body{font-family:Arial,sans-serif;background:linear-gradient(to right,#5f9ea0,#4682b4);display:flex;justify-content:center;align-items:center;min-height:100vh}.container{background:#fffc;padding:30px;border-radius:12px;width:350px;text-align:center}button{margin-top:10px;padding:10px;width:100%;cursor:pointer}.spinner{border:4px solid #eee;border-top:4px solid #4682b4;border-radius:50%;width:30px;height:30px;animation:spin 1s linear infinite;margin:10px auto}.large{width:60px;height:60px}@keyframes spin{to{transform:rotate(360deg)}}