/* ============================================================
   Thai Course — design system
   Adapted from corpus-site/static/css/site.css — kept the generic
   design tokens, header/nav/footer, page-head, book-grid/card,
   toc + prose reader layout, and basic buttons. Authentication and the
   minimal administrator table were restored when account gating became
   part of this site; dictionary and class-management UI remain omitted.
   ============================================================ */
:root {
  /* Colour tokens — swap these for your own palette */
  --bg:        #F4EDDE;
  --surface:   #FBF6EB;
  --surface-2: #FFFDF7;
  --ink:       #2E2A23;
  --ink-soft:  #4A4337;
  --muted:     #7A715F;
  --line:      #E2D7C0;
  --line-soft: #ECE3D1;
  --accent:    #6E2B2B;
  --accent-2:  #8A6D3B;
  --link:      #7A3026;
  --link-hover:#9c3a2c;

  --radius: 10px;
  --shadow: 0 1px 2px rgba(60,46,24,.06), 0 6px 18px rgba(60,46,24,.06);
  --maxw: 1120px;

  --serif-thai: "Noto Serif Thai", "Noto Sans Thai", serif;
  --font-body:  "Georgia", "Times New Roman", var(--serif-thai), serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html { scroll-padding-top: 6.5rem; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
}

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; text-underline-offset: 2px; }

/* ---------- header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  position: sticky; top: 0; z-index: 50;
}
.site-header .bar {
  max-width: var(--maxw); margin: 0 auto; padding: .7rem 1.5rem;
  display: flex; align-items: baseline; gap: 1.4rem;
  flex-wrap: wrap; row-gap: .15rem;
}
.brand { display: flex; align-items: baseline; gap: .6rem; white-space: nowrap; }
.brand .logo { font-size: 1.35rem; font-weight: 700; letter-spacing: .02em; color: var(--ink); }
.brand .sub  { font-size: .82rem; color: var(--muted); }
.brand a { color: inherit; }
.brand a:hover { text-decoration: none; }
.nav { flex-basis: 100%; display: flex; align-items: baseline; gap: .85rem;
       flex-wrap: wrap; row-gap: .15rem; font-family: var(--sans); }
.nav a { color: var(--ink-soft); font-size: .9rem; white-space: nowrap; font-family: var(--sans); }
.nav a.active { color: var(--accent); font-weight: 600; }
.nav-account { margin-left: auto; color: var(--muted); font-size: .78rem; overflow-wrap: anywhere; }
.nav-form { display: inline; margin: 0; }
.nav-button { border: 0; padding: 0; background: none; color: var(--link); cursor: pointer;
  font: .9rem/1.7 var(--sans); }
.nav-button:hover { color: var(--link-hover); text-decoration: underline; text-underline-offset: 2px; }

/* ---------- containers ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 2.2rem 1.5rem 4rem; }
.page-head { margin-bottom: 1.6rem; }
.page-head h1 { font-size: 1.9rem; margin: 0 0 .35rem; letter-spacing: .01em; }
.page-head .lede { color: var(--muted); max-width: 60ch; margin: 0; font-size: 1rem; }
.kicker { color: var(--accent-2); font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; margin: 0 0 .5rem; }

section.block { margin: 2.6rem 0; }
section.block > h2 {
  font-size: 1.25rem; margin: 0 0 1rem; padding-bottom: .4rem;
  border-bottom: 2px solid var(--line); color: var(--ink);
}

/* ---------- card grid (lesson list / etc.) ---------- */
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px,1fr)); gap: .9rem; }
.book-card {
  display: block; background: var(--surface-2); border: 1px solid var(--line);
  border-left: 4px solid var(--accent-2); border-radius: var(--radius);
  padding: .95rem 1.1rem; box-shadow: var(--shadow); transition: transform .12s, box-shadow .12s;
}
.book-card:hover { transform: translateY(-2px); text-decoration: none; box-shadow: 0 4px 10px rgba(60,46,24,.1), 0 14px 30px rgba(60,46,24,.1); }
.book-card .bt { font-weight: 700; color: var(--ink); line-height: 1.35; }

