/* ============================================================
   Carnet de seconde — feuille de style unique
   Direction : papier chaud, encre noire, vert profond, terracotta.
   ============================================================ */

:root {
  --paper: #f6f2e9;
  --paper-2: #efe9dc;
  --paper-3: #e8e0d1;
  --ink: #171614;
  --ink-soft: #4c4841;
  --muted: #6f6a61;
  --line: #d8d0c0;
  --line-soft: #e6dfd2;
  --card: #fbf8f1;
  --accent: #1f513c;
  --accent-soft: #e7efe9;
  --accent-2: #b04a2f;
  --accent-2-soft: #f7e9e2;
  --gold: #a97c25;
  --gold-soft: #f5eeda;
  --shadow: 0 1px 0 rgba(23, 22, 20, .04), 0 18px 40px -28px rgba(23, 22, 20, .45);
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --radius: 6px;
  --measure: 70ch;
}

[data-theme="dark"] {
  --paper: #151713;
  --paper-2: #1c1f19;
  --paper-3: #24271f;
  --ink: #f1ecdf;
  --ink-soft: #c9c2b3;
  --muted: #9c9586;
  --line: #3a3d33;
  --line-soft: #2b2e26;
  --card: #1b1e18;
  --accent: #8fc7a8;
  --accent-soft: #1f3027;
  --accent-2: #e08a6e;
  --accent-2-soft: #36231d;
  --gold: #d4ad5c;
  --gold-soft: #332b1c;
  --shadow: 0 1px 0 rgba(0, 0, 0, .2), 0 18px 40px -28px rgba(0, 0, 0, .8);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 92px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent); color: var(--paper); }

a { color: var(--accent); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent-2); }

img, svg { max-width: 100%; height: auto; }

button, input { font: inherit; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 100;
  background: var(--ink); color: var(--paper); padding: 10px 16px; border-radius: 4px;
}
.skip-link:focus { left: 8px; }
.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.wrap { width: 100%; max-width: 1160px; margin-inline: auto; padding-inline: clamp(20px, 4vw, 48px); }
.narrow { max-width: 860px; }

/* ---------- header ---------- */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}
.head-inner {
  max-width: 1160px; margin-inline: auto; padding: 14px clamp(20px, 4vw, 48px);
  display: flex; align-items: center; gap: 28px;
}
.brand {
  font-family: var(--serif); font-size: 1.55rem; font-weight: 600; letter-spacing: -.03em;
  color: var(--ink); text-decoration: none; line-height: 1;
}
.brand-dot { color: var(--accent-2); }
.main-nav { display: flex; gap: 22px; margin-left: auto; }
.main-nav a {
  color: var(--ink-soft); text-decoration: none; font-size: .92rem; font-weight: 500;
  padding-block: 6px; border-bottom: 2px solid transparent;
}
.main-nav a:hover { color: var(--ink); border-bottom-color: var(--accent); }
.theme-btn, .search-btn {
  width: 38px; height: 38px; display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 50%; background: var(--card); color: var(--ink-soft);
  cursor: pointer; transition: border-color .2s, color .2s, transform .2s;
}
.theme-btn:hover, .search-btn:hover { border-color: var(--accent); color: var(--accent); }
.theme-btn:hover { transform: rotate(12deg); }
.head-actions { display: flex; align-items: center; gap: 8px; margin-left: 0; }

