@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--bg:#f5f5ef;--ink:#233e35;--muted:#7b8278;--lime:#d3f17b;--line:#dfe3d8}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Manrope,Arial,sans-serif;font-size:14px}button,select{font:inherit;cursor:pointer}button{color:inherit}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #689e28;outline-offset:4px}header{height:88px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:30px;padding:0 5%}.logo{text-decoration:none;color:var(--ink);font-size:32px;font-weight:800;letter-spacing:-2px}.logo>span:first-child{display:inline-flex;align-items:center;justify-content:center;background:var(--ink);color:var(--lime);width:35px;height:35px;border-radius:50%;font-size:29px;margin-right:10px}.logo-dot{color:#84a147}.tagline{color:var(--muted);font-size:12px}.header-right{margin-left:auto;font-size:11px;letter-spacing:2px}.header-right i{color:#9cbf5c;margin-left:12px}main{max-width:1440px;margin:auto;padding:0 5%}.intro{display:flex;align-items:center;justify-content:space-between;margin:51px 0 38px;gap:25px}.eyebrow{font-size:10px;letter-spacing:1.5px;font-weight:800;color:#7a8676}h1{font-size:clamp(32px,4vw,54px);letter-spacing:-2px;margin:12px 0}h1 span{color:#89a94e}p{line-height:1.8;color:var(--muted)}.intro p{margin:0;font-size:15px}.progress-card{min-width:207px;border:1px solid var(--line);padding:20px 23px;border-radius:14px}.progress-card>span{font-size:9px;letter-spacing:1.5px}.progress-card strong{display:block;font-size:30px;margin:8px 0}.progress-card small{font-size:12px;font-weight:500;color:var(--muted)}.progress-track{height:4px;background:#e1e7d6;border-radius:5px}#progress-fill{height:100%;background:#91b54d;transition:width .3s}nav{display:flex;border-bottom:1px solid var(--line);margin-bottom:25px;gap:33px}nav button{border:0;background:none;padding:15px 0 18px;color:#8b9388;font-size:11px;border-bottom:3px solid transparent}nav b{font-size:14px;margin-left:9px}nav .active{border-color:var(--ink);color:var(--ink)}.workspace{background:white;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 5px 15px #233e3503}.workspace-head{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:28px}h2{font-size:22px;letter-spacing:-.7px;margin:8px 0 0}.controls{display:flex;gap:10px;align-items:center;font-size:12px}.controls select,.small-button{background:#f6f7f2;border:1px solid var(--line);border-radius:7px;padding:10px}.sound{display:flex;align-items:center;gap:5px;margin-right:8px}input{accent-color:var(--ink)}.fret-scroll{overflow:auto;padding:8px 1px}#fretboard{min-width:850px;display:grid;grid-template-columns:62px repeat(12,1fr);background:linear-gradient(0deg,#ebeadd,#f5f3e8);border-radius:9px;padding-bottom:13px;position:relative}.fret-number{background:white;text-align:center;padding:0 0 16px;color:#9a9e94;font-size:10px}.fret-number.marker{color:#475e4a;font-weight:800}.fret-cell{height:67px;position:relative;display:flex;justify-content:center;align-items:center;border-right:2px solid #c9c9b9}.fret-cell:before{content:'';position:absolute;left:0;right:0;height:var(--string-width);background:linear-gradient(#adb1a3,#d6d7c8,#9fa494);box-shadow:0 2px 2px #233e3514}.fret-cell.open{background:#e5e8dc;border-right:5px solid #8b9583}.note{position:relative;z-index:1;border:1px solid #d3d8c8;min-width:43px;height:43px;border-radius:50%;background:#fafbf5;color:#4b6050;display:flex;flex-direction:column;align-items:center;justify-content:center;transition:transform .15s,background .15s}.note b{font-size:13px}.note small{font-size:9px;margin-top:1px}.note.accidental{background:#eeeee5;color:#8a9185}.note.selected,.note.highlight{background:var(--lime);border-color:#b2ce6d;color:#2e4834;box-shadow:0 0 0 3px #d3f17b33}.note:hover{transform:translateY(-3px);border-color:#8fa568}.note.dim{opacity:.25}.note.correct{background:var(--lime)}.note.wrong{background:#f4b7a2}.board-footer{display:flex;justify-content:space-between;margin:15px 0 20px;color:#899280;font-size:10px}.divider{padding:0 10px;color:#c6cdbd}#feedback{background:#f3f6ed;border-radius:8px;padding:14px 17px;color:#617257;font-size:12px;min-height:45px}.bottom-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:22px;margin:24px 