:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1a1a2e;
  --muted: #5c6370;
  --link: #3366ff;
  --border: #e3e8f4;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
}

header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

header .wrap,
main,
footer .wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 24px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 8px;
}

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

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}

main {
  background: var(--card);
  margin: 16px auto 32px;
  border: 1px solid var(--border);
  border-radius: 16px;
}

h1 {
  font-size: 1.8rem;
  margin: 0 0 8px;
}

h2 {
  font-size: 1.2rem;
  margin: 28px 0 10px;
}

h3 {
  font-size: 1.05rem;
  margin: 20px 0 8px;
}

p,
li {
  color: var(--text);
}

.lede,
.meta,
footer {
  color: var(--muted);
}

.meta {
  margin: 0 0 20px;
}

ul {
  padding-left: 1.2rem;
}

.cta {
  display: inline-block;
  margin: 8px 8px 0 0;
  padding: 10px 14px;
  border-radius: 10px;
  background: #3366ff;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}

.cta.secondary {
  background: #eef2ff;
  color: #274bdb;
}

footer {
  font-size: 0.92rem;
}