*{
    box-sizing: border-box;
}

body{
    font-family: raleway;
    display: flex;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

nav{
    background-color: darkgreen;
    width: 250px;
    height: 100vh;
    border-right: 4px solid #ddd;
}

.nav-header{
    font-size: 25px;
    text-align: center;
    padding: 15px;
}

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

main{
    background-color: rgb(77, 187, 227);
    flex: 1;
    height: 100vh;
    overflow-y: scroll;
    margin: 0;
    padding: 0;
}

section{
    padding: 20px;
    line-height: 1.5;
}

header{
    font-size: 20px;
    padding: 0;
    font-weight: 500;
    margin-bottom: 0;
}

p, li{
    margin: 0;
}

pre{
    background-color: #777;
    padding: 0;
    color: aqua;
    width: auto;
}

code{
    color: #fff;
    display: block;
    text-align: left;
    margin-left: 30px;
    margin-bottom: -20px;
}

@media (max-width: 600px){
    body{
        flex-direction: column;
    }

    main{
        width: 100%;
        height: auto;
        overflow-y: none;
        overflow-x: scroll;
    }

    nav{
        border-bottom: 2px solid #777;
        border-right: none;
        width: 100%;
        height: 200px;
        overflow-y: scroll;
    }
}