:root{--bg-color: #0a0a0c;--card-bg: rgba(255, 255, 255, .05);--accent-primary: #8b5cf6;--accent-secondary: #d946ef;--text-main: #f8fafc;--text-muted: #94a3b8;--glass-border: rgba(255, 255, 255, .1);--gold: #fbbf24;--wood: #451a03}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Outfit,sans-serif;background-color:var(--bg-color);color:var(--text-main);min-height:100vh;display:flex;justify-content:center;align-items:center;background-image:radial-gradient(circle at 10% 20%,rgba(139,92,246,.15) 0%,transparent 40%),radial-gradient(circle at 90% 80%,rgba(217,70,239,.15) 0%,transparent 40%)}#app{width:100%;max-width:1000px;padding:1rem 2rem;display:flex;flex-direction:column;gap:1rem}header{text-align:center}header h1{font-size:3.5rem;font-weight:700;letter-spacing:-.05em;margin-bottom:.5rem}header h1 span{background:linear-gradient(to right,var(--accent-primary),var(--accent-secondary));background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}header p{color:var(--text-muted);font-size:1.2rem;font-weight:300}.glass{background:var(--card-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:24px;box-shadow:0 8px 32px #0000005e}.controls-card{padding:1.5rem;display:flex;flex-direction:column;gap:1rem;margin-bottom:1rem}.inputs-row{display:flex;flex-wrap:wrap;gap:2rem;align-items:flex-end;justify-content:center}.checkbox-row{display:flex;justify-content:center;border-top:1px solid var(--glass-border);padding-top:1rem}.control-group{display:flex;flex-direction:column;gap:.5rem;flex:1;min-width:200px}label{font-size:.9rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}select{background:#ffffff1a;border:1px solid var(--glass-border);color:#fff;padding:.8rem 1rem;border-radius:12px;font-size:1rem;font-family:inherit;cursor:pointer;transition:all .3s ease}select option,select optgroup{background-color:#1a1a1a;color:#fff}select:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 2px #8b5cf64d}.btn-primary{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;border:none;padding:1rem 2rem;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;display:flex;align-items:center;gap:.5rem}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 20px -10px var(--accent-primary)}.btn-primary:active{transform:translateY(0)}.metronome-controls{display:flex;gap:.5rem}.metronome-controls input{width:80px;background:#ffffff1a;border:1px solid var(--glass-border);color:#fff;padding:.8rem;border-radius:12px;font-size:1rem;font-family:inherit}.btn-secondary{background:#ffffff1a;color:#fff;border:1px solid var(--glass-border);padding:.8rem 1.5rem;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.btn-secondary:hover{background:#fff3}.btn-secondary.active{background:var(--accent-secondary);border-color:var(--accent-secondary)}.checkbox-group{display:flex;gap:1rem;margin-top:.5rem}.checkbox-label{display:flex;align-items:center;gap:.5rem;font-size:.8rem;color:var(--text-muted);cursor:pointer;text-transform:none;letter-spacing:normal}.checkbox-label input{accent-color:var(--accent-primary)}.visualizer-container{display:flex;flex-direction:column;gap:1rem}.scale-info{padding:1rem 1.5rem;text-align:center;border-top:1px solid var(--glass-border);margin-top:.5rem}.scale-info h2{font-size:1.2rem;margin-bottom:.2rem;color:var(--accent-primary)}.key-signature{font-size:.9rem;color:var(--gold);font-weight:600;margin-bottom:.5rem;display:flex;justify-content:center;gap:.3rem}.scale-info p{color:var(--text-muted);line-height:1.4;font-weight:300;font-size:.9rem}.scale-display{padding:1rem;display:flex;justify-content:center;gap:.8rem;flex-wrap:wrap}.note-bubble{width:50px;height:50px;display:flex;align-items:center;justify-content:center;background:#ffffff0d;border:1px solid var(--glass-border);border-radius:50%;font-weight:600;font-size:1.2rem;transition:all .3s cubic-bezier(.4,0,.2,1);cursor:pointer}.note-bubble.active{background:var(--accent-primary);border-color:var(--accent-primary);transform:scale(1.2);box-shadow:0 0 20px