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HTML

              
                .gallery
	.resizer RESIZE SCREEN
	.items
		- for (i=0; i<36; i++)
				.item
	.pagination
              
            
!

CSS

              
                /*** fixing bug on reflex ***/

:root {
	--c2: #004a6a;
}

body {
	overflow: hidden;
	width: 100vw;
	height: 100vh;
	margin: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	font-family: Arial, Helvetica, serif;
	font-size: 18px;
	background: 
		radial-gradient(circle at 50% 0%, #6cafc3, #fff0), 
		radial-gradient(circle at 50% 100%, #6cafc3, #1a456e);
	* {
		box-sizing: border-box;
	}
}

.gallery {
	display: flex;
	align-items: center;
	flex-direction: column;
	position: relative;
	padding-top: 60px;
	&:before, &:after {
		content: "";
		position: absolute;
		width: 14px;
		height: 14px;
		border: 0 solid #fff;
		border-width: 0 0 3px 3px;
		transform: rotate(45deg);
		left: 15px;
		top: 11px;
		border-radius: 2px;
		opacity: 0.5;
		animation: hide-s 2s ease 6s 1;
		animation-fill-mode: forwards
	}
	&:after {
		left: inherit;
		right: 15px;
		transform: rotate(-135deg);
	}
}


.resizer {
	position: absolute;
	top: 0;
	width: calc(100% - 45px);
	height: 36px;
	overflow: hidden;
	text-align: center;
	color: #fff;
	line-height: 38px;
	font-weight: 500;
	letter-spacing: 1px;
	animation: letter-s 2s ease 0s 3 alternate, hide-s 2s ease 6s 1;
	animation-fill-mode: backwards, forwards;
	opacity: 0.5;
	&:before, &:after {
		content: "";
		position: absolute;
		width: calc(50% - 125px);
		border-bottom: 4px dotted #fff;
		margin-left: 20px;
		top: 18px;
		left: 0;
		animation: lines-s 2s ease 0s 3 alternate;
	}
	&:after {
		right: 15px;
		left: inherit;
		margin-right: 7px;
	}
}

@keyframes letter-s {
	  0% { letter-spacing: 8px; }
	100% { letter-spacing: 1px; }
}

@keyframes lines-s {
	  0% { width: calc(50% - 175px); }
	100% { width: calc(50% - 125px); }
}

@keyframes hide-s {
	  0% { opacity: 0.5; }
	100% { opacity: 0.2; }
}


.item {
	width: calc(236px - 20px);
	height: calc(456px - 20px);
	height: 50vh;
	padding: 10px;
	margin: 10px;
	border-radius: 15px;
	background-repeat:  no-repeat;
	background-position: center;
	background-size: cover;
	overflow: hidden;
	position: relative;
	box-shadow: 0px 2px 3px 1px #0006;
	&:before {
		font-size: 30px;
		line-height: 50px;
		padding-left: 10px;
		mix-blend-mode: exclusion;
		border-radius: 15px;
		content: "";
		position: absolute;
		left: 0;
		top: 0;
		width: 100%;
		height: 100%;
		background: linear-gradient(110deg, #fffd, #fff0 20%, #fff0 70%, #fffd);
		opacity: 1;
		transition: opacity 0.65s ease 0s;
		box-sizing: border-box;
	}
	&:after {
		content: "";
		background-color: #fff9;
		opacity: 0.6;
		top: 0;
		bottom: 0;
		left: -100%;
		position: absolute;
		width: 5vmin;
		box-shadow: 0 0 10vmin 2.5vmin #fff;
		transform: skew(-20deg);
		transition: all 0.25s ease;
	}
	&:hover {
		&:before {
			opacity: 0;
			transition: opacity 0.65s ease 0s;
		}
		&:after {
			left: 400px;
			transition: left 0.5s ease 0s;
		}
	}
}

