/* VReader — reading features. Host colors/fonts come from inline :root vars (--vr-*). */

.vreader-toc,
.vreader-summary,
.vreader-panel {
	--vr-a: var(--vr-accent, #5b4a63);
	--vr-rgb: var(--vr-accent-rgb, 91, 74, 99);
	--vr-ink: #2d2a2c;
	--vr-muted: #6f686c;
	--vr-card: #fffdfb;
	--vr-line: rgba(var(--vr-rgb), .16);
	box-sizing: border-box;
	font-family: var(--vr-body-font, inherit);
	text-indent: 0;
	text-align: left;
	color: var(--vr-ink);
}
.vreader-toc *,
.vreader-summary *,
.vreader-panel * {
	box-sizing: border-box;
	text-indent: 0;
}

/* Headings targeted by the TOC */
.vreader-anchor { scroll-margin-top: var(--vr-anchor-offset, 90px); }

/* Shared focus ring */
.vreader-toc :focus-visible,
.vreader-summary :focus-visible,
.vreader-panel :focus-visible {
	outline: 2px solid var(--vr-a);
	outline-offset: 2px;
	border-radius: 8px;
}

/* ---------- TOC ---------- */
.vreader-toc { margin: 0 0 1.6em; }
.vreader-toc__details { margin: 0; padding: 0; border: 0; }
.vreader-toc__pill {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	min-height: 40px;
	padding: 6px 14px 6px 12px;
	border: 1px solid rgba(var(--vr-rgb), .28);
	border-radius: 999px;
	background: var(--vr-card);
	color: var(--vr-a);
	font: 600 14px/1.2 var(--vr-body-font, inherit);
	letter-spacing: .01em;
	cursor: pointer;
	list-style: none;
	user-select: none;
	box-shadow: 0 1px 2px rgba(var(--vr-rgb), .08);
	transition: background-color .2s, border-color .2s, box-shadow .2s;
}
.vreader-toc__pill::-webkit-details-marker { display: none; }
.vreader-toc__pill::marker { content: ""; }
.vreader-toc__pill:hover { background: rgba(var(--vr-rgb), .07); border-color: rgba(var(--vr-rgb), .45); }
.vreader-toc__count {
	min-width: 22px;
	padding: 2px 7px;
	border-radius: 999px;
	background: rgba(var(--vr-rgb), .12);
	font-size: 12px;
	font-weight: 600;
	text-align: center;
}
.vreader-toc__chev { transition: transform .2s; }
.vreader-toc__details[open] .vreader-toc__chev { transform: rotate(180deg); }
.vreader-toc__details[open] .vreader-toc__pill { background: var(--vr-a); border-color: var(--vr-a); color: #fff; }
.vreader-toc__details[open] .vreader-toc__count { background: rgba(255, 255, 255, .22); }

.vreader-toc__list {
	margin: 10px 0 0 !important;
	padding: 10px 8px !important;
	list-style: none !important;
	background: var(--vr-card);
	border: 1px solid var(--vr-line);
	border-radius: 16px;
	box-shadow: 0 10px 30px -18px rgba(var(--vr-rgb), .45);
	max-width: 640px;
	counter-reset: vrtoc;
}
.vreader-toc__item {
	margin: 0 !important;
	padding: 0 !important;
	list-style: none !important;
	line-height: 1.45;
	font-size: 15px;
}
.vreader-toc__item::before { content: none !important; display: none !important; }
.vreader-toc__item a {
	display: flex;
	gap: 10px;
	padding: 8px 12px;
	border-radius: 10px;
	color: var(--vr-ink) !important;
	text-decoration: none !important;
	border: 0 !important;
	box-shadow: none !important;
	transition: background-color .15s, color .15s;
}
.vreader-toc__item a:hover { background: rgba(var(--vr-rgb), .07); color: var(--vr-a) !important; }
.vreader-toc__item--d0 { counter-increment: vrtoc; }
.vreader-toc__item--d0 a { font-weight: 600; }
.vreader-toc__item--d0 a::before {
	content: counter(vrtoc);
	flex: 0 0 auto;
	min-width: 1.4em;
	color: var(--vr-a);
	font-variant-numeric: tabular-nums;
}
.vreader-toc__item--d1 a { padding-left: calc(12px + 1.4em + 10px); font-size: 14px; color: var(--vr-muted) !important; }
.vreader-toc__item--d2 a { padding-left: calc(12px + 1.4em + 26px); font-size: 14px; color: var(--vr-muted) !important; }
.vreader-toc__item--d3 a { padding-left: calc(12px + 1.4em + 42px); font-size: 13.5px; color: var(--vr-muted) !important; }
.vreader-toc__item--d1 a:hover,
.vreader-toc__item--d2 a:hover,
.vreader-toc__item--d3 a:hover { color: var(--vr-a) !important; }

/* ---------- Summary ---------- */
.vreader-summary {
	margin: 2.2em 0 1.4em;
	padding: 20px 20px 18px;
	background: linear-gradient(180deg, rgba(var(--vr-rgb), .075), rgba(var(--vr-rgb), .02) 70%), var(--vr-card);
	border: 1px solid var(--vr-line);
	border-left: 4px solid var(--vr-a);
	border-radius: 18px;
	box-shadow: 0 1px 2px rgba(var(--vr-rgb), .06);
}
.vreader-summary .vreader-summary__title {
	display: flex;
	align-items: center;
	gap: 8px;
	margin: 0 0 12px !important;
	padding: 0 !important;
	border: 0 !important;
	background: none !important;
	font-family: var(--vr-heading-font, inherit) !important;
	font-size: 1.3rem !important;
	font-weight: 700 !important;
	line-height: 1.25 !important;
	letter-spacing: 0 !important;
	text-transform: none !important;
	color: var(--vr-a) !important;
}
.vreader-summary__title::before,
.vreader-summary__title::after { content: none !important; display: none !important; }
.vreader-summary__icon { flex: 0 0 auto; opacity: .85; }
.vreader-summary__lead { margin: 0 0 12px; font-size: 1rem; line-height: 1.7; color: var(--vr-ink); }
.vreader-summary .vreader-summary__sub {
	margin: 4px 0 8px !important;
	padding: 0 !important;
	border: 0 !important;
	font-family: var(--vr-body-font, inherit) !important;
	font-size: 12px !important;
	font-weight: 700 !important;
	letter-spacing: .08em !important;
	text-transform: uppercase !important;
	line-height: 1.4 !important;
	color: var(--vr-muted) !important;
}
.vreader-summary__sub::before,
.vreader-summary__sub::after { content: none !important; display: none !important; }
.vreader-summary__list { margin: 0 !important; padding: 0 !important; list-style: none !important; }
.vreader-summary__list li {
	position: relative;
	margin: 0 0 8px !important;
	padding: 0 0 0 22px !important;
	list-style: none !important;
	line-height: 1.65;
	font-size: 1rem;
}
.vreader-summary__list li:last-child { margin-bottom: 0 !important; }
.vreader-summary__list li::before {
	content: "" !important;
	position: absolute;
	left: 4px;
	top: .62em;
	width: 7px;
	height: 7px;
	border-radius: 50%;
	background: var(--vr-a);
	opacity: .8;
}
.vreader-summary__list--links a { color: var(--vr-ink) !important; text-decoration: none !important; border-bottom: 1px solid rgba(var(--vr-rgb), .3) !important; box-shadow: none !important; }
.vreader-summary__list--links a:hover { color: var(--vr-a) !important; border-bottom-color: var(--vr-a) !important; }

/* ---------- Reader panel ---------- */
.vreader-panel { display: none; }
html.vr-js .vreader-panel {
	display: block;
	margin: 1.4em 0 2em;
	padding: 6px;
	background: var(--vr-card);
	border: 1px solid var(--vr-line);
	border-radius: 999px;
	box-shadow: 0 1px 2px rgba(var(--vr-rgb), .06), 0 8px 24px -18px rgba(var(--vr-rgb), .35);
	font-size: 14px;
	line-height: 1.4;
}
/* One compact row: the title/hint stay for screen readers only */
.vreader-panel__head { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; margin: 0; }
.vreader-panel__grid {
	display: flex;
	flex-wrap: nowrap;
	align-items: center;
	gap: 0;
	overflow-x: auto;
	overflow-y: hidden;
	scrollbar-width: none;
	-webkit-overflow-scrolling: touch;
}
.vreader-panel__grid::-webkit-scrollbar { display: none; }
.vreader-ctl {
	display: flex;
	flex: 0 0 auto;
	flex-wrap: nowrap;
	align-items: center;
	gap: 8px;
	padding: 0 10px;
	margin: 0;
	background: none;
}
.vreader-ctl:first-child { padding-left: 0; }
.vreader-ctl:last-child { padding-right: 4px; }
.vreader-ctl + .vreader-ctl { border-left: 1px solid var(--vr-line); }
.vreader-ctl[hidden] { display: none !important; }
/* Stop only appears while reading aloud: keeps the row short */
.vreader-panel .vreader-icon-btn:disabled { display: none; }
.vreader-ctl__label { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.vreader-panel .vreader-btn {
	-webkit-appearance: none;
	appearance: none;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	min-height: 36px;
	margin: 0;
	padding: 0 14px;
	border: 1px solid rgba(var(--vr-rgb), .28);
	border-radius: 999px;
	background: #fff;
	color: var(--vr-a);
	font: 600 14px/1 var(--vr-body-font, inherit);
	letter-spacing: 0;
	text-transform: none;
	text-decoration: none;
	box-shadow: none;
	cursor: pointer;
	transition: background-color .15s, color .15s, border-color .15s, opacity .15s;
	width: auto;
	height: auto;
}
.vreader-panel .vreader-btn:hover { background: rgba(var(--vr-rgb), .08); border-color: rgba(var(--vr-rgb), .45); color: var(--vr-a); }
.vreader-panel .vreader-btn:disabled { opacity: .45; cursor: default; background: #fff; }

/* font segmented control */
.vreader-seg { display: inline-flex; border: 1px solid rgba(var(--vr-rgb), .28); border-radius: 999px; background: #fff; overflow: hidden; }
.vreader-panel .vreader-seg__btn { border: 0; border-radius: 0; min-width: 40px; padding: 0 12px; font-family: var(--vr-body-font, inherit); font-size: 14px; font-weight: 700; }
.vreader-panel .vreader-seg__btn + .vreader-seg__btn { border-left: 1px solid rgba(var(--vr-rgb), .18); }
.vreader-panel .vreader-seg__btn--mid { font-size: 16px; }
.vreader-panel .vreader-seg__btn--big { font-size: 19px; }
.vreader-panel .vreader-seg__btn[aria-pressed="true"] { background: rgba(var(--vr-rgb), .12); }
.vreader-dots { display: none; gap: 5px; align-items: center; }
.vreader-dots i { width: 6px; height: 6px; border-radius: 50%; background: rgba(var(--vr-rgb), .22); transition: background-color .15s, transform .15s; }
.vreader-dots i.is-on { background: var(--vr-a); transform: scale(1.25); }
.vreader-sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* book switch */
.vreader-panel .vreader-switch { padding: 0 14px 0 8px; }
.vreader-switch__track { position: relative; width: 34px; height: 20px; border-radius: 999px; background: rgba(var(--vr-rgb), .22); transition: background-color .2s; }
.vreader-switch__knob { position: absolute; top: 3px; left: 3px; width: 14px; height: 14px; border-radius: 50%; background: #fff; box-shadow: 0 1px 2px rgba(0, 0, 0, .25); transition: transform .2s; }
.vreader-switch[aria-pressed="true"] .vreader-switch__track { background: var(--vr-a); }
.vreader-switch[aria-pressed="true"] .vreader-switch__knob { transform: translateX(14px); }

/* audio */
.vreader-audio__row { display: flex; flex-wrap: nowrap; align-items: center; gap: 8px; }
.vreader-panel .vreader-play { background: var(--vr-a); border-color: var(--vr-a); color: #fff; padding: 0 16px 0 13px; }
.vreader-panel .vreader-play:hover { background: var(--vr-a); color: #fff; opacity: .9; }
.vreader-ico--pause { display: none; }
.vreader-play[aria-pressed="true"] .vreader-ico--play { display: none; }
.vreader-play[aria-pressed="true"] .vreader-ico--pause { display: inline; }
.vreader-panel .vreader-icon-btn { width: 36px; padding: 0; }
.vreader-speed { display: inline-flex; align-items: center; gap: 8px; margin: 0; font-size: 13px; color: var(--vr-muted); }
.vreader-speed input[type="range"] { width: 80px; margin: 0; accent-color: var(--vr-a); background: transparent; border: 0; box-shadow: none; }
.vreader-speed__val { min-width: 2.8em; font-weight: 600; color: var(--vr-a); font-variant-numeric: tabular-nums; }

/* paragraph currently read aloud */
.vr-speaking {
	background: rgba(var(--vr-accent-rgb, 91, 74, 99), .1) !important;
	box-shadow: 0 0 0 6px rgba(var(--vr-accent-rgb, 91, 74, 99), .1);
	border-radius: 4px;
	transition: background-color .25s, box-shadow .25s;
}

/* font size (only when the visitor changed it; default step is a no-op) */
.vr-fs :is(p, li, blockquote, dd, dt, td, th):not(.vreader-panel *, .vreader-toc *) {
	font-size: var(--vr-fs) !important;
	line-height: 1.75 !important;
}

@media (min-width: 720px) {
	.vreader-summary { padding: 24px 28px 22px; }
}
/* Narrow screens: still one row; labels collapse to icons, the row scrolls if it must */
@media (max-width: 719px) {
	html.vr-js .vreader-panel { border-radius: 16px; }
	html.vr-js .vreader-panel { padding: 5px; }
	.vreader-speed__label,
	.vreader-speed__val { display: none; }
	.vreader-ctl { padding: 0 6px; gap: 6px; }
	.vreader-panel .vreader-seg__btn { min-width: 30px; padding: 0 6px; }
	.vreader-panel .vreader-switch { padding: 0 10px 0 7px; gap: 6px; font-size: 13px; }
	.vreader-switch__text { font-size: 0; }
	.vreader-switch__text::after { content: "Sách"; font-size: 13px; }
	.vreader-panel .vreader-play { width: 36px; padding: 0; }
	.vreader-play__text { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
	.vreader-speed { gap: 4px; }
	.vreader-speed input[type="range"] { width: 52px; }
}

@media (prefers-reduced-motion: reduce) {
	.vreader-toc *, .vreader-panel *, .vr-speaking { transition: none !important; }
}

@media print {
	.vreader-panel, .vreader-toc { display: none !important; }
}