/* ---------- typography ---------- */
h1, h2, h3 { font-family: var(--serif); font-weight: 600; color: var(--ink); }
h1 { font-size: clamp(2.2rem, 4.8vw, 4.2rem); line-height: 1.02; letter-spacing: -.035em; margin: 0 0 22px; }
h2 { font-size: clamp(1.55rem, 2.8vw, 2.15rem); line-height: 1.12; letter-spacing: -.02em; margin: 0 0 18px; }
h3 { font-size: 1.18rem; line-height: 1.3; margin: 0 0 10px; }
p { margin: 0 0 1em; }
.lede { font-size: clamp(1.06rem, 1.5vw, 1.22rem); line-height: 1.55; color: var(--ink-soft); max-width: 62ch; }
.eyebrow {
  font-family: var(--sans); font-size: .74rem; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; color: var(--accent-2); margin: 0 0 14px;
}
.small { font-size: .92rem; color: var(--muted); }
.section-intro { color: var(--ink-soft); max-width: 68ch; }
.mono { font-family: var(--mono); font-size: .9em; }
.formula {
  font-family: var(--mono); font-size: .95rem; background: var(--paper-3); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 12px 14px; margin: 14px 0; overflow-x: auto;
}
.figure { margin: 22px 0; }
.figure figcaption { font-size: .78rem; color: var(--muted); margin-top: 8px; }
.tax-label { display: flex; gap: 8px; align-items: center; margin-top: 10px; font-size: .85rem; color: var(--ink-soft); cursor: pointer; }
.tax-label input { accent-color: var(--accent); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: 999px; font-size: .92rem; font-weight: 650;
  text-decoration: none; border: 1px solid transparent; cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .2s;
}
.btn-primary { background: var(--accent); color: var(--paper); }
.btn-primary:hover { background: var(--ink); color: var(--paper); transform: translateY(-1px); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); background: var(--card); }

/* ---------- hero ---------- */
.hero { padding-block: clamp(54px, 9vw, 112px) clamp(48px, 7vw, 90px); border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: clamp(36px, 6vw, 78px); align-items: start; }
.hero h1 em { color: var(--accent); font-style: italic; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-search { display: flex; gap: 8px; margin-top: 18px; max-width: 540px; }
.hero-search input { flex: 1; min-width: 0; padding: 11px 16px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); color: var(--ink); font-size: .92rem; }
.hero-search input:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.hero-search .btn { flex: 0 0 auto; }
.hero-note { margin-top: 22px; font-size: .82rem; color: var(--muted); }
.hero-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 26px 20px; box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.hero-card::before { content: ""; position: absolute; inset: 0 0 auto; height: 4px; background: var(--accent); }
.hero-card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.pill {
  display: inline-block; padding: 4px 10px; border-radius: 999px; background: var(--accent);
  color: var(--paper); font-size: .7rem; font-weight: 800; letter-spacing: .12em;
}
.hero-card-meta { font-size: .78rem; color: var(--muted); }
.hero-card-title { font-family: var(--serif); font-size: 1.35rem; line-height: 1.2; margin-bottom: 18px; }
.hero-list { list-style: none; margin: 0 0 18px; padding: 0; }
.hero-list li {
  display: flex; gap: 12px; align-items: baseline; padding: 9px 0; border-top: 1px solid var(--line-soft);
  font-size: .9rem; color: var(--ink-soft);
}
.hero-list li span { font-family: var(--mono); font-size: .72rem; color: var(--accent-2); }
.hero-card-foot {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  border-top: 1px solid var(--line); padding-top: 14px; font-size: .8rem; color: var(--muted);
}
.hero-card-foot a { font-weight: 600; text-decoration: none; }

/* ---------- sections ---------- */
.section { padding-block: clamp(56px, 8vw, 96px); }
.section-alt { background: var(--paper-2); border-block: 1px solid var(--line); }
.section-head { max-width: 720px; margin-bottom: 42px; }
.section-head p { color: var(--ink-soft); margin-bottom: 0; }
.section-first { padding-top: clamp(46px, 7vw, 76px); }

