/* ============================================================
   Simulating Silence — redesign design system
   Implements the 18 Jul 2026 handoff. Self-contained: pages
   using this stylesheet do not depend on styles.css.
   ============================================================ */

/* ---- Tokens ---- */
:root {
  --ink: #1c1a17; --ink-2: #2a2620; --ink-3: #3a352e; --ink-4: #4a463f; --ink-prose: #221f1a;
  --paper: #fbf9f4; --raised: #f4f0e6; --panel: #f9f6ef; --tint: #eef2ee;
  --muted: #6f6a60; --muted-2: #928c80; --muted-3: #8a8478; --muted-4: #a49d90;
  --rule: #e4ddcf; --rule-2: #efe9dc; --rule-3: #ecd9cc; --rule-sep: #c9c1b2;
  --accent: #3a5a5b; --accent-deep: #28403f;
  --on-dark-accent: #9fb3ac; --on-dark-accent-2: #7fb0a8; --on-dark-accent-3: #9fd0c6;
  --rust: #9c4a2f; --rust-bg: #f7ede6;
  --dark: #1c1a17; --dark-2: #232120; --dark-3: #34302a; --dark-4: #3a352e;
  --on-dark: #f3efe6; --on-dark-2: #e9e4d9; --on-dark-3: #cfc9bd; --on-dark-4: #c7c1b5; --on-dark-5: #b7b1a5; --on-dark-6: #9a9488;
  --serif: "Spectral", Georgia, "Times New Roman", serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --maxw: 1140px;
}

/* ---- Reset / base ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--serif); font-size: 17px; line-height: 1.6;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--accent-deep); }
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 700; letter-spacing: -0.01em; color: var(--ink); margin: 0 0 .5em; }
.eyebrow { font-family: var(--sans); font-weight: 600; text-transform: uppercase; letter-spacing: 0.2em; font-size: 11px; color: var(--accent); }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }
.band { width: 100%; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--ink); color: var(--on-dark); padding: 10px 16px; z-index: 100; }
.skip-link:focus { left: 8px; top: 8px; }

/* ---- Header / nav (5 links + Start here) ---- */
.rd-header {
  position: sticky; top: 0; z-index: 40; height: 66px;
  background: rgba(251,249,244,.94); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.rd-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.rd-logo { text-decoration: none; display: block; }
.rd-logo .l1 { font-family: var(--serif); font-weight: 700; font-size: 19px; letter-spacing: -0.01em; color: var(--ink); }
.rd-logo .l2 { font-family: var(--sans); font-size: 9px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted-2); margin-top: 3px; }
.rd-nav { display: flex; align-items: center; gap: 2px; }
.rd-nav a { font-family: var(--sans); font-size: 14px; font-weight: 500; color: var(--ink-2); text-decoration: none; padding: 8px 12px; border-radius: 6px; }
.rd-nav a:hover { background: #f4f0e6; }
.rd-nav a[aria-current="page"] { color: var(--accent); }
.rd-start { font-family: var(--sans); font-size: 14px; font-weight: 600; color: var(--paper) !important; background: var(--accent); padding: 9px 16px; border-radius: 6px; margin-left: 8px; text-decoration: none; }
.rd-start:hover { background: var(--accent-deep); }
.rd-nav-toggle { display: none; }
@media (max-width: 860px) {
  .rd-nav-toggle { display: inline-flex; align-items: center; gap: 6px; font-family: var(--sans); font-size: 14px; font-weight: 600; background: none; border: 1px solid var(--rule); border-radius: 6px; padding: 8px 12px; cursor: pointer; color: var(--ink-2); }
  .rd-nav { position: absolute; top: 66px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--paper); border-bottom: 1px solid var(--rule); padding: 8px; display: none; }
  .rd-nav.open { display: flex; }
  .rd-nav a, .rd-start { padding: 12px; margin: 0; border-radius: 6px; }
  .rd-start { text-align: center; margin-top: 6px; }
}

/* ---- Breadcrumb ---- */
.rd-crumb { font-family: var(--sans); font-size: 12px; color: var(--muted-2); padding: 16px 0 0; }
.rd-crumb a { color: var(--muted-2); text-decoration: none; }
.rd-crumb a:hover { color: var(--accent); text-decoration: underline; }
.rd-crumb .sep { color: var(--rule-sep); margin: 0 6px; }
.rd-crumb .cur { color: var(--accent); }

