/**
 * CivioTOC Frontend Styles - Mobile-First Approach
 *
 * @package CivioTOC
 */

/* ==========================================================================
   BASE STYLES (MOBILE FIRST - 0-767px)
   ========================================================================== */

/* Mobile: Desktop TOC is completely hidden, use mobile dropdown instead */
.civio-toc {
	display: none !important;
}

/* Mobile: Desktop toggle button hidden */
.civio-toc-toggle {
	display: none;
}

/* Mobile: Desktop chevron never shows */
.civio-toc__chevron {
	display: none;
}

/* Mobile: Desktop close button never shows */
.civio-toc__close {
	display: none;
}

/* Mobile Dropdown Toggle Button - Visible by default on mobile */
.civio-toc-mobile-toggle {
	display: flex;
	position: fixed;
	bottom: 24px;
	left: 50%;
	transform: translateX(-50%);
	min-width: 200px;
	max-width: 90%;
	height: 48px;
	background: var(--civio-toc-bg-color, #05060F);
	border: 2px solid var(--civio-toc-active-color, #18AFAD);
	border-radius: var(--cr-smallest-round, 40px);
	box-shadow: var(--bs-small-on-green, 0px 4px 16px 0px rgba(24, 175, 173, 0.40));
	cursor: pointer;
	z-index: 1000;
	transition: var(--tr-1, all 0.3s ease-in-out);
	padding: 0 20px;
	justify-content: space-between;
	align-items: center;
	color: #FFFFFF;
	font-family: var(--ff-body, 'Nunito', sans-serif);
	font-size: 0.9375rem;
	font-weight: 600;
	opacity: 0;
	pointer-events: none;
}

.civio-toc-mobile-toggle.is-visible {
	opacity: 1;
	pointer-events: auto;
}

.civio-toc-mobile-toggle__label {
	flex: 1;
	text-align: left;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}

.civio-toc-mobile-toggle__icon {
	color: var(--civio-toc-active-color, #18AFAD);
	width: 20px;
	height: 20px;
	flex-shrink: 0;
	transition: transform 0.3s ease-in-out;
	margin-left: 8px;
}

.civio-toc-mobile-toggle__icon path {
	stroke: currentColor;
}

.civio-toc-mobile-toggle.is-open .civio-toc-mobile-toggle__icon {
	transform: rotate(180deg);
}

.civio-toc-mobile-toggle:hover {
	box-shadow: 0px 6px 20px 0px rgba(24, 175, 173, 0.60);
}

.civio-toc-mobile-toggle:focus {
	outline: 2px solid var(--civio-toc-active-color, #18AFAD);
	outline-offset: 4px;
}

/* Mobile Dropdown Menu */
.civio-toc-mobile-dropdown {
	display: none;
	position: fixed;
	bottom: 80px;
	left: 50%;
	transform: translateX(-50%) translateY(20px) scale(0.95);
	width: 90%;
	max-width: 400px;
	max-height: 60vh;
	background: var(--civio-toc-bg-color, #05060F);
	border: 2px solid var(--civio-toc-active-color, #18AFAD);
	border-radius: var(--cr-medium, 20px);
	box-shadow: 0 8px 32px 0 rgba(5, 6, 15, 0.40);
	overflow-y: auto;
	overflow-x: hidden;
	z-index: 999;
	padding: var(--s-xsmall, 24px);
	opacity: 0;
	transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}

.civio-toc-mobile-dropdown.is-visible {
	display: block;
	opacity: 1;
	transform: translateX(-50%) translateY(0) scale(1);
}

.civio-toc-mobile-dropdown::-webkit-scrollbar {
	width: 6px;
}

.civio-toc-mobile-dropdown::-webkit-scrollbar-track {
	background: rgba(255, 255, 255, 0.08);
	border-radius: 3px;
}

.civio-toc-mobile-dropdown::-webkit-scrollbar-thumb {
	background: rgba(255, 255, 255, 0.24);
	border-radius: 3px;
}

