:root{--paper:#f4f3ec;--ink:#1a2925;--muted:#57635b;--line:#d9ddd3;--green:#244f3c;--lime:#d6f47a;--white:#fff;--orange:#eb9d57;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:4px}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button,select{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:3px solid #426b18;outline-offset:4px}button:disabled{cursor:default;opacity:.5}.wrap{max-width:1180px;margin:auto;padding:0 30px}.skip{position:absolute;top:-80px}.skip:focus{top:8px;background:white;padding:15px;z-index:100}.site-header{border-bottom:1px solid var(--line)}.header-row{display:flex;align-items:center;gap:28px;min-height:88px}.brand{display:flex;gap:11px;align-items:center;text-decoration:none;font-size:18px;font-weight:800;letter-spacing:-.6px;margin-right:auto}.brand-mark{width:34px;height:34px;background:var(--green);color:var(--lime);display:grid;place-items:center;border-radius:8px;font-family:monospace;font-size:20px}.site-nav{display:flex;align-items:center;gap:25px;font-size:13px}.site-nav a{text-decoration:none}.locale{border:1px solid #bdc6b9;border-radius:20px;padding:8px 12px}.eyebrow{font-family:monospace;text-transform:uppercase;font-size:11px;letter-spacing:1.7px;color:var(--green);display:flex;align-items:center;gap:9px}.dot{width:7px;height:7px;background:#4a782f;border-radius:50%;display:inline-block}.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:65px;align-items:center;padding:65px 0 50px}.hero h1{font-size:clamp(40px,5vw,66px);line-height:1.03;letter-spacing:-3.2px;margin:23px 0}.hero h1 em{font-family:Georgia,serif;font-weight:400;font-style:italic;color:var(--green)}.lede{font-size:17px;line-height:1.65;color:var(--muted);max-width:540px}.button{background:var(--green);color:white;padding:14px 20px;border:1px solid var(--green);border-radius:5px;display:inline-flex;align-items:center;justify-content:center;gap:22px;text-decoration:none;font-weight:600;font-size:13px}.button.secondary{background:transparent;color:var(--ink);border-color:#aebbae}.button.small{padding:10px 14px}.hero-actions,.toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.hero-actions{margin:25px 0}.micro{font-size:11px;color:var(--muted);line-height:1.6}.hero-visual{background:var(--green);color:#fff;padding:24px;border-radius:13px;position:relative;box-shadow:0 15px 35px #244f3c12}.visual-head{display:flex;align-items:center;justify-content:space-between;font:10px monospace;letter-spacing:1px;color:#d0e0d4}.visual-keyboard{display:grid;grid-template-columns:repeat(10,1fr);gap:5px;margin:27px 0 18px}.visual-keyboard span{background:#42624e;border:1px solid #78917c;border-radius:4px;display:grid;place-items:center;aspect-ratio:1.1;font:11px monospace;color:#e3ede0}.visual-keyboard .lit{background:var(--lime);color:#193022;border-color:var(--lime)}.visual-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #71907d;padding-top:18px;font-size:12px}.visual-bottom strong{color:var(--lime);font:24px monospace}.illustration-label{font:10px monospace;color:#c4d3c8;margin-top:18px}.benefits{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:20px 0;font-size:12px}.benefits span:before{content:'✓';margin-right:9px;color:var(--green)}.section{padding:46px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:25px}.section-heading h2{font-size:30px;letter-spacing:-1.2px;margin:8px 0}.section-heading p{font-size:13px;color:var(--muted);max-width:350px;line-height:1.6}.