*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:#f5f5f5}button{padding:8px 16px;border:none;border-radius:4px;cursor:pointer;font-size:.9em;background:#007bff;color:#fff;transition:background .2s}button:hover:not(:disabled){background:#0056b3}button:disabled{opacity:.6;cursor:not-allowed}input,textarea{font-family:inherit}