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HTML 

              
                <section>
	<header>
		<figure class="branding"></figure>
		<nav class="menu--main">
			<ul class="menu">
				<li class="menu-item"><a href="#">Menu Item 1</a></li>
				<li class="menu-item"><a href="#">Menu Item 2</a></li>
				<li class="menu-item"><a href="#">Menu Item 3</a></li>
				<li class="menu-item"><a href="#">Menu Item 4</a></li>
			</ul>
		</nav>
		<div id="block-headermeta">
			<a href="#" id="search"><i class="fa fa-search"></i></a>
		</div>
	</header>
	<div id="full-search-area">
		<div class="searchbar">
			<figure class="searchbar__branding"></figure>
			<div class="searchbar__text">
				<input type="search" class="search-example" placeholder="office chair, places to focus, etc." autofocus />
			</div>
			<div class="searchbar__close">
				<button>&times;</button>
			</div>
		</div>
		<div id="results" class="results">
			<div class="results__product fade-content row">
				<h3 class="col-12">Most Relevant Results</h3>
				<figure class="col-6 col-sm-3">
					<img src="https://picsum.photos/800/450" alt="" class="img-fluid" />
					<figcaption>Rowan</figcaption>
				</figure>
				<figure class="col-6 col-sm-3">
					<img src="https://picsum.photos/800/450" alt="" class="img-fluid" />
					<figcaption>Elani</figcaption>
				</figure>
				<figure class="col-6 col-sm-3">
					<img src="https://picsum.photos/800/450" alt="" class="img-fluid" />
					<figcaption>Lona</figcaption>
				</figure>
				<figure class="col-6 col-sm-3">
					<img src="https://picsum.photos/800/450" alt="" class="img-fluid" />
					<figcaption>All Products</figcaption>
				</figure>
			</div>
			<div class="results__additional row">
				<div class="col-12 col-sm-6 fade-content">
					<h3>Additional Products</h3>
					<ul class="fade-content">
						<li><a href="#">Heya</a></li>
						<li><a href="#">Qove</a></li>
						<li><a href="#">Madrid</a></li>
					</ul>
				</div>
				<div class="col-12 col-sm-6 fade-content">
					<h3>Additional Resources</h3>
					<ul class="fade-content">
						<li><a href="#">Products by designers</a></li>
						<li><a href="#">Downloads</a></li>
						<li><a href="#">Products by application</a></li>
					</ul>
				</div>
			</div>
			<div class="results__cancel">
				<button type="button" id="cancel" class="btn btn-sm btn-secondary">Cancel</button>
			</div>
		</div>
		
	</div>
	<div id="mainpage"></div>
</section>
!

CSS 

              
                // @import "compass";
@import url('https://fonts.googleapis.com/css?family=Montserrat:300,400,700');

// COLOR VARIABLES
$color__primary: #796e65;
$color__primary--light: #aca39a;
$color__primary--lighter: #cbc4bc;
$color__white: #f6f5f4;

// EASY MIXINS
@mixin inline-link() {
	// Body copy links should look like this
	// doesn't have to be a mxin, just seems easier
	position: relative;
	display: inline-block;
	color: inherit;
	text-decoration: none;
	&::after {
		content: "";
		position: absolute;
		top: 100%;
		left: 0;
		background-color: $color__primary--light;
		width: 100%;
		height: 1px;
		margin: 0 auto;
		opacity: 0.33;
		transform: scaleX(0.9);
		transform-origin: left;
		transition: opacity 150ms, transform 150ms;
	}
	&:hover,
	&:focus {
		color: inherit;
		text-decoration: none;
		&::after {
			opacity: 1;
			transform: scaleX(1);
		}
	}
}
@mixin body-copy() {
	font-weight: 300;
	widows: 3;
	orphans: 3;
}

body {
	color: $color__primary;
}

.main-title {
	font-size: 54px;
	font-weight: 700;
}

h1, h2, h3, h4, h5, h6 {
	margin-bottom: .75em;
}

p {
	@include body-copy();
	a {
		@include inline-link();
	}
}

b, strong { font-weight: 700; }
i, em { font-weight: 300; }

ul, ol, dl {
	@include body-copy();
}

.menu--main {
	// fade out
	.menu-item {
		opacity: 1;
		transform: translateY(0);
		transition: 150ms;
		&.exiting { // fade menu items down
			opacity: 0;
			transform: translateY(30px);
		}
	}
	// small color fade decoration
	// should probably be added to larger parent if at all
	.menu-item a {
		transition: 150ms; // or whatever is default
	}
	&:hover {
		.menu-item a {
			color: $color__primary--lighter;
			&:hover { color: $color__primary; }
		}
	}
}

#full-search-area {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	display: none;
	background-color: fade-out(#000, 0.5);
	z-index: 500;
	.searchbar {
		position: relative;
		background-color: #fff;
		width: 100%;
		height: 85px;
		padding: 20px 30px;
		&__branding {
			height: 85px;
		}
		&__text {
			position: absolute;
			top: 0;
			left: 150px;
			right: 85px;
			display: inline-block;
			height: 85px;
			[type="search"] {
				display: block;
				color: inherit;
				border: 0;
				font-size: 1.5em;
				font-weight: 300;
				height: 100%;
				width: 100%;
				padding: 0;
				padding-right: 30px;
				appearance: none !important;
				&:focus {
					outline: 0;
				}
				&::placeholder {
					color: $color__primary--lighter;
				}
			}
			
