/* ===== VARIABLES CSS ===== */
:root {
  /* Couleurs principales */
  --primary-color: #7289da;
  --primary-hover: #5b6eae;
  --success-color: #43b581;
  --success-hover: #369870;
  --warning-color: #f6ad55;
  --warning-hover: #ed8936;
  --error-color: #f04747;
  --error-hover: #e53e3e;
  
  /* Couleurs de fond sombres */
  --dark-bg: #2c2f33;
  --darker-bg: #23272a;
  --card-bg: #36393f;
  
  /* Couleurs de texte sombres */
  --text-primary: #ffffff;
  --text-secondary: #b9bbbe;
  --text-muted: #72767d;
  --border-color: #40444b;
  
  /* Variables pour le thème moderne */
  --modern-bg: #f8fafc;
  --modern-bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  --modern-text: #1a202c;
  --modern-text-secondary: #718096;
  --modern-text-muted: #a0aec0;
  --modern-card: rgba(255, 255, 255, 0.95);
  --modern-card-hover: rgba(255, 255, 255, 0.98);
  --modern-border: rgba(209, 213, 219, 0.3);
  --modern-border-hover: rgba(156, 163, 175, 0.5);
  
  /* Ombres */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Rayons de bordure */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Espacements */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ===== STYLES DE BASE ===== */
* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  background: var(--dark-bg);
  color: var(--text-primary);
  line-height: 1.6;
}

/* Override pour le dashboard moderne */
body.modern-dashboard,
.modern-dashboard {
  background: var(--modern-bg-gradient);
  color: var(--modern-text);
  min-height: 100vh;
  font-feature-settings: 'kern' 1, 'liga' 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== UTILITAIRES ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
}

/* ===== BOUTONS DE BASE ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.75rem 1.25rem;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(114, 137, 218, 0.2);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

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

.btn-primary:hover {
  background: #5b6eae;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(114, 137, 218, 0.3);
}

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

.btn-success:hover {
  background: #369870;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(67, 181, 129, 0.3);
}

.btn-secondary {
  background: #99aab5;
  color: var(--darker-bg);
}

.btn-secondary:hover {
  background: #87909c;
}

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

.btn-danger:hover {
  background: #c0392b;
}

/* ===== LOADER ===== */
.loader-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--darker-bg);
  z-index: 9999;
}

.loader {
  border: 8px solid var(--primary-color);
  border-top: 8px solid var(--darker-bg);
  border-radius: 50%;
  width: 60px;
  height: 60px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  100% {
    transform: rotate(360deg);
  }
}

/* ===== RESPONSIVE BASE ===== */
@media (max-width: 768px) {
  .container {
    padding: 0.5rem;
  }
  
  .btn {
    padding: 0.625rem 1rem;
    font-size: 0.9rem;
  }
}