.main-box {
  z-index: 9999;
  padding: 0 1rem;
  margin-right: 0.5rem;
  width: calc(100vw - 2rem);
}

@media only screen and (min-width: 600px) {
  .main-box {
    width: 60vw;
  }
}

@media only screen and (min-width: 768px) {
  .main-box {
    width: 40vw;
  }
}

@media only screen and (min-width: 1200px) {
  .main-box {
    width: 25vw;
  }
}