.item:nth-child(1) {
	background-image: url(https://i.pinimg.com/236x/8c/5c/e2/8c5ce253c92d23f9abe51277cf489ae6.jpg);
}
.item:nth-child(2) {
	background-image: url(https://i.pinimg.com/236x/9a/b8/7d/9ab87d48cea80a765c23334ec158f2cf.jpg);
}
.item:nth-child(3) {
	background-image: url(https://i.pinimg.com/236x/ad/c2/37/adc2373c602fe00ecd70357e97408479.jpg);
}
.item:nth-child(4) {
	background-image: url(https://i.pinimg.com/236x/1c/15/ac/1c15acc30f8052c60e3573700aa8aaa3.jpg);
}
.item:nth-child(5) {
	background-image: url(https://i.pinimg.com/236x/80/3c/c2/803cc273ed79b65394f94b6ac8b52318.jpg);
}
.item:nth-child(6) {
	background-image: url(https://i.pinimg.com/236x/bc/80/f6/bc80f623c3209cc5fd8f00ca0c575233.jpg);
}
.item:nth-child(7) {
	background-image: url(https://i.pinimg.com/236x/37/8e/5e/378e5ec24860c959b1f1d53c5afa7d21.jpg);
}
.item:nth-child(8) {
	background-image: url(https://i.pinimg.com/236x/e7/83/65/e78365d11aff1eda5145a06ea3fa512d.jpg);
}
.item:nth-child(9) {
	background-image: url(https://i.pinimg.com/236x/b5/ff/a3/b5ffa3c375ff78a6c994c911f64c0f51.jpg);
}
.item:nth-child(10) {
	background-image: url(https://i.pinimg.com/236x/1d/7a/d8/1d7ad8d14158c0449956c3629e5ae7a6.jpg);
}
.item:nth-child(11) {
	background-image: url(https://i.pinimg.com/236x/56/5d/7c/565d7c823effb334213d507e0573ea93.jpg);
}
.item:nth-child(12) {
	background-image: url(https://i.pinimg.com/236x/c0/ef/93/c0ef931039a7ab8253f090043d5889b7.jpg);
}
.item:nth-child(13) {
	background-image: url(https://i.pinimg.com/236x/74/25/dd/7425dd8234fb24bc4fad484332f0a4f8.jpg);
}
.item:nth-child(14) {
	background-image: url(https://i.pinimg.com/236x/1d/e3/bb/1de3bb04040d87338ae01f73ee01e836.jpg);
}
.item:nth-child(15) {
	background-image: url(https://i.pinimg.com/236x/b1/6a/67/b16a67e37b37b99352dbbf96e841bf7a.jpg);
}
.item:nth-child(16) {
	background-image: url(https://i.pinimg.com/236x/d7/bf/08/d7bf089a7b117584390dde837b2c9414.jpg);
}
.item:nth-child(17) {
	background-image: url(https://i.pinimg.com/236x/3e/af/50/3eaf50bf42502bd8b9faf009472c6cd8.jpg);
}
.item:nth-child(18) {
	background-image: url(https://i.pinimg.com/236x/64/a2/74/64a27409624f311d1946e250c0a0b1d5.jpg);
}
.item:nth-child(19) {
	background-image: url(https://i.pinimg.com/236x/e7/28/6b/e7286be9975171c528383a62e756c7ca.jpg);
}
.item:nth-child(20) {
	background-image: url(https://i.pinimg.com/236x/65/61/b7/6561b73a47a8364e6ddcd312634cd539.jpg);
}
.item:nth-child(21) {
	background-image: url(https://i.pinimg.com/236x/9e/7b/76/9e7b76fed5c6a4ade7295ba30bb74d68.jpg);
}
.item:nth-child(22) {
	background-image: url(https://i.pinimg.com/236x/1d/63/d6/1d63d645b56e24a5f89456c20a520122.jpg);
}
.item:nth-child(23) {
	background-image: url(https://i.pinimg.com/236x/66/92/b8/6692b83ef675862e41095dadbb7e2e6b.jpg);
}
.item:nth-child(24) {
	background-image: url(https://i.pinimg.com/236x/79/dc/80/79dc809f4e59daf13c55e6db0391b936.jpg);
}
.item:nth-child(25) {
	background-image: url(https://i.pinimg.com/236x/13/5c/dd/135cddfc053ec27f638f61803d65abb4.jpg);
}
.item:nth-child(26) {
	background-image: url(https://i.pinimg.com/236x/25/f6/5e/25f65ed4c62d5baf936c9f5eefb0dbd0.jpg);
}
.item:nth-child(27) {
	background-image: url(https://i.pinimg.com/236x/89/bf/66/89bf6633b5ffb00b76124a93d565faca.jpg);
}
.item:nth-child(28) {
	background-image: url(https://i.pinimg.com/236x/88/ab/95/88ab952b4815b8ec201c0cdb18ab50df.jpg);
}
.item:nth-child(29) {
	background-image: url(https://i.pinimg.com/236x/a9/8c/0d/a98c0dea3ea3725929490816f4bfadae.jpg);
}
.item:nth-child(30) {
	background-image: url(https://i.pinimg.com/236x/a7/2e/77/a72e77c81375e32e6ac35c5432273ce4.jpg);
}
.item:nth-child(31) {
	background-image: url(https://i.pinimg.com/236x/e2/39/22/e23922c486b46bd2b78a507cbc2fadf3.jpg);
}
.item:nth-child(32) {
	background-image: url(https://i.pinimg.com/236x/d4/45/1f/d4451fa753b5b7cf61b0295452a3e216.jpg);
}
.item:nth-child(33) {
	background-image: url(https://i.pinimg.com/236x/66/9c/a0/669ca05b1a32a14724c6060b5b21540b.jpg);
}
.item:nth-child(34) {
	background-image: url(https://i.pinimg.com/236x/df/a3/5b/dfa35b32bada9dacd041b67c5604ac26.jpg);
}
.item:nth-child(35) {
	background-image: url(https://i.pinimg.com/236x/7a/df/5d/7adf5d11c30633b0b8e49b1389ac032d.jpg);
}
.item:nth-child(36) {
	background-image: url(https://i.pinimg.com/236x/6c/3c/c7/6c3cc76b72d7ed861a3d3a166344a88e.jpg);
}




