.rbtoc {
	--rbtoc-primary: var(--primary, #00a2ff);
	--rbtoc-primary-dark: var(--primary-dark, #0080cc);
	--rbtoc-primary-light: var(--primary-light, #e6f6ff);
	--rbtoc-accent: var(--accent, #00d084);
	--rbtoc-white: var(--bg-white, #fff);
	--rbtoc-soft: var(--bg-soft, #f8fafc);
	--rbtoc-text: var(--text, #111827);
	--rbtoc-muted: var(--text-muted, #6b7280);
	--rbtoc-border: var(--border-soft, #f3f4f6);
	--rbtoc-radius: var(--radius, 12px);
	position: relative;
	width: 100%;
	margin: 0 0 28px;
	border: 1px solid var(--rbtoc-border);
	border-left: 4px solid var(--rbtoc-primary);
	border-radius: 0 var(--rbtoc-radius) var(--rbtoc-radius) 0;
	background: var(--rbtoc-white);
	box-shadow: var(--shadow-sm, 0 2px 8px rgba(17, 24, 39, 0.06));
	color: var(--rbtoc-text);
	overflow: hidden;
	letter-spacing: 0;
}

.rbtoc *,
.rbtoc *::before,
.rbtoc *::after {
	box-sizing: border-box;
	letter-spacing: 0;
}

.rbtoc-progress {
	position: absolute;
	inset: 0 0 auto;
	height: 3px;
	background: rgba(0, 162, 255, 0.1);
	overflow: hidden;
	z-index: 2;
}

.rbtoc-progress span {
	display: block;
	width: var(--rbtoc-progress, 0%);
	height: 100%;
	background: linear-gradient(90deg, var(--rbtoc-primary), var(--rbtoc-accent));
	transition: width 0.12s linear;
}

.rbtoc-toggle {
	display: flex;
	align-items: center;
	gap: 12px;
	width: 100%;
	min-height: 68px;
	margin: 0;
	padding: 14px 16px;
	border: 0;
	background: transparent;
	color: var(--rbtoc-text);
	font: inherit;
	text-align: left;
	cursor: pointer;
}

.rbtoc-toggle:hover {
	background: var(--rbtoc-soft);
}

.rbtoc-toggle:focus-visible,
.rbtoc-list a:focus-visible {
	outline: 3px solid rgba(0, 162, 255, 0.3);
	outline-offset: -3px;
}

.rbtoc-toggle-icon {
	display: grid;
	gap: 3px;
	flex: 0 0 34px;
	width: 34px;
	height: 34px;
	padding: 9px 8px;
	border-radius: 9px;
	background: var(--rbtoc-primary-light);
}

.rbtoc-toggle-icon i {
	display: block;
	height: 2px;
	border-radius: 2px;
	background: var(--rbtoc-primary-dark);
}

.rbtoc-toggle-icon i:nth-child(2) {
	width: 78%;
}

.rbtoc-toggle-copy {
	display: grid;
	gap: 2px;
	min-width: 0;
	flex: 1;
}

.rbtoc-toggle-copy strong {
	color: var(--rbtoc-text);
	font-size: 15px;
	line-height: 1.35;
	font-weight: 800;
}

.rbtoc-toggle-copy small {
	color: var(--rbtoc-muted);
	font-size: 11px;
	line-height: 1.4;
	font-weight: 600;
}

.rbtoc-chevron {
	flex: 0 0 9px;
	width: 9px;
	height: 9px;
	margin-right: 3px;
	border-right: 2px solid var(--rbtoc-muted);
	border-bottom: 2px solid var(--rbtoc-muted);
	transform: rotate(45deg);
	transition: transform 0.2s ease;
}

.rbtoc.is-open .rbtoc-chevron {
	transform: translateY(3px) rotate(225deg);
}

.rbtoc-body {
	max-height: 0;
	opacity: 0;
	overflow: hidden;
	visibility: hidden;
	transition: max-height 0.26s ease, opacity 0.18s ease, visibility 0.18s ease;
}

.rbtoc.is-open .rbtoc-body {
	max-height: min(62vh, 620px);
	opacity: 1;
	visibility: visible;
}

.rbtoc-list {
	counter-reset: rbtoc-item;
	display: grid;
	gap: 2px;
	margin: 0;
	padding: 2px 10px 14px;
	list-style: none;
	overflow: auto;
	overscroll-behavior: contain;
	scrollbar-width: thin;
	scrollbar-color: rgba(0, 162, 255, 0.35) transparent;
}

.rbtoc-item {
	counter-increment: rbtoc-item;
	margin: 0;
	padding: 0;
}

.rbtoc-item a {
	display: grid;
	grid-template-columns: 24px minmax(0, 1fr);
	gap: 8px;
	align-items: start;
	padding: 8px 9px;
	border-radius: 8px;
	color: var(--rbtoc-muted);
	font-size: 13px;
	line-height: 1.45;
	font-weight: 600;
	text-decoration: none;
	transition: background 0.16s ease, color 0.16s ease;
}

.rbtoc-item a::before {
	content: counter(rbtoc-item, decimal-leading-zero);
	padding-top: 1px;
	color: var(--rbtoc-primary);
	font-size: 10px;
	font-weight: 800;
}

.rbtoc-item a:hover {
	background: var(--rbtoc-primary-light);
	color: var(--rbtoc-primary-dark);
	text-decoration: none;
}

.rbtoc-item a[aria-current="location"] {
	background: var(--rbtoc-primary-light);
	color: var(--rbtoc-primary-dark);
	box-shadow: inset 3px 0 0 var(--rbtoc-primary);
	font-weight: 800;
}

.rbtoc-level-h3 a {
	padding-left: 20px;
	font-size: 12px;
}

.rbtoc-level-h4 a {
	padding-left: 34px;
	font-size: 12px;
}

.entry-content [data-rbtoc-heading] {
	scroll-margin-top: 104px;
}

.rbtoc-sidebar {
	position: sticky;
	top: 92px;
	margin: 0;
	max-height: calc(100vh - 112px);
	border-left-width: 1px;
	border-radius: var(--radius-lg, 16px);
	z-index: 5;
}

.rbtoc-sidebar .rbtoc-body {
	overflow: hidden;
}

.rbtoc-sidebar.is-open .rbtoc-body {
	max-height: calc(100vh - 190px);
}

.rbtoc-sidebar .rbtoc-list {
	max-height: calc(100vh - 198px);
}

@media (min-width: 1025px) {
	body.rbtoc-has-sidebar-clone .entry-content > .rbtoc[data-rbtoc-primary] {
		display: none;
	}
}

@media (max-width: 1024px) {
	.rbtoc {
		margin: 0 0 22px;
	}

	.rbtoc-toggle {
		min-height: 62px;
		padding: 12px 14px;
	}

	.rbtoc.is-open .rbtoc-body {
		max-height: 55vh;
	}
}

@media (max-width: 640px) {
	.rbtoc {
		border-left-width: 3px;
		border-radius: 0 10px 10px 0;
	}

	.rbtoc-toggle-icon {
		flex-basis: 32px;
		width: 32px;
		height: 32px;
	}

	.rbtoc-item a {
		padding-top: 9px;
		padding-bottom: 9px;
	}
}

@media print {
	.rbtoc {
		display: none !important;
	}
}