@media screen and (min-width: 880px) {
  #main_menu{
    display: block !important;
  }
}

@media screen and (max-width: 879px) {
  .show_menu{
    display: block;
  }

  #main_menu{
    display: none;
  }

  .main_menu{
    width: calc(100% - 30px);
    padding: 3px 15px 10px 0px;
    margin-top: 0px;
    margin-bottom: 0px;
  }

  .main_menu li{
    display: block;
    padding-bottom: 8px;
    padding-top: 8px;
    padding-left: 15px;
    margin-bottom: 5px;
    margin-right: 0px;
    border-bottom: 2px solid rgb(240,240,240);
    border-right: none;
  }

  .main_menu a{
    display: block;
  }

  .main_menu li:not(.active):hover{
    border-bottom-color: rgb(210,210,210);
  }
}

@media screen and (max-width: 800px) {
  #main {
    padding: 0px 5%;
    width: 90%;
  }
}