/* ============================================================
   Inburgering A2 — design system
   Canonical tokens/components per "Design Guidelines — Inburgering
   A2 Study Site" (design audit, Aug 2026). Warm-serious tone: Delft
   blue + amber, generous whitespace, no gradients except progress
   bar and flashcard front. Print is first-class.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&display=swap');

:root {
  --primary: #1b3a5c;
  --primary-light: #2a5a8c;
  --primary-muted: #3d6e9e;
  --primary-faint: #e8f0f8;

  --accent: #d17a2e;
  --accent-light: #e8943f;
  --accent-faint: #fef3e7;

  --success: #2d8a5e;
  --success-faint: #e6f5ee;
  --warning: #c59a2e;
  --warning-faint: #fefbe8;
  --danger: #c44040;
  --danger-faint: #fef2f2;

  --bg: #faf8f5;
  --bg-warm: #f5f1eb;
  --card-bg: #ffffff;
  --text: #2c2c2c;
  --text-secondary: #5a6370;
  --text-muted: #8a9099;
  --border: #e5e1db;
  --border-light: #eeebe6;

  --grammar-color: #2a5a8c;
  --grammar-bg: #e8f0f8;
  --exams-color: #c47024;
  --exams-bg: #fef3e7;
  --practice-color: #2d8a5e;
  --practice-bg: #e6f5ee;

  --shadow-sm: 0 1px 3px rgba(27, 58, 92, 0.06);
  --shadow: 0 2px 8px rgba(27, 58, 92, 0.07), 0 1px 3px rgba(27, 58, 92, 0.04);
  --shadow-md: 0 4px 16px rgba(27, 58, 92, 0.1), 0 2px 6px rgba(27, 58, 92, 0.05);
  --shadow-lg: 0 8px 32px rgba(27, 58, 92, 0.14), 0 4px 12px rgba(27, 58, 92, 0.06);

  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'JetBrains Mono', Monaco, 'Courier New', monospace;

  color-scheme: light;
}

/* Dark palette — same tokens, same roles, only the OS/toggle changes which
   values they resolve to. Explicit toggle (data-theme) always wins. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary: #82abd8; --primary-light: #a3c4e8; --primary-muted: #6693c2; --primary-faint: #1b2c3e;
    --accent: #e79a4e; --accent-light: #f0b47a; --accent-faint: #3a2917;
    --success: #5cb890; --success-faint: #16261f;
    --warning: #d6b158; --warning-faint: #2c2416;
    --danger: #dd7a7a; --danger-faint: #2e1c1c;
    --bg: #101a26; --bg-warm: #16222f; --card-bg: #17222f;
    --text: #e7ecf2; --text-secondary: #aab6c4; --text-muted: #7c8998;
    --border: #263b50; --border-light: #1d2f42;
    --grammar-color: #82abd8; --grammar-bg: #1b2c3e;
    --exams-color: #e79a4e; --exams-bg: #2c2117;
    --practice-color: #5cb890; --practice-bg: #16261f;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --primary: #82abd8; --primary-light: #a3c4e8; --primary-muted: #6693c2; --primary-faint: #1b2c3e;
  --accent: #e79a4e; --accent-light: #f0b47a; --accent-faint: #3a2917;
  --success: #5cb890; --success-faint: #16261f;
  --warning: #d6b158; --warning-faint: #2c2416;
  --danger: #dd7a7a; --danger-faint: #2e1c1c;
  --bg: #101a26; --bg-warm: #16222f; --card-bg: #17222f;
  --text: #e7ecf2; --text-secondary: #aab6c4; --text-muted: #7c8998;
  --border: #263b50; --border-light: #1d2f42;
  --grammar-color: #82abd8; --grammar-bg: #1b2c3e;
  --exams-color: #e79a4e; --exams-bg: #2c2117;
  --practice-color: #5cb890; --practice-bg: #16261f;
  color-scheme: dark;
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
code, pre { font-family: var(--font-mono); }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--primary); color: #fff;
  padding: 0.75rem 1.25rem; z-index: 1000;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

h1, h2, h3, h4 { font-family: var(--font-display); color: var(--text); text-wrap: balance; }
h1 { font-size: 2.5rem; font-weight: 800; letter-spacing: -0.03em; line-height: 1.15; }
h2 { font-size: 1.35rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 1rem; }
h3 { font-size: 1.1rem; font-weight: 600; letter-spacing: -0.01em; }
h4 { font-size: 1rem; font-weight: 600; }
p { color: var(--text-secondary); }
a { color: var(--primary-light); }
strong { color: var(--text); }
.caption { font-size: 0.88rem; color: var(--text-secondary); }

