woocommerce/plugins/woocommerce-blocks/assets/js/blocks/product-gallery/style.scss

$gallery: ".wc-block-product-gallery";
$large-image: "#{$gallery}-large-image";
$thumbnails: "#{$gallery}-thumbnails";
$next-previous: "#{$large-image}-next-previous";
$next-previous-left-off: "#{$next-previous}-left--off";
$next-previous-right-off: "#{$next-previous}-right--off";
$gallery-next-previous-outside-image: "#{$gallery}[data-next-previous-buttons-position='outsideTheImage']:not(.is-single-product-gallery-image)";

$outside-image-offset: 30px;
$outside-image-max-width: calc(100% - (2 * $outside-image-offset));

// Product Gallery
#{$gallery} {
	dialog {
		position: fixed;
		width: 90vw;
		height: 90vh;
		top: 0;
		margin: $gap-largest;
		z-index: 9999;
	}
}

// Large Image
#{$large-image} {
	width: 100%;
	height: fit-content;
	position: relative;
	overflow: hidden;

	// Restrict the width of the Large Image when the Next/Previous buttons are outside the image.
	#{$gallery-next-previous-outside-image} & .wc-block-woocommerce-product-gallery-large-image__container {
		overflow: hidden;
		max-width: $outside-image-max-width;
		margin: 0 auto;
	}

	img {
		display: block;
		margin: 0 auto;
		transition: all 0.1s linear;

		&.wc-block-woocommerce-product-gallery-large-image__image--hoverZoom {
			cursor: zoom-in;
		}

		&[hidden] {
			display: none;
		}
	}

	.wc-block-product-gallery-large-image__inner-blocks {
		display: flex;
		flex-direction: column;
		position: absolute;
		pointer-events: none;
		z-index: 1;
		width: 100%;
		height: 100%;
		top: 0;

		// Reset the margin of the inner blocks when the Next/Previous buttons are outside the image.
		#{$gallery-next-previous-outside-image} & > * {
			margin-left: $outside-image-offset;
			margin-right: $outside-image-offset;
		}
	}
}

// Next/Previous Buttons
#{$next-previous} {
	display: flex;
	position: absolute;
	flex-direction: row;
	justify-content: space-between;
	width: 100%;
	height: 100%;

	.is-vertically-aligned-top {
		align-items: flex-start;
	}

	.is-vertically-aligned-center {
		align-items: center;
	}

	.is-vertically-aligned-bottom {
		align-items: flex-end;
	}
}

// Next/Previous Buttons Settings
.wc-block-product-gallery-large-image-next-previous-settings {
	width: 100%;
}

// Next/Previous Buttons Off Setting
#{$next-previous-left-off},
#{$next-previous-right-off} {
	display: none;
}

//  Next/Previous Buttons Inside the Image Settings
.wc-block-product-gallery-large-image-next-previous-left--inside-image {
	margin-left: 15px;
}

.wc-block-product-gallery-large-image-next-previous-right--inside-image {
	margin-right: 15px;
}

// Next/Previous Buttons Outside the Image Settings
#{$gallery-next-previous-outside-image} .wc-block-product-gallery-large-image-next-previous-left--outside-image {
	bottom: 0;
	left: 0;
	position: absolute;
}

#{$gallery-next-previous-outside-image} .wc-block-product-gallery-large-image-next-previous-right--outside-image {
	bottom: 0;
	right: 0;
	position: absolute;
}

#{$gallery-next-previous-outside-image} #{$large-image} #{$next-previous} {
	margin-right: 0;
	margin-left: 0;
}

.wc-block-product-gallery-large-image-next-previous-container {
	display: flex;
	flex-direction: row;
	justify-content: space-between;
	position: absolute;
	height: 50px;
	width: 100%;

	&.wc-block-product-gallery-large-image-next-previous--inside-image {
		margin-top: 15px;
		margin-bottom: 15px;
	}
}

// Pager
.wc-block-product-gallery-pager__pager {
	display: flex;
	justify-content: center;
	list-style: none;
	gap: $gap-small;
	padding: 0;
}

.wc-block-product-gallery-pager__item {
	@include font-size(regular);
	color: $gray-600;
	cursor: pointer;
}

// Despite the guideline suggests that the state class should be named like "...--is-active"
// this is not possible due to limitations in the Interactivity API that does not allow
// to use the "--" (double dash) in the class name.
.wc-block-woocommerce-product-gallery-pager-item-is-active {
	font-weight: bold;
	color: $black;
}

// Thumbnails
#{$thumbnails} {
	img {
		cursor: pointer;
	}

	.is-vertical & {
		display: flex;
		flex-direction: row;
	}

	.wc-block-product-gallery-thumbnails__thumbnail {
		width: 100px;
		height: 100px;
		margin: 5px;

	}
}