.fff-rt-app{color:#171714;background:#f2efe8;width:100%;max-width:100%;overflow-x:clip;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;--ink: #171714;--muted: #6b6961;--line: #d8d4ca;--paper: #fffefa;--surface: #f2efe8;--accent: #5a48ff;--accent-dark: #4030d8;--success: #198754;--warning: #c77713;--danger: #c84545;--topbar-height: 72px}.fff-rt-app,.fff-rt-app *{box-sizing:border-box}.fff-rt-app{min-width:320px;background:var(--surface)}.fff-rt-app{margin:0;min-width:320px;min-height:100vh;min-height:100svh;background:var(--surface)}.fff-rt-app button,.fff-rt-app input{font:inherit}.fff-rt-app button{color:inherit}.fff-rt-app .topbar{height:var(--topbar-height);display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 34px;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--surface) 94%,transparent);position:sticky;top:0;z-index:20;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.fff-rt-app .brand{width:fit-content;display:inline-flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-weight:780;letter-spacing:-.025em;font-size:20px}.fff-rt-app .brand__mark{width:28px;height:28px;display:flex;align-items:center;justify-content:center;gap:2px;border-radius:50%;background:var(--ink)}.fff-rt-app .brand__mark i{display:block;width:2px;border-radius:2px;background:var(--paper)}.fff-rt-app .brand__mark i:nth-child(1){height:7px}.fff-rt-app .brand__mark i:nth-child(2){height:14px}.fff-rt-app .brand__mark i:nth-child(3){height:10px}.fff-rt-app .brand__mark i:nth-child(4){height:5px}.fff-rt-app .prototype-label{color:var(--muted);font-size:13px;font-weight:650;letter-spacing:.02em}.fff-rt-app .stage-progress{justify-self:end;display:flex;align-items:center;gap:12px;color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}.fff-rt-app .stage-progress__track{display:block;width:84px;height:3px;overflow:hidden;background:#d1cdc3;border-radius:4px}.fff-rt-app #progress-fill{display:block;width:33.333%;height:100%;background:var(--accent);transform-origin:left;transition:width .32s cubic-bezier(.2,.8,.2,1)}.fff-rt-app .workspace{min-height:calc(100svh - var(--topbar-height));display:grid;grid-template-columns:minmax(270px,330px) minmax(0,1fr)}.fff-rt-app .context-panel{min-width:0;padding:48px 34px 34px;border-right:1px solid var(--line)}.fff-rt-app .eyebrow{margin:0 0 10px;color:var(--accent-dark);font-size:11px;font-weight:800;line-height:1.2;letter-spacing:.11em;text-transform:uppercase}.fff-rt-app .context-panel h2{margin:0;max-width:280px;font-size:clamp(36px,4vw,58px);line-height:.98;letter-spacing:-.055em;font-weight:760}.fff-rt-app .exercise-copy{margin:24px 0 0;max-width:290px;color:var(--muted);font-size:15px;line-height:1.6}.fff-rt-app .exercise-meta{margin:34px 0 0;display:grid;grid-template-columns:repeat(3,1fr);padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.fff-rt-app .exercise-meta div{display:grid;gap:5px}.fff-rt-app .exercise-meta dt{color:var(--muted);font-size:11px}.fff-rt-app .exercise-meta dd{margin:0;font-size:13px;font-weight:720}.fff-rt-app .exercise-nav{margin-top:36px;display:grid;max-height:360px;overflow-y:auto;padding-right:8px;scrollbar-width:thin}.fff-rt-app .exercise-nav__item{width:100%;min-height:58px;display:grid;grid-template-columns:32px minmax(0,1fr);position:relative;align-items:center;gap:8px;padding:0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;cursor:pointer;transition:color .18s ease,padding .18s ease}.fff-rt-app .exercise-nav__item span{color:#aaa69d;font-size:11px;font-variant-numeric:tabular-nums}.fff-rt-app .exercise-nav__item strong{font-size:13px;font-weight:650}.fff-rt-app .exercise-nav__item:hover{padding-left:5px}.fff-rt-app .exercise-nav__item.is-active{color:var(--accent-dark)}.fff-rt-app .exercise-nav__item.is-active span{color:var(--accent)}.fff-rt-app .exercise-nav__item.is-complete:after{content:"✓";position:absolute;right:2px;color:var(--success);font-size:12px;font-weight:800}.fff-rt-app .exercise-nav__item.is-complete strong{padding-right:22px}.fff-rt-app .practice-panel{min-width:0;display:flex;flex-direction:column;padding:36px clamp(24px,5vw,76px) max(28px,env(safe-area-inset-bottom));background:var(--paper)}.fff-rt-app .practice-panel__header{display:flex;justify-content:space-between;align-items:center;min-height:42px}.fff-rt-app .notation-help{margin:0;color:var(--muted);font-size:12px}.fff-rt-app .tempo-light{display:grid;grid-template-columns:repeat(4,7px);gap:6px}.fff-rt-app .tempo-light span{width:7px;height:7px;border-radius:50%;background:#d8d4ca;transition:transform .11s ease,background .11s ease}.fff-rt-app .tempo-light span.is-current{transform:scale(1.65);background:var(--accent)}.fff-rt-app .notation-stage{position:relative;flex:1 1 auto;width:100%;min-width:0;max-width:100%;min-height:270px;margin:18px 0 0;display:flex;align-items:center;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.fff-rt-app #notation{flex:0 0 auto;width:100%;min-width:0;will-change:transform;transition:opacity .18s ease}.fff-rt-app #notation.is-switching{opacity:0}.fff-rt-app #notation svg{width:100%;height:auto;overflow:visible}.fff-rt-app .playhead{--playhead-x: 0px;position:absolute;left:0;top:50%;z-index:4;width:1px;height:112px;opacity:0;transform:translate3d(var(--playhead-x),-50%,0);pointer-events:none;will-change:transform;transition:opacity .14s ease}.fff-rt-app .playhead.is-visible{opacity:1}.fff-rt-app .playhead.is-waiting{opacity:.38}.fff-rt-app .playhead__line{position:absolute;inset:8px 0 0;width:2px;border-radius:2px;background:var(--accent);box-shadow:0 0 0 1px color-mix(in srgb,var(--paper) 72%,transparent)}.fff-rt-app .playhead__handle{position:absolute;left:-4px;top:0;width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;border-top:7px solid var(--accent)}.fff-rt-app #notation .rhythm-event{transition:opacity .12s ease,filter .12s ease}.fff-rt-app #notation .rhythm-event.is-upcoming{opacity:.42}.fff-rt-app #notation .rhythm-event.is-current{filter:drop-shadow(0 0 .3px var(--accent))}.fff-rt-app #notation .rhythm-event.is-current path{fill:var(--accent)!important;stroke:var(--accent)!important}.fff-rt-app #notation .rhythm-event.is-hit path{fill:var(--success)!important;stroke:var(--success)!important}.fff-rt-app #notation .rhythm-event.is-late path{fill:var(--warning)!important;stroke:var(--warning)!important}.fff-rt-app #notation .rhythm-event.is-miss path{fill:var(--danger)!important;stroke:var(--danger)!important}.fff-rt-app #notation .measure-barline{stroke:var(--ink);stroke-width:1.4;vector-effect:non-scaling-stroke}.fff-rt-app #notation .measure-barline--final-thin{stroke-width:1.2}.fff-rt-app #notation .measure-barline--final{stroke-width:2.6}.fff-rt-app .countdown{position:absolute;inset:0;display:grid;place-items:center;background:color-mix(in srgb,var(--paper) 88%,transparent);opacity:0;pointer-events:none;transition:opacity .16s ease}.fff-rt-app .countdown.is-visible{opacity:1}.fff-rt-app .countdown span{color:var(--accent);font-size:clamp(80px,14vw,170px);font-weight:780;letter-spacing:-.08em;animation:countdownBeat .62s cubic-bezier(.2,.8,.2,1)}@keyframes countdownBeat{0%{transform:scale(.7);opacity:0}24%{transform:scale(1);opacity:1}to{transform:scale(.92);opacity:.2}}.fff-rt-app .status-line{min-height:46px;display:flex;align-items:center;gap:10px;color:var(--muted);font-size:12px}.fff-rt-app .status-line__dot{width:7px;height:7px;border-radius:50%;background:#aaa69d;transition:background .18s ease,box-shadow .18s ease}.fff-rt-app .status-line__dot.is-live{background:var(--accent);box-shadow:0 0 0 5px color-mix(in srgb,var(--accent) 12%,transparent)}.fff-rt-app .result-panel{grid-template-columns:1.2fr 1fr 1fr;align-items:end;gap:24px;padding:18px 0 20px;border-top:1px solid var(--line);animation:resultEnter .28s cubic-bezier(.2,.8,.2,1) both}.fff-rt-app .result-panel:not([hidden]){display:grid}.fff-rt-app .result-panel strong,.fff-rt-app .result-panel span{display:block}.fff-rt-app .result-panel strong{font-size:20px;line-height:1;font-variant-numeric:tabular-nums}.fff-rt-app .result-panel span{margin-top:6px;color:var(--muted);font-size:11px}.fff-rt-app .result-score strong{color:var(--accent-dark);font-size:38px;letter-spacing:-.045em}@keyframes resultEnter{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fff-rt-app .transport{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:22px;padding-top:8px}.fff-rt-app .secondary-action{justify-self:start;display:inline-flex;align-items:center;gap:9px;min-height:44px;padding:0;border:0;background:transparent;color:var(--muted);font-size:12px;font-weight:680;cursor:pointer}.fff-rt-app .secondary-action--next{justify-self:end}.fff-rt-app .secondary-action:disabled{opacity:.3;cursor:default}.fff-rt-app .secondary-action:not(:disabled):hover{color:var(--ink)}.fff-rt-app .tap-action{position:relative;isolation:isolate;width:clamp(158px,18vw,210px);aspect-ratio:2.2 / 1;display:grid;place-content:center;gap:4px;overflow:hidden;border:0;border-radius:999px;background:var(--accent);color:#fff;cursor:pointer;box-shadow:0 10px 30px color-mix(in srgb,var(--accent) 24%,transparent);transition:transform .12s ease,background .16s ease,box-shadow .16s ease;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.fff-rt-app .tap-action:hover{background:var(--accent-dark);transform:translateY(-2px)}.fff-rt-app .tap-action:active,.fff-rt-app .tap-action.is-tapped{transform:translateY(0) scale(.97)}.fff-rt-app .tap-action.is-playing{background:var(--ink);box-shadow:0 10px 30px color-mix(in srgb,var(--ink) 20%,transparent)}.fff-rt-app .tap-action__label{position:relative;z-index:2;font-size:15px;font-weight:760}.fff-rt-app .tap-action small{position:relative;z-index:2;font-size:9px;opacity:.72}.fff-rt-app .tap-action__pulse{position:absolute;width:20px;height:20px;left:var(--tap-x, 50%);top:var(--tap-y, 50%);border-radius:50%;background:#ffffff57;transform:translate(-50%,-50%) scale(0);pointer-events:none}.fff-rt-app .tap-action.is-tapped .tap-action__pulse{animation:tapRipple .42s ease-out}@keyframes tapRipple{to{transform:translate(-50%,-50%) scale(12);opacity:0}}@media(max-width:900px){.fff-rt-app{--topbar-height: 64px}.fff-rt-app .topbar{padding:0 22px;grid-template-columns:1fr auto}.fff-rt-app .prototype-label{display:none}.fff-rt-app .workspace{grid-template-columns:minmax(0,1fr)}.fff-rt-app .context-panel{padding:28px 24px 0;border-right:0}.fff-rt-app .context-panel h2{max-width:none;font-size:40px}.fff-rt-app .exercise-copy{margin-top:14px;max-width:620px}.fff-rt-app .exercise-meta{margin-top:20px;max-width:420px}.fff-rt-app .exercise-nav{margin-top:18px;display:flex;gap:8px;max-height:none;overflow-x:auto;overflow-y:hidden;padding:0 0 8px}.fff-rt-app .exercise-nav__item{flex:0 0 auto;width:auto;min-height:40px;grid-template-columns:auto auto;gap:6px;padding:0 14px;border:1px solid var(--line);border-radius:999px}.fff-rt-app .exercise-nav__item:hover{padding-left:14px}.fff-rt-app .exercise-nav__item.is-active{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 7%,transparent)}.fff-rt-app .practice-panel{padding-top:20px}.fff-rt-app .notation-stage{min-height:230px}}@media(max-width:560px){.fff-rt-app .brand{font-size:17px}.fff-rt-app .brand__mark{width:25px;height:25px}.fff-rt-app .stage-progress__track{width:48px}.fff-rt-app .context-panel{padding:22px 18px 0}.fff-rt-app .context-panel h2{font-size:34px}.fff-rt-app .exercise-copy{font-size:13px;line-height:1.5}.fff-rt-app .exercise-meta{margin-top:16px}.fff-rt-app .exercise-nav strong{font-size:12px}.fff-rt-app .practice-panel{padding:18px 18px max(18px,env(safe-area-inset-bottom))}.fff-rt-app .practice-panel__header{min-height:34px}.fff-rt-app .notation-help{display:none}.fff-rt-app .notation-stage{min-height:210px;margin-top:10px}.fff-rt-app .notation-stage:before,.fff-rt-app .notation-stage:after{content:"";position:absolute;top:0;bottom:0;z-index:3;width:16px;pointer-events:none}.fff-rt-app .notation-stage:before{left:0;background:linear-gradient(90deg,var(--paper),transparent)}.fff-rt-app .notation-stage:after{right:0;background:linear-gradient(270deg,var(--paper),transparent)}.fff-rt-app .playhead{height:104px}.fff-rt-app .status-line{min-height:38px}.fff-rt-app .result-panel{grid-template-columns:1fr 1fr;gap:14px}.fff-rt-app .result-score{grid-row:span 2}.fff-rt-app .transport{grid-template-columns:42px 1fr 42px;gap:10px}.fff-rt-app .secondary-action{width:42px;overflow:hidden;white-space:nowrap;color:transparent}.fff-rt-app .secondary-action span{color:var(--muted);font-size:20px}.fff-rt-app .secondary-action--next{justify-content:flex-end}.fff-rt-app .tap-action{width:min(100%,230px);justify-self:center}}@media(prefers-reduced-motion:reduce){.fff-rt-app,.fff-rt-app *,.fff-rt-app *:before,.fff-rt-app *:after{animation-duration:1ms!important;transition-duration:1ms!important}}