/* ── Auto-refresh: brief glow on cells whose data just changed ─── */

@keyframes flashUpdate {
    0%   { box-shadow: 0 0 0 0 var(--accent, #c9a227); background-color: color-mix(in srgb, var(--accent, #c9a227) 14%, transparent); }
    60%  { box-shadow: 0 0 0 4px transparent; }
    100% { box-shadow: 0 0 0 0 transparent; background-color: transparent; }
}

.flash-update {
    animation: flashUpdate 1.2s ease-out;
}

@media (prefers-reduced-motion: reduce) {
    .flash-update { animation: none; outline: 1px solid var(--accent, #c9a227); }
}