body {
            font-family: 'Roboto', sans-serif;
            margin: 0;
            padding: 0;
            line-height: 1.7;
            color: #333;
        }
        header {
            background: #2a4d9b;
            color: white;
            text-align: center;
            padding: 2.5rem;
        }
        nav {
            background: #f1f3f5;
            padding: 1rem;
            position: sticky;
            top: 0;
            z-index: 100;
        }
        nav a {
            margin: 0 1.2rem;
            text-decoration: none;
            color: #2a4d9b;
            font-weight: 500;
        }
        .content {
            max-width: 900px;
            margin: 2.5rem auto;
            padding: 0 1.2rem;
        }
        h1, h2 {
            color: #2a4d9b;
        }
        ul, ol {
            margin: 1.2rem 0;
            padding-left: 2.2rem;
        }
        li {
            margin-bottom: 0.6rem;
        }
        footer {
                background: #2a4d9b;
    color: white;
    text-align: center;
    padding: 10px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 1.2rem 0;
        }
        @media (max-width: 600px) {
            nav a {
                display: block;
                margin: 0.6rem 0;
            }
            .content {
                padding: 0 0.8rem;
            }
        }