:root{font-family:Geist,Arial,sans-serif;color:#27272a;background:#fafafa;font-synthesis:none;--accent:#7c3aed;--border:#e4e4e7}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #a78bfa;outline-offset:3px}button{color:inherit}button:disabled{opacity:.35;cursor:default}[hidden]{display:none!important}.app{max-width:1480px;margin:auto;padding:0 40px}header{height:88px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none;font-weight:600}.brand-mark{display:grid;place-items:center;background:#27272a;color:#fff;border-radius:7px;width:29px;height:29px;font-size:16px}.studio{color:#a1a1aa;font-weight:400}.pill{border:1px solid var(--border);background:#fff;border-radius:20px;padding:6px 9px;font-size:10px;letter-spacing:.06em;white-space:nowrap}.intro{display:flex;align-items:center;justify-content:space-between;gap:24px;margin:36px 0 28px}.eyebrow{font-size:10px;letter-spacing:.13em;font-weight:600;color:var(--accent)}h1{font-size:36px;font-weight:500;letter-spacing:-1.5px;margin:8px 0}p{font-size:14px;color:#71717a;line-height:1.5}.intro p:last-child{margin:8px 0 0}.tabs{display:flex;background:#f0f0f2;border:1px solid var(--border);padding:4px;border-radius:12px;gap:4px}.tabs button{border:0;background:transparent;border-radius:8px;padding:12px 20px;font-weight:600}.tabs button[aria-selected=true]{background:white;box-shadow:0 1px 3px #00000014}.tabs small{display:block;font-weight:400;color:#71717a;font-size:11px;margin-top:4px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:24px;align-items:start}.instrument{border:1px solid var(--border);background:#fff;border-radius:16px;overflow:hidden;min-width:0}.instrument-bar{padding:18px 22px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--border);font-size:13px}.instrument-bar>div{display:flex;align-items:center;gap:10px}.live-dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}#range-label{color:#a1a1aa;font-size:11px}.quiet{border:1px solid var(--border);background:white;padding:7px 10px;border-radius:7px;font-size:11px}.stage{position:relative;aspect-ratio:1.3;isolation:isolate;background:#f5f5f5;overflow:hidden}.pads{position:absolute;inset:0}.stage canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:10}.stage-caption{position:absolute;bottom:1.8%;left:3%;font-size:9px;letter-spacing:.15em;color:#a1a1aa;pointer-events:none}.drum{position:absolute;aspect-ratio:1;border:0;padding:0;background:transparent;border-radius:50%;touch-action:none;user-select:none}.drum img{width:100%;height:100%;display:block;border-radius:50%;pointer-events:none}.drum .sound-label{position:absolute;left:50%;top:56%;transform:translate(-50%,-50%);display:flex;flex-direction:column;align-items:center;gap:4px;font-size:clamp(9px,1vw,13px);font-weight:600;white-space:nowrap;background:#fafafae8;border:1px solid #e4e4e780;padding:5px 9px;border-radius:6px;pointer-events:none}.drum kbd{font-size:10px;color:#71717a;font-weight:400}.drum:after{content:'';position:absolute;inset:5%;border:3px solid transparent;border-radius:50%;pointer-events:none}.drum.active:after{border-color:var(--accent)}.drum.active img{filter:brightness(.87)}.aux-row{position:absolute;left:7%;right:7%;bottom:6%;display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.aux-pad{background:#e9e9ec;border:1px solid #d4d4d8;border-bottom-width:4px;border-radius:9px;min-height:46px;touch-action:none;user-select:none}.aux-pad .sound-label{display:flex;gap:8px;justify-content:center;align-items:center;font-size:11px}.aux-pad kbd{color:#71717a;font-size:10px}.aux-pad.active{background:#ede9fe;border-color:var(--accent)}.play-help{display:flex;justify-content:space-between;gap:20px;padding:17px 20px;font-size:11px;line-height:1.6;color:#52525b}.muted{color:#a1a1aa;white-space:nowrap}aside{display:flex;flex-direction:column;gap:16px}.panel{background:white;border:1px solid