:root {
  --bg: #f6f7f9;
  --fg: #14171c;
  --muted: #5b6370;
  --card: #ffffff;
  --line: #e3e6eb;
  --accent: #d6452b;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116;
    --fg: #e8ebf0;
    --muted: #9aa3b0;
    --card: #161a21;
    --line: #262c36;
    --accent: #ff6a4d;
  }
}

* { box-sizing: border-box; }

html[data-lang="en"] [lang="uk"],
html[data-lang="uk"] [lang="en"] { display: none; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); }

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

header.bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}

.brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
  text-decoration: none;
}

.lang button {
  background: none;
  border: 1px solid var(--line);
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
}

.lang button[aria-pressed="true"] {
  color: var(--fg);
  border-color: var(--fg);
}

.hero h1 {
  font-size: clamp(32px, 7vw, 48px);
  line-height: 1.1;
  margin: 0 0 16px;
}

.hero p { font-size: 18px; color: var(--muted); margin: 0 0 24px; }

.note {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 16px;
  margin: 32px 0;
}

.contact {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
}

.contact h2 { margin: 0 0 8px; font-size: 20px; }

.doc h1 { font-size: 32px; margin: 0 0 4px; }
.doc h2 { font-size: 20px; margin: 32px 0 8px; }
.doc .date { color: var(--muted); margin: 0 0 24px; }

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

footer a { color: var(--muted); }

.note p, .contact p { margin: 0; }