/* =====================================================
   FLIGHT SCHEDULE MANAGEMENT SYSTEM - AirAsia Theme
   Modern CSS with Custom Properties & Animations
   ===================================================== */

/* ===== CSS Custom Properties ===== */
:root {
  /* AirAsia Brand Colors */
  --airasia-red: #E31837;
  --airasia-red-dark: #B71530;
  --airasia-red-light: #FF1F4B;
  --airasia-red-10: rgba(227, 24, 55, 0.1);
  --airasia-red-20: rgba(227, 24, 55, 0.2);
  
  /* Neutrals */
  --charcoal: #333333;
  --dark-accent: #1F2937;
  --dark-accent-light: #374151;
  --secondary-gray: #6B7280;
  --light-gray: #F3F4F6;
  --border-gray: #E5E7EB;
  --white: #FFFFFF;
  
  /* Semantic Colors */
  --success: #10B981;
  --success-light: #D1FAE5;
  --warning: #F59E0B;
  --warning-light: #FEF3C7;
  --error: #EF4444;
  --error-light: #FEE2E2;
  --info: #3B82F6;
  --info-light: #DBEAFE;
  
  /* Status Colors */
  --status-scheduled-bg: #FEF3F2;
  --status-scheduled-text: #E31837;
  --status-published-bg: #D1FAE5;
  --status-published-text: #059669;
  --status-draft-bg: #FEF3C7;
  --status-draft-text: #D97706;
  --status-cancelled-bg: #FEE2E2;
  --status-cancelled-text: #DC2626;
  --status-departed-bg: #DBEAFE;
  --status-departed-text: #2563EB;
  --status-delayed-bg: #FFEDD5;
  --status-delayed-text: #EA580C;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  
  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-1: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-2: 0 4px 6px rgba(0,0,0,0.1), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-3: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --shadow-4: 0 20px 25px rgba(0,0,0,0.15), 0 10px 10px rgba(0,0,0,0.04);
  
  /* Layout */
  --sidebar-width: 260px;
  --sidebar-collapsed: 72px;
  --header-height: 64px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
}

/* ===== Reset & Base Styles ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 14px;
  line-height: 1.5;
  color: var(--charcoal);
  background-color: var(--light-gray);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--dark-accent);
}

h1 { font-size: 32px; font-weight: 700; }
h2 { font-size: 24px; }
h3 { font-size: 20px; }
h4 { font-size: 16px; }

p { margin-bottom: var(--space-4); }

.text-mono {
  font-family: var(--font-mono);
  font-size: 13px;
}

.text-sm { font-size: 12px; }
.text-muted { color: var(--secondary-gray); }
.text-red { color: var(--airasia-red); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-error { color: var(--error); }

/* ===== Layout Structure ===== */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, var(--dark-accent) 0%, #111827 100%);
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: width var(--transition-slow);
  overflow: hidden;
}

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

.sidebar-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-logo {
  height: 36px;
  width: auto;
  transition: var(--transition-normal);
}

.sidebar-logo-small {
  display: none;
  height: 32px;
  width: 32px;
}

.sidebar.collapsed .sidebar-logo { display: none; }
.sidebar.collapsed .sidebar-logo-small { display: block; }

.sidebar-nav {
  flex: 1;
  padding: var(--space-4) 0;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: var(--space-6);
}

.nav-section-title {
  padding: var(--space-2) var(--space-4);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.4);
}

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

.nav-item {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: var(--transition-fast);
  position: relative;
  gap: var(--space-3);
}

.nav-item:hover {
  background: var(--airasia-red-20);
  color: var(--white);
}

.nav-item.active {
  background: var(--airasia-red);
  color: var(--white);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--white);
}

.nav-item-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-item-icon svg {
  width: 20px;
  height: 20px;
}

.nav-item-text {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
}

.sidebar.collapsed .nav-item-text {
  display: none;
}

.sidebar.collapsed .nav-item {
  justify-content: center;
  padding: var(--space-3);
}

