/* Modo oscuro qletras: invierte colores de toda la página */
html.dark-mode {
    background: #fff;
    filter: invert(1) hue-rotate(180deg);
}
html.dark-mode img,
html.dark-mode picture,
html.dark-mode video,
html.dark-mode iframe,
html.dark-mode svg,
html.dark-mode canvas {
    filter: invert(1) hue-rotate(180deg);
}
#theme-toggle-btn { cursor: pointer; }