:root {
    --primary-color: #4a4a4a;
    --secondary-color: #e1000f;
    --accent-color: #6a6af4;
    --light-bg: #f9f9f9;
    --dark-text: #333333;
    --light-text: #ffffff;
    --border-color: #e7e7e7;
    --success-color: #169b62;
    --warning-color: #ff9940;
  }
  
  body {
    font-family: "Marianne", Arial, sans-serif;
    color: var(--dark-text);
    background-color: #ffffff;
    margin: 0;
    padding: 0;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
  }
  
  /* Navbar */
  .navbar {
    background-color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
  }
  
  .navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .navbar-brand {
    display: flex;
    align-items: center;
  }
  
  .navbar-brand a {
    display: block;
  }
  
  .logo {
    height: auto;
    width: 180px;
    max-width: 100%;
    display: block;
  }
  
  .site-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
  }
  
  .navbar-menu {
    display: flex;
    align-items: center;
  }
  
  .nav-link {
    color: var(--dark-text);
    text-decoration: none;
    padding: 0.5rem 1rem;
    font-weight: 500;
    transition: color 0.2s;
  }
  
  .nav-link:hover,
  .nav-link.active {
    color: var(--accent-color);
  }
  
  .btn-connexion {
    background-color: var(--accent-color);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 4px;
    margin-left: 1rem;
  }
  
  .btn-connexion:hover {
    background-color: #5959d0;
    color: white;
  }
  
  /* Hero Section */
  .hero-section {
    background-color: #f5f5f5;
    color: var(--dark-text);
    padding: 3rem 0;
    margin-bottom: 2rem;
    text-align: center;
  }
  
  .hero-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
  }
  
  .hero-section .lead {
    font-size: 1.25rem;
    opacity: 0.9;
  }
  
  /* Cards */
  .card {
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border: none;
    margin-bottom: 2rem;
    overflow: hidden;
    background-color: white;
  }
  
  .card-header {
    background-color: #fff;
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
  }
  
  .card-header h2,
  .card-header h3 {
    margin: 0;
    font-weight: 600;
    color: var(--primary-color);
  }
  
  .card-body {
    padding: 1.5rem;
    background-color: #fff;
  }
  
  /* Steps Indicator */
  .steps-indicator {
    display: flex;
    margin-bottom: 2rem;
    position: relative;
  }
  
  .steps-indicator::before {
    content: "";
    position: absolute;
    top: 24px;
    left: 40px;
    right: 40px;
    height: 2px;
    background-color: #e0e0e0;
    z-index: 1;
  }
  
  .step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 2;
  }
  
  .step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #e0e0e0;
    color: #666;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 10px;
    font-weight: bold;
    font-size: 1.25rem;
    transition: all 0.3s ease;
  }
  
  .step-label {
    font-size: 0.9rem;
    color: #666;
    transition: all 0.3s ease;
  }
  
  .step.active .step-number {
    background-color: var(--accent-color);
    color: white;
  }
  
  .step.active .step-label {
    color: var(--accent-color);
    font-weight: 600;
  }
  
  /* Form Styling */
  .simulation-form {
    max-width: 100%;
  }
  
  .form-group {
    margin-bottom: 1.5rem;
  }
  
  .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark-text);
  }
  
  .form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    transition: border-color 0.2s;
  }
  
  .form-control:focus {
    border-color: var(--accent-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(106, 106, 244, 0.15);
  }
  
  .form-text {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.875rem;
  }
  
  /* Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 4px;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
  }
  
  .btn-primary {
    background-color: var(--accent-color);
    color: white;
  }
  
  .btn-primary:hover {
    background-color: #5959d0;
  }
  
  .btn-success {
    background-color: var(--success-color);
    color: white;
  }
  
  .btn-success:hover {
    background-color: #0e8a53;
  }
  
  .btn i {
    margin-left: 0.5rem;
  }
  
  .btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
  }
  
  .form-actions {
    margin-top: 2rem;
    display: flex;
    justify-content: flex-end;
  }
  
  /* Result Card */
  .result-card .card-body h2 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
    color: var(--primary-color);
  }
  
  .result-card .card-body h2:first-child {
    margin-top: 0;
  }
  
  .result-card .card-body h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.25rem;
    color: var(--primary-color);
  }
  
