body {
    margin: 0;
    color:black;
}
a {
    color: inherit;
    text-decoration: none;
}
h1 {
    font-size: 60px;
    text-align: center;
    border-bottom: 2px solid red;
    margin: 0;
    padding: 20px;
}
#grid {
    display: grid;
    grid-template-columns: 150px 1fr;
}
#grid ul {
    padding-left: 35px;
}
#article {
    border-left: 2px solid red;
    padding-left: 25px;
}
@media (max-width: 800px) {
    #grid {
        display: block;
    }
    #article {
        border-left: none;
    }
    h1 {
        border-bottom: none;
    }
}