@media all and (max-width: 768px) {
  #menu_btn.is_close {
    margin-top: 2em;
  }
}
@media all and (max-width: 458px) {
  #menu nav a {
    font-size: 1.4em;
  }

  table.screen_change {
    display: block;
  }
  table.screen_change tr, table.screen_change th, table.screen_change td {
    display: inline-flex;
    flex-direction: column;
    width: 100% !important;
  }
  table.screen_change th {
    font-size: 0.9em;
    padding: 0.4em !important;
  }
  table.screen_change th * {
    font-size: 0.9em;
  }
}
@media all and (max-width: 390px) {
  #menu_btn.is_close {
    margin-top: 1em;
  }

  #menu nav {
    padding-top: 7em;
  }
}
@media all and (max-width: 375px) {
  #menu nav a {
    font-size: 1.2em;
  }
  #menu nav a:after {
    font-size: 0.8rem;
  }
}