*{box-sizing:border-box;margin:0;padding:0;font-family:Arial,Helvetica,sans-serif}body{background:#f4f6f9}.container{width:90%;max-width:1000px;margin:40px auto}h1{text-align:center;color:#222;margin-bottom:30px}.student-form{flex-wrap:wrap;justify-content:center;gap:15px;margin-bottom:30px;display:flex}.student-form input{border:1px solid #ccc;border-radius:5px;width:220px;padding:10px;font-size:16px}.student-form button{color:#fff;cursor:pointer;background:#0d6efd;border:none;border-radius:5px;padding:10px 20px;font-size:16px}.student-form button:hover{background:#0b5ed7}table{border-collapse:collapse;background:#fff;width:100%}table th{color:#fff;background:#0d6efd;padding:12px}table td{text-align:center;border:1px solid #ddd;padding:12px}table tr:nth-child(2n){background:#f8f9fa}.edit-btn{color:#fff;cursor:pointer;background:#198754;border:none;border-radius:5px;padding:8px 15px}.edit-btn:hover{background:#157347}.delete-btn{color:#fff;cursor:pointer;background:#dc3545;border:none;border-radius:5px;padding:8px 15px}.delete-btn:hover{background:#bb2d3b}