/* Online page-image reader — Archive.org-like 1-up / 2-up */

.bp-reader-page {
	max-width: 1480px;
	margin: 0 auto;
}

/* Reader shares .bp-library (1200px); widen only this page so the dashboard stays as-is. */
.bp-library.bp-reader-page {
	max-width: 1480px;
	padding: 1rem 1.5rem 2rem;
}

/* Compact reader header — slim title bar replacing the full dashboard welcome. */
.bp-reader-compact-header {
	display: flex;
	align-items: center;
	gap: 1rem;
	margin-bottom: 0.75rem;
	font-size: 0.9rem;
}

.bp-reader-compact-title {
	color: var(--bp-text-charcoal, #232c37);
	font-weight: 600;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}

.bp-reader-preview-banner {
	display: none;
	width: 100%;
	box-sizing: border-box;
	padding: 0.55rem 1rem;
	text-align: center;
	font-size: 0.875rem;
	line-height: 1.45;
	font-weight: 500;
	color: #1e3a5f;
	background: rgba(184, 212, 240, 0.92);
	border: 1px solid rgba(30, 58, 95, 0.14);
	border-radius: 8px;
}

.bp-reader-preview-banner:not([hidden]) {
	display: block;
}

/* Immersive expand — fills the viewport as a fixed overlay. */
body.bp-reader-expanded {
	overflow: hidden;
	--bp-reader-rail-width: 3.6rem;
}

body.bp-reader-expanded:has(.bp-book-reader.is-rail-open) {
	--bp-reader-rail-width: 13rem;
}

body.bp-reader-expanded .bp-inkwell-header,
body.bp-reader-expanded .bl-site-footer,
body.bp-reader-expanded .bp-library-header {
	display: none;
}

body.bp-reader-expanded .bp-library.bp-reader-page {
	position: fixed;
	inset: 0;
	z-index: 200;
	max-width: none;
	margin: 0;
	padding: 0;
	background: var(--bp-bg-cream, #F6F3EF);
	display: flex;
	flex-direction: column;
	overflow: hidden;
}

body.bp-reader-expanded .bp-reader-compact-header {
	position: absolute;
	top: 0;
	left: 0;
	right: var(--bp-reader-rail-width);
	z-index: 30;
	flex-shrink: 0;
	flex-direction: column;
	align-items: stretch;
	gap: 0.4rem;
	margin: 0;
	padding: 0.55rem 1rem 0.65rem;
	background: linear-gradient(180deg, rgba(246, 243, 239, 0.98) 0%, rgba(246, 243, 239, 0.9) 72%, rgba(246, 243, 239, 0.55));
	pointer-events: none;
}

body.bp-reader-expanded .bp-reader-compact-header.has-preview-notice {
	padding-bottom: 0.75rem;
}

body.bp-reader-expanded .bp-reader-compact-title {
	font-size: 0.95rem;
	pointer-events: auto;
}

body.bp-reader-expanded .bp-reader-preview-banner {
	font-size: 0.8125rem;
	padding: 0.5rem 0.85rem;
	pointer-events: auto;
	box-shadow: 0 1px 3px rgba(30, 58, 95, 0.08);
}

body.bp-reader-expanded .bp-book-reader {
	flex: 1;
	min-height: 0;
	position: relative;
	display: flex;
	flex-direction: column;
	gap: 0;
	margin-top: 0;
}

body.bp-reader-expanded .bp-reader-toolbar {
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	left: auto;
	z-index: 40;
	width: var(--bp-reader-rail-width);
	flex-direction: column;
	flex-wrap: nowrap;
	align-items: stretch;
	justify-content: flex-start;
	gap: 0.2rem;
	padding: 0.45rem 0.4rem 0.75rem;
	overflow: visible;
	background: rgba(246, 243, 239, 0.97);
	border-left: 1px solid rgba(15, 23, 42, 0.08);
	box-shadow: -8px 0 24px rgba(15, 23, 42, 0.06);
}

body.bp-reader-expanded .bp-reader-slider-row {
	position: absolute;
	left: 0;
	right: var(--bp-reader-rail-width);
	bottom: 0;
	z-index: 30;
	flex-shrink: 0;
	margin: 0;
	padding: 0.55rem 1rem 0.4rem;
	background: linear-gradient(0deg, rgba(246, 243, 239, 0.96) 0%, rgba(246, 243, 239, 0.72) 70%, transparent);
}

body.bp-reader-expanded .bp-reader-bottom-bar {
	display: none;
}

body.bp-reader-expanded .bp-reader-layout {
	flex: 1;
	min-height: 0;
	position: relative;
	display: flex;
	flex-direction: column;
}

body.bp-reader-expanded .bp-reader-stage {
	flex: 1;
	min-height: 0;
	display: flex;
	flex-direction: column;
	background: var(--bp-bg-cream, #F6F3EF);
	border-radius: 0;
	overflow-x: hidden;
	overflow-y: hidden;
	perspective: none;
	padding-top: 2.35rem;
}

body.bp-reader-expanded:has(.bp-reader-compact-header.has-preview-notice) .bp-reader-stage {
	padding-top: 5.5rem;
}

body.bp-reader-expanded .bp-book-reader:has(.bp-reader-spread.has-sample-gap) .bp-reader-stage {
	overflow-y: auto;
}

body.bp-reader-expanded .bp-reader-spread {
	flex: 1;
	min-height: 0;
	height: 100%;
	padding: 0.35rem 0;
	padding-right: var(--bp-reader-rail-width);
}

