* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

a {
  transition: all 0.3s ease-in-out;
  -moz-transition: all 0.3s ease-in-out;
  -webkit-transition: all 0.3s ease-in-out;
}