Webleb - UI Elements - loign bien chido

HTML

<!DOCTYPE html>
<html lang="es">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Login Moderno</title>
    <link rel="stylesheet" href="../Ideas_diceño/ida1.css">
</head>
<body>
    <div class="container">
        
        <form class="form" id="loginForm">
            <h2>Iniciar Sesión</h2>
            <div class="inputBox">
                <input type="text" required>
                <span>Usuario</span>
                <i></i>
            </div>
            <div class="inputBox">
                <input type="password" required>
                <span>Contraseña</span>
                <i></i>
            </div>
            <div class="links">
                <a href="#">¿Olvidaste tu contraseña?</a>
                <a href="#" id="showRegister">Registrarse</a>
            </div>
            <input type="submit" value="Entrar">
        </form>

<form class="register" id="registerForm">
            <h2>Crear Cuenta</h2>
            <div class="inputBox">
                <input type="text" required>
                <span>Nombre Completo</span>
                <i></i>
            </div>
            <div class="inputBox">
                <input type="email" required>
                <span>Correo Electrónico</span>
                <i></i>
            </div>
            <div class="inputBox">
                <input type="password" required>
                <span>Contraseña</span>
                <i></i>
            </div>
            <div class="inputBox">
                <input type="password" required>
                <span>Confirmar Contraseña</span>
                <i></i>
            </div>
            <input type="submit" value="Registrarse">
            <div class="toggle-form">
                <a href="#" id="showLogin">¿Ya tienes cuenta? Inicia sesión</a>
            </div>
        </form>
    </div>

</body>
</html>

CSS

* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

body {
            background: #0a192f;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            color: #fff;
        }

.container {
            position: relative;
            width: 380px;
            height: 420px;
            background: #112240;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
        }

.container::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 380px;
            height: 420px;
            background: linear-gradient(0deg, transparent, #45ffca, #45ffca);
            transform-origin: bottom right;
            animation: animate 6s linear infinite;
        }

.container::after {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 380px;
            height: 420px;
            background: linear-gradient(0deg, transparent, #45ffca, #45ffca);
            transform-origin: bottom right;
            animation: animate 6s linear infinite;
            animation-delay: -3s;
        }

@keyframes animate {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }

.form {
            position: absolute;
            inset: 2px;
            border-radius: 8px;
            background: #112240;
            z-index: 10;
            padding: 40px;
            display: flex;
            flex-direction: column;
        }

.form h2 {
            color: #45ffca;
            font-weight: 500;
            text-align: center;
            letter-spacing: 0.1em;
            margin-bottom: 30px;
        }

.inputBox {
            position: relative;
            width: 100%;
            margin-top: 20px;
        }

.inputBox input {
            position: relative;
            width: 100%;
            padding: 20px 10px 10px;
            background: transparent;
            border: none;
            outline: none;
            color: #0a192f;
            font-size: 1em;
            letter-spacing: 0.05em;
            z-index: 10;
        }

.inputBox span {
            position: absolute;
            left: 0;
            padding: 20px 10px 10px;
            font-size: 1em;
            color: #8f8f8f;
            pointer-events: none;
            letter-spacing: 0.05em;
            transition: 0.5s;
        }

.inputBox input:valid ~ span,
        .inputBox input:focus ~ span {
            color: #45ffca;
            transform: translateY(-34px);
            font-size: 0.75em;
        }

.inputBox i {
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: #45ffca;
            border-radius: 4px;
            transition: 0.5s;
            pointer-events: none;
            z-index: 9;
        }

.inputBox input:valid ~ i,
        .inputBox input:focus ~ i {
            height: 44px;
        }

.links {
            display: flex;
            justify-content: space-between;
            margin: 15px 0;
        }

.links a {
            color: #8f8f8f;
            text-decoration: none;
            font-size: 0.75em;
        }

.links a:hover {
            color: #45ffca;
        }

input[type="submit"] {
            border: none;
            outline: none;
            background: #45ffca;
            padding: 11px 25px;
            width: 100%;
            margin-top: 20px;
            border-radius: 4px;
            font-weight: 600;
            cursor: pointer;
            color: #0a192f;
            transition: all 0.3s;
        }

input[type="submit"]:hover {
            background: #3ce6b7;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
        }

/* Estilos para el registro */
        .register {
            display: none;
            position: absolute;
            inset: 2px;
            border-radius: 8px;
            background: #112240;
            z-index: 10;
            padding: 40px;
            flex-direction: column;
        }

.register h2 {
            color: #45ffca;
            font-weight: 500;
            text-align: center;
            letter-spacing: 0.1em;
            margin-bottom: 30px;
        }

.toggle-form {
            text-align: center;
            margin-top: 20px;
        }

.toggle-form a {
            color: #45ffca;
            text-decoration: none;
            font-size: 0.9em;
            cursor: pointer;
        }

.toggle-form a:hover {
            text-decoration: underline;
        }

JS