			// fade in
			opacity: 0;
			transform: translateX(30px);
			transition: 300ms;
			transition-delay: 150ms;
			&.fade-left {
				opacity: 1;
				transform: translateX(0);
			}
		}
		&__close {
			position: absolute;
			top: 0;
			right: 0;
			height: 85px;
			padding-top: 20px;
			padding-right: 30px;
			button {
				appearance: none;
				color: $color__primary--lighter;
				border: 0;
				background: none;
				font-size: 2em;
				padding: 0;
				margin: 0;
				transition: 150ms;
				&:hover,
				&:focus {
					color: $color__primary;
				}
			}
		}
	}
	.results {
		// display: none;
		position: relative;
		background-color: #fff;
		margin: 1px auto 0;
		padding: 30px;
		width: 75%;
		max-width: 1024px;
		opacity: 0;
		transform: translateY(30px);
		transition: all 300ms;
		&.fading {
			opacity: 1;
			transform: translateY(0);
		}
		h3 {
			color: $color__primary--lighter;
			font-size: .75em;
			font-weight: 700;
			text-transform: uppercase;
		}
		ul {
			margin: 0;
			padding: 0;
			list-style: none;
			li {
				margin-bottom: 3px;
				a {
					@include inline-link();
					font-size: 1.5em;
				}
			}
		}
		&__product {
			figure {
			}
			figcaption {
				font-weight: 700;
				text-align: center;
			}
		}
		&__additional {
			margin-bottom: 1.5em;
		}
	}
}

.fade-content > * {
	opacity: 0;
	transform: translateY(30px);
	transition: opacity 50ms, transform 300ms;
	&:nth-of-type(2) { transition-delay:  50ms; }
	&:nth-of-type(3) { transition-delay: 100ms; }
	&:nth-of-type(4) { transition-delay: 150ms; }
	&:nth-of-type(5) { transition-delay: 200ms; }
	.fading & {
		opacity: 1;
		transform: translateY(0);
	}
}

// DEMO ONLY

body {
	background-color: $color__white;
	font-family: Montserrat;
	margin: 2em;
}

* {
	box-sizing: border-box;
}

#search {
	color: $color__primary--light;
	&:hover,
	&:focus {
		color: $color__primary;
	}
}

section {
	position: relative;
	background-color: #fff;
	border-radius: 6px;
	box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
	max-width: 1440px;
	margin: 0 auto;
}

header {
	position: relative;
	width: 100%;
	height: 85px;
	padding: 20px 30px;
	border-bottom: 1px $color__white solid;
	.branding {
		display: inline-block;
		background-color: $color__white;
		width: 100px;
		height: 100%;
		margin: 0;
	}
	.menu--main {
		display: inline-block;
		margin-right: 20px;
		.menu {
			position: absolute;
			top: 0;
			height: 85px;
			line-height: 85px;
			margin: 0 0 0 20px;
			padding: 0;
			&-item {
				display: inline-block;
				font-size: 1em;
				text-transform: uppercase;
				height: 85px;
				margin: 0;
				margin-right: 28px;
				padding: 0;
				a {
					color: $color__primary;
					font-size: 11px;
					font-weight: 700;
					text-decoration: none !important;
					letter-spacing: .033rem;
				}
			}
		}
	}
	#block-headermeta {
		position: absolute;
		top: 0;
		right: 30px;
		line-height: 85px;
		height: 85px;
		z-index: 400;
	}
}

#full-search-area {
	.searchbar__branding {
		display: inline-block;
		background-color: $color__white;
		width: 100px;
		height: 100%;
		margin: 0;
	}
}

#mainpage {
	background-color: $color__primary--lighter;
	width: 100%;
	min-height: 500px;
	border-bottom-left-radius: 6px;
	border-bottom-right-radius: 6px;
}
!

JS 

              
                $(document).ready(function() {
	
	$('#search').on('click touchstart', function() {
		$('#full-search-area, #resultsToggle').fadeIn(150);
		$('.menu--main .menu-item').addClass('exiting');
		$('.searchbar__text').addClass('fade-left');
		$('input.search-example').focus();
	});
	
	function checkForInput(element) {
		if ($(element).val().length > 0) {
			$('#results').addClass('fading');
		} else {
			$('#results').removeClass('fading');
		}
	}
	$('input.search-example').each(function() {
		checkForInput(this);
	});
	$('input.search-example').on('change keyup', function() {
		checkForInput(this);
	});
	
	$('.searchbar__close button, #cancel').on('click touchstart', function() {
		$('#full-search-area').fadeOut(150);
		$('.searchbar__text').removeClass('fade-left');
		$('.menu--main .menu-item').removeClass('exiting');
	});

});
!
999px

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