:root{--bg:#0f1226;--fg:#e9ecf1;--muted:#a7b0c0;--primary:#6c5ce7;--primary-600:#5a4fd1;--accent:#00d1b2;--card:#15183a;--border:#24284f;--success:#22c55e;--warning:#f59e0b}*{box-sizing:border-box}html,body,#root{height:100dvh;max-height:100dvh}body{margin:0;background:linear-gradient(180deg,#0f1226,#0c1022);color:var(--fg);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;-webkit-font-smoothing:antialiased;overflow:hidden}#root{display:grid;place-items:center}.container{max-width:760px;margin:0 auto;padding:16px 16px 24px;display:flex;flex-direction:column;gap:16px;height:auto;max-height:100%;overflow:auto}.header{display:flex;justify-content:center;align-items:center;gap:12px}.header h1{margin:0;font-size:20px;letter-spacing:.4px}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:12px}.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.sample-btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;border-radius:14px;width:100%;aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#212652,#1a1f45);color:var(--fg);font-weight:700;font-size:18px;letter-spacing:.6px;box-shadow:0 6px 18px #00000040,inset 0 1px #ffffff0d;transition:transform .15s ease,background .2s ease;touch-action:manipulation}.sample-btn:active{transform:scale(.98)}.sample-btn.playing{outline:2px solid var(--success);background:linear-gradient(180deg,#25a244,#1f8f3a);box-shadow:0 0 0 4px #22c55e26,0 6px 18px #00000040,inset 0 1px #ffffff0f;transform:scale(1.03)}.sample-btn.fading{outline:2px solid var(--warning);background:linear-gradient(180deg,#f59e0b,#dd8505);box-shadow:0 0 0 4px #f59e0b2e,0 6px 18px #00000040,inset 0 1px #ffffff0f;transform:scale(1.03)}.controls{display:flex;flex-direction:column;gap:12px}.row{display:flex;gap:10px;align-items:center}.row input[type=text]{flex:1;min-width:0;background:#0e1230;border:1px solid var(--border);color:var(--fg);padding:12px 14px;border-radius:12px}.row .action{white-space:nowrap}.action-btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;border-radius:12px;padding:12px 14px;background:var(--primary);color:#fff;font-weight:700;letter-spacing:.5px;box-shadow:0 6px 18px #6c5ce759;transition:background .2s ease}.action-btn:hover{background:var(--primary-600)}.slider{padding:10px 12px}.slider label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}.slider input[type=range]{width:100%}.footer{opacity:.7;text-align:center;font-size:12px}@media (min-width:800px){.header h1{font-size:22px}.sample-btn{font-size:20px}.grid{grid-template-columns:repeat(3,1fr)}}