style.css

*{
	margin: 0;
	padding: 0;
}

body{
	font-family: sans-serif;
	background: linear-gradient(#fff, #78abff);
	min-height: 100vh;
	padding: 150px 0;
	box-sizing: border-box;
}

.newsletter{
	background: #0c5adb;
	margin: 0 auto;
	text-align: center;
	max-width: 330px;
	padding: 50px 30px;
	border-radius: 5px;
	color: #fff;
}

.newsletter hr{
	width: 70px;
	height: 3px;
	margin: 30px auto;
	border: 0;
	background: rgba(255,255,255,0.5);
}

.newsletter p{
	font-size: 16px;
	line-height: 24px;
	color: rgba(255,255,255,0.8);
	margin-bottom: 30px; 
}

.newsletter input{
	border-radius: 3px;
	background-color: rgba(0,0,0,0.4);
	width: 100%;
	height: 55px;
	border: 0px;
	padding: 0 20px;
	color: rgba(255,255,255,0.8);
	margin-bottom: 36px;
	outline: none;
	box-sizing: border-box;
	font-size: 16px;
}

::placeholder{
	color: rgba(255,255,255,0.8);
}

.newsletter button{
	border: 1px solid rgba(255,255,255,0.5);
	border-radius: 3px;
	height: 50px;
	background-color: transparent;
	color: #fff;
	padding: 0px 28px;
	cursor: pointer;
	transition: 0.5s;
	font-size: 16px;
}

.newsletter button:hover{
	background-color: #00138e;
	border-color: #00138e;
}