@media only screen and (min-width: 300px) {
  .contenedor {
    width: 300px;
  }
}

@media only screen and (min-width: 320px) {
  .contenedor {
    width: 320px;
  }
}

@media only screen and (min-width: 480px) {
  .contenedor {
    width: 480px;
  }
}

@media only screen and (min-width: 768px) {
  .contenedor {
    width: 480px;
  }
}

@media only screen and (min-width: 992px) {
  .contenedor {
    width: 480px;
  }
}

@media only screen and (min-width: 1200px) {
  .contenedor {
    width: 480px;
  }
}

@media only screen and (min-width: 1366px) {
  .contenedor {
    width: 480px;
  }
}