JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>

  <head>
    <title>Login</title>
    <meta charset="UTF-8">
    <link rel="stylesheet" type="text/css" href="main.css">
    <link href="https://fonts.googleapis.com/css?family=Raleway:100" rel="stylesheet">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
    <link href="https://fonts.googleapis.com/css?family=Open+Sans:300" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css?family=Roboto+Condensed" rel="stylesheet">
  </head>

  <body>
      
<div class="LoginBox" style="">
<div class="element_wrapper">
 <a class="Login">Login</a>
    
    
    <input type="text" name="" class="username" placeholder="Username">
    <input type="password" name="" class="password" placeholder="Password">
    
    
    <class>
    <center><button class="btn" onclick="myFunction()">Login</button>
        <a href="https://www.beastfox.com"><input type="submit" value="Create" class="btn2"/></a>
        
        
        
        
</center>
        </class>
</div>
 </div>

  </body>

</html>

CSS

body,
html 
{
  background:
    linear-gradient(27deg, #151515 5px, transparent 5px) 0 5px,
    linear-gradient(207deg, #151515 5px, transparent 5px) 10px 0px,
    linear-gradient(27deg, #222 5px, transparent 5px) 0px 10px,
    linear-gradient(207deg, #222 5px, transparent 5px) 10px 5px,
    linear-gradient(90deg, #1b1b1b 10px, transparent 10px),
    linear-gradient(#1d1d1d 25%, #1a1a1a 25%, #1a1a1a 50%, transparent 50%, transparent 75%, #242424 75%, #242424);
  background-color: #131313;
  background-size: 20px 20px;

  overflow-x: hidden;
  overflow-y: hidden;
}

.username {
  display: block;
  margin: 0 auto;
  background: #333;
  color: #ccc;
  width: 150px;
  padding: 6px 15px 6px 5px;
  transition: 500ms all ease;
  border: 1px solid #333;
  margin-bottom: 10px;
  text-align: center;
  vertical-align: middle;
}

.username:hover {
  box-shadow: 0px 0px 4px #000;
}

.password {
  padding-top: 3;
  text-align: center;
  display: block;
  margin: 0 auto;
  background: #333;
  color: #ccc;
  width: 150px;
  padding: 6px 15px 6px 5px;
  transition: 500ms all ease;
  border: 1px solid #333;
}

.password:hover {
  box-shadow: 0px 0px 4px #000;
}

.LoginBox {
  top: 50%;
  left: 50%;
  position: fixed;
  transform: translate(-50%, -50%);
  padding-top: 50 auto;
  width: 300px;
  height: 300px;
  padding: 25px;
  background-color: firebrick;
  z-index: -3;
  box-shadow: 0px 0px 9px #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.Login {
  display: block;
  width: 100%;
  text-align: center;
  font-size: 30px;
  font-family: 'Roboto Condensed', sans-serif;
  color: #FFF;
  margin-bottom: 1em;
  border-bottom: 2px solid #ccc;
}

.btn {
    margin-top: 3em;
    top 70%;
    width: 70px;
    height: 30px;
    background-color: #333;
    border: none;
    color: #ccc;
    cursor: pointer;
    margin-right: 2em;
}
.btn:hover {
    box-shadow: 0px 0px 4px #000;
}
.btn:active {
    box-shadow: 0px 0px 5px #000;
}
.btn:focus {outline:none;}
.btn2...