body{font-family:Segoe UI,sans-serif;background-color:#ebf2fa;color:#333;margin:0;padding:0}body.dark{background-color:#1e1e1e;color:#f0f0f0}button{padding:.5rem 1rem;margin:.5rem 0;border:none;background-color:#0077b6;color:#fff;border-radius:4px;cursor:pointer}button:hover{background-color:#0077b6}input,select{padding:.4rem;margin:.3rem;border:1px solid #ccc;border-radius:4px}