/* =====================================================
   BIWA GALLERY
===================================================== */

.biwa-gallery {
    position: relative;
    display: block;

    width: 100%;
    height: 70vh;

    max-width: 100%;

    overflow: hidden;

    box-sizing: border-box;
}


.biwa-gallery *,
.biwa-gallery *::before,
.biwa-gallery *::after {
    box-sizing: border-box;
}


/* =====================================================
   VIEWPORT
===================================================== */

.biwa-gallery__viewport {
    position: relative;

    width: 100%;
    height: 100%;

    overflow: hidden;
}


/* =====================================================
   TRACK
===================================================== */

.biwa-gallery__track {
    position: relative;

    width: 100%;
    height: 100%;
}


/* =====================================================
   SLIDES
===================================================== */

.biwa-gallery__slide {
    position: absolute;

    inset: 0;

    width: 100%;
    height: 100%;

    opacity: 0;
    visibility: hidden;

    pointer-events: none;

    transition:
        opacity 0.6s ease,
        visibility 0s linear 0.6s;

    z-index: 1;
}


.biwa-gallery__slide.is-active {
    opacity: 1;

    visibility: visible;

    pointer-events: auto;

    transition:
        opacity 0.6s ease;

    z-index: 2;
}


/* =====================================================
   GRID
===================================================== */

.biwa-gallery__grid {
    display: flex;

    flex-direction: row;

    width: 100%;
    height: 100%;

    min-width: 0;
    min-height: 0;

    column-gap: 0;
}


/* =====================================================
   COLUMN
===================================================== */

.biwa-gallery__column {
    position: relative;

    display: grid;

    width: var(
        --biwa-column-width,
        100%
    );

    height: 100%;

    flex: 0 0 var(
        --biwa-column-width,
        100%
    );

    min-width: 0;
    min-height: 0;

    grid-template-rows:
        repeat(
            var(--biwa-rows, 1),
            minmax(0, 1fr)
        );

    row-gap: 0;
}


/* =====================================================
   CELL
===================================================== */

.biwa-gallery__cell {
    position: relative;

    display: block;

    width: 100%;
    height: 100%;

    min-width: 0;
    min-height: 0;

    overflow: hidden;

    margin: 0;
    padding: 0;

    text-decoration: none;

    cursor: pointer;
}


/* =====================================================
   IMAGE
===================================================== */

.biwa-gallery__cell img {
    position: absolute;

    inset: 0;

    display: block;

    width: 100%;
    height: 100%;

    max-width: none;
    max-height: none;

    min-width: 100%;
    min-height: 100%;

    object-fit: cover;

    object-position: center center;

    margin: 0;
    padding: 0;

    border: 0;

    transition:
        transform 0.5s ease;
}


.biwa-gallery__cell:hover img {
    transform: scale(1.02);
}


/* =====================================================
   ARROWS
===================================================== */

.biwa-gallery__arrow {
    position: absolute;

    top: 50%;

    width: 44px;
    height: 44px;

    margin: 0;
    padding: 0;

    transform: translateY(-50%);

    display: flex;

    align-items: center;
    justify-content: center;

    border: 0;
    border-radius: 0;

    background: rgba(0, 0, 0, 0.25);

    color: #fff;

    font-family: Arial, sans-serif;

    font-size: 30px;
    line-height: 1;

    cursor: pointer;

    z-index: 50;

    transition:
        background 0.25s ease;
}


.biwa-gallery__arrow:hover {
    background: rgba(0, 0, 0, 0.5);
}


.biwa-gallery__arrow--prev {
    left: 20px;
}


.biwa-gallery__arrow--next {
    right: 20px;
}


/* =====================================================
   DOTS
===================================================== */