/* ---- Buttons ---- */
.btn { display: inline-block; font-family: var(--sans); font-weight: 600; font-size: 15px; padding: 13px 24px; border-radius: 7px; text-decoration: none; border: 1px solid transparent; cursor: pointer; }
.btn-primary { background: var(--accent); color: var(--paper); }
.btn-primary:hover { background: var(--accent-deep); color: var(--paper); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn-ghost:hover { border-color: var(--muted-3); color: var(--ink); }
.btn-on-dark-solid { background: var(--on-dark); color: var(--ink); }
.btn-on-dark-solid:hover { background: #fff; color: var(--ink); }
.btn-on-dark-ghost { background: transparent; color: var(--on-dark); border-color: #4a463f; }
.btn-on-dark-ghost:hover { border-color: #8a8478; color: var(--on-dark); }
.btn-sm { padding: 11px 22px; font-size: 14px; }

/* ---- Chips / tags ---- */
.chip-note { display: inline-block; background: var(--rust-bg); border: 1px solid var(--rule-3); color: var(--rust); font-family: var(--sans); font-size: 13px; padding: 6px 12px; border-radius: 6px; }
.kicker { font-family: var(--sans); font-weight: 700; text-transform: uppercase; letter-spacing: 0.14em; font-size: 9px; color: var(--accent); }
.monolabel { font-family: var(--mono); font-size: 13.5px; font-weight: 500; color: var(--accent); }

/* ============================================================
   HOMEPAGE
   ============================================================ */
.hero { background: var(--dark); color: var(--on-dark); }
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; min-height: 520px; align-items: center; padding-top: 64px; padding-bottom: 64px; }
.hero-eyebrow { color: var(--on-dark-accent); }
.hero h1 { color: var(--on-dark); font-size: 52px; line-height: 1.04; letter-spacing: -0.02em; text-wrap: balance; margin-bottom: 20px; }
.hero p { font-size: 18px; line-height: 1.6; color: var(--on-dark-3); max-width: 34em; }
.hero p strong { color: var(--on-dark); font-weight: 600; }
.hero-cta { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 26px; margin-top: 38px; flex-wrap: wrap; }
.hero-stats .stat { padding-left: 26px; border-left: 1px solid #3a352e; }
.hero-stats .stat:first-child { padding-left: 0; border-left: 0; }
.hero-stats .num { font-family: var(--serif); font-weight: 700; font-size: 22px; color: var(--on-dark); }
.hero-stats .lbl { font-family: var(--sans); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--on-dark-6); margin-top: 2px; }
.hero-media { position: relative; aspect-ratio: 4/3; border-radius: 6px; overflow: hidden; border: 1px solid #2c2a25; box-shadow: 0 24px 60px rgba(0,0,0,.4); background: linear-gradient(160deg,#3a4548 0%,#232a2b 55%,#14181a 100%); }
.hero-media a.play { position: absolute; inset: 0; display: grid; place-items: center; }
.play-btn { width: 66px; height: 66px; border-radius: 50%; background: rgba(251,249,244,.92); box-shadow: 0 6px 24px rgba(0,0,0,.4); display: grid; place-items: center; }
.play-btn::after { content: ""; width: 0; height: 0; border-top: 12px solid transparent; border-bottom: 12px solid transparent; border-left: 20px solid var(--ink); margin-left: 5px; }
.hero-media .cap { position: absolute; left: 0; right: 0; bottom: 0; padding: 14px 16px; font-family: var(--sans); font-size: 11px; color: #c7cfcb; background: linear-gradient(transparent, rgba(0,0,0,.6)); z-index: 2; }
/* Muted autoplay flyover fills the 4:3 frame (16:9 video, cover-cropped); click-to-play trailer replaces it */
.hero-media .hero-video-slot { position: absolute; inset: 0; overflow: hidden; z-index: 0; }
.hero-media .hero-video-slot iframe { position: absolute; top: 50%; left: 50%; width: 133.34%; height: 100%; transform: translate(-50%, -50%); border: 0; pointer-events: none; }
.hero-media a.play { z-index: 2; }
.hero-media.playing .play, .hero-media.playing .cap { display: none; }
.hero-media.playing .hero-video-slot iframe { top: 0; left: 0; width: 100%; height: 100%; transform: none; pointer-events: auto; }
.hero-reassure { font-family: var(--sans); font-size: 11px; color: var(--muted-3); margin-top: 10px; display: flex; align-items: center; gap: 7px; }
.hero-reassure::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--on-dark-accent-2); }