@media (max-width: 768px) {
  h1 { font-size: 1.85rem; }
  h2 { font-size: 1.15rem; }
}

.container { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem 4rem; }
.prose { max-width: 65ch; }
.prose p, .prose li { max-width: 65ch; }
.tabular-nums { font-variant-numeric: tabular-nums; }
::selection { background: var(--accent-faint); color: var(--text); }
:focus-visible { outline: 2.5px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important; scroll-behavior: auto !important;
  }
}

/* === Navigation === */
.nav { background: var(--primary); color: white; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 12px rgba(27, 58, 92, 0.15); }
.nav-container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; display: flex; align-items: center; justify-content: space-between; height: 60px; }
.nav-brand { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; color: white; text-decoration: none; white-space: nowrap; }
.nav-right { display: flex; align-items: center; gap: 0.25rem; }
.theme-toggle, .nav-toggle {
  background: none; border: none; color: white; font-size: 1.15rem; cursor: pointer;
  padding: 0.4rem 0.5rem; border-radius: var(--radius); line-height: 1;
}
.theme-toggle:hover, .nav-toggle:hover { background: rgba(255, 255, 255, 0.1); }
.nav-toggle { display: none; font-size: 1.4rem; }
.nav-links { display: flex; gap: 0.25rem; align-items: center; }
.nav-dropdown { position: relative; }
.nav-dropdown-toggle {
  display: block; list-style: none; padding: 0.85rem 0.9rem;
  color: rgba(255, 255, 255, 0.88); font-family: var(--font-body); font-size: 0.92rem; font-weight: 500;
  cursor: pointer; user-select: none;
}
.nav-dropdown-toggle::-webkit-details-marker { display: none; }
.nav-dropdown-toggle::after { content: ' ▾'; opacity: 0.6; font-size: 0.75em; }
.nav-dropdown-toggle:hover { color: white; }
.nav-dropdown-menu {
  position: absolute; top: 100%; left: 0; background: var(--card-bg);
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: 0.4rem; min-width: 200px; display: flex; flex-direction: column; border: 1px solid var(--border);
}
.nav-dropdown-menu a { padding: 0.55rem 0.75rem; border-radius: 6px; color: var(--text); text-decoration: none; font-size: 0.92rem; display: block; }
.nav-dropdown-menu a:hover { background: var(--bg-warm); }
.nav-dropdown-menu a[aria-current="page"] { color: var(--accent); font-weight: 600; }

@media (max-width: 780px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    background: var(--primary); flex-direction: column; align-items: stretch; padding: 0.5rem; box-shadow: var(--shadow-lg);
  }
  .nav-links.open { display: flex; }
  .nav-dropdown-menu { position: static; box-shadow: none; border: none; background: rgba(255, 255, 255, 0.05); margin: 0.25rem 0 0.5rem; }
  .nav-dropdown-menu a { color: rgba(255, 255, 255, 0.85); }
  .nav-dropdown-menu a:hover { background: rgba(255, 255, 255, 0.08); }
}

/* === Buttons — ✓ consistent, don't add new variants without checking here === */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-body); font-weight: 600; font-size: 0.92rem;
  padding: 0.7rem 1.5rem; border-radius: var(--radius); border: 1.5px solid transparent;
  cursor: pointer; text-decoration: none; transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { box-shadow: var(--shadow); }
.btn-success { background: var(--success); color: #fff; }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text-secondary); }
.btn-outline:hover { border-color: var(--primary-muted); color: var(--text); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 0.45rem 0.9rem; font-size: 0.85rem; }
.btn-today { background: var(--accent); color: white; font-size: 1rem; padding: 0.85rem 1.5rem; }
.btn-today-done { background: var(--success); }

