body { 
  margin-left: 10%; 
  margin-right: 10%; 
  font-family: sans-serif;
  background-color: white;
  color: black;
}

.c1 {
  text-align: center
}

.centeredImage {
  text-align:center;
  margin-top:0px;
  margin-bottom:0px;
  padding:0px;
}

.footer {
  font-size: 75%;
  text-align: center;
}

.nav {
  background-color: #FFFFCC;
  border: none;
  padding: 0.5em;
  width: 100%;
  text-align: center;
}

.nav_60 {
  background-color: yellow;
  border: none;
  padding: 0.5em;
  width: 60%;
  text-align: center;
}