.biwa-gallery__dots {
    position: absolute;

    left: 50%;
    bottom: 20px;

    transform: translateX(-50%);

    display: flex;

    align-items: center;

    gap: 8px;

    z-index: 50;
}


.biwa-gallery__dot {
    width: 8px;
    height: 8px;

    margin: 0;
    padding: 0;

    border: 0;
    border-radius: 50%;

    background: #fff;

    opacity: 0.4;

    cursor: pointer;

    transition:
        opacity 0.25s ease,
        transform 0.25s ease;
}


.biwa-gallery__dot.is-active {
    opacity: 1;

    transform: scale(1.15);
}


/* =====================================================
   LIGHTBOX
===================================================== */

.biwa-gallery-lightbox {
    position: fixed;

    inset: 0;

    display: none;

    align-items: center;
    justify-content: center;

    width: 100vw;
    height: 100vh;

    background: rgba(0, 0, 0, 0.92);

    z-index: 999999;

    overflow: hidden;

    touch-action: none;
}


.biwa-gallery-lightbox.is-open {
    display: flex;
}


/* =====================================================
   LIGHTBOX IMAGE WRAPPER
===================================================== */

.biwa-gallery-lightbox__images {
    position: relative;

    display: flex;

    align-items: center;
    justify-content: center;

    width: 90vw;
    height: 90vh;

    max-width: 90vw;
    max-height: 90vh;

    overflow: hidden;

    touch-action: none;
}


/* =====================================================
   LIGHTBOX IMAGES
===================================================== */

.biwa-gallery-lightbox__image {
    position: absolute;

    top: 50%;
    left: 50%;

    display: block;

    width: auto;
    height: auto;

    max-width: 100%;
    max-height: 100%;

    transform:
        translate(-50%, -50%)
        scale(1);

    object-fit: contain;

    user-select: none;
    -webkit-user-select: none;

    -webkit-user-drag: none;

    pointer-events: none;

    opacity: 0;

    will-change:
        opacity,
        transform;

    transition:
        opacity 0.6s ease,
        transform 0.6s ease;
}


.biwa-gallery-lightbox__image.is-current {
    opacity: 1;

    z-index: 2;
}


.biwa-gallery-lightbox__image.is-next {
    opacity: 0;

    z-index: 1;
}


/* =====================================================
   LIGHTBOX CLOSE
===================================================== */

.biwa-gallery-lightbox__close {
    position: absolute;

    top: 20px;
    right: 25px;

    width: 42px;
    height: 42px;

    margin: 0;
    padding: 0;

    border: 0;

    background: transparent;

    color: #fff;

    font-size: 38px;
    line-height: 1;

    cursor: pointer;

    z-index: 20;
}


/* =====================================================
   LIGHTBOX NAVIGATION
===================================================== */

.biwa-gallery-lightbox__prev,
.biwa-gallery-lightbox__next {
    position: absolute;

    top: 50%;

    width: 55px;
    height: 70px;

    margin: 0;
    padding: 0;

    transform: translateY(-50%);

    border: 0;

    background: transparent;

    color: #fff;

    font-size: 50px;
    line-height: 1;

    cursor: pointer;

    z-index: 20;

    transition:
        opacity 0.25s ease;
}


.biwa-gallery-lightbox__prev:hover,
.biwa-gallery-lightbox__next:hover {
    opacity: 0.65;
}


.biwa-gallery-lightbox__prev {
    left: 20px;
}


.biwa-gallery-lightbox__next {
    right: 20px;
}


/* =====================================================
   MOBILE
===================================================== */

@media (max-width: 767px) {

    .biwa-gallery__arrow {
        width: 38px;
        height: 38px;

        font-size: 26px;
    }


    .biwa-gallery__arrow--prev {
        left: 10px;
    }


    .biwa-gallery__arrow--next {
        right: 10px;
    }


    .biwa-gallery-lightbox__images {
        width: 94vw;
        height: 85vh;

        max-width: 94vw;
        max-height: 85vh;
    }


    .biwa-gallery-lightbox__prev {
        left: 0;
    }


    .biwa-gallery-lightbox__next {
        right: 0;
    }

}