.nav-badge {
  margin-left: auto;
  background: var(--airasia-red-light);
  color: var(--white);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

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

.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid rgba(255,255,255,0.1);
}

.sidebar-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2);
  background: rgba(255,255,255,0.05);
  border: none;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.6);
  cursor: pointer;
  transition: var(--transition-fast);
}

.sidebar-toggle:hover {
  background: rgba(255,255,255,0.1);
  color: var(--white);
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  transition: margin-left var(--transition-slow);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.sidebar.collapsed + .main-content {
  margin-left: var(--sidebar-collapsed);
}

/* ===== Header ===== */
.header {
  height: var(--header-height);
  background: var(--white);
  border-bottom: 1px solid var(--border-gray);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  position: sticky;
  top: 0;
  z-index: 50;
  gap: var(--space-4);
}

.header-search {
  flex: 1;
  max-width: 480px;
}

.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: var(--space-3);
  color: var(--secondary-gray);
  pointer-events: none;
}

.search-input {
  width: 100%;
  height: 40px;
  padding: var(--space-2) var(--space-4);
  padding-left: 40px;
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-full);
  font-size: 14px;
  background: var(--light-gray);
  transition: var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--airasia-red);
  background: var(--white);
  box-shadow: 0 0 0 3px var(--airasia-red-10);
}

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

.search-shortcut {
  position: absolute;
  right: var(--space-3);
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--secondary-gray);
  font-size: 12px;
}

.search-shortcut kbd {
  background: var(--white);
  border: 1px solid var(--border-gray);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--secondary-gray);
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
}

.header-btn:hover {
  background: var(--light-gray);
  color: var(--charcoal);
}

.notification-dot {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 8px;
  height: 8px;
  background: var(--airasia-red);
  border-radius: 50%;
  border: 2px solid var(--white);
}

.header-divider {
  width: 1px;
  height: 32px;
  background: var(--border-gray);
}

.user-menu {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
}

.user-menu:hover {
  background: var(--light-gray);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--airasia-red), var(--airasia-red-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 600;
  font-size: 14px;
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-weight: 600;
  font-size: 14px;
  color: var(--charcoal);
}

.user-role {
  font-size: 12px;
  color: var(--secondary-gray);
}

/* ===== Page Content ===== */
.page-content {
  flex: 1;
  padding: var(--space-6);
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  gap: var(--space-4);
}

.page-title {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.page-title h1 {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--secondary-gray);
}

.breadcrumb a {
  color: var(--airasia-red);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-separator {
  color: var(--border-gray);
}

.page-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  height: 40px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-primary);
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--airasia-red);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--airasia-red-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-2);
}

.btn-secondary {
  background: var(--white);
  color: var(--airasia-red);
  border: 1px solid var(--airasia-red);
}

.btn-secondary:hover {
  background: var(--airasia-red-10);
}

.btn-ghost {
  background: transparent;
  color: var(--secondary-gray);
}

.btn-ghost:hover {
  background: var(--light-gray);
  color: var(--charcoal);
}

.btn-dark {
  background: var(--dark-accent);
  color: var(--white);
}

.btn-dark:hover {
  background: var(--dark-accent-light);
}

.btn-sm {
  height: 32px;
  padding: var(--space-1) var(--space-3);
  font-size: 13px;
}

.btn-lg {
  height: 48px;
  padding: var(--space-3) var(--space-6);
  font-size: 16px;
}

.btn-icon {
  width: 40px;
  padding: 0;
}

.btn-icon.btn-sm {
  width: 32px;
}

/* ===== Cards ===== */
.card {
  background: var(--white);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.card-accent {
  border-top: 4px solid var(--airasia-red);
}

.card-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-gray);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--dark-accent);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.card-body {
  padding: var(--space-5);
}

.card-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-gray);
  background: var(--light-gray);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* ===== KPI Cards ===== */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.kpi-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  border: 1px solid var(--border-gray);
  box-shadow: var(--shadow-1);
  position: relative;
  overflow: hidden;
  transition: var(--transition-normal);
}

