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CSS

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HTML 

              
                .device
	nav
		span.is-active
		a.home(href="#")
			i.fas.fa-home
		a.search(href="#")
			i.fas.fa-search
		a.about(href="#")
			i.fas.fa-bell
			span.badge 7
		a.profile.active(href="#")
			i.fas.fa-user
	.pages
		.comp.comp-home
			header
				h1 home
			section
				p content
			footer
				small footer
		.comp.comp-search
			header
				h1 search
			section
				p content
			footer
				small footer
		.comp.comp-about
			header
				h1 about
			section
				p content
			footer
				small footer
		.comp.comp-profile.is-active
			header 
				h1 Joshua Ward
				.avatar
			.details
				.followers
					h3 1325
					span followers
				.following
					h3 1985
					span following
				.Favorites
					h3 1111
					span favorites
			section
				h5 posts
				.feed
					.feed-item
						.user
							.user-avatar
						.post
							span.user-name Gary Busey &nbsp;
							span.user-handle @garybusey &nbsp;
							span.post-date
								span.date 13 
								span.month January 
								span.year 2019 
								span.time 15:43 
							p.content Busey ipsum dolor sit amet. It's OK to get Rib-grease on your face, because you're allowing people to see that you're proud of these ribs. Did you feel that?
					.feed-item
							.user
								.user-avatar
							.post
								span.user-name Gary Busey &nbsp;
								span.user-handle @garybusey &nbsp;
								span.post-date
									span.date 13 
									span.month January 
									span.year 2019 
									span.time 15:43 
								p.content Busey ipsum dolor sit amet. It's OK to get Rib-grease on your face, because you're allowing people to see that you're proud of these ribs. Did you feel that?
					.feed-item
						.user
							.user-avatar
						.post
							span.user-name Gary Busey &nbsp;
							span.user-handle @garybusey &nbsp;
							span.post-date
								span.date 13 
								span.month January 
								span.year 2019 
								span.time 15:43 
							p.content Busey ipsum dolor sit amet. It's OK to get Rib-grease on your face, because you're allowing people to see that you're proud of these ribs. Did you feel that?
					.feed-item
						.user
							.user-avatar
						.post
							span.user-name Gary Busey &nbsp;
							span.user-handle @garybusey &nbsp;
							span.post-date
								span.date 13 
								span.month January 
								span.year 2019 
								span.time 15:43 
							p.content Busey ipsum dolor sit amet. It's OK to get Rib-grease on your face, because you're allowing people to see that you're proud of these ribs. Did you feel that?
					.feed-item
							.user
								.user-avatar
							.post
								span.user-name Gary Busey &nbsp;
								span.user-handle @garybusey &nbsp;
								span.post-date
									span.date 13 
									span.month January 
									span.year 2019 
									span.time 15:43 
								p.content Busey ipsum dolor sit amet. It's OK to get Rib-grease on your face, because you're allowing people to see that you're proud of these ribs. Did you feel that?
					.feed-item
						.user
							.user-avatar
						.post
							span.user-name Gary Busey &nbsp;
							span.user-handle @garybusey &nbsp;
							span.post-date
								span.date 13 
								span.month January 
								span.year 2019 
								span.time 15:43 
							p.content Busey ipsum dolor sit amet. It's OK to get Rib-grease on your face, because you're allowing people to see that you're proud of these ribs. Did you feel that?
				.loading-more
					i.fas.fa-sync-alt
			footer
				a(href="#") posts
				a(href="#") posts with replies
				a(href="#") favorites
				a(href="#") media
!

