/* =============================================================
   theme-transition.css — Animierter Theme-Wechsel
   Nutzt die View Transition API (Chrome 111+, Edge 111+).
   Fallback: body transition in base.css greift für ältere Browser.
   ============================================================= */

/*
   View Transition: sanftes Cross-Fade beim Theme-Wechsel.
   Wird von theme.js via document.startViewTransition() ausgelöst.
*/
::view-transition-old(root),
::view-transition-new(root) {
    animation-duration: 0.35s;
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    animation-fill-mode: both;
}

::view-transition-old(root) {
    animation-name: theme-fade-out;
}

::view-transition-new(root) {
    animation-name: theme-fade-in;
}

@keyframes theme-fade-out {
    from { opacity: 1; filter: blur(0px); }
    to   { opacity: 0; filter: blur(2px); }
}

@keyframes theme-fade-in {
    from { opacity: 0; filter: blur(2px); }
    to   { opacity: 1; filter: blur(0px); }
}

/* Reduced Motion: Transition deaktivieren */
@media (prefers-reduced-motion: reduce) {
    ::view-transition-old(root),
    ::view-transition-new(root) {
        animation: none;
    }
}