/* Header Layout */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow var(--transition-base), background-color var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.logo-brand-mark {
  height: 44px;
  width: auto;
  border-radius: var(--radius-sm);
}

/* Desktop Navigation */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-soft);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  padding: var(--space-2);
  color: var(--color-text);
  border-radius: var(--radius-sm);
}

/* Mobile Drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background: var(--color-background);
  padding: var(--space-6) var(--space-5);
  overflow-y: auto;
  border-top: 1px solid var(--color-border);
  z-index: 999;
}

.mobile-drawer.is-open {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-drawer .nav-link {
  font-size: var(--text-lg);
  font-weight: 600;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

/* Ambient Glows */
.ambient-glow {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(80px);
  opacity: 0.6;
  z-index: 0;
}

.glow-blue {
  width: 380px;
  height: 380px;
  background: rgba(7, 94, 171, 0.12);
  top: -60px;
  right: -60px;
}

.glow-cyan {
  width: 320px;
  height: 320px;
  background: rgba(56, 189, 248, 0.14);
  bottom: -40px;
  left: -40px;
}

/* Layout Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.75rem, 3.5vw, 3rem);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.5rem, 2.5vw, 2.25rem);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(1.25rem, 2vw, 1.75rem);
}

.grid-os {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
}

.grid-categories {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 230px), 1fr));
  gap: clamp(1.25rem, 2.5vw, 1.75rem);
}

.grid-2 > *,
.grid-3 > *,
.grid-4 > *,
.grid-os > *,
.grid-categories > *,
.footer-grid > * {
  min-width: 0;
}

/* Footer Layout */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-16);
  padding-bottom: var(--space-10);
  font-size: var(--text-sm);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-heading {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-link {
  color: var(--color-text-soft);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-primary);
}

/* Ecosystem Banner in Footer */
.footer-ecosystem {
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-10);
}

.ecosystem-title {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.ecosystem-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-sm);
}

.ecosystem-item a {
  font-weight: 600;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}