body{background:#f4f4f4;margin:0;font-family:sans-serif}.container{max-width:800px;margin:0 auto}.card{background:#fff;border-radius:8px;margin-bottom:20px;padding:20px;box-shadow:0 2px 4px #0000001a}input,textarea{box-sizing:border-box;border:1px solid #ddd;width:100%;margin:5px 0;padding:10px}button{color:#fff;cursor:pointer;background:#007bff;border:none;border-radius:4px;padding:10px 15px}button:hover{background:#0056b3}a{color:#007bff;text-decoration:none}