body.bp-reader-expanded .bp-reader-leaf {
	flex: 0 0 auto;
	max-width: 47vw;
	max-height: 100%;
	width: auto;
	height: 100%;
	aspect-ratio: var(--bp-page-aspect, 0.772727);
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

body.bp-reader-expanded .bp-reader-leaf img {
	width: 100%;
	height: 100%;
	object-fit: contain;
}

body.bp-reader-expanded .bp-reader-bottom-bar .bp-reader-prev,
body.bp-reader-expanded .bp-reader-bottom-bar .bp-reader-next {
	display: none;
}

body.bp-reader-expanded .bp-reader-nav {
	justify-content: center;
}

/* 1-up expand Fit: whole page visible in the window. */
body.bp-reader-expanded .bp-reader-spread[data-mode="1up"] {
	justify-content: center;
	align-items: center;
	height: 100%;
	min-height: 0;
	padding: 0.35rem 1.25rem;
	padding-right: calc(var(--bp-reader-rail-width) + 0.5rem);
}

body.bp-reader-expanded .bp-reader-spread[data-mode="1up"] .bp-reader-leaf-left {
	width: auto;
	max-width: 100%;
	max-height: 100%;
	height: 100%;
	aspect-ratio: var(--bp-page-aspect, 0.772727);
}

body.bp-reader-expanded .bp-reader-spread[data-mode="2up"] .bp-reader-leaf {
	max-width: 47vw;
}

/* Exit control lives in the expand rail — keep the floating button hidden. */
.bp-reader-exit-btn {
	display: none;
}

body.bp-reader-expanded .bp-reader-exit-btn {
	display: none;
}

body.bp-reader-expanded .bp-reader-side {
	position: absolute;
	top: 0;
	bottom: 0;
	z-index: 20;
	max-height: none;
	width: min(320px, 80vw);
	box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
	overflow: auto;
}

body.bp-reader-expanded .bp-reader-side-left {
	left: 0;
	border-radius: 0 12px 12px 0;
}

body.bp-reader-expanded .bp-reader-side-right {
	right: var(--bp-reader-rail-width);
	border-radius: 12px 0 0 12px;
}

/* Auto-hide chrome in expanded mode after idle. The right rail stays put. */
body.bp-reader-expanded .bp-reader-compact-header,
body.bp-reader-expanded .bp-reader-bottom-bar,
body.bp-reader-expanded .bp-reader-slider-row {
	transition: opacity 0.3s ease, visibility 0.3s ease;
}

body.bp-reader-expanded .bp-reader-chrome-hidden .bp-reader-compact-header,
body.bp-reader-expanded .bp-reader-chrome-hidden .bp-reader-bottom-bar,
body.bp-reader-expanded .bp-reader-chrome-hidden .bp-reader-slider-row {
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
}

.bp-book-reader {
	display: flex;
	flex-direction: column;
	gap: 0.75rem;
	margin-top: 0.5rem;
}

.bp-reader-toolbar {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem;
}

/* Compact tool / mode buttons — scoped so site-wide .bp-btn stays large. */
.bp-book-reader .bp-reader-toolbar .bp-btn,
.bp-book-reader .bp-reader-toolbar .bp-btn-secondary {
	padding: 0.35rem 0.75rem;
	font-size: 0.8rem;
	line-height: 1.2;
	box-shadow: none;
	border-width: 1px;
}

.bp-book-reader .bp-reader-toolbar .bp-btn:hover,
.bp-book-reader .bp-reader-toolbar .bp-btn-secondary:hover {
	transform: none;
	box-shadow: none;
}

/* Menu toggle is Expand-only (ChatGPT-style right rail). */
.bp-reader-toolbar > .bp-reader-rail-toggle {
	display: none;
}

.bp-reader-expand .bp-reader-expand-icon-expand,
.bp-reader-expand .bp-reader-expand-icon-exit {
	display: none;
}

/* Expanded mode is always "exit expand" — show the collapse icon only. */
body.bp-reader-expanded .bp-reader-expand .bp-reader-expand-icon-expand {
	display: none !important;
}

body.bp-reader-expanded .bp-reader-expand .bp-reader-expand-icon-exit {
	display: block !important;
}

.bp-reader-contents-toggle .bp-reader-tool-icon,
.bp-reader-home-link .bp-reader-tool-icon,
.bp-reader-focus .bp-reader-tool-icon,
.bp-reader-recall .bp-reader-tool-icon,
.bp-reader-mode .bp-reader-tool-icon,
.bp-reader-tool-buy .bp-reader-tool-icon {
	display: none;
}

.bp-reader-tool-btn--icon .bp-reader-tool-label {
	display: none;
}

body.bp-reader-expanded .bp-reader-toolbar > .bp-reader-rail-toggle {
	display: inline-flex;
}

body.bp-reader-expanded .bp-reader-toolbar .bp-reader-study-tools,
body.bp-reader-expanded .bp-reader-toolbar .bp-reader-modes {
	flex-direction: column;
	flex-wrap: nowrap;
	align-items: stretch;
	justify-content: flex-start;
	gap: 0.15rem;
	width: 100%;
	overflow: visible;
}

body.bp-reader-expanded .bp-reader-toolbar .bp-reader-modes {
	margin-top: 0.35rem;
	padding-top: 0.35rem;
	border-top: 1px solid rgba(15, 23, 42, 0.1);
}

