/* ============================================================
   Interval Trainer — page-specific styles
   Dark theme, uses design tokens from /css/styles.css
   ============================================================ */

.itrainer-page {
  --bg: #0C1A14;
  --bg-card: #12251B;
  --bg-card-border: #1F4B34;
  --text: #E8F5EE;
  --text-dim: #7CA88E;
  --accent: #10B981;
  --accent-hover: #059669;
  --correct: #10B981;
  --wrong: #EF4444;
  --btn-bg: #183026;
  --btn-border: #2A5E42;
}

/* ── Layout ── */
.itrainer-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
  background: var(--bg);
  min-height: 100vh;
}

body:has(.itrainer-page) { background: #0C1A14; }
body:has(.itrainer-page) .nav { background: rgba(12, 26, 20, 0.92); border-bottom-color: #1F4B34; }
body:has(.itrainer-page) .nav__menu a { color: #7CA88E; }
body:has(.itrainer-page) .nav__menu a:hover,
body:has(.itrainer-page) .nav__menu a.active { color: #10B981; }
body:has(.itrainer-page) .footer { background: #0A1610; color: #7CA88E; }
body:has(.itrainer-page) .footer h4 { color: #E8F5EE; }
body:has(.itrainer-page) .footer a { color: #7CA88E; }
body:has(.itrainer-page) .footer a:hover { color: #10B981; }
body:has(.itrainer-page) .footer__bottom { border-top-color: #1F4B34; color: #5A8A6E; }
body:has(.itrainer-page) .footer__brand p,
body:has(.itrainer-page) .footer .loc { color: #5A8A6E; }

.itrainer-page h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--text);
  margin-bottom: 8px;
  text-align: center;
}
.itrainer-page .page-subtitle {
  color: var(--text-dim);
  font-size: 1rem;
  margin-bottom: 32px;
  text-align: center;
}
.itrainer-page .page-subtitle strong { color: var(--text); font-weight: 500; }

/* ── Card ── */
.it-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

/* ── Controls ── */
.it-controls {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 20px;
}
.it-ctrl {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: var(--text-dim);
  font-weight: 500;
}
.it-select {
  appearance: none;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  padding: 6px 28px 6px 10px;
  font-size: 0.8125rem;
  font-family: var(--font-body);
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%237CA88E' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}
.it-select:focus { outline: none; border-color: var(--accent); }
.it-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 80px; height: 4px;
  background: var(--bg-card-border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.it-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  background: var(--accent); border-radius: 50%; cursor: pointer;
}
.it-slider::-moz-range-thumb {
  width: 16px; height: 16px;
  background: var(--accent); border-radius: 50%; border: none; cursor: pointer;
}

/* ── Score Bar ── */
.it-score-bar {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 24px;
  padding: 10px 16px;
  background: var(--bg);
  border-radius: var(--radius);
}
.it-score {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}
.it-pct {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent);
}
.it-btn--ghost {
  background: transparent;
  border: 1px solid var(--bg-card-border);
  color: var(--text-dim);
  font-size: 0.75rem;
  font-family: var(--font-body);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  margin-left: auto;
}
.it-btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ── Play Area ── */
.it-play-area {
  text-align: center;
  margin-bottom: 24px;
}
.it-btn--play {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
  border: none;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.25);
  transition: all 0.2s;
}
.it-btn--play:hover { background: var(--accent-hover); }
.it-btn--replay {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--bg-card-border);
  font-family: var(--font-body);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
  margin-left: 10px;
}
.it-btn--replay:hover { border-color: var(--accent); color: var(--accent); }

/* ── Feedback ── */
.it-feedback {
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.125rem;
  font-weight: 600;
  transition: color 0.2s;
}
.it-feedback.correct { color: var(--correct); }
.it-feedback.wrong { color: var(--wrong); }
.it-feedback.neutral { color: var(--text-dim); }

/* ── Answer Grid ── */
.it-answers {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 8px;
}
.it-answer-btn {
  padding: 12px 8px;
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
  color: var(--text);
  font-family: var(--font-body);
}
.it-answer-btn:hover {
  border-color: var(--accent);
  background: rgba(16, 185, 129, 0.1);
}
.it-answer-btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}
.it-answer-btn.correct {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--correct);
}
.it-answer-btn.wrong {
  background: rgba(239, 68, 68, 0.15);
  border-color: var(--wrong);
}
.it-answer-btn__name {
  display: block;
  font-size: 0.9375rem;
  font-weight: 700;
}
.it-answer-btn__short {
  display: block;
  font-size: 0.6875rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  margin-top: 2px;
}

/* ── Reference Card ── */
.it-reference-card { margin-top: 20px; }
.it-section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-weight: 600;
}
.it-ref-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
}
.it-ref-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: background 0.15s;
}
.it-ref-item:hover { background: rgba(16, 185, 129, 0.08); }
.it-ref-name {
  font-weight: 700;
  color: var(--text);
  min-width: 32px;
}
.it-ref-song {
  color: var(--text-dim);
  font-style: italic;
}
.it-ref-semitones {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--accent);
  margin-left: auto;
}

/* ── Info Sections ── */
.it-info {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  margin-top: 20px;
  color: var(--text);
}
.it-info h2 {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  margin-bottom: 16px;
  color: var(--text);
}
.it-info ol {
  padding-left: 20px;
  color: var(--text-dim);
  line-height: 1.8;
}
.it-info ol strong { color: var(--text); font-weight: 500; }
.it-info p {
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 10px;
}
.it-info p:last-child { margin-bottom: 0; }
.it-info p strong { color: var(--text); font-weight: 500; }
.it-info--links p { font-size: 0.9375rem; }
.it-info a { color: var(--accent); text-decoration: none; }
.it-info a:hover { text-decoration: underline; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .itrainer-page { padding: 32px 16px 64px; }
  .it-card { padding: 16px; }
  .it-controls { gap: 10px; }
  .it-answers { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); }
}
@media (max-width: 480px) {
  .it-controls { flex-direction: column; align-items: stretch; }
  .it-ctrl { justify-content: space-between; }
  .it-select { flex: 1; }
  .it-btn--play { width: 100%; justify-content: center; }
  .it-answers { grid-template-columns: repeat(2, 1fr); }
  .it-ref-grid { grid-template-columns: 1fr; }
}