.piano-container{-webkit-overflow-scrolling:touch;background:#e4b97d0d;border:2px solid #e4b97d8c;border-radius:8px;justify-content:center;padding:16px;display:flex;overflow-x:auto;box-shadow:0 0 20px #e4b97d14}.piano{background:#000;border-radius:0 0 6px 6px;flex-shrink:0;height:160px;padding:8px 8px 0;display:flex;position:relative}@media (max-width:768px){.piano-container{justify-content:flex-start}}@media (max-width:480px){.piano-container{border-radius:6px;padding:10px 8px}.piano{height:140px}.piano-key.white{height:130px}.piano-key.black{height:82px}}.piano-key{cursor:pointer;border:none;transition:background 80ms,transform 80ms}.piano-key.white{background:#f5f5f5;border-radius:0 0 4px 4px;flex-direction:column;justify-content:flex-end;align-items:center;width:42px;height:150px;margin-right:2px;padding-bottom:8px;display:flex}.piano-key.white:hover{background:#fff}.piano-key.white:active{background:#d0d0d0;transform:translateY(2px)}.piano-key.white.active{background:#dbeafe;box-shadow:inset 0 0 0 3px #3b82f6}.piano-key.white.correct{background:#4ade80;animation:.3s pulse-green}.piano-key.white.wrong{background:#f87171;animation:.3s shake}.piano-key.black{z-index:10;width:28px;height:95px;left:calc(var(--position) * 44px - 6px);background:#1a1a1a;border:1px solid #ffffff0d;border-radius:0 0 3px 3px;position:absolute;top:8px}.piano-key.black:hover{background:#2a2a2a}.piano-key.black:active{background:#0d0d0d;height:93px;transform:translateY(2px)}.piano-key.black.active{background:#3b82f6;box-shadow:inset 0 0 0 1px #fff9}.piano-key.black.correct{background:#4ade80;animation:.3s pulse-green}.piano-key.black.wrong{background:#f87171;animation:.3s shake}.note-label{color:#999;-webkit-user-select:none;user-select:none;font-size:9px;font-weight:400}@keyframes pulse-green{0%{transform:scale(1)}50%{transform:scale(1.02)}to{transform:scale(1)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-3px)}75%{transform:translate(3px)}}
.settings-overlay{z-index:100;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#000c;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.settings-modal{background:#0a0a0a;border:1px solid #ffffff1a;border-radius:8px;min-width:360px;max-width:90vw;max-height:90vh;padding:24px;overflow-y:auto}.settings-header{z-index:1;background:#0a0a0a;border-bottom:1px solid #ffffff14;justify-content:space-between;align-items:center;margin:-24px -24px 20px;padding:18px 24px 14px;display:flex;position:sticky;top:-24px}.settings-header h2{color:#fff;margin:0;font-size:1.1rem;font-weight:500}.close-btn{color:#fff9;cursor:pointer;background:0 0;border:1px solid #ffffff1a;border-radius:4px;width:28px;height:28px;font-size:.9rem;transition:all .15s}.close-btn:hover{color:#fff;background:#ffffff0f;border-color:#fff3}.settings-content{flex-direction:column;gap:12px;display:flex}.setting-row{background:#ffffff08;border:1px solid #ffffff0f;border-radius:6px;justify-content:space-between;align-items:center;padding:12px 14px;display:flex}.setting-label{color:#fff;font-size:.9rem}.toggle-btn{color:#fff9;cursor:pointer;background:0 0;border:1px solid #ffffff26;border-radius:4px;padding:6px 16px;font-size:.85rem;font-weight:500;transition:all .15s}.toggle-btn:hover{color:#fff;background:#ffffff0f}.toggle-btn.active{color:#e4b97d;background:#e4b97d24;border-color:#e4b97d80}.interval-control{align-items:center;gap:10px;display:flex}.interval-slider{appearance:none;cursor:pointer;background:#fff3;border-radius:2px;width:110px;height:3px}.interval-slider::-webkit-slider-thumb{appearance:none;cursor:pointer;background:#fff;border-radius:50%;width:12px;height:12px}.interval-slider::-moz-range-thumb{cursor:pointer;background:#fff;border:none;border-radius:50%;width:12px;height:12px}.interval-value{color:#ffffffb3;min-width:80px;font-size:.85rem;font-weight:500}.note-count-selector{gap:4px;display:flex}.note-count-btn{color:#fff9;cursor:pointer;background:0 0;border:1px solid #ffffff26;border-radius:4px;justify-content:center;align-items:center;width:36px;height:36px;font-size:.95rem;font-weight:500;transition:all .15s;display:inline-flex}.note-count-btn:hover{color:#fff;background:#ffffff0f}.note-count-btn.active{color:#e4b97d;background:#e4b97d24;border-color:#e4b97d80}@media (max-width:480px){.settings-overlay{padding:0}.settings-modal{border:none;border-radius:0;width:100%;min-width:0;max-width:100vw;height:100vh;max-height:100vh;padding:16px}.settings-header{margin:-16px -16px 14px;padding:14px 16px 10px;top:-16px}.setting-row{flex-wrap:wrap;gap:8px;padding:10px 12px}.setting-label{font-size:.85rem}.interval-slider{width:90px}.note-count-btn{width:32px;height:32px;font-size:.9rem}}