@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--paper:#f5f3ec;--ink:#242c2b;--muted:#72756e;--line:#deded4;--orange:#c74a29;--dark:#202d2a;--font:'DM Sans',sans-serif;--display:'Manrope',sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font);font-size:15px}button,select,input{font:inherit}button,a,select,input{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #ad592f;outline-offset:4px}button:disabled{opacity:.45;cursor:default}button{transition:background .15s,transform .15s}button:hover:not(:disabled){filter:brightness(.96)}button:active:not(:disabled){transform:translateY(1px)}[hidden]{display:none!important}.topbar{height:90px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 5%}.brand{font-family:var(--display);font-size:28px;font-weight:800;text-decoration:none;color:var(--ink);letter-spacing:-1.5px;display:flex;align-items:center;gap:9px}.brand-icon{display:inline-grid;place-items:center;background:var(--orange);width:33px;height:33px;border-radius:50%;font-size:25px;color:#fff;letter-spacing:0}.brand-dot{color:var(--orange);margin-left:-8px}.topnote,.eyebrow,.section-caption,.tone-title label{font-size:10px;letter-spacing:1.8px;font-weight:700}.topnote{color:var(--muted)}main{max-width:1340px;padding:0 40px;margin:auto}.intro{display:flex;justify-content:space-between;align-items:center;padding:52px 0 38px}.eyebrow{color:var(--orange);margin:0 0 14px}h1{font-family:var(--display);font-weight:500;font-size:clamp(32px,3.55vw,49px);line-height:1.2;letter-spacing:-2px;margin:0 0 20px}em{font-family:Georgia,serif;font-weight:400;color:var(--orange)}.lede{line-height:1.65;color:#676c65;margin:0}.intro-note{border-left:1px solid #c8cabe;padding:4px 0 4px 25px;margin-right:24px}.intro-note>span{font-size:30px;font-family:Georgia,serif;color:var(--orange)}.intro-note p{font-size:12px;line-height:1.8;color:var(--muted)}.tabs{display:flex;gap:30px;border-bottom:1px solid var(--line)}.tabs button{border:0;background:none;color:#6a706a;padding:15px 1px 18px;border-bottom:3px solid transparent;font-size:11px;display:flex;gap:10px;align-items:center}.tabs button span{font-size:15px}.tabs button.active{color:var(--orange);border-color:var(--orange)}.tabs button.active span{color:var(--ink);font-weight:700}.tonal-controls{display:flex;gap:24px;align-items:center;padding:25px 0}.tone-title label{display:block;font-size:9px;margin-bottom:7px;color:var(--muted)}select{background:transparent;border:1px solid #cdd0c7;border-radius:7px;padding:10px;color:var(--ink);max-width:100%}.tone-title select{padding:5px 23px 5px 0;border:0;font-size:15px;font-weight:700}.keys{display:grid;grid-template-columns:repeat(12,1fr);flex:1;gap:4px}.keys button{padding:12px 0;border:1px solid transparent;background:transparent;border-radius:7px;color:#575f58;min-width:38px;font-weight:600}.keys button.selected{background:var(--dark);color:white}.relative{border:1px solid #c8cdc1;border-radius:8px;background:transparent;padding:10px 14px;font-size:12px;line-height:1.5;white-space:nowrap}.relative strong{display:block}.workspace{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(270px,1fr);border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#faf9f5}.map-panel{padding:22px 28px 16px;min-width:0}.section-caption{display:flex;justify-content:space-between;align-items:center;color:#6f776e;font-size:9px;gap:10px}.switch{font-size:12px;letter-spacing:0;font-weight:400;display:flex;gap:8px;align-items:center}input[type=checkbox]{accent-color:var(--orange)}.map{position:relative;max-width:600px;aspect-ratio:600/510;margin:0 