:root {
  color-scheme: dark light;
  --bg: #07152a;
  --panel: #0b1d33;
  --panel-soft: #102640;
  --text: #f5f7fa;
  --muted: #aab6c4;
  --line: rgba(255, 255, 255, .12);
  --accent: #67ead6;
  --max-width: 820px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

header, main, footer {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
}

header { padding: 56px 0 34px; }

.brand {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: .02em;
  margin-bottom: 28px;
  font-size: 1.05rem;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2.2rem, 7vw, 4rem);
  line-height: 1.05;
  letter-spacing: -.04em;
}

.lede {
  color: var(--muted);
  max-width: 680px;
  margin: 0;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 24px;
}

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

nav a {
  text-decoration: none;
  font-weight: 650;
}

main { padding: 8px 0 44px; }

article {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(22px, 5vw, 38px);
}

.updated {
  color: var(--muted);
  margin: 0 0 30px;
  font-size: .92rem;
}

h2 {
  margin: 30px 0 10px;
  font-size: 1.35rem;
  line-height: 1.3;
  letter-spacing: -.015em;
}

h2:first-of-type { margin-top: 0; }

p { margin: 0 0 15px; }

ul { margin: 8px 0 20px; padding-left: 1.35rem; }

li { margin: 6px 0; }

strong { color: #fff; }

.contact {
  padding: 16px 18px;
  background: var(--panel-soft);
  border-left: 4px solid var(--accent);
  border-radius: 0 10px 10px 0;
}

footer {
  color: var(--muted);
  padding: 0 0 48px;
  font-size: .9rem;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f7fa;
    --panel: #fff;
    --panel-soft: #edf8f6;
    --text: #172336;
    --muted: #607087;
    --line: #dce4ea;
    --accent: #08776e;
  }

  strong { color: var(--text); }
}

@media (max-width: 520px) {
  header, main, footer { width: min(calc(100% - 28px), var(--max-width)); }
  header { padding-top: 36px; }
}