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.card{display:flex;flex-direction:column;position:relative;min-height:216px;padding:23px;border:1px solid #cfd6ca;border-radius:7px;background:#fafaf6;text-decoration:none;transition:background .15s,transform .15s}.card:hover{background:#e8eddc;transform:translateY(-3px)}.card .symbol{font-size:27px;color:var(--green);font-family:monospace}.card h3{font-size:17px;margin:23px 0 8px;letter-spacing:-.3px}.card p{font-size:12px;line-height:1.6;color:var(--muted);margin:0 0 18px}.card .arrow{margin-top:auto;font:11px monospace;color:var(--green)}.feature-strip{background:#e6ebdd;border:1px solid #d1d9c9;border-radius:7px;display:grid;grid-template-columns:1.1fr 1fr;gap:50px;padding:32px}.feature-strip h2{font-size:29px;letter-spacing:-1px;margin:10px 0}.feature-strip p{line-height:1.6;color:var(--muted);font-size:14px}.step-list{list-style:none;padding:0;margin:0;display:grid;gap:17px;counter-reset:step}.step-list li{display:flex;align-items:center;gap:15px;font-size:13px}.step-list li:before{counter-increment:step;content:'0' counter(step);font:11px monospace;color:var(--green);background:white;border-radius:50%;padding:11px}.guide-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.guide-list a{border-top:1px solid #bbc8b6;padding:19px 0;line-height:1.5;font-weight:600;text-decoration:none;font-size:15px}.guide-list a span{display:block;font:10px monospace;color:var(--muted);margin-bottom:10px}.site-footer{border-top:1px solid var(--line);padding:27px 0 35px;font-size:11px;color:var(--muted);margin-top:32px}.footer-row{display:flex;align-items:center;gap:22px;flex-wrap:wrap}.footer-row .brand{font-size:15px;color:var(--ink)}.breadcrumb{padding-top:24px;font:11px monospace;color:var(--muted)}.page-intro{padding:33px 0 25px;max-width:850px}.page-intro h1{font-size:44px;letter-spacing:-1.9px;line-height:1.12;margin:14px 0}.tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:24px;align-items:start}.tool-panel{background:#fff;border:1px solid #cdd6c7;border-radius:8px;overflow:hidden}.panel-head{background:#edf1e6;border-bottom:1px solid #d1d9c9;padding:16px 22px;display:flex;align-items:center;justify-content:space-between;font:10px monospace;text-transform:uppercase;letter-spacing:1px}.tool-body{padding:22px}.tool-status{min-height:20px;line-height:1.5;font:12px monospace;margin:15px 0;color:var(--green)}.note{border:1px solid #d3dacb;background:#eaf0e2;border-radius:6px;padding:22px;font-size:12px;line-height:1.7}.note h2{font-size:16px;margin-top:0}.note ol{padding-left:18px}.note a{display:block;margin-top:15px}.keyboard{overflow:auto;margin:22px 0 13px;padding:4px 2px}.key-row{display:flex;gap:4px;margin:4px 0;min-width:570px}.key{flex:1;height:38px;min-width:25px;background:#f2f4ed;color:#364d3c;border:1px solid #c6d0c0;border-bottom-width:3px;border-radius:4px;display:flex;align-items:center;justify-content:center;font:10px monospace;white-space:nowrap}.key.seen{background:#e0edb8;border-color:#9bba75}.key.held{background:var(--green);color:var(--lime);border-color:var(--green)}.key.wide{flex:1.8}.key.space{flex:5}.keyboard .key[data-code=Backslash]{flex:1.5}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:18px 0}.metric{padding:15px;border:1px solid #d5ddce;background:#fafbf7;border-radius:5px;font-size:11px;color:var(--muted)}.metric strong{display:block;font:24px monospace;color:var(--green);margin-bottom:7px}.event-detail{font:12px monospace;background:#eef1e7;padding:12px;border-radius:4px;overflow-wrap:anywhere}.test-zone{width:100%;min-height:180px;border:2px dashed #91a182;border-radius:7px;background:#f3f6eb;color:var(--green);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:12px;padding:25px;user-select:none;overflow:hidden}.test-zone.active{background:#d6f47a}.test-zone .zone-title{font-size:22px;font-weight:700;line-height:1.4}.test-zone:focus{outline:3px solid #6c972b;outline-offset:3px}.log{height:110px;overflow:auto;font:11px/1.8 monospace;white-space:pre-wrap;background:#f6f7f2;padding:12px;margin:12px 0}.axis-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:20px 0}.axis{position:relative;width:155px;height:155px;max-width:100%;border:1px solid #a8b89c;border-radius:50%;margin:auto;background:linear-gradient(transparent 49.5%,#c9d2c0 49.5%,#c9d2c0 50.5%,transparent 50.5%),linear-gradient(90deg,transparent 49.5%,#c9d2c0 49.5%,#c9d2c0 50.5%,transparent 50.5%)}.axis-dot{width:13px;height:13px;border-radius:50%;background:var(--green);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.axis-caption{text-align:center;font:11px monospace;margin-top:10px}.pad-buttons{display:flex;gap:5px;flex-wrap:wrap;margin:20px 0}.pad-btn{font:10px monospace;border:1px solid #c4cfb8;padding:7px;border-radius:4px}.pad-btn.on{background:var(--green);color:var(--lime)}.screen-preview{height:250px;background:white;border:1px solid #a9b79e;position:relative;display:flex;justify-content:center;align-items:center;flex-direction:column;gap:20px;border-radius:5px}.screen-preview.dark{background:#000;color:#fff}.screen-controls{background:#f3f4ec;padding:10px;border-radius:6px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;color:#1a2925}.screen-controls button{border:1px solid #bbc9b0;background:white;padding:8px 11px;border-radius:4px}.screen-controls button[aria-pressed=true]{outline:2px solid #244f3c;outline-offset:1px}.screen-preview:fullscreen{height:100%;width:100%;border:0;border-radius:0;cursor:default}.screen-preview:fullscreen .screen-controls{position:absolute;top:18px;left:18px;max-width:90vw;opacity:.8}.screen-preview.hide-controls:fullscreen .screen-controls,.screen-preview.hide-controls:fullscreen .screen-hint{opacity:0;pointer-events:none}.screen-hint{font:11px monospace;background:#f3f4ec;color:#1a2925;padding:6px;border-radius:3px}.article-layout{display:grid;grid-template-columns:minmax(0,760px) 270px;gap:50px;margin:40px 0}.prose{font-size:15px;line-height:1.85}.prose h2{font-size:25px;letter-spacing:-.6px;line-height:1.3;margin:35px 0 14px}.prose h3{font-size:17px;margin-top:27px}.prose p{margin:0 0 18px}.prose li{margin:10px 0}.prose .source-links{font-size:12px}.prose details{border-top:1px solid var(--line);padding:15px 0}.prose summary{cursor:pointer;font-weight:600}.related{margin-top:30px}.related .cards{grid-template-columns:repeat(3,1fr)}.related .card{min-height:150px}.related .card h3{margin-top:10px}.checklist{list-style:none;padding:0}.checklist label{display:flex;align-items:start;gap:12px;border:1px solid #ced7c3;border-radius:5px;padding:16px;margin-bottom:12px;background:#fafbf7}.checklist input{width:20px;height:20px;flex-shrink:0}.checklist small{display:block;color:var(--muted);font-size:12px}.checklist label:has(input:checked){background:#e0edb8}.legal-table{width:100%;border-collapse:collapse}.legal-table td,.legal-table th{padding:12px;border-bottom:1px solid var(--line);text-align:left;font-size:13px}.validation-banner{padding:7px;text-align:center;background:#e8ecdf;font:10px monospace;color:#4b6246}.empty-hint{color:var(--muted);font-size:12px}select,input[type=number]{border:1px solid #aebda1;background:white;border-radius:4px;padding:9px;max-width:100%}label.field{display:flex;align-items:center;gap:8px;font-size:12px;flex-wrap:wrap}.not-supported{color:#8d351d}.demo-badge{color:var(--lime);border:1px solid #65816b;border-radius:20px;padding:5px 8px}
