@import "https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap";:root{font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Outfit,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-weight:400;line-height:1.5}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;color:#f3f4f6;--bg-gradient:radial-gradient(circle at 50% 50%, #0c0f17 0%, #030406 100%);--panel-bg:#12162166;--panel-border:#ffffff0f;--panel-border-hover:#ffffff1f;--primary:#00f0ff;--primary-glow:#00f0ff40;--primary-end:#00b0ff;--secondary:#8b5cf6;--secondary-glow:#8b5cf640;--secondary-end:#6d28d9;--success:#10b981;--success-glow:#10b98140;--warning:#f59e0b;--warning-glow:#f59e0b59;--danger:#ef4444;--danger-glow:#ef444440;--text-primary:#fff;--text-secondary:#9ca3af;--text-muted:#6b7280;--text-on-primary:#030406;--surface-tint-rgb:255, 255, 255;--shadow-panel:0 8px 32px 0 #0006;--input-bg:#0b0c10;--input-text:#fff;--tooltip-bg:#10131c;--tooltip-border:#00f0ff4d;--scrollbar-track:#0003;--scrollbar-thumb:#ffffff14;--scrollbar-thumb-hover:#ffffff26;background-color:#050608}:root[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:#1c2129;--bg-gradient:radial-gradient(circle at 50% 0%, #fffdf8 0%, #f1ead8 55%, #e8dfc6 100%);--panel-bg:#fffdf8b3;--panel-border:#28201017;--panel-border-hover:#2820102e;--primary:#0e7a86;--primary-glow:#0e7a862e;--primary-end:#0a5f6e;--secondary:#6d28d9;--secondary-glow:#6d28d929;--secondary-end:#55199e;--success:#047857;--success-glow:#04785729;--warning:#b45309;--warning-glow:#b4530933;--danger:#dc2626;--danger-glow:#dc26262e;--text-primary:#17191f;--text-secondary:#565c6b;--text-muted:#7c8294;--text-on-primary:#fff;--surface-tint-rgb:23, 18, 8;--shadow-panel:0 8px 28px 0 #503e1e1f;--input-bg:#fffdf8;--input-text:var(--text-primary);--tooltip-bg:#fffdf8;--tooltip-border:#0e7a8659;--scrollbar-track:#1712080d;--scrollbar-thumb:#17120824;--scrollbar-thumb-hover:#17120838;background-color:#f4f0e6}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-gradient);background-attachment:fixed;min-width:320px;min-height:100vh;margin:0;overflow-x:hidden}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--scrollbar-track)}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-thumb-hover)}.glass-panel{background:var(--panel-bg);-webkit-backdrop-filter:blur(16px);border:1px solid var(--panel-border);box-shadow:var(--shadow-panel);border-radius:16px;transition:border-color .3s,box-shadow .3s}.glass-panel:hover{border-color:var(--panel-border-hover)}.glass-card{background:rgba(var(--surface-tint-rgb), .02);border:1px solid rgba(var(--surface-tint-rgb), .04);cursor:pointer;border-radius:12px;padding:1.5rem;transition:all .3s cubic-bezier(.4,0,.2,1)}.glass-card:hover{background:rgba(var(--surface-tint-rgb), .05);border-color:rgba(var(--surface-tint-rgb), .1);transform:translateY(-2px)}.glass-card.active{background:var(--primary-glow);border-color:var(--primary);box-shadow:0 0 15px var(--primary-glow)}.btn{border:1px solid rgba(var(--surface-tint-rgb), .1);background:rgba(var(--surface-tint-rgb), .03);color:var(--text-primary);cursor:pointer;border-radius:10px;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-family:inherit;font-size:.95rem;font-weight:500;transition:all .2s