/* =====================================================
   Interactive Image Sheen — bkbg-iis-*
   ===================================================== */

.bkbg-iis-app {
    box-sizing: border-box;
}

.bkbg-iis-scene {
    display: flex;
}

/* ── Card wrapper ── */
.bkbg-iis-card {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transform-style: preserve-3d;
    transition: transform .12s ease-out, box-shadow .12s ease-out;
    will-change: transform;
}

/* ── Image ── */
.bkbg-iis-img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
    -webkit-user-drag: none;
}

/* ── Sheen overlay ── */
.bkbg-iis-sheen {
    position: absolute;
    pointer-events: none;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    mix-blend-mode: screen;
    transition: opacity .2s;
    opacity: 0;
}

.bkbg-iis-card:hover .bkbg-iis-sheen,
.bkbg-iis-card.bkbg-iis-active .bkbg-iis-sheen {
    opacity: 1;
}

/* ── Caption ── */
.bkbg-iis-caption {
    text-align: center;
    margin-top: 10px;
    font-family: var(--bkbg-iis-cp-font-family, inherit);
    font-size: var(--bkbg-iis-cp-font-size-d, 14px);
    font-weight: var(--bkbg-iis-cp-font-weight, 400);
    font-style: var(--bkbg-iis-cp-font-style, normal);
    text-decoration: var(--bkbg-iis-cp-text-decoration, none);
    text-transform: var(--bkbg-iis-cp-text-transform, none);
    line-height: var(--bkbg-iis-cp-line-height-d, 1.4);
    letter-spacing: var(--bkbg-iis-cp-letter-spacing-d, normal);
    word-spacing: var(--bkbg-iis-cp-word-spacing-d, normal);
}

/* ── Placeholder ── */
.bkbg-iis-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #e2e8f0;
    color: #94a3b8;
    font-size: 14px;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
    .bkbg-iis-caption {
        font-size: var(--bkbg-iis-cp-font-size-t, var(--bkbg-iis-cp-font-size-d, 14px));
        line-height: var(--bkbg-iis-cp-line-height-t, var(--bkbg-iis-cp-line-height-d, 1.4));
        letter-spacing: var(--bkbg-iis-cp-letter-spacing-t, var(--bkbg-iis-cp-letter-spacing-d, normal));
        word-spacing: var(--bkbg-iis-cp-word-spacing-t, var(--bkbg-iis-cp-word-spacing-d, normal));
    }
}
@media (max-width: 767px) {
    .bkbg-iis-caption {
        font-size: var(--bkbg-iis-cp-font-size-m, var(--bkbg-iis-cp-font-size-d, 14px));
        line-height: var(--bkbg-iis-cp-line-height-m, var(--bkbg-iis-cp-line-height-d, 1.4));
        letter-spacing: var(--bkbg-iis-cp-letter-spacing-m, var(--bkbg-iis-cp-letter-spacing-d, normal));
        word-spacing: var(--bkbg-iis-cp-word-spacing-m, var(--bkbg-iis-cp-word-spacing-d, normal));
    }
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
    .bkbg-iis-card {
        transition: none !important;
    }
    .bkbg-iis-sheen {
        display: none;
    }
}