:root {
  --bg: #f8f9fb;
  --surface: #ffffff;
  --text: #16171d;
  --muted: #5d606d;
  --line: #e4e6ee;
  --accent: #4f48d8;
  --accent-soft: #eceafe;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111217;
    --surface: #181a21;
    --text: #eceef4;
    --muted: #9a9daa;
    --line: #2a2d38;
    --accent: #9d98ff;
    --accent-soft: #24233f;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-underline-offset: 2px; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 600; font-size: 17px; }
.brand img { width: 30px; height: 30px; }
nav a { color: var(--muted); text-decoration: none; margin-left: 20px; font-size: 15px; }
nav a:hover, nav a[aria-current="page"] { color: var(--text); }
.hero { padding: 72px 0 40px; }
.hero h1 { font-size: clamp(34px, 6vw, 52px); line-height: 1.08; letter-spacing: -0.02em; margin: 0 0 18px; }
.hero p { font-size: 19px; color: var(--muted); margin: 0; max-width: 560px; }
.status {
  display: inline-block;
  margin-top: 26px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
}
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; padding: 24px 0 56px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
.card h2 { font-size: 16px; margin: 0 0 6px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
kbd {
  font: 12px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 2px 5px;
  background: var(--bg);
}
article { padding: 40px 0 64px; }
article h1 { font-size: 34px; letter-spacing: -0.01em; margin: 0 0 6px; }
article .meta { color: var(--muted); margin: 0 0 32px; }
article h2 { font-size: 20px; margin: 36px 0 10px; }
article p, article li { color: var(--text); }
article ul { padding-left: 22px; }
article li + li { margin-top: 6px; }
.note { background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 10px; padding: 14px 16px; }
footer.site { border-top: 1px solid var(--line); padding: 24px 0 40px; color: var(--muted); font-size: 14px; display: flex; gap: 18px; flex-wrap: wrap; }
footer.site a { color: var(--muted); }