html {
  height: 100vh;
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* Fixed header and footer for list pages */
body:has(.content) header {
  flex-shrink: 0;
}

body:has(.content) footer {
  flex-shrink: 0;
}

.main {
  flex: 1;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.content {
  width: 100%;
  height: 100%;
  padding: 40px;
  box-sizing: border-box;
  display: flex;
  gap: 80px;
  align-items: center;
  justify-content: space-between;
  overflow: hidden;
}

.topics {
  font-size: 3em;
  max-height: calc(100vh - 200px);
  column-count: 2;
  column-gap: 80px;
  column-fill: auto;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-y: auto;
  overflow-x: hidden;
}

.topics::-webkit-scrollbar {
  display: none;
}

.topics {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.topics li:first-child {
  margin-top: 0;
}

.topics li:last-child {
  margin-bottom: 0;
}

.posts {
  font-size: 2.2em;
  text-align: right;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 0;
}

.posts:empty {
  display: none;
}

a {
  text-decoration: none;
}

.post {
  margin-bottom: 25px;
}

ul {
  list-style: none;
  margin: 0;
}

.topic a {
  position: relative;
  display: inline-block;
  color: inherit;
  text-decoration: none;
  margin-bottom: 25px;
  transition: color 0.5s ease;
}

.topic a::after {
  content: "";
  height: 2px;
  display: block;
  margin-top: 4px;
  background: currentColor;
  width: 0;
  right: 100%;
  position: absolute;
  transition:
    width 0.5s ease,
    right 0.5s ease;
}

.topic a:hover::after,
.topic a.active::after {
  width: 100%;
  right: 0;
}

body:has(.topics:only-child) .content {
  justify-content: flex-start;
}

body:has(.topics:only-child) .topics {
  column-count: 2;
  column-fill: auto;
  max-width: 1200px;
}

@media (max-width: 768px) {
  .topics {
    font-size: 2em;
    padding: 0 20px;
    column-count: 1;
  }

  .posts {
    font-size: 1.47em;
    padding: 0 20px;
  }

  .topic a {
    margin-bottom: 15px;
  }
}