Creating a Dark Mode Theme Toggle in CSS

Implement a dark mode toggle using CSS variables and JavaScript to switch themes.

Source Code

:root {
    --background-color: #ffffff;
    --text-color: #000000;
}
body[data-theme="dark"] {
    --background-color: #363537;
    --text-color: #FAFAFA;
}
body {
    background-color: var(--background-color);
    color: var(--text-color);
}