<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Theme Switcher</title>
<style>
/* Basic Reset */
* {
margin: 0;
padding: 0;
box-sizing: border-box;
transition: background 0.3s, color 0.3s;
}
/* Body Styling */
body {
font-family: Arial, sans-serif;
height: 100vh;
display: flex;
justify-content: center;
align-items: center;
}
/* Themes */
body.light {
background: #f5f5f5;
color: #333;
}
body.dark {
background: #1e1e1e;
color: #fff;
}
/* Container */
.container {
text-align: center;
padding: 40px;
border-radius: 12px;
box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
background: #fff;
transition: transform 0.3s;
}
body.dark .container {
background: #2c2c2c;
}
.container:hover {
transform: scale(1.05);
}
/* Heading */
h1 {
margin-bottom: 20px;
font-size: 28px;
}
/* Theme Switcher */
.theme-switcher {
display: flex;
justify-content: center;
gap: 20px;
}
.theme-switcher label {
font-size: 18px;
cursor: pointer;
}
input[type="radio"] {
margin-right: 8px;
cursor: pointer;
}
</style>
</head>
<body>
<div class="container">
<h1>Choose Your Theme</h1>
<div class="theme-switcher">
<label>
<input type="radio" name="theme" value="light"> Light
</label>
<label>
<input type="radio" name="theme" value="dark"> Dark
</label>
<label>
<input type="radio" name="theme" value="system" checked> System
</label>
</div>
</div>
<script>
const applyTheme = (theme) => {
document.body.className = theme === "system"
? (window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light")
: theme;
localStorage.setItem("theme", theme);
};
document.querySelectorAll('input[name="theme"]').forEach(radio =>
radio.addEventListener("change", () => applyTheme(radio.value))
);
applyTheme(localStorage.getItem("theme") || "system");
</script>
</body>
</html>