@media(max-width:1000px){.hero{gap:30px}.cards{grid-template-columns:repeat(2,1fr)}.tool-layout{grid-template-columns:minmax(0,1fr)}.tool-layout>aside{display:none}.article-layout{grid-template-columns:minmax(0,1fr)}.article-layout aside{order:-1}.hero h1{letter-spacing:-2px}.site-nav{gap:15px}.wrap{padding:0 24px}}@media(max-width:650px){.wrap{padding:0 18px}.header-row{min-height:75px;gap:12px}.site-nav{font-size:11px;gap:13px}.site-nav .method-link{display:none}.brand{font-size:15px;letter-spacing:-.4px}.brand-mark{height:28px;width:28px;font-size:16px}.hero{grid-template-columns:1fr;padding:35px 0;gap:24px}.hero h1{font-size:47px;margin:17px 0}.hero-visual{padding:20px}.benefits{font-size:11px;gap:13px}.benefits span{width:45%}.section{padding:32px 0}.section-heading{display:block}.section-heading h2{font-size:28px}.cards{gap:10px}.card{padding:17px;min-height:205px}.card h3{font-size:15px}.card p{font-size:11px}.feature-strip{display:block;padding:24px}.step-list{margin-top:24px}.guide-list{grid-template-columns:1fr}.guide-list a{padding:14px 0}.page-intro h1{font-size:35px}.page-intro .lede{font-size:15px}.tool-body{padding:16px}.metrics{gap:6px}.metric{padding:10px;font-size:10px}.metric strong{font-size:22px}.related .cards{grid-template-columns:1fr}.screen-controls{gap:5px}.screen-controls button{font-size:10px;padding:7px}.axis{width:120px;height:120px}.footer-row{gap:17px}.footer-row .brand{width:100%;margin-bottom:5px}.prose{font-size:14px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.site-header,.site-footer,.validation-banner,.hero-visual,.toolbar,.screen-preview,.related{display:none}.wrap{max-width:100%;padding:0}.article-layout{display:block}.prose{font-size:11pt}.checklist label{break-inside:avoid}a{text-decoration:none}}

/* Lab 02: a cohesive workspace, with no external fonts or animation library. */
.language-menu{position:relative;font-size:12px}.language-menu summary{border:1px solid #bdc6b9;border-radius:20px;padding:8px 12px;cursor:pointer;list-style:none;white-space:nowrap}.language-menu summary::-webkit-details-marker{display:none}.language-menu>div{position:absolute;right:0;top:calc(100% + 8px);min-width:145px;display:grid;padding:7px;background:#fff;border:1px solid #d1dac8;border-radius:9px;box-shadow:0 10px 30px #183e3022;z-index:40}.language-menu a{padding:10px;border-radius:5px;white-space:nowrap}.language-menu a[aria-current=page]{background:#e5eed7;font-weight:700}.site-nav{flex-wrap:wrap}.instrument-heading{font-size:17px;letter-spacing:-.3px;line-height:1.5;margin:24px 0 10px}.intent-table{border-collapse:collapse;width:100%;font-size:12px;line-height:1.7;min-width:680px}.intent-table th,.intent-table td{vertical-align:top;text-align:left;padding:18px;border-bottom:1px solid #d5ddcd}.intent-table thead{background:#e7efdc}.intent-table th:first-child{min-width:145px}.intent-table td:nth-child(2){min-width:200px;color:var(--green)}.intent-table td:last-child{color:var(--muted)}.intent-table tbody tr:nth-child(even){background:#ffffff70}.language-menu summary:focus-visible{outline:3px solid #426b18;outline-offset:3px}
