/* =====================================================================
   Library (/library/): references, record wall, filters, glossary
   Prefix lb-. Depth 3 = purple. Access colours: PDF amber, DOI orange,
   arXiv crimson, link plum, citation-only hollow.
   ===================================================================== */
.lb {
  --lb-pdf: var(--amber);
  --lb-doi: var(--orange);
  --lb-arxiv: var(--crimson);
  --lb-link: #9e125a;
  --lb-hollow: repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0 1.5px, transparent 1.5px 5px);
  --lb-top: calc(var(--header-h) + 3px);
}
.lb-sw { display: inline-block; width: 10px; height: 10px; border-radius: 2px; flex: none; }
.lb-sw--pdf { background: var(--lb-pdf); }
.lb-sw--doi { background: var(--lb-doi); }
.lb-sw--arxiv { background: var(--lb-arxiv); }
.lb-sw--link { background: var(--lb-link); }
.lb-sw--record { background: var(--lb-hollow); box-shadow: inset 0 0 0 1px var(--line-2); }

/* ---------- hero ---------- */
.lb-hero { padding-block: clamp(36px, 5vw, 72px) clamp(48px, 6vw, 88px); position: relative; }
.lb-hero::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 680px; background: radial-gradient(50% 60% at 82% 8%, rgba(100, 13, 95, 0.4), transparent 72%); pointer-events: none; z-index: -1; }
.lb-hero__t { font: 400 clamp(64px, 13vw, 210px)/0.86 var(--font-display); letter-spacing: var(--track-display); margin: 0; }
.lb-hero__row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 620px); gap: 40px clamp(40px, 6vw, 120px); margin-top: clamp(32px, 4.5vw, 64px); align-items: end; }
.lb-hero__lead { margin: 0; max-width: 42ch; }
.lb-ledger { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0 22px; margin: 0; }
.lb-ledger > div { padding: 14px 0 0; border-top: 1px solid var(--line); min-width: 0; }
.lb-ledger dt { font: 500 10.5px/1.25 var(--font-mono); letter-spacing: 0.05em; color: var(--purple-ink); margin-bottom: 10px; }
.lb-ledger dd { margin: 0; font: 400 clamp(40px, 4.6vw, 72px)/0.9 var(--font-display); letter-spacing: var(--track-display); color: var(--ink); }
.lb-ledger .is-zero dd { color: var(--ink-3); }

.lb-avail { margin-top: clamp(40px, 5vw, 72px); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px clamp(32px, 5vw, 88px); padding-top: 22px; border-top: 1px solid var(--line); }
.lb-avail__k { grid-column: 1 / -1; font: 500 11px/1 var(--font-mono); letter-spacing: 0.05em; color: var(--purple-ink); margin: 0; }
.lb-avail__bar { grid-column: 1 / -1; display: flex; gap: 3px; height: 44px; }
.lb-avail__seg { flex: var(--n) 1 0; min-width: 34px; display: flex; align-items: center; padding: 0 12px; border-radius: 2px; }
.lb-avail__seg b { font: 400 22px/1 var(--font-display); letter-spacing: -0.04em; color: #fff; }
.lb-avail__seg--pdf { background: var(--lb-pdf); }
.lb-avail__seg--pdf b { color: #121212; }
.lb-avail__seg--doi { background: var(--lb-doi); }
.lb-avail__seg--arxiv { background: var(--lb-arxiv); }
.lb-avail__seg--link { background: var(--lb-link); }
.lb-avail__seg--record { background: var(--lb-hollow); box-shadow: inset 0 0 0 1px var(--line-2); }
.lb-avail__legend { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font: 400 13px/1.4 var(--font-mono); color: var(--ink-2); }
.lb-avail__legend li { display: flex; align-items: center; gap: 10px; }
.lb-avail__legend b { color: var(--ink); font-weight: 500; min-width: 2.2ch; text-align: right; font-variant-numeric: tabular-nums; }
.lb-avail__note { margin: 0; font: 400 15px/1.6 var(--font-text); color: var(--ink-2); max-width: 60ch; }
.lb-avail__note code { color: var(--amber-ink); font-size: 0.86em; }