/* ---------- chapter cards ---------- */
.chapter-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.chapter-card {
  display: flex; flex-direction: column; gap: 8px; position: relative;
  padding: 24px 22px 18px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none; color: var(--ink); box-shadow: var(--shadow);
  transition: transform .22s ease, border-color .22s ease;
}
.chapter-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card-num { font-family: var(--serif); font-size: 2.2rem; line-height: 1; color: var(--line); letter-spacing: -.04em; }
.card-theme { font-size: .68rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; color: var(--accent-2); }
.chapter-card h3 { font-size: 1.2rem; margin: 2px 0 4px; }
.chapter-card p { font-size: .88rem; color: var(--ink-soft); margin: 0 0 16px; }
.card-foot {
  margin-top: auto; display: flex; justify-content: space-between; align-items: center; gap: 10px;
  border-top: 1px solid var(--line-soft); padding-top: 12px; font-size: .75rem; color: var(--muted);
}
.card-progress { color: var(--accent); font-weight: 650; }
.card-progress.done { color: var(--gold); }

/* ---------- steps / subjects ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.step { border-top: 2px solid var(--ink); padding-top: 16px; }
.step-num { font-family: var(--serif); font-size: 1.6rem; color: var(--accent-2); }
.step h3 { margin-top: 6px; }
.step p { font-size: .92rem; color: var(--ink-soft); }
.method-note {
  margin-top: 36px; padding: 20px 24px; background: var(--card); border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.method-note p { margin: 0; }
.subjects { display: flex; flex-wrap: wrap; gap: 10px; }
.subject {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border: 1px dashed var(--line);
  border-radius: 999px; font-size: .88rem; color: var(--ink-soft);
}
.subject em { font-style: normal; font-size: .7rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }

/* ---------- page head ---------- */
.page-head { padding-block: clamp(48px, 7vw, 84px) 40px; border-bottom: 1px solid var(--line); }
.page-head h1 { margin-bottom: 18px; }
.page-meta, .chapter-meta { display: flex; flex-wrap: wrap; gap: 18px; font-size: .8rem; color: var(--muted); }
.page-meta span, .chapter-meta span { display: inline-flex; align-items: center; gap: 8px; }
.page-meta span::before, .chapter-meta span::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--accent-2); }

/* ---------- program list ---------- */
.program-list { border-top: 1px solid var(--line); margin-top: 24px; }
.program-row {
  display: grid; grid-template-columns: 54px 1fr 30px; gap: 16px; align-items: center;
  padding: 18px 4px; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--ink);
  transition: background .2s, padding-left .2s;
}
.program-row:hover { background: var(--card); padding-left: 12px; }
.program-num { font-family: var(--mono); font-size: .8rem; color: var(--accent-2); }
.program-body { display: flex; flex-direction: column; gap: 2px; }
.program-body strong { font-family: var(--serif); font-size: 1.12rem; font-weight: 600; }
.program-body span { font-size: .78rem; color: var(--muted); }
.program-arrow { color: var(--accent); text-align: right; }

/* ---------- tool cards ---------- */
.two-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.tool-card {
  display: block; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--card); text-decoration: none; color: var(--ink); transition: border-color .2s, transform .2s;
}
.tool-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.tool-kicker { font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-2); }
.tool-card h3 { margin: 8px 0 8px; }
.tool-card p { font-size: .9rem; color: var(--ink-soft); }
.tool-link { font-size: .85rem; font-weight: 650; color: var(--accent); }

/* ---------- numbered list ---------- */
.numbered { padding-left: 22px; }
.numbered li { margin-bottom: 12px; padding-left: 6px; color: var(--ink-soft); }
.numbered li strong { color: var(--ink); }

