header{
    background-color: brown;
}
header>h1, header>h2{
    color:lime;
    text-align: center;
    font-family: Courier, monospace;
    padding: 0px 20px;
}

header > h1{
    font-size: 3rem;
}

header > h2{
    font-size: 2rem;
}

nav>ul{
    list-style-type: none;
    display: flex;
    flex-direction: column;
    
}

nav>ul>li{
    width: 100%;
}

nav>ul>li>a{
    background-color: lightgray;
    display: block;
    text-align: center;
    padding: 10px 0px;
    border: black solid 1px;
}

nav>ul>li>a:active{
    background-color: darkgray;
}


main{
    height: 500px;
    background-color: aquamarine;
}

main>article{
    margin: 10px 15px;
}

footer{
    background-color: lightcyan;
}