Animated Login and Signup Form using HTML, CSS & JavaScript

This Animated Login and Signup Form provides a smooth, modern, and interactive experience for user authentication. Designed with HTML, CSS, and JavaScript, the form uses panel sliding and fade-in transitions to switch between Login and Signup modes without reloading the page.

Whether you're building a user portal, app dashboard, or registration landing page, this form layout ensures a responsive, accessible, and elegant UI/UX experience.

🧰 Technologies Used:

• HTML5 – Form structure and labels

• CSS3 – Styling, layout, transitions, and responsive design

• JavaScript – Handles toggle logic, event listeners, and class switching

🎬 How It Works (Plain Text):

The layout includes two main forms: one for login and another for signup, wrapped inside a container. Initially, the login form is visible. When the user clicks “Sign Up,” JavaScript dynamically toggles a class that shifts the container and reveals the signup form with a sliding or fading animation. The background or panel may also animate to reflect the mode change. Similarly, clicking “Log In” reverses the transition. CSS handles smooth visual effects, while JavaScript manages the UI state.

✨ Features:

• Toggle between login and signup without reloading

• Clean and modern design

• Sliding or fading transitions for smooth UX

• Responsive layout for all screen sizes

• Easily customizable structure and colors

🧠 Learning Highlights:

• DOM manipulation and class toggling with JavaScript

• Using Flexbox/Grid for responsive form layouts

• Animating transitions with CSS keyframes or transforms

• Designing intuitive and clean authentication interfaces

🛠 Customization Ideas:

• Add show/hide password toggle

• Integrate real backend or validation logic

• Include remember me or social login options

• Add animation delay or sound for playful feedback