/* Base styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    transition: background 0.3s, color 0.3s;
}

header {
    padding: 2rem;
    text-align: center;
}

main {
    padding: 2rem;
    text-align: center;
}

button#theme-toggle {
    padding: 0.5rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s, color 0.3s;
}

/* Light Theme */
body.light-theme {
    background: #f9f9fb;
    color: #222;
}

body.light-theme header {
    background: #eaeaea;
}

body.light-theme button#theme-toggle {
    background: #222;
    color: #fff;
}

/* Dark Theme */
body.dark-theme {
    background: #181a1b;
    color: #f1f1f1;
}

body.dark-theme header {
    background: #23272a;
}

body.dark-theme button#theme-toggle {
    background: #f1f1f1;
    color: #181a1b;
}