<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
body{margin: 0;
padding: 0;
font-family: sans-serif;
background: url(3.jpg);
background-size: cover;
}
.box{position: absolute;
top: 50%;
left:50%;
transform: translate(-50%,-50%);
width: 400px;
padding: 40px;
background: rgba(0,0,0,.8);
box-sizing: border-box;
box-shadow: 0 15px 15px rgba(0,0,0,.5);
border-radius: 10px;
}
.box h2
{
margin: 0 0 30px;
padding: 0;
color: #fff;
text-align: center;
}
.box .inputbox
{
position: relative;
}
.box .inputbox input{
width:100%;
padding: 10px 0;
font-size: 16px;
color: red;
margin-bottom: 30px;
border: none;
border-bottom: 1px solid #fff;
outline: none;
background: transparent;
}
.box .inputbox label{
position: absolute;
top: 0;
left: 0;
padding: 10px 0;
font-size: 16px;
color: #fff;
pointer-events: none;
transition: .5s;
}
.box .inputbox input:focus ~ label,
.box .inputbox input:valid ~ label
{
top: -18px;
left: 0;
color: #00f;
font-size: 12px;
}
.box input[type="submit"]
{
background: transparent;
border: none;
outline: none;
color: #fff;
background:red;
padding: 10px 20px;
cursor: pointer;
border-radius: 10px;
}
</style>
</head>
<body>
<div class="box">
<h2>login</h2>
<farm>
<div class="inputbox">
<input type="text" name="" required="">
<label>username</label>
</div>
<div class="inputbox">
<input type="passwrod" name="" required="">
<label>password</label>
</div>
<input type="submit" name="">
</farm>
</div>
</body>
</html>
