:root {
  --bg: #F8F7F3;
  --ink: #23211D;
  --ink-soft: #75716A;
  --ink-faint: #A9A49B;
  --hairline: #E5E2DA;
  --card: #FFFFFF;
  --accent: #B4342C;
  --accent-text: #FBF6F0;
  --font-mark: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", Georgia, serif;
  --font-ui: -apple-system, "Segoe UI", system-ui, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161619;
    --ink: #EAE8E1;
    --ink-soft: #918D85;
    --ink-faint: #5C5952;
    --hairline: #2A2A2F;
    --card: #1D1D21;
    --accent: #C8443C;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ui);
  line-height: 1.65;
  padding: 48px 20px 80px;
}

.wrap { max-width: 680px; margin: 0 auto; }

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 34px;
  text-decoration: none;
  color: inherit;
}

.mark {
  background: var(--accent);
  color: var(--accent-text);
  font-family: var(--font-mark);
  font-size: 20px;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  flex-shrink: 0;
}

.brand-name { font-size: 15px; font-weight: 600; }

.brand-sub {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

h1 {
  font-size: 26px;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.updated {
  font-size: 13px;
  color: var(--ink-faint);
  margin-bottom: 34px;
}

h2 {
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 34px 0 12px;
  padding-top: 22px;
  border-top: 1px solid var(--hairline);
}

p { margin-bottom: 14px; }

ul { margin: 0 0 14px 0; padding-left: 0; list-style: none; }

li { position: relative; padding-left: 18px; margin-bottom: 8px; }

li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 11px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

a { color: var(--accent); text-underline-offset: 2px; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.92em;
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 1px 5px;
}

.callout {
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 16px 18px;
  margin-bottom: 16px;
}

.callout p:last-child { margin-bottom: 0; }

strong { font-weight: 600; }

footer {
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid var(--hairline);
  font-size: 12px;
  color: var(--ink-faint);
}

/* Index / hub pages */

.card-list { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }

.card-link {
  display: block;
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 14px 16px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease;
}

.card-link:hover { border-color: var(--accent); }

.card-title { display: block; font-size: 14px; font-weight: 600; margin-bottom: 2px; }

.card-desc { display: block; font-size: 12.5px; color: var(--ink-soft); }