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Insecure Resource

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HTML 

              
                <ul class="gallery">
	<li>
		<figure>
			<a href="#"><img src="https://images.unsplash.com/photo-1539137571959-2fef8104f030" alt="Gallery item"></a>
			<figcaption>
				<h1>Hawaiian Islands</h1>
				<p>by Logan Lambert</p>
			</figcaption>
		</figure>
	</li>
	<li class="tall">
		<figure>
			<a href="#"><img src="https://images.unsplash.com/photo-1539054588416-1f7089399ca3" alt="Gallery item"></a>
			<figcaption>
				<h1>Castle in the Sky</h1>
				<p>by Shounen21</p>
			</figcaption>
		</figure>
	</li>
	<li>
		<figure>
			<a href="#"><img src="https://images.unsplash.com/photo-1539013646821-b8c1e125b390" alt="Gallery item"></a>
			<figcaption>
				<h1>Sublimate of Materiality</h1>
				<p>by Andras Kovacs</p>
			</figcaption>
		</figure>
	</li>
	<li class="wide">
		<figure>
			<a href="#"><img src="https://images.unsplash.com/photo-1539025880297-e054842a8290" alt="Gallery item"></a>
			<figcaption>
				<h1>Reflection, sunshine, shadow and rock HD</h1>
				<p>by Salmen Bejaoui</p>
			</figcaption>
		</figure>
	</li>
	<li class="tall">
		<figure>
			<a href="#"><img src="https://images.unsplash.com/photo-1538973430467-f2e0297c8f46" alt="Gallery item"></a>
			<figcaption>
				<h1>Enchantment</h1>
				<p>by Casey Horner</p>
			</figcaption>
		</figure>
	</li>
	<li>
		<figure>
			<a href="#"><img src="https://images.unsplash.com/photo-1538942242243-71708b9bb270" alt="Gallery item"></a>
			<figcaption>
				<h1>Torres</h1>
				<p>by Benjamin Kraus</p>
			</figcaption>
		</figure>
	</li>
</ul>
!

CSS 

              
                /* Layout specific styles. */
body {
	padding: 1rem;
}

.gallery {
	display: grid;
	list-style-type: none;
	padding: 0;
	margin: 0;
	grid-gap: 1rem;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	grid-auto-rows: 300px;
	grid-auto-flow: dense;
}

.gallery li figure {
	margin: 0;
	width: 100%;
	height: 100%;
	position: relative;
}

.wide {
	grid-column: span 2;
}

.tall {
	grid-row: span 2;
}

img {
	width: 100%;
	height: 100%;
	display: block;
	object-fit: cover;
}

/* Hover effect specific styles. */
.gallery li figure {
	overflow: hidden;
}

.gallery img {
	transition: all .3s ease-in-out;
	transform: scale(1.2);
}

.gallery figure figcaption {
	position: absolute;
	top: 5%;
	left: 5%;
	width: 90%;
	height: 90%;
	display: grid;
	align-content: center;
	text-align: center;
	pointer-events: none;
	border: 1px solid #fff;
	color: #fff;
	text-shadow: 1px 1px 1px rgba(0, 0, 0, .3);
	transition: all .3s ease-in-out;
	transform: scale(1.2);
}

.gallery figure h1,
.gallery figure p {
	opacity: 0;
	transition: all .4s;
}

.gallery figure h1 {
	transform: translate3d(0, -1rem, 0);
	margin: 0;
	font-size: 21px;
}


.gallery figure p {
	font-size: 13px;
	transform: translate3d(0, 1rem, 0);
}

.gallery figure:hover img {
	filter: grayscale(100%);
	transform: scale(1);
}

.gallery figure:hover figcaption {
	transform: scale(1);
}

.gallery figure:hover figcaption h1,
.gallery figure:hover figcaption p {
	opacity: 1;
	transform: translate3d(0, 0, 0);
}
!

JS
!
999px

Console