cubic-bezier(.4,0,.2,1);display:inline-flex}.btn:hover{background:rgba(var(--surface-tint-rgb), .08);border-color:rgba(var(--surface-tint-rgb), .2)}.btn:active{transform:scale(.97)}.btn-primary{background:linear-gradient(135deg, var(--primary) 0%, var(--primary-end) 100%);color:var(--text-on-primary);box-shadow:0 4px 15px var(--primary-glow);border:none;font-weight:600}.btn-primary:hover{background:linear-gradient(135deg, color-mix(in srgb, var(--primary) 80%, white) 0%, color-mix(in srgb, var(--primary-end) 80%, white) 100%);box-shadow:0 6px 20px var(--primary-glow)}.btn-secondary{background:linear-gradient(135deg, var(--secondary) 0%, var(--secondary-end) 100%);color:#fff;box-shadow:0 4px 15px var(--secondary-glow);border:none}.btn-secondary:hover{background:linear-gradient(135deg, color-mix(in srgb, var(--secondary) 80%, white) 0%, color-mix(in srgb, var(--secondary-end) 80%, white) 100%);box-shadow:0 6px 20px var(--secondary-glow)}.input-field{background:var(--input-bg);color:var(--input-text);border:1px solid rgba(var(--surface-tint-rgb), .14);border-radius:6px;outline:none;font-family:inherit}.input-field:focus{border-color:var(--primary)}.key-hint{background:var(--input-bg);min-width:1.3em;color:var(--input-text);border:1px solid rgba(var(--surface-tint-rgb), .14);border-radius:4px;justify-content:center;align-items:center;padding:1px 6px;font-family:inherit;font-size:.72rem;font-style:normal;font-weight:600;line-height:1.6;display:inline-flex}.theme-toggle{border:1px solid var(--panel-border);background:rgba(var(--surface-tint-rgb), .03);width:36px;height:36px;color:var(--text-secondary);cursor:pointer;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;transition:background .15s,border-color .15s,color .15s,transform .15s;display:flex}.theme-toggle:hover{background:rgba(var(--surface-tint-rgb), .08);border-color:var(--panel-border-hover);color:var(--text-primary)}.theme-toggle:active{transform:scale(.93)}.app-container{min-height:100vh;display:flex}.main-content{flex:1;max-width:1400px;margin:0 auto;padding:2rem;overflow-y:auto}.keyboard-container{-webkit-user-select:none;user-select:none;background:#0f1219;border:1px solid #ffffff0d;border-radius:14px;padding:1.5rem;display:flex;position:relative;overflow-x:auto;box-shadow:inset 0 0 20px #000c}.piano-key{cursor:pointer;transition:background .1s,box-shadow .1s;position:relative}.piano-key.white{z-index:1;background:linear-gradient(#fff 0%,#e2e8f0 100%);border:1px solid #94a3b8;border-right:none;border-radius:0 0 4px 4px;width:42px;height:160px}.piano-key.white:last-child{border-right:1px solid #94a3b8}.piano-key.white:hover{background:linear-gradient(#f8fafc 0%,#cbd5e1 100%)}.piano-key.white.active{z-index:2;background:linear-gradient(#a5f3fc 0%,#00f0ff 100%);box-shadow:0 5px 15px #00f0ff40}.piano-key.white.highlight-correct{z-index:2;background:linear-gradient(#a7f3d0 0%,#10b981 100%);box-shadow:0 5px 15px #10b98140}.piano-key.black{z-index:3;background:linear-gradient(#1e293b 0%,#0f172a 100%);border:1px solid #020617;border-radius:0 0 3px 3px;width:26px;height:100px;margin-left:-13px;margin-right:-13px}.piano-key.black:hover{background:linear-gradient(#334155 0%,#1e293b 100%)}.piano-key.black.active{background:linear-gradient(#8b5cf6 0%,#6d28d9 100%);box-shadow:0 3px 10px #8b5cf640}.piano-key.black.highlight-correct{background:linear-gradient(#10b981 