/* ---------- record wall ---------- */
.lb-wall { background: var(--bg-deep); border-block: 1px solid var(--line); padding-block: clamp(40px, 5vw, 72px) clamp(36px, 4vw, 56px); }
.lb-wall__head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 8px 32px; margin-bottom: 26px; }
.lb-wall__label { font: 500 12px/1.2 var(--font-mono); letter-spacing: 0.05em; color: var(--purple-ink); margin: 0; }
.lb-wall__hint { font: 400 13px/1.5 var(--font-mono); color: var(--ink-3); margin: 0; }
.lb-wall__chart { display: grid; grid-template-columns: repeat(var(--cols), minmax(0, 1fr)) minmax(0, 1.6fr); gap: 3px; align-items: end; height: calc(9 * 17px + 4px); padding-bottom: 26px; border-bottom: 1px solid var(--line-2); position: relative; box-sizing: content-box; }
.lb-wall__col { position: relative; display: flex; flex-direction: column-reverse; gap: 3px; height: 100%; }
.lb-wall__col.is-decade::before { content: ""; position: absolute; left: -2px; bottom: -26px; top: 0; width: 1px; background: var(--line); }
.lb-wall__col--nd { margin-left: 45%; }
.lb-wall__col--nd .lb-wall__y { left: auto; right: 0; }
.lb-wall__y { position: absolute; bottom: -24px; left: -2px; font: 400 10.5px/1 var(--font-mono); color: var(--ink-3); white-space: nowrap; }
.lb-hb { display: block; height: 14px; flex: none; border-radius: 1.5px; transition: opacity 0.25s, transform 0.2s var(--ease), box-shadow 0.2s; }
.lb-hb--pdf { background: var(--lb-pdf); }
.lb-hb--doi { background: var(--lb-doi); }
.lb-hb--arxiv { background: var(--lb-arxiv); }
.lb-hb--link { background: var(--lb-link); }
.lb-hb--record { background: var(--lb-hollow); box-shadow: inset 0 0 0 1px var(--line-2); }
.lb-hb:hover, .lb-hb:focus-visible { transform: scale(1.18); box-shadow: 0 0 0 2px var(--ink); z-index: 1; outline: none; }
.lb-hb.is-dim { opacity: 0.12; }
.js .lb-wall__chart .lb-hb { opacity: 0; transform: translateY(-12px); }
.js .lb-wall__chart.is-in .lb-hb { opacity: 1; transform: none; transition: opacity 0.5s var(--d, 0s), transform 0.6s var(--ease-out) var(--d, 0s); }
.js .lb-wall__chart.is-in .lb-hb.is-dim { opacity: 0.12; }
@media (prefers-reduced-motion: reduce) { .js .lb-wall__chart .lb-hb { opacity: 1; transform: none; transition: none; } }

/* ---------- browse layout ---------- */
.lb-browse { padding-block: clamp(48px, 6vw, 88px) clamp(72px, 9vw, 140px); }
.lb-browse__in { display: grid; grid-template-columns: 290px minmax(0, 1fr); gap: 0 clamp(36px, 4.4vw, 72px); align-items: start; }
.lb-mbar { display: none; }
.lb-rail { position: sticky; top: calc(var(--lb-top) + 20px); max-height: calc(100vh - var(--lb-top) - 32px); overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; scrollbar-color: var(--bg-raise-2) transparent; padding: 0 6px 20px 0; display: grid; gap: 18px; align-content: start; }
.lb-rail__head { display: none; }
.lb-scrim[hidden] { display: none; }
.lb-f__legend { display: block; font: 500 10.5px/1.2 var(--font-mono); letter-spacing: 0.05em; color: var(--purple-ink); margin: 0 0 10px; padding: 0; }
.lb-search { display: block; }
.lb-search input { width: 100%; font: 400 16px/1.3 var(--font-text); color: var(--ink); background: var(--bg-raise); border: 1px solid var(--line-2); border-radius: 4px; padding: 12px 14px; outline: none; transition: border-color 0.2s, background 0.2s; }
.lb-search input::placeholder { color: var(--ink-3); }
.lb-search input:focus { border-color: var(--purple-ink); background: #242424; }
.lb-f { border: 0; margin: 0; padding: 0; min-width: 0; display: grid; gap: 2px; }
.lb-f--row { display: flex; flex-wrap: wrap; gap: 6px; }
.lb-f--row .lb-f__legend { width: 100%; }
.lb-opt { display: grid; grid-template-columns: 24px minmax(0, 1fr) auto; align-items: baseline; gap: 8px; width: 100%; text-align: left; padding: 6px 8px; border-radius: 4px; color: var(--ink-2); transition: background 0.15s, color 0.15s; }
.lb-opt:hover:not(:disabled) { background: rgba(255, 255, 255, 0.05); color: var(--ink); }
.lb-opt[aria-pressed="true"] { background: rgba(213, 139, 224, 0.16); color: var(--ink); }
.lb-opt:disabled { opacity: 0.45; cursor: default; }
.lb-opt.is-empty:not([aria-pressed="true"]) { opacity: 0.4; }
.lb-opt__n { font: 500 11px/1.3 var(--font-mono); color: var(--purple-ink); }
.lb-opt__t { font: 400 13px/1.28 var(--font-text); }
.lb-opt__c { font: 400 11px/1.3 var(--font-mono); color: var(--ink-3); font-variant-numeric: tabular-nums; }
.lb-opt .lb-sw { align-self: center; justify-self: start; }
.lb-opt--pill { display: inline-flex; width: auto; gap: 6px; align-items: center; padding: 7px 11px; border: 1px solid var(--line-2); border-radius: 99px; }
.lb-opt--pill .lb-opt__t { font: 500 12px/1 var(--font-mono); }
.lb-opt--pill[aria-pressed="true"] { background: var(--ink); color: #121212; border-color: var(--ink); }
.lb-opt--pill[aria-pressed="true"] .lb-opt__c { color: #555; }
.lb-reset { justify-self: start; font: 500 11.5px/1 var(--font-mono); color: var(--ink-3); padding: 8px 0; }
.lb-reset:hover { color: var(--amber); }

