/* ==========================================================================
   Digital Lyceum — global.css
   Layout/scaffold preserved from v1. Tokens + new callouts merged from the
   Claude Design pass (2026-05-01) — see `_design_reference/HANDOFF.md`.
   Class names are intent-based; do not rename without updating components.
   ========================================================================== */

/* ---------- FONTS (Claude Design pass) ---------- */
@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;500;600;700&family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=EB+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&display=swap');

/* ---------- DESIGN TOKENS ---------- */
:root {
  /* Color — surface */
  --color-bg:           #faf6ec;  /* parchment */
  --color-surface:      #f5efde;  /* warm cream */
  --color-surface-alt:  #ede4cb;  /* deeper cream */
  --color-ink:          #2a2418;  /* dark warm ink */
  --color-ink-soft:     #5b4f38;  /* muted ink */
  --color-ink-faint:    #8a7d62;  /* faint ink */

  /* Color — accent */
  --color-gold:         #b8902a;  /* primary accent */
  --color-gold-deep:    #8a6a1c;  /* hover/border */
  --color-gold-glow:    rgba(184,144,42,0.18); /* subtle inscription glow */
  --color-ochre:        #c9924a;  /* secondary warm */
  --color-laurel:       #6b7a3a;  /* muted classical green */

  /* Color — semantic */
  --color-danger:       #9c2a20;
  --color-danger-soft:  #f5e2dd;
  --color-correct:      #5a6f2a;
  --color-correct-soft: #ecf0d8;

  /* Borders & dividers */
  --border-rule:        1px solid var(--color-ink-faint);
  --border-strong:      2px solid var(--color-ink-soft);
  --border-soft:        1px solid var(--color-surface-alt);
  --radius-sm:          3px;
  --radius-md:          6px;

  /* Typography — Cinzel for chiseled inscription headings, Garamond for body */
  --font-display:       'Cinzel', 'Cormorant Garamond', 'EB Garamond', Georgia, serif;
  --font-body:          'EB Garamond', 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-quote:         'Cormorant Garamond', 'EB Garamond', Georgia, serif;
  --font-mono:          ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --font-size-base:     1.55rem;        /* +2pt body bump */
  --line-height-body:   1.65;
  --tracking-inscription: 0.18em;
  --tracking-loose:     0.06em;

  /* Heading scale — dramatic classical proportions (Claude Design pass) */
  --fs-h1:              2.85rem;
  --fs-h2:              2.10rem;
  --fs-h3:              1.62rem;
  --fs-h4:              1.32rem;

  /* Engraved type effect — light hairline below, dark hairline above */
  --engrave-light:      0 1px 0 rgba(255, 240, 200, 0.25);
  --engrave-dark:       0 -1px 0 rgba(0, 0, 0, 0.35);

  /* Layout — body uses 70vw (15% gutter each side) up to a sane cap. */
  --content-max:        1400px;
  --content-width:      70vw;
  --space-page:         1.5rem;
}

@media (max-width: 1024px) {
  :root { --content-width: 84vw; }
}
@media (max-width: 720px) {
  :root { --font-size-base: 1.25rem; --space-page: 1rem;
          --fs-h1: 2.3rem; --fs-h2: 1.75rem; --fs-h3: 1.4rem;
          --content-width: 92vw; }
}
@media (max-width: 480px) {
  :root { --font-size-base: 1.15rem; --space-page: 0.75rem;
          --fs-h1: 1.9rem; --fs-h2: 1.5rem; --fs-h3: 1.25rem;
          --content-width: 96vw; }
}

/* Dark mode — black parchment + gold linework. Soft, elegant, not stark. */
[data-theme="dark"] {
  --color-bg:           #15110a;  /* black parchment */
  --color-surface:      #1f1a10;  /* warm near-black */
  --color-surface-alt:  #2a2316;  /* slightly raised */
  --color-ink:          #e8dcb8;  /* warm cream text */
  --color-ink-soft:     #b8a672;  /* faded gold-cream */
  --color-ink-faint:    #6b5d3a;  /* dim line color */

  --color-gold:         #d9b14a;  /* brighter on dark */
  --color-gold-deep:    #b8902a;
  --color-ochre:        #c9924a;
  --color-laurel:       #8a9658;

  --color-danger:       #c46050;
  --color-danger-soft:  #2a1812;
  --color-correct:      #9aac6a;
  --color-correct-soft: #1c2014;
}