/* Mobile Backdrop */
.civio-toc-backdrop {
	display: none;
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: transparent;
	z-index: 998;
}

.civio-toc-backdrop.is-visible {
	display: block;
}

/* ==========================================================================
   SHARED STYLES (Both Mobile and Desktop)
   ========================================================================== */

/* TOC Title */
.civio-toc__title {
	font-family: var(--ff-heading, 'Fredoka', sans-serif);
	font-size: 1.25rem;
	font-weight: 500;
	color: #FFFFFF;
	line-height: 1.4;
}

/* TOC Navigation */
.civio-toc__nav {
	display: block;
}

/* TOC Lists */
.civio-toc__list,
.civio-toc__sublist {
	margin: 0;
	padding: 0;
	list-style: none;
}

.civio-toc__list {
	border-left: 2px solid rgba(255, 255, 255, 0.08);
}

.civio-toc__sublist {
	margin-top: 8px;
	margin-left: 16px;
	border-left: 2px solid rgba(255, 255, 255, 0.08);
}

/* TOC Items */
.civio-toc__item {
	margin: 0;
	padding: 0;
	position: relative;
}

.civio-toc__item + .civio-toc__item {
	margin-top: 8px;
}

/* TOC Links */
.civio-toc__link {
	display: block;
	padding: 10px 16px;
	color: var(--civio-toc-text-color, rgba(255, 255, 255, 0.64));
	text-decoration: none;
	font-size: 0.9375rem;
	line-height: 1.5;
	transition: all 0.3s ease-in-out;
	position: relative;
	border-radius: 8px;
	margin-bottom: 4px;
	cursor: pointer;
	user-select: none;
}

.civio-toc__link:hover {
	color: rgba(255, 255, 255, 0.9);
	background: rgba(255, 255, 255, 0.08);
}

.civio-toc__link:focus {
	outline: 2px solid var(--civio-toc-active-color, #18AFAD);
	outline-offset: 2px;
}

/* Active link with contrasting background and inverse text */
.civio-toc__link.is-active {
	background: var(--civio-toc-active-color, #18AFAD);
	color: #FFFFFF;
	font-weight: 600;
	box-shadow: 0 2px 8px rgba(24, 175, 173, 0.3);
}

.civio-toc__link.is-active:hover {
	background: #1AC5C3;
	color: #FFFFFF;
}

/* Level-specific styles for nested items */
.civio-toc__item--level-3 .civio-toc__link {
	font-size: 0.875rem;
	padding-left: 12px;
}

.civio-toc__item--level-4 .civio-toc__link,
.civio-toc__item--level-5 .civio-toc__link,
.civio-toc__item--level-6 .civio-toc__link {
	font-size: 0.8125rem;
	padding-left: 12px;
	opacity: 0.9;
}

/* ==========================================================================
   DESKTOP/TABLET STYLES (768px and above)
   ========================================================================== */

@media (min-width: 768px) {
	/* Desktop: Show the fixed sidebar TOC */
	.civio-toc {
		display: flex !important;
		position: fixed;
		left: 0;
		top: 110%; /* Start hidden below viewport */
		transform: translateX(0) translateY(-50%);
		width: 280px;
		max-height: calc(100vh - 100px); /* CRITICAL: Constrain height for scrolling */
		background: var(--civio-toc-bg-color, #05060F);
		padding: 0;
		border-radius: 0 var(--cr-medium, 20px) var(--cr-medium, 20px) 0;
		overflow: hidden;
		z-index: 100;
		box-shadow: 0 8px 24px 0 rgba(5, 6, 15, 0.24);
		font-family: var(--ff-body, 'Nunito', sans-serif);
		transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out, top 0.5s ease-in-out, visibility 0s linear 0.5s;
		opacity: 0;
		visibility: hidden; /* Extra safeguard: completely hidden on initial load */
		pointer-events: none;
		flex-direction: column;
	}