.section { padding: 64px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 32px; }
.section-head h2 { font-size: 30px; }

.roles { background: var(--raised); border-bottom: 1px solid var(--rule); }
.role-tabs { display: flex; justify-content: center; gap: 6px; flex-wrap: wrap; margin-bottom: 24px; }
.role-tab { font-family: var(--sans); font-size: 15px; font-weight: 600; background: none; border: 0; border-bottom: 3px solid transparent; padding: 8px 14px 10px; cursor: pointer; color: var(--ink-2); }
.role-tab[aria-selected="true"] { border-bottom-color: var(--accent); color: var(--accent-deep); }
.role-card { max-width: 720px; margin: 0 auto; background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 30px 36px; text-align: center; }
.role-card h3 { font-size: 22px; }
.role-card p { font-size: 16px; color: var(--ink-3); margin: 0 0 18px; }

.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.pcard { border: 1px solid var(--rule); background: var(--paper); border-radius: 8px; padding: 22px; display: flex; flex-direction: column; }
.pcard:hover { border-color: var(--accent); }
.pcard.dark { background: var(--dark); border-color: var(--dark); }
.pcard.dark:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.pcard.dark, .pcard.dark h3 { color: var(--on-dark); }
.pcard .kicker { margin-bottom: 8px; }
.pcard h3 { font-size: 17px; margin-bottom: 6px; }
.pcard .desc { font-size: 13.5px; color: var(--muted); flex: 1; }
.pcard.dark .desc { color: var(--on-dark-3); }
.pcard .meta { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--rule-2); font-family: var(--sans); font-size: 11px; color: var(--muted-3); text-transform: uppercase; letter-spacing: .06em; }
.pcard.dark .meta { border-top-color: var(--dark-3); color: var(--on-dark-6); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.mcard { border: 1px solid var(--rule); background: var(--paper); border-radius: 8px; padding: 18px 20px; text-decoration: none; display: block; color: inherit; }
.mcard:hover { border-color: var(--accent); }
.mcard .num { font-family: var(--mono); font-size: 15px; font-weight: 600; color: var(--accent); letter-spacing: .02em; }
.mcard h3 { font-size: 16px; margin: 6px 0 4px; }
.mcard .desc { font-size: 13px; color: var(--muted); }
.mcard.dark { background: var(--dark); border-color: var(--dark); }
.mcard.dark, .mcard.dark h3 { color: var(--on-dark); }
.mcard.dark .desc { color: var(--on-dark-3); }
.mcard.emph { border: 1px solid var(--accent); box-shadow: 0 0 0 3px var(--tint); }

.anatomy { display: grid; grid-template-columns: 1.15fr 1fr; border: 1px solid var(--rule); border-radius: 10px; overflow: hidden; margin-top: 28px; }
.anatomy .left { padding: 28px 30px; border-right: 1px solid var(--rule-2); }
.anatomy .right { padding: 28px 30px; background: var(--panel); }
.pause-box { background: var(--raised); border-radius: 6px; padding: 16px 18px; font-style: italic; color: var(--accent-deep); margin-top: 14px; }
.numlist { list-style: none; margin: 0; padding: 0; }
.numlist li { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 12px; }
.numlist .n { flex: none; width: 30px; height: 30px; border-radius: 50%; background: var(--tint); color: var(--accent); display: grid; place-items: center; font-family: var(--sans); font-size: 15px; font-weight: 600; }

.approach { background: var(--raised); }
.approach .wrap { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; padding: 60px 32px; align-items: start; }
.approach h2 { font-size: 28px; }
.stack-card { background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 20px 22px; margin-bottom: 14px; }
.stack-card h3 { font-size: 17px; margin-bottom: 6px; }

.production { background: var(--dark); color: var(--on-dark-2); }
.production .wrap { display: grid; grid-template-columns: .85fr 1.15fr; gap: 44px; padding: 60px 32px; align-items: start; }
.production h2 { color: var(--on-dark); font-size: 28px; }
.production .lead { color: var(--on-dark-4); }
.prod-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.prod-card { background: var(--dark-2); border: 1px solid var(--dark-3); border-radius: 8px; padding: 20px; text-decoration: none; color: var(--on-dark); }
.prod-card:hover { border-color: #4a463f; color: var(--on-dark); }
.prod-card .desc { color: var(--on-dark-6); font-size: 13px; margin-top: 6px; }

