body{margin:0;padding:0;background:linear-gradient(135deg,#6b73ff,#000dff);min-height:100vh;font-family:Arial,sans-serif}.center-container{display:flex;align-items:center;justify-content:center;min-height:100vh}.card{background:#fff;border-radius:18px;padding:2rem 3rem;box-shadow:0 6px 30px #00000014;text-align:center}.button{background:#2946ff;color:#fff;border:none;padding:.8rem 2rem;border-radius:10px;font-size:1.1rem;cursor:pointer;margin-top:1.5rem}.button:hover{background:#102086}