#menu ul {
  position: relative;
  text-align: center;
  padding-left: 0;
}

.element{
  display: inline-block;
  padding: 8px;
}

.category{
  background: #FFFF00;
  margin: 0 100px;
}

img.thumbnail{
  width: 160px;
  height: 160px;
  padding: 2px;
  //image-rendering: pixelated;
}

.detail-img-90{
  width: 90%;
  height: 90%;
  padding: 0 0 12px 0;
}

img.thumbnail-20{
  width: 20%;
  height: 20%;
  padding: 2px;
  //image-rendering: pixelated;
}

.caution{
  font-size: 0.9em;
}

@media screen and (max-width:759px) {
  img.thumbnail{
    width: 80px;
    height: 80px;
  }
  .element{
    padding: 4px;
    font-size: 0.9em;
  }
}