body {
  font-family: sans-serif;
  margin: 0;
}

header {
  position: fixed;
  left: 50%;
  top: 100px;
}

h1 {
  margin-left: -50%;
  color: white;
  text-shadow: 0 0 1px black;
}

a,
a:visited {
  color: white;
}

.close {
  text-decoration: underline;
  cursor: pointer;
}

#modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  background: #000a;
  width: 100%;
  height: 100%;
  text-align: center;
  font-size: 20px;
  color: #fff;
}

#modal-image {
  max-height: 90%;
  max-width: 95%;
  margin: 1rem auto;
}

@media (min-width: 700px) and (max-width: 1000px) {
  .images {
    column-count: 2;
    column-gap: 0;
  }
}

@media (min-width: 1001px) {
  .images {
    column-count: 3;
    column-gap: 0;
  }
}

.images a,
.images img {
  display: block;
  margin: 0;
}

.images img {
  width: 100%;
}