/* ---------- results ---------- */
.lb-results { min-width: 0; }
.lb-status { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; min-height: 36px; }
.lb-status__n { margin: 0; font: 400 13px/1.3 var(--font-mono); color: var(--ink-3); }
.lb-status__n b { font: 400 30px/1 var(--font-display); letter-spacing: -0.04em; color: var(--ink); margin-right: 4px; vertical-align: -0.12em; }
.lb-status__chips { display: flex; flex-wrap: wrap; gap: 6px; }
.lb-achip { display: inline-flex; align-items: center; gap: 6px; font: 500 11.5px/1 var(--font-mono); color: var(--ink); padding: 7px 9px; border-radius: 99px; background: rgba(213, 139, 224, 0.16); }
.lb-achip:hover { background: rgba(213, 139, 224, 0.28); }
.lb-achip span { color: var(--purple-ink); }

.lb-jump { position: sticky; top: var(--lb-top); z-index: 20; display: flex; flex-wrap: wrap; gap: 2px; padding: 10px 0; margin-top: 14px; background: color-mix(in srgb, var(--bg) 92%, transparent); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.lb-jump a { min-width: 30px; height: 30px; display: inline-grid; place-items: center; font: 500 12px/1 var(--font-mono); color: var(--ink-2); text-decoration: none; border-radius: 3px; }
.lb-jump a:hover { background: rgba(255, 255, 255, 0.06); color: var(--ink); }
.lb-jump a.is-off { color: var(--ink-3); opacity: 0.35; pointer-events: none; }
.lb-jump a.is-here { color: var(--purple-ink); background: rgba(213, 139, 224, 0.12); }
.lb-jump[hidden] { display: none; }

.lb-group { display: grid; grid-template-columns: 84px minmax(0, 1fr); gap: 0 20px; padding-top: 26px; }
.lb-group[hidden] { display: none; }
.lb-group__h { margin: 0; position: sticky; top: calc(var(--lb-top) + 64px); align-self: start; display: grid; gap: 6px; }
.lb-group__l { font: 400 clamp(56px, 6vw, 92px)/0.82 var(--font-display); letter-spacing: -0.06em; color: var(--purple-ink); }
.lb-group__c { font: 400 11px/1 var(--font-mono); color: var(--ink-3); }
.lb-group__items { border-top: 1px solid var(--line-2); }

