:root {
  color-scheme: light;
  --bg: #f7f9fc;
  --paper: #ffffff;
  --text: #172033;
  --muted: #5c6b82;
  --line: #dce4ee;
  --accent: #2563eb;
  --accent-soft: #eaf1ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, #edf4ff 0, transparent 34rem),
    linear-gradient(180deg, #ffffff 0, var(--bg) 32rem);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.72;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

.site {
  max-width: 960px;
  margin: 0 auto;
  padding: 28px 22px 72px;
}

.topbar {
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 42px;
}

.brand {
  color: var(--text);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0;
  text-decoration: none;
}

.nav {
  display: flex;
  gap: 18px;
}

.nav a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.hero {
  max-width: 760px;
  margin: 54px 0 40px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0 0 14px;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.1rem, 6vw, 4rem);
  line-height: 1.04;
  letter-spacing: 0;
  margin: 0 0 22px;
}

h2 {
  font-size: 1.35rem;
  line-height: 1.25;
  margin: 42px 0 12px;
}

p {
  margin: 0 0 18px;
}

.lead {
  color: var(--muted);
  font-size: 1.12rem;
  margin-bottom: 30px;
}

.post-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 28px;
}

.post-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 50px rgba(35, 48, 74, 0.07);
  display: block;
  padding: 24px;
  text-decoration: none;
}

.post-card h2 {
  color: var(--text);
  font-size: 1.25rem;
  margin: 10px 0 10px;
}

.post-card p {
  color: var(--muted);
  margin: 0;
}

.meta {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

article {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 24px 70px rgba(35, 48, 74, 0.08);
  margin: 0 auto;
  max-width: 820px;
  padding: 42px;
}

.callout {
  background: var(--accent-soft);
  border: 1px solid #cfe0ff;
  border-radius: 14px;
  color: #1e3a8a;
  margin: 34px 0;
  padding: 20px 22px;
}

.footer {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 34px;
  text-align: center;
}

@media (max-width: 640px) {
  .site {
    padding: 22px 14px 48px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    margin-bottom: 28px;
  }

  .hero {
    margin-top: 32px;
  }

  article {
    border-radius: 14px;
    padding: 28px 20px;
  }
}