styles.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&display=swap');

* {
    box-sizing: border-box;
}

body {
    font-family: Poppins, sans-serif;
    display: flex;
    line-height: 1.7;
    margin: 0;
    padding: 0;
}

main header, 
nav header {
    font-weight: 700;
    font-size: 1.5em;
}

/* Nav */
nav {
    border-right: 3px solid #333;
    width: 800px;
}

nav header {
    padding: 15px;
}

nav a {
    display: block;
    border-top: 1px solid #333;
    padding: 15px;
    text-decoration: none;
    color: #333;
}

/* Main */
main {
    padding: 20px;
    height: 100vh;
    overflow-y: scroll;
    padding-bottom: 500px;
}

code {
    display: block;
    text-align: left;
    white-space: pre-line;
    position: relative;
    word-break: normal;
    word-wrap: normal;
    line-height: 2;
    background-color: #f7f7f7;
    padding: 15px;
    margin: 10px;
    border-radius: 5px;
    
}

/* Media Query */
@media (max-width: 576px) {
    body {
        flex-direction: column;
    }

    nav {
        border-bottom: 3px solid #333;
        overflow-y: scroll;
        height: 300px;
    }

    main {
        overflow-y: unset
    }
}