:root {
  --bg: #09111f;
  --line: rgba(255, 255, 255, 0.12);
  --card: rgba(13, 25, 42, 0.78);
  --text: #f4f1ea;
  --muted: #b4becd;
  --primary: #ff6b2c;
  --accent: #74d3ae;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.25);
  --body-font: "Avenir Next", "Segoe UI", "PingFang SC", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  font-family: var(--body-font);
  background:
    radial-gradient(circle at top left, rgba(255, 107, 44, 0.18), transparent 28%),
    radial-gradient(circle at 80% 20%, rgba(116, 211, 174, 0.16), transparent 22%),
    linear-gradient(160deg, #07101d 0%, #0e1829 55%, #182235 100%);
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.4), transparent 85%);
}

.site-shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  padding: 24px 0 28px;
}

.nav {
  display: flex;
  align-items: center;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(9, 17, 31, 0.62);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 18px;
  color: #08111e;
  font-size: 1.6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), #ffcf8c);
}

.brand-text strong {
  font-size: 2rem;
  font-weight: 800;
}

.navigation-page {
  padding: 6px 0 48px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.nav-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 220px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  color: var(--text);
  text-decoration: none;
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.nav-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.22);
}

.nav-card-primary {
  background:
    linear-gradient(180deg, rgba(255, 107, 44, 0.12), rgba(13, 25, 42, 0.8)),
    var(--card);
}

.card-tag {
  display: inline-flex;
  align-self: flex-start;
  margin-bottom: 28px;
  padding: 8px 14px;
  border-radius: 999px;
  color: #08111e;
  font-size: 0.88rem;
  font-weight: 700;
  background: var(--accent);
}

.nav-card h1,
.nav-card h2 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1;
}

.nav-card h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.3rem);
}

.nav-card p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 20px, 1200px);
  }

  .brand-text strong {
    font-size: 1.55rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .nav-card {
    min-height: 180px;
  }
}