.newsletter-box{
display:flex;
max-width:700px;
border:1px solid #444;
background:#000;
}

.newsletter-box input{
flex:1;
padding:15px;
border:none;
background:#000;
color:#fff;
}

.newsletter-box button{
background:#ddd;
border:none;
padding:15px 30px;
font-weight:bold;
cursor:pointer;
}

#newsletter_msg{
color:#fff;
padding:10px;
}