/* === Badges — single system, replaces tier-badge/tag-high/tag-med/tag-new === */
.badge { display: inline-block; padding: 0.1rem 0.6rem; border-radius: 10px; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.02em; }
.badge-high { background: var(--danger-faint); color: var(--danger); }
.badge-medium { background: var(--warning-faint); color: var(--warning); }
.badge-low { background: var(--success-faint); color: var(--success); }
.badge-new { background: var(--primary-faint); color: var(--primary); }

/* === Alerts — ✓ consistent === */
.alert { padding: 1rem 1.25rem; border-radius: var(--radius); font-size: 0.92rem; margin: 0.9rem 0; border-left: 4px solid; }
.alert-info { background: var(--primary-faint); border-color: var(--primary-light); color: var(--primary); }
.alert-warning { background: var(--warning-faint); border-color: var(--warning); color: #7a5d10; }
.alert-success { background: var(--success-faint); border-color: var(--success); color: #1a6b42; }
.alert-danger { background: var(--danger-faint); border-color: var(--danger); color: #a13030; }

/* === Template box — dark navy, monospace, TEMPLATE tab === */
.template-box {
  background: #1a2332; color: #d4dce8; padding: 1.5rem; border-radius: var(--radius);
  font-family: var(--font-mono); font-size: 0.9rem; line-height: 1.9;
  position: relative; border: 1px solid #2a3a4e; margin: 1.5rem 0 0.75rem;
}
.template-box::before {
  content: 'TEMPLATE'; position: absolute; top: -0.7rem; left: 1rem;
  background: var(--accent); color: #fff; padding: 0.15rem 0.7rem; border-radius: 4px;
  font-size: 0.68rem; font-weight: 700; font-family: var(--font-display); letter-spacing: 0.08em;
}
.steal { color: #f0a868; font-weight: 600; text-decoration: underline; text-decoration-color: rgba(240, 168, 104, 0.4); }
.reuse { color: #7fb3e8; font-weight: 600; text-decoration: underline; text-decoration-color: rgba(127, 179, 232, 0.4); }
.template-box .gloss { opacity: 0.55; font-style: italic; font-family: var(--font-body); }

/* === Task block — centralized (was duplicated in writing.html + writing-practice.html) === */
.task-block { background: var(--card-bg); border: 1px solid var(--border-light); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); padding: 1.5rem; margin-bottom: 1.25rem; }
.task-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; }
.task-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.9rem; height: 1.9rem; border-radius: 50%; background: var(--primary-light); color: #fff;
  font-family: var(--font-display); font-weight: 700; font-size: 0.85rem; flex-shrink: 0;
}
.task-header h3 { margin: 0; }
.task-header .task-gloss { font-size: 0.85rem; color: var(--text-muted); font-weight: 400; }
.task-prompt { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.25rem; margin: 0.75rem 0; font-size: 0.9rem; color: var(--text-secondary); }
.task-prompt ul { margin: 0.5rem 0 0 1.25rem; }
.task-prompt li { margin-bottom: 0.25rem; }
.sample-answer { border-left: 4px solid var(--success); padding-left: 1rem; margin: 0.75rem 0; }

/* === Cards & grids === */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.card-link {
  display: block; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 1.25rem 1.4rem; text-decoration: none; box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.card-link:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--primary-muted); }
.card-link h3 { margin-bottom: 0.3rem; color: var(--text); }
.card-link p { font-size: 0.88rem; margin: 0; }
.exam-card { border-left: 4px solid var(--exams-color); }
.grammar-card { border-left: 4px solid var(--grammar-color); }
.practice-card { border-left: 4px solid var(--practice-color); }

.card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); padding: 1.5rem; }

/* === Hero / stat / progress === */
.hero-row { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.hero-text p { margin-top: 0.35rem; }

.progress-container { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-xl); padding: 1.25rem 1.5rem; margin-bottom: 2rem; box-shadow: var(--shadow); }
.progress-top { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 0.6rem; }
.progress-percent { font-family: var(--font-display); font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.progress-bar { height: 8px; background: var(--bg-warm); border-radius: 999px; overflow: hidden; margin-bottom: 1.1rem; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 999px; transition: width 0.4s ease; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem; }
.stat-card { text-align: center; }
.stat-number { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: var(--primary); font-variant-numeric: tabular-nums; }
.stat-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }

/* === Strategy / overview grid === */
.strategy-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0.85rem; margin: 1.25rem 0 2rem; }
.strategy-item { background: var(--bg-warm); border-radius: var(--radius); padding: 1rem 1.1rem; }
.strategy-exam { font-family: var(--font-display); font-weight: 700; margin-bottom: 0.25rem; }
.strategy-tip { font-size: 0.85rem; color: var(--text-secondary); }

/* === Section blocks === */
section + section { margin-top: 2.5rem; }
.section-eyebrow { font-family: var(--font-display); font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 0.4rem; }

/* === Tabs === */
.tabs { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 1.25rem; border-bottom: 1px solid var(--border); padding-bottom: 0.6rem; }
.tab-btn { background: var(--card-bg); border: 1px solid var(--border); color: var(--text-secondary); padding: 0.5rem 1rem; border-radius: 999px; font-family: var(--font-body); font-size: 0.88rem; font-weight: 500; cursor: pointer; }
.tab-btn[aria-selected="true"] { background: var(--primary); color: white; border-color: var(--primary); }
.tab-panel[hidden] { display: none; }

/* === Accordion === */
.accordion-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 0.65rem; overflow: hidden; background: var(--card-bg); }
.accordion-trigger { width: 100%; text-align: left; background: none; border: none; padding: 1rem 1.2rem; font-family: var(--font-display); font-weight: 600; font-size: 1rem; color: var(--text); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.accordion-trigger::after { content: '+'; font-size: 1.3rem; color: var(--text-muted); transition: transform 0.15s ease; }
.accordion-trigger[aria-expanded="true"]::after { transform: rotate(45deg); }
.accordion-panel { padding: 0 1.2rem 1.1rem; }
.accordion-panel[hidden] { display: none; }

/* === Compare grid (word-order position cards etc.) === */
.compare-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 0.75rem; }
.compare-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 0.9rem 1rem; }
.compare-card h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); margin-bottom: 0.4rem; }

/* === Self-check practice (attempt → reveal, no grading) === */
.self-check { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-xl); padding: 1.4rem 1.5rem; margin: 1.25rem 0; box-shadow: var(--shadow-sm); }
.self-check-prompt { background: var(--bg-warm); border-radius: var(--radius); padding: 0.9rem 1.1rem; font-size: 0.92rem; margin-bottom: 0.9rem; }
.self-check textarea {
  width: 100%; min-height: 7rem; font-family: var(--font-body); font-size: 0.95rem;
  padding: 0.8rem 1rem; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg); color: var(--text); resize: vertical;
}
.self-check-reveal { margin-top: 1rem; border-top: 1px dashed var(--border); padding-top: 1rem; }
.self-check-reveal summary { cursor: pointer; font-weight: 600; color: var(--primary-light); list-style: none; }
.self-check-reveal summary::-webkit-details-marker { display: none; }
.self-check-reveal summary::before { content: '▸ '; }
.self-check-reveal[open] summary::before { content: '▾ '; }
.self-check-list { margin-top: 0.75rem; list-style: none; }
.self-check-list li { display: flex; gap: 0.5rem; padding: 0.3rem 0; font-size: 0.9rem; color: var(--text-secondary); }
.self-check-list input[type="checkbox"] { margin-top: 0.2rem; accent-color: var(--success); }

/* === Flashcards === */
.flashcard-stage { max-width: 480px; margin: 0 auto; }
.flashcard { position: relative; height: 260px; perspective: 1200px; margin-bottom: 1.25rem; cursor: pointer; }
.flashcard-inner { position: relative; width: 100%; height: 100%; transition: transform 0.5s; transform-style: preserve-3d; }
.flashcard.flipped .flashcard-inner { transform: rotateY(180deg); }
.flashcard-face {
  position: absolute; inset: 0; backface-visibility: hidden; border-radius: var(--radius-xl);
  display: flex; align-items: center; justify-content: center; text-align: center; padding: 2rem;
  box-shadow: var(--shadow-md); font-family: var(--font-display); font-size: 1.4rem; font-weight: 600;
}
.flashcard-front { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; }
.flashcard-back { background: var(--card-bg); color: var(--text); border: 1px solid var(--border); transform: rotateY(180deg); }

/* === Quiz === */
.quiz-question { background: var(--card-bg); border: 1px solid var(--border-light); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 1.75rem; }
.quiz-option { display: block; width: 100%; text-align: left; background: var(--bg); border: 1.5px solid var(--border); border-radius: var(--radius); padding: 0.85rem 1.1rem; margin-bottom: 0.6rem; cursor: pointer; font-family: var(--font-body); font-size: 0.95rem; color: var(--text); }
.quiz-option:hover { border-color: var(--primary-muted); }
.quiz-option.correct { background: var(--success-faint); border-color: var(--success); }
.quiz-option.incorrect { background: var(--danger-faint); border-color: var(--danger); }

/* === Word-order builder exercise (click-to-build practice) === */
.btn-group { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1rem; }
.wordbuild-slots {
  display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; min-height: 3.25rem;
  padding: 1rem; margin: 1rem 0;
  background: var(--bg-warm); border: 2px dashed var(--border); border-radius: var(--radius);
}
.wordbuild-bank { display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 1rem; background: var(--bg); border-radius: var(--radius); }
.word-chip {
  padding: 0.5rem 1rem; border-radius: var(--radius); border: 1.5px solid var(--border);
  background: var(--card-bg); color: var(--text); font-family: var(--font-body); font-weight: 600;
  font-size: 0.95rem; cursor: pointer; transition: border-color 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}
.word-chip:hover { border-color: var(--primary-muted); background: var(--primary-faint); }
.word-chip.used { opacity: 0.35; cursor: not-allowed; }
.word-chip.placed { background: var(--primary-faint); border-color: var(--primary-light); color: var(--primary); }
.exercise-result { display: none; padding: 0.9rem 1.1rem; border-radius: var(--radius); margin-top: 1rem; font-weight: 600; }
.exercise-result.show { display: block; }
.exercise-result.correct { background: var(--success-faint); color: var(--success); }
.exercise-result.incorrect { background: var(--danger-faint); color: var(--danger); }

/* === Tables === */
.table-wrap { overflow-x: auto; margin: 1rem 0; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; background: var(--card-bg); box-shadow: var(--shadow-sm); border-radius: var(--radius); overflow: hidden; }
th, td { text-align: left; padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--border-light); }
th { font-family: var(--font-display); font-weight: 600; color: var(--text-muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; }

/* === Checklist === */
.checklist { list-style: none; }
.checklist li { display: flex; gap: 0.6rem; align-items: flex-start; padding: 0.55rem 0; border-bottom: 1px solid var(--border-light); }
.checklist li.completed label { color: var(--text-muted); text-decoration: line-through; }
.checklist input[type="checkbox"] { margin-top: 0.2rem; accent-color: var(--success); }

/* === Text-to-speech controls === */
.tts-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.9rem; height: 1.9rem; border-radius: 50%; border: none;
  background: var(--primary-faint); color: var(--primary); cursor: pointer; font-size: 0.9rem;
  vertical-align: middle; transition: background 0.15s ease;
}
.tts-btn:hover { background: var(--primary-light); color: #fff; }
.tts-btn.playing { background: var(--accent); color: #fff; animation: tts-pulse 1s ease-in-out infinite; }
@keyframes tts-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.6; } }
.tts-highlight { background: var(--accent-faint); outline: 2px solid var(--accent); }
#tts-status { font-size: 0.8rem; color: var(--text-muted); }
.speed-btn { background: var(--card-bg); border: 1px solid var(--border); border-radius: 999px; padding: 0.3rem 0.75rem; font-size: 0.82rem; cursor: pointer; color: var(--text-secondary); }
.speed-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* === Footer === */
.site-footer { border-top: 1px solid var(--border); padding: 1.5rem 0; }
.footer-row { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.75rem; padding: 0; max-width: 1100px; }
.footer-links { font-size: 0.85rem; color: var(--text-muted); display: flex; gap: 0.5rem; align-items: center; }
.footer-links a { color: var(--text-secondary); }
.footer-sep { opacity: 0.5; }

/* === Print — first-class, not an afterthought === */
@media print {
  .nav, .site-footer, .btn, .skip-link, .self-check textarea, .theme-toggle { display: none !important; }
  body { background: #fff; color: #000; }
  .container { max-width: none; padding: 0; }
  .card, .card-link, .task-block, .quiz-question, .template-box, table { box-shadow: none !important; }
  a { color: #000; text-decoration: underline; }
}