:root{--bg-dark:#0a0c10;--bg-panel:#121620e0;--bg-card:#1a2030bf;--border-glass:#ffffff14;--border-gold:#d4af374d;--gold-primary:#d4af37;--gold-glow:#d4af3773;--gold-light:#f3e5ab;--amber-accent:#f59e0b;--cyan-accent:#38bdf8;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--white-key-w:52px;--white-key-h:240px;--black-key-w:32px;--black-key-h:152px;--piano-wood:#110d0a;--felt-red:#8f1d24}*{box-sizing:border-box;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;margin:0;padding:0}body{background-color:var(--bg-dark);color:var(--text-primary);background-image:radial-gradient(circle at 50% 10%,#1e2a4280 0%,#0000 60%),radial-gradient(circle at 80% 90%,#d4af370f 0%,#0000 40%),linear-gradient(#07090c 0%,#0d1117 100%);flex-direction:column;min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe 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var(--gold-primary), #9e7d23);color:#0d0f12;box-shadow:0 2px 10px var(--gold-glow);font-weight:600}.btn-gold:hover,.btn-gold:active{filter:brightness(1.1);box-shadow:0 4px 16px #d4af3799}.mobile-only-btn{display:none}.mobile-rotate-hint{border-bottom:1px solid var(--border-gold);color:var(--gold-light);text-align:center;background:#d4af371f;justify-content:center;align-items:center;gap:8px;padding:7px 16px;font-size:.74rem;animation:.5s ease-out fadeIn;display:none}@keyframes fadeIn{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.main-controls-bar{border-bottom:1px solid var(--border-glass);z-index:20;background:#0e121bcc;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:10px 24px;transition:max-height .3s,opacity .3s;display:flex}.control-group{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.control-item{border:1px solid var(--border-glass);background:#ffffff08;border-radius:8px;align-items:center;gap:8px;padding:6px 12px;display:flex}.control-label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;font-size:.72rem;font-weight:600}.octave-badge{text-align:center;min-width:22px;color:var(--gold-light);font-family:monospace;font-size:.88rem;font-weight:700}.select-modern{border:1px solid var(--border-glass);color:var(--text-primary);cursor:pointer;background:#181d2a;border-radius:6px;outline:none;max-width:100%;padding:6px 10px;font-size:.8rem}.select-modern:focus{border-color:var(--gold-primary)}.slider-modern{appearance:none;background:#252d3d;border-radius:3px;outline:none;width:85px;height:5px}.slider-modern::-webkit-slider-thumb{appearance:none;background:var(--gold-primary);cursor:pointer;width:15px;height:15px;box-shadow:0 0 6px var(--gold-glow);border-radius:50%}.pedal-toggle{border:1px solid var(--border-glass);color:var(--text-secondary);cursor:pointer;background:#ffffff0d;border-radius:8px;align-items:center;gap:8px;padding:6px 14px;font-size:.8rem;transition:all .2s;display:flex}.pedal-toggle.active{border-color:var(--gold-primary);color:var(--gold-light);box-shadow:0 0 14px var(--gold-glow);background:#d4af3738}.pedal-led{background:#475569;border-radius:50%;width:8px;height:8px;transition:all .2s}.pedal-toggle.active .pedal-led{background:var(--gold-primary);box-shadow:0 0 8px var(--gold-primary)}.pedal-key-hint{background:#ffffff1a;border-radius:3px;padding:1px 5px;font-family:monospace;font-size:.68rem}.piano-experience-container{flex-direction:column;flex:1;justify-content:center;align-items:center;width:100%;padding:16px 20px;display:flex;position:relative}.visualizer-wrapper{border:1px solid #ffffff0f;border-bottom:none;border-top-left-radius:12px;border-top-right-radius:12px;width:100%;max-width:1180px;height:110px;position:relative;overflow:hidden;box-shadow:inset 0 -10px 20px #000c}#audioVisualizer{width:100%;height:100%;display:block}.piano-case{background:linear-gradient(#181310 0%,#0d0a08 100%);border-radius:0 0 12px 12px;width:100%;max-width:1180px;padding:14px 18px 20px;position:relative;box-shadow:0 25px 60px -15px #000000e6,0 0 0 1px #ffffff14,inset 0 2px 4px #ffffff1a}.fallboard-brand{text-align:center;justify-content:center;align-items:center;gap:14px;margin-bottom:10px;display:flex}.brand-line{background:linear-gradient(90deg, transparent, var(--border-gold), transparent);flex:1;height:1px}.piano-badge-title{letter-spacing:4px;text-transform:uppercase;color:var(--gold-primary);text-shadow:0 0 8px #d4af3766;font-size:.78rem;font-weight:700}.piano-viewport-bar{border:1px solid 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.key-shortcut-badge{padding:0 2px;font-size:.55rem}.key.black-key .key-note-badge{font-size:.52rem}.extra-tools-panel,.app-footer{display:none}}