:root {
	--jbr-cream-bg: #f4ecdc;
	--jbr-cream-page: #fffaf0;
	--jbr-cream-ink: #2a2118;
	--jbr-sepia-bg: #d8c2a6;
	--jbr-sepia-page: #f3e6cf;
	--jbr-sepia-ink: #342314;
	--jbr-dark-bg: #171311;
	--jbr-dark-page: #241d1a;
	--jbr-dark-ink: #f4ebdc;
	--jbr-accent: #8a5a35;
	--jbr-shadow: 0 25px 60px rgba(28, 17, 8, 0.18);
}

.jbr-inline-button-wrap {
	margin-top: 2rem;
}

.jbr-inline-book-button {
	display: inline-flex;
	align-items: center;
	padding: 0.9rem 1.25rem;
	border-radius: 999px;
	background: #21160f;
	color: #fff8ef;
	text-decoration: none;
	font-weight: 600;
}

.jbr-library-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: 1.5rem;
}

.jbr-library-card {
	border-radius: 22px;
	overflow: hidden;
	background: #f9f4ea;
	box-shadow: var(--jbr-shadow);
}

.jbr-library-card__link {
	display: block;
	color: inherit;
	text-decoration: none;
}

.jbr-library-card__cover {
	aspect-ratio: 4 / 5;
	background: linear-gradient(135deg, #caa77f, #6e4a2c);
}

.jbr-library-card__cover img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.jbr-library-card__cover--empty {
	background: linear-gradient(135deg, #ead8bf, #b4875a);
}

.jbr-library-card__content {
	padding: 1.2rem;
}

.jbr-reader-shell {
	font-family: Georgia, "Times New Roman", serif;
}

.jbr-book-app {
	min-height: 100vh;
	padding: 24px;
	background:
		radial-gradient(circle at top, rgba(255, 255, 255, 0.45), transparent 38%),
		linear-gradient(180deg, rgba(86, 56, 34, 0.08), transparent 20%),
		var(--jbr-background);
	color: var(--jbr-ink);
}

.jbr-book-app.theme-cream {
	--jbr-background: var(--jbr-cream-bg);
	--jbr-page: var(--jbr-cream-page);
	--jbr-ink: var(--jbr-cream-ink);
	--jbr-edge: rgba(125, 87, 50, 0.18);
}

.jbr-book-app.theme-sepia {
	--jbr-background: var(--jbr-sepia-bg);
	--jbr-page: var(--jbr-sepia-page);
	--jbr-ink: var(--jbr-sepia-ink);
	--jbr-edge: rgba(92, 60, 29, 0.18);
}

.jbr-book-app.theme-dark {
	--jbr-background: var(--jbr-dark-bg);
	--jbr-page: var(--jbr-dark-page);
	--jbr-ink: var(--jbr-dark-ink);
	--jbr-edge: rgba(255, 245, 228, 0.08);
}

.jbr-book-app * {
	box-sizing: border-box;
}

.jbr-book-app button,
.jbr-book-app a {
	font: inherit;
}

.jbr-reader-topbar {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	max-width: 1440px;
	margin: 0 auto 22px;
}

.jbr-reader-brand h1,
.jbr-reader-brand p,
.jbr-page-body h1,
.jbr-page-body h2,
.jbr-page-body h3,
.jbr-page-body h4,
.jbr-page-body p,
.jbr-page-body blockquote,
.jbr-page-body li {
	margin-top: 0;
}

.jbr-reader-brand h1 {
	margin-bottom: 0.35rem;
	font-size: clamp(1.8rem, 2.6vw, 3rem);
}

.jbr-reader-brand p {
	margin-bottom: 0;
	opacity: 0.82;
}

.jbr-reader-controls {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	align-items: center;
}

.jbr-control,
.jbr-nav-button,
.jbr-reader-chip {
	border: 1px solid var(--jbr-edge);
	border-radius: 999px;
	padding: 0.7rem 1rem;
	background: rgba(255, 255, 255, 0.22);
	color: inherit;
	text-decoration: none;
}

.jbr-control,
.jbr-nav-button {
	cursor: pointer;
}

.jbr-progress-bar {
	max-width: 1440px;
	height: 6px;
	margin: 0 auto 20px;
	border-radius: 999px;
	background: rgba(0, 0, 0, 0.08);
	overflow: hidden;
}

.jbr-progress-bar span {
	display: block;
	height: 100%;
	background: linear-gradient(90deg, #a87142, #d8b98f);
}

.jbr-reader-layout {
	display: grid;
	grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
	gap: 22px;
	max-width: 1440px;
	margin: 0 auto;
}

.jbr-book-stage {
	position: relative;
	min-height: 68vh;
	padding: 22px;
	border-radius: 30px;
	background: rgba(255, 255, 255, 0.18);
	box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.jbr-book-spread {
	display: grid;
	grid-template-columns: repeat(var(--jbr-page-columns, 2), minmax(0, 1fr));
	gap: 18px;
	transition: transform 280ms ease, opacity 280ms ease;
}

.jbr-book-spread.is-turning {
	transform: translateX(14px);
	opacity: 0.35;
}

.jbr-page {
	min-height: 62vh;
	padding: clamp(22px, 3vw, 44px);
	border-radius: 24px;
	background: var(--jbr-page);
	box-shadow: var(--jbr-shadow);
	border: 1px solid var(--jbr-edge);
	overflow: hidden;
}

.jbr-page--cover,
.jbr-page--ending {
	display: flex;
	align-items: center;
	justify-content: center;
	text-align: center;
}

.jbr-page-body {
	height: 100%;
	font-size: var(--jbr-font-size, 1.05rem);
	line-height: var(--jbr-line-height, 1.8);
	overflow-wrap: break-word;
}

.jbr-page-body img {
	max-width: 100%;
	height: auto;
	border-radius: 12px;
}

.jbr-page-body blockquote {
	margin: 1.2rem 0;
	padding-left: 1rem;
	border-left: 3px solid var(--jbr-edge);
	font-style: italic;
}

.jbr-page-meta {
	display: flex;
	justify-content: space-between;
	margin-top: 1.25rem;
	padding-top: 0.9rem;
	border-top: 1px solid var(--jbr-edge);
	font-size: 0.92rem;
	opacity: 0.75;
}

.jbr-toc {
	padding: 22px;
	border-radius: 24px;
	background: rgba(255, 255, 255, 0.28);
	border: 1px solid var(--jbr-edge);
	backdrop-filter: blur(4px);
}

.jbr-toc h3 {
	margin-top: 0;
	margin-bottom: 1rem;
}

.jbr-toc button {
	display: flex;
	width: 100%;
	justify-content: space-between;
	gap: 12px;
	padding: 0.75rem 0;
	border: 0;
	background: transparent;
	color: inherit;
	text-align: left;
	cursor: pointer;
	border-bottom: 1px solid var(--jbr-edge);
}

.jbr-toc button.is-active {
	color: var(--jbr-accent);
	font-weight: 700;
}

.jbr-reader-footer {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
	max-width: 1440px;
	margin: 18px auto 0;
}

.jbr-reader-footer__group {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	align-items: center;
}

@media (max-width: 1024px) {
	.jbr-reader-layout {
		grid-template-columns: 1fr;
	}

	.jbr-toc {
		order: -1;
	}
}

@media (max-width: 782px) {
	.jbr-book-app {
		padding: 14px;
	}

	.jbr-book-stage {
		padding: 12px;
	}

	.jbr-book-spread {
		--jbr-page-columns: 1 !important;
	}

	.jbr-page {
		min-height: 58vh;
	}
}