  /* Tables */
  .table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  .table {
    width: 100%;
    margin-bottom: 1rem;
    color: var(--dark-text);
    border-collapse: collapse;
  }
  
  .table-bordered {
    border: 1px solid var(--border-color);
  }
  
  .table-bordered th,
  .table-bordered td {
    border: 1px solid var(--border-color);
  }
  
  .table th,
  .table td {
    padding: 0.75rem;
    vertical-align: top;
  }
  
  .table thead th {
    vertical-align: bottom;
    background-color: #f5f5f5;
    font-weight: 600;
  }
  
  .table tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
  }
  
  /* JSON Display */
  .json-display {
    background-color: #f5f5f5;
    padding: 1rem;
    border-radius: 4px;
    overflow: auto;
    font-family: monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    color: #333;
    max-height: 400px;
    white-space: pre-wrap;
  }
  
  /* Info Card */
  .info-card .card-body {
    padding: 1rem;
  }
  
  .info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1.25rem;
    padding: 0.75rem;
    background-color: var(--light-bg);
    border-radius: 6px;
  }
  
  .info-item:last-child {
    margin-bottom: 0;
  }
  
  .info-item i {
    color: var(--accent-color);
    font-size: 1.25rem;
    margin-right: 0.75rem;
    margin-top: 0.25rem;
  }
  
  .info-item p {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.5;
  }
  
  /* Footer */
  .footer {
    background-color: #f5f5f5;
    padding: 3rem 0 1rem;
    margin-top: 3rem;
  }
  
  .footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 2rem;
  }
  
  .footer-section {
    flex: 1;
    min-width: 250px;
    margin-bottom: 1.5rem;
    padding-right: 2rem;
  }
  
  .footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
  }
  
  .footer-section p {
    margin-bottom: 1rem;
    line-height: 1.5;
  }
  
  .footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .footer-section ul li {
    margin-bottom: 0.5rem;
  }
  
  .footer-section ul li a {
    color: var(--dark-text);
    text-decoration: none;
    transition: color 0.2s;
  }
  
  .footer-section ul li a:hover {
    color: var(--accent-color);
  }
  
  .footer-section ul li i {
    margin-right: 0.5rem;
    color: var(--accent-color);
  }
  
  .footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
  }
  
  .footer-bottom p {
    margin: 0;
    font-size: 0.9rem;
    color: #777;
  }
  
  /* Responsive */
  @media (max-width: 992px) {
    .hero-section {
      padding: 2rem 0;
    }
  
    .hero-section h1 {
      font-size: 2rem;
    }
  
    .form-actions {
      justify-content: center;
    }
  
    .btn-lg {
      width: 100%;
    }
  
    .footer-section {
      flex: 0 0 100%;
      padding-right: 0;
    }
  }
  
  @media (max-width: 768px) {
    .navbar .container {
      flex-direction: column;
    }
  
    .navbar-brand {
      margin-bottom: 1rem;
    }
  
    .logo {
      width: 150px;
      margin: 0 auto;
    }
  
    .navbar-menu {
      flex-wrap: wrap;
      justify-content: center;
    }
  
    .nav-link {
      padding: 0.5rem;
      font-size: 0.9rem;
    }
  
    .btn-connexion {
      margin-top: 0.5rem;
      margin-left: 0;
    }
  
    .steps-indicator::before {
      left: 25px;
      right: 25px;
    }
  
    .step-number {
      width: 40px;
      height: 40px;
      font-size: 1rem;
    }
  
    .step-label {
      font-size: 0.8rem;
    }
  }
  
  /* Row and Column Layout */
  .row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -15px;
    margin-left: -15px;
  }
  
  .justify-content-center {
    justify-content: center !important;
  }
  
  .col-lg-8 {
    flex: 0 0 66.666667%;
    max-width: 66.666667%;
    padding-right: 15px;
    padding-left: 15px;
    position: relative;
    width: 100%;
  }
  
  .col-lg-4 {
    flex: 0 0 33.333333%;
    max-width: 33.333333%;
    padding-right: 15px;
    padding-left: 15px;
  }
  
  @media (max-width: 992px) {
    .col-lg-8,
    .col-lg-4 {
      flex: 0 0 100%;
      max-width: 100%;
    }
  }
  
  .mt-4 {
    margin-top: 1.5rem;
  }