var(--border);border-radius:14px;padding:18px}.panel-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}h2{font-size:13px;margin:0;font-weight:600}.camera-preview{position:relative;aspect-ratio:16/10;background:#f4f4f5;border-radius:9px;overflow:hidden}.camera-preview video{height:100%;width:100%;object-fit:cover;transform:scaleX(-1)}#empty{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;font-size:12px;color:#71717a}#empty small{font-size:10px;color:#a1a1aa}#camera-badge{position:absolute;left:9px;bottom:9px;background:#ffffffe8;border-radius:4px;padding:4px 6px;font-size:8px;letter-spacing:.06em}#camera-badge.live{color:var(--accent)}.primary{width:100%;background:var(--accent);border:0;color:white;font-weight:500;border-radius:8px;padding:12px;margin-top:14px;font-size:12px}.primary.stop{background:#27272a}#status{font-size:11px;margin:10px 0 0;line-height:1.6}#status.error{color:#b91c1c}.range-label{display:flex;align-items:center;justify-content:space-between;font-size:11px;margin:18px 0 8px}.range-label output{color:#71717a;font-variant-numeric:tabular-nums}input[type=range]{width:100%;height:4px;accent-color:var(--accent);cursor:pointer;display:block;margin:8px 0 12px}.select-label{display:block;font-size:11px;margin:20px 0 8px}select{background:#fafafa;border:1px solid var(--border);border-radius:6px;padding:8px;color:#52525b;font-size:11px}#fingers{width:100%}.check{display:flex;align-items:center;gap:7px;font-size:11px;white-space:nowrap}.check input{accent-color:var(--accent)}.labels{margin-top:14px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.stats span{display:block;font-size:9px;color:#a1a1aa;margin-bottom:8px}.stats strong{font-weight:500;font-size:13px}.piano-controls{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px;border-bottom:1px solid var(--border);flex-wrap:wrap;font-size:11px}.piano-controls label:not(.check){display:flex;align-items:center;gap:10px}.octave{display:flex;align-items:center;gap:9px}.octave button{border:1px solid var(--border);background:white;border-radius:5px;width:27px;height:27px}.octave output{font-variant-numeric:tabular-nums}.keys{aspect-ratio:1.65;background:#f4f4f5}.keys .pads{left:3%;right:3%;top:14%;bottom:15%;background:#27272a;border:7px solid #27272a;border-top-width:16px;border-radius:5px;overflow:hidden}.piano-key{position:absolute;top:0;border:1px solid #d4d4d8;border-radius:0 0 4px 4px;background:#fff;height:100%;padding:0;touch-action:none;user-select:none;box-shadow:inset 0 -6px 0 #e4e4e7}.piano-key.black{background:#27272a;color:#fff;height:62%;z-index:2;border-color:#18181b;box-shadow:inset 0 -5px 0 #09090b}.piano-key.active{background:#ede9fe;box-shadow:inset 0 -6px 0 var(--accent)}.piano-key.black.active{background:#7c3aed;box-shadow:inset 0 -5px 0 #5b21b6}.piano-key .sound-label{position:absolute;bottom:15px;left:0;right:0;display:flex;flex-direction:column;gap:10px;font-size:clamp(8px,.9vw,12px);pointer-events:none}.piano-key kbd{font-size:9px;color:#a1a1aa}.piano-key.black .sound-label{bottom:12px;font-size:9px}.piano-key.black kbd{color:#d4d4d8}.hide-labels .sound-label{visibility:hidden}footer{display:flex;justify-content:space-between;gap:20px;font-size:10px;color:#a1a1aa;padding:25px 0 35px}kbd{font-family:inherit}@media(min-width:1400px){.stage.drums{aspect-ratio:1.4}}@media(max-width:1050px){.app{padding:0 24px}.workspace{grid-template-columns:minmax(0,1fr) 250px;gap:16px}.muted{display:none}.aux-pad .sound-label{flex-direction:column;gap:3px}.instrument-bar{padding:14px}#range-label{display:none}}@media(max-width:800px){.workspace{grid-template-columns:1fr}aside{display:grid;grid-template-columns:1fr 1fr;align-items:start}.stats{grid-column:1/-1}.intro{margin-top:25px}.intro h1{font-size:30px}.tabs button{padding:10px 14px}.drum .sound-label{font-size:11px}.piano-key .sound-label{font-size:11px}}@media(max-width:520px){.app{padding:0 14px}header{height:68px}header>.pill,.studio{display:none}.intro{display:block}.tabs{margin-top:20px;width:100%}.tabs