:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #dbeafe;
  --blue: #1e3a8a;
  --green: #059669;
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.09);
  --radius: 16px;
  --container: 960px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(circle at 10% 0%, #dbeafe 0%, #f8fafc 32%, #f8fafc 100%);
  color: var(--text);
  line-height: 1.6;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
}

.topbar-wrap {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  color: var(--blue);
  font-weight: 800;
  text-decoration: none;
}

.nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.nav a {
  color: #0f172a;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

main { padding: 28px 0 52px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

h1 {
  margin: 0 0 12px;
  line-height: 1.2;
  font-size: clamp(28px, 3.3vw, 40px);
}

h2 {
  margin: 24px 0 10px;
  line-height: 1.25;
  font-size: clamp(22px, 2.3vw, 30px);
}

p {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 16px;
}

ul {
  margin: 0 0 12px;
  padding-left: 20px;
  color: var(--muted);
}

ol {
  margin: 0 0 12px;
  padding-left: 20px;
  color: var(--muted);
}

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

.cta {
  margin-top: 18px;
  display: inline-flex;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--green) 100%);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  padding: 12px 18px;
}

.meta {
  color: #64748b;
  font-size: 14px;
  margin-bottom: 14px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

footer {
  border-top: 1px solid var(--line);
  background: #0f172a;
  color: #cbd5e1;
  padding: 24px 0;
}

footer p {
  color: #cbd5e1;
  margin: 0;
  font-size: 14px;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}