0%,#047857 100%);box-shadow:0 3px 10px #10b98140}.piano-key.white.highlight-root{z-index:2;background:linear-gradient(#fde68a 0%,#f59e0b 100%);box-shadow:0 5px 15px #f59e0b59}.piano-key.black.highlight-root{background:linear-gradient(#f59e0b 0%,#b45309 100%);box-shadow:0 3px 10px #f59e0b59}.fretboard-container{-webkit-user-select:none;user-select:none;background:#0d0906;border:1px solid #ffffff0f;border-radius:14px;padding:1.1rem .75rem;position:relative;overflow-x:auto;box-shadow:0 20px 45px #000000a6,inset 0 0 0 3px #050302,inset 0 0 0 4px #e6d2aa24}.fretboard-strings-container{background-image:linear-gradient(#ffffff12 0%,#fff0 16%,#0000 66%,#0000004d 100%),url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='140'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.009 0.09' numOctaves='4' seed='11'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0.15 0 0 0 0 0.09 0 0 0 0 0.05 0 0 0 0.55 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)'/%3E%3C/svg%3E"),linear-gradient(160deg,#3c2617 0%,#2a1810 50%,#1b0f09 100%);background-repeat:no-repeat,repeat,no-repeat;border-radius:6px;flex-direction:column;min-width:760px;display:flex;position:relative;box-shadow:inset 0 0 40px #00000080}.inlay-layer{pointer-events:none;z-index:1;position:absolute;inset:0 0 0 60px}.inlay-dot{background:radial-gradient(circle at 32% 28%,#fff 0%,#e8e2d0 25%,#cbbfa0 55%,#9c8f6d 100%);border-radius:50%;width:11px;height:11px;position:absolute;transform:translate(-50%,-50%);box-shadow:0 1px 2px #0009,inset 0 0 2px #fff9}.guitar-string-row{align-items:center;height:40px;display:flex;position:relative}.fret-cell{cursor:pointer;flex:none;justify-content:center;align-items:center;height:100%;display:flex;position:relative}.fret-cell:hover{background:#ffffff08}.fret-cell:not(.nut-cell):after{content:"";background:linear-gradient(90deg,#ffffffd9,#cfcfd2 25%,#7c7c82 55%,#3d3d42 80%,#ffffff4d);border-radius:1px;width:3px;position:absolute;top:2px;bottom:2px;right:0;box-shadow:1px 0 3px #0009}.fret-area{flex:1;height:100%;display:flex;position:relative}.nut-cell{background:#ffffff04;flex:0 0 60px;width:60px}.nut-cell:after{content:"";z-index:5;background:linear-gradient(90deg,#fbf6e8 0%,#e9dfc0 35%,#cbbf9c 60%,#a8987a 100%);border-radius:2px;width:7px;position:absolute;top:-2px;bottom:-2px;right:-3px;box-shadow:2px 0 6px #0000008c,inset -1px 0 1px #ffffff80}.guitar-string-line{pointer-events:none;background-image:linear-gradient(#f4f6f8 0%,#cfd6dd 30%,#7d868f 55%,#cfd6dd 75%,#f4f6f8 100%);border-radius:2px;position:absolute;left:0;right:0;box-shadow:0 1px 3px #000000bf}.string-thickness-6{height:3.5px}.string-thickness-5{height:2.8px}.string-thickness-4{height:2.2px}.string-thickness-3{height:1.8px}.string-thickness-2{height:1.2px}.string-thickness-1{height:.8px}.guitar-note-marker{z-index:10;background:radial-gradient(circle at 32% 28%,#ffffff59,#ffffff0d 45%,#00000040 100%),#ffffff14;border:1px solid #ffffff40;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;font-size:.75rem;font-weight:600;transition:all .15s cubic-bezier(.4,0,.2,1);display:flex;position:relative;box-shadow:0 2px 5px #0000008c}.fret-cell:hover .guitar-note-marker{border-color:#ffffff80;transform:scale(1.15)}.guitar-note-marker.active{color:#030406;background:radial-gradient(circle