:root {
  --bg: #f5f8fc;
  --surface: #ffffff;
  --surface-alt: #eef4ff;
  --border: #d9e2f0;
  --text: #18314f;
  --text-soft: #50627a;
  --brand: #274fac;
  --brand-dark: #1c397e;
  --accent: #548af7;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(21, 46, 89, 0.08);
  --max: 1080px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  font-family: "Fustat", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #edf4ff 0%, var(--bg) 220px, #ffffff 100%);
  color: var(--text);
}

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

img {
  max-width: 100%;
  display: block;
}

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

.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0 8px;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand-lockup img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
}

.brand-text strong {
  display: block;
  font-size: 16px;
}

.brand-text span {
  display: block;
  color: var(--text-soft);
  font-size: 13px;
}

.top-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
  font-size: 14px;
}

.hero {
  margin: 20px 0 28px;
  padding: 28px;
  border-radius: 24px;
  background: radial-gradient(circle at top right, rgba(84, 138, 247, 0.22), transparent 32%), var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(39, 79, 172, 0.08);
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 14px 0 12px;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.06;
}

.hero p {
  max-width: 780px;
  font-size: 18px;
  line-height: 1.65;
  color: var(--text-soft);
  margin: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 16px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
}

.button.primary {
  background: var(--brand);
  color: #fff;
}

.button.secondary {
  background: #fff;
  color: var(--brand);
  border-color: var(--border);
}

.breadcrumb {
  margin: 4px 0 0;
  color: var(--text-soft);
  font-size: 14px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}

.card {
  grid-column: span 6;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.card h2,
.card h3 {
  margin: 0 0 10px;
  font-size: 24px;
}

.card p,
.content-block p,
.content-block li {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-soft);
}

.content-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 22px 24px;
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}

.content-block h2 {
  margin: 0 0 12px;
  font-size: 28px;
}

.content-block ul {
  padding-left: 22px;
  margin: 10px 0 0;
}

.content-block li + li {
  margin-top: 8px;
}

.callout {
  background: var(--surface-alt);
  border-left: 4px solid var(--accent);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 14px;
}

.related-links a {
  font-size: 14px;
  font-weight: 600;
}

.topic-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.topic {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
}

.topic h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.topic p {
  margin: 0;
  font-size: 15px;
}

.footer {
  padding: 16px 0 40px;
  color: var(--text-soft);
  font-size: 14px;
}

@media (max-width: 860px) {
  .card {
    grid-column: span 12;
  }

  .top-nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .top-links {
    justify-content: flex-start;
  }

  .hero {
    padding: 22px;
  }
}