CSSstart/assets/scss/inc/_grid.scss

*,
*:after,
*:before{
  box-sizing: inherit;
}
html{
  box-sizing: border-box;
  font-size: 62.5%;
}
.float-right{
  float: right;
}
.float-left{
  float: left;
}
main{
  max-width: $wrapper;
  margin: 0 auto;
}