/* Grid and layout helpers */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.split {
  display: grid;
  gap: var(--space-xl);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
}

.section-tight { padding: var(--space-2xl) 0; }

@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .split { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
  z-index: 999;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  height: var(--header-height);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.08rem;
  color: var(--primary);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--text-dark);
  font-weight: 700;
  letter-spacing: 0.01em;
  padding: var(--space-sm) var(--space-sm);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--primary);
  background-color: rgba(59, 130, 246, 0.08);
}

.nav-item {
  position: relative;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.14);
  min-width: 240px;
  padding: var(--space-sm) 0;
  display: none;
}

.nav-dropdown a {
  display: block;
  padding: var(--space-sm) var(--space-lg);
  color: var(--text-dark);
  font-weight: 500;
}

.nav-dropdown a:hover {
  background: rgba(59, 130, 246, 0.08);
  color: var(--primary);
}

.nav-item:focus-within .nav-dropdown,
.nav-item:hover .nav-dropdown,
.nav-item.open .nav-dropdown {
  display: block;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-sm);
}

@media (max-width: 1024px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-links {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border);
    display: none;
  }

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

  .nav-item {
    width: 100%;
  }

  .nav-dropdown {
    position: static;
    border: 0;
    box-shadow: none;
    background: transparent;
    padding: 0 0 0 var(--space-md);
  }

  .nav-dropdown a {
    padding-left: 0;
  }
}

/* Footer */
.site-footer {
  background: #0B1939;
  color: #E2E8F0;
  padding: var(--space-3xl) 0 var(--space-2xl);
}

.site-footer h4 {
  color: #E2E8F0;
  margin-bottom: var(--space-md);
  font-size: 1.05rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: #E2E8F0;
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--highlight);
}

.footer-meta {
  margin-top: var(--space-2xl);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-meta small {
  color: #A0AEC0;
}

.badge-inline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #E2E8F0;
  font-size: var(--text-sm);
}