.lb-ref { position: relative; display: grid; grid-template-columns: 72px minmax(0, 1fr) auto; gap: 4px 22px; padding: 22px 0 24px; border-bottom: 1px solid var(--line); scroll-margin-top: calc(var(--lb-top) + 70px); }
.lb-ref[hidden] { display: none; }
.lb-ref__year { font: 400 30px/1 var(--font-display); letter-spacing: -0.05em; color: var(--ink); padding-top: 2px; }
.lb-ref--record .lb-ref__year { color: var(--ink-2); }
.lb-ref__body { min-width: 0; display: grid; gap: 8px; }
.lb-ref__authors { margin: 0; font: 400 12.5px/1.5 var(--font-mono); color: var(--ink-2); }
.lb-ref__y { color: var(--ink-3); }
.lb-ref__title { margin: 0; font: 400 clamp(19px, 1.6vw, 23px)/1.22 var(--font-display); letter-spacing: -0.02em; color: var(--ink); text-wrap: pretty; max-width: 52ch; }
.lb-ref__venue { margin: 0; font: 400 14.5px/1.5 var(--font-text); color: var(--ink-3); max-width: 70ch; }
.lb-ref__gloss { margin: 0; font: 400 16px/1.5 var(--font-text); color: var(--ink-2); max-width: 70ch; }
.lb-tag { display: inline-block; font: 500 9.5px/1.3 var(--font-mono); letter-spacing: 0.04em; color: var(--ink-3); border: 1px solid var(--line-2); border-radius: 3px; padding: 2px 5px 1px; margin-right: 6px; vertical-align: 0.18em; cursor: help; }
.lb-ref a.arxiv, .lb-ref a.doi { color: var(--ink-2); }
.lb-ref__acts { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.lb-btn { display: inline-flex; align-items: center; gap: 7px; min-height: 32px; padding: 0 10px; font: 400 12px/1.2 var(--font-mono); color: var(--ink); text-decoration: none; border: 1px solid var(--line-2); border-radius: 3px; transition: border-color 0.2s, background 0.2s, color 0.2s; overflow-wrap: anywhere; text-align: left; }
.lb-btn:hover { border-color: var(--ink-2); }
.lb-btn__k { font-weight: 600; font-size: 10.5px; letter-spacing: 0.04em; }
.lb-btn--doi .lb-btn__k { color: var(--orange-ink); }
.lb-btn--doi:hover { border-color: var(--orange); }
.lb-btn--arxiv .lb-btn__k { color: var(--crimson-ink); }
.lb-btn--arxiv:hover { border-color: var(--crimson); }
.lb-btn--pdf { background: var(--lb-pdf); border-color: var(--lb-pdf); color: #121212; font-weight: 600; }
.lb-btn--pdf:hover { background: #fff; border-color: #fff; }
.lb-btn__sub { font-weight: 400; opacity: 0.75; }
.lb-btn--miss { color: var(--ink-3); border-style: dashed; cursor: default; }
.lb-btn--none { color: var(--ink-3); border-style: dashed; cursor: default; }
.lb-btn--ghost { border-color: transparent; color: var(--ink-3); }
.lb-btn--ghost:hover { color: var(--ink); border-color: var(--line-2); }
.lb-btn--hash { padding: 0 9px; }
.lb-ref__util { display: inline-flex; gap: 2px; }
.lb-btn.ext::after { color: var(--ink-3); }
.lb-ref__cited { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: 2px; }
.lb-ref__ck { font: 500 10px/1 var(--font-mono); letter-spacing: 0.05em; color: var(--ink-3); margin-right: 2px; }
.lb-cchip { display: inline-flex; align-items: baseline; gap: 6px; font: 400 12.5px/1.3 var(--font-text); color: var(--ink-2); text-decoration: none; padding: 5px 9px; border: 1px solid var(--line); border-radius: 99px; transition: border-color 0.2s, color 0.2s; text-align: left; }
.lb-cchip b { font: 500 11px/1 var(--font-mono); color: var(--crimson-ink); }
a.lb-cchip:hover { color: var(--ink); border-color: var(--crimson); }
.lb-cchip--doc { font-family: var(--font-mono); font-size: 11.5px; }
a.lb-cchip--doc:hover { border-color: var(--purple-ink); }
.lb-cchip--note { color: var(--ink-3); border-style: dashed; font-size: 12px; }
.lb-ref__badge { padding-top: 4px; }
.lb-badge { display: inline-flex; align-items: center; gap: 6px; font: 500 10px/1 var(--font-mono); letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-2); white-space: nowrap; }
.lb-badge::before { content: ""; width: 10px; height: 10px; border-radius: 2px; }
.lb-badge--pdf { color: var(--amber-ink); }
.lb-badge--pdf::before { background: var(--lb-pdf); }
.lb-badge--doi::before { background: var(--lb-doi); }
.lb-badge--arxiv::before { background: var(--lb-arxiv); }
.lb-badge--link::before { background: var(--lb-link); }
.lb-badge--record { color: var(--ink-3); }
.lb-badge--record::before { background: var(--lb-hollow); box-shadow: inset 0 0 0 1px var(--line-2); }