/*** Card Numbers ***/
@for $i from 1 through 36 {
	.item:nth-child(#{$i}):before {
			content: "#{$i}";
	}
}


















/*** Navigation ***/

.pagination { 
	text-align: center;
		ul { 
		padding: 0 0px;
		margin: 10px 0 0;
		background: #fff2;
		border-radius: 10px;
		li { 
			display: inline; 
			display: inline-flex; 
			margin: 5px; 
			color: #fff;
		}
	}
}





.pagination li a { 
	padding: 10px; 
	background: #fffd;
	color: var(--c2);
	text-decoration: none;
	border-radius: 5px;
}

.pagination li.page_link a:hover {
	background: var(--c2);
	color: #fff;
}

.pagination li.active_page a { 
	background: var(--c2); 
	color: #fff;
}

.pagination li > span {
	font-weight: bold;
	font-size: 15px;
	top: -4px;
	position: relative;
}

.pagination li a span {
	min-width: 20px;
	display: inline-block;
}







.pagination li.page_link.active_page.active a {
	cursor: default;
}







li.previous_link a, li.next_link a,
li.first_link a, li.last_link a  {
	background: #fff0;
	/* border: 2px solid #fff; */
	color: #fff0;
	display: block;
	padding: 10px 12px;
}

li.previous_link a:before, li.next_link a:before, 
li.first_link a:before, li.last_link a:before{
	content: "";
	border: 2px solid #fff;
	width: 12px;
	height: 12px;
	display: block;
	position: absolute;
	border-width: 3px 0 0 3px;
	transform: rotate(-45deg);
	margin-top: 3px;
	margin-left: 3px;
	border-radius: 2px;
}

li.next_link a:before,
li.last_link a:before  {
	transform: rotate(135deg);
	margin-left: -3px;
}



li.first_link a:before, li.last_link a:before{
	filter: drop-shadow(5px 5px 0 #fff);
	margin-left: 0px;
}







li.previous_link a:hover, li.next_link a:hover, 
li.first_link a:hover, li.last_link a:hover {
	background: var(--c2);
	border-color: var(--c2);
}






li.no_more.disabled {
	opacity: 0.5;
	pointer-events: none;
}

li.page_link.first.active_page.active a {
	cursor: default;
}



@media screen and (orientation:landscape) and (max-width: 800px) {
	.pagination ul {
		margin-top: 20px;
	}
	.resizer {
		top: 5px;
	}
	.gallery:before, .gallery:after {
    	top: 16px;
	}
}
              
            
!

JS

              
                let itms = 6; // itemsPerPage
let stpg = 1; // startPage
let pltd = 4; // pageLinksToDisplay
let winw = window.innerWidth; 

function optionsByWindowSize() {
	winw = window.innerWidth;
	if (winw > 1600) { itms = 6; stpg = 1; pltd = 4; }
	else if (winw > 1230) { itms = 5; stpg = 2; pltd = 4; }
	else if (winw > 980) { itms = 4; stpg = 3; pltd = 4; }
	else if (winw > 750) { itms = 3; stpg = 4; pltd = 4; }
	else if (winw > 510) { itms = 2; stpg = 5; pltd = 4; }
	else { itms = 1; stpg = 6; pltd = 1; }
}

function reportWindowSize() {
	optionsByWindowSize();
	//purePajination Script - START
	if (document.readyState === "complete") {
		var gallery = new purePajinate({ 
			containerSelector: '.items', 
			itemSelector: '.items > div', 
			navigationSelector: '.pagination',
			/*wrapAround: true,*/ 
			pageLinksToDisplay: pltd,
			showFirstLast: true,
			navLabelPrev: '&nbsp;&nbsp;&nbsp;',
			navLabelNext: '&nbsp;&nbsp;&nbsp;',
			navLabelFirst: '&nbsp;&nbsp;&nbsp;',
			navLabelLast: '&nbsp;&nbsp;&nbsp;',
			itemsPerPage: itms,
			startPage: stpg
		});
	} //purePajination Script - END
}

document.onreadystatechange = reportWindowSize;				
window.onresize = reportWindowSize;
              
            
!
999px

Console