:root {
  /* Couleurs principales */
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --primary-light: rgba(59, 130, 246, 0.1);
  
  /* Arrière-plans */
  --bg-dark: #0f172a;
  --bg-darker: #0c1221;
  --bg-light: #1e293b;
  
  /* Texte */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Bordures */
  --border-color: #2d3748;
  
  /* États */
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #3b82f6;
  
  /* Ombres */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  
  /* Transitions */
  --transition: all 0.2s ease-in-out;
}

/* Styles de base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.5;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-hover);
  text-decoration: none;
}

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

/* Sidebar */
.sidebar {
  width: 250px;
  background-color: var(--bg-darker);
  border-right: 1px solid var(--border-color);
  padding: 1.5rem 0;
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 50;
}

.brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  padding: 0 1.5rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.side-nav {
  flex: 1;
  overflow-y: auto;
  padding: 0 0.75rem;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  border-radius: 0.375rem;
  margin-bottom: 0.25rem;
  transition: var(--transition);
}

.nav-item:hover, .nav-item.active {
  background-color: var(--bg-light);
  color: var(--text-primary);
}

.nav-item svg {
  margin-right: 0.75rem;
  width: 1.25rem;
  height: 1.25rem;
}

.nav-sep {
  height: 1px;
  background-color: var(--border-color);
  margin: 1rem 0;
}

/* Contenu principal */
.content {
  flex: 1;
  margin-left: 250px;
  padding: 2rem;
  max-width: 100%;
  width: 100%;
}

/* Cartes */
.card {
  background-color: var(--bg-darker);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 600;
}

/* Boutons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

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

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

.btn-outline {
  background-color: transparent;
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  background-color: var(--bg-light);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

/* Formulaires */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 0.5rem 0.75rem;
  background-color: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

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

/* Alertes */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: #34d399;
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #f87171;
}

/* Utilitaires */
.text-muted {
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

.mb-0 {
  margin-bottom: 0;
}

.mt-4 {
  margin-top: 1.5rem;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  
  .sidebar.mobile-show {
    transform: translateX(0);
  }
  
  .content {
    margin-left: 0;
    padding: 1rem;
  }
  
  .mobile-menu-btn {
    display: block;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 60;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 0.375rem;
    padding: 0.5rem;
    cursor: pointer;
  }
}