:root {
  --color-bg: #0f1419;
  --color-surface: #1a1f2e;
  --color-surface-light: #252b3b;
  --color-primary: #667eea;
  --color-primary-dark: #5568d3;
  --color-secondary: #764ba2;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --gradient-error: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

.hidden {
  display: none !important;
}

.loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: 1rem;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-surface-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

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

.login-container {
  background: var(--color-surface);
  backdrop-filter: blur(10px);
  border-radius: 1rem;
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.logo {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  margin: 0 auto 1rem;
}

.login-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-header p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--color-surface-light);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.5rem;
  color: var(--color-text);
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

.error-message {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--color-error);
  color: var(--color-error);
  padding: 0.75rem;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--color-surface-light);
  color: var(--color-text);
}

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

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

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

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.login-footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.login-footer p {
  margin-bottom: 0.5rem;
}

.navbar {
  background: var(--color-surface);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.1rem;
}

.navbar-brand .logo {
  width: 40px;
  height: 40px;
  font-size: 1rem;
  margin: 0;
}

.navbar-menu {
  display: flex;
  gap: 0.5rem;
  flex: 1;
}

.nav-link {
  padding: 0.5rem 1rem;
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
  font-weight: 500;
}

.nav-link:hover {
  background: var(--color-surface-light);
  color: var(--color-text);
}

.nav-link.active {
  background: var(--gradient-primary);
  color: white;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-icon {
  position: relative;
  background: var(--color-surface-light);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text);
  transition: all 0.3s ease;
}

.btn-icon:hover {
  background: var(--color-surface);
  transform: translateY(-2px);
}

.badge {
  position: absolute;
  top: -5px;
  right: -5px;
  background: var(--color-error);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  border-radius: 1rem;
  min-width: 18px;
  text-align: center;
}

.user-menu {
  position: relative;
}

.btn-user {
  background: var(--color-surface-light);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  color: var(--color-text);
  font-weight: 500;
  transition: all 0.3s ease;
}

.btn-user:hover {
  background: var(--color-surface);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.5rem;
  box-shadow: var(--shadow-lg);
  min-width: 180px;
  overflow: hidden;
}

.dropdown-item {
  width: 100%;
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  color: var(--color-text);
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
}

.dropdown-item:hover {
  background: var(--color-surface-light);
}

.notifications-panel {
  position: fixed;
  top: 70px;
  right: 2rem;
  width: 400px;
  max-height: 600px;
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1rem;
  box-shadow: var(--shadow-xl);
  z-index: 1000;
  overflow: hidden;
}

.notifications-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.notifications-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.btn-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  cursor: pointer;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.25rem;
  transition: all 0.2s ease;
}

.btn-close:hover {
  background: var(--color-surface-light);
  color: var(--color-text);
}

.notifications-content {
  padding: 1rem;
  max-height: 500px;
  overflow-y: auto;
}

.notification-item {
  padding: 1rem;
  background: var(--color-surface-light);
  border-left: 4px solid var(--color-info);
  border-radius: 0.5rem;
  margin-bottom: 0.75rem;
}

.notification-item.urgency-high {
  border-left-color: var(--color-error);
}

.notification-item.urgency-medium {
  border-left-color: var(--color-warning);
}

.notification-item.urgency-low {
  border-left-color: var(--color-info);
}

.notification-item h6 {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.notification-item p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.main-content {
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.card {
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

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

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.card-body {
  padding: 0;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-left: 4px solid var(--color-primary);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.stat-card.success {
  border-left-color: var(--color-success);
}

.stat-card.warning {
  border-left-color: var(--color-warning);
}

.stat-card.error {
  border-left-color: var(--color-error);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.table-container {
  overflow-x: auto;
}

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

thead {
  background: var(--color-surface-light);
}

th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

td {
  padding: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

tr:hover {
  background: var(--color-surface-light);
}

.table-actions {
  display: flex;
  gap: 0.5rem;
}

.modal-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: 2000;
  padding: 2rem;
}

.modal {
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1rem;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  padding: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.5rem;
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-lg);
  min-width: 300px;
  display: flex;
  align-items: center;
  gap: 1rem;
  animation: slideIn 0.3s ease;
}

.toast.success {
  border-left: 4px solid var(--color-success);
}

.toast.error {
  border-left: 4px solid var(--color-error);
}

.toast.warning {
  border-left: 4px solid var(--color-warning);
}

.toast.info {
  border-left: 4px solid var(--color-info);
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.mb-2 {
  margin-bottom: 0.5rem;
}

.mb-3 {
  margin-bottom: 1rem;
}

.mb-4 {
  margin-bottom: 1.5rem;
}

.text-muted {
  color: var(--color-text-muted);
}

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

@media (max-width: 768px) {

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

  .navbar {
    flex-wrap: wrap;
    padding: 1rem;
  }

  .navbar-menu {
    width: 100%;
    order: 3;
    flex-direction: column;
  }

  .notifications-panel {
    right: 1rem;
    left: 1rem;
    width: auto;
  }

  .main-content {
    padding: 1rem;
  }
}