/* ===== 2.5D nâng cao polygon ===== */
.xa-2_5d {
    transform-box: fill-box;
    transform-origin: center center;

    /* 🔥 nâng polygon lên */
    transform: translateY(calc(var(--lift, 0px) * -1));

    /* 🔥 bóng đổ phía dưới */
    filter:
        drop-shadow(
            0
            calc(var(--lift, 0px) * 1.2)
            calc(var(--lift, 0px) * 1.5)
            rgba(0,0,0,0.35)
        );

    transition:
        transform 0.25s ease,
        filter 0.25s ease,
        fill-opacity 0.2s;
}