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CSS

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JavaScript

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HTML 

              
                <html>
<body>
	<div id="app">
		
		<modal>
			<template slot="callToActionText">
				Test the VueJS modal here
			</template>
			<template slot="modalHeader">
				Sign in to your account
			</template>
			<template slot="modalBody">
				<label>E-mail</label>
				<input type="email" placeholder="[email protected]">
				<label>Password</label>
				<input type="password" placeholder="+8 chars" auto-complete="new-password">
				
			</template>
			<template slot="modalFooter">
				<button class="button">Sign in</button>
			</template>
		</modal>
		
		<script type="text/x-template" id="modal">
			<div class="modal">
				
				<!-- The call to action text -->
				<div class="modal__cta">
					<slot name="callToActionText"></slot>
				</div>
				
				<!-- The modal button -->
				<div class="modal__button">
					<button class="button" @click="click">Open modal</button>
				</div>
				
				<!-- The modal dialog -->
				<div class="modal__dialog" :class="{'active' : active}">
					<div class="modal__content">
						<button class="modal__close" @click="click">
							<i class="fa fa-times"></i>
						</button>
						<h3 class="modal__header">
							<slot name="modalHeader"></slot>
						</h3>
						<div class="modal__body">
							<slot name="modalBody"></slot>
						</div>
						<div class="modal__footer">
							<slot name="modalFooter"></slot>
						</div>
					</div>
				</div>
					
				<!-- The overlay for the modal -->
				<div class="modal__overlay"></div>
			</div>
		</script>
	</div>
	

</body>
</html>
!

CSS 

              
                body, button, input, select
	font-family: 'Catamaran', sans-serif

#app
	display: flex
	justify-content: center
	align-items: center
	height: 100vh

label
	color: rgba(0, 0, 0, .45)
	font-size: 12px
	display: block
input
	border: 1px solid rgba(0, 0, 0, .10)
	background: #ffffff
	box-shadow: none
	color: #000
	padding: 16px
	outline: 0
	margin-bottom: 12px
	border-radius: 2px
	font-weight: 300
	font-size: 11px
	letter-spacing: 1px
	&::placeholder
		color: #c9c9c9
		font-size: 11px
	&:focus
		color: #555555
		background: #ffffff
		border-color: #673ab7

.button 
	cursor: pointer
	background: #673ab7
	border: 0
	border-radius: 50px
	color: #ffffff
	padding: 12px 60px
	font-weight: 700
	font-size: 15px
	outline: 0
	text-transform: uppercase
	margin: 0 auto
	display: table
	&:hover
		background: darken(#673ab7, 5%)

.modal
	display: flex
	justify-content: center
	align-items: center
	min-height: 250px
	flex-direction: column

	&__cta
		margin: 24px 0
		font-size: 24px
		color: rgba(0, 0, 0, .45)

	&__overlay
		position: fixed
		width: 100%
		height: 100%
		visibility: hidden
		top: 0
		left: 0
		z-index: 1000
		opacity: 0
		background: #000000
		transition: all .25s

	&__dialog
		position: fixed
		top: 50%
		left: 50%
		width: 50%
		max-width: 630px
		min-width: 320px
		height: auto
		z-index: 2000
		visibility: hidden
		backface-visibility: hidden
		transform: translateX(-50%) translateY(-50%)
		perspective: 1300px
		&.active 
			opacity: 1
			visibility: visible
			~ .modal__overlay
				opacity: .9
				visibility: visible
			.modal__content
				transform: rotateX(0deg)
				opacity: 1

	&__content
		background: #fafafa
		border-radius: 2px
		padding: 24px
		color: #131313
		position: relative
		transform-style: preserve-3d
		transform: rotateX(-60deg)
		transform-origin: 50% 0
		opacity: 0
		transition: all .25s
		
	&__close
		position: absolute
		right: -16px
		top: -16px
		color: #fff
		background: #673ab7
		border: 0
		outline: 0
		border-radius: 50%
		font-size: 16px
		width: 32px
		height: 32px
		cursor: pointer
	&__header
		text-align: center
		font-weight: 300
		font-size: 24px
		color: rgba(0, 0, 0, .45)
	&__body
		color: #ffffff
		display: flex
		margin: 0 auto
		width: 100%
		max-width: 400px
		flex-direction: column
	&__footer
		margin: 24px 0
!

JS 

              
                Vue.component('modal', {
	template: '#modal',
	data() {
		return {
			active: false
		}
	},
	methods: {
		click(e) {
			this.active =! this.active;
		}
	}
});

new Vue({
	el: '#app'
});
!
999px

Console