/* Header, navigation, buttons, diagrams, reusable components, and footer */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  z-index: 1000;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-navy);
  color: var(--color-bg);
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-sm);
  color: var(--color-bg);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  transition: background-color var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  background-color: rgba(247, 243, 234, 0.92);
  box-shadow: var(--shadow-subtle);
  backdrop-filter: blur(6px);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--width-wide);
  margin-inline: auto;
  padding: 0 var(--space-md);
  height: 100%;
}

.nav-brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--color-navy);
  line-height: 1.2;
}

.nav-brand:hover {
  color: var(--color-navy);
}

.nav-brand-name {
  font-weight: 700;
  font-size: var(--text-sm);
}

.nav-brand-short {
  font-size: var(--text-xs);
  color: var(--color-ocean);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-xs);
  z-index: 110;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-navy);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

.nav-links {
  display: flex;
  gap: var(--space-md);
}

.nav-links a {
  text-decoration: none;
  color: var(--color-charcoal);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-xs) 0;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--color-ocean);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
  min-height: 44px;
  min-width: 44px;
}

.btn-primary {
  background-color: var(--color-navy);
  color: var(--color-bg);
}

.btn-primary:hover {
  background-color: var(--color-ocean);
  color: var(--color-bg);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-text {
  color: var(--color-ocean);
  padding: 0.75rem 0.5rem;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.btn-text:hover {
  color: var(--color-navy);
}

.btn-nav {
  font-size: var(--text-xs);
  padding: 0.5rem 1rem;
}

.divisions-header {
  margin-bottom: var(--space-xl);
  max-width: 40ch;
}

.divisions-header p {
  margin-top: var(--space-sm);
  color: var(--color-charcoal);
}

.division-map {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto auto;
  gap: var(--space-md);
  min-height: 500px;
  padding: var(--space-lg);
}

.division-hub {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 2px solid var(--color-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  z-index: 2;
}

.division-hub-label {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-navy);
  text-align: center;
}

.division-connections {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.division-node {
  position: relative;
  z-index: 1;
  padding: var(--space-md);
  max-width: 220px;
  transition: transform var(--transition);
}

.division-node:hover,
.division-node:focus-visible {
  transform: scale(1.03);
}

.division-node h3 {
  font-size: var(--text-sm);
}

.division-node p {
  font-size: var(--text-xs);
  margin-top: var(--space-xs);
  color: var(--color-charcoal);
}

.division-symbol {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.division-symbol svg {
  width: 100%;
  height: 100%;
  transition: transform var(--transition);
}

.division-node:hover .division-symbol svg,
.division-node:focus-visible .division-symbol svg {
  transform: rotate(5deg);
}

.division-labs {
  grid-column: 1;
  grid-row: 1;
  justify-self: start;
}

.division-ai {
  grid-column: 3;
  grid-row: 1;
  justify-self: end;
}

.division-systems {
  grid-column: 1;
  grid-row: 3;
  justify-self: start;
}

.division-studio {
  grid-column: 2;
  grid-row: 3;
  justify-self: center;
}

.division-ventures {
  grid-column: 3;
  grid-row: 3;
  justify-self: end;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.content-card {
  border-left: 3px solid var(--color-ocean);
  padding-left: var(--space-md);
}

.content-card:nth-child(2n) {
  border-left-color: var(--color-gold);
}

.content-card:nth-child(3n) {
  border-left-color: var(--color-coral);
}

.content-card h2,
.content-card h3 {
  font-size: var(--text-lg);
  max-width: none;
}

.content-card p {
  margin-top: var(--space-xs);
  font-size: var(--text-sm);
}

.empty-state {
  border-left: 3px solid var(--color-ocean);
  padding-left: var(--space-md);
}

.empty-state p {
  margin-top: var(--space-sm);
}

.contact-list {
  display: grid;
  gap: var(--space-md);
}

.contact-list a {
  font-weight: 700;
}

.simple-list li {
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(16, 42, 54, 0.12);
}

.site-footer {
  background-color: var(--color-charcoal);
  color: var(--color-sand);
  padding: var(--space-xl) var(--space-md);
}

.footer-inner {
  max-width: var(--width-content);
  margin-inline: auto;
  display: grid;
  gap: var(--space-lg);
}

.footer-name {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-bg);
}

.footer-short {
  font-size: var(--text-xs);
  color: var(--color-cyan);
  margin-left: var(--space-xs);
  font-weight: 600;
}

.footer-tagline {
  margin-top: var(--space-xs);
  font-size: var(--text-sm);
  color: var(--color-sand);
  max-width: 30ch;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-nav a {
  color: var(--color-sand);
  text-decoration: none;
  font-size: var(--text-sm);
}

.footer-nav a:hover {
  color: var(--color-bg);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-cyan);
  opacity: 0.7;
}