Código HTML y CSS del formulario de inicio de sesión de Neomorphism

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Código HTML y CSS del formulario de inicio de sesión de Neomorphism

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HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Animated Neomorphism Login</title>
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap" rel="stylesheet">
    <style>
        /* Base Colors & Variables for Neomorphism */
        :root {
            --bg-color: #e0e0e0;
            --light-shadow: #ffffff;
            --dark-shadow: #a3b1c6;
            --main-text-color: #333;
            --accent-color: #6a67ce; /* A pleasant purple */
            --accent-hover: #7b78e4;
            --accent-active: #5c59b9;
        }

/* Global Styles */
        body {
            margin: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            font-family: 'Poppins', sans-serif;
            background: linear-gradient(135deg, var(--bg-color) 0%, #cacaca 50%, var(--bg-color) 100%);
            background-size: 400% 400%; /* Larger size for animation */
            animation: backgroundAnimation 15s ease infinite alternate; /* Slow, smooth animation */
            color: var(--main-text-color);
            overflow: hidden; /* Prevent scrollbar if background moves slightly */
        }

/* Background Animation */
        @keyframes backgroundAnimation {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

/* Login Container */
        .login-container {
            background: var(--bg-color);
            padding: 40px;
            border-radius: 30px;
            box-shadow: 10px 10px 20px var(--dark-shadow),
                        -10px -10px 20px var(--light-shadow);
            text-align: center;
            width: 350px;
            max-width: 90%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            z-index: 1; /* Ensure it's above potential pseudo-elements */
        }

.login-container:hover {
            transform: translateY(-5px); /* Subtle lift on hover */
            box-shadow: 15px 15px 30px var(--dark-shadow),
                        -15px -15px 30px var(--light-shadow);
        }

.login-container h2 {
            font-size: 2.5em;
            margin-bottom: 30px;
            color: var(--main-text-color);
            text-shadow: 1px 1px 2px var(--light-shadow);
            font-weight: 700;
        }

/* Form Group (Label + Input) */
        .form-group {
            margin-bottom: 25px;
            text-align: left;
        }

.form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--main-text-color);
            font-size: 0.95em;
        }

/* Input Fields */
        .form-group input {
            width: calc(100% - 40px); /* Adjust for padding */
            padding: 15px 20px;
            border: none;
            outline: none;
            border-radius: 15px;
            background: var(--bg-color);
            font-size: 1em;
            color: var(--main-text-color);
            box-shadow: inset 5px 5px 10px var(--dark-shadow),
                        inset -5px -5px 10px var(--light-shadow);
            transition: box-shadow 0.3s ease, transform 0.2s ease;
            font-weight: 400;
        }

.form-group input::placeholder {
            color: rgba(51, 51, 51, 0.6);
        }

.form-group input:focus {
            box-shadow: inset 3px 3px 7px var(--dark-shadow),
                        inset -3px -3px 7px var(--light-shadow),
                        0 0 0 3px var(--accent-color); /* Subtle accent ring on focus */
            transform: scale(1.01); /* Slightly enlarge on focus */
        }

/* Login Button */
        .login-button {
            width: 100%;
            padding: 18px;
            border: none;
            outline: none;
            border-radius: 25px;
            background: var(--accent-color);
            color: white;
            font-size: 1.2em;
            font-weight: bold;
            cursor: pointer;
            box-shadow: 7px 7px 15px var(--dark-shadow),
                        -7px -7px 15px var(--light-shadow);
            transition: all 0.3s ease;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

.login-button:hover {
            background: var(--accent-hover);
            box-shadow: 10px 10px 20px var(--dark-shadow),
                        -10px -10px 20px var(--light-shadow);
            transform: translateY(-3px); /* Subtle lift */
        }

.login-button:active {
            background: var(--accent-active);
            box-shadow: inset 3px 3px 7px var(--dark-shadow),
                        inset -3px -3px 7px var(--light-shadow);
            transform: translateY(1px); /* Press down effect */
        }

/* Forgot Password / Sign Up links */
        .links {
            margin-top: 25px;
            font-size: 0.9em;
            font-weight: 400;
        }

.links a {
            color: var(--accent-color);
            text-decoration: none;
            margin: 0 10px;
            transition: color 0.3s ease, text-decoration 0.3s ease;
        }

.links a:hover {
            color: var(--accent-active);
            text-decoration: underline;
        }
    </style>
</head>
<body>
    <div class="login-container">
        <h2>Login</h2>
        <form>
            <div class="form-group">
                <label for="username">Username</label>
                <input type="text" id="username" name="username" placeholder="Enter your username" required>
            </div>
            <div class="form-group">
                <label for="password">Password</label>
                <input type="password" id="password" name="password" placeholder="Enter your password" required>
            </div>
            <button type="submit" class="login-button">Login</button>
        </form>
        <div class="links">
            <a href="#">Forgot Password?</a>
            <span>•</span>
            <a href="#">Sign Up</a>
        </div>
    </div>
</body>
</html>

CSS