.cartoes {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  justify-content: space-around;
}

.cartao {
  display: none;
  flex: 0 0 200px;
  margin: 10px;
  border: 1px solid #ccc;
  box-shadow: 2px 2px 6px 0 rgba(0, 0, 0, 0.3);
  border-radius: 20px;
}

.cartao img {
  height: 125px;
  max-width: 100%;
  border-radius: 20px 20px 0 0;
}

.cartao .texto {
  padding: 0 20px 20px;
  text-align: justify;
}

.cartao .texto > button {
  background-color: #999;
  border: none;
  color: white;
  padding: 10px;
  width: 100%;
  cursor: pointer;
}

.cartao .texto > button:hover {
  background-color: #555;
}

aside {
  margin-top: 50px;
  width: 100%;
  display: flex;
  justify-content: center;
}

aside button {
  background-color: #999;
  border: none;
  color: white;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
}

aside button:hover {
  background-color: #555;
}

.ativado {
  display: block;
}