:root {
  color-scheme: light dark;
  --bg: #faf8f4;
  --fg: #1a1a1a;
  --muted: #666;
  --border: #ddd;
  /* ソース色: 色相 --h はインラインで指定される */
  --src-sat: 72%;
  --src-lit: 34%;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181d;
    --fg: #e8e6e1;
    --muted: #9a9a9a;
    --border: #333;
    --src-sat: 68%;
    --src-lit: 70%;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  line-height: 1.7;
}

.wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

header.site {
  border-bottom: 3px double var(--fg);
  margin-bottom: 2rem;
  padding-bottom: 0.75rem;
}
header.site .brand {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  margin: 0;
}
header.site .brand a { color: inherit; text-decoration: none; }
header.site .tagline {
  margin: 0.25rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.date {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0 0 0.5rem;
}
.date .method {
  float: right;
  font-size: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.1em 0.8em;
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
}

h1.headline {
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1.5;
  margin: 0 0 2rem;
}
h1.headline .seg {
  color: hsl(var(--h) var(--src-sat) var(--src-lit));
}

.sources h2 {
  font-size: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3rem;
  letter-spacing: 0.1em;
}
.sources p.note {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0;
}
.sources ul {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 0.9rem;
}
.sources li { margin: 0.45rem 0; }
.sources a {
  color: hsl(var(--h) var(--src-sat) var(--src-lit));
  text-decoration-color: hsl(var(--h) var(--src-sat) var(--src-lit) / 0.45);
  text-underline-offset: 3px;
}
.sources a:hover { text-decoration-thickness: 2px; }
.sources .swatch {
  display: inline-block;
  width: 0.65em;
  height: 0.65em;
  border-radius: 50%;
  margin-right: 0.5em;
  background: hsl(var(--h) var(--src-sat) var(--src-lit));
}

nav.pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
}
nav.pager a { color: inherit; }
nav.pager .center { color: var(--muted); }

.archive ul {
  list-style: none;
  padding: 0;
}
.archive li {
  margin: 0.8rem 0;
}
.archive .adate {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
}
.archive a { color: inherit; }

footer.site {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 3px double var(--fg);
  font-size: 0.75rem;
  color: var(--muted);
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
}
footer.site a { color: inherit; }