:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1f2328;
  --muted: #5b6470;
  --line: #e3e0d8;
  --accent: #1b5e4a;
  --accent-soft: #e6f0ec;
  --max: 60rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181b;
    --surface: #1c2024;
    --text: #e8e6e1;
    --muted: #a3abb4;
    --line: #2e343a;
    --accent: #7cc7ab;
    --accent-soft: #1f2f29;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Helvetica Neue", Arial, "Hiragino Sans", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  padding-inline: 1rem;
}
a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }

.wrap { max-width: var(--max); margin-inline: auto; }

header.site {
  border-bottom: 1px solid var(--line);
  padding-block: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: baseline;
  justify-content: space-between;
}
header.site .inst { color: var(--muted); font-size: 0.9rem; }
header.site nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; font-size: 0.9rem; }

.hero { padding-block: 2.5rem 1.5rem; }
.hero h1 { font-size: clamp(1.6rem, 4vw, 2.3rem); line-height: 1.25; margin: 0 0 0.5rem; letter-spacing: -0.01em; }
.hero .sub { color: var(--muted); margin: 0; }

.pi {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.25rem 2rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  padding: 1.25rem 1.5rem;
  margin-block: 1rem 2rem;
}
@media (min-width: 44rem) { .pi { grid-template-columns: 1.2fr 1fr; } }
.pi h2 { margin: 0 0 0.25rem; font-size: 1.25rem; }
.pi .role { margin: 0; }
.pi dl { margin: 0; display: grid; grid-template-columns: max-content 1fr; gap: 0.1rem 0.9rem; font-size: 0.95rem; }
.pi dt { color: var(--muted); }
.pi dd { margin: 0; overflow-wrap: anywhere; }

section { padding-block: 1.25rem; border-top: 1px solid var(--line); }
section h2 { font-size: 1.3rem; margin: 0 0 0.75rem; }
section h3 { font-size: 1.05rem; margin: 1.25rem 0 0.25rem; }
section p { margin: 0 0 0.75rem; }

.themes { display: grid; grid-template-columns: 1fr; gap: 1rem; margin: 0; padding: 0; list-style: none; }
@media (min-width: 44rem) { .themes { grid-template-columns: 1fr 1fr; } }
.themes li { background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 1rem 1.25rem; }
.themes h3 { margin-top: 0; }
.themes p { margin: 0; color: var(--text); }

.tag { display: inline-block; background: var(--accent-soft); color: var(--accent); border-radius: 999px; padding: 0 0.6rem; font-size: 0.8rem; margin-bottom: 0.4rem; }

ol.pubs, ul.plain { padding-left: 1.25rem; margin: 0; }
ol.pubs li, ul.plain li { margin-bottom: 0.5rem; }
.venue { color: var(--muted); }

.table-scroll { overflow-x: auto; }
table.members { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); font-size: 0.95rem; }
table.members th, table.members td { text-align: left; padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
table.members th { color: var(--muted); font-weight: 600; }
table.members td:nth-child(2) { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
table.members th:nth-child(2) { text-align: right; }

.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { display: grid; grid-template-columns: 5.5rem 1fr; gap: 0.75rem; padding-block: 0.3rem; border-bottom: 1px dashed var(--line); }
.timeline time { color: var(--muted); font-variant-numeric: tabular-nums; }

footer.site { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.85rem; padding-block: 1.5rem 2.5rem; }