Crear una galería en google sites

<!DOCTYPE html>
<!-- Design by jonathancanales-->
<html lang="en">
<head>
  <title>Galeria con Filtros</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <style media="screen">
 
body{
	line-height: 1.5;
	font-family: sans-serif;
}
*{
	margin:0;
	box-sizing: border-box;
}
.container{
	max-width: 1170px;
	margin:auto;
}
.row{
	display: flex;
	flex-wrap: wrap;
}
img{
	max-width: 100%;
	vertical-align: middle;
}
/*.gallery*/
.gallery{
	width: 100%;
	display: block;
	min-height: 100vh;
	background-color: #2a2932;
	padding: 100px 0;
}
.gallery .gallery-filter{
	padding: 0 15px;
	width: 100%;
	text-align: center;
	margin-bottom: 40px;
}
.gallery .gallery-filter .filter-item{
	color: #ffffff;
	font-size: 17px;
  border: 2px solid white;
	text-transform: uppercase;
	display: inline-block;
  border-radius: 20px;
  margin-right: 8px;
	cursor: pointer;
  padding: 8px 20px 8px 20px;
	line-height: 1.2;
	transition: all 0.3s ease;
}
.gallery .gallery-filter .filter-item.active{
	color: white;
	border-color : #16b5ef;
  background: #16b5ef;
}
.gallery .gallery-item{
	width: calc(100% / 3);
	padding: 15px;
 
}
.gallery .gallery-item-inner img{
	width: 100%;
  border: 3px solid #d4dad9;
}
.gallery .gallery-item.show{
	animation: fadeIn 0.5s ease;
}
@keyframes fadeIn{
	0%{
		opacity: 0;
	}
	100%{
		opacity: 1;
	}
}
.gallery .gallery-item.hide{
	display: none;
}
 
/*responsive*/
@media(max-width: 491px){
	.gallery .gallery-item{
		width: 50%;
	}
}
@media(max-width: 467px){
    .gallery .gallery-item{
		width: 100%;
	}
	.gallery .gallery-filter .filter-item{
		margin-bottom: 10px;
	}
}
 
  </style>
</head>
<body>
 
<section class="gallery">
	<div class="container">
		<div class="row">
			<div class="gallery-filter">
				<span class="filter-item active" data-filter="all">Todos</span>
				<span class="filter-item" data-filter="watch">Relojes</span>
				<span class="filter-item" data-filter="headphone">Audífonos</span>
				<span class="filter-item" data-filter="camera">Cámaras</span>
                                                               <span class="filter-item" data-filter="shoe">Zapatillas</span>
                                                              <span class="filter-item" data-filter="phone">Celulares</span>
			</div>
		</div>
		<div class="row">
			<!-- gallery item start -->
			<div class="gallery-item shoe">
				<div class="gallery-item-inner">
					<img src="https://i.postimg.cc/VLGLkJ4G/shoe-1.jpg" alt="shoe">
				</div>
			</div>
			<!-- gallery item end -->
                              <!-- gallery item start -->
			<div class="gallery-item shoe">
				<div class="gallery-item-inner">
					<img src="https://i.postimg.cc/bNmZCNXf/zapatillas-negra.png" alt="shoe">
				</div>
			</div>
			<!-- gallery item end -->
			<!-- gallery item start -->
			<div class="gallery-item headphone">
				<div class="gallery-item-inner">
					<img src="https://i.postimg.cc/6QGQSBrH/headphone-1.jpg" alt="headphone">
				</div>
			</div>
			<!-- gallery item end -->
			<!-- gallery item start -->
			<div class="gallery-item camera">
				<div class="gallery-item-inner">
					<img src="https://i.postimg.cc/fWvR12dh/camera-1.jpg" alt="camera">
				</div>
			</div>
			<!-- gallery item end -->
			<!-- gallery item start -->
			<div class="gallery-item headphone">
				<div class="gallery-item-inner">
					<img src="https://i.postimg.cc/3N3JdpP6/headphone-2.jpg" alt="headphone">
				</div>
			</div>
			<!-- gallery item end -->
			<!-- gallery item start -->
			<div class="gallery-item camera">
				<div class="gallery-item-inner">
					<img src="https://i.postimg.cc/wTTjzX5R/camera-2.jpg" alt="camera">
				</div>
			</div>
			<!-- gallery item end -->
      			<div class="gallery-item phone">
      				<div class="gallery-item-inner">
      					<img src="https://i.postimg.cc/26R5NgTC/phone-1.jpg" alt="phone">
      				</div>
      			</div>
 
			<div class="gallery-item camera">
				<div class="gallery-item-inner">
					<img src="https://i.postimg.cc/LXt89v0L/camera-3.jpg" alt="camera">
				</div>
			</div>
 
			<div class="gallery-item watch">
				<div class="gallery-item-inner">
					<img src="https://i.postimg.cc/0jZ5mjvN/watch-1.jpg" alt="watch">
				</div>
			</div>
 
			<!-- gallery item start -->
			<div class="gallery-item watch">
				<div class="gallery-item-inner">
					<img src="https://i.postimg.cc/dVhQkJxq/watch-2.jpg" alt="watch">
				</div>
			</div>
			<!-- gallery item end -->
 
                                             <!-- gallery item start -->
			<div class="gallery-item watch">
				<div class="gallery-item-inner">
					<img src="https://i.postimg.cc/5thFVxSK/RELOJ-HOMBRE.png" alt="watch">
				</div>
			</div>
			<!-- gallery item end -->
		</div>
	</div>
</section>
 
<script>
 
 
 const filterContainer = document.querySelector(".gallery-filter"),
 galleryItems = document.querySelectorAll(".gallery-item");
 
 filterContainer.addEventListener("click", (event) =>{
   if(event.target.classList.contains("filter-item")){
   	 // deactivate existing active 'filter-item'
   	 filterContainer.querySelector(".active").classList.remove("active");
   	 // activate new 'filter-item'
   	 event.target.classList.add("active");
   	 const filterValue = event.target.getAttribute("data-filter");
   	 galleryItems.forEach((item) =>{
       if(item.classList.contains(filterValue) || filterValue === 'all'){
       	item.classList.remove("hide");
       	 item.classList.add("show");
       }
       else{
       	item.classList.remove("show");
       	item.classList.add("hide");
       }
   	 });
   }
 });
</script>
</body>
</html>