/* ---------- chapter page ---------- */
.chapter-head { padding-block: clamp(40px, 6vw, 68px) 36px; border-bottom: 1px solid var(--line); }
.chapter-head h1 { max-width: 24ch; font-size: clamp(2rem, 4.4vw, 3.5rem); }
.chnum { display: block; font-family: var(--mono); font-size: .8rem; letter-spacing: .16em; color: var(--accent-2); margin-bottom: 12px; }
.chapter-layout { display: grid; grid-template-columns: 232px minmax(0, 1fr); gap: clamp(32px, 5vw, 64px); padding-block: 44px 80px; align-items: start; }
.toc { position: sticky; top: 88px; border-left: 2px solid var(--line); padding-left: 18px; }
.toc-title { font-size: .7rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.toc a { display: block; font-size: .86rem; color: var(--ink-soft); text-decoration: none; padding: 4px 0; line-height: 1.35; }
.toc a:hover, .toc a.active { color: var(--accent); }
.toc a.active { font-weight: 650; }
.toc-progress { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); }
.toc-progress .bar { height: 5px; background: var(--line-soft); border-radius: 99px; overflow: hidden; }
.toc-progress .bar span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .3s; }
.toc-progress p { font-size: .72rem; color: var(--muted); margin: 8px 0 0; }
.prose { max-width: var(--measure); }
.prose section { margin-bottom: 52px; }
.prose section > h2 { border-top: 1px solid var(--line); padding-top: 22px; }
.prose section:first-child > h2 { border-top: 0; padding-top: 0; }
.prose h3 { margin-top: 26px; }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin-bottom: 8px; }
.prose strong { font-weight: 700; }
.prose em { font-style: italic; }
.prose code { font-family: var(--mono); font-size: .88em; background: var(--paper-3); padding: 2px 5px; border-radius: 3px; }

/* ---------- objectives ---------- */
.objectives { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 24px 18px; }
.objectives h2 { font-size: 1.55rem; }
.obj-list { list-style: none; padding: 0 !important; margin: 16px 0 0; }
.obj-list li { border-top: 1px solid var(--line-soft); padding: 10px 0; margin: 0; }
.obj { display: flex; gap: 12px; align-items: flex-start; cursor: pointer; font-size: .92rem; line-height: 1.5; }
.obj input { margin-top: 4px; accent-color: var(--accent); width: 17px; height: 17px; flex: 0 0 auto; }
.obj input:checked + span { color: var(--muted); text-decoration: line-through; text-decoration-thickness: 1px; }

/* ---------- boxes ---------- */
.box { margin: 22px 0; padding: 18px 20px; border-left: 4px solid var(--accent); background: var(--card); border-radius: 0 var(--radius) var(--radius) 0; }
.box p:last-child { margin-bottom: 0; }
.box-title { font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.box-def { border-left-color: var(--accent); background: var(--accent-soft); }
.box-key { border-left-color: var(--gold); background: var(--gold-soft); }
.box-key .box-title { color: var(--gold); }
.box-example { border-left-color: var(--accent-2); background: var(--accent-2-soft); }
.box-example .box-title { color: var(--accent-2); }
.box-warn { border-left-color: var(--accent-2); background: var(--accent-2-soft); }
.box-warn .box-title { color: var(--accent-2); }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; margin: 20px 0; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: .88rem; background: var(--card); }
caption { caption-side: top; text-align: left; font-size: .78rem; color: var(--muted); padding: 10px 12px; border-bottom: 1px solid var(--line-soft); }
th, td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
th { background: var(--paper-2); font-weight: 700; font-size: .8rem; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.tnote { font-size: .75rem; color: var(--muted); margin-top: -8px; }

/* ---------- documents ---------- */
.doc { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); padding: 22px; margin: 22px 0; }
.doc-head { border-bottom: 1px solid var(--line-soft); padding-bottom: 12px; margin-bottom: 16px; }
.doc-kicker { font-size: .66rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 6px; }
.doc-head h3 { margin-bottom: 4px; }
.doc-source { font-size: .75rem; color: var(--muted); margin: 0; }
.doc-body { font-size: .92rem; }
.doc-questions { border-top: 1px dashed var(--line); margin-top: 16px; padding-top: 14px; }
.doc-qtitle { font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin-bottom: 6px; }
.doc-questions ol { margin: 0; padding-left: 20px; }
.doc-questions li { margin-bottom: 6px; font-size: .9rem; }

