.toggle-btn {
    border-radius: 20px;
    padding: 10px 20px;
    border: 1px solid #ccc;
    cursor: pointer;
    transition: 0.3s;
    user-select: none;
  }
  .toggle-btn.active {
    background-color: #007bff;
    color: #fff;
    border-color: #007bff;
  }
  .toggle-btn.disabled {
    background: #f3f3f3;
    color: #aaa;
    cursor: not-allowed;
  }
  .sim-service {
    border: 1px solid #ddd;
    border-radius: 15px;
    padding: 8px 16px;
    margin: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
  }
  .sim-service.active {
    background: #198754;
    color: white;
    border-color: #198754;
  }
  .fade-slide {
    transition: all 0.3s ease;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
  }
  .fade-slide.show {
    opacity: 1;
    max-height: 600px;
  }
  .invalid-feedback {
    display: none;
  }
  .is-invalid ~ .invalid-feedback {
    display: block;
  }