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HTML 

              
                <header class="container">
	<div class="border">
		<h1 id="title">Elegant Borders</h1>
	</div>
</header>

<div id="tidy-blog">

	<h2>Tidy Design Tutorial</h2>
	<p>Check out our previous blog posts:</p>

	<div class="posts">
		
		<a class="post" href="https://www.tidydesign.com/blog/2018/09/curtain-mobile-nav/">
			<div class="post-photo"></div>
			<span class="post-title">Curtain Mobile Nav</span>
		</a>
	
		<a class="post" href="https://www.tidydesign.com/blog/2018/09/creating-a-responsive-svg-overlay/">
			<div class="post-photo"></div>
			<span class="post-title">Creating a Responsive SVG Overlay</span>
		</a>

		<a class="post" href="https://www.tidydesign.com/blog/2018/08/creating-a-cut-out-text-effect/">
			<div class="post-photo"></div>
			<span class="post-title">Creating a Cut Out Text Effect</span>
		</a>

	</div>

</div>
!

CSS 

              
                /* Tutorial Styles */
.container {
	padding: 0 2em;
}

.border {
	position: relative;
	width: 100%;
	max-width: 550px;
	height: 340px;
	background-color: #ccaeb9;
}

.border::before,
.border::after {
	content: '';
	position: absolute;
	border: solid 2px #ccaeb9;
}

.border::before {
	left: -20px;
	width: calc(100% + 40px);
	height: 100%;
}
.border::after {
	top: -20px;
	width: 100%;
	height: calc(100% + 40px);
}

/* Page Set Up */
*, ::after, ::before {
    box-sizing: border-box;
}
body {
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	text-rendering: auto;
	overflow-x: hidden;
}

header {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	height: 700px;
	padding: 4em;
	background-image: url('https://images.unsplash.com/photo-1520807616252-353d3e81dca6?ixlib=rb-0.3.5&s=b073789d572720d9e913fb13c15978da&auto=format&fit=crop&w=2100&q=80');
	background-size: cover;
	background-position: center;
}
.border {
	display: flex;
	align-items: center;
	justify-content: center;
}
#title {
	margin: 0;
	font-family: 'Dancing Script', cursive;
	color: #d2d0ce;
	font-size: 2.75rem;
	text-align: center;
}


#tidy-blog {
	padding: 0 1em;
}

h2 {
	margin-top: 1.25em;
	font-size: 1.75rem;
	text-transform: uppercase;
}

h2, p, a {
	font-family: 'Montserrat', sans-serif;
	text-align: center;
}

h2, a {
	color: #3086B9;
}

p {
	line-height: 1.6;
	margin-bottom: 1.25em;
}

a {
	text-decoration: none;
}

/* Post Boxes */
.posts {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	max-width: 1200px;
	margin: 0 auto;
}
.post {
	display: block;
	width: 100%;
	max-width: 400px;
	margin: 0 auto 1.5em;
	background-color: #3086b9;
	border-radius: 8px;
	overflow: hidden;
	transition: all .45s;
	text-align: center;
}
.post:hover {
	transform: scale(1.025);
}
.post-photo {
	padding-bottom: 53.5%;
	background-position: center;
	background-size: cover;
}
.post:nth-of-type(1) .post-photo {
	background-image: url('https://www.tidydesign.com/blog/wp-content/uploads/2018/09/curtain-mobile-nav-tidy-design.jpg');
}
.post:nth-of-type(2) .post-photo {
	background-image: url('https://www.tidydesign.com/blog/wp-content/uploads/2018/09/waves-12.jpg');
}
.post:nth-of-type(3) .post-photo {
	background-image: url('https://www.tidydesign.com/blog/wp-content/uploads/2018/08/cutout-2.jpg');
}

.post-title {
	display: block;
	padding: 1em .5em;
	color: #fff;
}

@media screen and (min-width: 768px) {
	#title {
		font-size: 2.75rem;
		text-align: center;
	}
	
	h2 {
		font-size: 3rem;
		margin-bottom: .35em;
	}
	
	.posts {
		margin: 2em auto;
	}
	.post {
		max-width: 540px;
		width: 48%;
	}
	
}

@media screen and (min-width: 1020px) {
	.post {
		width: 30%;
	}
}
!

JS
!
999px

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