:root {
  --primary-color: #0078d4;
  --secondary-color: #005a9e;
  --accent-color: #ffc107;
  --success-color: #28a745;
  --info-color: #17a2b8;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  --dark-color: #343a40;
  --light-color: #f8f9fa;
}

/* Style de base pour WINTECH SOLUTIONS HUB */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
}

/* Placeholder pour les styles personnalisés */
.placeholder-logo {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #2D9CDB, #06B6D4);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    border-radius: 10px;
}

.placeholder-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(45deg, #f8f9fa, #e9ecef);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6c757d;
    font-size: 1.2rem;
    border-radius: 10px;
    border: 2px dashed #dee2e6;
}

.hero-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>') repeat;
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.hero-image {
  text-align: center;
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.card {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: none;
  border-radius: 15px;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.navbar-brand {
  font-size: 1.5rem;
}

.btn {
  border-radius: 25px;
  padding: 10px 25px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.section-title {
  position: relative;
  padding-bottom: 20px;
  margin-bottom: 40px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--accent-color);
  border-radius: 2px;
}

/* Dashboard Styles */
.dashboard-card {
  background: white;
  border-radius: 15px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  transition: transform 0.3s ease;
}

.dashboard-card:hover {
  transform: translateY(-5px);
}

.stats-card {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-radius: 15px;
  padding: 25px;
}

.progress-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  position: relative;
  margin: 0 auto;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-section {
    text-align: center;
    padding: 100px 0 50px;
  }
  
  .display-4 {
    font-size: 2rem;
  }
  
  .hero-image {
    margin-top: 30px;
  }
  
  .hero-image i {
    font-size: 5rem !important;
  }
}

/* Form Styles */
.form-control {
  border-radius: 10px;
  border: 2px solid #e9ecef;
  padding: 12px 15px;
  transition: border-color 0.3s ease;
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(0, 120, 212, 0.25);
}

/* Animation pour le chargement */
.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255,255,255,.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 1s ease-in-out infinite;
}

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

/* Notification styles */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  min-width: 300px;
  border-radius: 10px;
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}