body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      margin: 0;
      padding: 0;
      background: #f9f9f9;
      color: #333;
    }

    header {
      background: #4fa1d0;
      color: white;
      text-align: center;
      padding: 1rem;
    }

    .logo-cst, .logo-bene7 {
      width: 65%;
      object-fit: contain;
    } 

    .container {
      max-width: 800px;
      margin: 2rem auto;
      padding: 1rem;
    }

    .step-by-step {
      background-color: rgba(136, 211, 249, 0.584);
    }

    /* Barra de progresso */
    .progress-container {
      width: 100%;
      /* background: #ddd; */
      background: #fff;
      border-radius: 20px;
      overflow: hidden;
      margin: 1.5rem 0 1.5rem 0;
    }

    .progress-bar {
      height: 12px;
      width: 0%;
      background: #4fa1d0;
      transition: width 0.4s ease;
    }

    /* Indicadores de passos */
    .step-indicators {
      display: flex;
      justify-content: space-between;
      margin-bottom: 1.5rem;
    }

    #btn-IRPF, #btn-rSIM {
      white-space: normal;
      overflow-wrap: break-word!important;
    }

    .indicator {
      width: 35px;
      height: 35px;
      border-radius: 50%;
      /* background: #ddd; */
      background: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #555;
      cursor: pointer;
      transition: background 0.3s, color 0.3s, transform 0.2s;
    }

    .indicator:hover {
      transform: scale(1.1);
    }

    .indicator.active {
      background: #4fa1d0;
      color: white;
    }

    .step {
      display: none;
      overflow: hidden;
      background: white;
      padding: 2rem;
      border-radius: 8px;
      box-shadow: 0 2px 6px rgba(0,0,0,0.1);
      animation: fadeIn 0.5s ease-in-out;
    }

    .step.active {
      display: block;
    }

    .step img {
      width: 100%;
      max-height: 768px;
      object-fit: contain;
    }

    .img-tela {
      display: flex;
      justify-content: center;
      align-items: center;
      overflow: hidden;
      /* border: #333 solid 1px; */
      box-shadow: 3px 3px 8px 1px rgba(0, 0, 0, 0.2);
    }

    .a-right {
      text-align: right!important;
    }       
    .a-left {
      text-align: left!important;
    }  

    .aviso {
      position: fixed;
      width: 100%;
      padding: 15px;
      left: 0;
      bottom: 0;
      text-align: center;
      color: #fff;
      background-color: #4fa1d0;
    }
    .buttons {
      display: flex;
      justify-content: space-between;
      margin-top: 1rem;
    }

    button {
      transition: background 0.3s;
    }

    button:hover {
      background: #45a049;
    }

    @keyframes fadeIn {
      from {opacity: 0;}
      to {opacity: 1;}
    }

    @media (max-width: 768px) {
      .logo-cst, .logo-bene7 {
        width: 100%;
        object-fit: contain;
      }    
    }

    @media (max-width: 576px) {
      .step {
        padding: 1rem;
      }
      button {
        flex: 1;
        margin: 0 0.5rem;
      }
      .step-indicators {
        justify-content: center;
        gap: 0.5rem;
      }
      .logo-bene7 {
        display: none;
      }    
      .a-center {
        text-align: center!important;
      }          
    }