/* ---------- BASE ---------- */
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-ink);
  width: min(var(--content-width), var(--content-max));
  margin: 0 auto;
  padding: var(--space-page);
  line-height: var(--line-height-body);
  font-size: var(--font-size-base);
}

/* Headings: Cinzel + dramatic scale + engraved depth (display only) */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-ink);
  font-weight: 500;
  text-shadow: var(--engrave-light), var(--engrave-dark);
}
h1 { font-size: var(--fs-h1); letter-spacing: var(--tracking-loose); line-height: 1.15; }
h2 { font-size: var(--fs-h2); letter-spacing: 0.04em; line-height: 1.2; }
h3 { font-size: var(--fs-h3); letter-spacing: 0.04em; line-height: 1.25; }
h4 { font-size: var(--fs-h4); letter-spacing: 0.03em; line-height: 1.3; }
.site-header .brand { letter-spacing: var(--tracking-inscription); text-transform: uppercase; }

@media (max-width: 480px) {
  .nav-controls { flex-wrap: wrap; }
  .last-section-actions { align-items: stretch; width: 100%; }
}

/* ---------- CODE & PROMPTS ---------- */
pre, pre.astro-code {
  background: var(--color-surface) !important;
  padding: 0.75rem 1rem; border-radius: var(--radius-sm);
  white-space: pre-wrap !important; word-break: break-word;
  overflow-wrap: anywhere; overflow-x: visible !important;
  font-family: var(--font-mono); font-size: 1.2rem;
  color: var(--color-ink) !important;
}
pre code, pre.astro-code code { background: none; padding: 0; white-space: pre-wrap !important; color: var(--color-ink) !important; }
pre.astro-code span { color: var(--color-ink) !important; }
code { background: var(--color-surface); padding: 0.1rem 0.3rem; border-radius: var(--radius-sm); font-size: 0.9em; font-family: var(--font-mono); }

/* ---------- HEADER & FOOTER ---------- */
.site-header {
  display: flex; justify-content: space-between; align-items: center;
  padding-bottom: 1rem; border-bottom: var(--border-rule);
  margin-bottom: 1.5rem; gap: 1rem; flex-wrap: wrap;
}
.site-header:has(+ .course-progress) { border-bottom: none; padding-bottom: 0.5rem; margin-bottom: 0; }
.site-header a { color: var(--color-ink); text-decoration: none; }
.site-header .brand { font-family: var(--font-display); font-weight: 700; letter-spacing: 0.02em; }
.site-header .back-link { font-size: 0.95rem; color: var(--color-ink-soft); }
.site-header .back-link:hover { color: var(--color-gold-deep); }

.site-footer {
  margin-top: 3rem; padding-top: 1rem; border-top: var(--border-rule);
  color: var(--color-ink-soft); font-size: 0.85rem;
}

/* ---------- LESSON META ---------- */
.lesson-meta p { color: var(--color-ink-soft); font-size: 0.9rem; margin: 0; }
.lesson-meta h1 { margin-top: 0.25rem; }

/* ---------- RESOURCES BLOCK ---------- */
.resources {
  font-size: 0.95rem; color: var(--color-ink-soft);
  background: var(--color-surface);
  border-left: 3px solid var(--color-gold);
  padding: 0.5rem 0.85rem; margin: 0.5rem 0 1rem;
  border-radius: var(--radius-sm);
}

/* ---------- QUICK CHECK ---------- */
.qc-question { border-top: var(--border-rule); padding-top: 0.75rem; margin-top: 1rem; }
.qc-choices { list-style: none; padding-left: 0; }
.qc-choice { padding: 0.25rem 0; }
.qc-correct { color: var(--color-correct); font-weight: 600; }
.qc-wrong { color: var(--color-danger); }
.qc-answer { color: var(--color-correct); }
.qc-explain {
  background: var(--color-surface); padding: 0.5rem 0.75rem;
  border-left: 3px solid var(--color-ink-faint); margin-top: 0.5rem;
}
.qc-score { font-weight: 600; }