.guide-toc{padding:20px;background:#e9efdf;border:1px solid #cbd8bd;border-radius:9px;font-size:12px;display:grid;gap:8px}.guide-toc strong{margin-bottom:5px}.guide-toc a{line-height:1.6;text-decoration:none}.guide-toc a:hover{text-decoration:underline}.guide-toc span{font-family:monospace;color:var(--green);margin-right:8px}.prose section{scroll-margin-top:20px}
[hidden]{display:none!important}
textarea{font:inherit;resize:vertical}
:root{--paper:#f5f5ed;--line:#d9dfd1}
body{background:radial-gradient(ellipse at 0 0,#e7edda70,transparent 700px),var(--paper)}
.site-header{background:#f5f5edf2}
.header-row{min-height:84px}.site-nav a:hover{color:var(--green);text-decoration:underline}
.lab-nav{display:flex;align-items:center;gap:7px;font-weight:700}
[data-saved-count]:not(:empty){display:inline-grid;place-items:center;background:var(--green);color:var(--lime);border-radius:50%;min-width:20px;height:20px;font:10px monospace}
.hero-v2{padding:65px 0 50px;gap:55px;grid-template-columns:1.08fr 1fr}
.hero-v2 h1{font-size:clamp(46px,5.5vw,73px);line-height:1.02;letter-spacing:-3.5px}
.hero-v2 .lede{max-width:470px}.button{border-radius:7px;min-height:42px;transition:background .15s,transform .15s}
.button:hover:not(:disabled){background:#326448;color:white;transform:translateY(-1px)}
.hero-facts{display:flex;gap:28px;margin-top:32px}
.hero-facts span{display:grid;gap:6px;font-size:11px;color:var(--muted)}
.hero-facts strong{font:27px monospace;color:var(--green);letter-spacing:-1px}
.lab-visual{background:radial-gradient(ellipse at 90% 0,#386247,transparent 85%),#183e30;border:1px solid #4c6c4c;border-radius:18px;padding:22px;box-shadow:0 23px 45px #244f3c1c;transform:rotate(1deg)}
.lab-visual .visual-head{margin-bottom:20px}.visual-instrument{background:#ffffff07;border:1px solid #ffffff24;border-radius:9px;padding:12px 15px}
.instrument-label{font:9px monospace;letter-spacing:1px;color:#cfddc6;display:flex;justify-content:space-between}
.lab-visual .visual-keyboard{margin:15px 0 3px;gap:5px}.lab-visual .visual-keyboard span{min-height:22px;background:#385b46;border-color:#67826b}
.lab-visual .visual-keyboard .lit{background:var(--lime);color:#193022;border-color:var(--lime)}
.instrument-pair{display:grid;grid-template-columns:1fr 1fr;gap:11px;margin:11px 0 20px}
.orbit{width:77px;height:77px;border:1px solid #95a98b;border-radius:50%;position:relative;margin:12px auto 0;background:linear-gradient(transparent 49%,#ffffff30 49% 50%,transparent 50%),linear-gradient(90deg,transparent 49%,#ffffff30 49% 50%,transparent 50%)}
.orbit:after{content:'';position:absolute;inset:14px;border:1px dashed #a8bc8a70;border-radius:50%}.orbit i{position:absolute;width:9px;height:9px;background:var(--lime);border-radius:50%;left:53%;top:37%}
.mini-spectrum{height:77px;border-radius:5px;margin:12px 0 0;background:linear-gradient(90deg,#151c16,#6d8464,#d9e5c6,#fff);position:relative;overflow:hidden}
.mini-spectrum:after{content:'';position:absolute;inset:0;background:repeating-linear-gradient(90deg,transparent 0 23px,#183e3066 23px 24px)}
.benefits{margin-top:0}.section-heading h2{font-size:33px;line-height:1.18;letter-spacing:-1.3px}
.catalog-filters{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 20px}
.filter-chip{border:1px solid #c2cfb9;background:transparent;border-radius:30px;padding:10px 17px;color:var(--muted);font-size:12px}
.filter-chip[aria-pressed=true]{background:var(--green);color:var(--lime);border-color:var(--green)}
.card{border-radius:10px;min-height:234px;background:#ffffff80;padding:22px;transition:transform .15s,box-shadow .15s,background .15s}
