<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
html{
height: 100%;
}
body{
margin: 0;
padding: 0;
font-family: sans-serif;
background: linear-gradient(#141e30,#243b55);
}
.login-box{
position: absolute;
top: 50%;
left: 50%;
width: 400px;
padding: 40px;
transform: translate(-50%,-50%);
background: rgba(0, 0, 0, 0.5);
box-sizing: border-box;
box-shadow: 0 15px 25px rgba(0,0, 0, 0.6);
border-radius: 10px;
}
.login-box h2{
margin: 0 0 30px;
padding: 0;
color: #fff;
text-align: center;
}
.login-box .user-box{
position: relative;
}
.login-box .user-box input{
width: 100%;
padding: 10px 0;
font-size: 16px;
color: #fff;
margin-bottom: 30px;
border: none;
border-bottom: 1px solid #fff;
outline: none;
background:transparent;
}
.login-box .user-box label{
position: absolute;
top: 0;
left: 0;
padding: 10px 0;
font-size: 16px;
color: #fff;
pointer-events: none;
transition: .5s;
}
.login-box .user-box input:focus ~ label,
.login-box .user-box input:valid ~ label {
top: -20px;
left: 0;
color: #03e9f4;
font-size: 12px;
}
.login-box form a{
position: relative;
display: inline-block;
padding: 10px 20px;
color:#03e9f4;
font-size: 16px;
text-decoration: none;
text-transform: uppercase;
overflow: hidden;
transition: .5s;
margin-top: 40px;
letter-spacing: 4px;
}
.login-box a:hover{
background-color: #03e9f4;
color: #fff;
border-radius: 5px;
box-shadow: 0 0 5px #03e9f4,
0 0 25px #03e9f4,
0 0 50px #03e9f4,
0 0 100px #03e9f4
}
.login-box a span{
position: absolute;
display: block;
}
.login-box a span:nth-child(1){
top: 0;
left: -100%;
width: 100%;
height: 2px;
background: linear-gradient(90deg, transparent,#03e9f4);
animation: btn-anim1 1s linear infinite;
}
@keyframes btn-anim1{
0%{left:-100%}
50%,100%{left:100%;}
}
.login-box a span:nth-child(2){
top: -100%;
right: 0;
width: 2px;
height: 100%;
background: linear-gradient(180deg,transparent,#03e9f4);
animation: btn-anim2 1s linear infinite;
animation-delay: .2s;
}
@keyframes btn-anim2 {
0% {top:-100%;}
50%,100%{top:100%;}
}
.login-box a span:nth-child(3){
bottom: 0;
right: -100%;
width: 100%;
height: 2px;
background:linear-gradient(270deg,transparent,#03e9f4);
animation: btn-anim3 1s linear infinite;
animation-delay: .5s;
}
@keyframes btn-anim3 {
0% {right:-100%;}
50%,100%{right:100%;}
}
.login-box a span:nth-child(4){
bottom: -100%;
left: 0;
width: 2px;
height: 100%;
background: linear-gradient(360deg,transparent,#03e9f4);
animation: btn-anim4 1s linear infinite;
animation-delay: .8s;
}
@keyframes btn-anim4 {
0% {bottom:-100%;}
50%,100%{bottom:100%;}
}
</style>
</head>
<body>
<div class="login-box">
<h2>LOGIN</h2>
<form action="">
<div class="user-box">
<input type="text" required>
<label for="">Username</label>
</div>
<div class="user-box">
<input type="password" required>
<label for="">Password</label>
</div>
<a href="#">
<span></span>
<span></span>
<span></span>
<span></span>
Submit
</a>
</form>
</div>
</body>
</html>
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