/* ---------- buttons ---------- */
.btn {
  padding: .65rem 1rem; font: inherit; font-weight: 600; cursor: pointer;
  background: var(--accent); color: #fbf3e6; border: 0; border-radius: 8px;
}
.btn:hover { background: #7d3331; }
.btn, .btn:hover { color: #fbf3e6; text-decoration: none; }
.btn-sm {
  font: inherit; font-size: .85rem; padding: .3rem .9rem; border-radius: 7px;
  cursor: pointer; border: 0; background: var(--accent); color: #fbf3e6;
}
.btn-sm:hover { background: #7d3331; color: #fbf3e6; }

/* ---------- lesson reader: TOC + prose ---------- */
.reader { display: grid; grid-template-columns: 220px minmax(0,1fr); gap: 2.2rem; align-items: start; }
.toc { position: sticky; top: 72px; max-height: calc(100vh - 92px); overflow: auto; font-size: .86rem; border-right: 1px solid var(--line); padding-right: 1rem; }
.toc .toc-title { font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; color: var(--accent-2); margin-bottom: .6rem; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li a { display: block; color: var(--ink-soft); padding: .15rem 0; line-height: 1.4; }
.toc li a:hover { color: var(--accent); text-decoration: none; }
.toc li.lvl-2 { padding-left: .8rem; }
.toc li.lvl-3 { padding-left: 1.6rem; font-size: .82rem; color: var(--muted); }

.doc { max-width: 74ch; }
.doc-head { margin-bottom: 1.6rem; padding-bottom: 1rem; border-bottom: 2px solid var(--line); }
.doc-head h1 { margin: 0 0 .3rem; font-size: 1.8rem; }
.prose h1 { font-size: 1.55rem; margin: 2rem 0 .8rem; padding-bottom: .25rem; border-bottom: 1px solid var(--line-soft); }
.prose h2 { font-size: 1.3rem; margin: 1.8rem 0 .6rem; color: var(--ink); }
.prose h3 { font-size: 1.1rem; margin: 1.4rem 0 .5rem; color: var(--ink-soft); }
.prose p { margin: .8rem 0; }
.prose table { border-collapse: collapse; margin: 1.2rem 0; font-size: .95rem; width: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: .4rem .7rem; text-align: left; vertical-align: top; }
.prose th { background: var(--surface); }
.prose code { background: var(--surface); padding: .1rem .35rem; border-radius: 4px; font-size: .9em; }
.prose pre { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: .9rem 1rem; overflow: auto; }
.prose blockquote { border-left: 3px solid var(--accent-2); margin: 1rem 0; padding: .2rem 1rem; color: var(--ink-soft); background: var(--surface); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
.prose img { max-width: 100%; height: auto; }
.pronunciation-button {
  margin-left: .28rem; padding: .06rem .22rem; border: 0; border-radius: 4px;
  background: transparent; color: var(--accent); cursor: pointer; font-size: .9em;
  line-height: 1; vertical-align: .05em;
}
.pronunciation-button:hover, .pronunciation-button:focus-visible {
  background: rgba(110,43,43,.1); color: var(--link-hover);
}
.pronunciation-button.is-playing { background: rgba(110,43,43,.14); color: var(--link-hover); }
.pronunciation-button--synthesized { opacity: .72; border-bottom: 1px dotted currentColor; }
.pronunciation-button--synthesized.is-playing { opacity: 1; }
.tts-toggle {
  margin-top: .65rem; padding: .38rem .68rem; border: 1px solid var(--line);
  border-radius: 7px; background: var(--surface); color: var(--accent); cursor: pointer;
  font: 600 .78rem/1.4 var(--sans);
}
.tts-toggle:hover, .tts-toggle:focus-visible { background: var(--surface-2); border-color: var(--accent-2); }
.tts-toggle.is-speaking { background: var(--accent); border-color: var(--accent); color: #fbf3e6; }

