.addbutton{
display: grid;
width: 100%;
grid-template-columns: 4fr 1fr 1fr 4fr;
grid-template-rows: 1fr;
grid-template-areas: '. more less .';
}

.more {
  grid-area: more;
  text-align: center;
  margin: 20px;
  z-index: 1;
}
.less {
  grid-area: less;
  text-align: center;
  margin: 20px;
  z-index: 1;
}

button {
  margin: 0 auto;
  background-color: lightslategray;
  border: none;
  cursor: pointer;
  outline: none;
  color: white;
  padding: 0;
  line-height: 40px;
  width: 160px;
  border-radius: 20px;
  text-align: center;
  z-index: 1;
}