auto}.map svg{width:100%;height:100%;position:absolute}.map line{stroke:#d9ded1;stroke-width:1.4}.map line.lit{stroke:var(--orange);stroke-width:2;stroke-dasharray:5 5}.map-center{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;background:#faf9f5;border:1px solid #e4e7dc;box-shadow:0 0 0 12px #faf9f5;border-radius:50%;width:135px;height:135px;display:flex;flex-direction:column;justify-content:center}.map-center span{font-size:8px;letter-spacing:1.5px;color:var(--muted)}.map-center strong{font:500 42px var(--display);line-height:1.5;letter-spacing:-2px}.map-center small{font-size:12px;color:var(--muted)}.node{position:absolute;transform:translate(-50%,-50%);border:1px solid var(--node);width:86px;height:86px;border-radius:50%;background:var(--node-bg);color:var(--ink);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;box-shadow:0 0 0 7px #faf9f5}.node:hover:not(:disabled){transform:translate(-50%,-50%) scale(1.04)}.node:active:not(:disabled){transform:translate(-50%,-50%)}.node.selected{outline:2px solid var(--node);outline-offset:5px}.node.playing{box-shadow:0 0 0 9px #dfb9a6;outline:2px solid var(--orange)}.node .roman{font-size:10px;font-weight:700;opacity:.8}.node .symbol{font-family:var(--display);font-weight:700;font-size:27px;letter-spacing:-1px}.node .note-name{font-size:9px;max-width:82px}.node.degrees-only .symbol{font-size:33px}.map-foot{font-size:11px;line-height:1.6;color:var(--muted);margin:0;text-align:center}.inspector{background:var(--dark);color:#faf9ef;padding:28px;display:flex;flex-direction:column;align-items:stretch}.inspector .section-caption{color:#bcc9bd}.chord-hero{margin:28px 0 24px}.chord-hero h2{font:500 82px/1 var(--display);letter-spacing:-5px;margin:0}.chord-hero p{color:#c3cdbf;margin:10px 0 0}.note-chips{display:flex;gap:8px}.note-chips span{padding:10px 14px;border:1px solid #59645b;border-radius:6px;font-size:13px}.note-chips small{display:block;color:#abb9a8;font-size:9px;margin-top:4px}.function-note{border-top:1px solid #4a584e;margin:26px 0 24px;padding-top:20px;min-height:105px}.function-note>span{color:#edc284;font-size:13px;font-weight:700}.function-note p{color:#b9c6b7;font-size:13px;line-height:1.7;margin:8px 0 0}.primary,.secondary{padding:12px 17px;border-radius:7px;font-weight:500;font-size:13px;border:1px solid transparent;min-height:44px}.primary{background:var(--orange);color:white}.secondary{background:transparent;border-color:#bec6b9;color:var(--ink)}.inspector .secondary{color:#edf0e4;border-color:#657262;margin-top:9px}.text-button,.quiet{border:0;background:none;color:var(--ink);padding:9px;font-size:12px}.text-button{color:var(--orange)}.inspector .text-button{color:#c6d2bf;margin-top:12px;font-size:11px}.sequencer{padding:30px 0 20px}.sequence-head{display:flex;justify-content:space-between;align-items:center;gap:25px}.sequence-head h2,.lesson-heading h2,.training h2{font-family:var(--display);letter-spacing:-1px;font-size:26px;font-weight:500;margin:0}.preset-label{font-size:10px;color:var(--muted);display:flex;flex-direction:column;gap:7px}.preset-label select{font-size:12px}.sequence{display:flex;gap:10px;margin:22px 0;flex-wrap:wrap}.sequence-item{border:1px solid #d4d9cd;border-top:3px solid var(--node);border-radius:8px;flex:1;min-width:90px;background:#faf9f4;display:flex;align-items:center;justify-content:space-between;padding:16px;gap:10px}.sequence-item .seq-main{background:none;border:0;display:flex;flex-direction:column;align-items:flex-start;gap:7px;padding:0;color:var(--ink)}.sequence-item