:root {
  color-scheme: dark;
  --text: #f0f1f3;
  --muted: #9aa0aa;
  --line: #26262b;
  --accent: #7c9cff;
  --bg: #08080a;
  --panel: #121214;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.85;
}
.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}
header {
  border-bottom: 1px solid var(--line);
  background: #0d0d10;
}
header .wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  max-width: 760px;
}
header a { color: var(--text); text-decoration: none; font-weight: 800; letter-spacing: .06em; }
header nav { margin-left: auto; display: flex; gap: 14px; font-size: 13px; }
header nav a { color: var(--muted); font-weight: 500; }
main {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px 30px;
  margin-top: 24px;
}
h1 { font-size: 22px; margin: 0 0 4px; letter-spacing: .01em; }
h2 { font-size: 16px; margin: 28px 0 8px; padding-top: 8px; border-top: 1px solid var(--line); }
h2:first-of-type { border-top: 0; padding-top: 0; }
p, li { font-size: 14.5px; }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }
.meta { color: var(--muted); font-size: 12.5px; margin-bottom: 18px; }
.note {
  background: rgba(124, 156, 255, 0.12);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 13.5px;
}
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px;
  background: #1e1e24;
  padding: 2px 5px;
  border-radius: 4px;
  word-break: break-all;
}
pre {
  background: #000;
  color: #e6e9ef;
  border: 1px solid var(--line);
  padding: 12px 14px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.6;
}
pre code { background: none; padding: 0; color: inherit; }
a { color: var(--accent); }
footer { margin-top: 28px; text-align: center; font-size: 12px; color: var(--muted); }