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CSS

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HTML 

              
                <div class="flex-container">
	<div class="spinner"><p>
		<div class="cube1"></div>
		<div class="cube2"></div>
		Loading...
		</p>
	</div>
	<div class="flex-slide home">
		<div class="flex-title flex-title-home">Home</div>
		<div class="flex-about flex-about-home"><p>Click here to navigate to the home section of the website</p></div>
	</div>
	<div class="flex-slide about">
		<div class="flex-title">About</div>
		<div class="flex-about"><p>Click here to navigate to the About section of the website</p></div>
	</div>
	<div class="flex-slide work">
		<div class="flex-title">Work</div>
		<div class="flex-about"><p>Listing relevant snippets of work:</p>
			<ul>
				<li>First piece of work</li>
				<li>Second piece of work</li>
				<li>Third piece of work</li>
			</ul>
		</div>
	</div>
	<div class="flex-slide contact">
		<div class="flex-title">Contact</div>
				<div class="flex-about">
					<p>Use the contact form below</p>
					<form class="contact-form">
						<p>Email <input type="text" name="email"></p>
						<p>Comment <textarea type="text" name="comment" row="5"></textarea></p>
						<p><input type="submit" name="email" value="Send Message"></p>
					</form>

		</div>
	</div>
</div>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css?family=Raleway');

$defaultSeconds: 3s;

body {
	margin: 0;
	padding: 0;
	font-family: 'Raleway', sans-serif;
}
.flex-container {
	position: absolute;
	height: 100vh;
	width: 100%;
	display: -webkit-flex; /* Safari */
	display: flex;
	overflow: hidden;
	@media screen and (max-width: 768px) {
		flex-direction: column;
	}
}
.flex-title {
	color: #f1f1f1;
	position: relative;
	font-size: 6vw;
	margin: auto;
	text-align: center;
	transform: rotate(90deg);
	top: 15%;
	-webkit-transition: all 500ms ease;
	-moz-transition: all 500ms ease;
	-ms-transition: all 500ms ease;
	-o-transition: all 500ms ease;
	transition: all 500ms ease;
	@media screen and (max-width: 768px) {
		transform: rotate(0deg) !important;
	}
}
.flex-about {
	opacity: 0;
	color: #f1f1f1;
	position: relative;
	width: 70%;
	font-size: 2vw;
	padding: 5%;
	top: 20%;
	border: 2px solid #f1f1f1;
	border-radius: 10px;
	line-height: 1.3;
	margin: auto;
	text-align: left;
	transform: rotate(0deg);
	-webkit-transition: all 500ms ease;
	-moz-transition: all 500ms ease;
	-ms-transition: all 500ms ease;
	-o-transition: all 500ms ease;
	transition: all 500ms ease;
	@media screen and (max-width: 768px) {
		padding: 0%;
		border: 0px solid #f1f1f1;
	}
}


.flex-slide {
	-webkit-flex: 1;  /* Safari 6.1+ */
	-ms-flex: 1;  /* IE 10 */    
	flex: 1;
	cursor: pointer;
	-webkit-transition: all 500ms ease;
	-moz-transition: all 500ms ease;
	-ms-transition: all 500ms ease;
	-o-transition: all 500ms ease;
	transition: all 500ms ease;
	@media screen and (max-width: 768px) {
		overflow: auto;
		overflow-x: hidden;
	}
}
.flex-slide p {
	@media screen and (max-width: 768px) {
		font-size: 2em;
	}
} 
.flex-slide ul li {
	@media screen and (max-width: 768px) {
		font-size: 2em;
	}
} 
.flex-slide:hover {
	-webkit-flex-grow: 3;
	flex-grow: 3;
}
.home {
	height: 100vh;
	background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/769286/lake-macquarie-71208_1920.jpg);
	background-size: cover;
	background-position: center center;
	background-attachment: fixed;
	@media screen and (min-width: 768px) {
		animation: aboutFlexSlide $defaultSeconds 1;
		animation-delay: 0s;
	}
}

