/**
 * Adrian Accessibility Tools
 *
 * Part 1: the widget (floating button + slide-out panel).
 * Part 2: the accessibility tools, activated by classes on <html>.
 */

/* =====================================================================
 * Part 1 - Widget
 * ===================================================================== */

.adrian-a11y {
	--adrian-a11y-color: #0b57d0;
	--adrian-a11y-on-color: #ffffff;
	--adrian-a11y-accent: #0b57d0; /* theme colour, or a dark fallback when it is too light for the white panel */
	--adrian-a11y-surface: #ffffff;
	--adrian-a11y-surface-alt: #f3f5f9;
	--adrian-a11y-ink: #1b1f24;
	--adrian-a11y-muted: #5b6573;
	--adrian-a11y-border: #dde2ea;
	--adrian-a11y-radius: 14px;
	--adrian-a11y-gap: 24px;
	--adrian-a11y-width: 360px;
	--adrian-a11y-speed: 0.35s;
}

.adrian-a11y *,
.adrian-a11y *::before,
.adrian-a11y *::after {
	box-sizing: border-box;
}

.adrian-a11y button {
	margin: 0;
	font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
	cursor: pointer;
	-webkit-tap-highlight-color: transparent;
}

.adrian-a11y svg {
	display: block;
	flex: 0 0 auto;
}

.adrian-a11y__sr-only {
	position: absolute !important;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

/* ---------- Floating toggle button ---------- */

.adrian-a11y__toggle {
	position: fixed;
	bottom: var(--adrian-a11y-gap);
	z-index: 100000;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 60px;
	height: 60px;
	padding: 0;
	border: 3px solid var(--adrian-a11y-on-color);
	border-radius: 50%;
	background: var(--adrian-a11y-color);
	color: var(--adrian-a11y-on-color);
	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.28);
	transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.adrian-a11y--right .adrian-a11y__toggle {
	right: var(--adrian-a11y-gap);
}

.adrian-a11y--left .adrian-a11y__toggle {
	left: var(--adrian-a11y-gap);
}

.adrian-a11y__toggle:hover {
	transform: scale(1.08);
	box-shadow: 0 10px 26px rgba(0, 0, 0, 0.32);
}

.adrian-a11y__toggle:focus-visible,
.adrian-a11y__panel button:focus-visible {
	outline: 3px solid var(--adrian-a11y-accent);
	outline-offset: 3px;
	box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.9);
}

/* ---------- Slide-out panel ---------- */

.adrian-a11y__panel {
	position: fixed;
	top: 0;
	bottom: 0;
	z-index: 100001;
	display: flex;
	flex-direction: column;
	width: var(--adrian-a11y-width);
	max-width: 100vw;
	background: var(--adrian-a11y-surface);
	color: var(--adrian-a11y-ink);
	font: 15px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
	text-align: left;
	box-shadow: 0 0 40px rgba(0, 0, 0, 0.3);
	visibility: hidden;
	transition:
		transform var(--adrian-a11y-speed) cubic-bezier(0.22, 1, 0.36, 1),
		visibility 0s linear var(--adrian-a11y-speed);
}

.adrian-a11y--right .adrian-a11y__panel {
	right: 0;
	transform: translateX(105%);
}

.adrian-a11y--left .adrian-a11y__panel {
	left: 0;
	transform: translateX(-105%);
}

.adrian-a11y__panel.is-open {
	visibility: visible;
	transform: translateX(0);
	transition:
		transform var(--adrian-a11y-speed) cubic-bezier(0.22, 1, 0.36, 1),
		visibility 0s linear 0s;
}

.adrian-a11y__header {
	display: flex;
	align-items: center;
	gap: 12px;
	padding: 18px 18px 18px 20px;
	background: var(--adrian-a11y-color);
	color: var(--adrian-a11y-on-color);
}

.adrian-a11y__header-symbol svg {
	width: 30px;
	height: 30px;
}

.adrian-a11y__title {
	flex: 1 1 auto;
	margin: 0;
	padding: 0;
	color: inherit;
	font: 700 19px/1.2 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
	letter-spacing: 0;
	text-transform: none;
}

