:root {
  --bg: #faf9f6;
  --fg: #1d1c1a;
  --muted: #6b6862;
  --line: #e4e1da;
  --accent: #9a4a1c;
  --card: #ffffff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161514;
    --fg: #ebe8e2;
    --muted: #a19d95;
    --line: #2e2c29;
    --accent: #e3a072;
    --card: #1e1d1b;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", "Noto Sans CJK JP", "Yu Gothic UI", "Yu Gothic", Meiryo, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  font-feature-settings: "palt" 0;
  line-break: strict;
  overflow-wrap: anywhere;
}
:lang(en) { letter-spacing: 0; line-height: 1.65; overflow-wrap: break-word; }
a { color: var(--accent); text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
header.site, main, footer.site {
  max-width: 40rem;
  margin: 0 auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}
header.site { padding-top: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--line); }
.brand {
  color: var(--fg);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
}
main { padding-top: 1.5rem; padding-bottom: 3rem; }
footer.site {
  border-top: 1px solid var(--line);
  padding-top: 1.25rem; padding-bottom: 2.5rem;
  color: var(--muted); font-size: 0.85rem;
}
footer.site p { margin: 0.2rem 0; }
h1 { font-size: 1.6rem; line-height: 1.4; margin: 0.5rem 0 1rem; font-weight: 700; letter-spacing: 0.04em; }
h2 { font-size: 1.1rem; line-height: 1.5; margin: 2.5rem 0 0.75rem; font-weight: 700; }
h3 { font-size: 1rem; margin: 1.75rem 0 0.5rem; }
p { margin: 0 0 1rem; }
ul { padding-left: 1.25rem; margin: 0 0 1rem; }
li { margin: 0.35rem 0; }
.crumbs { font-size: 0.8rem; color: var(--muted); margin-bottom: 0.5rem; }
.crumbs a { color: var(--muted); }
.lead { font-size: 1.05rem; }
.intro p { max-width: 34em; }
.meta { color: var(--muted); font-size: 0.85rem; }
.summary {
  border-left: 3px solid var(--accent);
  padding: 0.25rem 0 0.25rem 1rem;
  margin: 1.5rem 0 2rem;
}
.note { color: var(--muted); font-size: 0.9rem; }
.contact { font-size: 1.1rem; font-weight: 600; }
ul.apps, ul.links { list-style: none; padding: 0; }
ul.apps li { margin: 0; border-top: 1px solid var(--line); }
ul.apps li:last-child { border-bottom: 1px solid var(--line); }
ul.apps a {
  display: block; padding: 1rem 0.25rem; text-decoration: none; color: var(--fg);
}
ul.apps a:hover .app-name { color: var(--accent); }
.app-name { display: block; font-weight: 700; font-size: 1.1rem; }
.app-desc { display: block; color: var(--muted); font-size: 0.92rem; }
ul.links li { margin: 0.5rem 0; }
details {
  border-top: 1px solid var(--line);
  padding: 0.85rem 0;
}
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 600; list-style-position: outside; margin-left: 1rem; }
details p { margin: 0.75rem 0 0 1rem; }
section.en { margin-top: 3.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
section.en h2 { margin-top: 0; }
@media (min-width: 48rem) {
  body { font-size: 17px; }
  h1 { font-size: 2rem; }
  main { padding-top: 2.5rem; }
}
p.links { margin-top: 1.5rem; }