/**
 * Vertical Product Gallery – vg-gallery.css
 */

/* ── Variables + desktop layout ─────────────────────────────────────── */
.vg-gallery {
    --vg-thumb-size:   80px;
    --vg-thumb-gap:    8px;
    --vg-thumb-radius: 6px;
    --vg-main-radius:  10px;
    --vg-accent:       var(--ast-global-color-0, #006aff);
    --vg-border:       #e2e2e2;
    /* --vg-bg:           #f8f8f8; */
    --vg-transition:   0.35s cubic-bezier(0.4, 0, 0.2, 1);

    display: flex;
    flex-direction: row;
    gap: 14px;
    align-items: flex-start;
    width: 100%;
    margin: 0;
    padding: 0;
    list-style: none;
    isolation: isolate;
}

/* ── Thumbnail rail ──────────────────────────────────────────────────── */
.vg-thumbnails {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
    width: calc(var(--vg-thumb-size) + 2px);
}

.vg-thumbnails__track {
    display: flex;
    flex-direction: column;
    gap: var(--vg-thumb-gap);
    overflow: hidden;
}

.vg-thumb {
    display: block;
    width: var(--vg-thumb-size);
    height: var(--vg-thumb-size);
    flex-shrink: 0;
    padding: 0;
    border: 2px solid var(--vg-border);
    border-radius: var(--vg-thumb-radius);
    background: var(--vg-bg);
    cursor: pointer;
    overflow: hidden;
    transition: border-color var(--vg-transition), transform 0.2s ease, box-shadow 0.2s ease;
    -webkit-tap-highlight-color: transparent;
}

.vg-thumb:focus-visible {
    outline: 3px solid var(--vg-accent);
    outline-offset: 2px;
}

.vg-thumb:hover {
    border-color: color-mix(in srgb, var(--vg-accent) 50%, var(--vg-border));
    transform: scale(1.04);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.vg-thumb.is-active {
    border-color: var(--vg-accent);
    box-shadow: 0 0 0 1px var(--vg-accent);
    pointer-events: none;
}

.vg-thumb img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    -webkit-user-drag: none;
    user-select: none;
}

/* ── Rail arrows ─────────────────────────────────────────────────────── */
.vg-rail-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    border: 1px solid var(--vg-border);
    border-radius: 50%;
    background: #fff;
    color: #555;
    cursor: pointer;
    transition: background var(--vg-transition), color var(--vg-transition);
    flex-shrink: 0;
}

.vg-rail-arrow[hidden] {
    display: none;
}

.vg-rail-arrow:hover {
    background: var(--vg-accent);
    color: #fff;
    border-color: var(--vg-accent);
}

.vg-rail-arrow:focus-visible {
    outline: 3px solid var(--vg-accent);
    outline-offset: 2px;
}

.vg-rail-arrow svg {
    width: 10px;
    height: 6px;
    pointer-events: none;
}

/* ── Main image panel ────────────────────────────────────────────────── */
.vg-main {
    position: relative;
    flex: 1;
    min-width: 0;
    border-radius: var(--vg-main-radius);
    background: var(--vg-bg);
    overflow: hidden;
    aspect-ratio: 3 / 4;
    touch-action: none;   /* claim both axes — JS handles all swipe directions */
}

.vg-main__img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    border-radius: var(--vg-main-radius);
    opacity: 0;
    transform: translateY(6px);
    transition: opacity var(--vg-transition), transform var(--vg-transition);
    pointer-events: none;
    -webkit-user-drag: none;
    user-select: none;
}

.vg-main__img.is-active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    z-index: 1;
}

.vg-main__img.is-leaving {
    opacity: 0;
    transform: translateY(-6px);
    z-index: 0;
}

/* ── Mobile: column layout, main on top, thumb strip below ──────────── */
@media (max-width: 600px) {
    .vg-gallery {
        flex-direction: column;
        width: 100%;
    }

    /* Width is known (100%), so aspect-ratio can calculate height */
    .vg-main {
        width: 100%;
        flex: none;
        aspect-ratio: 3 / 4;
    }

    /* Horizontal scrollable thumb strip */
    .vg-thumbnails {
        flex-direction: row;
        width: 100%;
        height: auto;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: 2px;
    }

    .vg-thumbnails::-webkit-scrollbar {
        display: none;
    }

    .vg-thumbnails__track {
        flex-direction: row;
        flex-wrap: nowrap;
        overflow: visible;
        gap: var(--vg-thumb-gap);
    }

    .vg-thumb {
        flex-shrink: 0;
    }

    .vg-rail-arrow--prev svg {
        transform: rotate(-90deg);
    }

    .vg-rail-arrow--next svg {
        transform: rotate(-90deg);
    }
}

/* ── Accessibility ───────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .vg-main__img,
    .vg-thumb {
        transition: none;
    }
}