/* ---------- PROGRESS — segmented (in-module) ---------- */
.progress-bar { margin: 1.5rem 0 1rem; }
.progress-segments { display: flex; gap: 4px; margin-bottom: 0.5rem; }
.segment {
  flex: 1; min-height: 28px; padding: 0.25rem 0.375rem;
  border: 1px solid var(--color-ink-faint); background: var(--color-surface);
  border-radius: var(--radius-sm); cursor: not-allowed; transition: background 0.15s;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 600; color: var(--color-ink-soft); line-height: 1;
}
.segment.visited { background: var(--color-ochre); border-color: var(--color-gold-deep); color: #fff; cursor: pointer; }
.segment.visited:hover { background: var(--color-gold); }
.segment.current { background: var(--color-gold-deep); border-color: var(--color-ink-soft); color: #fff; cursor: default; }
.progress-counter { display: flex; justify-content: space-between; font-size: 0.85rem; color: var(--color-ink-soft); }
.counter-num { font-weight: 600; }
.counter-title { font-style: italic; }

/* ---------- PROGRESS — slim course-level (header bar) ---------- */
.course-progress { margin: 0 0 1.5rem; }
.course-progress-track { height: 4px; background: var(--color-surface-alt); border-radius: 2px; overflow: hidden; }
.course-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-ochre) 100%);
  transition: width 0.3s ease;
}
.course-progress-label { font-size: 0.8rem; color: var(--color-ink-soft); margin-top: 0.35rem; text-align: right; letter-spacing: 0.02em; }

/* ---------- NAV CONTROLS ---------- */
.nav-controls {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  margin: 2rem 0 1rem; padding-top: 1rem; border-top: var(--border-rule);
}
button { padding: 0.5rem 1rem; border: 1px solid var(--color-ink-soft); background: var(--color-bg); color: var(--color-ink); cursor: pointer; border-radius: var(--radius-sm); margin-right: 0.5rem; font-family: var(--font-body); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.primary { background: var(--color-gold); color: #fff; border-color: var(--color-gold-deep); }
button.primary:hover:not(:disabled) { background: var(--color-gold-deep); }
.last-section-actions { display: flex; flex-direction: column; gap: 0.5rem; align-items: flex-end; }
.restart-link, .reset-link { background: none; border: none; color: var(--color-ink-soft); text-decoration: underline; padding: 0; cursor: pointer; font-size: 0.85rem; }
.reset-course { margin-top: 1.5rem; }

/* ---------- MODULE NAV & LISTS ---------- */
.module-nav { margin-top: 2rem; padding-top: 1rem; border-top: var(--border-rule); }
.module-nav-buttons { display: flex; justify-content: space-between; gap: 1rem; }
.module-list { margin-top: 1rem; }
.course-list { list-style: none; padding: 0; }
.course-list li { border: var(--border-rule); border-radius: var(--radius-md); margin-bottom: 1rem; background: var(--color-surface); }
.course-list a { display: block; padding: 1rem; color: inherit; text-decoration: none; }
.course-list .coming-soon { opacity: 0.55; pointer-events: none; }
.course-list .coming-soon .badge {
  display: inline-block; font-size: 0.65em; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em;
  padding: 0.15em 0.5em; margin-left: 0.5em;
  border: 1px solid currentColor; border-radius: 999px; vertical-align: middle;
}

.module-index ol { list-style: none; padding: 0; }
.module-index li a { display: flex; gap: 0.5rem; padding: 0.5rem; color: inherit; text-decoration: none; }
.module-index li a:hover { background: var(--color-surface); }

.practice-card {
  display: block; margin-top: 1.5rem; padding: 1rem 1.25rem;
  border: var(--border-rule); border-radius: var(--radius-md);
  color: inherit; text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
}
.practice-card:hover { border-color: var(--color-gold); background: var(--color-surface); }
.practice-card h3 { margin: 0 0 0.25rem; }
.practice-card p { margin: 0; color: var(--color-ink-soft); font-size: 0.95rem; }

/* ---------- LESSON BODY — TABLES ---------- */
.lesson-body table { border-collapse: collapse; margin: 1rem 0; width: 100%; font-size: 0.95em; }
.lesson-body table th, .lesson-body table td { border: 1px solid var(--color-ink-faint); padding: 0.5rem 0.75rem; text-align: left; vertical-align: top; }
.lesson-body table thead th { background: var(--color-surface); font-weight: 600; border-bottom: var(--border-strong); }
.lesson-body table tbody tr:nth-child(even) { background: var(--color-surface); }

