CSS da caixa de fronteira
#example1 {
box-sizing: border-box;
}
Southern Right Whale
#example1 {
box-sizing: border-box;
}
header, ul, nav, li, a /* other elements */{
display: block;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
*{
box-sizing: border-box;
}
* {
box-sizing: border-box;
}
* {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}