:root {
  color-scheme: dark;
  font-family: Inter, "Segoe UI", system-ui, sans-serif;
  --bg: #0b1226;
  --card: #121a33;
  --text: #eef3ff;
  --muted: #b4bdd6;
  --line: rgba(154, 186, 255, 0.12);
  --accent: #9ecbff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 80% 0, rgba(90, 216, 255, 0.12), transparent 32rem),
    radial-gradient(circle at 12% 100%, rgba(122, 91, 255, 0.14), transparent 28rem),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header, main, footer {
  width: min(760px, calc(100% - 32px));
  margin-inline: auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 0 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
  font-weight: 650;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

nav a, main a, footer a {
  color: var(--accent);
}

.language-link {
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 700;
}

main {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
}

.eyebrow {
  margin: 0 0 8px;
  color: #79d4ff;
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.14em;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(26px, 5vw, 34px);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1.12;
}

h2 {
  margin: 1.6em 0 0.5em;
  font-size: 18px;
  font-weight: 650;
}

.lead, .muted, .updated {
  color: var(--muted);
}

.updated { font-size: 12px; }

.notice {
  margin: 18px 0;
  padding: 14px 16px;
  border-left: 3px solid #79d4ff;
  border-radius: 0 10px 10px 0;
  background: rgba(121, 212, 255, 0.08);
}

.notice.warning {
  border-left-color: #f0b45a;
  background: rgba(240, 180, 90, 0.1);
}

.nothing-callout {
  margin: 0 0 12px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(121, 212, 255, 0.16);
  color: var(--text);
  font-size: 16px;
  line-height: 1.35;
}

.nothing-callout strong {
  font-weight: 750;
  letter-spacing: -0.02em;
}

code, kbd {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.9em;
}

.url {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.9em;
  color: #c5d4f5;
}

footer {
  padding: 22px 0 40px;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 620px) {
  header { flex-direction: column; align-items: flex-start; }
}