:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #64748b;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --background: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-light: #64748b;
  --sidebar-bg: #1e293b;
  --sidebar-text: #cbd5e1;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: #0b1221;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
}

.hidden {
  display: none !important;
}

.login-screen,
.app {
  position: relative;
  z-index: 1;
}

/* Background */
.background-video {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -2;
}

.background-video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}

.background-overlay {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.25), transparent 35%),
    radial-gradient(circle at 80% 0%, rgba(14, 165, 233, 0.18), transparent 30%),
    radial-gradient(circle at 40% 80%, rgba(99, 102, 241, 0.16), transparent 32%),
    rgba(7, 12, 26, 0.68);
  backdrop-filter: blur(4px);
  z-index: -1;
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Login Screen */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.login-container {
  background: rgba(255, 255, 255, 0.92);
  padding: 3rem;
  border-radius: 1rem;
  box-shadow: 0 20px 30px -12px rgba(0, 0, 0, 0.35);
  text-align: center;
  max-width: 420px;
  width: 90%;
  backdrop-filter: blur(12px);
}

.brand-logo {
  width: 169px;
  height: 169px;
  object-fit: contain;
  margin-bottom: 1.25rem;
}

.login-container h1 {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.login-container h2 {
  color: white;
  margin-bottom: 1rem;
}

.login-container p {
  color: var(--text-light);
  margin-bottom: 2rem;
}

.login-hint {
  font-size: 0.875rem;
  margin-top: 1rem !important;
}

/* Buttons */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

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

.btn-secondary:hover {
  background: #475569;
}

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

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

.btn-text {
  background: transparent;
  color: var(--sidebar-text);
  padding: 0.5rem 1rem;
}

.btn-text:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

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

/* Sidebar */
.sidebar {
  width: 260px;
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(10px);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  z-index: 100;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.brand-logo-sm {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.brand-name {
  color: white;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-tagline {
  color: var(--sidebar-text);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar-nav {
  flex: 1;
  padding: 1rem 0;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  color: var(--sidebar-text);
  text-decoration: none;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: white;
}

.nav-item.active {
  background: rgba(37, 99, 235, 0.2);
  border-left-color: var(--primary);
  color: white;
}

.nav-item .icon {
  font-size: 1.25rem;
}

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

.user-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  margin-bottom: 0.5rem;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.user-details {
  flex: 1;
  min-width: 0;
}

.user-name {
  color: white;
  font-weight: 500;
  font-size: 0.875rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: 0.75rem;
  color: var(--sidebar-text);
  text-transform: uppercase;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 2rem;
  min-height: 100vh;
}

.page {
  display: none;
}

.page.active {
  display: block;
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.page-header h1 {
  font-size: 2rem;
  color: white;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--surface);
  padding: 1.5rem;
  border-radius: 0.75rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.stat-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: bold;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.stat-label {
  color: var(--text-light);
  font-size: 0.875rem;
}

/* Table */
.table-container {
  background: var(--surface);
  border-radius: 0.75rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  overflow-x: auto;
}

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

.table th {
  background: var(--background);
  padding: 0.75rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text);
  border-bottom: 2px solid var(--border);
  border-left: none;
  border-right: none;
  border-top: none;
  white-space: nowrap;
}

.table td {
  padding: 0.75rem;
  font-size: 0.875rem;
  border: none;
  vertical-align: middle;
}

.table tr {
  border-bottom: 1px solid var(--border);
}

.table tr:last-child {
  border-bottom: none;
}

.table tr:hover {
  background: var(--background);
}

.loading {
  padding: 3rem;
  text-align: center;
  color: var(--text-light);
}

/* Badge */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
}

.badge-success {
  background: #d1fae5;
  color: #065f46;
}

.badge-danger {
  background: #fee2e2;
  color: #991b1b;
}

.badge-warning {
  background: #fef3c7;
  color: #92400e;
}

.badge-info {
  background: #dbeafe;
  color: #1e40af;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.search-input {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-size: 1rem;
  min-width: 300px;
}

.filter-select {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-size: 0.875rem;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s;
}

.modal {
  background: white;
  border-radius: 0.75rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  font-size: 1.5rem;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* Actions */
.actions {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.actions .btn-sm {
  white-space: nowrap;
  font-size: 0.7rem;
  padding: 0.35rem 0.65rem;
}

.table td:last-child {
  text-align: right;
}

/* Card - full width layout */
.card {
  width: 100%;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.card-header h2 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: white;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
    padding: 1rem;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .search-input {
    min-width: 100%;
  }
}

/* Card Grid Layout */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}