*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

html,body {
    font-family: "Roboto" , sans-serif;
    font-weight: 300;
    line-height: 1.4;
    scroll-behavior: smooth;
}

a{
    text-decoration: none;

}

body{
    display: flex;
}

header {
    border: 1px solid #ccc;
    height: 100vh;
}

nav h1 {
    font-size: 25px;
    font-weight: 500;
    padding: 10px;
    border-bottom: 1px solid #ccc;
}

nav ul {
    list-style: none;
}

nav ul li{
    border-bottom: 1px solid #ccc;
    padding :10px;
    color: black;
}

nav ul li:hover {
    background: #ccc;
    transition: 0.3s ease-in-out;
}

/* main section */

main{
    padding: 50px;
    max-width: 1200px;
}
section{
    margin-bottom: 50px;
}

section article {
    font-size: 14px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

section h2 {
    padding-bottom: 10px;
    font-size: 25px;
    font-weight: 400;
    border-bottom: 1px solid #ccc;
    margin-bottom: 20px;
}

section article ul {
    margin-left: 20px;

}

section article ul li {
    margin-bottom: 10px;
}

code {
white-space: pre-line;
line-height: 2;
background: #f7f7f7;
padding: 15px;
margin: 10px;
border-radius: 5px;
}

@media (max-width : 480px) {
    body {
        flex-direction: column;
    }

    header { 
        height: auto;
        overflow: hidden;
        overflow-y: scroll;
    }
    
}