how to specify css for smaller screen

@media screen and (min-width: 1400px) {
  .container {
    width: 1370px;
  }
}
@media screen and (min-width: 1600px) {
  .container {
    width: 1570px;
  }
}
@media screen and (min-width: 1900px) {
  .container {
    width: 1870px;
  }
}