.kpi-card:hover {
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--airasia-red);
}

.kpi-card.success::before { background: var(--success); }
.kpi-card.warning::before { background: var(--warning); }
.kpi-card.info::before { background: var(--info); }

.kpi-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.kpi-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--airasia-red-10);
  color: var(--airasia-red);
}

.kpi-card.success .kpi-icon {
  background: var(--success-light);
  color: var(--success);
}

.kpi-card.warning .kpi-icon {
  background: var(--warning-light);
  color: var(--warning);
}

.kpi-card.info .kpi-icon {
  background: var(--info-light);
  color: var(--info);
}

.kpi-trend {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 500;
}

.kpi-trend.up { color: var(--success); }
.kpi-trend.down { color: var(--error); }

.kpi-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--dark-accent);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.kpi-label {
  font-size: 14px;
  color: var(--secondary-gray);
}

.kpi-sublabel {
  font-size: 12px;
  color: var(--secondary-gray);
  margin-top: var(--space-2);
}

/* ===== Dashboard Grid ===== */
.dashboard-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-5);
}

.dashboard-grid-full {
  grid-column: 1 / -1;
}

/* ===== Flight Cards ===== */
.flight-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.flight-card {
  display: flex;
  align-items: center;
  padding: var(--space-4);
  background: var(--white);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  gap: var(--space-4);
  cursor: pointer;
  position: relative;
}

.flight-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--airasia-red);
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.flight-card:hover {
  box-shadow: var(--shadow-2);
  border-color: var(--airasia-red);
}

.flight-card.published::before { background: var(--success); }
.flight-card.draft::before { background: var(--warning); }
.flight-card.cancelled::before { background: var(--error); }
.flight-card.departed::before { background: var(--info); }

.flight-number {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--airasia-red);
  min-width: 80px;
}

.flight-route {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 1;
}

.route-airport {
  text-align: center;
}

.route-code {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--dark-accent);
}

.route-city {
  font-size: 12px;
  color: var(--secondary-gray);
}

.route-line {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--border-gray) 0%, var(--airasia-red) 50%, var(--border-gray) 100%);
  position: relative;
  min-width: 60px;
}

.route-plane {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--white);
  padding: 0 var(--space-2);
  color: var(--airasia-red);
}

.flight-times {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 100px;
}

.flight-time {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--dark-accent);
}

.flight-duration {
  font-size: 12px;
  color: var(--secondary-gray);
}

.flight-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.flight-aircraft {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: var(--light-gray);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
}

.days-of-week {
  display: flex;
  gap: 4px;
}

.day-circle {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 600;
  background: var(--light-gray);
  color: var(--secondary-gray);
}

.day-circle.active {
  background: var(--airasia-red);
  color: var(--white);
}

/* ===== Status Badges ===== */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}

.status-badge.scheduled {
  background: var(--status-scheduled-bg);
  color: var(--status-scheduled-text);
}

.status-badge.published {
  background: var(--status-published-bg);
  color: var(--status-published-text);
}

.status-badge.draft {
  background: var(--status-draft-bg);
  color: var(--status-draft-text);
}

.status-badge.cancelled {
  background: var(--status-cancelled-bg);
  color: var(--status-cancelled-text);
}

.status-badge.departed {
  background: var(--status-departed-bg);
  color: var(--status-departed-text);
}

.status-badge.delayed {
  background: var(--status-delayed-bg);
  color: var(--status-delayed-text);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* ===== Data Table ===== */
.data-table-container {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  background: var(--light-gray);
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  color: var(--secondary-gray);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--border-gray);
  position: sticky;
  top: 0;
  white-space: nowrap;
}

.data-table th.sortable {
  cursor: pointer;
  user-select: none;
}

.data-table th.sortable:hover {
  color: var(--charcoal);
}

.data-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-gray);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: var(--transition-fast);
}