0 44px}.note-card,.tip-card{border:1px solid var(--line);border-radius:16px;padding:26px}h3{font-size:20px;letter-spacing:-.5px;margin:10px 0 18px}#alphabet{display:flex;gap:8px}#alphabet button{background:white;border:1px solid var(--line);border-radius:9px;padding:10px 0;flex:1;display:flex;flex-direction:column;align-items:center;gap:5px}#alphabet b{font-size:18px}#alphabet span{font-size:10px;color:var(--muted)}#alphabet .active{background:var(--lime);border-color:#bed782}.note-card p{font-size:11px;margin-bottom:0}.tip-card{background:#e8eddf;position:relative;overflow:hidden}.tip-card h3{font-size:24px;line-height:1.45}.tip-card p{max-width:350px;font-size:12px}.tip-icon{position:absolute;right:27px;top:35px;font-size:58px;color:#9daf83}.tip-card button{border:0;border-bottom:1px solid #9eac8d;padding:0 0 8px;background:none;font-weight:700;font-size:12px}.tip-card button span{margin-left:25px}.section-title{display:flex;align-items:end;justify-content:space-between;margin-bottom:22px}.section-title>span{font-size:11px;color:var(--muted)}#lessons{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.lesson-card{text-align:left;border:1px solid var(--line);background:transparent;padding:21px;border-radius:12px;display:flex;gap:16px}.lesson-card:hover,.lesson-card.current{background:white;border-color:#9bac8e}.lesson-card .number{font-size:12px;color:#869777;border:1px solid #cfd9c4;border-radius:50%;width:29px;height:29px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.lesson-card b{display:block;font-size:13px}.lesson-card small{display:block;font-size:10px;color:var(--muted);margin-top:8px}.lesson-card.done .number{background:var(--lime);border-color:var(--lime)}footer{display:flex;align-items:center;gap:25px;padding:38px 0;margin-top:25px;border-top:1px solid var(--line);color:var(--muted);font-size:10px}footer .logo{font-size:24px}footer span:last-child{margin-left:auto}#lesson-info,#quiz-info{padding:18px 20px;background:#f5f7ef;border-radius:10px;margin-bottom:16px;line-height:1.8}#lesson-info p{margin:6px 0;font-size:13px}#lesson-actions{display:flex;justify-content:space-between;margin-top:18px;gap:12px}#lesson-actions[hidden]{display:none}.primary{background:var(--ink);color:white;border:0;padding:12px 20px;border-radius:8px}.secondary{background:white;border:1px solid var(--line);padding:12px 20px;border-radius:8px}.quiz-top{display:flex;justify-content:space-between;align-items:center}.quiz-target{font-size:24px;font-weight:800}.quiz-meta{font-size:12px;color:var(--muted)}@media(max-width:760px){header{height:70px}.tagline{display:none}.intro{margin:30px 0;align-items:start}.progress-card{min-width:120px;padding:13px}.progress-card strong{font-size:23px}.progress-card small{display:block}h1{letter-spacing:-1.2px}.intro p{font-size:12px}.intro .eyebrow{font-size:8px}nav{gap:18px}nav button{font-size:9px}nav b{font-size:11px;margin-left:3px}.workspace{padding:16px}.workspace-head{align-items:start;flex-direction:column}.controls{flex-wrap:wrap}.bottom-grid{grid-template-columns:1fr}.board-footer{gap:15px;font-size:8px}#lessons{grid-template-columns:1fr 1fr}.lesson-card{padding:14px;gap:9px}.section-title>span{display:none}footer{gap:15px;flex-wrap:wrap}footer span:last-child{margin-left:0}.tip-icon{font-size:40px}h2{font-size:19px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}

.controls{flex-wrap:wrap;justify-content:flex-end}.workspace-head>div:first-child{flex-shrink:0}@media(max-width:1000px){.workspace-head{align-items:flex-start;flex-direction:column}.controls{justify-content:flex-start}}

.quiz-stage{margin-bottom:10px;letter-spacing:1px;font-weight:800}.quiz-progress{width:100%;height:7px;margin:15px 0 8px;accent-color:#91b54d}.quiz-top{gap:15px}.quiz-top>span{flex-shrink:0}

#brain-info{padding:18px 20px;background:#f5f7ef;border-radius:10px;margin-bottom:16px;line-height:1.8}#brain-info p{font-size:12px}.brain-actions{display:flex;flex-wrap:wrap;gap:10px}button:disabled{opacity:.5;cursor:default}nav{overflow-x:auto}nav button{white-space:nowrap;flex-shrink:0}.note.selected.wrong{background:#f4b7a2;border-color:#ce856b}@media(max-width:760px){#brain-info{padding:14px}.brain-actions button{padding:10px 13px}}