body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
  }
  .contact-us {
    padding: 40px 0;
  }
  .container {
    /*max-width: 1100px;*/
    margin: auto;
    padding: 0 20px;
  }
  .contact-row {
    display: flex;
    flex-wrap: wrap;
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-radius: 8px;
    overflow: hidden;
  }
  /* Columna Izquierda: Chat estilo WhatsApp */
  .whatsapp-column {
    flex: 1 1 100%;
    max-width: 100%;
    background: #ECE5DD;
    display: flex;
    flex-direction: column;
    padding: 20px;
    box-sizing: border-box;
  }
  .chat-header {
    background-color: #25D366;
    color: #fff;
    padding: 10px 15px;
    display: flex;
    align-items: center;
  }
  .chat-header img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    margin-right: 10px;
  }
  .chat-header h2 {
    font-size: 1.2rem;
    margin: 0;
  }
  .chat-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 15px;
    overflow-y: auto;
    border: 1px solid #ccc;
    margin-top: 10px;
    background: #fff;
  }
  .bubble {
    max-width: 70%;
    padding: 10px 15px;
    margin-bottom: 8px;
    border-radius: 15px;
    font-size: 0.95rem;
    line-height: 1.4;
    word-wrap: break-word;
  }
  .received {
    align-self: flex-start;
    background: #fff;
    border-top-left-radius: 0;
    color: #333;
  }
  .sent {
    align-self: flex-end;
    background: #DCF8C6;
    border-top-right-radius: 0;
    color: #333;
  }
  .chat-footer {
    display: flex;
    align-items: center;
    padding: 10px;
    background: #F7F7F7;
    border-top: 1px solid #ccc;
    margin-top: 10px;
  }
  .chat-input {
    flex: 1;
    border-radius: 20px;
    border: 1px solid #ccc;
    padding: 8px 12px;
    font-size: 1rem;
    margin-right: 10px;
    outline: none;
  }
  .chat-send-btn {
    background-color: #25D366;
    color: #fff;
    border: none;
    outline: none;
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    transition: opacity 0.2s ease;
  }
  .chat-send-btn:hover {
    opacity: 0.9;
  }
  /* Columna Central: Separador */
  .separator {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin: 20px auto;
    box-sizing: border-box;
  }
  .separator strong {
    font-size: 1.5rem;
  }
  /* Columna Derecha: Formulario */
  .form-column {
    flex: 1 1 100%;
    max-width: 100%;
    padding: 40px;
    box-sizing: border-box;
  }
  .form-column h3 {
    margin-bottom: 20px;
    color: #222;
    font-size: 1.5rem;
  }
  .contact-form .form-group {
    margin-bottom: 15px;
  }
  .input-custom,
  .textarea-custom {
    width: 100%;
    padding: 10px;
    border-radius: 4px;
    border: 1px solid #ccc;
    font-size: 0.95rem;
  }
  .btn {
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 4px;
    border: none;
  }
  .btn-primary {
    background-color: #FF385C;
    color: #fff;
    font-size: 1rem;
    margin-top: 10px;
  }
  .btn-primary:hover {
    opacity: 0.9;
  }
  /* Media Query para escritorio: tres columnas en la misma fila */
  @media (min-width: 768px) {
    .whatsapp-column {
      flex: 0 0 40%;
      max-width: 40%;
    }
    .separator {
      flex: 0 0 5%;
      max-width: 5%;
      margin: 0;
    }
    .form-column {
      flex: 0 0 55%;
      max-width: 55%;
    }
  }