CSS 

              
                $base-duration: 250ms;

// Colors
$primary: #4DB6AC;
$accent: #46627f;
$white: whitesmoke;
$light-gray: #999;
$active: #3498db;
$red: #e74c3c;

// Breakpoints
$sm: 20rem;
$med: 48rem;
$lg: 64rem;

// fonts
$sans-serif: 'Roboto', sans-serif;
$slab-serif: 'Roboto Slab', serif;

*, *:before, *:after {
	box-sizing: border-box;
	outline: none;
}

html {
	font-family: $sans-serif;
	font-size: 16px;
	font-smooth: auto;
	font-weight: lighter;
	line-height: 1.5;
	color: #444;
}

body {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	height: 100vh;
}

h1, h2, h3, h4, h5 {
	font-family: $slab-serif;
}

p {
	margin-top: 0 !important;
}

.device {
	position: relative;
	display: block;
	width: 375px;
	height: 667px;
	background-color: lighten($primary,10%);
	border-radius: 10px;
	box-shadow: 0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22);
	overflow: hidden;
}

.badge {
	position: absolute;
	display: flex;
	align-items: center;
	justify-content: center;
	top: 10px;
	right: 10px;
	width: 15px;
	height: 15px;
	padding-top: 1px;
	background-color: $red;
	//border: 1px solid white;
	border-radius: 50%;
	box-shadow: 1px 1px 0 darken($accent,5%);
	font-size: 10px;
	font-weight: bold;
	line-height: 1;
	z-index: 99;
	.active & {
		color: $white;
	}
}

.pages {
	position: relative;
	display: block;
	width: 100%;
	height: 100%;
	.comp {
		position: relative;
		display: none;
		flex-direction: column;
		align-items: flex-start;
		justify-content: flex-start;
		width: 100%;
		height: 100%;
		margin: 0;
		padding: 0 0 60px;
		background-color: lighten($accent,30%);
		transform: translateX(0%);
		transition: 0.25s;
		animation: slideIn 0.25s ease;
		&.is-active {
			display: flex;
		}
		&-home {
			
		}
		&-search {
			
		}
		&-about {
			
		}
		&-profile {
			.details {
				position: relative;
				display: flex;
				align-items: center;
				justify-content: space-around;
				width: 100%;
				padding: 20px 100px 20px 0;
				background-color: $white;
				> div {
					display: flex;
					flex-direction: column;
					align-items: center;
					justify-content: center;
					text-align: center;
					> span {
						font-size: 12px;
					}
				}
				h3 {
					margin: 0;
					padding: 0;
					color: $primary;
					font-size: 16px;
					font-weight: 700;
				}
			}
		}
		
		header {
			position: relative;
			display: flex;
			align-items: center;
			justify-content: space-between;
			flex: 0 0 10%;
			width: 100%;
			padding: 10px 15px;
			background-color: $primary;
			background-image: url('https://images.pexels.com/photos/459225/pexels-photo-459225.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=750&w=1260');
			background-position: center center;
			background-repeat: no-repeat;
			background-size: cover;
			&:before {
				position: absolute;
				content: '';
				top: 0;
				left: 0;
				width: 100%;
				height: 100%;
				background-color: rgba($primary,0.8);
				z-index: 0;
			}
			h1 {
				margin: 0;
				padding: 0;
				color: $white;
				font-size: 28px;
				text-shadow: 1px 1px $accent;
				animation: headingSlide 0.5s linear;
				z-index: 1;
			}
			.avatar {
				position: relative;
				width: 100px;
				height: 100px;
				margin-top: 60px;
				background-image: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/50325/profile/profile-80.jpg?100000');
				background-position: center center;
				background-repeat: no-repeat;
				background-size: cover;
				border-radius: 50%;
				border: 5px solid white;
				box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
				text-align: center;
				transform: translateY(0%);
				animation: avatarSlide 0.5s ease;
				z-index: 99;
				span {
					position: absolute;
					bottom: -30px;
					left: 50%;
					width: 100%;
					color: $light-gray;
					font-size: 11px;
					transform: translateX(-50%);
					i {
						margin-left: 2px;
					}
				}
			}
		}
		section {
			position: relative;
			display: flex;
			flex-direction: column;
			flex: 0 1 auto;
			width: 100%;
			padding: 10px 15px 0;
			background-color: white;
			overflow-y: scroll;
			h5 {
				margin: 0;
				//background: red;
				color: $light-gray;
				text-transform: uppercase;
			}
			.feed {
				position: relative;
				flex: 1 0 auto;
				width: 100%;
				//height: 100%;
				.feed-item {
					position: relative;
					display: flex;
					align-items: flex-start;
					width: 100%;
					padding: 15px 10px;
					border-bottom: 1px solid lighten($light-gray,30%);
					.user {
						position: relative;
						display: flex;
						align-items: center;
						flex: 0 1 50px;
						padding-right: 10px;
						&-avatar {
							position: relative;
							display: flex;
							align-items: center;
							justify-content: center;
							width: 40px;
							height: 40px;
							background-color: lightgray;
							border: 3px solid $white;
							border-radius: 50%;
							box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
							&:before {
								position: absolute;
								content: '\f007';
								font-family: "Font Awesome 5 Free";
								font-size: 12px;
							}
						}
					}
					
