:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #131b2e;
  --bg-card: #1b253b;
  --bg-card-hover: #22304d;
  --border-color: #2a3b5c;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #38bdf8;
  --accent-indigo: #818cf8;
  --accent-cyan: #22d3ee;
  --status-success: #10b981;
  --status-warning: #f59e0b;
  --status-danger: #ef4444;
  --status-purple: #a855f7;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-family);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Navbar */
header.navbar {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-badge {
  background: linear-gradient(135deg, #0284c7, #6366f1);
  color: #fff;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  letter-spacing: 0.05em;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-subtitle {
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-left: 0.25rem;
  border-left: 1px solid var(--border-color);
  padding-left: 0.5rem;
}

nav.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

nav.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

nav.nav-links a:hover, nav.nav-links a.active {
  color: var(--accent-blue);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  flex: 1;
  width: 100%;
}

/* Headings & Subheadings */
h1, h2, h3, h4 {
  font-weight: 600;
  color: var(--text-primary);
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

/* KPI Cards Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.kpi-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-blue);
}

.kpi-card.success::before { background: var(--status-success); }
.kpi-card.warning::before { background: var(--status-warning); }
.kpi-card.danger::before { background: var(--status-danger); }
.kpi-card.purple::before { background: var(--status-purple); }

.kpi-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.kpi-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

.kpi-subtext {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Card Component */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* AI Briefing Card */
.ai-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95));
  border: 1px solid #38bdf840;
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.ai-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-blue);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.ai-content {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #cbd5e1;
}

.ai-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
}

/* Tables */
.table-container {
  overflow-x: auto;
  overscroll-behavior-x: contain;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

table.data-table {
  width: 100%;
  min-width: 1180px;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
}

table.data-table th {
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

table.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

table.data-table tr:hover {
  background-color: var(--bg-card-hover);
}

.sticky-passenger,
.sticky-actions {
  position: sticky;
  background: var(--bg-card);
  z-index: 2;
}

table.data-table th.sticky-passenger,
table.data-table th.sticky-actions {
  background: var(--bg-secondary);
  z-index: 3;
}

.sticky-passenger { left: 0; min-width: 165px; }
.sticky-actions { right: 0; min-width: 180px; }
table.data-table tr:hover .sticky-passenger,
table.data-table tr:hover .sticky-actions { background: var(--bg-card-hover); }

/* Badges */
.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-success { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid #059669; }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: #fbbf24; border: 1px solid #d97706; }
.badge-danger { background: rgba(239, 68, 68, 0.15); color: #f87171; border: 1px solid #dc2626; }
.badge-info { background: rgba(56, 189, 248, 0.15); color: #38bdf8; border: 1px solid #0284c7; }
.badge-purple { background: rgba(168, 85, 247, 0.15); color: #c084fc; border: 1px solid #9333ea; }
.badge-gray { background: rgba(148, 163, 184, 0.15); color: #94a3b8; border: 1px solid #475569; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}

.btn-primary { background: #0284c7; color: #fff; }
.btn-primary:hover { background: #0369a1; }
.btn-success { background: #059669; color: #fff; }
.btn-success:hover { background: #047857; }
.btn-danger { background: #dc2626; color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-outline { background: transparent; border-color: var(--border-color); color: var(--text-primary); }
.btn-outline:hover { background: var(--bg-card-hover); border-color: var(--accent-blue); }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.75rem; }
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  filter: saturate(0.45);
}

.action-status {
  background: rgba(2, 132, 199, 0.12);
  border: 1px solid var(--accent-blue);
  border-radius: 8px;
  color: var(--text-primary);
  line-height: 1.55;
  margin-bottom: 1.5rem;
  padding: 1rem 1.25rem;
  white-space: pre-line;
}

.action-status.error {
  background: rgba(239, 68, 68, 0.12);
  border-color: var(--status-danger);
}

.loading-spinner {
  animation: loading-spin 0.8s linear infinite;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  border-top-color: currentColor;
  display: inline-block;
  height: 0.9em;
  width: 0.9em;
}

@keyframes loading-spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .loading-spinner { animation: none; }
}

/* Filter Tabs & Search Bar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.filter-tabs {
  display: flex;
  gap: 0.5rem;
}

.filter-tab {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
}

.filter-tab.active {
  background: #0284c7;
  color: #fff;
  border-color: #0284c7;
}

.search-input {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.85rem;
  min-width: 250px;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-blue);
}

/* Modal */
.modal-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal-backdrop.show {
  display: flex;
}

.modal-dialog {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 90%;
  max-width: 600px;
  padding: 1.5rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

.modal-close {
  background: transparent;
  border: 0;
  color: var(--text-secondary);
  cursor: pointer;
  float: right;
  font-size: 1.5rem;
  line-height: 1;
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--accent-blue);
  color: var(--text-primary);
  padding: 0.75rem 1.25rem;
  border-radius: 6px;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  font-size: 0.85rem;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 1rem 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}