.back { font-size: .88rem; color: var(--muted); margin-bottom: 1rem; display: inline-block; }
.dim { color: var(--muted); font-size: .85em; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* ---------- home ---------- */
.hero {
  padding: 2rem 0 2.5rem; border-bottom: 1px solid var(--line);
  background: radial-gradient(circle at 90% 15%, rgba(138,109,59,.12), transparent 33%);
}
.hero h1 { font-size: clamp(2.5rem, 7vw, 5rem); line-height: 1; margin: .15rem 0 1rem; letter-spacing: -.035em; }
.hero .lede { max-width: 64ch; color: var(--ink-soft); font-size: 1.12rem; }
.hero-actions { display: flex; align-items: center; gap: 1.2rem; margin: 1.6rem 0 2rem; flex-wrap: wrap; }
.text-link { font-family: var(--sans); font-size: .9rem; font-weight: 600; }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); max-width: 720px; margin: 0; }
.stats div { border-left: 1px solid var(--line); padding: .25rem 1rem; }
.stats div:first-child { padding-left: 0; border-left: 0; }
.stats dt { font: 600 1.55rem/1 var(--sans); color: var(--accent); }
.stats dd { margin: .3rem 0 0; font: .74rem/1.35 var(--sans); color: var(--muted); text-transform: uppercase; letter-spacing: .07em; }
.portal-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 2.4rem 0; }
.portal-grid.single-portal { grid-template-columns: minmax(0, 1fr); max-width: 760px; }
.portal-card { min-height: 270px; display: grid; grid-template-columns: 4rem 1fr; gap: 1rem;
  padding: 1.5rem; color: var(--ink); background: var(--surface-2); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); transition: transform .15s, box-shadow .15s; }
.portal-card:hover { color: var(--ink); text-decoration: none; transform: translateY(-3px); box-shadow: 0 10px 28px rgba(60,46,24,.11); }
.portal-card h2 { margin: .2rem 0 .7rem; font-size: 1.7rem; }
.portal-card p:not(.eyebrow) { color: var(--ink-soft); max-width: 36ch; }
.portal-number { font: 600 .8rem/1 var(--sans); color: var(--accent-2); padding-top: .45rem; }
.source-portal { border-top: 5px solid var(--accent-2); }
.course-portal { border-top: 5px solid var(--accent); }
.eyebrow { margin: 0; font: .72rem/1.4 var(--sans); color: var(--accent-2); text-transform: uppercase; letter-spacing: .11em; }
.card-cta { display: inline-block; margin-top: 1rem; font: 600 .84rem/1.4 var(--sans); color: var(--accent); }
.approach { max-width: 760px; }
.approach > h2 { border: 0; padding: 0; font-size: 1.45rem; }

