.container-md {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
}

@media (min-width: 576px) {
  .container-md {
    max-width: 540px;
    padding-right: 16px;
    padding-left: 16px;
  }
}

@media (min-width: 768px) {
  .container-md {
    max-width: 768px;
  }
}

@media (min-width: 992px) {
  .container-md {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .container-md {
    max-width: 1200px;
  }
}