body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background: #f5f5f5;
  }
 
  /* Modal shell */
  #cartModal .modal-content {
    border: none;
    border-radius: 2px;
  }
  #cartModal .modal-header {
    border-bottom: none;
    padding: 24px 28px 0 28px;
  }
  #cartModal .modal-title {
    font-size: 22px;
    font-weight: 700;
    color: #111;
  }
  #cartModal .btn-close {
    font-size: 12px;
  }
 
  /* Step indicator */
  .step-indicator {
    display: flex;
    gap: 20px;
    padding: 18px 28px 0 28px;
    font-size: 14px;
    color: #aaa;
  }
  .step-indicator .step-label {
    cursor: default;
  }
  .step-indicator .step-label.active {
    color: #111;
    font-weight: 700;
    text-decoration: underline;
  }
 
  /* Body */
  #cartModal .modal-body {
    padding: 20px 28px 24px 28px;
    border-bottom: 1px solid #eee;
    min-height: 170px;
  }
  .step-panel {
    display: none;
  }
  .step-panel.active {
    display: block;
  }
  .step-panel h3 {
    font-size: 19px;
    font-weight: 700;
    color: #111;
    margin-bottom: 12px;
  }
  .step-panel p {
    font-size: 15px;
    line-height: 1.5;
    color: #3a6fb5;
    margin-bottom: 0;
  }
 
  /* Footer */
  #cartModal .modal-footer {
    border-top: none;
    padding: 16px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
   .footer-left#back_Btn {
    font-size: 14px;
    color: #333;
    text-decoration: underline;
    cursor: pointer;
    visibility: hidden;
  }
   .footer-left.visible#back_Btn {
    visibility: visible;
  }
  .footer-right {
    display: flex;
    gap: 12px;
    margin-left: auto;
  }
 
  .btn-secondary-guide {
    background: #e3e3e3;
    color: #111;
    border: none;
  }
  .btn-secondary-guide:hover {
    background: #d6d6d6;
    color: #111;
  }
  .btn-dark-next {
    background: #111;
    border: none;
  }
  .btn-dark-next:hover {
    background: #000;
  }