/* ---------- exercises ---------- */
.exo { border-bottom: 1px solid var(--line); padding: 4px 0; }
.exo summary { display: flex; gap: 12px; align-items: baseline; padding: 14px 0; cursor: pointer; font-size: .95rem; list-style: none; }
.exo summary::-webkit-details-marker { display: none; }
.exo summary::after { content: "+"; margin-left: auto; color: var(--accent); font-weight: 700; }
.exo[open] summary::after { content: "–"; }
.exo-level { flex: 0 0 auto; font-size: .64rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-2); border: 1px solid var(--accent-2); border-radius: 999px; padding: 3px 8px; }
.exo-answer { padding: 4px 0 18px 0; font-size: .92rem; color: var(--ink-soft); }
.exo-answer p:last-child { margin-bottom: 0; }

/* ---------- quiz ---------- */
.quiz { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); padding: 20px 22px; margin: 18px 0; }
.quiz-q { padding: 14px 0; border-bottom: 1px solid var(--line-soft); }
.quiz-q:first-of-type { padding-top: 0; }
.quiz-prompt { font-weight: 600; margin-bottom: 10px; }
.qnum { color: var(--accent-2); font-family: var(--mono); font-size: .82em; }
.quiz-choices { display: grid; gap: 7px; }
.quiz-choices label { display: flex; gap: 10px; align-items: flex-start; padding: 9px 12px; border: 1px solid var(--line-soft); border-radius: 4px; cursor: pointer; font-size: .9rem; transition: border-color .15s, background .15s; }
.quiz-choices label:hover { border-color: var(--accent); background: var(--accent-soft); }
.quiz-choices input { margin-top: 4px; accent-color: var(--accent); }
.choice-letter { font-family: var(--mono); font-size: .74rem; color: var(--muted); padding-top: 2px; }
.quiz-choices label.correct { border-color: var(--accent); background: var(--accent-soft); }
.quiz-choices label.wrong { border-color: var(--accent-2); background: var(--accent-2-soft); }
.quiz-explain { margin: 10px 0 0; padding: 12px 14px; border-left: 3px solid var(--accent); background: var(--accent-soft); font-size: .88rem; }
.quiz-explain.bad { border-left-color: var(--accent-2); background: var(--accent-2-soft); }
.quiz-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.quiz-score { margin: 12px 0 0; font-size: .9rem; font-weight: 650; color: var(--accent); }

/* ---------- memo ---------- */
.memo { background: var(--card); border: 2px solid var(--ink); border-radius: var(--radius); padding: 26px; }
.memo-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; border-bottom: 1px solid var(--line); padding-bottom: 14px; margin-bottom: 20px; }
.memo-head h2 { margin-bottom: 0; }
.memo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px 32px; }
.memo-block h3 { font-size: .78rem; font-family: var(--sans); text-transform: uppercase; letter-spacing: .12em; color: var(--accent-2); margin-bottom: 8px; }
.memo-block dl { margin: 0; font-size: .88rem; }
.memo-block dt { font-weight: 700; margin-top: 8px; }
.memo-block dd { margin: 0 0 0 0; color: var(--ink-soft); }
.memo-block ol, .memo-block ul { margin: 0; padding-left: 18px; font-size: .88rem; color: var(--ink-soft); }
.memo-block li { margin-bottom: 5px; }

/* ---------- chapter nav ---------- */
.chapter-nav { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); padding-top: 24px; margin-top: 8px; }
.chap-nav-link { display: flex; flex-direction: column; gap: 3px; text-decoration: none; max-width: 46%; }
.chap-nav-link span { font-size: .7rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.chap-nav-link strong { font-family: var(--serif); font-size: 1rem; color: var(--ink); font-weight: 600; }
.chap-nav-link.next { text-align: right; margin-left: auto; }
.chap-nav-link:hover strong { color: var(--accent); }

