a4css.css

 body{
    background-color: antiquewhite;
}

footer{
    text-align: center;
    line-height: 5px;
    font-size: small;
    margin: 10px;
    background-color:darkkhaki;
    background-size: cover;
    padding: 10px;
    padding-top: 20px;
}

footer a{
    color:blueviolet;
}

header{
    text-align: center; 
    padding-top: 5px;
    padding-bottom: 5px;
    margin: 10px;
    animation-name: change;
    animation-duration: 10s;
    animation-iteration-count: infinite;
    animation-direction: alternate-reverse;
}

header h3{
    font-family: monospace;
    overflow: hidden;
    white-space: nowrap;
    animation: typing 5s steps(20, end) forwards;
    font-size: 1.6rem;
    width: 0;
    color: blueviolet;
}

header img{
    animation-name: shake;
    animation-duration: 10s;
    animation-iteration-count: infinite;
}

.grid-container{
    display: grid;
    grid-template-columns: auto auto auto;
    grid-template-rows: auto;
}

.category{
    display: grid;
    grid-column-start:1;
    grid-column-end: 2;
    height: fit-content;
}

#itemlist{
    display: grid;
    grid-column-start: 2;
    grid-column-end: 3;
    text-align: center;
   

}

#cart{
    display: grid;
    grid-column-start: 3;
    grid-column-end: 4;
    width: fit-content;
  
    
}

@keyframes change{
    0% {background-color:antiquewhite; }
    100% {background-color:darksalmon; }
}

@keyframes shake{
    from {transform: rotateY(0deg);}
    to {transform: rotateY(360deg);}
}

@keyframes typing {
    from { width: 0 }
    to { width: 100% }
  }