:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --border: #e2e5ec;
  --text: #1c2230;
  --muted: #6b7280;
  --accent: #4338ca;
  --accent-hover: #3730a3;
  --accent-soft: #eef0fd;
  --danger: #dc2626;
  --radius: 12px;

  --hl-0: #4338ca;
  --hl-1: #b45309;
  --hl-2: #0f766e;
  --hl-3: #be185d;
  --hl-4: #15803d;

  --uz-color: #007a8f;
  --uz-soft: #e2f4f6;
  --ru-color: #b91c1c;
  --ru-soft: #fbe9e7;

  --gold: #b8860b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141c;
    --surface: #1a1d29;
    --border: #2b2f3d;
    --text: #edeef2;
    --muted: #9297a6;
    --accent: #818cf8;
    --accent-hover: #a5b0fb;
    --accent-soft: #232744;

    --hl-0: #a5b0fb;
    --hl-1: #fbbf24;
    --hl-2: #2dd4bf;
    --hl-3: #f472b6;
    --hl-4: #4ade80;

    --uz-color: #5fd4e8;
    --uz-soft: #16323a;
    --ru-color: #ff8a80;
    --ru-soft: #3a1f1c;

    --gold: #e0b34d;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.site-header {
  padding: 2rem 1.5rem 1.5rem;
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  justify-content: center;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: #15121b;
  border: 1px solid #ffffff22;
  padding: 6px;
  overflow: hidden;
}

.brand-mark svg {
  width: 100%;
  height: 100%;
}

.wave-bar {
  transform-box: fill-box;
  transform-origin: center;
  animation: wave-bounce 1.1s ease-in-out infinite;
}

@keyframes wave-bounce {
  0%, 100% { transform: scaleY(0.45); opacity: 0.5; }
  50% { transform: scaleY(1); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .wave-bar {
    animation: none;
    transform: scaleY(0.75);
    opacity: 0.85;
  }
}

.brand-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.1;
  font-size: 1.4rem;
}

.brand-text strong {
  color: var(--gold);
}

.brand-text span {
  color: var(--accent);
  font-weight: 600;
}

.tagline {
  margin: 0.75rem 0 0;
  color: var(--text);
  font-weight: 500;
}

.tagline-sub {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.level-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.level-tab {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.level-tab:hover {
  border-color: var(--accent);
}

.level-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.part-block {
  margin-bottom: 1.75rem;
}

.part-block h2 {
  font-size: 1rem;
  margin: 0 0 0.25rem;
}

.part-block .part-desc {
  margin: 0 0 0.9rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.prompt-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
}

.topic-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  cursor: pointer;
  text-align: center;
  font-family: inherit;
  transition: border-color 0.15s, transform 0.1s;
}

.topic-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.topic-icon {
  font-size: 1.8rem;
}

.topic-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.topic-count {
  font-size: 0.75rem;
  color: var(--muted);
}

.topic-back {
  border: none;
  background: none;
  color: var(--muted);
  font-size: 0.85rem;
  cursor: pointer;
  padding: 0;
  margin-bottom: 1rem;
}

.topic-back:hover {
  color: var(--accent);
}

.topic-heading {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.1rem;
  margin: 0 0 1rem;
}

.prompt-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.prompt-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem;
  cursor: pointer;
}

.prompt-text {
  margin: 0;
  font-size: 0.95rem;
}

.sticker {
  font-size: 1.3rem;
  margin-right: 0.5rem;
  vertical-align: -3px;
}

.model-answer {
  background: var(--accent-soft);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.model-answer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.model-answer h3 {
  margin: 0;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.pronounce-row {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.speak-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.15s, color 0.15s;
}

.speak-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.speak-btn:active {
  transform: scale(0.96);
}

.vocab-chunk-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.model-answer h4 {
  margin: 0.3rem 0 0;
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.answer-text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.6;
}

mark.chunk {
  background: none;
  font-weight: 700;
  padding: 0;
}

.hl-0 { color: var(--hl-0); }
.hl-1 { color: var(--hl-1); }
.hl-2 { color: var(--hl-2); }
.hl-3 { color: var(--hl-3); }
.hl-4 { color: var(--hl-4); }

.vocab-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.vocab-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.82rem;
  border-top: 1px solid var(--border);
  padding-top: 0.5rem;
}

.vocab-chunk {
  font-weight: 700;
}

.vocab-pills {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.vocab-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-weight: 500;
}

.vocab-pill .flag {
  font-size: 0.9rem;
}

.vocab-pill-uz {
  background: var(--uz-soft);
  color: var(--uz-color);
}

.vocab-pill-ru {
  background: var(--ru-soft);
  color: var(--ru-color);
}

.vocab-meta {
  color: var(--muted);
  font-size: 0.78rem;
}

.record-label {
  margin: 0.2rem 0 0;
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.cue-bullets {
  margin: 0.4rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.cue-tail {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
  font-style: italic;
}

.badge {
  flex-shrink: 0;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  white-space: nowrap;
}

.chevron {
  color: var(--muted);
  font-size: 0.8rem;
  flex-shrink: 0;
  transition: transform 0.15s;
}

.prompt-card.open .chevron {
  transform: rotate(90deg);
}

.practice-panel {
  display: none;
  border-top: 1px solid var(--border);
  padding: 1rem;
  flex-direction: column;
  gap: 0.9rem;
}

.prompt-card.open .practice-panel {
  display: flex;
}

.btn {
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid transparent;
  padding: 0.3rem 0.5rem;
  font-size: 0.78rem;
}

.btn-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.recording-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--danger);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
  animation: pulse 1.2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.timer {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  font-size: 0.85rem;
}

.error-text {
  color: var(--danger);
  font-size: 0.85rem;
  margin: 0;
}

audio {
  width: 100%;
  height: 34px;
}

.attempts {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.attempts h3 {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 600;
}

.attempt-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.6rem;
}

.attempt-row .attempt-meta {
  display: flex;
  flex-direction: column;
  min-width: 90px;
  font-size: 0.72rem;
  color: var(--muted);
}

.attempt-row audio {
  flex: 1;
}

.privacy-note {
  text-align: center;
  color: var(--muted);
  font-size: 0.78rem;
  max-width: 760px;
  margin: 0 auto 2rem;
  padding: 0 1.5rem;
}