/* ==========================================================================
   features.css — styles for the enrichment phases: settings, PWA toast,
   readers, dialogues, phrasebook, exams, search, writing, speaking,
   authentic materials and the activity heatmap. Warm travel palette.
   ========================================================================== */

/* ---- display preferences ------------------------------------------------- */

html[data-font-size="s"] { --font-size-base: 14px; }
html[data-font-size="m"] { --font-size-base: 16px; }
html[data-font-size="l"] { --font-size-base: 18px; }

html[data-contrast="high"] {
  --color-text: #141210;
  --color-text-muted: #3d3a36;
  --color-border: #b9a99c;
  --color-primary: #a33f12;
  --color-surface-alt: #fff4ea;
}

html[data-motion="reduced"] *,
html[data-motion="reduced"] *::before,
html[data-motion="reduced"] *::after {
  animation-duration: 0.01ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.01ms !important;
  scroll-behavior: auto !important;
}

/* ---- toast --------------------------------------------------------------- */

.app-toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--tabbar-height) + 16px);
  transform: translateX(-50%);
  max-width: 88%;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(45, 42, 38, 0.94);
  color: #fff;
  font-size: 0.9rem;
  z-index: 120;
  opacity: 1;
  transition: opacity 0.25s ease;
}
.app-toast-out { opacity: 0; }

/* ---- chips, switches, link list ----------------------------------------- */

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 4px;
}

.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: 999px;
  padding: 8px 14px;
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  min-height: 38px;
  text-decoration: none;
}
.chip.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--color-border);
}
.settings-row:first-of-type { border-top: 0; }

.switch {
  position: relative;
  width: 46px;
  height: 26px;
  border-radius: 999px;
  border: 0;
  background: #d8ccc2;
  cursor: pointer;
  padding: 0;
  flex: none;
}
.switch.on { background: var(--color-primary); }
.switch-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  transition: left 0.18s ease;
}
.switch.on .switch-knob { left: 23px; }

.link-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.link-list a {
  display: block;
  padding: 12px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
}
.link-list a:active { background: var(--color-primary-soft); }

.hidden-input { display: none; }

/* ---- reader / long text -------------------------------------------------- */

.reader-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 4px 0 12px;
}
.reader-badge {
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

.reader-para {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}
.reader-para:last-child { border-bottom: 0; }
.reader-es {
  font-size: 1.05rem;
  line-height: 1.75;
  margin: 0 0 6px;
}
.reader-zh {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin: 0;
}
.reader-zh.hidden { display: none; }
.reader-zh-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin: 0 0 6px;
  letter-spacing: 0.02em;
}

.reader-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.glossary-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.glossary-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--color-border);
}
.glossary-es { font-weight: 600; }
.glossary-zh { color: var(--color-text-muted); font-size: 0.9rem; }

/* ---- dialogues ----------------------------------------------------------- */

.dialogue {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.dialogue-line {
  display: flex;
  flex-direction: column;
  max-width: 88%;
}
.dialogue-line.b { align-self: flex-end; align-items: flex-end; }
.dialogue-speaker {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}
.dialogue-bubble {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 10px 12px;
}
.dialogue-line.a .dialogue-bubble { border-bottom-left-radius: 4px; }
.dialogue-line.b .dialogue-bubble {
  border-bottom-right-radius: 4px;
  background: var(--color-primary-soft);
}
.dialogue-es { margin: 0 0 4px; font-size: 1rem; }
.dialogue-zh { margin: 0; font-size: 0.85rem; color: var(--color-text-muted); }
.dialogue-buttons {
  display: flex;
  gap: 6px;
  margin-top: 6px;
  flex-wrap: wrap;
}

/* ---- phrasebook ---------------------------------------------------------- */

.phrase-cat { margin-bottom: 14px; }
.phrase-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}
.phrase-item:last-child { border-bottom: 0; }
.phrase-text { min-width: 0; }
.phrase-es { margin: 0; font-size: 1rem; }
.phrase-zh { margin: 2px 0 0; font-size: 0.86rem; color: var(--color-text-muted); }
.phrase-play {
  flex: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
}

/* ---- exams --------------------------------------------------------------- */

.exam-timer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  font-weight: 600;
  margin-bottom: 12px;
}
.exam-timer.warning { background: #fde2e1; color: var(--color-danger); }