.data-table tbody tr:hover {
  background: var(--airasia-red-10);
}

.data-table tbody tr.selected {
  background: var(--error-light);
}

.table-checkbox {
  width: 20px;
  height: 20px;
  accent-color: var(--airasia-red);
  cursor: pointer;
}

.table-link {
  color: var(--airasia-red);
  text-decoration: none;
  font-weight: 500;
}

.table-link:hover {
  text-decoration: underline;
}

/* ===== Filter Panel ===== */
.filter-panel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--white);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.filter-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--secondary-gray);
}

/* ===== Form Controls ===== */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--charcoal);
  margin-bottom: var(--space-2);
}

.form-label.required::after {
  content: ' *';
  color: var(--error);
}

.form-input, .form-select {
  width: 100%;
  height: 40px;
  padding: var(--space-2) var(--space-3);
  font-size: 14px;
  font-family: var(--font-primary);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-sm);
  background: var(--white);
  transition: var(--transition-fast);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--airasia-red);
  box-shadow: 0 0 0 3px var(--airasia-red-10);
}

.form-input.error {
  border-color: var(--error);
}

.form-input::placeholder {
  color: var(--secondary-gray);
}

.form-input-sm {
  height: 32px;
  font-size: 13px;
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-error {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-1);
  font-size: 12px;
  color: var(--error);
}

.form-hint {
  margin-top: var(--space-1);
  font-size: 12px;
  color: var(--secondary-gray);
}

/* ===== Checkbox & Radio ===== */
.checkbox-group, .radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.checkbox-label, .radio-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: 14px;
}

.checkbox-input, .radio-input {
  width: 20px;
  height: 20px;
  accent-color: var(--airasia-red);
  cursor: pointer;
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border-gray);
  gap: var(--space-1);
}

.tab {
  padding: var(--space-3) var(--space-4);
  font-size: 14px;
  font-weight: 500;
  color: var(--secondary-gray);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition-fast);
  margin-bottom: -1px;
}

.tab:hover {
  color: var(--charcoal);
  background: var(--airasia-red-10);
}

.tab.active {
  color: var(--airasia-red);
  border-bottom-color: var(--airasia-red);
}

.tab-content {
  padding-top: var(--space-5);
}

/* ===== Alerts ===== */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.alert-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.alert-message {
  font-size: 14px;
}

.alert.success {
  background: var(--success-light);
  border: 1px solid var(--success);
  color: var(--success);
}

.alert.warning {
  background: var(--warning-light);
  border: 1px solid var(--warning);
  color: var(--warning);
}

.alert.error {
  background: var(--error-light);
  border: 1px solid var(--error);
  color: var(--error);
}

.alert.info {
  background: var(--info-light);
  border: 1px solid var(--info);
  color: var(--info);
}

/* ===== Alerts List ===== */
.alert-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--light-gray);
  margin-bottom: var(--space-2);
  transition: var(--transition-fast);
}

.alert-item:hover {
  background: var(--airasia-red-10);
}

.alert-item-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.alert-item-icon.error {
  background: var(--error-light);
  color: var(--error);
}

.alert-item-icon.warning {
  background: var(--warning-light);
  color: var(--warning);
}

.alert-item-icon.info {
  background: var(--info-light);
  color: var(--info);
}

.alert-item-content {
  flex: 1;
  min-width: 0;
}

.alert-item-title {
  font-weight: 600;
  font-size: 14px;
  color: var(--dark-accent);
  margin-bottom: 2px;
}

.alert-item-text {
  font-size: 13px;
  color: var(--secondary-gray);
}

.alert-item-time {
  font-size: 11px;
  color: var(--secondary-gray);
}

/* ===== Activity Feed ===== */
.activity-list {
  display: flex;
  flex-direction: column;
}

.activity-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-gray);
}

.activity-item:last-child {
  border-bottom: none;
}

.activity-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--airasia-red-10);
  color: var(--airasia-red);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.activity-icon.success {
  background: var(--success-light);
  color: var(--success);
}

