/* Shared header/nav styles for Discover 435 */

header {
  background: linear-gradient(135deg, var(--primary, #1e3a5f) 0%, var(--secondary, #3b82f6) 100%);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 1000;
}

header nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  flex-wrap: wrap;
  gap: 1rem;
}

header .logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: white;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

header .logo span {
  color: var(--accent, #7dd3fc);
}

header .logo img {
  height: 40px;
  width: 40px;
  border-radius: 6px;
  object-fit: cover;
  display: block;
}

header .nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
}

header .nav-links a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  transition: background 0.2s ease;
  display: inline-block;
}

header .nav-links a:hover,
header .nav-links a:focus-visible {
  background: rgba(255, 255, 255, 0.2);
  outline: none;
}

header .menu-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  font-size: 1.5rem;
  line-height: 1;
  padding: 0.4rem 0.7rem;
  border-radius: 6px;
  cursor: pointer;
}

@media (max-width: 768px) {
  header .menu-toggle {
    display: block;
  }

  header .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary-dark, var(--bg-card, #1e293b));
    flex-direction: column;
    padding: 1rem;
    gap: 0;
    z-index: 999;
  }

  header .nav-links.active {
    display: flex;
  }

  header .nav-links li {
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  header .nav-links li:last-child {
    border-bottom: none;
  }

  header .nav-links a {
    padding: 0.25rem 0;
  }
}

/* Shared internal-link modules for crawl depth and discovery */
.cross-hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.cross-hub-card {
  display: block;
  text-decoration: none;
  background: var(--bg-card, #1e293b);
  border: 1px solid rgba(125, 211, 252, 0.35);
  border-radius: 12px;
  padding: 1rem;
  color: var(--text, #f8fafc);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.cross-hub-card:hover,
.cross-hub-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--accent, #7dd3fc);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
  outline: none;
}

.cross-hub-card h3 {
  margin: 0 0 0.35rem;
  color: var(--accent, #7dd3fc);
  font-size: 1.02rem;
}

.cross-hub-card p {
  margin: 0;
  color: var(--text-muted, #cbd5e1);
  font-size: 0.93rem;
}