/* ---------- CALLOUTS ---------- */
/* v1 had only .callout-danger. Design pass adds info, tip, quote variants. */

/* Shared callout shape (info / tip) — hairline gold rule + cream surface. */
.callout-info, .callout-tip {
  border-left: 3px solid var(--color-gold);
  background: var(--color-surface);
  color: var(--color-ink);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin: 1rem 0;
}
.callout-info { border-left-color: var(--color-gold); }
.callout-tip  { border-left-color: var(--color-laurel); }
.callout-info p:first-child, .callout-tip p:first-child { margin-top: 0; }
.callout-info p:last-child,  .callout-tip p:last-child  { margin-bottom: 0; }

/* Quote — the "inscription tablet": Cinzel attribution, hairline gold rules. */
.callout-quote {
  font-family: var(--font-quote);
  font-style: italic;
  font-size: 1.15em;
  color: var(--color-ink-soft);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  border-top: 1px solid var(--color-gold);
  border-bottom: 1px solid var(--color-gold);
  background: linear-gradient(180deg, transparent 0%, var(--color-gold-glow) 100%);
  text-align: center;
}
.callout-quote::first-letter {
  font-family: var(--font-display);
  font-style: normal;
  font-size: 2.2em;
  line-height: 0.9;
  float: left;
  margin: 0.1em 0.15em 0 0;
  color: var(--color-gold-deep);
}
.callout-quote cite, .callout-quote .attribution {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--font-display);
  font-style: normal;
  font-size: 0.75em;
  letter-spacing: var(--tracking-inscription);
  text-transform: uppercase;
  color: var(--color-ink-faint);
}

.callout-danger {
  border-left: 4px solid var(--color-danger);
  background: var(--color-danger-soft);
  color: var(--color-danger);
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  border-radius: var(--radius-sm);
  margin: 1rem 0;
  position: relative;
}
.callout-danger::before {
  content: "⚠"; position: absolute; left: 0.85rem; top: 0.7rem;
  font-size: 1.3rem; color: var(--color-danger); font-weight: 700;
}
.callout-danger strong { color: var(--color-danger); }
.callout-danger p:first-child { margin-top: 0; }
.callout-danger p:last-child { margin-bottom: 0; }

/* ---------- INPUTS ---------- */
textarea { width: 100%; font-family: var(--font-mono); padding: 0.5rem; background: var(--color-bg); color: var(--color-ink); border: 1px solid var(--color-ink-faint); border-radius: var(--radius-sm); }

/* ---------- INLINE INTERACTIONS ---------- */
/* Minimal structural styles. Restyled by design pass. */
.interaction { margin: 1rem 0; }
.interaction-prompt { background: var(--color-surface); border-left: 3px solid var(--color-ink-faint); padding: 0.5rem 0.75rem; margin-bottom: 0.75rem; }
.interaction-label { display: block; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-ink-soft); margin-bottom: 0.25rem; }
.interaction-prompt p { margin: 0; }
.interaction-instructions { font-style: italic; color: var(--color-ink-soft); margin: 0 0 0.75rem; }
.interaction-options { display: flex; flex-direction: column; gap: 0.5rem; margin: 0 0 0.75rem; }
.interaction-option { width: 100%; box-sizing: border-box; text-align: left; padding: 0.75rem 1rem; border: 1px solid var(--color-ink-faint); border-radius: var(--radius-sm); background: var(--color-bg); cursor: pointer; margin: 0; font: inherit; color: var(--color-ink); }
.interaction-option:hover:not(:disabled) { border-color: var(--color-gold); }
.interaction-option.is-picked { border-color: var(--color-ink-soft); background: var(--color-surface); }
.interaction-option.is-correct { border-color: var(--color-correct); background: var(--color-correct-soft); }
.interaction-option.is-wrong { border-color: var(--color-danger); background: var(--color-danger-soft); }
.interaction-option-label { font-weight: 600; margin-bottom: 0.25rem; }
.interaction-option-text { white-space: normal; }
.interaction-option-why { margin-top: 0.5rem; padding-top: 0.5rem; border-top: 1px solid rgba(0,0,0,0.1); font-size: 0.9rem; }
.interaction-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; }
.interaction-feedback { margin: 0; }
.interaction-flavor { margin: 0 0 0.5rem; font-style: italic; color: var(--color-ink-soft); }

