body {
            margin: 0;
            font-family: Arial, sans-serif;
            background: linear-gradient(120deg, #1e3c72, #2a5298);
            color: white;
        }
        .container {
            height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }
        .box {
            background: rgba(0,0,0,0.4);
            padding: 40px;
            border-radius: 12px;
            width: 400px;
        }
        h1 {
            margin-bottom: 10px;
        }
        p {
            opacity: 0.9;
        }
        a.button {
            display: inline-block;
            margin-top: 20px;
            padding: 12px 25px;
            background: #ff9800;
            color: white;
            text-decoration: none;
            border-radius: 25px;
            font-weight: bold;
            transition: 0.3s;
        }
        a.button:hover {
            background: #e68900;
        }
        footer {
            position: absolute;
            bottom: 10px;
            width: 100%;
            text-align: center;
            font-size: 12px;
            opacity: 0.7;
        }