:root {
  color-scheme: light dark;
  --bg: #f7f8fb;
  --surface: #ffffff;
  --text: #1b2533;
  --muted: #526174;
  --line: #d9e0ea;
  --accent: #285fa8;
  --accent-strong: #1f497f;
  --soft: #eef4fb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  background: var(--bg);
  color: var(--text);
  overflow-wrap: anywhere;
}

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

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

.nav {
  max-width: 980px;
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

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

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

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

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

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 42px 20px 64px;
}

.hero {
  display: grid;
  gap: 16px;
  margin-bottom: 28px;
}

.eyebrow {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0;
  margin: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: 34px;
  line-height: 1.15;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.25;
}

p {
  margin: 0 0 12px;
}

p:last-child {
  margin-bottom: 0;
}

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

li + li {
  margin-top: 6px;
}

code {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 2px 5px;
}

.lede {
  margin: 0;
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  margin: 18px 0;
}

.callout {
  background: var(--soft);
  border-color: #bdd3ee;
}

.meta {
  color: var(--muted);
  font-size: 14px;
}

.button-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 2px;
}

.button {
  display: inline-block;
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 10px 14px;
  color: #ffffff;
  background: var(--accent);
  text-decoration: none;
  font-weight: 700;
}

.button.secondary {
  color: var(--accent-strong);
  background: transparent;
}

.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: var(--surface);
}

.footer-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px;
  font-size: 14px;
}

@media (max-width: 640px) {
  main {
    padding-top: 30px;
  }

  h1 {
    font-size: 28px;
  }

  .lede {
    font-size: 16px;
  }

  .panel {
    padding: 18px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111821;
    --surface: #172231;
    --text: #ecf2f8;
    --muted: #b7c4d2;
    --line: #304154;
    --accent: #75a7f0;
    --accent-strong: #a9caff;
    --soft: #172d47;
  }

  .button {
    color: #07111f;
  }
}