*{box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;padding:20px}.timerContainer{display:flex;flex-direction:column;gap:20px;max-width:600px}.buttonWrap{display:flex;flex-direction:row;gap:10px}.buttonWrap *{height:44px;font-size:16px;border:1px solid #ccc;border-radius:4px;padding:0 12px;cursor:pointer}#datetime-picker{width:250px;margin:0;padding:0 12px}#datetime-picker:disabled{background-color:#f0f0f0;cursor:not-allowed;opacity:.6}button[data-start]{background-color:#007bff;color:#fff;border:none;font-weight:600;transition:background-color .3s ease}button[data-start]:hover:not(:disabled){background-color:#0056b3}button[data-start]:disabled{background-color:#ccc;cursor:not-allowed;opacity:.6}.timer{display:flex;gap:20px;justify-content:flex-start;padding:20px;background-color:#f8f9fa;border-radius:8px}.field{display:flex;flex-direction:column;align-items:center;gap:8px}.value{font-size:32px;font-weight:700;min-width:60px;text-align:center;color:#333}.label{font-size:14px;text-transform:uppercase;color:#666;font-weight:500}