*{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,sans-serif;background:#f5f5f5}input{display:block;width:100%;padding:8px;margin-bottom:8px;border:1px solid #ccc;border-radius:4px}button{padding:8px 16px;background:#2563eb;color:#fff;border:none;border-radius:4px;cursor:pointer}button:hover{background:#1d4ed8}