@media (max-width: 600px) {
  .interaction-option { padding: 0.875rem 1rem; }
  .interaction-prompt { padding: 0.625rem 0.75rem; }
  .interaction-actions { width: 100%; }
  .interaction-actions button { min-height: 44px; }
}

/* =========================================================================
   DEPTH PASS — Phase 1 (2026-05-01)
   Bevel borders + inset highlights + engraved type. No drop shadows.
   See DESIGN.md "Depth Vocabulary" for the locked rules.
   ========================================================================= */

/* ---------- Raised slab (shared depth treatment) ---------- */
/* Apply to surfaces that should read as carved stone. Hairline bevel +
   inset highlights = light from upper-left, no cast shadow. */
.course-list li,
.practice-card,
.interaction-option,
.qc-question {
  border-top-color:    rgba(255, 245, 215, 0.55);  /* light edge */
  border-left-color:   rgba(255, 245, 215, 0.35);
  border-right-color:  rgba(0, 0, 0, 0.18);        /* shadow edge */
  border-bottom-color: rgba(0, 0, 0, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.18),       /* gold inset top */
    inset 0 -1px 0 rgba(0, 0, 0, 0.18);            /* dark inset bottom */
  background-image: linear-gradient(180deg,
    rgba(255, 240, 200, 0.04) 0%,
    rgba(0, 0, 0, 0.03) 100%);
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

/* Hover: gold rule-glow + border tighten. No translate, no drop shadow. */
.course-list li:hover,
.practice-card:hover,
.interaction-option:hover:not(:disabled):not(.is-correct):not(.is-wrong) {
  border-color: var(--color-gold);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.35),
    inset 0 -1px 0 rgba(0, 0, 0, 0.22),
    0 0 0 1px var(--color-gold-glow);
}

/* ---------- Course list — marble veining (≤3% opacity, very subtle) ---------- */
.course-list li {
  position: relative;
  background-image:
    linear-gradient(180deg, rgba(255, 240, 200, 0.04) 0%, rgba(0, 0, 0, 0.03) 100%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='320' height='320'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='2' seed='3'/><feColorMatrix values='0 0 0 0 0.45  0 0 0 0 0.4  0 0 0 0 0.3  0 0 0 0.5 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/></svg>");
  background-size: auto, 320px 320px;
}
.course-list li h3,
.course-list li strong {
  font-family: var(--font-display);
  letter-spacing: var(--tracking-loose);
}

/* ---------- Carved progress segments (the "pills") ---------- */
.segment {
  border-top-color:    rgba(255, 245, 215, 0.5);
  border-left-color:   rgba(255, 245, 215, 0.35);
  border-right-color:  rgba(0, 0, 0, 0.20);
  border-bottom-color: rgba(0, 0, 0, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.18),
    inset 0 -1px 0 rgba(0, 0, 0, 0.18);
  background-image: linear-gradient(180deg,
    rgba(255, 240, 200, 0.05) 0%,
    rgba(0, 0, 0, 0.04) 100%);
  font-family: var(--font-display);
  letter-spacing: 0.05em;
}
.segment.visited,
.segment.current {
  background-image: linear-gradient(180deg,
    rgba(255, 240, 200, 0.18) 0%,
    rgba(0, 0, 0, 0.12) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.35),
    inset 0 -1px 0 rgba(0, 0, 0, 0.30);
  text-shadow: var(--engrave-light), var(--engrave-dark);
}

/* ---------- Quick Check — match Claude Design screenshot ---------- */
/* Lettered prefix in Cinzel tracked caps, body in tracked uppercase.
   Inscribed cards rather than filled buttons. */
.interaction-option {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: var(--tracking-loose);
  text-transform: uppercase;
  line-height: 1.4;
}
.interaction-option-label {
  font-family: var(--font-display);
  letter-spacing: var(--tracking-inscription);
  color: var(--color-gold-deep);
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
}
.interaction-option-text {
  text-transform: uppercase;
  letter-spacing: var(--tracking-loose);
  font-size: 0.9rem;
  color: var(--color-ink-soft);
}

/* Engraved label tags (e.g., "Examined · 1 of 4 passages") */
.interaction-label,
.qc-score {
  font-family: var(--font-display);
  letter-spacing: var(--tracking-inscription);
  text-transform: uppercase;
  color: var(--color-gold-deep);
  font-size: 0.75rem;
}

