.boxes {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-between;
}

.boxes a.box {
  display: block;
  margin: 10px;
  padding: 20px;
  text-align: center;
  text-decoration: none;
  border: 1px solid var(--accent-color);
  border-radius: 5px;
  background-color: rgba(0, 0, 0, 0);
  flex: 1 0 0;
}

.boxes a.box:hover {
  background-color: rgba(0, 0, 0, 0.5);
}