body.bp-reader-expanded .bp-reader-toolbar .bp-reader-tool {
	display: flex;
	width: 100%;
	overflow: visible;
}

body.bp-reader-expanded .bp-book-reader .bp-reader-toolbar .bp-btn,
body.bp-reader-expanded .bp-book-reader .bp-reader-toolbar .bp-btn-secondary {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.7rem;
	width: 100%;
	min-height: 2.4rem;
	padding: 0.5rem 0.45rem;
	border: none;
	border-radius: 8px;
	background: transparent;
	color: #0f172a;
	font-weight: 500;
	position: relative;
	overflow: visible;
}

body.bp-reader-expanded .bp-book-reader.is-rail-open .bp-reader-toolbar .bp-btn,
body.bp-reader-expanded .bp-book-reader.is-rail-open .bp-reader-toolbar .bp-btn-secondary {
	justify-content: flex-start;
	padding-left: 0.55rem;
	padding-right: 0.7rem;
}

body.bp-reader-expanded .bp-book-reader .bp-reader-toolbar .bp-btn:hover,
body.bp-reader-expanded .bp-book-reader .bp-reader-toolbar .bp-btn-secondary:hover {
	background: rgba(15, 23, 42, 0.07);
}

body.bp-reader-expanded .bp-book-reader .bp-reader-toolbar .bp-btn.is-active,
body.bp-reader-expanded .bp-book-reader .bp-reader-toolbar .bp-btn[aria-pressed="true"],
body.bp-reader-expanded .bp-book-reader .bp-reader-toolbar .bp-btn[aria-expanded="true"] {
	background: rgba(15, 23, 42, 0.09);
	color: #0f172a;
	border-color: transparent;
}

body.bp-reader-expanded .bp-reader-toolbar .bp-reader-tool-icon {
	display: block;
}

body.bp-reader-expanded .bp-book-reader:not(.is-rail-open) .bp-reader-toolbar .bp-reader-tool-label {
	position: absolute;
	top: 50%;
	right: calc(100% + 0.55rem);
	left: auto;
	z-index: 60;
	display: block;
	width: auto;
	height: auto;
	overflow: visible;
	clip: auto;
	padding: 0.32rem 0.7rem;
	border-radius: 999px;
	background: #0d0d0d;
	color: #fff;
	font-size: 0.8125rem;
	font-weight: 500;
	line-height: 1.2;
	white-space: nowrap;
	pointer-events: none;
	opacity: 0;
	visibility: hidden;
	transform: translateY(-50%);
	box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
	transition: opacity 0.12s ease, visibility 0.12s ease;
}

body.bp-reader-expanded .bp-book-reader:not(.is-rail-open) .bp-reader-toolbar .bp-btn:hover .bp-reader-tool-label,
body.bp-reader-expanded .bp-book-reader:not(.is-rail-open) .bp-reader-toolbar .bp-btn:focus-visible .bp-reader-tool-label {
	opacity: 1;
	visibility: visible;
}

body.bp-reader-expanded .bp-book-reader.is-rail-open .bp-reader-tool-label {
	position: static;
	display: inline;
	width: auto;
	height: auto;
	overflow: visible;
	clip: auto;
	padding: 0;
	border-radius: 0;
	background: transparent;
	color: inherit;
	font-size: inherit;
	font-weight: inherit;
	line-height: inherit;
	white-space: nowrap;
	pointer-events: auto;
	opacity: 1;
	visibility: visible;
	transform: none;
	box-shadow: none;
}

.bp-reader-modes,
.bp-reader-nav {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	flex-shrink: 0;
}

.bp-reader-page-label {
	min-width: 0;
	flex-shrink: 0;
	text-align: right;
	font-size: 0.75rem;
	line-height: 1.2;
	white-space: nowrap;
	color: #334155;
}

.bp-reader-mode.is-active {
	background: var(--bp-primary-rust, #0d9ca4);
	color: #fff;
	border-color: transparent;
}

.bp-reader-stage {
	position: relative;
	min-height: min(72vh, calc(100dvh - 14rem));
	background:
		radial-gradient(ellipse at top, rgba(13, 156, 164, 0.08), transparent 55%),
		linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
	border-radius: 12px;
	overflow: hidden;
	outline: none;
	perspective: 2600px;
	perspective-origin: 50% 45%;
	cursor: pointer;
}

/* Side navigation arrows (design-like large circles). */
.bp-reader-side-nav {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	width: 3.25rem;
	height: 3.25rem;
	border-radius: 999px;
	border: none;
	background: rgba(15, 23, 42, 0.18);
	color: #f8fafc;
	display: flex;
	align-items: center;
	justify-content: center;
	box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
	cursor: pointer;
	z-index: 40;
	transition: background 0.2s ease, opacity 0.2s ease;
}

.bp-reader-side-prev {
	left: 0.75rem;
}

.bp-reader-side-next {
	right: 0.75rem;
}

.bp-reader-side-nav:hover {
	background: rgba(15, 23, 42, 0.3);
}

.bp-reader-side-nav:disabled {
	opacity: 0.45;
	cursor: not-allowed;
}

.bp-reader-side-nav-icon {
	font-size: 0;
	width: 1rem;
	height: 1rem;
	position: relative;
}

.bp-reader-side-nav-icon::before {
	content: '';
	position: absolute;
	left: 50%;
	top: 50%;
	width: 0.6rem;
	height: 0.6rem;
	border-top: 0.18rem solid currentColor;
	border-right: 0.18rem solid currentColor;
	transform-origin: center;
}

