: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}}.container{max-width:720px;margin:0 auto;padding:32px 16px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}header h1{margin:0}.subtitle{margin:8px 0 24px;color:#555}.timer{font-size:72px;font-weight:700;letter-spacing:2px;padding:24px 0}.controls{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:24px}button{padding:10px 14px;border:1px solid #ddd;border-radius:10px;background:#fff;cursor:pointer}button.primary{background:#111;color:#fff;border-color:#111}button.danger{background:#b00020;color:#fff;border-color:#b00020}.settings{border:1px solid #eee;border-radius:12px;padding:16px}.field{display:grid;grid-template-columns:140px 1fr;align-items:center;gap:12px;margin-bottom:12px}input{padding:8px 10px;border:1px solid #ddd;border-radius:10px}.hint{margin:0;color:#666;font-size:14px}.foot{margin-top:24px;color:#888;font-size:13px}