:root {
  --primary-color: #1F4E79;
  --primary-light: #2E75B6;
  --danger-color: #c82333;
  --success-color: #28a745;
  --warning-color: #ffc107;
}

* {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: #f5f5f5;
}

/* Navbar */
.navbar {
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Sections */
.section-header {
  margin-top: 30px;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-light);
}

.section-header h5 {
  color: var(--primary-color);
  font-weight: 600;
  margin: 0;
}

/* Cards */
.card {
  border: none;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.card-header {
  border-radius: 8px 8px 0 0;
  padding: 15px 20px;
  font-weight: 600;
}

/* Formulaire */
.form-label {
  font-weight: 500;
  color: #333;
  margin-bottom: 8px;
}

.form-control {
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 14px;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.form-control:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 0.2rem rgba(46, 117, 182, 0.25);
}

/* Participants */
.participant-block {
  border: 1px solid #ddd;
  border-radius: 6px;
  margin-bottom: 15px;
}

.participant-block .card-body {
  padding: 15px;
}

.participant-title {
  color: var(--primary-color);
  font-weight: 600;
}

/* Boutons */
.btn {
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.3s ease;
}

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

.btn-primary:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(46, 117, 182, 0.3);
}

.btn-secondary {
  background-color: #6c757d;
  border-color: #6c757d;
}

.btn-secondary:hover {
  background-color: #5a6268;
  border-color: #545b62;
}

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

.btn-danger:hover {
  background-color: #a71d2a;
  border-color: #9d1b27;
}

/* Alertes */
.alert {
  border-radius: 6px;
  border: none;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.alert-success {
  background-color: #d4edda;
  color: #155724;
}

.alert-danger {
  background-color: #f8d7da;
  color: #721c24;
}

.alert-info {
  background-color: #d1ecf1;
  color: #0c5460;
}

.alert.hide {
  display: none;
}

.alert.show {
  display: block;
}

/* Input files */
.custom-file-input {
  display: block;
}

.text-danger {
  color: #dc3545 !important;
  font-weight: bold;
}

/* Responsive */
@media (max-width: 768px) {
  .section-header {
    margin-top: 20px;
  }

  .participant-block {
    margin-bottom: 10px;
  }

  .btn {
    width: 100%;
    margin-bottom: 10px;
  }

  .form-control {
    font-size: 16px;
  }
}

/* Tables */
.table {
  background-color: white;
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.table thead th {
  background-color: var(--primary-light);
  color: white;
  border: none;
  font-weight: 600;
  padding: 12px;
}

.table tbody tr:hover {
  background-color: #f8f9fa;
}

.table tbody td {
  padding: 12px;
  vertical-align: middle;
}

/* Badges */
.badge {
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
}

.badge-status {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 4px;
  font-weight: 600;
}

/* Footer */
footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #ddd;
}

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

.fade-in {
  animation: fadeIn 0.3s ease-in-out;
}

/* Scrollbar personnalisée */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
  background: var(--primary-light);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}

/* Modal */
.modal-header {
  background-color: var(--primary-light);
  color: white;
  border: none;
}

.modal-body {
  padding: 20px;
}

/* Utilitaires */
.text-muted {
  color: #6c757d !important;
}

.small {
  font-size: 0.875rem;
}

.highlight {
  background-color: var(--warning-color);
  padding: 2px 4px;
  border-radius: 3px;
}