/* ---------- Section divider — full-width hairline gold rule ---------- */
.section-divider {
  border: 0;
  height: 0;
  border-top: 1px solid var(--color-gold);
  margin: 2.5rem 0;
  opacity: 0.7;
}

/* ---------- Module accordion (course landing) ---------- */
.module-accordion { list-style: none; padding: 0; margin: 1.5rem 0 0; }
.module-accordion-item {
  border: var(--border-rule);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  background: var(--color-surface);
  border-top-color:    rgba(255, 245, 215, 0.45);
  border-left-color:   rgba(255, 245, 215, 0.30);
  border-right-color:  rgba(0, 0, 0, 0.18);
  border-bottom-color: rgba(0, 0, 0, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.16);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.module-accordion-item:hover {
  border-color: var(--color-gold);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.30),
    inset 0 -1px 0 rgba(0, 0, 0, 0.20),
    0 0 0 1px var(--color-gold-glow);
}
.module-accordion-header {
  display: flex; align-items: center; gap: 0.85rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  user-select: none;
}
.module-accordion-toggle {
  background: none; border: none; padding: 0; margin: 0;
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-gold-deep);
  cursor: pointer;
  transition: transform 0.25s ease, color 0.2s;
  flex-shrink: 0;
}
.module-accordion-toggle svg { width: 22px; height: 22px; }
.module-accordion-item.is-open .module-accordion-toggle {
  transform: rotate(90deg);
  color: var(--color-gold);
}
.module-accordion-status {
  font-family: var(--font-display);
  color: var(--color-gold-deep);
  width: 1.5rem; flex-shrink: 0; text-align: center;
}
.module-accordion-title {
  flex: 1;
  font-family: var(--font-display);
  letter-spacing: var(--tracking-loose);
  color: var(--color-ink);
  text-decoration: none;
}
.module-accordion-title:hover { color: var(--color-gold-deep); }
.module-accordion-meta { color: var(--color-ink-faint); font-size: 0.85rem; }
.module-accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1rem;
}
.module-accordion-item.is-open .module-accordion-body {
  max-height: 500px;
  padding: 0 1rem 1rem 1rem;
}
.module-accordion-summary {
  border-top: 1px solid var(--color-ink-faint);
  padding-top: 0.75rem;
  margin: 0;
  color: var(--color-ink-soft);
  font-style: italic;
}

/* =========================================================================
   THEME TOGGLE — sun / crescent moon, top-right of viewport.
   Click to toggle [data-theme]; persists to localStorage via inline script
   in each layout. Spaced evenly from top + right edges. No depth/shadow.
   ========================================================================= */
/* Theme toggle previews the destination it'll switch to:
   - Light mode: dark button + moon icon (click → go dark)
   - Dark mode: light button + sun icon (click → go light) */
.theme-toggle {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-ink-soft);    /* muted brown in light, muted gold-cream in dark */
  color: var(--color-bg);                /* parchment in light, black-parchment in dark */
  border: 1px solid var(--color-gold);
  border-radius: 50%;
  cursor: pointer;
  padding: 0;
  z-index: 100;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.theme-toggle:hover {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 1px var(--color-gold-glow);
}
.theme-toggle svg { width: 20px; height: 20px; }

/* No explicit dark-mode override — `var(--color-ink-soft)` and `var(--color-bg)`
   flip automatically between modes, giving inverse-tone button on each side. */

/* Light mode: show moon (click to go dark). Dark mode: show sun (click to go light). */
.theme-toggle .theme-toggle-sun { display: none; }
.theme-toggle .theme-toggle-moon { display: inline; }
[data-theme="dark"] .theme-toggle .theme-toggle-sun { display: inline; }
[data-theme="dark"] .theme-toggle .theme-toggle-moon { display: none; }

@media print {
  .theme-toggle { display: none !important; }
}

/* External links (rehype-external-links adds rel="noreferrer noopener" + target="_blank";
   give them a subtle visual cue too). */
.lesson-body a[target="_blank"]::after {
  content: " ↗";
  font-size: 0.85em;
  color: var(--color-gold-deep);
  letter-spacing: 0;
}

/* =========================================================================
   PHASE 1.5 POLISH (2026-05-01)
   ========================================================================= */

