Introduction
This code creates a modern Gradient Card Login Form designed for a sleek, dark-themed interface. It features a gradient-colored card, soft shadows, and interactive input fields, providing a visually appealing login experience. The form is fully responsive and works on desktop and mobile devices.
Features
- Gradient Card Design
- The login card uses a linear gradient background (
#ff6b6bto#4ecdc4) for a vibrant look. - Rounded corners and shadows enhance the 3D effect.
- The login card uses a linear gradient background (
- Interactive Input Fields
- Inputs have soft backgrounds and subtle shadows.
- On focus, the border color changes, background becomes slightly lighter, and a glow effect is applied.
- Placeholders are semi-transparent for readability.
- Login Button Effects
- Button uses a light gradient for contrast with the card background.
- Hover and active effects include shadow intensification and slight movement (translateY).
- Error Handling
- An error message appears below the button if login credentials are incorrect.
- The error box is styled with semi-transparent red, rounded corners, and subtle shadows.
- Forgot Password Link
- Styled link appears below the form.
- On hover, the color changes to match the gradient for emphasis.
- Responsive Design
- Card width and padding adjust for screens smaller than 480px.
- Maintains usability on mobile devices.
- JavaScript Validation
- Simple demo validation checks if
username === "admin"andpassword === "password123". - Shows a success alert for correct credentials or displays the error message for incorrect inputs.
- Supports pressing Enter to submit while focusing on any input field.
- Simple demo validation checks if
How It Works
- HTML Structure
- The
.login-carddiv contains the heading, form, and forgot password link. - Form has two input fields (username and password) and a submit button.
- An error message
<div>is hidden initially.
- The
- CSS Styling
- Gradient background and shadows create depth.
- Inputs and buttons have transitions for smooth focus/hover effects.
- Media queries ensure responsiveness.
- JavaScript Functionality
handleLogin()validates credentials.- Displays error message if login fails.
- Listens for Enter key to trigger the login.
Conclusion
The Gradient Card Login Form is a modern, professional login interface with a focus on visual appeal, responsiveness, and basic validation. Its gradient design and interactive elements make it suitable for modern web applications or dashboards.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Gradient Card Login Form</title>
<style>
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
margin: 0;
background: #121212;
padding: 20px;
box-sizing: border-box;
}
.login-card {
background: linear-gradient(135deg, #ff6b6b 0%, #4ecdc4 100%);
border-radius: 16px;
box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
padding: 40px;
width: 100%;
max-width: 400px;
position: relative;
overflow: hidden;
}
.login-card::before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: rgba(255, 255, 255, 0.1);
z-index: 0;
border-radius: 16px;
}
.login-card h2 {
text-align: center;
margin-bottom: 30px;
color: #fff;
font-size: 28px;
font-weight: 600;
text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
position: relative;
z-index: 1;
}
.form-group {
margin-bottom: 24px;
position: relative;
z-index: 1;
}
.form-group label {
display: block;
margin-bottom: 8px;
color: #fff;
font-weight: 500;
font-size: 14px;
text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}
.form-group input {
width: 100%;
padding: 14px 16px;
border: 1px solid rgba(255, 255, 255, 0.3);
border-radius: 12px;
font-size: 16px;
background: rgba(255, 255, 255, 0.15);
color: #fff;
transition: all 0.3s ease;
box-sizing: border-box;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
.form-group input:focus {
outline: none;
border-color: #fff;
background: rgba(255, 255, 255, 0.25);
box-shadow: 0 0 15px rgba(255, 255, 255, 0.3);
}
.form-group input::placeholder {
color: rgba(255, 255, 255, 0.6);
}
.login-button {
width: 100%;
padding: 14px;
background: linear-gradient(135deg, #fff 0%, #f0f0f0 100%);
color: #ff6b6b;
border: none;
border-radius: 12px;
font-size: 16px;
font-weight: 600;
cursor: pointer;
transition: all 0.3s ease;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
margin-top: 8px;
position: relative;
z-index: 1;
}
.login-button:hover {
transform: translateY(-2px);
box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
background: linear-gradient(135deg, #f0f0f0 0%, #fff 100%);
}
.login-button:active {
transform: translateY(0);
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
.error {
color: #ff4d4d;
font-size: 14px;
text-align: center;
margin-top: 16px;
display: none;
padding: 10px;
background: rgba(255, 77, 77, 0.2);
border-radius: 8px;
border: 1px solid rgba(255, 77, 77, 0.3);
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
position: relative;
z-index: 1;
}
.forgot-password {
text-align: center;
margin-top: 20px;
position: relative;
z-index: 1;
}
.forgot-password a {
color: #fff;
text-decoration: none;
font-size: 14px;
transition: color 0.3s ease;
text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}
.forgot-password a:hover {
color: #ff6b6b;
text-decoration: underline;
}
@media (max-width: 480px) {
.login-card {
padding: 30px 24px;
margin: 10px;
}
}
</style>
</head>
<body>
<div class="login-card">
<h2>Sign In</h2>
<form id="loginForm">
<div class="form-group">
<label for="username">Username</label>
<input type="text" id="username" placeholder="Enter your username" required>
</div>
<div class="form-group">
<label for="password">Password</label>
<input type="password" id="password" placeholder="Enter your password" required>
</div>
<button type="submit" class="login-button">Sign In</button>
<div class="error" id="error-message">Invalid username or password. Please try again.</div>
</form>
<div class="forgot-password">
<a href="#">Forgot your password?</a>
</div>
</div>
<script>
document.getElementById('loginForm').addEventListener('submit', function(e) {
e.preventDefault();
handleLogin();
});
function handleLogin() {
const username = document.getElementById('username').value.trim();
const password = document.getElementById('password').value;
const errorMessage = document.getElementById('error-message');
// Simple demo validation
if (username === "admin" && password === "password123") {
alert("Login successful! Welcome to the dashboard.");
errorMessage.style.display = 'none';
} else {
errorMessage.style.display = 'block';
document.getElementById('password').focus();
}
}
// Add enter key support
document.addEventListener('keypress', function(e) {
if (e.key === 'Enter') {
const activeElement = document.activeElement;
if (activeElement.tagName === 'INPUT') {
handleLogin();
}
}
});
</script>
</body>
</html>