/* ---- Footer ---- */
.rd-footer { background: var(--paper); border-top: 1px solid var(--rule); }
.rd-footer .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; padding: 48px 32px 24px; }
.rd-footer h4 { font-family: var(--serif); font-size: 18px; }
.rd-footer .colhead { font-family: var(--sans); font-size: 11px; text-transform: uppercase; letter-spacing: .12em; color: var(--muted-2); margin-bottom: 12px; }
.rd-footer p { font-size: 14px; color: var(--muted); }
.rd-footer ul { list-style: none; margin: 0; padding: 0; }
.rd-footer li { margin-bottom: 8px; }
.rd-footer a { font-family: var(--sans); font-size: 14px; color: var(--ink-2); text-decoration: none; }
.rd-footer a:hover { color: var(--accent); text-decoration: underline; }
.rd-footer .libr { color: var(--accent); font-weight: 600; }
.rd-footbar { border-top: 1px solid var(--rule); }
.rd-footbar .wrap { padding: 14px 32px; font-family: var(--sans); font-size: 11px; color: var(--muted-2); }

/* ============================================================
   TEMPLATES A–F (content pages) — shared reading components
   ============================================================ */
.read-col { max-width: 780px; margin: 0 auto; padding: 56px 40px 72px; }
.mod-num { font-family: var(--mono); font-size: 15px; font-weight: 500; color: var(--rust); text-transform: uppercase; letter-spacing: .1em; }
.read-col h1 { font-size: 40px; line-height: 1.08; letter-spacing: -0.015em; text-wrap: balance; margin: 8px 0 10px; }
.meta-row { font-family: var(--sans); font-size: 13px; color: var(--muted); margin-bottom: 20px; }
.meta-row .sep { color: var(--rule-sep); margin: 0 8px; }
.overview { background: var(--raised); border-radius: 8px; padding: 22px 24px; margin: 24px 0; }
.overview .lbl, .section-lbl { font-family: var(--sans); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .12em; color: var(--accent); }
.overview ul { margin: 10px 0 0; padding-left: 20px; }
.overview li { font-size: 15px; margin-bottom: 6px; }
.prose { font-size: 17px; line-height: 1.72; color: var(--ink-prose); }
.prose p { margin: 0 0 1.1em; }
.prose h2 { font-size: 23px; margin: 1.6em 0 .5em; }
.prose h3 { font-size: 19px; margin: 1.4em 0 .4em; }
.pullquote { border-left: 3px solid var(--accent); padding-left: 20px; margin: 28px 0; font-style: italic; font-weight: 500; font-size: 22px; color: var(--accent-deep); }
.source-card { border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; margin: 24px 0; }
.source-card .strip { background: var(--panel); padding: 10px 16px; font-family: var(--sans); font-size: 10px; text-transform: uppercase; letter-spacing: .1em; color: var(--muted-2); border-bottom: 1px solid var(--rule); }
.source-card .quote { font-family: var(--mono); font-size: 14px; line-height: 1.7; padding: 16px; color: var(--ink-3); }
.source-card .gloss { padding: 0 16px 16px; font-size: 13.5px; color: var(--muted); }
.source-card .gloss b { color: var(--rust); }
.pause { background: var(--tint); border-radius: 8px; padding: 18px 20px; margin: 24px 0; }
.pause .prompt { font-style: italic; font-size: 16px; color: var(--accent-deep); margin-top: 6px; }
.takeaways { border-top: 2px solid var(--ink); padding-top: 18px; margin: 28px 0; }
.takeaways ul { margin: 10px 0 0; padding-left: 20px; }
.cite-block { background: var(--raised); border-radius: 8px; padding: 20px 24px; margin: 24px 0; }
.cite-block .cite { font-family: var(--mono); font-size: 12.5px; line-height: 1.6; color: var(--ink-3); margin-top: 8px; }
.prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 28px; }
.prevnext a { border: 1px solid var(--rule); border-radius: 8px; padding: 16px 18px; text-decoration: none; color: inherit; }
.prevnext a:hover { border-color: var(--accent); }
.prevnext .lbl { font-family: var(--sans); font-size: 11px; color: var(--muted-2); }
.prevnext .ttl { font-size: 15px; font-weight: 600; margin-top: 4px; }
.prevnext .next { text-align: right; }

