body
{  font-family: Calibri, arial, sans-serif;
   font-size: 24px;
   margin-top:20px;
   margin-left:150px;
   margin-right:150px;
}

img.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.center {
  text-align: center;
}