body {
  background-color:#111;
  font-family: 'Noto Sans Math', sans-serif;
  color: #fefed5;
}

#head {
  font-size: 1.5em;
}

#main {
  margin-top: 100px;    
  font-size: 1.5em;
  
}

#foot {
  margin-top: 200px;
  font-size: 0.7em;
  text-align: center;
}

img {
  border:0;
}

a:link {
  text-decoration: none;
  color: #28aa98;
}

a:visited {
  text-decoration: none;
  color: #35d0ba;
}

a:hover {
  text-decoration: underline;
}

a:active {
  text-decoration: underline;
  color: #5edac8;
}

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