:root{--lime:#d3ee8a;--line:#344138;--muted:#a6b5ac}*{box-sizing:border-box}body{margin:0;background:#101615;color:#eef3ea;font:16px system-ui,sans-serif}aside{width:230px;position:fixed;inset:0 auto 0 0;padding:34px 24px;border-right:1px solid var(--line);background:#141c18}.brand{color:var(--lime);text-decoration:none;font-weight:800;font-size:34px;display:flex;align-items:center;gap:12px}.brand span{font-size:12px;letter-spacing:2px;max-width:90px}.eyebrow{font-size:12px;letter-spacing:1.8px;color:var(--muted);margin-top:56px}nav button{width:100%;text-align:left;background:none;border:0;color:#a9b6ad;padding:15px 12px;margin:3px 0}nav button.active{background:var(--lime);color:#182117}.asidebottom{position:absolute;bottom:35px;font-size:24px;line-height:1.5}.asidebottom span{color:var(--muted)}main{margin-left:230px;padding:0 42px}header{height:94px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);font-size:12px;letter-spacing:1.5px}h1{font-size:clamp(30px,4vw,48px);letter-spacing:-2px;margin:14px 0}h2{font-size:23px}h3{font-size:18px}p{line-height:1.65;color:var(--muted)}.intro{margin:32px 0}.tag{font-size:12px;color:var(--lime);letter-spacing:2px}.grid{display:grid;grid-template-columns:1.5fr 1fr;gap:22px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:22px 0}.card{background:#1b2421;border:1px solid var(--line);border-radius:14px;padding:25px}.hero{background:#d3ee8a;color:#1d2b1b}.hero p{color:#3b5036}.hero h2{font-size:34px}.hero .tag{color:#4e643a}.hero button{background:#1c2a1b;color:white}.metric{font-size:35px;font-weight:700}.small{font-size:14px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}button,select,input{font:inherit}button{cursor:pointer;border:1px solid var(--line);border-radius:8px;padding:11px 18px;background:#2e3b31;color:#edf4e9}button:hover{filter:brightness(1.12)}button.primary{background:var(--lime);color:#192319;border:0}select,input[type=number]{background:#18221b;color:#eef3ea;border:1px solid #435348;border-radius:7px;padding:10px;max-width:100%}input[type=range]{accent-color:var(--lime);width:180px}label{font-size:14px;color:var(--muted)}footer{font-size:12px;color:#8c9d91;padding:26px 0}.lesson{padding:16px 0;border-bottom:1px solid var(--line)}.lesson button{float:right}.pill{display:inline-block;border:1px solid #56614d;border-radius:20px;font-size:12px;padding:5px 10px;color:var(--muted)}.note{font-size:80px;font-weight:800;color:var(--lime);text-align:center;margin:15px}.meter{height:12px;background:linear-gradient(90deg,#ac6748,#d3ee8a 45%,#d3ee8a 55%,#ac6748);border-radius:9px;position:relative;margin:26px 0}.needle{position:absolute;left:50%;top:-7px;height:26px;width:3px;background:white}.highway{display:flex;gap:10px;overflow:auto;padding:32px 0;border-block:1px solid var(--line);margin:24px 0}.target{min-width:70px;text-align:center;padding:22px 10px;background:#26352b;border-radius:10px}.target.current{background:var(--lime);color:#1c2819}.target.hit{outline:2px solid #7aceab}.sequencer{display:grid;grid-template-columns:70px repeat(16,1fr);gap:5px;margin:22px 0}.step{padding:0;height:32px;border-radius:4px}.step.on{background:var(--lime)}.step.play{outline:2px solid white}.keys{display:flex;gap:30px;justify-content:center;margin:30px 0}.keycol{text-align:center}.key{border:2px solid #637667;border-radius:50%;width:58px;height:58px;margin:12px auto;display:grid;place-items:center}.key.closed{background:var(--lime);color:#152215;border-color:var(--lime)}.chords{display:flex;gap:12px;margin:22px 0}.chord{flex:1;padding:18px;background:#2c3b2e;border-radius:9px}.chord.active{background:var(--lime);color:#1a2717}.chord small{display:block;margin-top:10px}.steps li{margin:15px 0;line-height:1.7;color:#bfcec2}progress{accent-color:var(--lime);width:100%}.flash{background:#d3ee8a;color:#182619;padding:12px;border-radius:8px}.chart{width:100%;height:100px}.controls{margin:18px 0}.hint{border-left:3px solid var(--lime);padding-left:15px}.tempo{font-size:42px;font-weight:700}.beat{width:24px;height:24px;border-radius:50%;background:#35483a}.beat.active{background:var(--lime)}@media(max-width:950px){aside{width:185px;padding:25px 15px}main{margin-left:185px;padding:0 24px}.grid,.cards{grid-template-columns:1fr}.asidebottom{font-size:20px}}@media(max-width:650px){aside{position:static;width:auto;padding:18px}.brand{font-size:26px}.eyebrow,.asidebottom{display:none}nav{display:flex;overflow:auto;margin-top:15px}nav button{white-space:nowrap;width:auto;padding:10px}main{margin:0;padding:0 18px}header{height:85px;gap:12px}header span{display:none}.sequencer{gap:3px;grid-template-columns:50px repeat(16,1fr)}.card{padding:19px}.chords{flex-wrap:wrap}.chord{min-width:100px}}
aside{overflow-y:auto}.asidebottom{position:static;margin-top:30px;font-size:19px}nav button{padding-top:11px;padding-bottom:11px}.eyebrow{margin-top:34px}audio{margin-top:8px}button:disabled{opacity:.55;cursor:wait}a.pill{color:var(--lime);text-decoration:none}#report .cards{grid-template-columns:1fr}#report ul{padding-left:22px}@media(min-width:1400px){#report .cards{grid-template-columns:repeat(3,1fr)}}@media(max-width:650px){.asidebottom{display:none}}
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.filePick{display:inline-block;padding:12px;border:1px solid #637667;border-radius:8px;line-height:1.7}.filePick input{display:block;max-width:100%;margin-top:12px}#trackAudioMount{margin:22px 0}.demoLevel{min-width:48px}#trackList .row{justify-content:space-between}#trackList span{min-width:0;flex:1}footer a{color:var(--lime)}

.songLayout{display:grid;grid-template-columns:minmax(230px,1fr) minmax(0,2fr);gap:22px}.songLayout label{display:block;margin:12px 0}.songLayout input[type=search]{width:100%;box-sizing:border-box}.songChoice{display:block;width:100%;text-align:left;margin:8px 0;padding:14px;min-height:64px}.songChoice span{display:block;font-size:12px;opacity:.7;margin-top:5px}.songChoice.active{border-color:#d3ee8a}.songVideo{aspect-ratio:16/9;min-height:200px;background:#101713;border-radius:12px;display:grid;place-items:center;margin:16px 0;overflow:hidden}.songVideo p{padding:20px}.songVideo iframe{width:100%;height:100%;border:0}#songList{max-height:620px;overflow:auto}#songDetail .row{flex-wrap:wrap}@media(max-width:850px){.songLayout{grid-template-columns:1fr}#songList{max-height:310px}}