	/* Visible state (after scrolling past hero) - slides up to center */
	.civio-toc.is-visible {
		top: 50%; /* Slide up to vertical center */
		opacity: 1;
		visibility: visible; /* Make visible */
		pointer-events: auto;
		transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out, top 0.5s ease-in-out, visibility 0s linear 0s; /* No delay when showing */
	}

	/* Collapsed state on desktop - uses transform for GPU acceleration */
	.civio-toc.is-collapsed {
		transform: translateX(-100%) translateY(-50%);
	}

	/* TOC Header (with title and close button) - Scrolls naturally with content */
	.civio-toc__header {
		background: var(--civio-toc-bg-color, #05060F);
		padding: var(--s-xsmall, 24px);
		padding-bottom: 16px;
		border-bottom: 1px solid rgba(255, 255, 255, 0.08);
		flex-shrink: 0;
		display: flex;
		align-items: center;
		justify-content: space-between;
	}

	/* TOC Title within header */
	.civio-toc__header .civio-toc__title {
		margin: 0;
		flex: 1;
		padding-right: 12px;
	}

	/* Desktop Close Button (inside header) */
	.civio-toc__close {
		display: flex;
		width: 32px;
		height: 32px;
		background: transparent;
		border: none;
		border-radius: 50%;
		cursor: pointer;
		align-items: center;
		justify-content: center;
		transition: var(--tr-1, all 0.3s ease-in-out);
		padding: 0;
		flex-shrink: 0;
	}

	.civio-toc__close:hover {
		background: rgba(255, 255, 255, 0.08);
		transform: scale(1.1);
	}

	.civio-toc__close:active {
		transform: scale(0.95);
	}

	.civio-toc__close-icon {
		color: rgba(255, 255, 255, 0.64);
		transition: color 0.3s ease-in-out;
	}

	.civio-toc__close:hover .civio-toc__close-icon {
		color: var(--civio-toc-active-color, #18AFAD);
	}

	/* TOC Content Area - CRITICAL: Must be scrollable independently */
	.civio-toc__content {
		flex: 1;
		overflow-y: auto;
		overflow-x: hidden;
		max-height: calc(100vh - 200px); /* CRITICAL: Allows independent scrolling */
		padding: var(--s-xsmall, 24px);
		padding-top: 12px;
	}

	/* Custom scrollbar for TOC content area */
	.civio-toc__content::-webkit-scrollbar {
		width: 6px;
	}

	.civio-toc__content::-webkit-scrollbar-track {
		background: rgba(255, 255, 255, 0.08);
		border-radius: 3px;
	}

	.civio-toc__content::-webkit-scrollbar-thumb {
		background: rgba(255, 255, 255, 0.24);
		border-radius: 3px;
	}

	.civio-toc__content::-webkit-scrollbar-thumb:hover {
		background: rgba(255, 255, 255, 0.48);
	}

	/* Desktop Chevron Indicator (right edge, vertically centered) */
	.civio-toc__chevron {
		display: flex;
		position: absolute;
		right: -16px;
		top: 50%;
		transform: translateY(-50%);
		width: 28px;
		height: 28px;
		background: var(--civio-toc-bg-color, #05060F);
		border-radius: 50%;
		align-items: center;
		justify-content: center;
		box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
		transition: all 0.3s ease-in-out;
		opacity: 0.8;
		cursor: default;
	}

	.civio-toc:hover .civio-toc__chevron {
		opacity: 1;
		transform: translateY(-50%) translateX(2px);
	}

	.civio-toc__chevron-icon {
		color: var(--civio-toc-active-color, #18AFAD);
		width: 14px;
		height: 14px;
	}

	.civio-toc__chevron-icon path {
		stroke: currentColor;
	}

	/* Hide chevron and close button when collapsed */
	.civio-toc.is-collapsed .civio-toc__chevron,
	.civio-toc.is-collapsed .civio-toc__close {
		display: none;
	}