.bp-reader-side-prev .bp-reader-side-nav-icon::before {
	transform: translate(-50%, -50%) rotate(225deg);
}

.bp-reader-side-next .bp-reader-side-nav-icon::before {
	transform: translate(-50%, -50%) rotate(45deg);
}

body.bp-reader-expanded .bp-reader-side-nav {
	color: #0f172a;
	position: fixed;
	top: 50%;
	transform: translateY(-50%);
	z-index: 25;
}

/* Old expanded caps removed — immersive mode handles sizing via body.bp-reader-expanded. */

.bp-reader-spread {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: center;
	gap: 0;
	min-height: inherit;
	padding: 1.25rem;
}

.bp-reader-spread-pages {
	display: flex;
	flex: 1 1 auto;
	align-items: center;
	justify-content: center;
	min-width: 0;
	min-height: 0;
	width: 100%;
}

/* Sample preview: omitted master pages between allowlisted pages. */
.bp-reader-sample-gap {
	flex: 0 0 100%;
	width: 100%;
	box-sizing: border-box;
	margin: 0.35rem 0 0.5rem;
	padding: 0.65rem 1rem;
	text-align: center;
	font-size: 0.9rem;
	line-height: 1.35;
	color: #1e3a5f;
	background: #b8d4f0;
	border-radius: 2px;
	white-space: pre-line;
}

.bp-reader-sample-gap[hidden] {
	display: none;
}

.bp-reader-sample-gap--between {
	flex: 0 0 auto;
	width: auto;
	max-width: 6.5rem;
	margin: 0 0.35rem;
	padding: 0.55rem 0.45rem;
	font-size: 0.78rem;
	align-self: stretch;
	display: flex;
	align-items: center;
	justify-content: center;
	white-space: normal;
}

.bp-reader-spread[data-mode="1up"] .bp-reader-sample-gap--between {
	display: none;
}

body.bp-reader-expanded .bp-reader-spread.has-sample-gap {
	flex-direction: column;
	flex-wrap: nowrap;
	align-items: center;
	justify-content: flex-start;
}

body.bp-reader-expanded .bp-reader-spread.has-sample-gap .bp-reader-sample-gap {
	flex: 0 0 auto;
	width: 100%;
	margin: 0 0 0.5rem;
	position: sticky;
	top: 0;
	z-index: 3;
}

body.bp-reader-expanded .bp-reader-spread.has-sample-gap .bp-reader-sample-gap--between {
	display: none;
}

body.bp-reader-expanded .bp-reader-spread.has-sample-gap .bp-reader-spread-pages {
	flex: 1 1 auto;
	min-height: 0;
	width: 100%;
}

body.bp-reader-expanded .bp-reader-spread[data-mode="1up"] .bp-reader-spread-pages {
	flex: 1 1 auto;
	min-height: 0;
	height: 100%;
	width: 100%;
	align-items: center;
	justify-content: center;
}

body.bp-reader-expanded .bp-reader-spread[data-mode="2up"] .bp-reader-spread-pages {
	flex: 1 1 auto;
	min-height: 0;
	height: 100%;
	width: 100%;
	align-items: center;
	justify-content: center;
}

body.bp-reader-expanded .bp-reader-spread[data-mode="2up"].is-solo-spread .bp-reader-spread-pages {
	justify-content: center;
}

body.bp-reader-expanded .bp-reader-spread[data-mode="2up"].is-solo-spread .bp-reader-leaf:not([hidden]) {
	max-width: min(92vw, 1000px);
	width: auto;
	height: 100%;
	max-height: 100%;
	flex: 0 0 auto;
}

body.bp-reader-expanded .bp-reader-spread[data-mode="1up"].has-sample-gap .bp-reader-leaf-left {
	height: auto;
	max-height: calc(100% - 2.75rem);
	flex: 1 1 auto;
}

body.bp-reader-expanded .bp-reader-sample-gap {
	max-width: min(100%, 1000px);
	margin-left: auto;
	margin-right: auto;
}

body.bp-reader-expanded .bp-reader-spread[data-mode="2up"] .bp-reader-sample-gap:not(.bp-reader-sample-gap--between) {
	max-width: min(100%, calc(94vw - var(--bp-reader-rail-width, 0px)));
}

.bp-reader-leaf {
	margin: 0;
	background: #fff;
	box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
	flex: 1 1 0;
	min-width: 0;
	width: 100%;
	max-width: min(42vw, 640px);
	max-height: calc(min(72vh, calc(100dvh - 14rem)) - 2.5rem);
	/* Shared frame so cover/outliers don't dwarf facing pages or the flipper. */
	aspect-ratio: var(--bp-page-aspect, 0.772727);
	display: flex;
	align-items: center;
	justify-content: center;
	overflow: hidden;
}

/* .bp-book-reader.is-expanded leaf caps — superseded by body.bp-reader-expanded rules above. */

.bp-reader-spread[data-mode="1up"] .bp-reader-leaf-left {
	max-width: min(92vw, 960px);
}

.bp-reader-leaf-left {
	border-radius: 4px 0 0 4px;
}

.bp-reader-leaf-right {
	border-radius: 0 4px 4px 0;
	border-left: 1px solid rgba(15, 23, 42, 0.12);
}

.bp-reader-spread[data-mode="1up"] .bp-reader-leaf-left {
	border-radius: 4px;
}

.bp-reader-leaf img {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: contain;
	object-position: center;
	background: #f8fafc;
}