/* landing highlight */
.lb-ref.is-flash::before, .lb-term.is-flash::after { content: ""; position: absolute; pointer-events: none; animation: lbFlash 3.2s var(--ease) forwards; }
.lb-ref.is-flash::before { inset: 0 -18px; border-left: 3px solid var(--purple-ink); background: linear-gradient(90deg, rgba(213, 139, 224, 0.16), rgba(213, 139, 224, 0.04) 70%, transparent); border-radius: 0 6px 6px 0; z-index: -1; }
@keyframes lbFlash { 0% { opacity: 0; } 8% { opacity: 1; } 72% { opacity: 1; } 100% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .lb-ref.is-flash::before, .lb-term.is-flash::after { animation-duration: 0.01s; animation-delay: 3s; animation-fill-mode: backwards; } }

.lb-empty { padding: 56px 0; display: grid; gap: 18px; justify-items: start; }
.lb-empty[hidden] { display: none; }
.lb-empty__t { margin: 0; font: 400 clamp(26px, 3vw, 40px)/1.05 var(--font-display); letter-spacing: -0.04em; }

/* ---------- about ---------- */
.lb-about { border-top: 1px solid var(--line); padding-block: clamp(64px, 8vw, 120px); }
.lb-about__in { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 32px clamp(40px, 6vw, 120px); }
.lb-about__t { font: 400 clamp(34px, 4vw, 60px)/0.98 var(--font-display); letter-spacing: -0.045em; margin: 0 0 28px; max-width: 12ch; }
.lb-about__body { font: 400 16.5px/1.65 var(--font-text); color: var(--ink-2); max-width: 66ch; }
.lb-about__body > * + * { margin-top: 1em; }
.lb-about__body h3 { font: 500 11px/1.2 var(--font-mono); letter-spacing: 0.05em; text-transform: uppercase; color: var(--purple-ink); margin-top: 2em; }
.lb-about__body code { color: var(--amber-ink); font-size: 0.84em; }
.lb-about__body a { color: var(--ink); }