/* Hub (B) */
.hub-band { background: var(--raised); border-bottom: 1px solid var(--rule); }
.hub-band .inner { max-width: 1076px; margin: 0 auto; padding: 48px 32px; }
.hub-band h1 { font-size: 38px; letter-spacing: -0.015em; max-width: 20em; }
.hub-band p { font-size: 17px; color: var(--ink-4); max-width: 40em; }
.hub-body { max-width: 1076px; margin: 0 auto; padding: 44px 32px 52px; }
/* Wide container for board/gallery/wide-grid pages whose content wants up to ~1400px */
.wide-col { max-width: 1400px; margin: 0 auto; padding: 48px 40px 64px; }
@media (max-width: 640px) { .wide-col { padding: 40px 20px 48px; } }
/* Full-bleed outer for the production board so its (doubled) inner cap isn't clipped */
.board-col { max-width: none; margin: 0 auto; padding: 48px 24px 64px; }
@media (max-width: 640px) { .board-col { padding: 40px 16px 48px; } }
/* <main> is always the full-width wrapper; the template container inside sets the width.
   Overrides the legacy `main { max-width:760px }` (and any inline main cap) that was
   silently squeezing every script-transformed page down to 760px. */
body main#main { max-width: none; margin-left: 0; margin-right: 0; width: auto; }
.group-head { display: flex; justify-content: space-between; align-items: baseline; margin: 0 0 16px; }
.group-head h2 { font-size: 22px; margin: 0; }
.group-head .hint { font-family: var(--sans); font-size: 12px; color: var(--muted); }
.group + .group { margin-top: 40px; }
.mcard.companion { background: var(--panel); }
.mcard.companion .num { color: var(--accent); }

/* Source (C) */
.src-layout { display: grid; grid-template-columns: 1fr 300px; max-width: 1076px; margin: 0 auto; }
.src-main { padding: 44px 40px 52px; border-right: 1px solid var(--rule-2); }
.src-eyebrow { color: var(--rust); }
.src-main h1 { font-size: 34px; }
.limits { background: var(--rust-bg); border: 1px solid var(--rule-3); border-radius: 8px; padding: 18px 20px; margin: 24px 0; }
.limits .lbl { color: var(--rust); font-family: var(--sans); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .1em; }
.src-rail { background: var(--panel); padding: 44px 26px; }
.src-rail .field { margin-bottom: 16px; }
.src-rail .field .k { font-family: var(--sans); font-size: 10px; text-transform: uppercase; letter-spacing: .1em; color: var(--muted-2); }
.src-rail .field .v { font-size: 14px; color: var(--ink); margin-top: 2px; }
.src-rail .divider { border-top: 1px solid var(--rule); margin: 20px 0; }

/* Article/utility (D) */
.doc-layout { display: grid; grid-template-columns: 250px 1fr; gap: 40px; max-width: 1076px; margin: 0 auto; padding: 32px; }
.doc-toc { position: sticky; top: 82px; align-self: start; border-right: 1px solid var(--rule-2); padding-right: 20px; }
.doc-toc a { display: block; font-family: var(--sans); font-size: 13.5px; color: var(--ink-2); text-decoration: none; padding: 6px 10px; border-radius: 5px; }
.doc-toc a.active { background: var(--raised); color: var(--accent-deep); font-weight: 600; }
.doc-body { max-width: 720px; }
.doc-body h1 { font-size: 38px; }
.doc-body .lead { font-size: 17px; }
.callout { background: var(--raised); border-radius: 8px; padding: 18px 22px; margin: 20px 0; }

