*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0f0f0f;--surface: #1a1a2e;--primary: #6c63ff;--primary-hover: #5a52d5;--text: #e0e0e0;--text-muted: #888;--border: #2a2a3e;--danger: #ff4d4d;--success: #4caf50;--warning: #ff9800;--radius: 8px}body{background-color:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Helvetica Neue,sans-serif;font-size:1rem;line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-hover)}@keyframes pageFadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.page-transition{animation:pageFadeIn .25s ease-out}.navbar{display:flex;align-items:center;justify-content:center;position:relative;padding:.75rem 1.5rem;background-color:var(--surface);border-bottom:1px solid var(--border);width:100%}.navbar .brand{font-size:1.25rem;font-weight:700;color:var(--primary)}.key{position:relative;display:flex;align-items:flex-end;justify-content:center;cursor:pointer;-webkit-user-select:none;user-select:none;transition:background-color .15s ease,transform .15s ease,box-shadow .15s ease;-webkit-tap-highlight-color:transparent}.key--white{width:48px;height:180px;background:#fff;border:1px solid var(--border);border-radius:0 0 var(--radius) var(--radius);z-index:1}.key--black{width:30px;height:115px;background:#1a1a2e;border:1px solid #111;border-radius:0 0 4px 4px;z-index:2;position:absolute}.key--active{background:linear-gradient(to bottom,var(--primary),var(--primary-hover))!important;transform:translateY(2px);box-shadow:0 0 15px #6c63ff99;transition:background-color .1s ease,transform .1s ease,box-shadow .1s ease}.key--sustained{background:#6c63ff66!important;box-shadow:0 0 10px #6c63ff4d}.key__shortcut{font-size:.65rem;color:var(--text-muted);padding-bottom:6px;pointer-events:none;text-transform:uppercase}.key--black .key__shortcut{color:var(--text-muted)}.piano-keyboard{position:relative;display:flex;overflow-x:auto;overflow-y:hidden;padding:20px 10px;width:100%;touch-action:none;scrollbar-width:none;scrollbar-color:var(--border) transparent}.piano-keyboard::-webkit-scrollbar{height:0;display:none}.piano-keyboard::-webkit-scrollbar-track{background:transparent}.piano-keyboard::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.piano-keyboard::-webkit-scrollbar-thumb:hover{background:var(--primary)}.piano-keyboard__container{position:relative;display:flex}.piano-keyboard--with-falling{padding-top:220px}@media (max-width: 480px){.piano-keyboard--with-falling{padding-top:140px}}.piano-keyboard__overlay{position:absolute;top:0;left:0;pointer-events:none;z-index:3}.piano-keyboard:after{content:"";position:absolute;bottom:-40px;left:0;right:0;height:40px;background:linear-gradient(to bottom,rgba(255,255,255,.05),transparent);transform:scaleY(-1);pointer-events:none}.piano-keyboard-wrapper{width:100%;display:flex;flex-direction:column;align-items:center}.piano-keyboard__slider{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:90%;max-width:600px;height:8px;border-radius:4px;background:var(--border);outline:none;margin:.5rem 0 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.1s linear}.progress-bar__time{font-size:.75rem;color:var(--text-muted);white-space:nowrap}.shortcut-legend{position:fixed;top:56px;right:1rem;z-index:100;transform:translate(120%);opacity:0;transition:transform .2s ease,opacity .2s ease;pointer-events:none}.shortcut-legend--open{transform:translate(0);opacity:1;pointer-events:auto}.shortcut-legend__card{background-color:var(--surface);border:1px solid 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480px){.piano-page__controls{flex-direction:column;align-items:center;gap:.5rem;padding:.5rem}.key--white{width:36px;height:140px}.key--black{width:22px;height:90px}.key__shortcut{display:none}.volume-control__slider{width:80px}.navbar{padding:.5rem 1rem}.waveform-visualizer{width:150px!important;height:36px!important}}@keyframes keyRipple{0%{transform:translate(-50%,-50%) scale(0);opacity:.6}to{transform:translate(-50%,-50%) scale(2.5);opacity:0}}.key-ripple{position:absolute;top:50%;left:50%;width:40px;height:40px;border-radius:50%;background:#6c63ff4d;pointer-events:none;animation:keyRipple .3s ease-out forwards}@keyframes particleBurst{0%{transform:translate(-50%) translate(0);opacity:1}to{transform:translate(-50%) translate(var(--dx),var(--dy));opacity:0}}.particle-burst{position:absolute;top:0;left:50%;width:4px;height:4px;border-radius:50%;background:var(--primary);pointer-events:none;animation:particleBurst var(--duration) ease-out forwards}.falling-notes{position:relative;overflow:hidden;width:100%}.falling-notes__bar{background:#6c63ffb3;border-radius:var(--radius);pointer-events:none}.waveform-visualizer{border-radius:var(--radius);border:1px solid var(--border);display:block}