:root {
  --bg: #fbf7f8;
  --card: #ffffff;
  --text: #2b2630;
  --muted: #6b6470;
  --accent: #b84a72;
  --line: #ecdfe4;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1b181d;
    --card: #26222a;
    --text: #f2ecef;
    --muted: #b3aab2;
    --accent: #f08fb0;
    --line: #3b3440;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #1b181d;
  --card: #26222a;
  --text: #f2ecef;
  --muted: #b3aab2;
  --accent: #f08fb0;
  --line: #3b3440;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

header.site {
  padding: 8px 0 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}

header.site a {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

nav.crumbs {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 8px;
}

nav.crumbs a { color: var(--accent); }

h1 {
  font-size: 24px;
  line-height: 1.4;
  margin: 0 0 8px;
}

h2 {
  font-size: 18px;
  margin: 32px 0 8px;
  padding-left: 10px;
  border-left: 4px solid var(--accent);
}

h3 {
  font-size: 16px;
  margin: 20px 0 4px;
}

p, li { margin: 8px 0; }

ul, ol { padding-left: 1.4em; }

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

.meta {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  margin: 12px 0;
}

.card a.title {
  font-weight: 700;
  font-size: 17px;
  text-decoration: none;
}

.muted { color: var(--muted); font-size: 14px; }

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}