#three-columns {
    display: flex;
    flex-direction: column;
}
header {
    border-bottom: 5px solid #fe81b5;
}
nav {
    grid-area: nav;
    margin-top: 30px;
    width: min-content;
}
nav ul {
    list-style: none;
}
nav ul li {
    background-color: #444864;
    border: 5px dotted #5b6080;
    border-radius: 15px;
    padding: 15px;
    margin-bottom: 13px;
}
nav a:visited {
    color:#6a0ae9;
}
#main-content {
    grid-area: main;
    margin: 30px;
}
aside {
    grid-area: aside;
    margin: 30px;
}
aside div {
    background-color: #444864;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    margin-top: 30px;
    margin-right: 30px;
}
#buttons-list {
    list-style: none;
}
#buttons-list li {
    display: inline-block;
}
#cat1 {
    width: 20vw;
    border-radius: 15px;
    float: right;
    margin: 15px;
}
footer {
    margin-top: 70px;
    background-color: #5b6080;
    display: flex;
    gap: 30px;
    padding: 30px;
}
footer p {
    font-size: 1em;
}
/* lg */ 
@media (min-width: 1024px) {
    #three-columns {
        flex-direction: row;
    }
    aside div {
        width: 20vw;
    }
}