.bp-reader-leaf[hidden] {
	display: none;
}

.bp-reader-leaf img.is-blank {
	visibility: hidden;
}

/* Turning leaf */

.bp-reader-flipper {
	position: absolute;
	transform: rotateY(0deg);
	transform-style: preserve-3d;
	will-change: transform;
	pointer-events: none;
	z-index: 5;
}

.bp-reader-flipper-face {
	position: absolute;
	inset: 0;
	overflow: hidden;
	background: #fff;
	backface-visibility: hidden;
	-webkit-backface-visibility: hidden;
	box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.bp-reader-flipper-face img {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: contain;
	background: #fff;
}

.bp-reader-flipper-back {
	transform: rotateY(180deg);
}

.bp-reader-flipper-shade {
	position: absolute;
	inset: 0;
	opacity: 0;
	transition: opacity var(--bp-flip-ms, 1100ms) ease-in-out;
	pointer-events: none;
}

.bp-reader-flipper-front .bp-reader-flipper-shade {
	background: linear-gradient(90deg, rgba(15, 23, 42, 0.45) 0%, rgba(15, 23, 42, 0) 45%);
}

.bp-reader-flipper-back .bp-reader-flipper-shade {
	background: linear-gradient(270deg, rgba(15, 23, 42, 0.45) 0%, rgba(15, 23, 42, 0) 45%);
	opacity: 0.55;
}

.bp-reader-flipper.is-turning .bp-reader-flipper-front .bp-reader-flipper-shade {
	opacity: 0.55;
}

.bp-reader-flipper.is-turning .bp-reader-flipper-back .bp-reader-flipper-shade {
	opacity: 0;
}

.bp-reader-flipper.is-backward .bp-reader-flipper-front .bp-reader-flipper-shade {
	background: linear-gradient(270deg, rgba(15, 23, 42, 0.45) 0%, rgba(15, 23, 42, 0) 45%);
}

.bp-reader-flipper.is-backward .bp-reader-flipper-back .bp-reader-flipper-shade {
	background: linear-gradient(90deg, rgba(15, 23, 42, 0.45) 0%, rgba(15, 23, 42, 0) 45%);
}

/* 1-up slide transition */
.bp-reader-slide {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 5;
	pointer-events: none;
}

.bp-reader-slide img {
	max-width: 100%;
	max-height: 100%;
	object-fit: contain;
}

.bp-reader-slide-out-up {
	animation: bpSlideOutUp 350ms ease both;
}
.bp-reader-slide-in-up {
	animation: bpSlideInUp 350ms ease both;
}
.bp-reader-slide-out-down {
	animation: bpSlideOutDown 350ms ease both;
}
.bp-reader-slide-in-down {
	animation: bpSlideInDown 350ms ease both;
}

@keyframes bpSlideOutUp {
	to { transform: translateY(-25%); opacity: 0; }
}
@keyframes bpSlideInUp {
	from { transform: translateY(25%); opacity: 0; }
}
@keyframes bpSlideOutDown {
	to { transform: translateY(25%); opacity: 0; }
}
@keyframes bpSlideInDown {
	from { transform: translateY(-25%); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
	.bp-reader-flipper,
	.bp-reader-flipper-shade {
		transition: none !important;
	}

	.bp-reader-slide {
		animation: none !important;
	}

	.bp-reader-progress.is-waiting .bp-reader-progress-bar,
	.bp-reader-spinner {
		animation: none;
	}
}

/* Turn progress + loading indicator */

.bp-reader-progress {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 3px;
	overflow: hidden;
	opacity: 0;
	transition: opacity 200ms ease;
	pointer-events: none;
	z-index: 8;
	background: rgba(226, 232, 240, 0.12);
}

.bp-reader-progress.is-visible {
	opacity: 1;
}

.bp-reader-progress-bar {
	display: block;
	width: 0;
	height: 100%;
	background: var(--bp-primary-rust, #0d9ca4);
}

.bp-reader-progress.is-waiting .bp-reader-progress-bar {
	width: 35%;
	animation: bp-reader-indeterminate 1100ms ease-in-out infinite;
}

@keyframes bp-reader-indeterminate {
	0% {
		transform: translateX(-100%);
	}

	100% {
		transform: translateX(320%);
	}
}

.bp-reader-loading {
	position: absolute;
	left: 50%;
	bottom: 1.25rem;
	transform: translateX(-50%);
	display: flex;
	align-items: center;
	gap: 0.55rem;
	padding: 0.45rem 0.9rem;
	border-radius: 999px;
	background: rgba(15, 23, 42, 0.82);
	color: #e2e8f0;
	font-size: 0.85rem;
	pointer-events: none;
	z-index: 9;
}

.bp-reader-loading[hidden] {
	display: none;
}

.bp-reader-loading.is-message .bp-reader-spinner {
	display: none;
}

.bp-reader-spinner {
	width: 1rem;
	height: 1rem;
	border-radius: 50%;
	border: 2px solid rgba(226, 232, 240, 0.35);
	border-top-color: var(--bp-primary-rust, #0d9ca4);
	animation: bp-reader-spin 700ms linear infinite;
}

@keyframes bp-reader-spin {
	to {
		transform: rotate(360deg);
	}
}

.bp-reader-status {
	position: absolute;
	inset: 0;
	display: grid;
	place-items: center;
	margin: 0;
	padding: 1rem;
	color: #e2e8f0;
	font-size: 1rem;
	pointer-events: none;
	background: rgba(15, 23, 42, 0.35);
}

