.toc_navigation {
	position: sticky;
	top: 85px;
	z-index: 15;
	background-color: var(--theme-header-bg);
	border-bottom: 1px solid rgba(9, 88, 198, 0.1);
	padding: var(--spacing-md) 0;
	margin-bottom: var(--spacing-xl);
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
	border-radius: var(--theme-rounded-section);
	margin-top: var(--spacing-sm);
}

.toc_navigation nav {
	position: relative;
	overflow-x: auto;
	scrollbar-width: none;
	-ms-overflow-style: none;
	scroll-behavior: smooth;
}

.toc_navigation nav::-webkit-scrollbar {
	display: none;
}

.toc_navigation .min-title {
	font-size: 12px;
	font-weight: 600;
	color: var(--color-text-secondary);
	margin-bottom: var(--spacing-sm);
	text-transform: uppercase;
	letter-spacing: 0.5px;
	text-align: center;
	font-family: 'Open Sans', sans-serif;
}

.toc_navigation .items {
	display: flex;
	gap: 6px;
	list-style: none;
	margin: 0;
	padding: 0 var(--theme-block-padding);
	white-space: nowrap;
	align-items: center;
	min-height: 50px;
	justify-content: flex-start;
	overflow-x: auto;
	scroll-behavior: smooth;
	scrollbar-width: none;
	-ms-overflow-style: none;
}

.toc_navigation .items::-webkit-scrollbar {
	display: none;
}

.toc_navigation .item {
	flex-shrink: 0;
	transition: all 0.15s ease-in-out;
}

.toc_navigation .item a {
	display: flex;
	align-items: center;
	text-decoration: none;
	color: var(--theme-body-color);
	font-size: 14px;
	font-weight: 500;
	padding: 6px 14px;
	border-radius: var(--theme-rounded-button);
	background: transparent;
	border: 1px solid transparent;
	transition: all 0.15s ease-in-out;
	white-space: nowrap;
	position: relative;
	font-family: 'Open Sans', sans-serif;
	min-height: 38px;
}

.toc_navigation .item a:hover {
	color: var(--theme-color-style3);
	background-color: var(--theme-color-style4);
}

.toc_navigation .item a.is-active,
.toc_navigation .item.is-active a {
	color: var(--theme-buttons-accent-color);
	background-color: var(--theme-buttons-accent-bg);
	font-weight: 600;
}

.toc_navigation .item a.is-active:hover,
.toc_navigation .item.is-active a:hover {
	background-color: var(--theme-buttons-accent-bg-hover);
}

.toc_navigation .name {
	font-size: inherit;
	line-height: 1.2;
	font-family: inherit;
	display: block;
	overflow: hidden;
	text-overflow: ellipsis;
}

.progress-container {
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	height: 2px;
	background: rgba(9, 88, 198, 0.1);
	overflow: hidden;
	border-radius: 0 0 var(--theme-rounded-section) var(--theme-rounded-section);
}

.progress-bar {
	height: 100%;
	background: var(--theme-color-accent);
	width: 0%;
	transition: width 0.3s ease-in-out;
	border-radius: inherit;
}

/* Mobile Styles */
@media (max-width: 768px) {
	.toc_navigation {
		top: 85px;
		padding: var(--spacing-sm) 0;
		margin-bottom: var(--spacing-lg);
		border-radius: var(--theme-rounded-section);
		margin-left: var(--spacing-sm);
		margin-right: var(--spacing-sm);
	}

	.toc_navigation .min-title {
		font-size: 11px;
		margin-bottom: 8px;
	}

	.toc_navigation .items {
		gap: 4px;
		min-height: 44px;
		padding: 0 var(--spacing-md);
	}

	.toc_navigation .item a {
		font-size: 12px;
		padding: 5px 10px;
		min-height: 34px;
	}
}

@media (max-width: 480px) {
	.toc_navigation .items {
		gap: 3px;
		padding: 0 var(--spacing-sm);
	}

	.toc_navigation .item a {
		font-size: 11px;
		padding: 4px 8px;
		min-height: 32px;
	}

	.toc_navigation .min-title {
		font-size: 10px;
	}
}

/* Smooth scroll behavior */
html {
	scroll-behavior: smooth;
}

/* Focus styles for accessibility */
.toc_navigation .item a:focus {
	outline: 2px solid var(--theme-color-accent);
	outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
	.toc_navigation {
		border: 2px solid var(--theme-color-accent);
		background: var(--theme-header-bg);
	}

	.toc_navigation .item a {
		border: 1px solid var(--theme-color-accent);
	}

	.toc_navigation .item a.is-active {
		background: var(--theme-color-accent);
		color: var(--theme-body-bg);
	}
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {

	.toc_navigation .item,
	.toc_navigation .item a,
	.progress-bar {
		transition: none;
	}

	html {
		scroll-behavior: auto;
	}
}

/* Print styles */
@media print {
	.toc_navigation {
		position: static;
		background: white;
		border: 1px solid #000;
		box-shadow: none;
		page-break-inside: avoid;
	}

	.toc_navigation .item a {
		color: #000;
		background: white;
		border: 1px solid #000;
	}
}