body{font-family:Arial,sans-serif;margin:0;padding:2rem;background:#f4f6f8}h1,h2{margin-bottom:.5rem}.card{background:#fff;border-radius:10px;padding:1.5rem;margin-bottom:1.5rem;box-shadow:0 2px 6px #00000014}button{padding:.5rem 1rem;border:none;border-radius:6px;background:#1976d2;color:#fff;cursor:pointer}button:hover{background:#125ea8}input{padding:.5rem;border-radius:6px;border:1px solid #ccc}