.activity-icon.warning {
  background: var(--warning-light);
  color: var(--warning);
}

.activity-content {
  flex: 1;
  min-width: 0;
}

.activity-text {
  font-size: 14px;
  color: var(--charcoal);
  margin-bottom: 2px;
}

.activity-text strong {
  color: var(--dark-accent);
}

.activity-time {
  font-size: 12px;
  color: var(--secondary-gray);
}

/* ===== Gantt Chart ===== */
.gantt-container {
  background: var(--white);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.gantt-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-gray);
  background: var(--light-gray);
}

.gantt-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.gantt-body {
  display: flex;
  height: 600px;
  overflow: auto;
}

.gantt-sidebar {
  width: 200px;
  flex-shrink: 0;
  border-right: 1px solid var(--border-gray);
  background: var(--white);
}

.gantt-sidebar-header {
  height: 48px;
  padding: var(--space-3);
  font-weight: 600;
  font-size: 13px;
  color: var(--secondary-gray);
  background: var(--light-gray);
  border-bottom: 1px solid var(--border-gray);
  display: flex;
  align-items: center;
}

.gantt-row-label {
  height: 48px;
  padding: var(--space-3);
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  border-bottom: 1px solid var(--border-gray);
}

.gantt-timeline {
  flex: 1;
  overflow-x: auto;
  min-width: 0;
}

.gantt-timeline-header {
  display: flex;
  height: 48px;
  background: var(--light-gray);
  border-bottom: 1px solid var(--border-gray);
  position: sticky;
  top: 0;
  z-index: 10;
}

.gantt-time-slot {
  flex-shrink: 0;
  width: 60px;
  border-right: 1px solid var(--border-gray);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

.gantt-time-slot .time {
  font-weight: 600;
  color: var(--charcoal);
}

.gantt-time-slot .date {
  font-size: 10px;
  color: var(--secondary-gray);
}

.gantt-timeline-rows {
  position: relative;
}

.gantt-row {
  height: 48px;
  border-bottom: 1px solid var(--border-gray);
  position: relative;
  display: flex;
}

.gantt-row:hover {
  background: var(--airasia-red-10);
}

.gantt-cell {
  flex-shrink: 0;
  width: 60px;
  height: 100%;
  border-right: 1px solid var(--border-gray);
}

.gantt-bar {
  position: absolute;
  top: 8px;
  height: 32px;
  background: var(--airasia-red);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  padding: 0 var(--space-2);
  color: var(--white);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  z-index: 5;
}

.gantt-bar:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-2);
}

.gantt-bar.published {
  background: var(--success);
}

.gantt-bar.draft {
  background: var(--warning);
}

.gantt-bar.conflict {
  background: repeating-linear-gradient(
    45deg,
    var(--error),
    var(--error) 4px,
    var(--error-light) 4px,
    var(--error-light) 8px
  );
}

/* ===== Network Map ===== */
.map-container {
  width: 100%;
  height: 500px;
  background: #E8E8E8;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

.map-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #B8D4E8 0%, #E0EBF3 100%);
  color: var(--secondary-gray);
}

.map-controls {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.map-control-btn {
  width: 36px;
  height: 36px;
  background: var(--white);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-1);
  transition: var(--transition-fast);
}

.map-control-btn:hover {
  background: var(--light-gray);
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-4);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow: hidden;
  transform: scale(0.95) translateY(10px);
  transition: var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-gray);
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--dark-accent);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--secondary-gray);
  transition: var(--transition-fast);
}

.modal-close:hover {
  background: var(--light-gray);
  color: var(--charcoal);
}

.modal-body {
  padding: var(--space-5);
  overflow-y: auto;
  max-height: 60vh;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-gray);
  background: var(--light-gray);
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-top: 1px solid var(--border-gray);
}

