body {
        margin: 0;
        font-family: 'Segoe UI', sans-serif;
        background: #f5f7fa;
        color: #333;
    }

    header {
        background: linear-gradient(120deg, #4f46e5, #9333ea);
        color: white;
        padding: 20px;
        text-align: center;
    }

    nav {
        display: flex;
        justify-content: center;
        gap: 20px;
        background: #111;
        padding: 10px;
    }

    nav a {
        color: white;
        text-decoration: none;
        font-weight: bold;
    }

    .container {
        display: grid;
        grid-template-columns: 3fr 1fr;
        gap: 20px;
        padding: 20px;
    }

    .content {
        background: white;
        padding: 20px;
        border-radius: 10px;
    }

    .post {
        margin-bottom: 20px;
    }

    .post h2 {
        margin-bottom: 10px;
    }

    .ad-box {
        background: #e5e7eb;
        text-align: center;
        padding: 20px;
        margin: 20px 0;
        border-radius: 8px;
        font-size: 14px;
        color: #666;
    }

    .sidebar {
        background: white;
        padding: 20px;
        border-radius: 10px;
    }

    footer {
        text-align: center;
        padding: 20px;
        background: #111;
        color: white;
        margin-top: 20px;
    }

    @media(max-width: 768px) {
        .container {
            grid-template-columns: 1fr;
        }