:root {
  --bg: #14161F;
  --bg-panel: #1B1E2A;
  --bg-raised: #232739;
  --border: #2C3044;
  --text: #ECE7DA;
  --text-dim: #9BA0B8;
  --accent: #E8A33D;
  --accent-dim: #7A5A2B;
  --accent2: #C2185B;
  --good: #4FA37A;
  --bad: #C2185B;
  --radius: 10px;
  --font-en: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-ta: 'Noto Sans Tamil', var(--font-body);
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
}

body {
  background-image:
    radial-gradient(circle at 1px 1px, rgba(232,163,61,0.06) 1px, transparent 0);
  background-size: 22px 22px;
}

#app {
  display: flex;
  min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.brand-ta {
  font-family: var(--font-ta);
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
}
.brand-en {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.nav-btn {
  text-align: left;
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-family: var(--font-en);
  font-size: 14px;
  padding: 9px 10px;
  border-radius: var(--radius);
  cursor: pointer;
}
.nav-btn:hover { background: var(--bg-raised); color: var(--text); }
.nav-btn.active { background: var(--accent-dim); color: var(--accent); }

.sidebar-label {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 4px;
}

.chapter-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
  overflow-y: auto;
  flex: 1;
}
.chapter-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: none;
  color: var(--text);
  text-align: left;
  padding: 8px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 13.5px;
}
.chapter-item span:first-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chapter-item:hover { background: var(--bg-raised); }
.chapter-item.active { background: var(--bg-raised); box-shadow: inset 2px 0 0 var(--accent); }
.chapter-count {
  font-family: var(--font-en);
  font-size: 11px;
  color: var(--text-dim);
  background: var(--bg);
  border-radius: 20px;
  padding: 1px 7px;
  flex-shrink: 0;
}

/* ---------- Main ---------- */
.main {
  flex: 1;
  padding: 32px 40px;
  overflow-y: auto;
  max-width: 900px;
}

.view-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.view-header h2 {
  font-family: var(--font-en);
  font-size: 24px;
  margin: 0;
  margin-right: auto;
}

h2 { font-family: var(--font-en); }

.muted { color: var(--text-dim); }
.muted.small { font-size: 13px; }

.empty-state {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  color: var(--text-dim);
}
.empty-state.small { padding: 20px; margin-top: 8px; }

/* buttons */
.primary-btn {
  background: var(--accent);
  color: #1B1400;
  border: none;
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 13.5px;
  padding: 10px 18px;
  border-radius: var(--radius);
  cursor: pointer;
}
.primary-btn:hover { filter: brightness(1.08); }
.primary-btn.large { font-size: 15px; padding: 13px 26px; }

.ghost-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--font-en);
  font-size: 13px;
  padding: 9px 14px;
  border-radius: var(--radius);
  cursor: pointer;
}
.ghost-btn:hover { color: var(--text); border-color: var(--text-dim); }

/* chapter notes */
.chapter-notes {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-dim);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 22px;
}
.chapter-notes .setup-label { margin-bottom: 0; }
.chapter-notes-body {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--text);
  white-space: pre-wrap;
}

/* [[slots]]: parts of an example answer to replace with your own details */
.slot {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

/* word table */
.word-table {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.word-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr;
  gap: 8px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  align-items: center;
  font-size: 14px;
}
.word-row:last-child { border-bottom: none; }
.word-row-head {
  background: var(--bg-panel);
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding-top: 10px;
  padding-bottom: 10px;
}
.cell-pron { font-size: 15px; font-weight: 600; }
.cell-notes { color: var(--text-dim); font-size: 13px; }

/* ---------- Quiz setup ---------- */
.quiz-setup { max-width: 640px; }
.setup-section { margin-bottom: 24px; }
.setup-label {
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 10px;
}
.chip-group { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 8px 14px;
  border-radius: 20px;
  font-family: var(--font-en);
  font-size: 13px;
  cursor: pointer;
}
.chip:hover { border-color: var(--accent); }
.chip.active { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }

/* ---------- Quiz card ---------- */
.quiz-card-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}
.quiz-progress {
  font-family: var(--font-en);
  color: var(--text-dim);
  font-size: 13px;
}
.flashcard {
  position: relative;
  width: 100%;
  min-height: 220px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
}
.kolam-corner {
  position: absolute;
  width: 34px;
  height: 34px;
  color: var(--accent);
  opacity: 0.35;
}
.kolam-corner.tl { top: 12px; left: 12px; }
.kolam-corner.br { bottom: 12px; right: 12px; transform: rotate(180deg); }

.flashcard-chapter {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.flashcard-prompt {
  font-family: var(--font-en);
  font-size: 28px;
  line-height: 1.3;
  font-weight: 600;
}
.flashcard-answer {
  min-height: 20px;
  font-family: var(--font-en);
  font-size: 20px;
  color: var(--accent);
}
.flashcard-notes {
  margin-top: 8px;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--text-dim);
  font-weight: 400;
}

.quiz-controls { display: flex; gap: 12px; }
.answer-btn {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 14px;
  padding: 12px 24px;
  border-radius: var(--radius);
  cursor: pointer;
  border: 1px solid transparent;
}
.answer-btn.yes { background: var(--good); color: #06231A; }
.answer-btn.no { background: transparent; border-color: var(--bad); color: var(--bad); }
.answer-btn:hover { filter: brightness(1.1); }

.quiz-summary {
  text-align: center;
  max-width: 420px;
  margin: 40px auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
}
.summary-score {
  font-family: var(--font-en);
  font-size: 56px;
  font-weight: 700;
  color: var(--accent);
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  #app { flex-direction: column; }
  .sidebar {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    padding: 14px 16px;
  }
  .chapter-list { flex-direction: row; overflow-x: auto; flex: none; width: 100%; }
  .nav { flex-direction: row; }
  .main { padding: 20px; }
  .word-row { grid-template-columns: 1fr; }
}

button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}