* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
}

header {
    display: flex;
    justify-content: space-between;
    background-color: #999;
    height: 15vh;
    align-items: center;
    padding: 0 3vw 0 3vw;
}

ul {
    display: flex;
    list-style-type: none;
    gap: 20px;
}

li:hover {
    text-decoration: underline;
    font-weight: bold;
    cursor: pointer;
}

main {
    min-height: 75vh;
    background-color: red;
    display: flex;
}

.content {
    width: 70%;
    min-height: 50vh;
    background-color: green;
    text-align: center;
}

.card {
    width: 250px;
    height: 250px;
    background-color: yellow;
    border: 1px solid black;
    margin: 10px;
    display: inline-block;
}

.card h2 {
    font-size: 16px;
}

.card p {
    font-size: 12px;
}

.side {
    width: 30%;
    min-height: 50vh;
    background-color: blue;
}

footer {
    height: 10vh;
    background-color: #111;
}