:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1c1b19;
  --muted: #5f5c55;
  --line: #e7e3da;
  --accent: #3b3bd6;
  --accent-soft: #eef0ff;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121211;
    --surface: #1b1b19;
    --text: #efede8;
    --muted: #a9a59c;
    --line: #2d2c29;
    --accent: #9aa2ff;
    --accent-soft: #1f2140;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #121211;
  --surface: #1b1b19;
  --text: #efede8;
  --muted: #a9a59c;
  --line: #2d2c29;
  --accent: #9aa2ff;
  --accent-soft: #1f2140;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); text-underline-offset: 3px; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

header.site {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
  font-size: 19px;
}

.brand span { color: var(--accent); }

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 18px;
  font-size: 15px;
}

nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current="page"] { color: var(--text); }

main { padding: 48px 0 64px; }

h1 {
  font-size: clamp(30px, 6vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
}

h2 {
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 40px 0 8px;
  scroll-margin-top: 24px;
}

h3 { font-size: 17px; margin: 24px 0 4px; }

p, li { color: var(--text); }
.lead { font-size: 20px; color: var(--muted); max-width: 620px; }
.muted { color: var(--muted); font-size: 15px; }

ul { padding-left: 22px; }
li { margin: 4px 0; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
  margin: 32px 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}

.card strong { display: block; margin-bottom: 4px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.note {
  background: var(--accent-soft);
  border-radius: 12px;
  padding: 16px 18px;
  margin: 24px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin: 12px 0;
  display: block;
  overflow-x: auto;
}

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th { color: var(--muted); font-weight: 600; }

footer.site {
  border-top: 1px solid var(--line);
  padding: 24px 0 40px;
  color: var(--muted);
  font-size: 14px;
}

footer.site .wrap { display: flex; gap: 18px; flex-wrap: wrap; justify-content: space-between; }
footer.site a { color: var(--muted); }

.lang { font-size: 14px; color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }