/* Chapter Post — reading UI (theme-agnostic).
   Themes restyle by overriding the CSS variables on .sc-reader, or any .sc-* rule. */
.sc-reader {
	--sc-accent: #2563eb;
	--sc-on-accent: #ffffff;
	--sc-panel-bg: #ffffff;
	--sc-text: #0f172a;
	--sc-muted: #64748b;
	--sc-border: #e6eaf0;
	--sc-active-bg: #eff4ff;
}

/* Top progress bar */
.sc-progress {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	height: 3px;
	background: transparent;
	z-index: 2147483000;
	pointer-events: none;
}
.sc-progress__bar {
	display: block;
	height: 100%;
	width: 0;
	background: var(--sc-accent);
	transition: width 0.08s linear;
}

/* In-content chapter heading (shown by un-integrated themes) */
.sc-chapter-heading { line-height: 1.15; }

/* Thin "reading progress by chapter" bar under the post title. */
.sc-chapterbar {
	margin: 0 0 20px;
}
.sc-chapterbar__label {
	display: block;
	margin-bottom: 6px;
	font-size: 0.72em;
	font-weight: 700;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--sc-muted, #64748b);
}
.sc-chapterbar__track {
	display: block;
	height: 4px;
	border-radius: 999px;
	background: var(--sc-active-bg, #eff4ff);
	overflow: hidden;
}
.sc-chapterbar__fill {
	display: block;
	height: 100%;
	border-radius: inherit;
	background-color: var(--sc-accent, #2563eb);
	background-image: linear-gradient(90deg, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0));
	transition: width 0.3s ease;
}

/* Prev / next nav — outlined "cards": a chevron on the outer edge, a small
   uppercase PREV/NEXT CHAPTER N label, and the chapter title beneath. */
.sc-nav {
	display: flex;
	flex-wrap: nowrap;
	align-items: stretch;
	gap: 10px;
	margin-top: 8px;
}
.sc-nav__link {
	flex: 1 1 0;
	min-width: 0;
	display: flex;
	align-items: center;
	gap: 8px;
	padding: 12px 16px;
	border: none;
	border-radius: 12px;
	background-color: var(--sc-accent, #2563eb);
	background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0));
	text-decoration: none;
	color: var(--sc-on-accent, #fff);
	box-shadow: 0 4px 14px -6px rgba(37, 99, 235, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.18);
	transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}
.sc-nav__link:hover {
	transform: translateY(-1px);
	filter: brightness(1.05);
	box-shadow: 0 10px 22px -8px rgba(37, 99, 235, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}
/* Chevrons hug the outer edge so the label/title get the rest of the card. */
.sc-nav__prev { padding-left: 6px; }
.sc-nav__next { text-align: right; padding-right: 6px; }
/* Text column (label + title). min-width:0 lets the title ellipsize. */
.sc-nav__body {
	display: flex;
	flex-direction: column;
	gap: 2px;
	min-width: 0;
}
.sc-nav__next .sc-nav__body { align-items: flex-end; }
.sc-nav__dir {
	font-size: 0.68em;
	font-weight: 700;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: rgba(255, 255, 255, 0.8);
	white-space: nowrap;
}
.sc-nav__title {
	max-width: 100%;
	font-size: 0.88em;
	font-weight: 400;
	color: var(--sc-on-accent, #fff);
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}
.sc-nav__chevron {
	flex: 0 0 auto;
	display: inline-flex;
	align-items: center;
	color: rgba(255, 255, 255, 0.85);
}
/* Disabled edge (first / last chapter): faded, non-interactive. */
.sc-nav__link.is-disabled {
	opacity: 0.5;
	pointer-events: none;
	cursor: default;
}

@media (max-width: 640px) {
	.sc-nav { gap: 8px; }
	.sc-nav__link { padding: 10px 12px; gap: 6px; }
	.sc-nav__prev { padding-left: 4px; }
	.sc-nav__next { padding-right: 4px; }
	.sc-nav__dir { font-size: 0.6em; letter-spacing: 0.02em; }
	.sc-nav__chevron svg { width: 16px; height: 16px; }
}

/* Desktop: drop the edge placeholder so a single real card fills the row. */
@media (min-width: 641px) {
	.sc-nav__link.is-disabled { display: none; }
}

