:root {
  --bg: #f6f1e7;
  --paper: #fffdf8;
  --ink: #2a2622;
  --muted: #6b6259;
  --line: #e2d9c8;
  --accent: #2f4a6d;
  --accent-soft: #e6ecf3;
  --vermilion: #a8432c;
  --gold: #a3823f;
  --radius: 10px;
  --serif: "Shippori Mincho", "Yu Mincho", serif;
  --sans: "Noto Sans JP", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1a17;
    --paper: #24211d;
    --ink: #ece6dc;
    --muted: #a99f92;
    --line: #3a352e;
    --accent: #9db6d6;
    --accent-soft: #2a3340;
    --vermilion: #e08a72;
    --gold: #cfae6a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.9;
  overflow-wrap: anywhere;
}
a { color: var(--accent); }
img { max-width: 100%; height: auto; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

.unofficial {
  margin: 0;
  padding: 6px 16px;
  background: var(--ink);
  color: var(--bg);
  font-size: 12px;
  line-height: 1.6;
  text-align: center;
}

.site-header { background: var(--paper); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; padding-top: 14px; padding-bottom: 10px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.logo-mark {
  display: grid; place-items: center;
  width: 38px; height: 38px;
  border: 1.5px solid var(--vermilion);
  border-radius: 6px;
  color: var(--vermilion);
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1;
}
.logo-text { font-family: var(--serif); font-size: 20px; font-weight: 700; line-height: 1.2; }
.logo-text small { display: block; font-family: var(--sans); font-size: 11px; font-weight: 400; color: var(--muted); letter-spacing: .04em; }
.gnav ul { display: flex; flex-wrap: wrap; gap: 2px 14px; margin: 0; padding: 0; list-style: none; font-size: 14px; }
.gnav a { color: var(--ink); text-decoration: none; }
.gnav a:hover { color: var(--accent); text-decoration: underline; }
@media (max-width: 640px) {
  .gnav { width: 100%; }
  .gnav ul { flex-wrap: nowrap; overflow-x: auto; white-space: nowrap; gap: 0 16px; padding-bottom: 4px; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
}

.main { padding-top: 18px; padding-bottom: 56px; }
.crumb { font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.crumb a { color: var(--muted); }
.ad-note { font-size: 12px; color: var(--muted); margin: 0 0 12px; }
.content { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 22px 32px; }
@media (max-width: 480px) { .content { padding: 22px 16px 26px; } }

.content h1 { font-family: var(--serif); font-size: 27px; line-height: 1.45; margin: 0 0 18px; letter-spacing: .02em; }
.content h2 {
  font-family: var(--serif); font-size: 21px; line-height: 1.5;
  margin: 44px 0 14px; padding: 0 0 8px;
  border-bottom: 2px solid var(--ink);
}
.content h3 { font-size: 17px; margin: 30px 0 8px; padding-left: 10px; border-left: 4px solid var(--vermilion); line-height: 1.5; }
.content p { margin: 0 0 1.1em; }
.content ul, .content ol { padding-left: 1.4em; margin: 0 0 1.2em; }
.content li { margin-bottom: .3em; }
.content strong { background: linear-gradient(transparent 62%, rgba(163,130,63,.28) 62%); }
.content blockquote { margin: 0 0 1.2em; padding: 12px 16px; background: var(--accent-soft); border-radius: 8px; }
.content blockquote p:last-child { margin-bottom: 0; }
.content hr { border: 0; border-top: 1px dashed var(--line); margin: 32px 0; }
.lead { font-size: 17px; }

.table-wrap { overflow-x: auto; margin: 0 0 8px; -webkit-overflow-scrolling: touch; }
.content table { border-collapse: collapse; width: 100%; font-size: 14px; line-height: 1.6; }
.content table.compare { min-width: 640px; }
.content th, .content td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.content thead th { background: var(--accent-soft); font-weight: 700; white-space: nowrap; }
.compare th small { display: block; font-weight: 400; color: var(--muted); font-size: 12px; }
.source-note { font-size: 12px; color: var(--muted); }

.btn {
  display: inline-block;
  padding: 10px 18px;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.4;
}
@media (prefers-color-scheme: dark) { .btn { color: #14181e; } }
.btn:hover { opacity: .88; }
.btn-sm { padding: 6px 12px; font-size: 13px; white-space: nowrap; }
.pr { display: inline-block; margin-left: 6px; padding: 0 5px; border: 1px solid currentColor; border-radius: 3px; font-size: 10px; font-weight: 400; vertical-align: 1px; }

.official {
  margin: 18px 0 24px;
  padding: 16px 18px;
  border: 1.5px solid var(--gold);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--gold) 8%, var(--paper));
}
.official-label { font-weight: 700; margin: 0 0 6px; }
.official ul { margin: 0 0 8px; }
.official-note { font-size: 13px; color: var(--muted); margin: 0; }

.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin: 0 0 18px; background: var(--bg); }
.card h3 { margin: 0 0 10px; padding: 0; border: 0; font-size: 18px; }
.card h3 small { display: block; font-size: 12px; font-weight: 400; color: var(--muted); }
.card dl { display: grid; grid-template-columns: 7.5em 1fr; gap: 4px 10px; margin: 0 0 10px; font-size: 14px; line-height: 1.7; }
.card dt { color: var(--muted); }
.card dd { margin: 0; }
.card-cta { margin: 6px 0 0; }
.item-kind { font-size: 12px; color: var(--vermilion); margin: 0 0 2px; font-weight: 700; }
.item-by { font-size: 13px; color: var(--muted); margin: -6px 0 8px; }

.steps { counter-reset: step; list-style: none; padding-left: 0 !important; }
.steps > li { counter-increment: step; position: relative; padding-left: 44px; margin-bottom: 14px; }
.steps > li::before {
  content: counter(step);
  position: absolute; left: 0; top: 2px;
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--ink); color: var(--bg);
  display: grid; place-items: center;
  font-size: 14px; font-weight: 700; line-height: 1;
}

.three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 0 0 24px; }
@media (max-width: 640px) { .three { grid-template-columns: 1fr; } }
.three a { display: block; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); color: var(--ink); text-decoration: none; }
.three a:hover { border-color: var(--accent); }
.three b { display: block; font-family: var(--serif); font-size: 18px; margin-bottom: 4px; }
.three span { display: block; font-size: 13px; color: var(--muted); line-height: 1.7; }

.article-group h2 { font-size: 19px; }
.article-list { padding-left: 1.2em; }
.article-list li { margin-bottom: .5em; }
.template-preview { margin: 0 0 14px; }
.template-preview img { display: block; width: 100%; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.template-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.btn-ghost { background: transparent; color: var(--accent); border: 1.5px solid var(--accent); cursor: pointer; font-family: inherit; }
@media (prefers-color-scheme: dark) { .btn-ghost { color: var(--accent); } }
.same-cat { margin-top: 32px; }
.related { margin-top: 40px; padding-top: 18px; border-top: 1px solid var(--line); }
.related-label { font-weight: 700; margin: 0 0 6px; }
.updated { margin: 32px 0 0; font-size: 12px; color: var(--muted); text-align: right; }

.site-footer { border-top: 1px solid var(--line); background: var(--paper); padding: 28px 0 36px; font-size: 13px; color: var(--muted); }
.footer-name { font-family: var(--serif); font-size: 17px; color: var(--ink); margin: 0 0 8px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 4px 18px; padding: 0; margin: 0 0 12px; list-style: none; }
.footer-links a { color: var(--muted); }
.footer-note { line-height: 1.7; }
.copy { margin: 12px 0 0; }