/* ============================================================
   AIRPAK EXPRESS NOVA — Glass System & Layout
   iOS 26 Frosted Glass + Navigation Components
   ============================================================ */

/* ===== GLASS SURFACE CLASSES ===== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
}

.glass-ultra {
  background: var(--glass-bg-ultra);
  backdrop-filter: var(--glass-blur-heavy);
  -webkit-backdrop-filter: var(--glass-blur-heavy);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-2xl);
  box-shadow: var(--glass-shadow-strong);
}

.glass-light {
  background: var(--glass-bg-light);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

.glass-tinted {
  background: var(--glass-bg-tinted);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(0, 122, 255, 0.15);
  border-radius: var(--radius-lg);
}

.glass-card {
  background: var(--glass-bg-ultra);
  backdrop-filter: var(--glass-blur-heavy);
  -webkit-backdrop-filter: var(--glass-blur-heavy);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-2xl);
  box-shadow: var(--glass-shadow-strong);
  overflow: hidden;
}

.glass-card-sm {
  background: var(--glass-bg-ultra);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
}

.glass-card-hover {
  transition: transform var(--duration-normal) var(--ease-spring),
              box-shadow var(--duration-normal) var(--ease-spring);
}

.glass-card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--glass-shadow-ultra);
}

.glass-hover-lift {
  transition: all var(--duration-normal) var(--ease-spring);
}
.glass-hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--glass-shadow-strong);
  border-color: rgba(0, 122, 255, 0.2);
}

/* ===== NAVIGATION BAR ===== */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-8);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--duration-normal) var(--ease-smooth);
}

.nav-bar.scrolled {
  background: var(--glass-bg-dark);
  box-shadow: var(--glass-shadow);
}

.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

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

.nav-logo img {
  height: 28px;
  width: auto;
  object-fit: contain;
}

.nav-logo-text {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--apple-label);
  letter-spacing: var(--tracking-tight);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-6);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--apple-label-secondary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-smooth);
  -webkit-tap-highlight-color: transparent;
}

.nav-link:hover {
  color: var(--apple-label);
  background: var(--apple-fill);
  text-decoration: none;
}

.nav-link.active {
  color: var(--apple-blue);
  background: rgba(0, 122, 255, 0.08);
}

/* iOS 26 Icon Buttons */
.nav-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--apple-fill);
  border: 1px solid transparent;
  color: var(--apple-label-secondary);
  font-size: var(--text-lg);
  transition: all var(--duration-fast) var(--ease-spring);
  cursor: pointer;
  position: relative;
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
}

.nav-icon:hover {
  background: var(--apple-fill-secondary);
  color: var(--apple-label);
  transform: scale(1.05);
}

.nav-icon:active {
  transform: scale(0.93);
}

.nav-icon .badge-dot {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 8px;
  height: 8px;
  background: var(--apple-red);
  border-radius: var(--radius-full);
  border: 2px solid var(--apple-bg);
}

/* Language Pill */
.lang-pill {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4) var(--space-1) var(--space-2);
  background: var(--apple-fill);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--apple-label-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
  text-decoration: none;
}

.lang-pill:hover {
  background: var(--apple-fill-secondary);
  color: var(--apple-label);
}

.lang-pill .flag {
  font-size: var(--text-base);
  line-height: 1;
}

/* Theme Toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--apple-fill);
  border: 1px solid transparent;
  font-size: var(--text-lg);
  color: var(--apple-label-secondary);
  cursor: pointer;
  transition: all var(--duration-slow) var(--ease-spring);
  -webkit-tap-highlight-color: transparent;
}

.theme-toggle:hover {
  background: var(--apple-fill-secondary);
  color: var(--apple-label);
  transform: rotate(20deg);
}

.theme-toggle .icon-sun { display: block; }
.theme-toggle .icon-moon { display: none; }

[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* Sign In / CTA Buttons */
.nav-signin {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: var(--apple-fill);
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--apple-label);
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-smooth);
  -webkit-tap-highlight-color: transparent;
}

.nav-signin:hover {
  background: var(--apple-fill-secondary);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: var(--apple-blue);
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: white;
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-spring);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.35);
  -webkit-tap-highlight-color: transparent;
}

.nav-cta:hover {
  background: var(--apple-blue-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 122, 255, 0.45);
  text-decoration: none;
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  padding: var(--space-2);
}

.nav-hamburger span {
  display: block;
  height: 2px;
  background: var(--apple-label);
  border-radius: 1px;
  transition: all var(--duration-fast) var(--ease-smooth);
}

/* ===== SIDEBAR ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--apple-bg-grouped-secondary);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--apple-separator);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sticky);
  transition: width var(--duration-normal) var(--ease-spring);
  overflow: hidden;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed);
}

.sidebar-header {
  height: var(--nav-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-5);
  gap: var(--space-3);
  border-bottom: 1px solid var(--apple-separator);
  flex-shrink: 0;
}