/* ---------- library and books ---------- */
.split-head { display: flex; gap: 2rem; justify-content: space-between; align-items: end; }
.source-note { max-width: 40ch; margin: 0; padding: .8rem 1rem; border-left: 3px solid var(--accent-2);
  color: var(--muted); background: rgba(255,253,247,.55); font-size: .83rem; }
.source-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.source-card { padding: 1.2rem 1.3rem; }
.source-card .bt { margin: .7rem 0 0; font-size: 1.25rem; }
.source-card p { color: var(--ink-soft); }
.book-meta, .card-actions { display: flex; justify-content: space-between; align-items: center; gap: .75rem; flex-wrap: wrap; }
.book-meta { font: .72rem/1.4 var(--sans); color: var(--muted); text-transform: uppercase; letter-spacing: .07em; }
.byline { margin-top: .1rem; font-size: .88rem; color: var(--muted) !important; }
.role-tag, .track-pill { display: inline-block; border: 1px solid var(--line); border-radius: 999px;
  padding: .15rem .6rem; font: .72rem/1.4 var(--sans); color: var(--accent-2) !important; background: var(--surface); }
.card-actions { margin-top: 1rem; font: .82rem/1.4 var(--sans); }
.source-reader-wrap { max-width: 940px; }
.book-reader-head { padding: 1.2rem 0 1.4rem; border-bottom: 2px solid var(--line); }
.book-reader-head.compact { padding-bottom: .8rem; }
.book-reader-head h1 { margin: .1rem 0 .3rem; font-size: clamp(2rem, 5vw, 3rem); line-height: 1.15; }
.reader-tools { display: flex; align-items: start; gap: 1rem; margin-top: 1.2rem; flex-wrap: wrap; }
.page-jump { display: flex; align-items: center; gap: .5rem; font: .82rem/1.4 var(--sans); }
.page-jump input { width: 5rem; padding: .34rem .45rem; border: 1px solid var(--line); border-radius: 6px;
  background: var(--surface-2); color: var(--ink); font: inherit; }
.page-index { flex: 1; min-width: 260px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); }
.page-index summary { cursor: pointer; padding: .42rem .7rem; color: var(--accent); font: .82rem/1.4 var(--sans); }
.page-index nav { display: grid; grid-template-columns: repeat(auto-fill, minmax(2.4rem, 1fr)); gap: .25rem;
  padding: .55rem .7rem .75rem; border-top: 1px solid var(--line); max-height: 180px; overflow: auto; }
.page-index nav a { text-align: center; padding: .2rem; border-radius: 4px; font: .72rem/1.3 var(--sans); }
.page-index nav a:hover { background: var(--surface-2); text-decoration: none; }
.source-pages { max-width: 800px; margin: 0 auto; }
.source-page { position: relative; margin: 1.6rem 0; padding: 1.8rem 2rem; background: var(--surface-2);
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.source-page:target { outline: 3px solid rgba(110,43,43,.18); }
.page-badge-row { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline;
  margin: -2.5rem 0 1rem; }
.page-badge { display: inline-block; padding: .14rem .65rem; color: #fff; background: var(--accent);
  border-radius: 999px; font: .73rem/1.4 var(--sans); letter-spacing: .04em; }
a.page-badge:hover { color: #fff; text-decoration: none; background: #7d3331; }
.locator { color: var(--muted); font: .66rem/1.3 var(--sans); overflow-wrap: anywhere; }
.ocr-prose { line-height: 1.8; overflow-wrap: anywhere; }
.ocr-prose h1 { margin: 1.1rem 0 .7rem; font-size: 1.4rem; line-height: 1.35; }
.ocr-prose h2 { margin: 1rem 0 .55rem; font-size: 1.18rem; color: var(--accent); }
.ocr-prose h3 { margin: .9rem 0 .45rem; font-size: 1.05rem; color: var(--ink-soft); }
.ocr-prose p { margin: .7rem 0; }
.table-wrap { max-width: 100%; overflow-x: auto; }
.ocr-prose table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: .92rem; }
.ocr-prose td, .ocr-prose th { border: 1px solid var(--line); padding: .38rem .6rem; text-align: left; vertical-align: top; }
.ocr-prose th { background: var(--surface); }
.needs-check { display: inline-block; margin: .2rem 0; padding: .18rem .5rem; background: #fff0bd;
  color: #70520b; border: 1px solid #e2c769; border-radius: 5px; font: .82rem/1.5 var(--sans); }
.page-nav { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: center;
  padding: 1rem 0; font: .82rem/1.4 var(--sans); }
.page-nav > :last-child { text-align: right; }
.single-page { margin-top: 1.4rem; min-height: 45vh; }