.bp-reader-status[hidden] {
	display: none;
}

.bp-reader-status.is-error {
	color: #fecaca;
}

.bp-reader-slider-row {
	display: flex;
	align-items: center;
	gap: 0.75rem;
	padding: 0.1rem 0.25rem 0.25rem;
}

.bp-reader-slider {
	flex: 1;
	min-width: 0;
	height: 1.05rem;
	margin: 0;
	accent-color: var(--bp-primary-rust, #0d9ca4);
}

.bp-reader-study-tools {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.55rem;
}

.bp-reader-tool {
	position: relative;
	display: inline-flex;
	align-items: center;
}

.bp-reader-tool-btn--icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 0.45rem;
	min-width: 2.1rem;
	min-height: 2.1rem;
}

.bp-reader-tool-icon {
	display: block;
	flex-shrink: 0;
}

.bp-reader-bookmark .bp-reader-bookmark-shape {
	fill: none;
}

.bp-reader-bookmark.is-active .bp-reader-bookmark-shape {
	fill: currentColor;
}

.bp-reader-bookmark.is-active .bp-reader-bookmark-plus {
	display: none;
}

.bp-reader-tool-tip {
	position: absolute;
	left: 0;
	bottom: calc(100% + 0.45rem);
	z-index: 30;
	width: max-content;
	max-width: min(240px, 70vw);
	padding: 0.45rem 0.6rem;
	border-radius: 8px;
	background: #0f172a;
	color: #f8fafc;
	font-size: 0.75rem;
	font-weight: 500;
	line-height: 1.35;
	box-shadow: 0 8px 24px rgba(15, 23, 42, 0.28);
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
	transform: translateY(0.15rem);
	transition: opacity 0.12s ease, transform 0.12s ease, visibility 0.12s ease;
}

.bp-reader-tool-tip::after {
	content: "";
	position: absolute;
	top: 100%;
	left: 1rem;
	border: 5px solid transparent;
	border-top-color: #0f172a;
}

.bp-reader-tool:hover .bp-reader-tool-tip,
.bp-reader-tool:focus-within .bp-reader-tool-tip {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

body.bp-reader-expanded .bp-reader-tool-tip {
	display: none;
}

.bp-reader-study-tools .is-active,
.bp-reader-bookmark.is-active,
.bp-reader-focus.is-active {
	background: var(--bp-primary-rust, #0d9ca4);
	color: #fff;
	border-color: transparent;
}

.bp-reader-layout {
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	gap: 0.75rem;
}

.bp-reader-layout:has(.bp-reader-side-left:not([hidden])):not(:has(.bp-reader-side-right:not([hidden]))) {
	grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
}

.bp-reader-layout:has(.bp-reader-side-right:not([hidden])):not(:has(.bp-reader-side-left:not([hidden]))) {
	grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
}

.bp-reader-layout:has(.bp-reader-side-left:not([hidden])):has(.bp-reader-side-right:not([hidden])) {
	grid-template-columns: minmax(240px, 300px) minmax(0, 1fr) minmax(240px, 300px);
}

.bp-reader-bottom-bar {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: center;
	gap: 0.5rem;
	padding-top: 0;
}

.bp-reader-side {
	background: #f8fafc;
	border: 1px solid #e2e8f0;
	border-radius: 12px;
	padding: 0.85rem 1rem;
	max-height: min(72vh, calc(100dvh - 14rem));
	overflow: auto;
}

.bp-reader-panel-title {
	margin: 0 0 0.75rem;
	font-size: 1rem;
}

.bp-reader-bookmarks-list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 0.5rem;
}

.bp-reader-bookmark-item {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.5rem;
}

.bp-reader-bookmark-jump {
	flex: 1;
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	gap: 0.2rem;
	text-align: left;
	font-size: 0.85rem;
}

.bp-reader-bookmark-page {
	line-height: 1.3;
}

.bp-reader-bookmark-tag + .bp-reader-bookmark-page {
	font-size: 0.72rem;
	font-weight: 500;
	color: #64748b;
}

.bp-reader-bookmark-tag {
	font-size: 0.92rem;
	font-weight: 600;
	color: var(--bp-bg-navy, #0f2b4a);
	line-height: 1.35;
	white-space: normal;
	word-break: break-word;
}

.bp-reader-bookmark-remove {
	flex: 0 0 auto;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 0.45rem;
	min-width: 2rem;
	min-height: 2rem;
	border: 1px solid #cbd5e1;
	border-radius: 6px;
	background: #f8fafc;
	color: #64748b;
	cursor: pointer;
	box-shadow: none;
}

.bp-reader-bookmark-remove:hover {
	background: #fee2e2;
	border-color: #fecaca;
	color: #b91c1c;
}

.bp-reader-bookmark-remove-icon {
	display: block;
}

.bp-reader-study-tabs {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 0.3rem;
	margin-bottom: 1rem;
	padding: 0.25rem;
	border-radius: 9px;
	background: #e2e8f0;
}

.bp-reader-study-tab {
	border: 0;
	border-radius: 7px;
	padding: 0.45rem 0.3rem;
	background: transparent;
	color: #475569;
	font: inherit;
	font-size: 0.78rem;
	font-weight: 600;
	cursor: pointer;
}

.bp-reader-study-tab.is-active {
	background: #fff;
	color: #0f172a;
	box-shadow: 0 1px 3px rgba(15, 23, 42, 0.15);
}