/* Teaching (E) */
.teach-col { max-width: 840px; margin: 0 auto; padding: 56px 40px 72px; }
.teach-col .eyebrow-rust { color: var(--rust); font-family: var(--sans); font-weight: 600; text-transform: uppercase; letter-spacing: .14em; font-size: 11px; }
.spec-strip { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; margin: 20px 0; }
.spec-strip .cell { padding: 14px 16px; border-right: 1px solid var(--rule-2); }
.spec-strip .cell:last-child { border-right: 0; }
.spec-strip .k { font-family: var(--sans); font-size: 9px; text-transform: uppercase; letter-spacing: .1em; color: var(--muted-2); }
.spec-strip .v { font-size: 14px; font-weight: 600; margin-top: 4px; }
.objectives { background: var(--tint); border-radius: 8px; padding: 18px 22px; margin: 20px 0; }
.lesson-step { display: flex; gap: 16px; border: 1px solid var(--rule); border-radius: 8px; padding: 16px 18px; margin-bottom: 10px; }
.lesson-step .time { flex: none; width: 64px; font-family: var(--mono); font-size: 13px; color: var(--accent); }
.lesson-step .ttl { font-size: 14.5px; font-weight: 600; }

/* Reference (F) */
.ref-col { max-width: 840px; margin: 0 auto; padding: 56px 40px 72px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 24px; }
.filter-chip { font-family: var(--sans); font-size: 13px; padding: 6px 14px; border-radius: 100px; border: 1px solid #d8d1c2; background: none; color: var(--ink-2); cursor: pointer; }
.filter-chip.active { background: var(--accent-deep); color: #eaf2ef; border-color: var(--accent-deep); }
.glossary { border-top: 2px solid var(--ink); }
.gloss-row { display: grid; grid-template-columns: 220px 1fr; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--rule-2); }
.gloss-row .term { font-family: var(--serif); font-weight: 700; font-size: 17px; }
.gloss-row .cat { font-family: var(--sans); font-size: 11px; color: var(--muted-2); margin-top: 2px; }
.gloss-row .def { font-size: 15px; }
.bib-group .lbl { font-family: var(--sans); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .1em; color: var(--accent); margin: 24px 0 10px; }
.bib-item { font-size: 14.5px; padding-left: 28px; text-indent: -28px; margin-bottom: 12px; }
.bib-item .annot { display: block; text-indent: 0; font-size: 13px; color: var(--muted); margin-top: 3px; }

/* Timeline / audio / form (interactive patterns) */
.timeline { border-left: 2px solid #d8d1c2; padding-left: 24px; margin: 24px 0; }
.tl-entry { position: relative; margin-bottom: 22px; }
.tl-entry::before { content: ""; position: absolute; left: -31px; top: 4px; width: 10px; height: 10px; border-radius: 50%; background: var(--muted-2); border: 2px solid var(--paper); }
.tl-entry.key::before { background: var(--accent); }
.tl-entry .yr { font-family: var(--mono); color: var(--rust); font-size: 13px; }
.tl-entry .ttl { font-family: var(--serif); font-weight: 600; font-size: 16px; }
.audio-card { background: var(--dark); border-radius: 10px; padding: 20px; color: var(--on-dark); margin: 16px 0; }
.audio-card .counter { font-family: var(--sans); font-size: 9px; text-transform: uppercase; letter-spacing: .1em; color: var(--on-dark-accent); }
.audio-card .title { font-weight: 600; font-size: 17px; margin: 4px 0 12px; }
.audio-card .transcript-link { color: var(--on-dark-accent-3); font-family: var(--sans); font-size: 13px; }
.form-card { border: 1px solid var(--rule); border-radius: 8px; padding: 24px; }
.form-card label { font-family: var(--sans); font-size: 13px; font-weight: 600; display: block; margin-bottom: 6px; }
.form-card textarea, .form-card input[type="text"] { width: 100%; border: 1px solid #d8d1c2; background: #fff; border-radius: 6px; padding: 10px 12px; font-family: var(--serif); }
.form-micro { font-family: var(--sans); font-size: 11px; color: var(--muted-2); margin-top: 8px; }

/* ---- Responsive ---- */
@media (max-width: 860px) {
  .hero .wrap, .approach .wrap, .production .wrap, .anatomy, .src-layout, .doc-layout { grid-template-columns: 1fr; }
  .cards-4, .grid-3, .prod-grid, .spec-strip { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 38px; }
  .doc-toc, .src-rail { border-right: 0; position: static; }
  .src-main { border-right: 0; border-bottom: 1px solid var(--rule-2); }
}
@media (max-width: 560px) {
  .cards-4, .grid-3, .prod-grid, .spec-strip, .prevnext, .gloss-row { grid-template-columns: 1fr; }
  .wrap { padding: 0 20px; }
  .hero h1 { font-size: 32px; }
}