button{flex:1}.stage.drums{aspect-ratio:1.3}.drum .sound-label{font-size:8px;padding:3px 5px;gap:1px}.drum kbd{font-size:8px}.aux-row{left:4%;right:4%;gap:5px}.aux-pad{min-height:37px}.aux-pad .sound-label{font-size:8px}.stage-caption{font-size:7px}.keys{aspect-ratio:1.25}.keys .pads{left:2%;right:2%;border-left-width:3px;border-right-width:3px}.piano-key .sound-label,.piano-key.black .sound-label{font-size:7px}.piano-key kbd{font-size:7px}.piano-controls{padding:12px;gap:10px}.piano-controls .check kbd{display:none}aside{display:flex}.panel{padding:16px}.camera-preview{aspect-ratio:2}.play-help{font-size:10px;padding:12px}footer{flex-direction:column;gap:8px}}

/* Learn mode shares the actual instrument; no separate exercise mockup. */
.learn-nav{display:flex;justify-content:space-between;gap:16px;align-items:center;margin:0 0 18px}.learn-nav>div{display:flex;gap:4px;padding:4px;border:1px solid var(--border);border-radius:10px;background:#fff}.learn-nav button{border:0;border-radius:6px;background:transparent;padding:10px 18px;font-size:14px}.learn-nav button[aria-pressed=true]{background:#27272a;color:white}.learn-nav>span{font-size:12px;color:#71717a}.lesson-panel{padding:22px;border-bottom:1px solid var(--border);background:#fff}.lesson-selectors{display:flex;gap:14px}.lesson-selectors label{font-size:14px;color:#52525b;display:flex;align-items:center;gap:8px}.lesson-selectors select{font-size:14px;max-width:100%}.lesson-picker{flex:1;min-width:0}.lesson-picker select{width:100%;min-width:0}.lesson-heading{margin:23px 0 12px}.lesson-heading .eyebrow{font-size:12px}.lesson-heading h2{font-size:25px;letter-spacing:-.6px;margin:8px 0}.lesson-heading p{font-size:16px;margin:0;color:#52525b}.lesson-panel details{font-size:14px;padding:10px 0;margin-bottom:12px;color:#52525b}.lesson-panel summary{cursor:pointer;width:fit-content}.lesson-panel details p{font-size:15px;line-height:1.65;margin:12px 0 0}.lesson-actions{display:flex;gap:8px;flex-wrap:wrap}.lesson-panel button,.teacher-actions button{font-size:14px;padding:9px 12px;border:1px solid var(--border);background:white;border-radius:7px;min-height:38px}.lesson-panel button.lesson-primary{background:var(--accent);border-color:var(--accent);color:white}.lesson-panel button:disabled{opacity:.45}.lesson-settings{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:17px 0}.lesson-settings label{display:flex;align-items:center;gap:9px;font-size:13px}.lesson-settings input[type=range]{width:95px;margin:0}.lesson-settings output{min-width:58px;font-size:12px;color:#71717a}.lesson-settings select{font-size:13px}.lesson-settings #learn-slower{font-size:12px;padding:5px 9px;min-height:30px}.lesson-live{display:flex;align-items:center;justify-content:space-between;gap:15px;border-top:1px solid var(--border);padding-top:15px;margin-top:10px}.lesson-live strong{font-weight:500;font-size:14px}#lesson-count{font-size:24px;font-weight:600;color:var(--accent);min-width:30px;text-align:center}.beat-strip{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:5px;margin-top:13px}.beat-cell{text-align:center;padding:7px 0;border:1px solid var(--border);border-radius:5px;color:#71717a;font-size:13px}.beat-cell.on{background:var(--accent);border-color:var(--accent);color:white}.beat-cell small{display:block;font-size:10px;opacity:.7;margin-bottom:4px}.phrase-map{display:flex;gap:6px;overflow-x:auto;margin:12px 0;padding-bottom:7px;scrollbar-width:thin}.phrase-step{flex:0 0 auto;min-width:65px;max-width:145px;padding:8px 9px;background:#fafafa;border:1px solid var(--border);border-radius:7px;font-size:12px}.phrase-step span{display:block;font-size:11px;color:#71717a;margin-bottom:4px}.phrase-step.current{border-color:var(--accent);background:#f5f3ff}.phrase-step.done{border-color:#a1a1aa;background:#f4f4f5}.lesson-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-top:8px}.lesson-bottom .check{font-size:12px}.lesson-bottom button{font-size:12px}.lesson-bottom button[aria-pressed=true]{border-color:var(--accent);color:var(--accent);background:#f5f3ff}.teacher-panel{border-top:3px solid var(--accent)}.teacher-panel h2{font-size:15px}.teacher-tag{font-size:10px;color:var(--accent);letter-spacing:.1em}.teacher-panel #teacher-message{font-size:15px;line-height:1.65;color:#3f3f46;margin:0 0 14px}.teacher-actions{display:flex;gap:7px;flex-wrap:wrap}.teacher-actions button{font-size:12px;padding:7px 9px}.teacher-note{font-size:12px;line-height:1.5;color:#71717a;margin:13px 0 0}.teacher-results{font-size:13px;color:#52525b;padding:12px;background:#f4f4f5;border-radius:7px;margin:0 0 14px;line-height:1.8}.stage.learning .drum,.stage.learning .aux-pad,.stage.learning .piano-key{transition:opacity .15s}.stage.learning .lesson-dim{opacity:.4}.stage .lesson-target{outline:3px solid var(--accent);outline-offset:-3px}.stage .demo-playing{filter:brightness(.8)}.stage .piano-key.demo-playing{background:#c4b5fd}.stage .drum.lesson-target:after{border-color:var(--accent)}.stage .drum.lesson-target{outline:0}.learn-enabled .stage.drums{aspect-ratio:1.3}.learn-enabled .stage.keys{aspect-ratio:2}.learn-enabled .camera-preview{aspect-ratio:2}.learn-enabled .stage .sound-label{visibility:visible}.learn-enabled #show-labels{pointer-events:none}@media(max-width:1050px){.lesson-panel{padding:16px}.lesson-settings{gap:8px}.lesson-selectors{flex-wrap:wrap}.lesson-picker{flex-basis:100%}.lesson-settings input[type=range]{width:75px}}@media(max-width:800px){.teacher-panel{grid-column:1/-1}.learn-enabled aside{display:flex}.learn-nav>span{font-size:11px}.lesson-heading h2{font-size:22px}}@media(max-width:520px){.learn-nav{align-items:flex-start;flex-direction:column;gap:8px}.lesson-panel{padding:14px}.lesson-heading p{font-size:15px}.lesson-selectors select{font-size:13px}.lesson-actions{gap:6px}.lesson-actions button{flex:1;padding:9px 6px;font-size:12px}.lesson-settings{align-items:flex-start}.lesson-settings>label:last-child{flex-basis:100%}.phrase-step{font-size:11px;min-width:58px}.beat-strip{gap:3px}.beat-cell{font-size:12px}.beat-cell small{font-size:9px}.lesson-bottom #learn-next{margin-left:auto}.learn-enabled .stage.keys{aspect-ratio:1.25}.learn-enabled .stage.drums{aspect-ratio:1.3}}
@media(prefers-reduced-motion:reduce){.stage.learning .drum,.stage.learning .aux-pad,.stage.learning .piano-key{transition:none}}

.agent-panel{border-color:#ddd6fe}.agent-panel h2{font-size:15px}.agent-panel .teacher-note:first-of-type{margin-top:0}.agent-attention{border-left:1px solid var(--accent);padding:7px 0 7px 11px;font-size:12px;line-height:1.6;color:#52525b}.agent-panel details{margin-top:14px;font-size:13px;line-height:1.65}.agent-panel summary{cursor:pointer;font-weight:500}.agent-panel ol{padding-left:20px}.agent-panel li{margin-bottom:8px}.agent-panel button{font-size:12px}#agent-prompt{background:#f4f4f5;padding:12px;border-radius:7px;font-size:12px;user-select:text}.agent-advice{padding:12px;background:#fafafa;border-radius:7px;margin:14px 0}.agent-advice p{font-size:14px;line-height:1.65;white-space:pre-wrap;margin:8px 0 0}.agent-proposal{margin:15px 0;padding:17px;border:1px solid #c4b5fd;border-radius:9px;background:#faf9ff}.agent-proposal h3{font-size:18px;margin:8px 0}.agent-proposal p{font-size:14px;line-height:1.65;overflow-wrap:anywhere}.agent-proposal .proposal-pattern{font-size:12px;max-height:95px;overflow:auto}.agent-proposal small{display:block;font-size:11px;color:#71717a;margin-top:10px}.agent-focus{outline:1px solid var(--accent)!important;outline-offset:3px!important}.phrase-step.agent-focus{background:#ede9fe}.learn-nav>div{flex-wrap:wrap}#agent-mode{color:var(--accent)}@media(max-width:520px){.learn-nav>div{gap:4px}.learn-nav button{font-size:12px;padding:8px}.agent-proposal{padding:12px}}