/* ---------- course tracks and lesson list ---------- */
.track-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.track-card { min-height: 250px; display: grid; grid-template-columns: 4.2rem 1fr; gap: 1rem;
  padding: 1.5rem; color: var(--ink); background: var(--surface-2); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); }
.track-card:hover { text-decoration: none; color: var(--ink); transform: translateY(-2px); }
.track-en { border-top: 5px solid #3e6170; }
.track-fr { border-top: 5px solid var(--accent); }
.track-code { display: grid; place-items: center; width: 3.2rem; height: 3.2rem; border-radius: 50%;
  background: var(--surface); color: var(--accent); font: 600 .8rem/1 var(--sans); letter-spacing: .08em; }
.track-card h2 { margin: .2rem 0 .7rem; font-size: 1.55rem; }
.track-card p:not(.eyebrow) { color: var(--ink-soft); }
.notice-box { margin-top: 1.5rem; padding: 1rem 1.2rem; border: 1px solid var(--line);
  border-left: 4px solid var(--accent-2); background: rgba(251,246,235,.7); color: var(--ink-soft); font-size: .9rem; }
.count-medallion { flex: 0 0 auto; display: grid; place-items: center; width: 88px; height: 88px;
  border: 1px solid var(--line); border-radius: 50%; background: var(--surface); color: var(--accent);
  font: 600 1.5rem/1 var(--sans); }
.count-medallion small { display: block; color: var(--muted); font: .66rem/1 var(--sans); text-transform: uppercase; }
.lesson-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.lesson-card { display: grid; grid-template-columns: 4rem minmax(0, 1fr) 2rem; gap: 1rem; align-items: center;
  padding: 1rem .4rem; border-bottom: 1px solid var(--line); color: var(--ink); }
.lesson-card:hover { text-decoration: none; color: var(--accent); background: rgba(255,253,247,.35); }
.lesson-number { color: var(--accent-2); font: .78rem/1.4 var(--sans); letter-spacing: .09em; }
.lesson-title { font-weight: 700; line-height: 1.4; }
.lesson-arrow { justify-self: end; color: var(--muted); }

/* ---------- four-corner lesson treatment ---------- */
.lesson-reader { grid-template-columns: 235px minmax(0, 1fr); }
.track-pill { margin-bottom: .8rem; }
.corner-key { display: grid; gap: .28rem; margin-top: 1.2rem; padding-top: .8rem; border-top: 1px solid var(--line); }
.corner-key span { padding-left: .7rem; border-left: 3px solid; color: var(--muted); font: .7rem/1.5 var(--sans); }
.key-input { border-color: #527865 !important; }
.key-construction { border-color: #9a6a37 !important; }
.key-explanation { border-color: #446b83 !important; }
.key-bridge { border-color: #8b5470 !important; }
.lesson-corner { position: relative; margin: 2.2rem 0; padding: 1.4rem 1.35rem .8rem;
  border: 1px solid var(--line); border-left: 5px solid; border-radius: 0 var(--radius) var(--radius) 0; }
.lesson-corner::before { content: attr(data-corner-label); position: absolute; top: -.72rem; left: 1rem;
  padding: .15rem .55rem; border-radius: 999px; background: var(--surface-2); border: 1px solid currentColor;
  font: 600 .68rem/1.4 var(--sans); letter-spacing: .04em; }
.corner-input { border-left-color: #527865; background: rgba(82,120,101,.055); color: #355d49; }
.corner-construction { border-left-color: #9a6a37; background: rgba(154,106,55,.055); color: #75491f; }
.corner-explanation { border-left-color: #446b83; background: rgba(68,107,131,.055); color: #315c75; }
.corner-bridge { border-left-color: #8b5470; background: rgba(139,84,112,.05); color: #713d58; }
.lesson-corner > * { color: var(--ink); }
.lesson-corner > h2:first-of-type { margin-top: .35rem; }
.lesson-prose > h1:first-child { display: none; }
.lesson-pagination { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 2rem;
  padding-top: 1.2rem; border-top: 1px solid var(--line); font: .82rem/1.45 var(--sans); }
.lesson-pagination > :last-child { text-align: right; }

/* ---------- authentication ---------- */
.auth-wrap { min-height: 72vh; display: grid; place-items: center; padding: 2rem 1rem; }
.auth-card { width: 100%; max-width: 420px; padding: 2rem 1.9rem; background: var(--surface-2);
  border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); }
.auth-card h1 { margin: 0 0 .2rem; font-size: 1.6rem; }
.auth-card .sub { margin: 0 0 1.4rem; color: var(--muted); font-size: .9rem; }
.auth-card .btn { width: 100%; }
.field { margin-bottom: 1rem; }
.field label { display: block; margin-bottom: .3rem; color: var(--ink-soft); font: .85rem/1.4 var(--sans); }
.field input { width: 100%; padding: .6rem .7rem; color: var(--ink); background: var(--surface);
  border: 1px solid var(--line); border-radius: 8px; font: .95rem/1.4 var(--sans); }
.field input:focus { outline: 2px solid var(--accent-2); outline-offset: 0; border-color: var(--accent-2); }
.hint { margin: .35rem 0 0; color: var(--muted); font-size: .8rem; }
.auth-foot { margin: 1.2rem 0 0; color: var(--muted); text-align: center; font-size: .88rem; }
.flash { margin-bottom: 1rem; padding: .6rem .8rem; border-radius: 8px; font-size: .88rem; }
.flash.error { color: #8c3026; background: #f7e3df; border: 1px solid #e9c4bd; }
.hp { position: absolute; left: -9999px; top: -9999px; height: 0; overflow: hidden; }