/* ---------- methods ---------- */
.method-layout { display: grid; grid-template-columns: 214px minmax(0, 1fr); gap: clamp(30px, 5vw, 58px); padding-block: 44px 80px; align-items: start; }
.method { margin-bottom: 50px; }
.method h2 { border-top: 1px solid var(--line); padding-top: 20px; }
.method-exo { margin-top: 18px; padding: 18px 20px; border: 1px dashed var(--line); border-radius: var(--radius); background: var(--paper-2); }
.method-exo-title { font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 8px; }

  /* ---------- glossary ---------- */
.glossary-search { position: sticky; top: 74px; z-index: 6; background: var(--paper); padding: 14px 0 8px; }
.glossary-search input { width: 100%; padding: 12px 16px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); color: var(--ink); font-size: .95rem; }
.glossary-search input:focus { border-color: var(--accent); }
.glossary-search input::placeholder { color: var(--muted); }
#glossary-count { font-size: .75rem; color: var(--muted); margin: 6px 0 0 6px; min-height: 1em; }
.alpha-nav { display: flex; flex-wrap: wrap; gap: 6px 14px; padding: 18px 0 26px; border-bottom: 1px solid var(--line); margin-bottom: 10px; }
.alpha-nav a { font-family: var(--mono); font-size: .85rem; text-decoration: none; color: var(--accent); }
.glossary-letter { padding-top: 28px; }
.glossary-letter h2 { font-size: 1.8rem; border-bottom: 2px solid var(--ink); padding-bottom: 6px; margin-bottom: 14px; }
.glossary-letter dl { margin: 0; }
.glossary-entry { padding: 12px 0; border-bottom: 1px solid var(--line-soft); }
.glossary-entry dt { font-weight: 700; font-family: var(--serif); font-size: 1.05rem; }
.glossary-entry dd { margin: 4px 0 0; font-size: .92rem; color: var(--ink-soft); }
.glossary-link { font-size: .75rem; white-space: nowrap; }

/* ---------- search overlay ---------- */
.search-overlay { position: fixed; inset: 0; z-index: 100; display: grid; justify-items: center; align-items: start; padding: clamp(12px, 8vh, 90px) 16px 16px; }
body.search-open { overflow: hidden; }
.search-overlay[hidden] { display: none; }
.search-backdrop { position: fixed; inset: 0; background: rgba(12, 12, 10, .48); backdrop-filter: blur(4px); }
.search-panel {
  position: relative; width: min(720px, 100%); max-height: min(76vh, 720px);
  display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line);
  border-radius: 10px; box-shadow: 0 30px 80px -30px rgba(0, 0, 0, .6); overflow: hidden;
}
.search-bar { display: flex; align-items: center; gap: 12px; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.search-bar > svg { flex: 0 0 auto; color: var(--muted); }
.search-bar input { flex: 1; min-width: 0; border: 0; background: transparent; color: var(--ink); font-size: 1.05rem; outline: none; }
.search-bar input::placeholder { color: var(--muted); }
.search-close { border: 0; background: transparent; color: var(--muted); font-size: 1rem; cursor: pointer; padding: 4px 6px; border-radius: 4px; }
.search-close:hover { color: var(--ink); background: var(--paper-2); }
.search-hints { padding: 16px 18px; overflow: auto; }
.search-hint-label { font-size: .68rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-2); margin: 0 0 8px; }
.search-hints .search-hint-label:not(:first-child) { margin-top: 18px; }
.search-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.search-chip { display: inline-block; padding: 6px 11px; border: 1px solid var(--line); border-radius: 999px; font-size: .8rem; color: var(--ink-soft); text-decoration: none; }
.search-chip:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.search-results { overflow: auto; padding: 0; flex: 1; }
.search-result { display: block; padding: 12px 18px; border-top: 1px solid var(--line-soft); text-decoration: none; color: var(--ink); }
.search-result:first-child { border-top: 0; }
.search-result:hover, .search-result.is-active { background: var(--accent-soft); }
.search-result-top { display: flex; align-items: center; gap: 9px; }
.search-result-type { flex: 0 0 auto; font-size: .62rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-2); border: 1px solid var(--accent-2); border-radius: 999px; padding: 2px 7px; }
.search-result-title { font-family: var(--serif); font-size: 1.04rem; line-height: 1.25; }
.search-result-breadcrumb { font-size: .72rem; color: var(--muted); margin-top: 3px; }
.search-result-snippet { font-size: .84rem; color: var(--ink-soft); margin-top: 4px; line-height: 1.45; }
.search-result-snippet mark { background: var(--gold-soft); color: var(--ink); padding: 0 2px; border-radius: 2px; }
.search-result mark { background: var(--gold-soft); color: var(--ink); padding: 0 2px; border-radius: 2px; }
.search-footer { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 16px; border-top: 1px solid var(--line); font-size: .78rem; color: var(--muted); }
.search-footer a { font-weight: 650; text-decoration: none; }
.search-no-result { padding: 20px 18px; font-size: .9rem; color: var(--ink-soft); margin: 0; }
.search-no-result a { font-weight: 600; }