/* Home tagline — replaces the redundant <h1>Digital Lyceum</h1> */
.home-tagline {
  font-family: var(--font-quote);
  font-style: italic;
  font-size: var(--fs-h3);
  color: var(--color-ink-soft);
  margin: 1.5rem 0 2rem;
  letter-spacing: 0.02em;
}

/* Prev/Next nav buttons — engraved/raised slab treatment */
.nav-controls button,
button.primary {
  font-family: var(--font-display);
  letter-spacing: var(--tracking-loose);
  text-transform: uppercase;
  font-size: 0.95rem;
  border-top-color:    rgba(255, 245, 215, 0.5);
  border-left-color:   rgba(255, 245, 215, 0.35);
  border-right-color:  rgba(0, 0, 0, 0.20);
  border-bottom-color: rgba(0, 0, 0, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.20),
    inset 0 -1px 0 rgba(0, 0, 0, 0.20);
  background-image: linear-gradient(180deg,
    rgba(255, 240, 200, 0.06) 0%,
    rgba(0, 0, 0, 0.04) 100%);
  text-shadow: var(--engrave-light), var(--engrave-dark);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.nav-controls button:hover:not(:disabled),
button.primary:hover:not(:disabled) {
  border-color: var(--color-gold);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.35),
    inset 0 -1px 0 rgba(0, 0, 0, 0.22),
    0 0 0 1px var(--color-gold-glow);
}

/* Quick Check — raised, but no surface gradient (cleaner than the depth pass) */
.qc-question {
  background-image: none;
  padding: 1rem 1.25rem;
  border: 1px solid var(--color-ink-faint);
  border-radius: var(--radius-md);
  border-top-color:    rgba(255, 245, 215, 0.5);
  border-left-color:   rgba(255, 245, 215, 0.35);
  border-right-color:  rgba(0, 0, 0, 0.20);
  border-bottom-color: rgba(0, 0, 0, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.18),
    inset 0 -1px 0 rgba(0, 0, 0, 0.18);
  margin-top: 1.5rem;
  background: var(--color-surface);
}
.qc-question:first-of-type { margin-top: 1.5rem; }

/* =========================================================================
   PRACTICE ACCORDION (Phase 2)
   ========================================================================= */

.practice-accordion {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}
.practice-accordion-item {
  border: var(--border-rule);
  border-radius: var(--radius-md);
  margin-bottom: 0.85rem;
  background: var(--color-surface);
  border-top-color:    rgba(255, 245, 215, 0.45);
  border-left-color:   rgba(255, 245, 215, 0.30);
  border-right-color:  rgba(0, 0, 0, 0.18);
  border-bottom-color: rgba(0, 0, 0, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.16);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.practice-accordion-item:hover {
  border-color: var(--color-gold);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.30),
    inset 0 -1px 0 rgba(0, 0, 0, 0.20),
    0 0 0 1px var(--color-gold-glow);
}
.practice-accordion-header {
  display: flex; align-items: center; gap: 0.85rem;
  padding: 0.95rem 1.1rem;
  cursor: pointer;
  user-select: none;
}
.practice-accordion-toggle {
  background: none; border: none; padding: 0; margin: 0;
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-gold-deep);
  cursor: pointer;
  transition: transform 0.25s ease, color 0.2s;
  flex-shrink: 0;
}
.practice-accordion-toggle svg { width: 22px; height: 22px; }
.practice-accordion-item.is-open .practice-accordion-toggle {
  transform: rotate(90deg);
  color: var(--color-gold);
}
.practice-accordion-number {
  font-family: var(--font-display);
  letter-spacing: var(--tracking-inscription);
  color: var(--color-gold-deep);
  font-size: 0.95rem;
  width: 1.5rem; flex-shrink: 0; text-align: center;
}
.practice-accordion-title {
  flex: 1;
  font-family: var(--font-display);
  letter-spacing: var(--tracking-loose);
  color: var(--color-ink);
  font-size: 1.05rem;
}
.practice-accordion-meta {
  font-family: var(--font-display);
  letter-spacing: var(--tracking-inscription);
  text-transform: uppercase;
  color: var(--color-ink-faint);
  font-size: 0.75rem;
}
/* Accordion body — uses CSS grid 0fr→1fr trick to animate to auto-height,
   no max-height clamp, no content cutoff regardless of project length. */
.practice-accordion-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease, padding 0.3s ease;
  padding: 0 1.1rem;
}
.practice-accordion-body-inner {
  overflow: hidden;
  min-height: 0;
}
.practice-accordion-item.is-open .practice-accordion-body {
  grid-template-rows: 1fr;
  padding: 0 1.1rem 1.25rem 1.1rem;
}

