:root {
  --bg: #FFFCF3;
  --ink: #2A1612;
  --muted: #8A8480;
  --main: #420F0E;
  --accent: #E6D97B;
  --line: #E8E3DE;
  --link: #8A2A22;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1E1413;
    --ink: #F3ECE6;
    --muted: #B4ABA5;
    --main: #5A1E1C;
    --accent: #E6D97B;
    --line: #3A2C2A;
    --link: #F0B8A8;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}
header {
  background: var(--main);
  color: #fff;
  border-bottom: 3px solid var(--accent);
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }
header .wrap { display: flex; align-items: center; gap: 14px; padding-top: 18px; padding-bottom: 18px; }
header img { width: 56px; height: 56px; border-radius: 13px; }
header a { color: inherit; text-decoration: none; }
header .name { font-size: 22px; font-weight: 700; letter-spacing: .04em; }
header .tag { font-size: 13px; opacity: .8; }
nav { border-bottom: 1px solid var(--line); }
nav .wrap { display: flex; gap: 20px; padding-top: 10px; padding-bottom: 10px; font-size: 14px; }
nav a { color: var(--link); text-decoration: none; }
nav a[aria-current] { color: var(--ink); font-weight: 700; }
main { padding: 8px 0 40px; }
h1 { font-size: 24px; margin: 28px 0 8px; }
h2 { font-size: 18px; margin: 32px 0 6px; padding-left: 10px; border-left: 4px solid var(--main); }
@media (prefers-color-scheme: dark) { h2 { border-left-color: var(--accent); } }
p, li { font-size: 15px; }
ul { padding-left: 1.3em; }
a { color: var(--link); }
.mail { font-size: 17px; font-weight: 700; word-break: break-all; }
.muted { color: var(--muted); font-size: 13px; }
dl.faq dt { font-weight: 700; margin-top: 18px; }
dl.faq dd { margin: 4px 0 0; }
footer { border-top: 1px solid var(--line); padding: 18px 0 28px; color: var(--muted); font-size: 12px; }