/* Default (Day Mode) */
body {
    background-color: white;
    color: black;
    transition: background-color 1s ease, color 1s ease;
    will-change: background-color, color;
}

a:link {
    color: blue;
    transition: color 1s ease;
    will-change: color;
}

a:visited {
    color: purple;
    transition: color 1s ease;
    will-change: color;
}

/* Night Mode */
body.night-mode {
    background-color: black;
    color: white;
    transition: background-color 1s ease, color 1s ease;
    will-change: background-color, color;
}

body.night-mode a:link {
    color: lightblue;
    transition: color 1s ease;
    will-change: color;
}

body.night-mode a:visited {
    color: lightcoral;
    transition: color 1s ease;
    will-change: color;
}

#mode-switch {
    position: fixed;
    top: 10px;
    right: 10px;
    padding: 10px;
    cursor: pointer;
}