/* Floating toggle / FAB — docked to the right edge, vertically centered (a side handle) */
.sc-fab {
	position: fixed;
	right: 0;
	top: 50%;
	transform: translateY(-50%);
	z-index: 2147483000;
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 12px 16px 12px 12px;
	border: none;
	border-radius: 999px 0 0 999px;
	background: var(--sc-accent);
	color: var(--sc-on-accent);
	font: 600 15px/1 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
	cursor: pointer;
	box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
}
.sc-fab:hover { filter: brightness(1.05); }
.sc-fab__icon { display: inline-flex; }
.sc-fab__count { letter-spacing: 0.02em; }

/* TOC popup — a floating card anchored to the right-edge handle, vertically centered (desktop) */
.sc-toc {
	position: fixed;
	right: 64px;
	top: 50%;
	width: 370px;
	max-width: calc(100vw - 84px);
	max-height: min(80vh, 620px);
	background: var(--sc-panel-bg);
	color: var(--sc-text);
	z-index: 2147483001;
	border: 1px solid var(--sc-border);
	border-radius: 16px;
	box-shadow: 0 20px 55px rgba(15, 23, 42, 0.28);
	transform: translate(14px, -50%) scale(0.96);
	transform-origin: center right;
	opacity: 0;
	visibility: hidden;
	transition: opacity 0.18s ease, transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
	display: flex;
	flex-direction: column;
	overflow: hidden;
}
.sc-toc.is-open { opacity: 1; visibility: visible; transform: translate(0, -50%) scale(1); }

.sc-toc__head {
	display: flex;
	align-items: center;
	gap: 10px;
	padding: 18px 20px;
	border-bottom: 1px solid var(--sc-border);
}
.sc-toc__book { color: var(--sc-accent); display: inline-flex; }
.sc-toc__post {
	flex: 1 1 auto;
	font-weight: 700;
	font-size: 15px;
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}
.sc-toc__close {
	flex: 0 0 auto;
	border: none;
	background: transparent;
	font-size: 26px;
	line-height: 1;
	cursor: pointer;
	color: var(--sc-muted);
}
.sc-toc__label {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 14px 20px 8px;
	font-size: 12px;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--sc-muted);
}
.sc-toc__total {
	background: var(--sc-active-bg);
	color: var(--sc-accent);
	border-radius: 999px;
	padding: 2px 9px;
	font-size: 12px;
}
.sc-toc__list {
	list-style: none;
	margin: 0;
	padding: 0 10px 24px;
	overflow-y: auto;
	flex: 1 1 auto;
}
.sc-toc__link {
	display: flex;
	align-items: center;
	gap: 12px;
	padding: 12px 12px;
	border-radius: 10px;
	text-decoration: none;
	color: var(--sc-text);
	transition: background 0.15s;
}
.sc-toc__link:hover { background: var(--sc-active-bg); }
.sc-toc__item.is-active .sc-toc__link { background: var(--sc-active-bg); }
.sc-toc__num {
	flex: 0 0 auto;
	width: 34px;
	height: 34px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border-radius: 999px;
	background: #f1f5f9;
	color: var(--sc-muted);
	font-weight: 700;
	font-size: 13px;
}
.sc-toc__item.is-active .sc-toc__num { background: var(--sc-accent); color: var(--sc-on-accent); }
.sc-toc__text {
	font-size: 14px;
	font-weight: 600;
	line-height: 1.3;
	overflow: hidden;
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
}

/* Click-catcher. Transparent on desktop (chat-box style, page stays visible);
   dimmed on mobile where the popup becomes a bottom sheet. */
.sc-reader__overlay {
	position: fixed;
	inset: 0;
	background: transparent;
	z-index: 2147483000;
	opacity: 0;
	transition: opacity 0.2s;
}
.sc-reader__overlay.is-open { opacity: 1; }

@media (max-width: 640px) {
	/* Dock the toggle to the right edge, vertically centered (a side handle). */
	.sc-fab {
		right: 0;
		left: auto;
		top: 50%;
		bottom: auto;
		transform: translateY(-50%);
		padding: 12px 16px 12px 12px;
		border-radius: 999px 0 0 999px;
		box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
	}
	.sc-toc {
		right: 0;
		left: 0;
		bottom: 0;
		width: 100%;
		max-width: 100%;
		max-height: 82vh;
		border-radius: 18px 18px 0 0;
		border-left: 0;
		border-right: 0;
		border-bottom: 0;
		transform: translateY(100%) scale(1);
		transform-origin: bottom center;
	}
	.sc-toc.is-open { transform: translateY(0) scale(1); }
	.sc-reader__overlay { background: rgba(15, 23, 42, 0.45); }
}