at 32% 28%,#ffffff8c,#00f0ff 55%,#00b8c4 100%);border-color:#fff9;transform:scale(1.1);box-shadow:0 0 14px #00f0ff40,0 2px 6px #00000080}.guitar-note-marker.highlight-correct{color:#030406;background:radial-gradient(circle at 32% 28%,#ffffff80,#10b981 55%,#0a7d5c 100%);border-color:#fff9;transform:scale(1.1);box-shadow:0 0 14px #10b98140,0 2px 6px #00000080}.guitar-note-marker.highlight-root{color:#030406;background:radial-gradient(circle at 32% 28%,#ffffff8c,#f59e0b 55%,#b9740a 100%);border-color:#fff9;transform:scale(1.15);box-shadow:0 0 14px #f59e0b59,0 2px 6px #00000080}.fret-ruler-row{border-top:1px solid #ffffff14;margin-top:.35rem;padding-top:.35rem;display:flex}.fret-ruler-nut{text-align:center;color:#ffffff8c;flex:0 0 60px;width:60px;font-size:.68rem;font-weight:700}.fret-ruler-area{flex:1;display:flex}.fret-ruler-cell{text-align:center;color:#ffffff73;font-size:.68rem;font-weight:600}@media (width<=640px){.fretboard-container{scroll-snap-type:x proximity;padding:.8rem .4rem}.fretboard-strings-container{min-width:560px}.inlay-layer{left:44px}.guitar-string-row{height:32px}.nut-cell{z-index:6;scroll-snap-align:start;background:#1b120b;flex-basis:44px;width:44px;position:sticky;left:0}.guitar-note-marker{width:19px;height:19px;font-size:.62rem}.inlay-dot{width:9px;height:9px}.fret-ruler-nut{flex-basis:44px;width:44px}.fret-ruler-cell,.fret-ruler-nut{font-size:.6rem}.fret-area .fret-cell:nth-child(3),.fret-area .fret-cell:nth-child(5),.fret-area .fret-cell:nth-child(7),.fret-area .fret-cell:nth-child(9),.fret-area .fret-cell:nth-child(12){scroll-snap-align:start}}.lab-header{margin-bottom:2rem}.path-card:hover{border-color:var(--card-accent,var(--panel-border-hover))}.lab-title{background:linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:.5rem;font-size:2rem;font-weight:700}.lab-description{color:var(--text-secondary);font-size:1rem}@keyframes pulseGlow{0%{box-shadow:0 0 5px var(--primary-glow)}50%{box-shadow:0 0 20px var(--primary-glow)}to{box-shadow:0 0 5px var(--primary-glow)}}.pulse-primary{animation:2s infinite pulseGlow}.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem;display:grid}.grid-3{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;display:grid}.term{border-bottom:1px dotted var(--text-secondary);cursor:help;outline:none;position:relative}.term:focus{border-bottom-color:var(--primary)}.term-tip{transform:translateX(calc(-50% + var(--tip-shift,0px))) translateY(4px);background:var(--tooltip-bg);border:1px solid var(--tooltip-border);width:250px;max-width:min(70vw,250px);color:var(--text-secondary);text-align:left;text-transform:none;white-space:normal;opacity:0;visibility:hidden;pointer-events:none;z-index:100;border-radius:10px;padding:.65rem .8rem;font-size:.78rem;font-weight:400;line-height:1.5;transition:opacity .15s,transform .15s,visibility .15s;position:absolute;bottom:calc(100% + 10px);left:50%;box-shadow:0 8px 25px #0009}.term-tip.term-tip--below{transform:translateX(calc(-50% + var(--tip-shift,0px))) translateY(-4px);top:calc(100% + 10px);bottom:auto}.term:hover .term-tip,.term:focus .term-tip{opacity:1;visibility:visible;transform:translateX(calc(-50% + var(--tip-shift,0px))) translateY(0)}.term-tip strong{color:var(--primary);margin-bottom:3px;font-size:.8rem;display:block}