woocommerce/plugins/woocommerce-admin/client/launch-your-store/hub/main-content/pages/site-preview.scss

// Resizable frame styles
.edit-site-resizable-frame__inner.is-resizing::before {
	content: "";
	inset: 0;
	position: absolute;
	z-index: 1;
}

.edit-site-resizable-frame__inner-content {
	inset: 0;
	position: absolute;
	z-index: 0;
	height: 100%;
	width: 100%;
}

.edit-site-resizable-frame__handle {
	align-items: center;
	border: 0;
	border-radius: 4px;
	background: var(--wp-admin-theme-color);
	cursor: ew-resize;
	display: flex;
	height: 64px;
	justify-content: flex-end;
	padding: 0;
	position: absolute;
	top: calc(50% - 32px);
	width: 4px;
	z-index: 100;
}

.edit-site-resizable-frame__handle::before {
	content: "";
	height: 100%;
	left: 100%;
	position: absolute;
	width: 32px;
}

.edit-site-resizable-frame__handle::after {
	content: "";
	height: 100%;
	position: absolute;
	right: 100%;
	width: 32px;
}

.edit-site-resizable-frame__handle:focus-visible {
	outline: 2px solid #0000;
}

.edit-site-resizable-frame__handle.is-resizing,
.edit-site-resizable-frame__handle:focus,
.edit-site-resizable-frame__handle:hover {
	background-color: var(--wp-admin-theme-color);
}

.launch-store-site-preview-page__container {
	height: 100vh;
	width: 100%;
	position: relative;
	z-index: 3;

	.launch-store-site__preview-site-iframe {
		display: block;
		border: none;
		width: 100%;
		height: 100%;
		border-radius: 20px;
		box-shadow: 0 15px 20px 0 rgba(0, 0, 0, 0.04), 0 13px 15px 0 rgba(0, 0, 0, 0.03), 0 6px 10px 0 rgba(0, 0, 0, 0.02), 0 0 1px 0 rgba(0, 0, 0, 0.25);
		overflow-y: auto;
	}

	.launch-store-site-preview-site__loading-overlay {
		border-radius: 20px;
		position: absolute;
		display: flex;
		justify-content: center;
		align-items: center;
		z-index: 1;
		background-color: #fff;
		opacity: 0.9;
		height: 100%;
		width: 100%;
	}

	.launch-store-preview-layout__canvas {
		align-items: center;
		bottom: 0;
		display: flex;
		justify-content: center;
		position: absolute;
		top: 0;
		left: -32px; // Make room for the handle on the left side for maximum width
		width: calc(100% + 32px);
		padding: 16px 16px 16px 32px;
	}
}