@media screen and (max-width: 900px) {
  #navbar {
    font-size: 12px;
  }
}

@media screen and (max-width: 900px) {
  #inicio {
    width: 90%;
  }
  #title {
    font-size: 20px;
  }
  #sobre {
    width: 90%;
    flex-direction: column;
  }
  #sobre p {
    width: 90%;
    border: none;
    text-align: justify;
    margin-top: 10px;
    margin: 0 auto;
    padding: 0;
  }
  #projetos {
    width: 90%;
  }
  #projetos .cards .card {
    width: 100%;
  }
  #contatos {
    margin-top: 20px;
    margin-bottom: 50px;
    width: 90%;
  }
}

@media screen and (max-width: 900px) {
  #projetos .cards {
    grid-template-columns: 100%;
    justify-items: center;
  }
  #box-contacts {
    flex-direction: column;
  }
}