/* ---------- search page ---------- */
.search-page { max-width: 860px; margin-inline: 0; padding-block: 34px 80px; }
.search-page-form { display: flex; gap: 10px; align-items: center; margin-bottom: 18px; }
.search-page-form input { flex: 1; min-width: 0; padding: 14px 18px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); color: var(--ink); font-size: 1.02rem; }
.search-page-form input:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.search-page-form .btn { flex: 0 0 auto; }
.search-filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.search-filter { padding: 7px 12px; border: 1px solid var(--line); border-radius: 999px; background: transparent; color: var(--ink-soft); font-size: .8rem; cursor: pointer; }
.search-filter:hover { border-color: var(--accent); color: var(--accent); }
.search-filter.is-active { background: var(--accent); border-color: var(--accent); color: var(--paper); }
.search-page-count { font-size: .8rem; color: var(--muted); min-height: 1.2em; margin-bottom: 6px; }
.search-page-results { border-top: 1px solid var(--line); }
.search-page-results .search-result { padding: 16px 4px; border-top: 0; border-bottom: 1px solid var(--line-soft); }
.search-page-results .search-result:hover { padding-left: 10px; background: transparent; }
.search-page-results .search-result-title { font-size: 1.12rem; }
.search-page-results .search-result-snippet { font-size: .88rem; }
.search-empty { padding: 26px 0 0; }
.search-empty-title { font-family: var(--serif); font-size: 1.45rem; color: var(--ink); margin-bottom: 8px; }
.search-empty-label { font-size: .68rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-2); margin: 22px 0 8px; }

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--line); background: var(--paper-2); padding-block: 46px 30px; }
.foot-inner { max-width: 1160px; margin-inline: auto; padding-inline: clamp(20px, 4vw, 48px); display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 34px; }
.brand-foot { font-size: 1.8rem; margin: 0 0 8px; }
.foot-brand p { font-size: .88rem; color: var(--ink-soft); max-width: 40ch; }
.foot-note { font-size: .78rem !important; color: var(--muted) !important; }
.foot-title { font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.foot-col a { display: block; font-size: .85rem; color: var(--ink-soft); text-decoration: none; margin-bottom: 7px; }
.foot-col a:hover { color: var(--accent); }
.foot-bottom { max-width: 1160px; margin: 32px auto 0; padding: 18px clamp(20px, 4vw, 48px) 0; border-top: 1px solid var(--line); }
.foot-bottom p { font-size: .75rem; color: var(--muted); margin: 0; }

