/* ─── Circle of Fifths Container ───────────────────── */
.circle-section {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

/* ─── CoF Panel Header Row (label + ⓘ button) ─────── */
.cof-panel-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.cof-panel-header-row .panel-collapse-header {
  flex: 1;
}
.cof-info-btn {
  flex-shrink: 0;
  background: none;
  border: 1px solid transparent;
  border-radius: 50%;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--text-hint, #64748b);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  line-height: 1;
  padding: 0;
}
.cof-info-btn:hover,
.cof-info-btn--active {
  color: var(--blue-sky, #38bdf8);
  border-color: var(--blue-sky, #38bdf8);
}

/* ─── CoF Inline Instructions ────────────────────── */
.cof-instructions {
  background: rgba(56,189,248,0.07);
  border: 1px solid rgba(56,189,248,0.2);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 10px;
  font-size: 0.75rem;
  color: var(--text-secondary, #94a3b8);
  line-height: 1.6;
}
.cof-instructions strong {
  display: block;
  color: var(--text-primary, #e2e8f0);
  font-size: 0.78rem;
  margin-bottom: 6px;
}
.cof-instructions ul {
  margin: 0;
  padding-left: 16px;
}
.cof-instructions li {
  margin-bottom: 3px;
}
.cof-instructions li strong {
  display: inline;
  color: var(--blue-sky, #38bdf8);
  font-size: inherit;
  margin-bottom: 0;
}

#circle-of-fifths-container {
  display: flex;
  justify-content: center;
  align-items: center;
  flex: 1;
  position: relative; /* needed for tooltip absolute positioning */
}

#circle-svg {
  width: 100%;
  max-width: 380px;
  height: auto;
  display: block;
  margin: 0 auto;
  overflow: visible;
}

/* ─── Segment Styles ────────────────────────────────── */
.cof-segment-outer,
.cof-segment-inner {
  cursor: pointer;
  transition: filter 0.15s, opacity 0.15s;
}
.cof-segment-outer:hover { filter: brightness(1.25) !important; }
.cof-segment-inner:hover { filter: brightness(1.15) !important; }

/* Active (detected key) */
.cof-active-outer { stroke: var(--accent-gold, #f0c040) !important; stroke-width: 2.5 !important; }
.cof-active-inner { stroke: var(--accent-gold, #f0c040) !important; stroke-width: 2 !important; }

/* Chord preview hover highlight */
.cof-preview { stroke: #ffffff !important; stroke-width: 2 !important; filter: brightness(1.3) !important; }

/* ─── Key Labels ────────────────────────────────────── */
.cof-label-major {
  fill: #ffffff;
  font-size: 13px;
  font-weight: 700;
  text-anchor: middle;
  dominant-baseline: middle;
  font-family: system-ui, sans-serif;
  pointer-events: none;
}

.cof-label-minor {
  fill: rgba(255, 255, 255, 0.75);
  font-size: 9px;
  font-weight: 500;
  text-anchor: middle;
  dominant-baseline: middle;
  font-family: system-ui, sans-serif;
  pointer-events: none;
}

/* ─── Center Text ───────────────────────────────────── */
.cof-center-text {
  fill: #ffffff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-anchor: middle;
  dominant-baseline: auto;
  font-family: system-ui, sans-serif;
  pointer-events: none;
}

/* ─── Roman Numeral Labels (inside segments) ──────── */
.cof-numeral-label {
  font-size: 9px;
  font-weight: 700;
  font-family: system-ui, sans-serif;
  fill: rgba(255,255,255,0.5);
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
}
.cof-numeral-label.cof-numeral-active {
  fill: rgba(255,255,255,0.95);
}

/* ─── Root Motion Arcs ────────────────────────────── */
.cof-motion-arc {
  opacity: 0.8;
  transition: opacity 0.2s;
  pointer-events: none;
}

/* ─── Function Flowchart ───────────────────────────── */
#function-flowchart {
  padding: 8px 12px 10px;
  border-top: 1px solid var(--border, #2d2d4e);
}

.fn-flow-svg {
  width: 100%;
  max-width: 380px;
  height: auto;
  display: block;
  margin: 0 auto;
}

