Как исправить прыгание элемента ` input class="email_line" ` при наведении?

Question

[BranchInCode]

<section class="fifth-part">
	<div class="header-and-text-fifth">
		<form class="contact-form" name="contact-form" action="/contactus" method="post">   
			<div class="email-form">
				<input class="email_line" name="email" type="text" placeholder="Email Address...">
				<input class="email_button" name="subscribe" type="submit" value="SUBSCRIBE">
			</div>
		</form>
	</div>
</section>

.fifth-part{
	margin: 0 auto;
	text-align: center;
	background: url(../img/backpicture.jpg) no-repeat;
  background-color: gray;
	padding-top: 120px;
	padding-bottom: 120px;
	background-size: cover;
	color: white;
}
.contact-form{
	display: flex;
	justify-content: center;
}
.email-form{
	display: flex;
	justify-content: flex-start;
	width: 756px;
}
.email_line{
	margin-right: 21px;
	border-radius: 7px;
	padding-left: 29px;
	width: 520px;
	border: none;
	outline: none;
	font-size: 15px;	
}
.email_button{
	border-radius: 7px;
	padding: 32px 58px;
	color: white;
	background-color: #ff2d2d;
	font-weight: bold;
	font-size: 17px;
	border: none;
	outline: none;	
}
.email_button:hover{
	color: white;
	background: none;
	border: 2px solid #ff2d2d;
}

Answer 1

[Константин Давыдов]

.email_button {
    ...
    border: 2px solid transparent;
}
.email_button:hover {
    ...
    border-color: #ff2d2d;
}