:root {
  color-scheme: light dark;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
  margin: 0;
  display: grid;
  grid-template-rows: auto 1fr;
  height: 100vh;
}

header {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid #7774;
}

header h1 {
  margin: 0;
  font-size: 20px;
}

#search {
  flex: 1;
  max-width: 360px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid #8886;
}

main {
  min-height: 0;
  display: grid;
  grid-template-columns: 320px 1fr;
}

aside {
  border-right: 1px solid #7774;
  overflow: auto;
}

#doc-list {
  margin: 0;
  padding: 8px;
  list-style: none;
}

#doc-list li {
  margin-bottom: 4px;
}

#doc-list button {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
}

#doc-list button:hover,
#doc-list button.active {
  border-color: #8888;
  background: #8882;
}

#viewer {
  overflow: auto;
  padding: 24px;
  line-height: 1.75;
}

#viewer h1,
#viewer h2,
#viewer h3 {
  line-height: 1.3;
}

.placeholder {
  opacity: 0.75;
}

@media (max-width: 900px) {
  main {
    grid-template-columns: 1fr;
  }

  aside {
    max-height: 40vh;
    border-right: none;
    border-bottom: 1px solid #7774;
  }
}