/* Menu flipbook: see flipbook.php. */

.bb-book {
	/* Two A4 pages side by side, never taller than the screen below the header. */
	width: min(100%, 1040px, calc((100svh - 200px) * 1.413));
	margin: 0 auto;
	text-align: center;
}

.bb-book img {
	display: block;
	width: 100%;
	height: auto;
}

/* Before the script runs (or if it never does): a plain stack of pages. */
.bb-book:not(.is-ready) .bb-book__pages {
	display: grid;
	gap: 16px;
	max-width: 560px;
	margin: 0 auto;
}

.bb-book:not(.is-ready) .bb-book__bar {
	display: none;
}

.bb-book.is-ready .bb-book__stage {
	filter: drop-shadow(0 18px 30px rgba(0, 0, 0, 0.35));
}

.bb-book__page {
	background: var(--bb-cream, #f5faf6);
	overflow: hidden;
}

.bb-book__bar {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 24px;
	margin-top: 28px;
	color: var(--bb-cream, #f5faf6);
}

.bb-book__count {
	min-width: 9em;
	font-size: 14px;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	font-variant-numeric: tabular-nums;
}

.bb-book .bb-book__nav {
	width: 48px;
	height: 48px;
	padding: 0;
	border: 1px solid currentColor;
	border-radius: 50%;
	background: transparent;
	color: inherit;
	font-size: 20px;
	line-height: 1;
	cursor: pointer;
	transition: background-color 0.2s, color 0.2s, opacity 0.2s;
}

.bb-book .bb-book__nav:hover:not(:disabled),
.bb-book .bb-book__nav:focus-visible {
	background: var(--bb-accent, #faab5c);
	border-color: var(--bb-accent, #faab5c);
	color: var(--bb-primary, #193f32);
}

.bb-book .bb-book__nav:disabled {
	opacity: 0.3;
	cursor: default;
}