.sidebar-logo img {
  height: 24px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.sidebar-brand {
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--apple-label);
  white-space: nowrap;
  overflow: hidden;
}

.sidebar.collapsed .sidebar-brand {
  display: none;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-section {
  margin-bottom: var(--space-3);
}

.sidebar-section-title {
  font-size: var(--text-2xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--apple-label-tertiary);
  padding: var(--space-2) var(--space-3);
  white-space: nowrap;
}

.sidebar.collapsed .sidebar-section-title {
  display: none;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--apple-label-secondary);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  transition: all var(--duration-fast) var(--ease-smooth);
  -webkit-tap-highlight-color: transparent;
}

.sidebar-nav-item:hover {
  color: var(--apple-label);
  background: var(--apple-fill);
  text-decoration: none;
}

.sidebar-nav-item.active {
  color: var(--apple-blue);
  background: rgba(0, 122, 255, 0.08);
}

.sidebar-nav-item .icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  flex-shrink: 0;
  background: var(--apple-fill-tertiary);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.sidebar-nav-item.active .icon {
  background: rgba(0, 122, 255, 0.15);
}

.sidebar-nav-item .label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-nav-item .badge {
  margin-left: auto;
  background: var(--apple-red);
  color: white;
  font-size: var(--text-2xs);
  font-weight: var(--font-bold);
  padding: 1px 7px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.sidebar.collapsed .badge {
  display: none;
}

.sidebar-footer {
  padding: var(--space-3);
  border-top: 1px solid var(--apple-separator);
  flex-shrink: 0;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: background var(--duration-fast);
  cursor: pointer;
}

.sidebar-user:hover {
  background: var(--apple-fill);
}

.user-avatar {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: white;
  background: linear-gradient(135deg, var(--apple-blue), var(--apple-indigo));
  flex-shrink: 0;
}

.user-info {
  flex: 1;
  overflow: hidden;
}

.user-name {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--apple-label);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: var(--text-xs);
  color: var(--apple-label-secondary);
}

.sidebar.collapsed .user-info {
  display: none;
}

/* Sidebar Toggle Button */
.sidebar-toggle {
  position: fixed;
  top: 14px;
  left: calc(var(--sidebar-width) + 8px);
  z-index: var(--z-fixed);
  width: 28px;
  height: 28px;
  background: var(--apple-bg-secondary);
  border: 1px solid var(--apple-separator);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-base);
  color: var(--apple-label-secondary);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-spring);
  box-shadow: var(--shadow-sm);
}

.sidebar.collapsed ~ .sidebar-toggle,
.sidebar.collapsed + .sidebar-toggle {
  left: calc(var(--sidebar-collapsed) + 8px);
}

.sidebar.collapsed ~ .main-area {
  margin-left: var(--sidebar-collapsed);
}

/* ===== TOPBAR ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  height: var(--topbar-height);
  background: var(--apple-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--apple-separator);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  gap: var(--space-4);
}

.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.topbar-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--apple-label);
  letter-spacing: var(--tracking-tight);
}

.topbar-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--apple-label-secondary);
}

.topbar-breadcrumb strong {
  color: var(--apple-label);
  font-weight: var(--font-semibold);
}

/* Search Bar */
.search-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--apple-fill);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  padding: 0 var(--space-4);
  height: 36px;
  min-width: 240px;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.search-bar:focus-within {
  border-color: var(--apple-blue);
  background: var(--apple-fill-secondary);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.search-bar .icon {
  font-size: var(--text-base);
  color: var(--apple-gray);
  flex-shrink: 0;
}

.search-bar input {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  font-size: var(--text-sm);
  color: var(--apple-label);
  min-width: 0;
}

.search-bar input::placeholder {
  color: var(--apple-gray);
}

/* ===== LAYOUT UTILITIES ===== */
.main-area {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--duration-normal) var(--ease-spring);
}

.page-content {
  flex: 1;
  padding: var(--space-6);
}

.container {
  width: 100%;
  max-width: var(--max-width-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-sm { max-width: var(--max-width-sm); }
.container-md { max-width: var(--max-width-md); }
.container-lg { max-width: var(--max-width-lg); }

/* ===== GRID SYSTEM ===== */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.mobile-open { transform: translateX(0); width: var(--sidebar-width); }
  .main-area { margin-left: 0 !important; }
  .sidebar-toggle { display: none; }
  .grid-cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-cols-6 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
  .nav-bar { padding: 0 var(--space-4); }
  .page-content { padding: var(--space-4); }
  .grid-cols-2 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .grid-cols-3 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .grid-cols-4 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .grid-cols-6 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .search-bar { min-width: 160px; }
}

@media (max-width: 480px) {
  .grid-cols-6 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .search-bar { min-width: 120px; }
  .topbar-left { gap: var(--space-2); }
  .topbar-right { gap: var(--space-1); }
}