.container {
            max-width: 900px;
            margin: 0 auto;
        }
        .box {
            background: white;
            padding: 20px;
            margin: 20px 0;
            border-radius: 10px;
            box-shadow: 8px 8px 20px rgba(0, 0, 0, 0.2), inset 3px 3px 8px rgba(255, 255, 255, 0.5);
            border: 1px solid #ddd;
        }
        h1 {
            color: blue;
            font-size: 32px;
        }
        h2 {
            color: #2980b9;
            font-size: 28px;
        }
        p {
            font-size: 18px;
            color: #555;
            line-height: 1.6;
        }