aside {
  width: 250px;
  height: 100vh;
  margin-left: 480px;
  margin-top: 0px;
  }
  
.grid{
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  gap: 5px;
  flex-wrap: wrap;
  margin-left: -100px;
  margin-top: 0px;
  z-index: 3;
}
  
.grid-item{
  background-color: #acd7e5;
  border: 4px double gray;
  width: 100%;
  padding: 10px;
  box-sizing: border-box;
}
  
.grid-item a{
  font-size: 1.2rem;
}
  
main{
  width: 600px;
  height: auto;
}

.main-grid-item{
  background-color: #acd7e5;
  border: 4px double gray;
  width: 100%;
  padding: 10px;
  box-sizing: border-box;
}

.base {
  position: relative;       
}

.graphics-left {
  position: absolute;
  left: 0px;
  top: 0px;
  height: auto;
  width: 350px;
  }
  
.graphics-right {
  position: absolute;
  left: 1200px;
  top: 0px;
  height: auto;
  width: 300px;
  overflow-x: hidden;
  }
  
  .gif {
    position: absolute;
}

.gif img {
  width: 240px;
  transform-origin: center;
  animation: spin 4s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}