CSS The Box Model

.small-block {
    overflow: scroll;
}

See also: Overflow

div {
    margin: auto;
}

See also: Margin

.invisible-elements {
    visibility: hidden;
}

See also: Visibility

.container {
    box-sizing: border-box;
}

See also: Box-sizing

.block-one {
    margin: 20px;
    padding: 10px;
}

See also: Margin / Padding

.column {
    max-width: 200px;
    width: 500px;
}

See also: max-width / min-width / max-height / min-height