/*
 * Motion 层 —— 通用过渡 utility 与 reduced-motion 兜底。
 */

.transition-base
{
    transition:
        background-color var(--dur-base) var(--ease-out),
        border-color var(--dur-base) var(--ease-out),
        color var(--dur-base) var(--ease-out),
        box-shadow var(--dur-base) var(--ease-out);
}

.transition-fast
{
    transition:
        background-color var(--dur-fast) var(--ease-out),
        border-color var(--dur-fast) var(--ease-out),
        color var(--dur-fast) var(--ease-out),
        box-shadow var(--dur-fast) var(--ease-out),
        transform var(--dur-fast) var(--ease-out);
}

@media (prefers-reduced-motion: reduce)
{
    *,
    *::before,
    *::after
    {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}