:root {
  --bg: #ffffff;
  --text: #202020;
  --muted: #7b7b7b;
  --faint: #a2a2a2;
  --line: #e8e8e8;
  --link: #202020;
}

body[data-theme="gray"] {
  --bg: #d7d7d7;
  --text: #242424;
  --muted: #666666;
  --faint: #858585;
  --line: #bdbdbd;
  --link: #242424;
}

body[data-theme="black"] {
  --bg: #131313;
  --text: #eeeeee;
  --muted: #aaaaaa;
  --faint: #7f7f7f;
  --line: #333333;
  --link: #f1f1f1;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont,
    "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--link);
}

.board-shell {
  width: min(92vw, 720px);
  margin: 0 auto;
  padding: 1.6rem 0 3.5rem;
}

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.3rem;
  padding-bottom: .9rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  flex: 0 0 auto;
  font-family: "Noto Serif JP", "Hiragino Mincho ProN", serif;
  font-size: .98rem;
  letter-spacing: .14em;
  text-decoration: none;
}

.utility-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .85rem;
  font-size: .72rem;
  color: var(--muted);
}

.utility-nav a {
  color: inherit;
  text-decoration: none;
}

.board-head {
  padding: 1.55rem 0 .8rem;
}

.board-name-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.board-name-row h1 {
  margin: 0;
  font-family: "Noto Serif JP", "Hiragino Mincho ProN", serif;
  font-size: 1.45rem;
  font-weight: 500;
  letter-spacing: .12em;
}

.theme-nav {
  display: flex;
  gap: 1.25rem;
  font-size: .85rem;
}

.theme-nav a {
  text-decoration: none;
  color: var(--muted);
  padding-bottom: .15rem;
}

.theme-nav a[aria-current="page"] {
  color: var(--text);
  border-bottom: 1px solid currentColor;
}

.board-actions {
  margin-top: 1rem;
  font-size: .82rem;
}

.board-actions a {
  text-underline-offset: .22em;
}

.disabled-link {
  color: var(--faint);
  pointer-events: none;
  text-decoration: none;
}

.board-note {
  margin: 0 0 .55rem;
  font-size: .7rem;
  color: var(--faint);
}

.thread-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.thread-item {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: .15rem;
  padding: .82rem 0 .9rem;
  border-bottom: 1px solid var(--line);
}

.thread-number {
  padding-top: .02rem;
  font-size: .88rem;
  color: var(--muted);
  text-align: right;
  padding-right: .45rem;
}

.thread-main {
  min-width: 0;
}

.thread-title {
  display: inline;
  font-size: .98rem;
  font-weight: 500;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.thread-title span {
  font-size: .82rem;
  font-weight: 400;
  color: var(--muted);
}

.thread-meta {
  margin-top: .18rem;
  font-size: .82rem;
  color: var(--text);
  overflow-wrap: anywhere;
}

.thread-item time {
  display: block;
  margin-top: .08rem;
  font-size: .7rem;
  color: var(--muted);
  letter-spacing: .02em;
}

.pagination {
  padding-top: 1.8rem;
  text-align: center;
  font-size: .84rem;
  line-height: 2.2;
}

.pagination > a {
  display: inline-block;
  min-width: 1.75rem;
  margin: 0 .08rem;
}

.pagination .current {
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.pagination .disabled {
  opacity: .32;
  pointer-events: none;
}

.edge-links {
  margin-top: .25rem;
  font-size: .76rem;
  color: var(--muted);
}

.edge-links a {
  color: inherit;
}

.board-footer {
  margin-top: 2.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: .72rem;
  color: var(--muted);
}

.board-footer a {
  color: inherit;
}

@media (max-width: 520px) {
  .board-shell {
    width: min(92vw, 720px);
    padding-top: 1.15rem;
  }

  .site-header {
    display: block;
  }

  .utility-nav {
    justify-content: flex-start;
    margin-top: .6rem;
    gap: .7rem;
  }

  .board-head {
    padding-top: 1.25rem;
  }

  .thread-item {
    grid-template-columns: 1.9rem minmax(0, 1fr);
    padding: .75rem 0 .82rem;
  }

  .thread-number {
    font-size: .8rem;
    padding-right: .3rem;
  }

  .thread-title {
    font-size: .95rem;
  }

  .thread-meta {
    font-size: .79rem;
  }
}


.empty-board {
  margin: 0;
  padding: 2.4rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
  font-size: .82rem;
  color: var(--muted);
}