:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #5d6678;
  --line: #dfe4ee;
  --brand: #6d3df4;
  --brand-dark: #4b24c8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

a {
  color: var(--brand-dark);
}

.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 960px;
  padding: 18px 24px;
}

.brand {
  color: var(--text);
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
}

.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.nav a[aria-current="page"] {
  color: var(--brand-dark);
  font-weight: 700;
}

.page {
  margin: 0 auto;
  max-width: 960px;
  padding: 36px 24px 56px;
}

.document {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 34px;
}

h1 {
  font-size: 34px;
  line-height: 1.18;
  margin: 0 0 10px;
}

.subtitle {
  color: var(--muted);
  font-size: 17px;
  margin: 0 0 16px;
}

.updated {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 30px;
}

h2 {
  font-size: 21px;
  margin: 30px 0 10px;
}

p {
  margin: 0 0 14px;
}

ul {
  margin: 0 0 18px 22px;
  padding: 0;
}

li {
  margin-bottom: 8px;
}

.note {
  background: #f2efff;
  border-left: 4px solid var(--brand);
  margin: 22px 0;
  padding: 14px 16px;
}

footer {
  color: var(--muted);
  font-size: 13px;
  margin-top: 26px;
  text-align: center;
}

@media (max-width: 640px) {
  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .document {
    padding: 24px 18px;
  }

  h1 {
    font-size: 28px;
  }
}