pre {
    font-family: 'Courier New', Courier, monospace;
    background-color: #333;
    padding: $padding-div;
    margin: $padding-div 0;
    width: fit-content;
    color: #fff;
    box-shadow: 0 0.5rem 1.5rem 0.125rem rgba(0,0,0,0.25);
    span {
        font-family: 'Courier New', Courier, monospace;
    }
    .selector {
        color: yellow;
    }
    .properties {
        color: skyblue;
    }
    .values {
        color: lightgreen;
    }
    .rule {
        color: violet;
    }
}