.bp-reader-study-section[hidden] {
	display: none;
}

.bp-reader-study-section > h4 {
	margin: 0 0 0.7rem;
	font-size: 0.95rem;
}

.bp-reader-study-info-chapter,
.bp-reader-study-info-session {
	margin: 0 0 0.4rem;
	font-size: 0.82rem;
	color: #475569;
}

.bp-reader-study-stats {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 0.4rem;
	margin: 0.8rem 0 1rem;
}

.bp-reader-study-stat {
	display: flex;
	min-width: 0;
	flex-direction: column;
	gap: 0.2rem;
	padding: 0.55rem 0.35rem;
	border: 1px solid #e2e8f0;
	border-radius: 8px;
	background: #fff;
	text-align: center;
}

.bp-reader-study-stat strong {
	color: var(--bp-primary-rust, #0d9ca4);
	font-size: 1.2rem;
	font-variant-numeric: tabular-nums;
}

.bp-reader-study-stat span {
	color: #64748b;
	font-size: 0.68rem;
	line-height: 1.25;
}

.bp-reader-setting {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.5rem;
	margin-top: 0.6rem;
	font-size: 0.85rem;
	color: #334155;
}

.bp-reader-setting-check {
	justify-content: flex-start;
}

.bp-reader-setting input[type="number"] {
	width: 5rem;
	padding: 0.25rem 0.4rem;
	border: 1px solid #cbd5e1;
	border-radius: 6px;
	font: inherit;
}

.bp-reader-setting input:disabled {
	opacity: 0.5;
}

.bp-reader-setting-note {
	margin: 0.65rem 0 0;
	font-size: 0.78rem;
	color: #64748b;
}

.bp-reader-bookmark-label-field input {
	width: 100%;
	margin-bottom: 0.6rem;
	padding: 0.55rem 0.65rem;
	border: 1px solid #cbd5e1;
	border-radius: 8px;
	font: inherit;
}

.bp-reader-bookmark-tags {
	display: flex;
	flex-wrap: wrap;
	gap: 0.4rem;
	margin-bottom: 1rem;
}

.bp-reader-tag-chip {
	border: 1px solid #cbd5e1;
	background: #f8fafc;
	border-radius: 999px;
	padding: 0.25rem 0.7rem;
	font-size: 0.8rem;
	cursor: pointer;
	color: #334155;
}

.bp-reader-tag-chip:hover {
	border-color: var(--bp-primary-rust, #0d9ca4);
	color: var(--bp-primary-rust, #0d9ca4);
}

.bp-reader-bookmarks-empty {
	margin: 0;
	color: #64748b;
	font-size: 0.9rem;
}

.bp-reader-tips-list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 0.75rem;
}

.bp-reader-tips-list p {
	margin: 0.25rem 0 0;
	font-size: 0.9rem;
	color: #475569;
}

.bp-reader-study-chapter {
	padding: 0.75rem 0;
	border-top: 1px solid #e2e8f0;
}

.bp-reader-study-chapter.is-current {
	background: rgba(13, 156, 164, 0.06);
	margin: 0 -0.5rem;
	padding-left: 0.5rem;
	padding-right: 0.5rem;
	border-radius: 8px;
}

.bp-reader-study-chapter h4 {
	margin: 0 0 0.5rem;
	font-size: 0.95rem;
}

.bp-reader-study-current {
	display: inline-block;
	margin-left: 0.35rem;
	padding: 0.1rem 0.4rem;
	border-radius: 999px;
	background: var(--bp-primary-rust, #0d9ca4);
	color: #fff;
	font-size: 0.7rem;
	font-weight: 600;
	vertical-align: middle;
}

.bp-reader-contents-nav {
	display: flex;
	flex-direction: column;
	gap: 0.15rem;
}

.bp-reader-contents-empty {
	margin: 0;
	font-size: 0.9rem;
	color: #64748b;
}

.bp-reader-toc-item {
	display: flex;
	flex-wrap: wrap;
	align-items: flex-start;
	gap: 0.15rem 0.25rem;
}

.bp-reader-toc-item.is-current > .bp-reader-toc-link {
	background: rgba(13, 156, 164, 0.12);
	color: #0f766e;
	font-weight: 600;
}

.bp-reader-toc-toggle {
	flex: 0 0 auto;
	width: 1.4rem;
	height: 1.4rem;
	margin: 0.1rem 0 0;
	padding: 0;
	border: 0;
	border-radius: 4px;
	background: transparent;
	color: #64748b;
	cursor: pointer;
	line-height: 1;
}

.bp-reader-toc-toggle:hover {
	background: #e2e8f0;
	color: #0f172a;
}

.bp-reader-toc-toggle.is-leaf {
	visibility: hidden;
	pointer-events: none;
}

.bp-reader-toc-link {
	flex: 1 1 0;
	min-width: 0;
	display: block;
	margin: 0;
	padding: 0.35rem 0.45rem;
	border: 0;
	border-radius: 6px;
	background: transparent;
	color: #1e293b;
	font: inherit;
	font-size: 0.88rem;
	text-align: left;
	cursor: pointer;
	line-height: 1.35;
}

.bp-reader-toc-link:hover {
	background: #e2e8f0;
}

.bp-reader-toc-item.is-locked > .bp-reader-toc-link {
	color: #94a3b8;
	cursor: pointer;
}

.bp-reader-toc-item.is-locked > .bp-reader-toc-link:hover {
	background: #f1f5f9;
	color: #64748b;
}

