html {
    width: 100%;
    background-color: bisque;
    display: flex;
    justify-content: center;
}

body {
    width: 90%;
    margin: 0;
    padding: 2em;
    background-color: burlywood;
}

a {
    color: darkred;
    text-decoration: none;
}

blockquote {
    border-left: 4px solid sienna;
    margin-left: 0;
    padding-left: 1em;
    color: #4b2e05;
}

.hidden-just-for-reference {
    display: none;
}

.language-javascript {
    border-radius: 0.5em;
    padding: 1em;
    background-color: #484848;
    color: burlywood;
    width: auto;
}

details {
    background-color: sienna;
    border-radius: 0.4em;
    padding: 0.3em;
    margin-bottom: 0.1em;
    cursor: pointer;
}