.pagination-info {
  font-size: 14px;
  color: var(--secondary-gray);
}

.pagination-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.pagination-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-sm);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
  background: var(--light-gray);
  border-color: var(--airasia-red);
  color: var(--airasia-red);
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination-btn.active {
  background: var(--airasia-red);
  border-color: var(--airasia-red);
  color: var(--white);
}

/* ===== Tooltips ===== */
.tooltip {
  position: relative;
}

.tooltip-content {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  padding: var(--space-2) var(--space-3);
  background: var(--dark-accent);
  color: var(--white);
  font-size: 12px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-fast);
  z-index: 100;
}

.tooltip-content::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--dark-accent);
}

.tooltip:hover .tooltip-content {
  opacity: 1;
  visibility: visible;
}

/* ===== Loading States ===== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--border-gray) 25%,
    var(--light-gray) 50%,
    var(--border-gray) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton-text {
  height: 14px;
  margin-bottom: var(--space-2);
}

.skeleton-heading {
  height: 24px;
  margin-bottom: var(--space-3);
  width: 60%;
}

.skeleton-card {
  height: 100px;
}

/* ===== Empty States ===== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
  text-align: center;
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  margin-bottom: var(--space-5);
  color: var(--border-gray);
}

.empty-state-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: var(--space-2);
}

.empty-state-text {
  font-size: 14px;
  color: var(--secondary-gray);
  margin-bottom: var(--space-5);
  max-width: 300px;
}

/* ===== Dropdown Menu ===== */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--space-1);
  min-width: 180px;
  background: var(--white);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition-fast);
  z-index: 100;
}

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

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  font-size: 14px;
  color: var(--charcoal);
  text-decoration: none;
  transition: var(--transition-fast);
  cursor: pointer;
}

.dropdown-item:hover {
  background: var(--airasia-red-10);
  color: var(--airasia-red);
}

.dropdown-item.danger {
  color: var(--error);
}

.dropdown-item.danger:hover {
  background: var(--error-light);
}

.dropdown-divider {
  height: 1px;
  background: var(--border-gray);
  margin: var(--space-1) 0;
}

/* ===== Quick Actions Panel ===== */
.quick-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.quick-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--light-gray);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  color: inherit;
}

.quick-action-btn:hover {
  background: var(--airasia-red-10);
  border-color: var(--airasia-red);
}

.quick-action-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--airasia-red);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
}

.quick-action-text {
  font-size: 13px;
  font-weight: 500;
  color: var(--charcoal);
  text-align: center;
}

/* ===== Chart Placeholder ===== */
.chart-placeholder {
  height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--light-gray);
  border-radius: var(--radius-md);
  color: var(--secondary-gray);
}

/* ===== Responsive Design ===== */
@media (max-width: 1279px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .page-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .page-actions {
    flex-wrap: wrap;
  }
  
  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .filter-panel {
    flex-direction: column;
    align-items: stretch;
  }
  
  .filter-group {
    width: 100%;
  }
  
  .header-search {
    display: none;
  }
  
  .user-info {
    display: none;
  }
}

@media (max-width: 640px) {
  .kpi-grid {
    grid-template-columns: 1fr;
  }
  
  .page-content {
    padding: var(--space-4);
  }
  
  .flight-card {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .flight-route {
    width: 100%;
  }
  
  .gantt-sidebar {
    width: 120px;
  }
}

/* ===== Print Styles ===== */
@media print {
  .sidebar,
  .header,
  .page-actions,
  .btn {
    display: none !important;
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .card {
    break-inside: avoid;
  }
}

/* ===== Utility Classes ===== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.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-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.w-full { width: 100%; }
.text-center { text-align: center; }
.font-mono { font-family: var(--font-mono); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.hidden { display: none; }
.truncate { 
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== Animations ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { 
    opacity: 0;
    transform: translateY(20px);
  }
  to { 
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-fadeIn { animation: fadeIn 0.3s ease; }
.animate-slideUp { animation: slideUp 0.3s ease; }
.animate-pulse { animation: pulse 2s infinite; }