.card:hover{box-shadow:0 10px 22px #244f3c0d;background:#fff}
.card-top{display:flex;justify-content:space-between;gap:10px;align-items:center}
.card-type{font:9px monospace;letter-spacing:.4px;text-transform:uppercase;color:#627559;background:#eaf0e1;padding:6px 8px;border-radius:4px}
.card h3{margin-top:21px}.card .symbol{font-size:26px}.card .arrow{border-top:1px solid #dde4d5;padding-top:13px;width:100%}
.lab-feature{display:grid;grid-template-columns:1fr 1fr;gap:60px;background:#173e2e;color:#fff;padding:42px;border-radius:14px;margin:5px 0 10px;position:relative;overflow:hidden}
.lab-feature .eyebrow{color:var(--lime)}.lab-feature h2{font-size:35px;line-height:1.18;letter-spacing:-1.4px;margin:17px 0}.lab-feature p{font-size:14px;line-height:1.75;color:#cbd9c8}
.lab-feature .button{background:var(--lime);color:#183b2b;border-color:var(--lime);margin-top:10px}
.comparison-illustration{background:#ffffff08;border:1px solid #ffffff2b;padding:23px;border-radius:10px;align-self:center}
.compare-label{font:10px monospace;color:#bacdb6;letter-spacing:1px;margin-bottom:20px}
.comparison-illustration>div:not(.compare-label):not(.recipe-connector){display:flex;gap:16px;align-items:center;font-size:14px}
.recipe-letter{font:23px monospace;border:1px solid #74905f;color:var(--lime);width:47px;height:47px;display:grid;place-items:center;border-radius:7px;flex-shrink:0}
.comparison-illustration small{display:block;color:#bdceb7;font-size:10px;margin-top:6px}
.recipe-connector{color:#a8be98;font:10px monospace;padding:16px 0 16px 20px}
.comparison-illustration>p{font-size:11px;margin:20px 0 0;border-top:1px solid #ffffff20;padding-top:14px}
.symptom-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 30px}
.symptom-grid>a{display:flex;align-items:center;gap:18px;padding:21px 0;border-top:1px solid #c6d2bd;text-decoration:none;font-size:16px;font-weight:600}
.symptom-grid>a:hover b{transform:translate(3px,-3px)}.symptom-grid b{font-size:21px;color:var(--green);margin-left:auto;transition:transform .15s}
.symptom-index{font:11px monospace;color:#69815a}.symptom-grid small{display:block;font-size:11px;font-weight:400;color:var(--muted);line-height:1.6;margin-top:6px}.text-link{font-size:12px;color:var(--green)}
.tool-switcher{display:flex;gap:8px;flex-wrap:wrap;padding:0 0 22px;font-size:11px}
.tool-switcher a{padding:8px 11px;border:1px solid #cad4c1;border-radius:20px;text-decoration:none}
.tool-switcher a[aria-current=page]{background:var(--green);color:white;border-color:var(--green)}
.tool-panel{border-radius:12px;box-shadow:0 8px 22px #244f3c06}.note{border-radius:10px}.note h2{line-height:1.35}
.analysis-card{background:#f6f8f1;border:1px solid #d8e1cf;border-radius:8px;padding:16px;margin-top:18px}
.analysis-card h3{font-size:13px;margin:0 0 12px}.analysis-heading{display:flex;justify-content:space-between;gap:10px;align-items:baseline}.live-label{font:8px monospace;color:var(--green);white-space:nowrap}
.chord-view{font:14px/1.6 monospace;color:var(--green);min-height:23px;overflow-wrap:anywhere}.key.seen{box-shadow:inset 0 0 0 100px rgb(115 163 24 / calc(var(--key-count,0) * .035))}.key.held{box-shadow:none}
#event-chart{display:block;width:100%;height:auto;max-height:170px;margin:12px 0 4px;background:linear-gradient(#edf2e5 1px,transparent 1px) 0 13px/100% 25px}
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.operator-details dt{font-weight:700;margin-top:16px}.operator-details dd{margin:5px 0 0;overflow-wrap:anywhere}
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