strong{font:700 25px var(--display)}.sequence-item small{font-size:11px;color:#6a7468}.sequence-item.playing{background:#f2dfcf;outline:2px solid var(--orange);outline-offset:1px}.remove{border:0;background:none;font-size:20px;color:#878f82;padding:6px}.transport{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.loop{font-size:12px;display:flex;align-items:center;gap:4px;margin:0 10px}.tempo{display:flex;align-items:center;gap:8px;font-size:11px;flex:1;justify-content:flex-end}.tempo input{width:100px;accent-color:var(--orange)}.tempo output{width:95px}.compare-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-top:20px;border-top:1px solid var(--line);padding:13px 0}.compare-head p{font-size:12px;color:var(--muted)}.compare-head strong{font-weight:500;color:var(--ink)}#comparison{overflow-x:auto}.comparison-table{border-collapse:collapse;min-width:100%;font-size:13px}.comparison-table th,.comparison-table td{padding:13px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}.comparison-table th{font-size:11px;color:var(--muted)}.comparison-table tr:first-child{background:#e9eade}.lesson-heading{padding:30px 0}.lesson-heading h2{line-height:1.5}.lesson-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.lesson{border:1px solid var(--line);border-radius:12px;padding:26px;background:#faf9f5}.step{font-family:Georgia,serif;font-size:35px;color:#c7b69e}.lesson h3{font-family:var(--display);font-size:22px;letter-spacing:-.5px;font-weight:600;margin:15px 0}.lesson p,.practice-note p{color:#656d63;font-size:14px;line-height:1.8}.lesson label{font-size:12px;margin-right:10px}.small{font-size:12px!important;line-height:1.7;color:var(--muted)}.scale-row{display:flex;gap:5px;margin:24px 0;align-items:center;flex-wrap:wrap}.scale-note{border:1px solid #cad1bf;border-radius:6px;min-width:39px;padding:12px 8px;text-align:center;font-weight:600;font-size:13px;background:transparent;color:var(--ink)}.scale-note.chosen{background:#e6c99c;border-color:#ad8052}.scale-note small{display:block;font-size:9px;font-weight:400;color:#68705f;margin-top:7px}.build-result{margin:22px 0;font-size:23px;font-family:var(--display);color:var(--orange)}.quality-row{display:flex;gap:7px;flex-wrap:wrap}.quality-row span{border:1px solid #d3d7cb;padding:10px;border-radius:6px;min-width:43px;text-align:center}.quality-row small{display:block;font-size:9px;color:var(--muted);margin-top:7px}.practice-note{background:#e8eadf;border-radius:12px;padding:26px;margin-top:20px}.sources{font-size:11px;line-height:1.8;color:var(--muted);margin:25px 0}.sources a{color:var(--ink)}.training{display:grid;grid-template-columns:1fr 1.3fr;gap:70px;padding:45px 0}.training h2{font-size:36px;line-height:1.35;margin:20px 0}.training-copy>p{line-height:1.8;color:#66705f}.training-copy label{font-size:11px;display:block;margin:25px 0 8px}.training-copy select{width:100%;max-width:350px}.score{font-size:13px;margin-top:30px;font-weight:500}.challenge{background:var(--dark);border-radius:16px;padding:36px;text-align:center;color:#eef0e7}.sound-glyph{height:90px;display:flex;align-items:center;justify-content:center;gap:8px}.sound-glyph i{width:5px;height:35%;background:#d5ae76;border-radius:5px}.sound-glyph i:nth-child(2n){height:60%}.sound-glyph i:nth-child(4){height:90%}.sound-glyph.active i{animation:pulse .6s infinite alternate}.sound-glyph.active i:nth-child(2n){animation-delay:.25s}@keyframes pulse{to{transform:scaleY(.4)}}#challenge-status{font-size:11px;color:#c3ccb9}#challenge-title{font-weight:500;font-size:21px;margin:18px 