.adrian-a11y__close {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 40px;
	height: 40px;
	padding: 0;
	border: 0;
	border-radius: 50%;
	background: rgba(255, 255, 255, 0.18);
	color: inherit;
	transition: background 0.2s ease;
}

.adrian-a11y__close:hover {
	background: rgba(255, 255, 255, 0.32);
}

.adrian-a11y__body {
	flex: 1 1 auto;
	padding: 18px;
	overflow-y: auto;
	overscroll-behavior: contain;
}

/* Text size stepper */

.adrian-a11y__textsize {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	margin-bottom: 14px;
	padding: 12px 14px;
	border: 1px solid var(--adrian-a11y-border);
	border-radius: var(--adrian-a11y-radius);
	background: var(--adrian-a11y-surface-alt);
}

.adrian-a11y__textsize-label {
	font-weight: 600;
}

.adrian-a11y__textsize-controls {
	display: flex;
	align-items: center;
	gap: 8px;
}

.adrian-a11y__textsize-value {
	min-width: 3.4em;
	font-weight: 700;
	font-variant-numeric: tabular-nums;
	text-align: center;
}

.adrian-a11y__step {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 42px;
	height: 42px;
	padding: 0;
	border: 2px solid var(--adrian-a11y-accent);
	border-radius: 10px;
	background: var(--adrian-a11y-surface);
	color: var(--adrian-a11y-accent);
	transition: background 0.2s ease, color 0.2s ease;
}

.adrian-a11y__step:hover:not(:disabled) {
	background: var(--adrian-a11y-color);
	color: var(--adrian-a11y-on-color);
}

.adrian-a11y__step:disabled {
	opacity: 0.4;
	cursor: not-allowed;
}

/* Tool tiles */

.adrian-a11y__grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 10px;
	margin: 0;
	padding: 0;
	list-style: none;
}

.adrian-a11y__grid li {
	margin: 0;
	padding: 0;
}

.adrian-a11y__grid li::before {
	content: none;
}

.adrian-a11y__tool {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 8px;
	width: 100%;
	min-height: 96px;
	padding: 14px 10px;
	border: 2px solid var(--adrian-a11y-border);
	border-radius: var(--adrian-a11y-radius);
	background: var(--adrian-a11y-surface-alt);
	color: var(--adrian-a11y-ink);
	font-size: 14px;
	font-weight: 600;
	line-height: 1.25;
	text-align: center;
	transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.adrian-a11y__tool svg {
	width: 28px;
	height: 28px;
	color: var(--adrian-a11y-accent);
}

.adrian-a11y__tool:hover {
	border-color: var(--adrian-a11y-accent);
}

.adrian-a11y__tool:active {
	transform: scale(0.97);
}

.adrian-a11y__tool[aria-pressed="true"] {
	border-color: var(--adrian-a11y-accent);
	background: var(--adrian-a11y-color);
	color: var(--adrian-a11y-on-color);
}

.adrian-a11y__tool[aria-pressed="true"] svg {
	color: inherit;
}

/* Footer / reset */

.adrian-a11y__footer {
	padding: 14px 18px 18px;
	border-top: 1px solid var(--adrian-a11y-border);
}

.adrian-a11y__reset {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	width: 100%;
	padding: 12px 16px;
	border: 2px solid var(--adrian-a11y-accent);
	border-radius: 999px;
	background: transparent;
	color: var(--adrian-a11y-accent);
	font-size: 15px;
	font-weight: 700;
	transition: background 0.2s ease, color 0.2s ease;
}

.adrian-a11y__reset:hover {
	background: var(--adrian-a11y-color);
	color: var(--adrian-a11y-on-color);
}

.adrian-a11y__reset svg {
	width: 20px;
	height: 20px;
}

@media (max-width: 480px) {
	.adrian-a11y {
		--adrian-a11y-gap: 14px;
		--adrian-a11y-width: 100vw;
	}

