.main {
  /* max-width: 1000px; */
  margin: auto;
  background-color: #008080;
  text-align: center;
  }

.block {
  color: white;
  text-align: left;
  padding: 25px;
  margin-left: 25%;
  margin-right: 25%;
  }
 
.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
  padding: 10px;
}

.footer {
  text-align: right;
  color: grey;
  }