@media only screen and (max-width: 600px) {

  /* Header mais compacto */
  header {
    position: relative;
    height: auto;
    padding: 10px;
  }

  header .container {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  header .container .logo img {
    height: 60px; /* valor único */
    margin: 5px 0;
  }

  /* Main mais leve */
  main {
    padding: 20px 10px;
    top: 0;
  }

  main .principal {
    margin-top: 120px;
    padding: 15px;
  }

  main .principal .card {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }

  main .principal .card h3 {
    margin-bottom: 5px;
    font-size: 1rem;
  }

  main .principal .card a {
    width: 100%;
    max-width: 200px;
  }

  /* Footer simplificado */
  footer {
    padding: 15px 10px;
    justify-content: center;
    text-align: center;
  }

  footer .content {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }

  footer .content .logo-footer {
    flex-wrap: wrap;
    justify-content: center;
  }

  footer .content .logo-footer img {
    height: 40px;
    margin: 5px;
  }

  footer .content .logo-footer img:last-child {
    height: 50px;
    margin-top: 10px;
  }

  footer .logo-footer address a {
    font-size: 13px;
  }

  /* Ajustes extras */
  .centro {
    min-height: 4rem;
  }

  .img-altura {
    display: none;
  }

  .mobileImg {
    display: none;
  }

  .centro-top {
    margin-top: 2rem;
  }
}