body {
  display: grid;
  height: 100vh;
  justify-content: center;
  align-content: center;
  background-color: Gainsboro;
}

main {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: 1fr auto;
  width: 1200px;
  background-color: whitesmoke;
  & a {text-decoration: none; color: black;}
}

.wiki-nav-header {
  grid-column: auto / span 12;
  & h1, h2, h3 {text-align: center; font-weight: normal;}
}

.wiki-column {
  grid-column: auto / span 4;
  margin: 0px 10px 20px 10px;
  align-self: stretch;
}

.wiki-nav {
  background-color: WhiteSmoke;
  border: solid silver 2px;
}

.wiki-nav:hover {
  background-color: Silver;
  transition-duration: 0.5s;
}

.wiki-nav-img {
  display: flex;
  justify-content: center;
  align-content: center;
  height: 250px;
  overflow: hidden;
  & img {min-height: 100%;}
}

.wiki-nav-text {
  padding: 0px 20px 10px 20px;
  & p {text-align: justify;}
  & h1 {font-size: 1.5em;}
}