/* ---------- administrator list ---------- */
.table-scroll { max-width: 100%; overflow-x: auto; }
.admin-table { width: 100%; border-collapse: collapse; margin-top: .8rem; font: .9rem/1.5 var(--sans); }
.admin-table th, .admin-table td { padding: .5rem .75rem; text-align: left; vertical-align: middle;
  border: 1px solid var(--line); }
.admin-table th { color: var(--ink-soft); background: var(--surface); font-size: .82rem; }
.admin-table tr:hover td { background: var(--surface-2); }
.admin-table .muted { color: var(--muted); font-size: .83rem; }
.role-badge { display: inline-block; padding: .12rem .55rem; color: #4f6a48; background: #e7eee2;
  border: 1px solid #cfe0c4; border-radius: 999px; font-size: .72rem; }
.error-page { min-height: 55vh; padding-top: 5rem; }

/* ---------- lang switcher ---------- */
.lang-bar{margin-left:auto;display:flex;gap:.2rem;align-items:baseline;font-size:.82rem;font-family:var(--sans)}
.lang-link{color:var(--accent-2);text-decoration:none;padding:.12rem .55rem;border-radius:.4rem;line-height:1.4}
.lang-link:hover{background:rgba(138,109,59,.12)}
.lang-link.active{background:var(--accent);color:#fff}

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); margin-top: 3rem; }
.foot-inner { max-width: var(--maxw); margin: 0 auto; padding: 1.2rem 1.5rem; font-size: .85rem; color: var(--muted); font-family: var(--sans); }
.foot-sep { margin: 0 .5rem; }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .reader { grid-template-columns: 1fr; }
  .toc { position: static; max-height: none; border-right: 0; border-bottom: 1px solid var(--line); padding-right: 0; padding-bottom: 1rem; margin-bottom: 1rem; }
  .split-head { align-items: start; }
}

@media (max-width: 680px) {
  .wrap { padding: 1.5rem 1rem 3rem; }
  .brand .sub { display: none; }
  .lang-bar { margin-left: 0; }
  .stats { grid-template-columns: 1fr 1fr; gap: 1rem 0; }
  .stats div:nth-child(3) { padding-left: 0; border-left: 0; }
  .portal-grid, .source-grid, .track-grid { grid-template-columns: 1fr; }
  .portal-card, .track-card { min-height: 0; grid-template-columns: 2.5rem 1fr; padding: 1.2rem 1rem; }
  .track-code { width: 2.5rem; height: 2.5rem; }
  .split-head { display: block; }
  .source-note { margin-top: 1rem; }
  .count-medallion { width: auto; height: auto; display: inline-flex; gap: .4rem; margin-top: 1rem; padding: .4rem .75rem; border-radius: 999px; }
  .source-page { padding: 1.5rem 1rem; }
  .locator { display: none; }
  .page-nav { grid-template-columns: 1fr 1fr; }
  .page-nav .page-jump { grid-column: 1 / -1; grid-row: 1; justify-content: center; }
  .page-jump label { display: none; }
  .lesson-card { grid-template-columns: 2.4rem minmax(0, 1fr) 1rem; gap: .55rem; }
  .lesson-corner { margin-left: -.35rem; margin-right: -.35rem; padding: 1.3rem .8rem .7rem; }
  .prose table { display: block; max-width: 100%; overflow-x: auto; }
}