/* ── Menu tabs ── */
.tutorial-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: center;
  margin: 0.75rem 0;
}

.tutorial-chip {
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.tutorial-chip:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.menu-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
  width: 100%;
  max-width: 720px;
  justify-content: center;
}

.menu-tab {
  flex: 1;
  max-width: 160px;
  padding: 0.6rem 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-panel);
  color: var(--text-dim);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow);
}

.menu-tab.active {
  color: var(--accent-strong);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: var(--accent-soft);
}

.menu-panel {
  display: none;
  width: 100%;
  flex-direction: column;
  align-items: center;
}

.menu-panel.active {
  display: flex;
}

.mode-card.completed::after {
  content: "✓";
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  color: var(--success);
  font-weight: 800;
}

/* ── Tutorial screen ── */
.screen-tutorial {
  align-items: stretch;
  justify-content: flex-start;
  padding-top: 0.2rem;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  max-height: calc(100dvh - var(--top-bar-height) - var(--piano-offset) - 0.25rem);
}

.tutorial-header {
  width: 100%;
  max-width: 560px;
  margin: 0 auto 0.75rem;
}

.tutorial-progress-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.tutorial-progress-bar {
  flex: 1;
  height: 8px;
  background: var(--btn-secondary-bg);
  border-radius: 4px;
  overflow: hidden;
}

.tutorial-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-strong), var(--accent-warm));
  border-radius: 4px;
  transition: width 0.4s ease;
  width: 0%;
}

.tutorial-step-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.tutorial-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text);
}

.tutorial-stage {
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  padding: 1.25rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  min-height: 200px;
  box-shadow: var(--shadow-lg);
  color: var(--text);
}

.tutorial-stage.feedback-correct {
  border-color: var(--success);
  box-shadow: 0 0 24px var(--success-glow);
}

.tutorial-stage.feedback-wrong {
  border-color: var(--error);
}

.tutorial-body h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.tutorial-body p {
  color: var(--text-dim);
  font-size: 0.88rem;
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.tutorial-body strong {
  color: var(--text);
}

.tutorial-hint {
  color: var(--accent-strong) !important;
}

.tutorial-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  justify-content: center;
}

.tutorial-btn {
  padding: 0.55rem 1.1rem;
  border-radius: 10px;
  border: none;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.tutorial-btn.primary {
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  color: #ffffff;
}

.tutorial-btn.secondary {
  background: var(--btn-secondary-bg);
  color: var(--text);
  border: 1px solid var(--border-strong);
}

.tutorial-btn.tap {
  min-width: 120px;
  min-height: 120px;
  border-radius: 50%;
  font-size: 1rem;
  background: var(--bg-panel-solid);
  color: var(--text);
  border: 3px solid var(--accent);
  box-shadow: 0 0 24px var(--accent-glow);
}

.tutorial-btn.tap:active {
  transform: scale(0.95);
}

.tutorial-btn:hover:not(:disabled) {
  transform: scale(1.03);
}

.tutorial-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* BPM */
.bpm-display {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent-strong);
  text-align: center;
  font-variant-numeric: tabular-nums;
}

[data-theme="dark"] .bpm-display {
  text-shadow: 0 0 30px var(--accent-glow);
}

.bpm-pulse {
  width: 64px;
  height: 64px;
  margin: 1rem auto;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.35;
  animation: bpmPulse 0.6s ease infinite;
}

.bpm-pulse.running {
  animation-duration: var(--beat-dur, 0.6s);
}

@keyframes bpmPulse {
  0%, 100% { transform: scale(0.85); opacity: 0.25; }
  50% { transform: scale(1.15); opacity: 0.7; }
}

.bpm-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin: 0.75rem 0;
}

.bpm-chip {
  padding: 0.35rem 0.7rem;
  border-radius: 8px;
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
  color: var(--accent-strong);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
}

