Formulario de inicio de sesión/registro versión 2

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Formulario de inicio de sesión/registro versión 2

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HTML

<!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>Webleb</title>
      <link rel="stylesheet" href="/css/styles.css">
  </head>
  <body style="display:flex; align-items:center; justify-content:center;">
  <div class="login-page">
    <div class="form">
      <form class="register-form" method="POST">
        <h2>Register</h2>
        <input type="text" placeholder="Full Name *" required/>
        <input type="text" placeholder="Username *" required/>
        <input type="email" placeholder="Email *" required/>
        <input type="password" placeholder="Password *" required/>
        <a class="btn" href="#">
          <span></span>
          <span></span>
          <span></span>
          <span></span>
          Create
        </a>
        <p class="message">Already registered? <a href="#">Sign In</a></p>
      </form>
      <form class="login-form" method="post">
        <h2></i> Login</h2>
        <input type="text" placeholder="Username" required />
        <input type="password" placeholder="Password" required/>
        <a class="btn" href="#">
          <span></span>
          <span></span>
          <span></span>
          <span></span>
          Sign in
        </a>
        <p class="message">Not registered? <a href="#">Create an account</a></p>
      </form>
    </div>
  </div>
  <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
  <script src="/js/main.js"></script>
  </body>
  </html>

CSS

@import url(https://fonts.googleapis.com/css?family=Poppins:300);
html {
 height: 100%;
}
body{
 margin:0;
 padding:0;
 font-family: sans-serif;
 background: linear-gradient(#30142b, #2772a1);
}
.login-page {
  width: 400px;
  padding: 8% 0 0;
  margin: auto;
}
.form {
  position: relative;
  z-index: 1;
  text-align: center;
  position: absolute;
  top: 50%;
  left: 50%;
  width: 400px;
  padding: 40px;
  transform: translate(-50%, -50%);
  background: rgba(0,0,0,.5);
  box-sizing: border-box;
  box-shadow: 0 15px 25px rgba(0,0,0,.6);
  border-radius: 10px;
}
.form input {
 width: 100%;
 padding: 10px 0;
 font-size: 13px;
 color: #fff;
 margin-bottom: 30px;
 border: none;
 border-bottom: 1px solid #fff;
 outline: none;
 background: transparent;
  
}
h2{
 color:white;
}

.form .message {
  margin: 15px 0 0;
  color: #b3b3b3;
  font-size: 12px;
}
.form .message a {
  color: #289bb8;
  text-decoration: none;
}
.form .register-form {
  display: none;
}
.btn {
  position: relative;
  display: inline-block;
  padding: 10px 20px;
  color: #289bb8;
  font-size: 16px;
  text-decoration: none;
  overflow: hidden;
  transition: .5s;
  margin-top: 15px;
  letter-spacing: 2px
}
.btn:hover {
  background: #289bb8;
  color: #fff;
  border-radius: 5px;
  box-shadow: 0 0 5px #289bb8,
              0 0 25px #289bb8,
              0 0 50px #289bb8,
              0 0 100px #289bb8;
}

.btn span {
  position: absolute;
  display: block;
}

.btn span:nth-child(1) {
  top: 0;
  left: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, #289bb8);
  animation: btn-anim1 1s linear infinite;
}

@keyframes btn-anim1 {
  0% {
    left: -100%;
  }
  50%,100% {
    left: 100%;
  }
}

.btn span:nth-child(2) {
  top: -100%;
  right: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, transparent, #289bb8);
  animation: btn-anim2 1s linear infinite;
  animation-delay: .25s
}

@keyframes btn-anim2 {
  0% {
    top: -100%;
  }
  50%,100% {
    top: 100%;
  }
}

.btn span:nth-child(3) {
  bottom: 0;
  right: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(270deg, transparent, #289bb8);
  animation: btn-anim3 1s linear infinite;
  animation-delay: .5s
}

@keyframes btn-anim3 {
  0% {
    right: -100%;
  }
  50%,100% {
    right: 100%;
  }
}

.btn span:nth-child(4) {
  bottom: -100%;
  left: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(360deg, transparent, #289bb8);
  animation: btn-anim4 1s linear infinite;
  animation-delay: .75s
}

@keyframes btn-anim4 {
  0% {
    bottom: -100%;
  }
  50%,100% {
    bottom: 100%;
  }
}