*{
    box-sizing: border-box;
}

body{
    background-color: white;
    padding: 30px;
}

h1{
    width: 100%;
    font-size: 3em;
    border-bottom: 5px double;
}

header, div{
    width: 100%;
}

ul{
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    padding: 10px;
    justify-content: start;
}

li{
    list-style-type: none;
    margin-left: 3%;
    border-right: 2px solid black;
    padding-right: 20px;
}

li:last-of-type{
    border-left: 0px;
    color: black;
}

li:last-of-type{
    border-right: none;
    color: black;
}

span{
    color: black;
}

div{
    color: aqua;
}

main{
    width: 100%;
    margin: 10px auto;
    display: flex;
    flex-wrap: wrap;
}

article{
    width: 25%;
    padding: 0px 20px;
    display: flex;
    flex-wrap: wrap;
}

article > img{
    margin: 30px 0px;
    width: 49%;
}

main > img{
    width: 55%;
}

footer{
    color: darkgrey;
}