	/* Desktop Toggle Button (for opening collapsed drawer) */
	.civio-toc-toggle {
		position: fixed;
		left: 0;
		top: 50%;
		transform: translateY(-50%);
		width: 40px;
		height: 80px;
		background: var(--civio-toc-bg-color, #05060F);
		border: none;
		border-radius: 0 var(--cr-smaller, 12px) var(--cr-smaller, 12px) 0;
		cursor: pointer;
		z-index: 99;
		transition: var(--tr-1, all 0.3s ease-in-out);
		padding: 0;
		display: flex;
		justify-content: center;
		align-items: center;
		box-shadow: 0 4px 12px 0 rgba(5, 6, 15, 0.16);
		opacity: 0;
		pointer-events: none;
	}

	/* Show toggle button ONLY when TOC is collapsed AND after scroll */
	.civio-toc.is-collapsed.is-visible ~ .civio-toc-toggle {
		opacity: 1;
		pointer-events: auto;
	}

	/* Hide toggle button when TOC is open (not collapsed) */
	.civio-toc:not(.is-collapsed) ~ .civio-toc-toggle {
		opacity: 0;
		pointer-events: none;
	}

	.civio-toc-toggle:hover {
		background: rgba(24, 175, 173, 0.16);
	}

	.civio-toc-toggle__icon {
		color: var(--civio-toc-active-color, #18AFAD);
		width: 20px;
		height: 20px;
		transition: transform 0.3s ease-in-out;
	}

	/* Icon rotates when TOC is collapsed (arrow points right) */
	.civio-toc.is-collapsed ~ .civio-toc-toggle .civio-toc-toggle__icon {
		transform: rotate(180deg);
	}

	/* Desktop: Hide mobile elements completely */
	.civio-toc-mobile-toggle,
	.civio-toc-mobile-dropdown,
	.civio-toc-backdrop {
		display: none !important;
	}
}

/* ==========================================================================
   LARGE DESKTOP ADJUSTMENTS (1440px and above)
   ========================================================================== */

@media (min-width: 1440px) {
	.civio-toc {
		width: 360px;
	}

	/* No need to adjust collapsed state - translateX(-100%) handles it automatically! */

	.civio-toc__header {
		padding: var(--s-xsmall, 24px);
		padding-bottom: 5px;
	}

	.civio-toc__content {
		padding: var(--s-medium, 32px);
		padding-top: 16px;
	}

	.civio-toc__title {
		font-size: 1.375rem;
	}

	.civio-toc__link {
		font-size: 1rem;
		padding: 12px 20px;
	}
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
	.civio-toc,
	.civio-toc-toggle,
	.civio-toc-mobile-toggle,
	.civio-toc-mobile-dropdown,
	.civio-toc-backdrop {
		display: none !important;
	}
}

/* ==========================================================================
   ACCESSIBILITY ENHANCEMENTS
   ========================================================================== */

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
	.civio-toc,
	.civio-toc__link,
	.civio-toc-toggle,
	.civio-toc-mobile-toggle,
	.civio-toc-backdrop {
		transition: none !important;
		animation: none !important;
	}
}

/* High contrast mode support */
@media (prefers-contrast: high) {
	.civio-toc {
		border: 2px solid currentColor;
	}

	.civio-toc__link {
		border-left-width: 3px;
	}

	.civio-toc__link.is-active {
		font-weight: 700;
	}
}

/* Focus visible for keyboard navigation */
.civio-toc__link:focus-visible {
	outline: 2px solid var(--civio-toc-active-color, #18AFAD);
	outline-offset: 4px;
}

.civio-toc-mobile-toggle:focus-visible {
	outline: 3px solid var(--civio-toc-active-color, #18AFAD);
	outline-offset: 4px;
}

.civio-toc-toggle:focus-visible {
	outline: 2px solid var(--civio-toc-active-color, #18AFAD);
	outline-offset: 4px;
}