:root {
  --ink: #1e1b3a;
  --sub: #52527a;
  --line: #e7e5f5;
  --accent: #1a5f7a;
  --bg: #ffffff;
  --card: #f7f7fc;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 48px 24px 96px; }
header.brand { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
header.brand .id { display: flex; align-items: center; gap: 12px; text-decoration: none; }
header.brand img { width: 36px; height: 36px; }
header.brand .id span { font-weight: 800; font-size: 1.25rem; letter-spacing: -0.02em; color: var(--ink); }
header.brand a.back { color: var(--accent); font-size: 0.9rem; text-decoration: none; font-weight: 600; }
header.brand a.back:hover { text-decoration: underline; }
h1 { font-size: 1.9rem; margin: 24px 0 4px; letter-spacing: -0.02em; }
.updated { color: var(--sub); font-size: 0.9rem; margin-bottom: 40px; }
h2 { font-size: 1.15rem; margin: 40px 0 12px; color: var(--accent); }
p, li { color: var(--ink); font-size: 0.97rem; }
ul { padding-left: 1.2rem; }
li { margin-bottom: 6px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px 24px; margin: 16px 0; }
a { color: var(--accent); }
footer.page-footer { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--sub); font-size: 0.85rem; }
details.faq { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 4px 24px; margin: 12px 0; }
details.faq summary { cursor: pointer; font-weight: 700; padding: 16px 0; list-style: none; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; float: right; color: var(--accent); font-weight: 400; }
details.faq[open] summary::after { content: "\2212"; }
details.faq p { padding-bottom: 16px; margin: 0; }
.contact-box { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 24px; text-align: center; margin: 24px 0; }
.contact-box a.email { font-size: 1.2rem; font-weight: 700; }