header {
    background-color: darkblue;
    color: white;
    padding: 2rem;
}

main {
    width: 70%;
    margin: auto;
    padding: 5rem;
    line-height: 150%;
}

h1 {
    font-size: 2rem;
    font-weight: bold;
}


h2 {
    font-size: 1.5rem;
    font-weight: bold;
}

section {
    display: none;
}

.active {
    display: block;
}