* {
box-sizing: border-box;
}
html {
font-family: helvetica;
font-size: 16px;
html,
body {
margin: 0;
padding: 0;
body{
height: 100%;
#subContainer {
display: flex;
min-height: 100%;
#mainContainer {
flex: 1 1 0px;
margin: .5em;