body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
    overflow-x: auto;
}

header {
    background-color: darkblue;
    color: white;
    padding: 10px 0;
    width: 100%;
    text-align: center;
}

header ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 20px;
}

.sidebar {
    width: 20%;
}

.content {
    width: 75%;
}

header ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

header ul li a:hover {
    color: lightgreen;
}

img {
    max-width: 100%;
    height: auto;
    margin-bottom: 20px;
}

p {
    margin-top: 20px;
}

main {
    padding: 20px;
    text-align: center;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}

@media (max-width: 768px) {
    header ul {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    header ul li.title {
        width: 100%;
        text-align: center;
        margin: 0;
    }

    header {
        padding: 10px;
    }

    header ul li a {
        font-size: 1em;
    }

    img {
        max-width: 90%;
    }
}

@media (min-width: 1200px) {
    header {
        padding: 20px;
    }

    header ul li a {
        font-size: 1.5em;
    }
}

* {
    box-sizing: border-box;
}

.clearfix::after {
    content: "";
    display: table;
    clear: both;
}