var(--accent-primary)}.fingerboard-container{padding:2rem;overflow-x:auto;display:flex;flex-direction:column;align-items:center;gap:2rem}.staff-visualizer{position:relative;width:300px;height:60px;margin-bottom:1rem}.staff-lines{position:absolute;width:100%;height:100%;display:flex;flex-direction:column;justify-content:space-between}.staff-lines .line{height:1px;background:#ffffff4d;width:100%}.clef{position:absolute;left:0;top:-15px;font-size:4rem;color:var(--text-main);line-height:1}.staff-accidents{position:absolute;left:60px;top:0;height:100%;display:flex;gap:4px}.accident{font-size:1.5rem;color:var(--gold);line-height:1;position:relative}.accident.sharp-f{top:-8px}.accident.sharp-c{top:15px}.accident.sharp-g{top:-22px}.accident.sharp-d{top:0}.accident.sharp-a{top:22px}.accident.sharp-e{top:-15px}.accident.sharp-b,.accident.flat-b{top:8px}.accident.flat-e{top:-15px}.accident.flat-a{top:22px}.accident.flat-d{top:0}.accident.flat-g{top:37px}.accident.flat-c{top:15px}.accident.flat-f{top:45px}.fingerboard{position:relative;height:160px;min-width:800px;background:linear-gradient(to bottom,#1a1a1a,#0a0a0a);border-radius:4px;display:flex;flex-direction:column;justify-content:space-around;padding:10px 0;margin-left:40px;overflow:visible}.nut{position:absolute;left:0;top:0;bottom:0;width:10px;background:#333;z-index:2}.string{position:relative;height:2px;background:linear-gradient(to right,#888,#555);width:100%;z-index:1;display:flex;align-items:center}.fret-marker{position:absolute;width:30px;height:30px;background:var(--gold);border-radius:50%;transform:translate(-50%,-50%);display:flex;align-items:center;justify-content:center;color:#000;font-weight:700;font-size:.7rem;opacity:0;transition:opacity .3s,transform .3s;pointer-events:none}.fret-marker.visible{opacity:1;transform:translate(-50%,-50%) scale(1)}.fret-marker.active-marker{background:var(--accent-secondary);box-shadow:0 0 15px var(--accent-secondary);transform:translate(-50%,-50%) scale(1.3);z-index:10}.fret-marker.open-marker{background:transparent;border:2px solid var(--gold);color:var(--gold)}.fret-marker.open-marker.active-marker{border-color:var(--accent-secondary);color:var(--accent-secondary);box-shadow:0 0 15px var(--accent-secondary)}footer{text-align:center;color:var(--text-muted);font-size:.9rem;margin-top:1rem;display:flex;flex-direction:column;gap:.5rem;align-items:center}.donation-link{background:none;color:var(--accent-secondary);text-decoration:none;font-weight:600;font-size:.85rem;padding:.4rem 1rem;border:1px solid rgba(217,70,239,.2);border-radius:20px;transition:all .3s ease;cursor:pointer;font-family:inherit}.donation-link:hover{background:#d946ef1a;border-color:var(--accent-secondary);transform:translateY(-1px)}.floating-container{position:fixed;bottom:2rem;right:2rem;z-index:1000;display:flex;flex-direction:column;align-items:flex-end;gap:1rem}.donation-menu{width:300px;padding:1.5rem;display:flex;flex-direction:column;gap:1rem;transition:all .3s cubic-bezier(.4,0,.2,1);transform-origin:bottom right;opacity:1;transform:scale(1)}.donation-menu.hidden{opacity:0;transform:scale(.8);pointer-events:none}.menu-divider{display:flex;align-items:center;text-align:center;color:var(--text-muted);font-size:.8rem;margin:.5rem 0}.menu-divider:before,.menu-divider:after{content:"";flex:1;border-bottom:1px solid var(--glass-border)}.menu-divider span{padding:0 10px}.menu-btn{background:#ffffff0d;border:1px solid var(--glass-border);color:#fff;padding:.8rem;border-radius:12px;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;gap:.5rem;font-family:inherit}.menu-btn:hover{background:#ffffff1a;border-color:var(--accent-primary)}#walletBrick_container{width:100%}.floating-btn{background:#8b5cf633!important;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid var(--accent-primary)!important;box-shadow:0 8px 32px #0006;padding:.8rem 1.5rem!important;border-radius:30px!important;font-size:1rem!important}.donation-link.expanded{background:var(--accent-primary)!important;border-color:var(--accent-primary)!important;color:#fff}@media (max-width: 768px){.floating-container{bottom:1rem;right:1rem}.floating-btn{padding:.6rem 1rem!important;font-size:.8rem!important}header h1{font-size:2.5rem}.controls-card{flex-direction:column;align-items:stretch}}