/* Interactive Circle of Fifths. Reuses global tokens from /style.css. */
.cf-intro { color: var(--muted); font-size: 16px; line-height: 1.55; max-width: 60ch; margin: 0 0 20px; }
.cf-intro strong { color: var(--ink); font-weight: 650; }

.cf-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 22px; align-items: start; }
@media (max-width: 720px) { .cf-layout { grid-template-columns: 1fr; } }

.cf-wheelwrap { background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 12px; }
.cf-wheel { width: 100%; height: auto; display: block; touch-action: manipulation; }

/* sectors */
.cf-sector { cursor: pointer; transition: fill .15s; }
.cf-sector.major { fill: var(--card); stroke: var(--border); stroke-width: 1; }
.cf-sector.minor { fill: rgba(255,255,255,.02); stroke: var(--border); stroke-width: 1; }
.cf-sector:hover { fill: var(--accent-soft); }
.cf-sector.is-sel { fill: var(--accent); }
.cf-seg-label { font-family: inherit; font-weight: 650; fill: var(--ink); text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.cf-sector.is-sel + .cf-seg-label, .cf-seg-label.on-sel { fill: #fff; }
.cf-center-fill { fill: var(--bg); stroke: var(--border); }
.cf-center-key { fill: var(--ink); text-anchor: middle; font-weight: 700; }
.cf-center-sub { fill: var(--muted); text-anchor: middle; font-weight: 500; }

/* detail panel */
.cf-panel { background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 20px; }
.cf-panel h2 { margin: 0 0 2px; font-size: 26px; font-weight: 700; color: var(--ink); }
.cf-panel .cf-rel { color: var(--muted); font-size: 14px; margin: 0 0 16px; }
.cf-row { margin-bottom: 16px; }
.cf-row-label { font-size: 12px; text-transform: uppercase; letter-spacing: .07em; color: var(--accent); margin-bottom: 7px; }
.cf-sig { font-size: 15px; color: var(--ink); font-weight: 600; }
.cf-sig small { color: var(--muted); font-weight: 400; }
.cf-modetoggle { display: inline-flex; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; margin-bottom: 4px; }
.cf-modetoggle button { appearance: none; border: 0; background: var(--card); color: var(--muted); font-size: 13.5px; font-weight: 600; padding: 7px 14px; cursor: pointer; }
.cf-modetoggle button + button { border-left: 1px solid var(--border); }
.cf-modetoggle button.is-sel { background: var(--accent-soft); color: var(--ink); }

.cf-chords { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.cf-chord { appearance: none; border: 1px solid var(--border); border-radius: 10px; background: var(--card); color: var(--ink); padding: 9px 2px; cursor: pointer; text-align: center; transition: border-color .15s, background .15s, transform .08s; }
.cf-chord:hover { border-color: var(--accent); }
.cf-chord:active { transform: scale(.96); }
.cf-chord.primary { background: var(--accent-soft); border-color: var(--accent); }
.cf-chord .cf-rn { display: block; font-size: 13px; font-weight: 700; }
.cf-chord .cf-nm { display: block; font-size: 11px; color: var(--muted); margin-top: 2px; }
@media (max-width: 400px) { .cf-chord .cf-nm { font-size: 10px; } }

.cf-play { appearance: none; margin-top: 4px; width: 100%; padding: 12px; border: 0; border-radius: 12px; background: var(--accent); color: #fff; font-size: 15px; font-weight: 700; cursor: pointer; }
.cf-play:hover { filter: brightness(1.08); }
.cf-hint { color: var(--muted); font-size: 13.5px; line-height: 1.5; margin: 10px 0 0; }
.cf-tip { color: var(--muted); font-size: 14px; line-height: 1.5; margin: 18px 0 0; }