... box-sizing sets the point of the element from which the width is calculated. The default is content-box, which means the stated width of the element applies to the content, and the padding ... on as usual.A value of border-box means the stated width value is the total width of the content, the padding, and the border—in other words, the entire box (without the margin). To illustrate ... right: The first div has the default content-box value for box-sizing, so the stated width—150px—is the width of the content, and the border and padding are added to the content. In the...