/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: transparent;
  transition: all 0.35s ease;
  padding: var(--space-3) 0;
}

.header.scrolled,
.header.header-scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  padding: var(--space-1) 0;
}

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

/* Header right-side mobile controls */
.header-right-mobile {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

/* ─── Logo Container ─── */
.logo-container {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.logo-container:hover {
  opacity: 0.85;
}

.school-logo {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(0, 86, 164, 0.15);
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.header-scrolled .school-logo {
  width: 38px;
  height: 38px;
}

.school-logo:hover {
  transform: scale(1.05);
}

.school-name {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.school-name .line1 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-700);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.school-name .line2 {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray-500);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.header-scrolled .school-name .line1 {
  color: var(--primary-700);
}

/* Legacy .logo a fallback */
.logo a {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.scrolled .logo a {
  color: var(--primary-600);
}

/* ─── Desktop Navigation ─── */
.desktop-nav {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--gray-700);
  font-weight: 500;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 3px;
  white-space: nowrap;
  transition: color var(--transition-fast);
  padding: 6px 2px;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary-600);
  border-radius: 2px;
  transition: width 0.25s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover {
  color: var(--primary-600);
}

.scrolled .nav-link {
  color: var(--gray-700);
}

.scrolled .nav-link:hover {
  color: var(--primary-600);
}

.dropdown-arrow {
  font-size: 0.6rem;
  transition: transform var(--transition-fast);
  opacity: 0.6;
}

.nav-item:hover .dropdown-arrow {
  transform: rotate(180deg);
}

/* ─── Dropdown Menu ─── */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  width: 210px;
  background-color: white;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
  padding: var(--space-2);
  margin-top: var(--space-1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.2s ease;
  z-index: 10;
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li {
  margin: 2px 0;
}

.dropdown-menu a {
  display: block;
  color: var(--gray-700);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-size: 0.85rem;
}

.dropdown-menu a:hover {
  background-color: var(--primary-50);
  color: var(--primary-600);
  padding-left: 18px;
}

/* ─── Apply Now Button ─── */
.apply-btn {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  color: white;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.85rem;
  transition: all 0.25s ease;
  white-space: nowrap;
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.apply-btn:hover {
  background: linear-gradient(135deg, var(--primary-700), var(--primary-800));
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 86, 164, 0.3);
}

/* ─── Dark Mode Toggle ─── */
.dark-mode-toggle {
  background: transparent;
  border: 1px solid var(--gray-200);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.25s ease;
}

.dark-mode-toggle:hover {
  background: var(--gray-100);
  transform: rotate(15deg);
}

/* ─── Mobile Menu Button ─── */
.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 10;
}

.mobile-menu-btn span {
  width: 100%;
  height: 2px;
  background-color: var(--primary-600);
  border-radius: 10px;
  transition: all var(--transition-fast);
}

/* ─── Mobile Navigation ─── */
.mobile-nav {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background-color: white;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
  padding: var(--space-4) 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
  visibility: hidden;
}

.mobile-nav.open {
  max-height: 100vh;
  visibility: visible;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
}

.mobile-nav-item {
  margin: var(--space-1) 0;
}

.mobile-nav-item a,
.mobile-dropdown-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: var(--space-3) var(--space-4);
  color: var(--gray-700);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.mobile-nav-item a:hover,
.mobile-dropdown-btn:hover {
  color: var(--primary-600);
  background: var(--primary-50);
}

.mobile-dropdown-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mobile-dropdown-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
  padding-left: var(--space-4);
}

.mobile-dropdown-menu.open {
  max-height: 200px;
}

.mobile-dropdown-menu a {
  padding: var(--space-2) var(--space-4);
  font-weight: normal;
  font-size: 0.9rem;
}

.mobile-apply {
  margin-top: var(--space-4);
  padding: 0 var(--space-4);
}

.mobile-apply .apply-btn {
  display: block;
  text-align: center;
  width: 100%;
}

/* ─── Responsive ─── */

/* Mobile: Logo smaller */
@media screen and (max-width: 767px) {
  .school-logo {
    width: 36px;
    height: 36px;
  }
  .school-name .line1 {
    font-size: 0.8rem;
  }
  .school-name .line2 {
    font-size: 0.65rem;
  }
}

/* Desktop */
@media screen and (min-width: 768px) {
  .desktop-nav {
    display: flex;
    align-items: center;
    gap: var(--space-4);
  }
  
  .mobile-menu-btn {
    display: none;
  }
  
  .mobile-nav {
    display: none;
  }
  
  .header-right-mobile {
    display: none;
  }
}

/* Large desktop: slightly bigger nav */
@media screen and (min-width: 1024px) {
  .nav-list {
    gap: var(--space-5, 1.25rem);
  }
  .nav-link {
    font-size: 0.9rem;
  }
  .school-name .line1 {
    font-size: 1.1rem;
  }
  .school-logo {
    width: 48px;
    height: 48px;
  }
}