/* ============================================================
   ROSE TECH ACADEMY — Navigation
   White background, dark text, teal accent
   ============================================================ */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #FFFFFF;
  border-bottom: 1px solid var(--color-divider);
  transition:
    box-shadow var(--transition-interactive),
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.site-nav--hidden {
  transform: translateY(-100%);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: var(--space-6);
}

/* ── Logo ── */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-mark {
  width: 38px;
  height: 46px;
  flex-shrink: 0;
}

.nav-logo-img {
  height: 56px;
  width: auto;
  display: block;
  object-fit: contain;
  background: #FFFFFF;
  border-radius: 6px;
  padding: 4px 10px;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.nav-logo-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.nav-logo-tagline {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-top: 2px;
}

/* ── Desktop links ── */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition-interactive), background var(--transition-interactive);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}

/* ── Nav actions ── */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.nav-theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: transparent;
  cursor: pointer;
  border: 1px solid var(--color-border);
}

.nav-theme-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  background: #2B7A9A;
  color: #FFFFFF;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: 2px solid #2B7A9A;
  cursor: pointer;
  transition: background var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
}

.nav-cta:hover {
  background: #1E6080;
  border-color: #1E6080;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* ── Mobile menu button ── */
.nav-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
  cursor: pointer;
}

/* ── Mobile menu ── */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 70px 0 0 0;
  background: #FFFFFF;
  border-top: 1px solid var(--color-divider);
  padding: var(--space-6);
  z-index: 99;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-menu.is-open {
  transform: translateX(0);
}

.mobile-menu-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-menu-links .nav-link {
  font-size: var(--text-base);
  padding: var(--space-3) var(--space-4);
}

.mobile-menu-cta {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

@media (max-width: 900px) {
  .nav-links  { display: none; }
  .nav-cta    { display: none; }
  .nav-menu-btn { display: flex; }
  .mobile-menu  { display: block; }
}

@media (max-width: 480px) {
  .nav-logo-tagline { display: none; }
}

/* ── Dark mode nav ── */
[data-theme='dark'] .site-nav,
[data-theme='dark'] .mobile-menu {
  background: var(--color-surface);
  border-bottom-color: var(--color-divider);
}