body {
  margin: 10px 0;
  background-color: #fff;
  text-align: center;
}

h1 {
  width: 86%;
  margin: 10px auto;
  color: #888;
  font-size: 180%;
  line-height: 150%;
  font-weight: bold;
  border-width: 2px 0;
  border-style: solid;
  border-color: #888;
  background-color: #fff;
}

a, a:hover, a:active, a:visited {
  color: #000;
}

#main {
  margin: 10px auto 0 auto;
  padding: 5px;
  background-color: #eee;
  border: 2px solid #222;
  font-size: 14px;
  line-height: 26px;
  font-family: monospace;
  border-radius: 8px;
  --page-width: 600px;
}

#main.w650 {
  --page-width: 650px;
}

.center {
  margin: 10px auto;
}

.spread {
  display: flex;
  justify-content: center;
  width: 100%;
  max-width: calc(var(--page-width) * 2);
  margin: 54px auto;
}

.spread img {
  width: 50%;
  height: auto;
  display: block;
}

.spread.single img {
  width: 100%;
  max-width: var(--page-width);
}

form.post {
  background-color: #eee;
  margin: 10px auto;
  padding: 5px;
  border: 2px solid #222;
  border-radius: 8px;
}

form.post a {
  color: #f00;
  text-decoration: none;
}

form.post a:hover {
  color: #fff;
  background-color: #f00;
}