.practice-objective {
  border-top: 1px solid var(--color-ink-faint);
  padding-top: 0.85rem;
  margin: 0 0 1rem;
  font-style: italic;
  color: var(--color-ink-soft);
}
.practice-deliverable-line {
  margin: 1.5rem 0 0.5rem;
  padding: 0.6rem 0.85rem;
  background: var(--color-surface-alt);
  border-left: 3px solid var(--color-gold);
  border-radius: var(--radius-sm);
  font-style: italic;
}

/* Cheat-sheet body — tighter rhythm than lesson body */
.practice-body {
  font-size: 0.97em;
}

/* Eyebrow-label section headings (Option 1, 2026-05-01).
   Small Cinzel, tracked uppercase, gold, hairline gold rule beneath.
   Generous whitespace above. The label IS the divider. */
.practice-body h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;            /* +4pt over original eyebrow size */
  font-weight: 600;
  letter-spacing: var(--tracking-inscription);
  text-transform: uppercase;
  color: var(--color-gold-deep);
  text-shadow: none;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-gold);
  line-height: 1.2;
}
.practice-body h2:first-child {
  margin-top: 0.5rem;
}
.practice-body h3 {
  font-size: var(--fs-h4);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  text-shadow: none;
  letter-spacing: 0.03em;
}
.practice-body p { margin: 0.6rem 0; }
.practice-body ul, .practice-body ol { padding-left: 1.4rem; margin: 0.6rem 0; }
.practice-body li { margin-bottom: 0.4rem; }
.practice-body li > p { margin: 0.2rem 0; }
.practice-body pre {
  font-size: 0.92em;
  line-height: 1.5;
  margin: 0.85rem 0;
}

/* Download button */
.practice-download-row {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-ink-faint);
}
.practice-download {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
  padding: 0.7rem 1rem;
  text-decoration: none;
  font-family: var(--font-display);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gold);
  background: var(--color-surface);
  color: var(--color-ink);
  border-top-color:    rgba(255, 245, 215, 0.5);
  border-left-color:   rgba(255, 245, 215, 0.35);
  border-right-color:  rgba(0, 0, 0, 0.20);
  border-bottom-color: rgba(0, 0, 0, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.20),
    inset 0 -1px 0 rgba(0, 0, 0, 0.20);
  background-image: linear-gradient(180deg,
    rgba(255, 240, 200, 0.06) 0%,
    rgba(0, 0, 0, 0.04) 100%);
  text-shadow: var(--engrave-light), var(--engrave-dark);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.practice-download-label {
  font-size: 0.95rem;
  letter-spacing: var(--tracking-loose);
  text-transform: uppercase;
}
.practice-download-status {
  font-family: var(--font-body);
  font-size: 0.78rem;
  letter-spacing: 0;
  text-transform: none;
  text-shadow: none;
  color: var(--color-ink-faint);
  font-style: italic;
}
.practice-download.is-locked {
  cursor: not-allowed;
  opacity: 0.55;
  pointer-events: none;
}
.practice-download:not(.is-locked):hover {
  border-color: var(--color-gold);
  box-shadow:
    inset 0 1px 0 rgba(255, 240, 200, 0.35),
    inset 0 -1px 0 rgba(0, 0, 0, 0.22),
    0 0 0 1px var(--color-gold-glow);
}

.back-link-row { margin-top: 2rem; }

/* Module accordion — sections list (navigable) */
.module-accordion-sections {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--color-ink-faint);
  padding-top: 0.5rem;
}
.module-accordion-sections li {
  padding: 0.25rem 0 0.25rem 1.5rem;
  position: relative;
}
.module-accordion-sections li::before {
  content: "·";
  position: absolute;
  left: 0.5rem;
  color: var(--color-gold-deep);
  font-weight: 700;
}
.module-accordion-sections a {
  color: var(--color-ink-soft);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 0.95rem;
}
.module-accordion-sections a:hover {
  color: var(--color-gold-deep);
  text-decoration: underline;
  text-decoration-color: var(--color-gold);
}