/* only one blank line between */
menu {
    color: red
}

navi {
    color: black
}

/* automatically insert a blank line */
button {
    border: 1px
}

sidebar {
    color: #ffe
}

/* always whitespace before { */
hidden {
    opacity: 0%
}

/* no blank lines inside ruleset */
imprint {
    color: blue;
    opacity: 0.5;
    font-size: small
}

/* before colon: no space, after colon: one space only */
footer {
    font-family: Arial;
    float: right;
}