0 25px}.challenge-actions{display:flex;justify-content:center;gap:9px;flex-wrap:wrap}.challenge .secondary{color:#e7ebdd}.answers{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:26px 0}.answers button{color:#e6eddb;border:1px solid #708265;border-radius:9px;min-width:55px;padding:12px;background:none;font-size:20px}.answers button small{display:block;font-size:9px;margin-top:5px;color:#c1cbb5}.answers button.correct{background:#4b6b43}.answers button.wrong{background:#7c4536}.challenge #feedback{font-size:13px;line-height:1.7;min-height:65px;color:#c3cdb7}.challenge .text-button{color:#edc284}.notice{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#27352c;color:white;border-radius:8px;padding:12px 20px;z-index:5;font-size:13px;max-width:90vw;display:none}.notice.show{display:block}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:20px;padding:30px 0;color:var(--muted);font-size:11px;margin-top:25px}footer .brand{font-size:20px}footer>span:last-child{font-size:8px;letter-spacing:1px}
@media(min-width:1400px){main{max-width:1300px}}@media(max-width:1000px){main{padding:0 25px}.tonal-controls{gap:13px;flex-wrap:wrap}.keys{order:3;flex-basis:100%}.relative{margin-left:auto}.map-panel{padding:20px 15px}.node{width:73px;height:73px}.node .symbol{font-size:24px}.map-center{width:110px;height:110px}.map-center strong{font-size:32px}.inspector{padding:24px}.intro-note{margin-right:0}.training{gap:30px}.tempo{justify-content:flex-start;flex-basis:200px}}@media(max-width:700px){.topbar{height:72px;padding:0 20px}.topnote{display:none}.brand{font-size:25px}main{padding:0 18px}.intro{padding:32px 0 24px}.intro-note{display:none}h1{font-size:32px;letter-spacing:-1.3px}.lede{font-size:13px}.eyebrow{font-size:9px}.tabs{gap:23px}.tabs button{gap:6px}.tabs button span{font-size:13px}.tabs button{font-size:9px}.tonal-controls{padding:18px 0;gap:10px}.keys{grid-template-columns:repeat(6,1fr);gap:3px}.keys button{padding:10px}.workspace{grid-template-columns:1fr}.map-panel{padding:18px 12px}.map{margin-top:10px;max-width:500px}.map-center{width:100px;height:100px}.map-center span{font-size:7px}.map-center strong{font-size:30px}.node{width:66px;height:66px;box-shadow:0 0 0 4px #faf9f5}.node .symbol{font-size:22px}.node .note-name{font-size:8px}.node .roman{font-size:9px}.node.selected{outline-offset:3px}.map-foot{font-size:10px;margin:15px 0 4px}.inspector{padding:24px}.chord-hero{margin:20px 0;display:flex;align-items:center;gap:20px}.chord-hero h2{font-size:60px}.chord-hero p{margin:0}.function-note{min-height:0;margin:20px 0}.sequence-head{align-items:flex-start;flex-direction:column;gap:18px}.preset-label,.preset-label select{width:100%}.sequence{gap:7px}.sequence-item{min-width:calc(50% - 7px);padding:13px}.sequence-head h2{font-size:24px}.transport{gap:8px}.transport>.primary{flex:1}.transport>.secondary{flex:0}.tempo{flex-basis:100%;padding:8px 0}.tempo input{flex:1}.transport .quiet{margin-left:auto}.compare-head{align-items:flex-start;flex-direction:column;gap:0}.compare-head .text-button{padding-left:0}.lesson-grid{grid-template-columns:1fr}.lesson-heading h2{font-size:24px}.lesson{padding:22px}.training{grid-template-columns:1fr;gap:25px;padding:20px 0}.training h2{font-size:31px}.challenge{padding:26px 20px}.training-copy .small{margin-bottom:0}.score{margin-top:20px}.sources{font-size:10px}footer{align-items:flex-start;flex-wrap:wrap;padding:25px 0;gap:15px}footer>span:last-child{width:100%}.desktop{display:none}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}