	.adrian-a11y__toggle {
		width: 52px;
		height: 52px;
	}
}

@media (prefers-reduced-motion: reduce) {
	.adrian-a11y__toggle,
	.adrian-a11y__panel,
	.adrian-a11y__panel.is-open,
	.adrian-a11y__tool {
		transition: none;
	}
}

/* =====================================================================
 * Part 2 - Accessibility tools (classes are set on <html>)
 * ===================================================================== */

/* ---------- Invert colours + Monochrome (combinable filters) ----------
 * A filter on the root element does not break position: fixed children. */

html.adrian-invert {
	--adrian-filter-invert: invert(1) hue-rotate(180deg);
	background-color: #ffffff;
}

html.adrian-monochrome {
	--adrian-filter-gray: grayscale(1);
}

html.adrian-invert,
html.adrian-monochrome {
	filter: var(--adrian-filter-invert, ) var(--adrian-filter-gray, );
}

/* Invert media and the widget back, so photos and the panel look normal. */
html.adrian-invert img,
html.adrian-invert video,
html.adrian-invert .adrian-a11y__toggle,
html.adrian-invert .adrian-a11y__panel {
	filter: invert(1) hue-rotate(180deg);
}

/* ---------- Dark contrast ---------- */

html.adrian-dark-contrast body,
html.adrian-dark-contrast body :not(.adrian-a11y, .adrian-a11y *) {
	background-color: #000000 !important;
	color: #ffffff !important;
	border-color: #ffffff !important;
	text-shadow: none !important;
	box-shadow: none !important;
}

html.adrian-dark-contrast body :is(a, a *):not(.adrian-a11y *) {
	color: #ffff00 !important;
}

html.adrian-dark-contrast body :is(h1, h2, h3, h4, h5, h6):not(.adrian-a11y *) {
	color: #00ffff !important;
}

/* ---------- Light contrast ---------- */

html.adrian-light-contrast body,
html.adrian-light-contrast body :not(.adrian-a11y, .adrian-a11y *) {
	background-color: #ffffff !important;
	color: #000000 !important;
	border-color: #000000 !important;
	text-shadow: none !important;
	box-shadow: none !important;
}

html.adrian-light-contrast body :is(a, a *):not(.adrian-a11y *) {
	color: #0000cc !important;
}

/* ---------- Highlight links ---------- */

html.adrian-highlight-links body a:not(.adrian-a11y *) {
	text-decoration: underline !important;
	text-decoration-thickness: 2px !important;
	text-underline-offset: 3px !important;
	outline: 2px solid #ff9800 !important;
	outline-offset: 2px;
	background-color: #ffeb3b !important;
	color: #000000 !important;
}

html.adrian-highlight-links body a:not(.adrian-a11y *) * {
	color: #000000 !important;
}

/* ---------- Highlight headings ---------- */

html.adrian-highlight-headings body :is(h1, h2, h3, h4, h5, h6):not(.adrian-a11y *) {
	outline: 3px dashed #ff9800 !important;
	outline-offset: 4px;
	background-color: rgba(255, 235, 59, 0.3) !important;
}

/* ---------- Readable font (dyslexia friendly) ----------
 * Uses fonts already installed on most systems; icon fonts and code are left alone. */

html.adrian-readable-font body,
html.adrian-readable-font body :not(.adrian-a11y, .adrian-a11y *, [class*="icon"], [class*="fa-"], .fa, code, pre, kbd, samp) {
	font-family: "Atkinson Hyperlegible", "OpenDyslexic", Verdana, Tahoma, "Trebuchet MS", Arial, sans-serif !important;
	letter-spacing: 0.03em !important;
	word-spacing: 0.12em !important;
}

html.adrian-readable-font body :is(p, li, dd, td, blockquote):not(.adrian-a11y *) {
	line-height: 1.7 !important;
}

/* Text size is handled by accessibility.js (it scales every element's computed size). */