*{box-sizing: border-box;}

body{
    box-sizing: border-box;

}
h1{
    width: 100%;
    font-size: 3em;
    color: rgb(117, 117, 117);
    border-bottom: 5px double black;
}

header, div{
    width: 100%;
}

ul{
    width: 100%;
    display: flex;
    padding: 20px;
    border: 1px solid black;

}

li{
    list-style-type: none;
    margin-left: 30px;
    border-right: 1px solid black;
    padding-right: 5%;
    color: blue;

}
li:first-of-type{
    margin-left: 0px;

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

main{
    width: 100½;
    margin: 10px auto;
    display: flex;
    flex-wrap: nowrap;
}
article{
    width: 35%;
}

main > img {
    width: 65%;
    margin-right: 20px;

}

article > * {
    margin: 10px 0px;
}
article >img {
    width: 39%;
}

span{
    color: black;
}