.fn-trace {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3px;
  margin-top: 6px;
  padding: 4px 0;
}
.fn-trace-label {
  font-size: 0.68rem;
  color: var(--text-hint, #5a5a7a);
  margin-right: 4px;
  font-weight: 600;
}
.fn-trace-badge {
  display: inline-block;
  font-size: 0.62rem;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 3px;
  border: 1px solid;
  letter-spacing: 0.03em;
}
.fn-trace-chromatic {
  background: #4a4a6a22;
  color: #7a7a9a;
  border-color: #5a5a7a44;
}
.fn-trace-arrow {
  font-size: 0.6rem;
  color: var(--text-hint, #5a5a7a);
  opacity: 0.5;
}

/* ─── Circle Tooltip ─────────────────────────────────── */
.cof-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(8, 10, 28, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 7px;
  padding: 6px 11px;
  font-size: 0.72rem;
  color: #e2e8f0;
  white-space: nowrap;
  z-index: 30;
  line-height: 1.5;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
}

/* ─── Circle Detail Card ─────────────────────────────── */
.cof-detail-card {
  margin-top: 10px;
  background: rgba(12, 16, 44, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 13px 15px;
  font-size: 0.8rem;
  color: #cbd5e1;
  line-height: 1.5;
}
.cof-detail-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: #f1f5f9;
  margin-bottom: 3px;
}
.cof-detail-quality {
  font-weight: 400;
  color: #94a3b8;
  font-size: 0.85rem;
}
.cof-detail-numeral {
  font-size: 0.85rem;
  color: #93c5fd;
  font-weight: 600;
}
.cof-detail-func {
  font-size: 0.75rem;
  color: #6ee7b7;
  font-weight: 500;
}
.cof-detail-sub {
  font-size: 0.72rem;
  color: #64748b;
  margin-bottom: 10px;
}
.cof-detail-explanation {
  font-size: 0.76rem;
  color: #94a3b8;
  font-style: italic;
  margin-bottom: 10px;
  border-left: 2px solid rgba(99,102,241,0.4);
  padding-left: 8px;
}
.cof-detail-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #475569;
  margin-bottom: 5px;
  margin-top: 8px;
}
.cof-diatonic-row {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 4px;
  align-items: center;
}
.cof-diatonic-chip {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  padding: 2px 7px;
  font-size: 0.72rem;
  color: #e2e8f0;
}
.cof-detail-arrow {
  font-size: 0.85rem;
  color: #475569;
}
.cof-detail-set-key-btn {
  display: inline-block;
  margin-top: 10px;
  background: linear-gradient(135deg, #1d4ed8, #2563eb);
  border: 1px solid #3b82f6;
  color: #eff6ff;
  font-size: 0.75rem;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s;
}
.cof-detail-set-key-btn:hover {
  background: linear-gradient(135deg, #2563eb, #3b82f6);
}

/* ─── Detail card slide-in animation ────────────────── */
@keyframes cofDrawerIn {
  from { opacity: 0; transform: translateY(-5px); }
  to   { opacity: 1; transform: translateY(0); }
}
.cof-detail-card[style*="display: none"] { animation: none; }
.cof-detail-card:not([style*="display: none"]) { animation: cofDrawerIn 0.18s ease; }

/* ─── Borrowed chord chips ───────────────────────────── */
.cof-borrowed {
  border-color: rgba(234, 179, 8, 0.35) !important;
  color: #fbbf24 !important;
}

/* ─── Next chord action chips ────────────────────────── */
.cof-next-chip {
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 0.72rem;
  cursor: pointer;
  transition: background 0.12s;
}
.cof-next-chip:hover {
  background: rgba(37, 99, 235, 0.35);
  border-color: rgba(59, 130, 246, 0.6);
}

/* ─── Cadence chips ──────────────────────────────────── */
.cof-cadence-chip {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: #6ee7b7;
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 0.72rem;
}

/* ─── Transpose row ──────────────────────────────────── */
.transpose-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 8px;
  padding: 4px 0;
}
.transpose-label {
  font-size: 0.68rem;
  color: var(--text-muted, #64748b);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* ─── Compare mode highlight ─────────────────────────── */
.cof-compare-seg {
  filter: brightness(1.7) drop-shadow(0 0 7px #f59e0b) !important;
  stroke: #f59e0b !important;
  stroke-width: 2.5 !important;
}