/* ---------- market simulator ---------- */
.sim { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); padding: 18px; margin: 22px 0; }
.sim svg { display: block; width: 100%; height: auto; }
.sim-controls { display: flex; align-items: center; gap: 14px; margin-top: 12px; flex-wrap: wrap; }
.sim-controls label { font-size: .85rem; font-weight: 650; }
.sim-controls input[type="range"] { flex: 1; min-width: 160px; accent-color: var(--accent); }
.sim-readout { display: flex; gap: 18px; flex-wrap: wrap; font-size: .82rem; color: var(--ink-soft); margin-top: 8px; }
.sim-readout strong { color: var(--ink); }
.sim-status { font-weight: 700; }
.sim-status.equilibre { color: var(--accent); }
.sim-status.penurie { color: var(--accent-2); }
.sim-status.excedent { color: var(--gold); }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-card { max-width: 520px; }
  .chapter-grid { grid-template-columns: repeat(2, 1fr); }
  .chapter-layout, .method-layout { grid-template-columns: 1fr; }
  .toc { position: static; border-left: 0; border-bottom: 1px solid var(--line); padding: 0 0 18px; display: grid; grid-template-columns: 1fr 1fr; column-gap: 18px; }
  .toc-title { grid-column: 1 / -1; }
  .toc-progress { grid-column: 1 / -1; }
  .steps { grid-template-columns: 1fr; gap: 20px; }
  .foot-inner { grid-template-columns: 1fr 1fr; }
  .foot-brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .head-inner { gap: 14px; }
  .main-nav { gap: 14px; }
  .main-nav a { font-size: .82rem; }
  .brand { font-size: 1.35rem; }
  .icon-btn, .theme-btn, .search-btn { width: 36px; height: 36px; }
  .chapter-grid { grid-template-columns: 1fr; }
  .two-cards { grid-template-columns: 1fr; }
  .memo-grid { grid-template-columns: 1fr; }
  .memo-head { flex-direction: column; }
  .chapter-nav { flex-direction: column; }
  .chap-nav-link { max-width: 100%; }
  .chap-nav-link.next { text-align: left; margin-left: 0; }
  .foot-inner { grid-template-columns: 1fr; }
  .toc { grid-template-columns: 1fr; }
  .chapter-head h1 { max-width: none; }
  .search-overlay { padding: 0; }
  .search-panel { width: 100%; height: 100dvh; max-height: none; border-radius: 0; border: 0; }
  .search-results { max-height: none; }
  .search-result { padding: 12px 16px; }
  .search-page { padding-block: 24px 60px; }
  .search-page-form { flex-direction: column; align-items: stretch; }
  .search-page-form .btn { width: 100%; }
  .hero-search { flex-direction: column; align-items: stretch; }
  .hero-search .btn { width: 100%; }
}

@media (max-width: 470px) {
  html { scroll-padding-top: 132px; }
  .head-inner { flex-wrap: wrap; gap: 10px 12px; }
  .main-nav { order: 3; flex: 1 0 100%; margin-left: 0; justify-content: space-between; gap: 8px; padding-top: 8px; border-top: 1px solid var(--line-soft); }
  .main-nav a { font-size: .78rem; }
  .head-actions { margin-left: auto; }
  .glossary-search { top: 116px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ---------- print ---------- */
@media print {
  :root { --paper: #fff; --card: #fff; --paper-2: #fff; --paper-3: #fff; --ink: #000; --ink-soft: #222; --muted: #555; --line: #bbb; --line-soft: #ddd; }
  body { font-size: 11pt; line-height: 1.45; }
  .site-head, .site-foot, .skip-link, .toc, .chapter-nav, .quiz-actions, .print-btn, .theme-btn, .hero-actions, .search-overlay, .search-btn, .search-page-form, .search-filters { display: none !important; }
  .chapter-layout, .method-layout { display: block; padding: 0; }
  .prose { max-width: none; }
  .box, .doc, .quiz, .memo { break-inside: avoid; }
  a { color: #000; text-decoration: underline; }
  .print-memo .chapter-head, .print-memo .toc, .print-memo .chapter-nav { display: none !important; }
  .print-memo .prose > section:not(#memo) { display: none !important; }
  .print-memo #memo { border: 0; padding: 0; }
}