<div class="btn from-top">From Top</div>
<div class="btn from-left">From Left</div>
<div class="btn from-right">From Right</div>
<div class="btn from-center">From Center</div>
<div class="btn from-bottom">From Bottom</div>

/* ~~~~~~~ INIT. BTN ~~~~~~~ */

.btn {		
	position: relative;	
	padding: 1.4rem 4.2rem;
	padding-right: 3.1rem;
	font-size: 1.4rem;
	color: var(--inv);
	letter-spacing: 1.1rem;
	text-transform: uppercase;
	transition: all 500ms cubic-bezier(0.77, 0, 0.175, 1);	
	cursor: pointer;
	user-select: none;
}

.btn:before, .btn:after {
	content: '';
	position: absolute;	
	transition: inherit;
	z-index: -1;
}

.btn:hover {
	color: var(--def);
	transition-delay: .5s;
}

.btn:hover:before {
	transition-delay: 0s;
}

.btn:hover:after {
	background: var(--inv);
	transition-delay: .35s;
}

/* From Top */

.from-top:before, 
.from-top:after {
	left: 0;
	height: 0;
	width: 100%;
}

.from-top:before {
	bottom: 0;	
	border: 1px solid var(--inv);
	border-top: 0;
	border-bottom: 0;
}

.from-top:after {
	top: 0;
	height: 0;
}

.from-top:hover:before,
.from-top:hover:after {
	height: 100%;
}

/* From Left */

.from-left:before, 
.from-left:after {
	top: 0;
	width: 0;
	height: 100%;
}

.from-left:before {
	right: 0;
	border: 1px solid var(--inv);
	border-left: 0;
	border-right: 0;	
}

.from-left:after {
	left: 0;
}

.from-left:hover:before,
.from-left:hover:after {
	width: 100%;
}

/* From Right */

.from-right:before, 
.from-right:after {
	top: 0;
	width: 0;
	height: 100%;
}

.from-right:before {
	left: 0;
	border: 1px solid var(--inv);
	border-left: 0;
	border-right: 0;	
}

.from-right:after {
	right: 0;
}

.from-right:hover:before,
.from-right:hover:after {
	width: 100%;
}

/* From center */

.from-center:before {
	top: 0;
	left: 50%;
	height: 100%;
	width: 0;
	border: 1px solid var(--inv);
	border-left: 0;
	border-right: 0;
}

.from-center:after {
	bottom: 0;
	left: 0;
	height: 0;
	width: 100%;
	background: var(--inv);
}

.from-center:hover:before {
	left: 0;
	width: 100%;
}

.from-center:hover:after {
	top: 0;
	height: 100%;
}

/* From Bottom */

.from-bottom:before, 
.from-bottom:after {
	left: 0;
	height: 0;
	width: 100%;
}

.from-bottom:before {
	top: 0;	
	border: 1px solid var(--inv);
	border-top: 0;
	border-bottom: 0;
}

.from-bottom:after {
	bottom: 0;
	height: 0;
}

.from-bottom:hover:before,
.from-bottom:hover:after {
	height: 100%;
}


/* ~~~~~~~~~~~~ GLOBAL SETTINGS ~~~~~~~~~~~~ */

*, *:before, *:after {
	box-sizing: border-box;
}

body {
	--def: #96B7C4; 	
	--inv: #fff;
	display: flex;
	justify-content: center;
	align-items: center;
	flex-direction: column;
	height: 100vh;
	width: 100%;
	background-image: linear-gradient(-25deg, #616161 0%, #96B7C4 100%);
}

html {
	font-size: 12px;
	font-family: 'Playfair Display', serif;
}

div {margin-bottom: 3rem;}
div:last-child {margin-bottom: 0;}