Modal css

  <link href="https://s3-us-west-2.amazonaws.com/s.cdpn.io/1462889/unicons.css" rel="stylesheet">

  <div class="section full-height">
	<input class="modal-btn" type="checkbox" id="modal-btn" name="modal-btn"/>
	<label for="modal-btn">Open Modal <i class="uil uil-expand-arrows"></i></label> 		
	<div class="modal">		
		<div class="modal-wrap">	
		  <img src="https://assets.codepen.io/1462889/sl3.jpg" alt="">	
			<p>Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old.</p>	          		
		</div>			          		
	</div>	
</div>

@import url('https://fonts.googleapis.com/css?family=Poppins:400,500,600,700,800,900');
*,
*::before,
*::after {
  box-sizing: border-box;
}
body{
	font-family: 'Poppins', sans-serif;
	font-weight: 400;
	font-size: 15px;
	line-height: 1.7;
	color: #1f2029;
  	background-color: #fff;
  overflow: hidden;
  background-image: url('https://assets.codepen.io/1462889/back-page.svg');
  background-position: center;
  background-repeat: no-repeat;
  background-size: 101%;
}
p{
	font-family: 'Poppins', sans-serif;
	font-weight: 400;
	font-size: 16px;
	line-height: 1.7;
	color: #1f2029;
}

.section{
  position: relative;
  width: 100%;
  display: block;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  -ms-flex-pack: center;
  justify-content: center;
}
.full-height{
  min-height: 100vh;
}

[type="checkbox"]:checked,
[type="checkbox"]:not(:checked){
  position: absolute;
  left: -9999px;
}
.modal-btn:checked + label,
.modal-btn:not(:checked) + label{
  position: relative;
  font-family: 'Poppins', sans-serif;
  font-weight: 500;
  font-size: 15px;
  line-height: 2;
  height: 50px;
  transition: all 200ms linear;
  border-radius: 4px;
  width: 240px;
  letter-spacing: 1px;
  display: -webkit-inline-flex;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -webkit-align-items: center;
  -moz-align-items: center;
  -ms-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  -moz-justify-content: center;
  -ms-justify-content: center;
  justify-content: center;
  -ms-flex-pack: center;
  text-align: center;
    -ms-flex-item-align: center;
    align-self: center;
  border: none;
  cursor: pointer;
  background-color: #102770;
  color: #ffeba7;
  box-shadow: 0 12px 35px 0 rgba(16,39,112,.25);
}
.modal-btn:not(:checked) + label:hover{
  background-color: #ffeba7;
  color: #102770;
}
.modal-btn:checked + label .uil,
.modal-btn:not(:checked) + label .uil{
	margin-left: 10px;
	font-size: 18px;
}
.modal-btn:checked + label:after,
.modal-btn:not(:checked) + label:after{
  position: fixed;
  top: 30px;
  right: 30px;
  z-index: 110;
  width: 40px;
  border-radius: 3px;
  height: 30px;
  text-align: center;
  line-height: 30px;
  font-size: 18px;
  background-color: #ffeba7;
  color: #102770;
  font-family: 'unicons';
  content: '\eac6'; 
  box-shadow: 0 12px 25px 0 rgba(16,39,112,.25);
  transition: all 200ms linear;
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
}
.modal-btn:checked + label:hover:after,
.modal-btn:not(:checked) + label:hover:after{
  background-color: #102770;
  color: #ffeba7;
}
.modal-btn:checked + label:after{
  transition: opacity 300ms 300ms ease, transform 300ms 300ms ease, background-color 250ms linear, color 250ms linear;
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.modal{
  position: fixed;
  display: block;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  -ms-flex-pack: center;
  justify-content: center;
  margin: 0 auto;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 100;
  overflow-x: hidden;
  background-color: rgba(31,32,41,.75);
  pointer-events: none;
  opacity: 0;
  transition: opacity 250ms 700ms ease;
}
.modal-btn:checked ~ .modal{
  pointer-events: auto;
  opacity: 1;
  transition: all 300ms ease-in-out;
}
.modal-wrap {
  position: relative;
  display: block;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  margin-top: 20px;
  margin-bottom: 20px;
  border-radius: 4px;
  overflow: hidden;
  padding-bottom: 20px;
  background-color: #fff;
    -ms-flex-item-align: center;
    align-self: center;
    box-shadow: 0 12px 25px 0 rgba(199,175,189,.25);
  opacity: 0;
  transform: scale(0.6);
  transition: opacity 250ms 250ms ease, transform 300ms 250ms ease;
}
.modal-wrap img {
  display: block;
  width: 100%;
  height: auto;
}
.modal-wrap p {
  padding: 20px 30px 0 30px;
}
.modal-btn:checked ~ .modal .modal-wrap{
  opacity: 1;
  transform: scale(1);
  transition: opacity 250ms 500ms ease, transform 350ms 500ms ease;
}


.logo {
	position: absolute;
	top: 25px;
	left: 25px;
	display: block;
	z-index: 1000;
	transition: all 250ms linear;
}
.logo img {
	height: 26px;
	width: auto;
	display: block;
  	filter: brightness(10%);
	transition: filter 250ms 700ms linear;
}
.modal-btn:checked ~ .logo img {
  	filter: brightness(100%);
	transition: all 250ms linear;
}


@media screen and (max-width: 500px) {
	.modal-wrap {
		width: calc(100% - 40px);
		padding-bottom: 15px;
	}
	.modal-wrap p {
	  padding: 15px 20px 0 20px;
	}
}