					.post {
						position: relative;
						font-size: 12px;
						.user-name {
							font-weight: bold;
						}
						.user-handle {
							font-weight: bold;
							color: $primary;
						}
						.post-date {
							color: $light-gray;
						}
						p.content {
							margin: 0;
						}
					}
				}
			}
		}
		footer {
			position: relative;
			display: flex;
			align-items: center;
			justify-content: space-around;
			flex: 0 0 auto;
			width: 100%;
			padding: 3px 20px;
			background-color: $white;
			> a {
				color: $primary;
				font-size: 12px;
				text-decoration: none;
			}
		}
	}
}

@keyframes slideIn {
	0%   { transform: translateX(-100%); }
	100% { transform: translateX(0%); }
}

@keyframes headingSlide {
	0%   { transform: translateX(-100%); }
	50%  { transform: translateX(30%); }
	75%  { transform: translateX(-30%); }
	100% { transform: translateX(0); }
}

@keyframes avatarSlide {
	0%   { transform: translateY(-300%); }
	100% { transform: translateY(0%); }
}

nav {
	position: absolute;
	bottom: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 375px;
	height: 60px;
	background-color: lighten($accent,10%);
	//border-radius: 0 0 8px 8px;
	box-shadow: 0 0 3px rgba(0,0,0,0.12), 0 0 2px rgba(0,0,0,0.24);
	overflow: hidden;
	z-index: 9999;
	// &:before {
	// 	position: absolute;
	// 	content: '';
	// 	top: -5px;
	// 	left: 0;
	// 	width: 100%;
	// 	height: 5px;
	// 	background-color: rgba($accent,0.4);
	// }
	span.is-active {
		position: absolute;
		top: 0;
		left: 75%;
		width: 25%;
		height: 100%;
		background-color: $white;
		box-shadow: 0 0 10px 0 rgba(black,0.4);
		transition: left 0.25s ease-in-out;
		z-index: 0;
		&:before {
			position: absolute;
			content: '';
			top: 0;
			left: 0;
			width: 100%;
			height: 5px;
			background-color: $primary;
			z-index: 1;
		}
	}
	a {
		position: relative;
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
		width: 25%;
		height: 100%;
		padding: 0;
		color: $white;
		text-decoration: none;
		&.active {
			color: $primary;
		}
		> i {
			font-size: 18px;
		}
		> div {
			font-size: 12px;
		}
	}
} 

.loading-more {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 30px 0;
	color: $primary;
	animation: spinner 1s linear infinite;
}

@keyframes spinner {
	100% { transform: rotate(360deg);}
}
!

JS 

              
                $('nav').find('a').click(function() {
	$('nav').find('a.active').removeClass('active');
	$(this).addClass('active');
	if($('a.active').is('.search')) {
		$('span.is-active').css('left','25%');
	} else if($('a.active').is('.about')) {
		$('span.is-active').css('left','50%');
	} else if($('a.active').is('.profile')) {
		$('span.is-active').css('left','75%');
	} else {
		$('span.is-active').css('left','0%');
	}
	if($('.search').is('.active')) {
		$('.pages').find('.is-active').removeClass('is-active');
		$('.comp-search').addClass('is-active');
	} else if($('.about').is('.active')) {
		$('.pages').find('.is-active').removeClass('is-active');
		$('.comp-about').addClass('is-active');
	} else if($('.profile').is('.active')) {
		$('.pages').find('.is-active').removeClass('is-active');
		$('.comp-profile').addClass('is-active');
	} else {
		$('.pages').find('.is-active').removeClass('is-active');
		$('.comp-home').addClass('is-active');
	};
});
!
999px

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