:root {
  --bg: #ffffff;
  --surface: #f8fafc;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --accent: #4f46e5;
  --accent-dark: #4338ca;
  --max: 720px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--accent-dark);
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background-color: rgba(255, 255, 255, 0.92);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 0.85rem;
}

.site-nav {
  display: flex;
  gap: 8px;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.95rem;
  transition: color 0.15s, background 0.15s;
}

.site-nav a:hover {
  color: var(--text);
  background: var(--surface);
}

main {
  padding: 56px 0 80px;
}

.hero {
  padding: 24px 0 8px;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.hero .lede {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0;
}

article h1 {
  font-size: 2.25rem;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
  font-weight: 700;
}

article header {
  margin-bottom: 40px;
}

article header .meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

article h2 {
  font-size: 1.4rem;
  margin: 40px 0 14px;
  letter-spacing: -0.015em;
  font-weight: 600;
}

article h3 {
  font-size: 1.05rem;
  margin: 24px 0 6px;
  font-weight: 600;
}

article p, article ul, article ol {
  margin: 0 0 14px;
}

article ul, article ol {
  padding-left: 22px;
}

article li {
  margin: 4px 0;
}

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 40px 0;
}

@media (min-width: 640px) {
  .cards {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  background: var(--bg);
}

.card-eyebrow {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 8px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 80px;
  padding: 32px 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer .footer-links {
  display: flex;
  gap: 18px;
}

.site-footer a {
  color: var(--muted);
}

.site-footer a:hover {
  color: var(--text);
}