.exam-q {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}
.exam-q:last-child { border-bottom: 0; }
.exam-q-label { font-size: 0.85rem; color: var(--color-text-muted); margin: 0 0 4px; }
.exam-q-es { font-size: 1.05rem; margin: 0 0 8px; }
.exam-options { display: flex; flex-direction: column; gap: 6px; }
.exam-option {
  text-align: left;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font: inherit;
  cursor: pointer;
}
.exam-option.picked { border-color: var(--color-primary); background: var(--color-primary-soft); }
.exam-option.correct { border-color: #2f855a; background: #e6fffa; }
.exam-option.wrong { border-color: var(--color-danger); background: #fff5f5; }

.exam-result-score { font-size: 2.4rem; font-weight: 700; color: var(--color-primary); }

/* ---- activity heatmap ---------------------------------------------------- */

.heatmap {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(7, 1fr);
  gap: 3px;
  overflow-x: auto;
  padding-bottom: 6px;
}
.heat-cell {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: #efe3d8;
}
.heat-cell.l1 { background: #f6c9a8; }
.heat-cell.l2 { background: #eda678; }
.heat-cell.l3 { background: #dd7a44; }
.heat-cell.l4 { background: var(--color-primary-dark); }
.heat-legend {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 6px;
}

/* ---- search -------------------------------------------------------------- */

.search-results { display: flex; flex-direction: column; gap: 8px; }
.search-item {
  display: block;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
}
.search-kind {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary-dark);
}
.search-es { margin: 2px 0; font-size: 1rem; }
.search-zh { margin: 0; font-size: 0.85rem; color: var(--color-text-muted); }

/* ---- writing / speaking -------------------------------------------------- */

.prompt-card { margin-bottom: 12px; }
.writing-editor {
  width: 100%;
  min-height: 160px;
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  font: inherit;
  line-height: 1.6;
  resize: vertical;
  background: var(--color-surface);
  color: var(--color-text);
}
.word-count { font-size: 0.8rem; color: var(--color-text-muted); text-align: right; }
.model-box {
  margin-top: 10px;
  padding: 12px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
}
.model-box.hidden { display: none; }
.checklist { margin: 8px 0 0; padding-left: 20px; font-size: 0.9rem; }
.checklist li { margin: 4px 0; }

.record-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 0;
  background: var(--color-primary);
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
  margin: 10px auto;
  display: block;
}
.record-btn.recording { background: var(--color-danger); animation: pulse 1s infinite; }
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}
.record-status { text-align: center; font-size: 0.9rem; color: var(--color-text-muted); }
.transcript {
  padding: 12px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  font-size: 0.95rem;
}
.score-pill {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  font-weight: 600;
  font-size: 0.85rem;
}

/* ---- authentic materials ------------------------------------------------- */

.authentic-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}
.authentic-item:last-child { border-bottom: 0; }
.authentic-kind {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary-dark);
}
.authentic-line { margin: 4px 0; }
.authentic-es { font-size: 1rem; margin: 0; }
.authentic-zh { font-size: 0.85rem; color: var(--color-text-muted); margin: 2px 0 0; }
.authentic-notes {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* ---- misc ---------------------------------------------------------------- */

.section-heading {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin: 18px 0 8px;
}
.empty-note {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 18px 0;
}
.unit-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.unit-tools a {
  font-size: 0.85rem;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  text-decoration: none;
}

/* ---- feature grid -------------------------------------------------------- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 12px 0;
}
.feature-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 6px;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.8rem;
  text-align: center;
}
.feature-icon { font-size: 1.3rem; line-height: 1; }
.feature-label { font-weight: 600; }
.daily-goal-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 6px 0;
  font-size: 0.9rem;
}
.daily-goal-row strong { font-size: 1.15rem; color: var(--color-primary-dark); }
.activity-summary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-top: 8px;
}
.activity-item {
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  font-size: 0.85rem;
}
.activity-item strong { color: var(--color-primary-dark); }
.exam-best-list { margin: 8px 0 0; padding: 0; list-style: none; }
.exam-best-list li {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}
.exam-best-list li:last-child { border-bottom: 0; }

/* ---- course unit tools --------------------------------------------------- */

.unit-block {
  padding: 4px 0 10px;
  border-bottom: 1px solid var(--color-border);
}
.unit-block:last-child { border-bottom: 0; padding-bottom: 0; }
.unit-block .unit-link { border-bottom: 0; padding-bottom: 4px; }
.unit-block .unit-tools { margin-top: 2px; }
.level-exam-link { margin-top: 12px; }
.drill-input {
  height: 46px;
  min-height: 0;
  margin: 8px 0;
}

.dialogue-zh.hidden { display: none; }