel-line,.bb-app .skel-block{background:var(--bb-ink-4);animation:1.8s ease-in-out infinite bb-skel-pulse}.bb-app .skel-line{border-radius:var(--rl-radius-xs);width:100%;height:11px;display:block}.bb-app .skel-block{border-radius:var(--rl-radius-md)}@media (prefers-reduced-motion:reduce){.bb-app .skel-line,.bb-app .skel-block{opacity:.45;animation:none}}.bb-app .skel-hero{border-bottom:1px solid var(--bb-line);grid-template-columns:1fr auto;align-items:end;gap:32px;margin-bottom:22px;padding-bottom:22px;display:grid}.bb-app .skel-hero-copy{flex-direction:column;gap:12px;display:flex}.bb-app .skel-hero-stats{gap:4px;display:flex}.bb-app .skel-stat{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface);flex-direction:column;gap:8px;min-width:96px;padding:14px 18px;display:flex}.bb-app .skel-filterbar{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:18px;display:flex}.bb-app .skel-table{border:1px solid var(--bb-line);background:var(--bb-surface);border-radius:10px;overflow:hidden}.bb-app .skel-row{border-bottom:1px solid var(--bb-line-2);align-items:center;gap:14px;padding:12px 14px;display:flex}.bb-app .skel-row:last-child{border-bottom:none}.bb-app .skel-panel{border:1px solid var(--bb-line);background:var(--bb-surface);box-shadow:var(--bb-shadow-sm);border-radius:10px;padding:16px}.bb-app .skel-panel+.skel-panel{margin-top:14px}.bb-app .skel-option{align-items:center;gap:10px;padding:7px 4px;display:flex}.bb-app .skel-option .skel-block{border-radius:5px;flex:none;width:18px;height:18px}.bb-app .skel-option .skel-line{flex:auto}.bb-app .skel-card-stage{flex-direction:column;justify-content:center;align-items:center;gap:18px;padding:40px 0;display:flex}.bb-app .skel-card-stage .skel-block{border-radius:var(--rl-radius-xl);width:min(460px,86vw);height:min(420px,46vh)}.rl-maths{white-space:normal}.rl-maths sup,.rl-maths sub{vertical-align:baseline;font-size:.75em;line-height:0;position:relative}.rl-maths sup{top:-.45em}.rl-maths sub{bottom:-.25em}.rl-sqrt{white-space:nowrap;margin:0 .08em;padding-left:.62em;line-height:0;display:inline-block;position:relative}.rl-sqrt-sign{fill:none;stroke:currentColor;stroke-width:max(1px,.055em);stroke-linejoin:miter;stroke-linecap:square;width:.62em;height:100%;position:absolute;top:0;left:0}.rl-sqrt-rad{border-top:max(1px,.055em) solid;padding:.14em .2em 0 .06em;line-height:1.18;display:inline-block}.rl-frac{vertical-align:middle;text-align:center;grid-template-rows:1fr 1fr;margin:0 .16em;font-size:.88em;line-height:1.08;display:inline-grid}.rl-frac-num{align-self:end;padding:0 .26em .05em}.rl-frac-den{border-top:max(1px,.06em) solid;align-self:start;padding:.05em .26em 0}.rl-sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media print{body.is-printing-diagnostics .topbar,body.is-printing-diagnostics .rail1-nav,body.is-printing-diagnostics .rail2,body.is-printing-diagnostics .dx-gap-pack,body.is-printing-diagnostics .dx-retake-btn,body.is-printing-diagnostics .dx-print-btn{display:none!important}}.bb-app .mp-page .hero-sub{max-width:76ch}.bb-app .mp-page .stat{min-width:104px}.bb-app .mp-page .stat-l{white-space:nowrap}@media (min-width:1181px){.bb-app .mp-page .pack{scrollbar-width:thin;scrollbar-color:var(--bb-line) transparent;margin-right:-8px;padding-right:8px}.bb-app .mp-page .pack::-webkit-scrollbar{width:8px}.bb-app .mp-page .pack::-webkit-scrollbar-track{background:0 0}.bb-app .mp-page .pack::-webkit-scrollbar-thumb{background:var(--bb-line);border-radius:var(--rl-radius-pill)}}.bb-app .mp-page .mp-field .field-label{justify-content:space-between;width:100%}.bb-app .mp-page .mp-field .field-input{font-size:var(--rl-fs-body)}.bb-app .mp-format{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface-2);margin:2px 0 12px;padding:9px 11px}.bb-app .mp-format-spec{font-size:var(--rl-fs-body);color:var(--bb-ink)}.bb-app .mp-format-source{font-size:var(--rl-fs-meta);color:var(--bb-ink-3);margin-top:2px}.bb-app .mp-format-none{font-size:var(--rl-fs-meta);color:var(--bb-ink-3);margin:2px 0 12px;line-height:1.5}.bb-app .mp-format-custom{font-size:var(--rl-fs-meta);color:var(--bb-ink-2);margin:8px 0 0;line-height:1.5}.bb-app .mp-format-reset{font:inherit;color:var(--bb-accent);cursor:pointer;background:0 0;border:0;padding:0;text-decoration:underline}.bb-app .mp-format-reset:hover{filter:brightness(1.1)}.bb-app .mp-presets{flex-direction:column;gap:10px;margin-top:12px;display:flex}.bb-app .mp-preset-group-label{letter-spacing:.1em;text-transform:uppercase;color:var(--bb-ink-3);margin-bottom:5px;font-size:10px}.bb-app .mp-preset-grid{grid-template-columns:1fr 1fr 1fr;gap:5px;display:grid}.bb-app .mp-preset-grid .mp-preset-btn{border-radius:var(--rl-radius-md);font-size:var(--rl-fs-meta);font-weight:500;font-family:var(--font-plex-mono), ui-monospace, monospace;text-align:center;padding:6px 0}.bb-app .mp-preset-btn.is-active{background:var(--bb-accent);border-color:var(--bb-accent);color:var(--bb-paper)}.bb-app .mp-preset-btn.is-active:hover{color:var(--bb-paper);filter:brightness(1.05)}.bb-app .mp-stepper{border:1px solid var(--bb-line);background:var(--bb-surface);border-radius:9px;align-items:stretch;display:flex;overflow:hidden}.bb-app .mp-stepper-btn{width:38px;color:var(--bb-ink-2);font-size:var(--rl-fs-body);background:0 0;border:none;flex:none;justify-content:center;align-items:center;line-height:1;display:inline-flex}.bb-app .mp-stepper-btn:hover{background:var(--bb-surface-2);color:var(--bb-ink)}.bb-app .mp-stepper-value{text-align:center;min-width:0;font-size:var(--rl-fs-meta);color:var(--bb-ink);border-left:1px solid var(--bb-line);border-right:1px solid var(--bb-line);flex:1;padding:9px 8px;font-weight:600}.bb-app .mp-stepper-hint{padding:8px 2px 0;display:block}.bb-app .mp-page .mp-seed-shuffle{justify-content:center;width:100%;margin-top:10px;padding:8px 10px;display:flex}.bb-app .mp-libbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px 12px;margin-bottom:18px;display:flex}.bb-app .mp-bulk{gap:8px;display:flex}.bb-app .mp-bulk-btn{border:1px solid var(--bb-line);border-radius:var(--rl-radius-md);background:var(--bb-surface);height:32px;color:var(--bb-ink-2);font-size:var(--rl-fs-12-5);white-space:nowrap;align-items:center;gap:6px;padding:0 13px;font-weight:600;transition:border-color .1s,color .1s,background .1s;display:inline-flex}.bb-app .mp-bulk-btn:hover{border-color:var(--bb-accent-line);color:var(--bb-accent);background:var(--bb-accent-soft)}.bb-app .mp-section-head{align-items:baseline;gap:10px;margin-bottom:8px;display:flex}.bb-app .mp-section-title{font-family:var(--font-newsreader), Georgia, serif;font-weight:400;font-size:var(--rl-fs-h2);letter-spacing:-.015em;color:var(--bb-ink);flex:none;margin:0}.bb-app .mp-section-count{font-size:var(--rl-fs-11-5);color:var(--bb-ink-3);flex:none}.bb-app .mp-section-rule{background:var(--bb-line);flex:1;align-self:center;min-width:12px;height:1px}.bb-app .mp-library .topic{grid-template-columns:22px minmax(8rem,1fr) auto auto;min-height:44px}.bb-app .topic.mp-pick .mp-mark-cell,.bb-app .topic.mp-pick .topic-pages{white-space:nowrap}.bb-app .mp-mark-cell{justify-content:flex-end;display:flex}.bb-app .mp-library .section-rows>.topic:last-child:nth-child(odd){grid-column:1/-1}