/* ============================================================
   Saxophone Fingering Chart — custom styles
   ============================================================ */

/* ── Page layout ────────────────────────────────────────────── */
body {
  background-color: #f0f4f8;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: #1a252f;
}

/* ── Note selector bar ──────────────────────────────────────── */
.register-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #6c757d;
  margin-bottom: 4px;
}

.note-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}

.note-btn {
  display: inline-block;
  padding: 4px 10px;
  border: 2px solid #2c3e50;
  border-radius: 20px;
  background: #ffffff;
  color: #2c3e50;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, transform 0.1s;
  line-height: 1.4;
  white-space: nowrap;
}

.note-btn:hover {
  background: #dce8f0;
}

.note-btn.active {
  background: #1a252f;
  color: #ffffff;
  border-color: #1a252f;
  transform: scale(1.08);
}

/* ── Detail panel ───────────────────────────────────────────── */
.detail-card {
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  padding: 20px 24px;
  height: 100%;
}

.note-title {
  font-size: 2.4rem;
  font-weight: 700;
  color: #1a252f;
  line-height: 1.1;
  margin-bottom: 2px;
}

.note-subtitle {
  font-size: 0.9rem;
  color: #6c757d;
  margin-bottom: 16px;
}

.note-meta {
  margin-bottom: 16px;
}

.note-meta dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #6c757d;
  font-weight: 600;
}

.note-meta dd {
  font-size: 1rem;
  color: #1a252f;
  font-weight: 500;
  margin-bottom: 10px;
}

/* ── VexFlow notation container ─────────────────────────────── */
#notation {
  overflow-x: auto;
  min-height: 120px;
}

#notation svg {
  display: block;
}

/* ── Fingering diagram card ──────────────────────────────────── */
.diagram-card {
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  padding: 16px;
  text-align: center;
}

.diagram-card h6 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #6c757d;
  margin-bottom: 12px;
}

#fingering-diagram svg {
  display: inline-block;
  max-width: 100%;
}

/* ── Key legend ─────────────────────────────────────────────── */
.key-legend {
  font-size: 0.78rem;
  color: #6c757d;
  margin-top: 12px;
}

.legend-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid #2c3e50;
  vertical-align: middle;
  margin-right: 4px;
}

.legend-dot.pressed {
  background: #1a252f;
}

.legend-dot.open {
  background: #ffffff;
}

/* ── Responsive tweaks ──────────────────────────────────────── */
@media (max-width: 575px) {
  .note-btn {
    font-size: 0.76rem;
    padding: 3px 8px;
  }
  .note-title {
    font-size: 1.8rem;
  }
}