/* ---------- glossary (paper band) ---------- */
.lb-gloss { padding-block: clamp(72px, 9vw, 140px); scroll-margin-top: var(--lb-top); }
.lb-gloss__head { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 12px clamp(32px, 5vw, 88px); align-items: end; margin-bottom: clamp(40px, 5vw, 72px); }
.lb-gloss__head .kicker { grid-column: 1 / -1; margin-bottom: 0; }
.lb-gloss__t { font: 400 clamp(52px, 8vw, 132px)/0.88 var(--font-display); letter-spacing: var(--track-display); color: var(--paper-ink); margin: 0; }
.lb-gloss__t span { color: var(--purple); }
.lb-gloss__lead { margin: 0; font: 400 17px/1.5 var(--font-text); color: var(--paper-ink-2); max-width: 44ch; }
.lb-gloss__cats { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px; margin-top: 18px; }
.lb-gloss__cats a { font: 500 12px/1 var(--font-mono); color: var(--paper-ink); text-decoration: none; padding: 9px 12px; border: 1px solid var(--paper-line); border-radius: 99px; }
.lb-gloss__cats a span { color: var(--purple); margin-left: 4px; }
.lb-gloss__cats a:hover { background: var(--paper-ink); color: var(--paper); }
.lb-gcat { padding-top: 36px; margin-top: 36px; border-top: 1px solid var(--paper-line); scroll-margin-top: calc(var(--lb-top) + 20px); }
.lb-gcat__h { font: 400 clamp(28px, 3vw, 44px)/1 var(--font-display); letter-spacing: -0.04em; color: var(--paper-ink); margin: 0 0 22px; }
.lb-gcat__h span { font: 500 12px/1 var(--font-mono); color: var(--purple); letter-spacing: 0.04em; vertical-align: 0.6em; margin-right: 6px; }
.lb-terms { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 270px), 1fr)); gap: 10px; margin: 0; }
.lb-term { position: relative; background: var(--paper-2); border-radius: var(--radius); padding: 18px 18px 14px; display: grid; grid-template-rows: auto 1fr auto; gap: 8px; scroll-margin-top: calc(var(--lb-top) + 24px); }
.lb-term__k { font: 400 23px/1.05 var(--font-display); letter-spacing: -0.03em; color: var(--purple); }
.lb-term__d { margin: 0; font: 400 13px/1.55 var(--font-mono); color: var(--paper-ink-2); }
.lb-term__a { margin: 4px 0 0; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.lb-term__s { font: 500 11.5px/1 var(--font-mono); color: var(--paper-ink); padding: 8px 0; }
.lb-term__s:hover { color: var(--purple); }
.lb-term__hash { font: 500 12px/1 var(--font-mono); color: var(--paper-ink-2); text-decoration: none; padding: 8px 4px; opacity: 0.6; }
.lb-term__hash:hover { opacity: 1; color: var(--purple); }
.lb-term.is-flash::after { inset: -3px; border-radius: 8px; box-shadow: 0 0 0 3px var(--purple); }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .lb-hero__row { grid-template-columns: minmax(0, 1fr); align-items: start; }
  .lb-browse__in { grid-template-columns: minmax(0, 1fr); }
  .lb-mbar { display: flex; gap: 8px; position: sticky; top: var(--lb-top); z-index: 40; margin-inline: calc(var(--gutter) * -1); padding: 10px var(--gutter); background: color-mix(in srgb, var(--bg) 92%, transparent); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
  .lb-mbar .lb-search { flex: 1; min-width: 0; }
  .lb-mbar .lb-search input { padding: 10px 12px; font-size: 16px; }
  .lb-mbar__btn { flex: none; font: 500 12.5px/1 var(--font-mono); color: var(--ink); border: 1px solid var(--line-2); border-radius: 4px; padding: 0 14px; min-height: 44px; }
  .lb-mbar__btn span:not(:empty) { display: inline-grid; place-items: center; min-width: 20px; height: 20px; margin-left: 6px; border-radius: 99px; background: var(--purple-ink); color: #121212; font-size: 11px; }
  .lb-rail { position: fixed; top: auto; left: 0; right: 0; bottom: 0; z-index: 130; max-height: min(84vh, 760px); padding: 0 var(--gutter) calc(24px + env(safe-area-inset-bottom)); background: var(--bg-raise); border-radius: 14px 14px 0 0; box-shadow: 0 -20px 60px rgba(0, 0, 0, 0.5); transform: translateY(105%); visibility: hidden; transition: transform 0.38s var(--ease-out), visibility 0s linear 0.38s; }
  .lb-rail.is-open { transform: none; visibility: visible; transition: transform 0.38s var(--ease-out); }
  .lb-rail__head { display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 1; background: var(--bg-raise); padding: 14px 0 10px; border-bottom: 1px solid var(--line); }
  .lb-rail__k { margin: 0; font: 500 11px/1 var(--font-mono); letter-spacing: 0.05em; color: var(--purple-ink); }
  .lb-rail__close { font: 500 12px/1 var(--font-mono); color: var(--ink); padding: 12px 4px; }
  .lb-rail > .lb-search { display: none; }
  .lb-opt { padding-block: 10px; }
  .lb-scrim { position: fixed; inset: 0; z-index: 129; background: rgba(0, 0, 0, 0.6); }
  .lb-jump { top: calc(var(--lb-top) + 65px); }
  .lb-group__h { top: calc(var(--lb-top) + 65px + 60px); }
  .lb-ref { scroll-margin-top: calc(var(--lb-top) + 140px); }
  .lb-about__in { grid-template-columns: minmax(0, 1fr); }
  .lb-gloss__head { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 720px) {
  .lb-ledger { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 16px; }
  .lb-ledger > div { padding-bottom: 14px; }
  .lb-avail { grid-template-columns: minmax(0, 1fr); }
  .lb-avail__seg { padding: 0 8px; min-width: 26px; }
  .lb-avail__seg b { font-size: 17px; }
  .lb-wall__chart { gap: 1px; height: calc(9 * 9px + 2px); }
  .lb-wall__col { gap: 1px; }
  .lb-hb { height: 8px; border-radius: 1px; }
  .lb-wall__y { font-size: 9px; }
  .lb-wall__col:not(.is-decade):not(.lb-wall__col--nd) .lb-wall__y { display: none; }
  .lb-wall__hint { font-size: 12px; }
  .lb-jump { display: none; }
  .lb-group { grid-template-columns: minmax(0, 1fr); padding-top: 28px; }
  .lb-group__h { position: static; display: flex; align-items: baseline; gap: 12px; padding-bottom: 10px; }
  .lb-group__l { font-size: 52px; }
  .lb-ref { grid-template-columns: minmax(0, 1fr) auto; gap: 6px 12px; padding: 18px 0 20px; scroll-margin-top: calc(var(--lb-top) + 80px); }
  .lb-ref__year { font-size: 24px; grid-column: 1; grid-row: 1; }
  .lb-ref__badge { grid-column: 2; grid-row: 1; align-self: center; padding: 0; }
  .lb-ref__body { grid-column: 1 / -1; }
  .lb-ref__title { font-size: 19px; }
  .lb-ref.is-flash::before { inset: 0 -10px; }
}
.lb-toast { position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom)); transform: translate(-50%, 12px); z-index: 140; padding: 10px 14px; background: var(--paper-2); color: var(--paper-ink); border-radius: 4px; font: 500 12px/1 var(--font-mono); opacity: 0; pointer-events: none; transition: opacity 0.2s, transform 0.2s var(--ease); }
.lb-toast.is-on { opacity: 1; transform: translate(-50%, 0); }
.lb-group--dec { grid-template-columns: 120px minmax(0, 1fr); }
.lb-group--dec .lb-group__l { font-size: clamp(34px, 3.4vw, 52px); letter-spacing: -0.05em; }
@media (max-width: 720px) { .lb-group--dec { grid-template-columns: minmax(0, 1fr); } }

