:root {
  /* Couleurs principales inspirées d'ARPA3 */
  --primary: #1a1a1a;
  --secondary: #f8f9fa;
  --accent: #0079b8;
  --text-primary: #333333;
  --text-secondary: #666666;
  --success: #28a745;
  --warning: #ffc107;
  --danger: #dc3545;
  --info: #17a2b8;

  /* Ombres et effets */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

/* Style général */
body {
  font-family: 'Inter', sans-serif;
  background-color: #f5f5f5;
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* Navbar */
.navbar {
  background: var(--primary);
  box-shadow: var(--shadow-md);
  padding: 1rem 0;
}

.navbar-brand {
  color: white;
  font-weight: 600;
  font-size: 1.5rem;
  transition: var(--transition);
}

.navbar-brand:hover {
  color: var(--accent);
}

.nav-link {
  color: rgba(255, 255, 255, 0.8);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  transition: var(--transition);
}

.nav-link:hover {
  color: white;
  background: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
  color: white !important;
  background: var(--accent);
}

/* Cards */
.card {
  background: white;
  border-radius: 12px;
  border: none;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  overflow: hidden;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-header {
  background: white;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  padding: 1.25rem;
}

.card-title {
  color: var(--primary);
  font-weight: 600;
  margin: 0;
}

/* Boutons */
.btn {
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-weight: 500;
  transition: var(--transition);
  border: none;
}

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

.btn-primary:hover {
  background: #000;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

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

.btn-accent:hover {
  background: #ff3333;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* Formulaires */
.form-control {
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: 0.75rem 1rem;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 26, 26, 0.1);
}

.form-label {
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

/* Tableaux */
.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.table th {
  background: var(--secondary);
  color: var(--text-primary);
  font-weight: 600;
  padding: 1rem;
  text-align: left;
  border-bottom: 2px solid rgba(0, 0, 0, 0.05);
}

.table td {
  padding: 1rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  color: var(--text-secondary);
}

.table tr:hover td {
  background: rgba(0, 0, 0, 0.02);
}

/* Badges */
.badge {
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.875rem;
}

.badge-success {
  background: rgba(40, 167, 69, 0.1);
  color: var(--success);
}

.badge-warning {
  background: rgba(255, 193, 7, 0.1);
  color: var(--warning);
}

.badge-danger {
  background: rgba(220, 53, 69, 0.1);
  color: var(--danger);
}

/* Alerts */
.alert {
  border-radius: 8px;
  border: none;
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.alert-success {
  background: rgba(40, 167, 69, 0.1);
  color: var(--success);
}

.alert-danger {
  background: rgba(220, 53, 69, 0.1);
  color: var(--danger);
}

/* Login/Register */
.auth-container {
  min-height: calc(100vh - 76px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 0;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

.auth-card .card-header {
  text-align: center;
  padding: 2rem 1.25rem 1.25rem;
}

.auth-card .card-body {
  padding: 1.25rem 2rem 2rem;
}

.auth-logo {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
}

/* Task Form */
.task-form {
  background: white;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

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

.task-form .btn-add-task {
  width: 100%;
  margin-top: 1rem;
}

/* Task List */
.task-list {
  margin-top: 1.5rem;
}

.task-item {
  background: white;
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.task-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.task-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.task-title {
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.task-meta {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

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

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

/* Modals */
.modal-content {
  border-radius: 12px;
  border: none;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  padding: 1.25rem;
}

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

.modal-footer {
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding: 1.25rem;
}

/* Responsive */
@media (max-width: 768px) {
  .navbar .navbar-nav {
    margin-top: 1rem;
  }

  .auth-card {
    margin: 0 1rem;
  }

  .table {
    display: block;
    overflow-x: auto;
  }

  .task-form {
    margin-bottom: 1.5rem;
  }
}

/* Footer */
.footer {
  background: var(--primary);
  color: white;
  padding: 2rem 0;
  margin-top: auto;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  margin-left: 1.5rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: white;
}

@media (max-width: 768px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    margin-top: 1rem;
  }

  .footer-links a {
    margin: 0 0.75rem;
  }
}