:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--bg-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);--card-bg: rgba(255, 255, 255, .05);--card-border: rgba(255, 255, 255, .1);--primary-gradient: linear-gradient(90deg, #00d2ff 0%, #3a7bd5 100%);--text-main: #ffffff;--text-muted: #a0a0a0;--accent-color: #00d2ff;--font-family: "Inter", system-ui, -apple-system, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background:var(--bg-gradient);color:var(--text-main);min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow-x:hidden}#root{width:100%;max-width:600px;padding:2rem;display:flex;flex-direction:column;gap:2rem}h1{font-size:2rem;font-weight:700;background:linear-gradient(to right,#fff,#a5b4fc);-webkit-background-clip:text;background-clip:text;color:transparent;text-align:center;margin-bottom:1rem}.card{background:var(--card-bg);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--card-border);border-radius:20px;padding:2rem;box-shadow:0 8px 32px #0000005e;display:flex;flex-direction:column;gap:1.5rem;transition:transform .2s ease}.section-title{display:flex;align-items:center;gap:.5rem;font-size:1.1rem;font-weight:600;color:var(--text-muted);margin-bottom:.5rem}.drop-zone{border:2px dashed var(--card-border);border-radius:12px;padding:2rem;text-align:center;cursor:pointer;transition:all .3s ease;background:#0003}.drop-zone:hover,.drop-zone.active{border-color:var(--accent-color);background:#00d2ff0d}.drop-text{color:var(--text-muted);font-size:.9rem;margin-top:.5rem}.input-group{display:flex;gap:.5rem}input[type=text]{flex:1;background:#0000004d;border:1px solid var(--card-border);padding:.8rem 1rem;border-radius:10px;color:#fff;font-size:1rem;outline:none;transition:border-color .2s}input[type=text]:focus{border-color:var(--accent-color)}.btn-primary{background:var(--primary-gradient);border:none;padding:.8rem 1.5rem;border-radius:10px;color:#fff;font-weight:600;cursor:pointer;transition:opacity .2s;display:flex;align-items:center;gap:.5rem}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-primary:hover:not(:disabled){opacity:.9}.result-display{text-align:center;animation:fadeIn .5s ease-out}.key-large{font-size:4rem;font-weight:800;background:var(--primary-gradient);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.1}.bpm-display{font-size:1.5rem;color:var(--text-muted);margin-top:.5rem}.divider{height:1px;background:var(--card-border);margin:.5rem 0}.hidden{display:none}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.spin{animation:spin 1s linear infinite}@media(max-width:480px){#root{padding:1rem}.card{padding:1.5rem}.key-large{font-size:3rem}}