.lb-cta { display: inline-flex; align-items: center; gap: 8px; min-height: 42px; padding: 0 16px; font: 500 12.5px/1 var(--font-mono); color: var(--ink); text-decoration: none; border: 1px solid var(--line-2); border-radius: 3px; transition: border-color 0.2s, background 0.2s, color 0.2s; }
.lb-cta:hover { border-color: var(--ink); background: rgba(255, 255, 255, 0.04); }
@media (prefers-reduced-motion: reduce) { .lb-rail { transition: none !important; } }
.lb-wall__dec { cursor: pointer; padding: 3px 4px; margin: -3px -4px; border-radius: 3px; z-index: 2; transition: color 0.2s, background 0.2s; }
.lb-wall__dec:hover { color: var(--ink); background: rgba(255, 255, 255, 0.06); }
.lb-wall__dec.is-on { color: #121212; background: var(--ink); }

/* round 4: only real actions read as buttons; sort in the results bar; compact rail with a scroll cue */
.lb-btn--ghost { color: var(--ink-2); }
.lb-sort { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.lb-sort__k { font: 500 10.5px/1 var(--font-mono); letter-spacing: 0.05em; color: var(--purple-ink); margin-right: 6px; }
.lb-sort .lb-opt--pill { padding: 6px 10px; }
.lb-f--row .lb-opt--pill { padding: 6px 9px; gap: 5px; }
.lb-f--row .lb-opt--pill .lb-opt__t { font-size: 11.5px; }
.lb-rail__more { position: sticky; bottom: 0; justify-self: stretch; font: 500 10.5px/1 var(--font-mono); letter-spacing: 0.04em; color: var(--ink-2); background: var(--bg); padding: 10px 0 4px; margin-top: -12px; box-shadow: 0 -22px 20px 2px var(--bg); opacity: 0; pointer-events: none; transition: opacity 0.2s; z-index: 2; }
.lb-rail.has-more .lb-rail__more { opacity: 1; }
@media (max-width: 720px) { .lb-sort { margin-left: 0; width: 100%; } }
@media (max-width: 1080px) { .lb-rail__more { display: none; } }
@media (min-width: 1081px) {
  .lb-rail { gap: 16px; }
  .lb-f[data-facet="cl"] .lb-opt { padding-block: 5px; }
  .lb-f[data-facet="cl"] .lb-opt__t { font-size: 12.5px; line-height: 1.25; }
  .lb-f[data-facet="dec"] { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 5px; }
  .lb-f[data-facet="dec"] .lb-f__legend { grid-column: 1 / -1; margin-bottom: 5px; }
  .lb-f[data-facet="dec"] .lb-opt--pill { justify-content: center; padding: 6px 4px; }
  .lb-search input { padding-block: 10px; }
}
.lb-rail__more { bottom: -20px; padding-bottom: 22px; }