.stopur-wrap{max-width:700px;margin:20px auto;padding:20px;border:1px solid #ccc;border-radius:12px;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;text-align:center}.stopur-display{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;font-size:72px;margin-bottom:14px;display:inline-block;min-width:12ch;text-align:center;letter-spacing:.02em;white-space:nowrap;user-select:none}.stopur-controls{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.btn{padding:12px 18px;border-radius:10px;border:none;font-weight:700;color:#fff;cursor:pointer;transition:background .15s ease,transform .05s ease}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn.start{background:#2faa46}.btn.start:hover:not(:disabled){background:#248a3a}.btn.stop{background:#d83a3a}.btn.stop:hover:not(:disabled){background:#b82f2f}.btn.lap{background:#2A7ABF}.btn.lap:hover:not(:disabled){background:#1f5f96}.btn.reset{background:#111}.btn.reset:hover:not(:disabled){background:#000}.laps-list{text-align:left;margin-top:14px}@media (max-width:600px){.stopur-display{font-size:54px}.btn{flex:1 1 45%}}