body {
  background-color: #0B0B3A;
  color: #74FAEC;
  font-family: Courier;
  text-align: center;
}
a:link {
  color: #74FAEC;
  background-color: transparent;
  text-decoration: none;
}

a:visited {
  color: #74FAEC;
  background-color: transparent;
  text-decoration: none;
}

a:hover {
  color: #74FAEC;
  background-color: transparent;
  text-decoration: none;
}

a:active {
  color: #74FAEC;
  background-color: transparent;
  text-decoration: none;
}
.header {
  position: sticky;
  top: 0;
  display: flex;
  border-bottom-style: solid;
  border-bottom-color: #74FAEC;
  border-bottom-width: 3px;
  padding: 5px;
  background-color: #0B0B3A;
  font-size: 150%;
}
.header > div {
  width:min-content;
  margin:auto
}
.imggrid {
  display: inline-grid;
  grid-template-columns: auto auto auto;
  padding: 10px;
}
.imggrid > div {
  text-align: center;
  width:min-content;
  margin:auto
}