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

.metronome-page {
  --bg: #0C1A14;
  --bg-card: #12251B;
  --bg-card-border: #1F4B34;
  --text: #E8F5EE;
  --text-dim: #7CA88E;
  --accent: #10B981;
  --accent-hover: #059669;
  --red: #EF4444;
}

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

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

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

/* ── Card ── */
.metro-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ── BPM Display ── */
.metro-bpm {
  text-align: center;
  margin-bottom: 8px;
}
.metro-bpm__value {
  font-family: var(--font-display);
  font-size: clamp(4rem, 10vw, 6rem);
  font-weight: 400;
  color: var(--text);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.metro-bpm__unit {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-dim);
  margin-left: 4px;
}
.metro-bpm__marking {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent);
  margin-top: 4px;
  letter-spacing: 0.03em;
}

/* ── BPM Slider ── */
.metro-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-card-border);
  outline: none;
  margin: 16px 0;
  cursor: pointer;
}
.metro-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(16, 185, 129, 0.3);
}
.metro-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(16, 185, 129, 0.3);
}

/* ── BPM Adjust Row ── */
.metro-bpm-adjust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
}
.metro-adj-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--bg-card-border);
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}
.metro-adj-btn:hover { border-color: var(--accent); color: var(--text); }
.metro-bpm-input {
  width: 72px;
  padding: 6px 8px;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  text-align: center;
  outline: none;
}
.metro-bpm-input:focus { border-color: var(--accent); }

/* ── Pendulum ── */
.pendulum-container {
  width: 100%;
  height: 150px;
  position: relative;
  display: flex;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 20px;
}
.pendulum-arm {
  width: 2px;
  height: 130px;
  background: var(--text-dim);
  position: absolute;
  top: 0;
  transform-origin: top center;
  transition: none;
}
.pendulum-weight {
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: 50%;
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
}
.pendulum-arm.swinging {
  animation: pendulum-swing var(--swing-duration, 1s) ease-in-out infinite alternate;
}
@keyframes pendulum-swing {
  0%   { transform: rotate(-30deg); }
  100% { transform: rotate(30deg); }
}

/* ── Beat Indicators ── */
.metro-beats {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 24px;
}
.beat-dot {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid var(--bg-card-border);
  background: transparent;
  transition: background 0.08s, border-color 0.08s, box-shadow 0.08s, transform 0.08s;
}
.beat-dot.accent { border-color: rgba(16, 185, 129, 0.4); }
.beat-dot.active {
  background: var(--text-dim);
  border-color: var(--text-dim);
  box-shadow: 0 0 12px rgba(124, 168, 142, 0.4);
  transform: scale(1.2);
}
.beat-dot.accent.active {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.5);
}

/* ── Controls Row ── */
.metro-controls {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
  width: 100%;
}
.metro-ctrl {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: var(--text-dim);
  font-weight: 500;
}
.metro-ctrl__label { white-space: nowrap; }
.metro-ctrl__select {
  padding: 6px 10px;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  outline: none;
}
.metro-ctrl__select:focus { border-color: var(--accent); }
.metro-slider--sm {
  width: 90px;
  height: 4px;
  margin: 0;
}

/* ── Action Buttons ── */
.metro-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 8px;
}
.metro-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  font-family: var(--font-body);
}
.metro-btn--play {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.25);
}
.metro-btn--play:hover { background: var(--accent-hover); }
.metro-btn--play.playing {
  background: var(--red);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.25);
}
.metro-btn--play.playing:hover { background: #dc2626; }
.metro-btn--tap {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--bg-card-border);
  padding: 14px 24px;
}
.metro-btn--tap:hover { border-color: var(--accent); color: var(--text); }
.metro-btn kbd {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
}

/* ── Shortcuts Hint ── */
.metro-shortcuts-hint {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  opacity: 0.5;
  text-align: center;
  margin-top: 4px;
}

/* ── Info Sections ── */
.metro-info {
  margin-top: 32px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
}
.metro-info + .metro-info { margin-top: 20px; }
.metro-info h2 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--text);
  margin-bottom: 16px;
}
.metro-info ol, .metro-info ul {
  margin: 0;
  padding-left: 20px;
  color: var(--text-dim);
  line-height: 1.8;
}
.metro-info ol strong, .metro-info ul strong { color: var(--text); font-weight: 500; }
.metro-info p {
  margin: 12px 0 0;
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
}
.metro-info p:first-of-type { margin-top: 0; }
.metro-info code {
  background: rgba(16, 185, 129, 0.1);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent);
}
.metro-info a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.metro-info a:hover { opacity: 0.8; }
.metro-info--links { background: transparent; border: none; padding: 0 4px; text-align: center; }
.metro-info--links p { opacity: 0.6; font-size: 0.85rem; }

/* ── Tempo Table ── */
.metro-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 0.875rem;
}
.metro-table th,
.metro-table td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--bg-card-border);
}
.metro-table th {
  color: var(--text);
  font-weight: 500;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.metro-table td { color: var(--text-dim); }
.metro-table td:first-child { color: var(--text); font-weight: 500; }

/* ── Shortcuts Table ── */
.metro-keys {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 16px;
  margin-top: 12px;
  font-size: 0.875rem;
}
.metro-keys kbd {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-align: center;
}
.metro-keys span { color: var(--text-dim); }

/* ── Responsive ── */
@media (max-width: 600px) {
  .metronome-page { padding: 32px 16px 64px; }
  .metro-card { padding: 24px 16px 20px; }
  .metro-bpm__value { font-size: clamp(3rem, 10vw, 4.5rem); }
  .metro-controls { flex-direction: column; gap: 10px; }
  .metro-actions { flex-direction: column; align-items: center; }
  .metro-btn { width: 100%; justify-content: center; }
  .pendulum-container { height: 120px; }
  .pendulum-arm { height: 105px; }
  .beat-dot { width: 22px; height: 22px; }
}