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Animiertes CSS-Anmeldeformular mit flüssigem Hintergrund

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Liquid Animated Login</title>
    <style>
        @import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;500;700&display=swap');

* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Poppins', sans-serif;
        }

body {
            background: #0f0c29;
            background: linear-gradient(to right, #24243e, #302b63, #0f0c29);
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }

/* Animated Background Blobs */
        .background-blobs {
            position: absolute;
            width: 100%;
            height: 100%;
            z-index: -1;
            filter: blur(80px);
        }

.blob {
            position: absolute;
            background: #ff0080;
            border-radius: 50%;
            animation: move 20s infinite alternate;
        }

.blob:nth-child(1) {
            width: 400px;
            height: 400px;
            top: -100px;
            left: -100px;
            background: #ff0080;
            opacity: 0.6;
        }

.blob:nth-child(2) {
            width: 300px;
            height: 300px;
            bottom: -50px;
            right: -50px;
            background: #7928ca;
            opacity: 0.6;
            animation-delay: -5s;
        }

.blob:nth-child(3) {
            width: 250px;
            height: 250px;
            top: 50%;
            left: 50%;
            background: #00dfd8;
            opacity: 0.4;
            animation-delay: -10s;
        }

@keyframes move {
            from { transform: translate(0, 0) rotate(0deg) scale(1); }
            to { transform: translate(100px, 100px) rotate(360deg) scale(1.2); }
        }

/* Login Card */
        .login-container {
            position: relative;
            width: 400px;
            max-width: 90%;
            padding: 40px;
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(15px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
            animation: fadeIn 1s ease-out;
        }

@keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

.login-container h2 {
            color: #fff;
            text-align: center;
            margin-bottom: 30px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
        }

.input-group {
            position: relative;
            margin-bottom: 30px;
        }

.input-group input {
            width: 100%;
            padding: 10px 0;
            font-size: 16px;
            color: #fff;
            background: transparent;
            border: none;
            border-bottom: 2px solid rgba(255, 255, 255, 0.3);
            outline: none;
            transition: 0.3s;
        }

.input-group label {
            position: absolute;
            top: 10px;
            left: 0;
            color: rgba(255, 255, 255, 0.5);
            pointer-events: none;
            transition: 0.3s;
        }

.input-group input:focus ~ label,
        .input-group input:valid ~ label {
            top: -20px;
            font-size: 12px;
            color: #00dfd8;
        }

.input-group input:focus {
            border-bottom: 2px solid #00dfd8;
        }

.login-btn {
            width: 100%;
            padding: 12px;
            background: linear-gradient(45deg, #ff0080, #7928ca);
            border: none;
            border-radius: 50px;
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: 0.3s;
            box-shadow: 0 10px 20px rgba(255, 0, 128, 0.3);
        }

.login-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 15px 25px rgba(255, 0, 128, 0.5);
        }

.login-btn:active {
            transform: scale(0.98);
        }

.options {
            display: flex;
            justify-content: space-between;
            margin-top: 20px;
        }

.options a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            font-size: 13px;
            transition: 0.3s;
        }

.options a:hover {
            color: #fff;
        }

/* Unusual Shape Animation */
        .login-container::before {
            content: '';
            position: absolute;
            top: -5px;
            left: -5px;
            right: -5px;
            bottom: -5px;
            z-index: -1;
            background: linear-gradient(45deg, #ff0080, #00dfd8);
            border-radius: 25px;
            opacity: 0;
            transition: 0.5s;
        }

.login-container:hover::before {
            opacity: 0.3;
            filter: blur(10px);
        }
    </style>
</head>
<body>

<div class="login-container">
        <h2>Login</h2>
        <form action="#">
            <div class="input-group">
                <input type="text" required>
                <label>Username</label>
            </div>
            <div class="input-group">
                <input type="password" required>
                <label>Password</label>
            </div>
            <button type="submit" class="login-btn">Sign In</button>
            <div class="options">
                <a href="#">Forgot Password?</a>
                <a href="#">Create Account</a>
            </div>
        </form>
    </div>

document.addEventListener('mouseenter', () => {
            card.style.transition = 'none';
        });

document.addEventListener('mouseleave', () => {
            card.style.transition = 'all 0.5s ease';
            card.style.transform = `rotateY(0deg) rotateX(0deg)`;
        });
    </script>
</body>
</html>

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