header {
  display: flex;
  width: 100%;
  height: 100px;
  background-color: black;
  align-items: center;
}
 
.title {
  margin-right: auto;
}
 
.menu-item {
  list-style: none;
  display: inline-block;
  padding: 10px;
}

a:hover img{
  opacity: 0.6;
  transition-duration: 0.3s;
}

.gridbox1 {
      display: grid;
      grid-template-columns: 220px 220px 220px 220px;
      grid-template-rows : 220px 220px 220px 220px 220px;
    }
    .gridbox1 p {
      background-color: black;
      margin: 20px;
    }
    .gridbox1 p:nth-child(2n+1) {
      color: white;
      background-color: black;
      margin: 20px;
    }

a {
  color: gray;
  text-decoration: none;
}

a:hover {
  color: white;
  text-decoration: none;

footer {
  width: 100%;
  height: 40px; 
  text-align: center;
  padding: 50px 0;
  background-color: black;
  color: white;
  clear:both;
}