.bpm-chip.selected {
  background: var(--accent-soft);
  box-shadow: 0 0 0 2px var(--accent);
}

/* Note explorer */
.note-map {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: center;
  margin: 0.75rem 0;
}

.note-map-key {
  padding: 0.4rem 0.55rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--btn-secondary-bg);
  border: 1px solid var(--border);
  color: var(--text);
}

.note-map-key.black {
  background: var(--black-key);
  color: #f8fafc;
  border-color: var(--black-key);
}

.note-map-key.lit {
  border-color: var(--accent);
  color: var(--accent-strong);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* Progressions */
.prog-chain {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin: 1rem 0;
}

.prog-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.prog-num {
  font-size: 0.65rem;
  color: var(--text-dim);
  font-weight: 700;
}

.prog-chord {
  padding: 0.5rem 0.85rem;
  border-radius: 10px;
  background: var(--accent-warm-soft);
  border: 1px solid var(--accent-warm);
  font-family: inherit;
  font-weight: 800;
  color: var(--accent-warm);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.prog-chord.active {
  transform: scale(1.08);
  box-shadow: 0 0 16px var(--accent-warm-soft);
}

.prog-arrow {
  color: var(--text-muted);
  align-self: center;
  font-size: 1.2rem;
}

/* Circle of fifths */
.circle-wrap {
  position: relative;
  width: min(280px, 85vw);
  height: min(280px, 85vw);
  margin: 0.5rem auto 1rem;
  color: var(--accent-strong);
}

.circle-svg {
  width: 100%;
  height: 100%;
}

.circle-key {
  cursor: pointer;
  transition: filter 0.2s;
}

.circle-key:hover {
  filter: brightness(1.15);
}

.circle-key.active {
  filter: drop-shadow(0 0 8px var(--accent));
}

.circle-center-label {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent-strong);
  min-height: 1.5em;
}

/* Nashville */
.nashville-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin: 1rem 0;
}

.nashville-btn {
  padding: 0.75rem 0.5rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
  color: var(--text);
  font-family: inherit;
}

.nashville-btn .num {
  display: block;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-strong);
}

.nashville-btn .chord {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
}

.nashville-btn:hover,
.nashville-btn.selected {
  border-color: var(--accent-warm);
  box-shadow: 0 0 16px var(--accent-warm-soft);
  transform: translateY(-2px);
}

.nashville-legend {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-align: center;
  padding: 0.5rem;
  background: var(--btn-secondary-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

/* Chord types */
.chord-type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.6rem;
  margin: 0.75rem 0;
}

.chord-type-card {
  padding: 0.85rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--btn-secondary-bg);
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
  color: var(--text);
  font-family: inherit;
}

.chord-type-card:hover,
.chord-type-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 18px var(--accent-glow);
}

.chord-type-card h4 {
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
  color: var(--text);
}

.chord-type-card .intervals {
  font-size: 0.7rem;
  color: var(--text-dim);
}

.chord-type-card .formula {
  font-size: 0.75rem;
  color: var(--accent-strong);
  margin-top: 0.35rem;
  font-weight: 600;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-top: 0.75rem;
}

.quiz-opt {
  padding: 0.65rem 1rem;
  text-align: left;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.quiz-opt:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--surface-hover);
}

.quiz-opt.correct {
  border-color: var(--success);
  background: var(--success-soft);
  color: var(--text);
}

.quiz-opt.wrong {
  border-color: var(--error);
  background: var(--error-soft);
  color: var(--text);
}

.tutorial-complete-badge {
  text-align: center;
  padding: 1rem;
}

.tutorial-complete-badge h3 {
  color: var(--text);
}

.tutorial-complete-badge p {
  color: var(--text-dim);
}

.tutorial-complete-badge .badge-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

@media (max-width: 480px) {
  .nashville-grid { grid-template-columns: repeat(2, 1fr); }
  .circle-wrap { width: 240px; height: 240px; }
}