.center-container{min-height:100vh;display:flex;justify-content:center;align-items:center;background-color:#f5f6fa;font-family:Segoe UI,sans-serif}.main-box{background:#fff;padding:2rem 3rem;border-radius:12px;box-shadow:0 10px 20px #0000001a;max-width:500px;width:100%;text-align:center}input{padding:.5rem;font-size:16px;border-radius:6px;border:1px solid #ccc;margin-right:10px}button{padding:.5rem 1rem;background-color:#3498db;color:#fff;border:none;border-radius:6px;cursor:pointer}button:hover{background-color:#2980b9}table{width:100%;margin-top:1rem;border-collapse:collapse}td,th{border:1px solid #ddd;padding:.75rem}