style.css

html,
body {
	margin: 0;
	padding: 0;
	background-color: #eee;
	font-family: sans-serif;
}

/* #loading {
	position: fixed;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	transition: .5s;
	background-color: #fff;
	z-index: 1000;
} */

h3 {
	font-weight: normal;
	font-size: 18px;
	padding: 0 10px;
	color: #999;
	margin-bottom: 10px;
}

h3 small {
	font-size: 18px;
}

h3 a {
	text-decoration: none;
	color: #666;
	transition: .9s;
	font-weight: bold;
}

h3 a:hover {
	color: tomato;
}

h3 a span {
	color: tomato;
	transition: .5s;
}

h3 a:hover span {
	color: #666;
}

#loading.hide {
	opacity: 0;
}

#rss500px {
	padding: 5px;
}

#rss500px:after {
	content: '';
	display: block;
	clear: both;
}

#rss500px a {
	border-radius: 5px;
	margin: 5px;
	width: calc(25% - 10px);
	padding-bottom: 25%;
	display: block;
	overflow: hidden;
	float: left;
	position: relative;
	box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.2);
	transition: .5s;
}

#rss500px a:hover {
	transform: scale(1.05);
	opacity: 0.8;
	z-index: 1;
}

#rss500px a img {
	position: absolute;
	object-fit: cover;
	width: 100%;
	height: 100%;
}