/*** for PC Browser ***/
@media (min-width:401px)
{
.box {
  border: 2px solid #aaa;

  padding: 2em;
  border-radius: 15px;
}
}


/*** for Smart Phone ***/
@media (max-width:400px)
{
.box {
  border: 2px solid #aaa;

  padding: 2em;
  border-radius: 15px;
}
}