* {
            box-sizing: border-box;
            font-family: Arial, Helvetica, sans-serif;
        }

        body {
            margin: 0;
            min-height: 100vh;
            background: linear-gradient(135deg, #cfe9ff, #9fcfff);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .container {
            background-color: #ffffff;
            padding: 40px;
            border-radius: 16px;
            width: 90%;
            max-width: 600px;
            text-align: center;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }

        h1 {
            margin-bottom: 10px;
            color: #003366;
            font-size: 2.2em;
        }

        h2 {
            margin-top: 0;
            margin-bottom: 30px;
            color: #0066aa;
            font-weight: normal;
        }

        img {
            max-width: 100%;
            height: auto;
            margin-bottom: 30px;
        }

        .btn {
            display: inline-block;
            padding: 14px 28px;
            font-size: 16px;
            color: white;
            background-color: #0066cc;
            border: none;
            border-radius: 10px;
            cursor: pointer;
            text-decoration: none;
            transition: background-color 0.2s ease, transform 0.1s ease;
        }

        .btn:hover {
            background-color: #004f9e;
            transform: translateY(-2px);
        }

        .btn:active {
            transform: translateY(0);
        }

        footer {
            margin-top: 30px;
            font-size: 0.9em;
            color: #666;
        }