menu.css

.menu-row {
  display: flex;
  flex-wrap: wrap;
  padding: 0 4px;
}

/* Create three equal columns that sits next to each other */
.three-column {
  flex: 33.333%;
  max-width: 33.333%;
  padding: 0 0px;
}

.three-column img {
  margin-top: 4px;
  margin-bottom: 4px;
  vertical-align: middle;
  width: 100%;
}

.two-column {
  flex: 50%;
  max-width: 50%;
  padding: 0 0px;
}

.two-column img {
  margin-top: 4px;
  margin-bottom: 4px;
  vertical-align: middle;
  width: 100%;
}

.one-column {
  flex: 100%;
  max-width: 100%;
  padding: 0 0px;
}
  
.one-column img {
  margin-top: 4px;
  margin-bottom: 4px;
  vertical-align: middle;
  width: 100%;
}

#third {
  height: 0px;
}

/* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 800px) {
  .three-column {
    -ms-flex: 100%;
    flex: 100%;
    max-width: 100%;
  }
  .two-column {
    -ms-flex: 100%;
    flex: 100%;
    max-width: 100%;
  }
  #full {
    height: 0px;
  }
  #third {
    height: auto;
    -ms-flex: 100%;
    flex: 100%;
    max-width: 100%;
  }
}