* {
    margin: 0;
    padding: 0;
}
body {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
}
p {
    width: fit-content;
    color: white;
    background-color: rgba(0, 0, 0, 0.2);
}

header, footer {
    height: 50px;
    background-color: #333;
}

main {
    flex: 1 1 0;
    display: flex;
    flex-wrap: wrap;
}

sidebar {
    background-color: #666;
    width: 20%;
}

.content {
    flex: 1 1 0;
    background-color: #ccc;
}