.choice-number{display:inline-grid;place-items:center;width:1.65rem;height:1.65rem;margin-right:.55rem;border:1px solid var(--line-dark);border-radius:50%;font:700 .72rem var(--font-mono);color:var(--muted);vertical-align:middle}.composer-choice-grid button,.instrument-choice-grid button{display:flex;align-items:center;gap:.25rem;transition:transform .13s ease,background .13s ease,border-color .13s ease}.composer-choice-grid button:not(:disabled):hover,.instrument-choice-grid button:not(:disabled):hover{transform:translateY(-1px);background:var(--surface-muted)}.tempo-presets{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:.45rem;margin:.8rem 0 1.2rem}.tempo-presets button{min-height:38px;border:1px solid var(--line-dark);background:var(--paper-strong);color:var(--ink);font:700 .8rem var(--font-mono);cursor:pointer}.tempo-presets button:hover{background:var(--surface-muted)}.music-toolbar input[type=number],.music-toolbar select{min-width:130px}.music-toolbar>span.keyboard-hint{align-self:center}.progression span{transition:transform .13s ease,box-shadow .13s ease}.progression span:hover{transform:translateY(-2px);box-shadow:var(--shadow-soft)}.composer-game-card .composer-choice-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.music-finish{position:relative;overflow:hidden}.music-finish:before{content:"";position:absolute;inset:0 auto 0 0;width:4px;background:var(--primary)}.composer-game-card .music-stat-strip,.instrument-quiz-card .music-stat-strip{grid-template-columns:repeat(auto-fit,minmax(95px,1fr))}.music-lab-card button:focus-visible,.music-lab-card input:focus-visible,.music-lab-card select:focus-visible{outline:3px solid var(--primary-soft);outline-offset:2px}.music-lab-card button:disabled{cursor:not-allowed}.theory-readout span{line-height:1.45}.metronome-display{padding:.6rem 0}.tap-tempo-panel strong{display:block;font-family:var(--font-display);font-size:1.6rem;font-weight:500}.tap-tempo-panel div>button{margin-top:.45rem}.frequency-panel p{line-height:1.5}.fifths-info .music-controls{margin-top:1rem}.composer-progress{overflow:hidden;border-radius:999px}.composer-progress>span{border-radius:inherit}.proof-sheet .composer-progress{position:relative;margin:1rem 3rem .15rem 0;height:4px}.music-answer-grid button{transition:transform .12s ease,background .12s ease}.music-answer-grid button:not(:disabled):hover{transform:translateY(-1px)}.music-hub-lede{max-width:800px!important;font-size:1.15rem!important;line-height:1.65}.hub-proof-strip{display:flex;flex-wrap:wrap;gap:.45rem;margin:1.35rem 0 3rem}.hub-proof-strip span,.music-card-tag{display:inline-flex;align-items:center;border:1px solid var(--line-dark);background:var(--surface-muted);padding:.35rem .6rem;font:700 .68rem var(--font-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted-strong)}.music-hub .music-card-grid>a>.music-card-tag{color:var(--ink)!important}.music-hub-section{margin:3.2rem 0}.music-hub-heading{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.8fr);gap:2rem;align-items:end;margin-bottom:1rem}.music-hub-heading h2{margin:.2rem 0 0;font-size:clamp(2rem,4vw,3rem)}.music-hub-heading>p{margin:0;color:var(--muted-strong);line-height:1.55}.music-hub .music-card-grid{margin-top:0}.music-hub .music-card-grid>a{position:relative;display:flex;flex-direction:column;align-items:flex-start;min-height:220px}.music-hub .music-card-grid h3{margin:.85rem 0 .45rem;font-size:1.55rem}.music-hub .music-card-grid p{min-height:0;line-height:1.5}.music-hub .music-card-grid strong{margin-top:auto;color:var(--primary-text)}.music-hub-cta{display:flex;justify-content:space-between;align-items:center;gap:2rem;margin:4rem 0 1rem;padding:1.5rem 1.7rem;border:1px solid var(--line-dark);background:var(--surface-muted);box-shadow:var(--shadow-soft)}.music-hub-cta h2{margin:.2rem 0 .35rem;font-size:2rem}.music-hub-cta p{margin:0;max-width:650px;color:var(--muted-strong)}.music-hub-cta .button{flex:0 0 auto;text-decoration:none}.fifths-wheel{width:100%;max-width:520px;min-width:320px;justify-self:center;isolation:isolate;overflow:visible}.fifths-wheel button{z-index:3;box-shadow:0 1px 0 rgba(0,0,0,.08);cursor:pointer}.fifths-wheel button:hover{transform:translate(-50%,-50%) scale(1.07);box-shadow:var(--shadow-soft)}.fifths-center{z-index:1;min-width:150px;min-height:150px;place-content:center;border-radius:50%;background:var(--surface);box-shadow:0 0 0 1px var(--line)}.fifths-center,.fifths-center span,.fifths-center strong{pointer-events:none}@media(max-width:760px){.tempo-presets{grid-template-columns:repeat(3,1fr)}.composer-game-card .composer-choice-grid{grid-template-columns:1fr}.music-toolbar input[type=number],.music-toolbar select{width:100%;min-width:0}.music-toolbar label{width:100%}.music-toolbar .segmented{width:100%;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));max-width:100%}.music-toolbar .segmented button{min-width:0;width:100%;white-space:normal}.music-stat-strip{overflow:visible;grid-auto-flow:row;grid-auto-columns:auto;grid-template-columns:repeat(2,minmax(0,1fr))}.progression small{font-size:.68rem}.choice-number{flex:0 0 auto}.music-hub-heading{grid-template-columns:1fr;gap:.4rem}.music-hub-cta{align-items:flex-start;flex-direction:column}.music-hub .music-card-grid>a{min-height:0}.fifths-wheel{width:100%;max-width:430px;min-width:0}.fifths-center{min-width:118px;min-height:118px}.fifths-wheel button{width:48px;height:48px}}@media(prefers-reduced-motion:reduce){.composer-choice-grid button,.composer-mask span,.fifths-wheel button,.instrument-choice-grid button,.music-answer-grid button,.progression span{transition:none}.tempo-pulse.is-running span{animation:none}}