@keyframes aboutFlexSlide {
	0% {
		-webkit-flex-grow: 1;
		flex-grow: 1;
	}
	50% {
		-webkit-flex-grow: 3;
		flex-grow: 3;
	}
	100% {
		-webkit-flex-grow: 1;
		flex-grow: 1;
	}
}

.flex-title-home {
	@media screen and (min-width: 768px) {
		transform: rotate(90deg);
		top: 15%;
		animation: aboutFlexSlide $defaultSeconds 1;
		animation-delay: 0s;
	}
}



@keyframes homeFlextitle {
	0% {
		transform: rotate(90deg);
		top: 15%;
	}
	50% {
		transform: rotate(0deg);
		top: 15%;
	}
	100% {
		transform: rotate(90deg);
		top: 15%;
	}
}

.flex-about-home {
	opacity: 0;
	@media screen and (min-width: 768px) {
		animation: aboutFlexSlide $defaultSeconds 1;
		animation-delay: 0s;
	}
}

@keyframes flexAboutHome {
	0% {
		opacity: 0;
	}
	50% {
		opacity: 1;
	}
	100% {
		opacity: 0;
	}
}



.about {
	background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/769286/beach-2089959_1280.jpg);
	background-size: cover;
	background-position: center center;
	background-attachment: fixed;	
}
.contact-form {
	width: 100%;
}
input {
	width: 100%;
}
textarea {
	width: 100%;	
}
.contact {
		background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/769286/lake-696098_1920.jpg);
	background-size: cover;
	background-position: center center;
	background-attachment: fixed;
}
.work {
		background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/769286/forest-208517_1280.jpg);
	background-size: cover;
	background-position: center center;
	background-attachment: fixed;
}



// Preloader
.spinner {
	position: fixed;
	top: 0;
	left: 0;
	background: #222;
	height: 100%;
	width: 100%;
	z-index: 11;
	margin-top: 0;
	color: #fff;
	font-size: 1em;
}

.cube1, .cube2 {
  background-color: #fff;
  width: 15px;
  height: 15px;
  position: absolute;
  top: 0;
  left: 0;
  
  -webkit-animation: sk-cubemove 1.8s infinite ease-in-out;
  animation: sk-cubemove 1.8s infinite ease-in-out;
}

.cube2 {
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}

@-webkit-keyframes sk-cubemove {
  25% { -webkit-transform: translateX(42px) rotate(-90deg) scale(0.5) }
  50% { -webkit-transform: translateX(42px) translateY(42px) rotate(-180deg) }
  75% { -webkit-transform: translateX(0px) translateY(42px) rotate(-270deg) scale(0.5) }
  100% { -webkit-transform: rotate(-360deg) }
}

@keyframes sk-cubemove {
  25% { 
    transform: translateX(42px) rotate(-90deg) scale(0.5);
    -webkit-transform: translateX(42px) rotate(-90deg) scale(0.5);
  } 50% { 
    transform: translateX(42px) translateY(42px) rotate(-179deg);
    -webkit-transform: translateX(42px) translateY(42px) rotate(-179deg);
  } 50.1% { 
    transform: translateX(42px) translateY(42px) rotate(-180deg);
    -webkit-transform: translateX(42px) translateY(42px) rotate(-180deg);
  } 75% { 
    transform: translateX(0px) translateY(42px) rotate(-270deg) scale(0.5);
    -webkit-transform: translateX(0px) translateY(42px) rotate(-270deg) scale(0.5);
  } 100% { 
    transform: rotate(-360deg);
    -webkit-transform: rotate(-360deg);
  }
}
!

JS 

              
                (function(){
	$('.flex-container').waitForImages(function() {
		$('.spinner').fadeOut();
	}, $.noop, true);
	
	$(".flex-slide").each(function(){
		$(this).hover(function(){
			$(this).find('.flex-title').css({
				transform: 'rotate(0deg)',
				top: '10%'
			});
			$(this).find('.flex-about').css({
				opacity: '1'
			});
		}, function(){
			$(this).find('.flex-title').css({
				transform: 'rotate(90deg)',
				top: '15%'
			});
			$(this).find('.flex-about').css({
				opacity: '0'
			});
		})
	});
})();
!
999px

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