.bp-reader-toc-children {
	display: none;
	flex: 1 1 100%;
	flex-direction: column;
	gap: 0.15rem;
	margin: 0 0 0.15rem 0.65rem;
	padding: 0;
	list-style: none;
}

.bp-reader-toc-item.is-open > .bp-reader-toc-children {
	display: flex;
}

.bp-reader-study-activities {
	list-style: none;
	margin: 0.5rem 0 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 0.35rem;
}

.bp-reader-study-empty {
	margin: 0.35rem 0 0;
	color: #64748b;
	font-size: 0.85rem;
}

.bp-reader-jump-chapter {
	font-size: 0.8rem;
	padding: 0.25rem 0.55rem;
}

.bp-reader-overlay {
	position: absolute;
	inset: 0;
	display: grid;
	place-items: center;
	padding: 1rem;
	background: rgba(15, 23, 42, 0.55);
	z-index: 12;
	cursor: default;
}

.bp-reader-overlay[hidden] {
	display: none;
}

.bp-reader-overlay-card {
	width: min(100%, 420px);
	background: #fff;
	border-radius: 12px;
	padding: 1.25rem 1.35rem;
	box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
	color: #0f172a;
}

.bp-reader-overlay-title {
	margin: 0 0 0.5rem;
	font-size: 1.15rem;
}

.bp-reader-overlay-body {
	margin: 0 0 0.85rem;
	color: #475569;
	line-height: 1.45;
}

.bp-toc-read-sample {
	margin: 0.75rem 0 0;
}

.bp-reader-page--sample .bp-reader-compact-header {
	display: flex;
	flex-direction: column;
	align-items: stretch;
	gap: 0.5rem;
}

.bp-reader-page--sample .bp-reader-compact-title {
	flex: 0 0 auto;
}

.bp-reader-tool-buy .bp-btn {
	white-space: nowrap;
}

.bp-reader-home-link {
	text-decoration: none;
	color: inherit;
}

.bp-reader-home-link:hover,
.bp-reader-home-link:focus-visible {
	text-decoration: none;
	color: inherit;
}

.bp-reader-overlay-actions .bp-reader-sample-buy-btn {
	min-width: 10rem;
}

.bp-reader-sample-buy-overlay .bp-reader-overlay-actions {
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 0.5rem;
}

.bp-reader-break-timer {
	margin: 0 0 1rem;
	font-size: 1.5rem;
	font-variant-numeric: tabular-nums;
	color: var(--bp-primary-rust, #0d9ca4);
}

.bp-reader-overlay-actions {
	display: flex;
	justify-content: flex-end;
	gap: 0.5rem;
}

.bp-reader-activity-modal {
	position: fixed;
	inset: 0;
	z-index: 9999;
	display: grid;
	place-items: center;
	padding: clamp(0.5rem, 3vw, 2.5rem);
}

.bp-reader-activity-modal[hidden] {
	display: none;
}

.bp-reader-activity-backdrop {
	position: absolute;
	inset: 0;
	background: rgba(15, 23, 42, 0.65);
}

.bp-reader-activity-dialog {
	position: relative;
	display: flex;
	flex-direction: column;
	width: min(100%, 980px);
	height: min(92vh, 900px);
	overflow: hidden;
	border-radius: 14px;
	background: #fff;
	box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
}

.bp-reader-activity-bar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	padding: 0.75rem 1rem;
	border-bottom: 1px solid #e2e8f0;
	background: #f8fafc;
}

.bp-reader-activity-title {
	margin: 0;
	font-size: 1rem;
	color: #0f172a;
}

.bp-reader-activity-tools {
	display: flex;
	align-items: center;
	gap: 0.75rem;
}

.bp-reader-activity-open {
	font-size: 0.82rem;
	color: #475569;
	text-decoration: underline;
}

.bp-reader-activity-close {
	border: 1px solid #cbd5e1;
	border-radius: 8px;
	padding: 0.35rem 0.8rem;
	background: #fff;
	color: #0f172a;
	font: inherit;
	font-size: 0.85rem;
	cursor: pointer;
}

.bp-reader-activity-close:hover {
	border-color: var(--bp-primary-rust, #0d9ca4);
	color: var(--bp-primary-rust, #0d9ca4);
}

.bp-reader-activity-frame {
	flex: 1;
	width: 100%;
	border: 0;
}

body.bp-reader-modal-open {
	overflow: hidden;
}

@media (max-width: 900px) {
	.bp-reader-layout:has(.bp-reader-side-left:not([hidden])),
	.bp-reader-layout:has(.bp-reader-side-right:not([hidden])),
	.bp-reader-layout:has(.bp-reader-side-left:not([hidden])):has(.bp-reader-side-right:not([hidden])) {
		grid-template-columns: 1fr;
	}

	.bp-reader-side {
		max-height: 45vh;
	}
}

@media (max-width: 720px) {
	.bp-reader-bottom-bar {
		flex-direction: column;
		align-items: stretch;
	}
}

@media (max-width: 720px) {
	.bp-reader-toolbar {
		flex-direction: column;
		align-items: stretch;
	}

	.bp-reader-modes,
	.bp-reader-nav,
	.bp-reader-study-tools {
		justify-content: center;
	}

	.bp-reader-spread[data-mode="2up"] {
		flex-direction: column;
		gap: 0.75rem;
	}

	.bp-reader-leaf,
	.bp-reader-spread[data-mode="1up"] .bp-reader-leaf-left {
		max-width: 100%;
		border-radius: 4px;
		border-left: 0;
	}
}