/* Shared chrome for µCSS Demos (index + demo pages). */

:root {
	color-scheme: dark;
	--demo-bg: #0b0f18;
	--demo-bg-panel: #121826;
	--demo-border: #2a3548;
	--demo-text: #e8eef8;
	--demo-muted: #9aa8bc;
	--demo-accent: #6eb6ff;
	--demo-canvas: radial-gradient(circle at 35% 25%, #1a2744 0%, #0b0f18 55%, #050608 100%);
	font-family: system-ui, sans-serif;
	line-height: 1.5;
}

* {
	box-sizing: border-box;
}

body.demo-page {
	margin: 0;
	min-height: 100vh;
	background: var(--demo-bg);
	color: var(--demo-text);
}

body.demo-index {
	margin: 0;
	min-height: 100vh;
	background: var(--demo-canvas);
	color: var(--demo-text);
}

.demo-index main {
	max-width: 42rem;
	margin: 0 auto;
	padding: 2rem 1.25rem 3rem;
}

.demo-index h1 {
	margin: 0 0 0.75rem;
	font-size: 1.6rem;
	font-weight: 600;
}

.demo-index ul {
	padding-left: 1.25rem;
}

.demo-index a {
	color: var(--demo-accent);
}

.demo-index .meta {
	color: var(--demo-muted);
	font-size: 0.95rem;
}

.demo-shell {
	display: grid;
	grid-template-columns: minmax(16rem, 22rem) 1fr;
	min-height: 100vh;
}

@media (max-width: 820px) {
	.demo-shell {
		grid-template-columns: 1fr;
		grid-template-rows: auto 1fr;
	}
}

.demo-panel {
	background: var(--demo-bg-panel);
	border-right: 1px solid var(--demo-border);
	padding: 1.25rem 1.25rem 1.5rem;
	overflow: auto;
}

.demo-back {
	margin: 0 0 0.75rem;
	font-size: 0.9rem;
}

.demo-back a {
	color: var(--demo-accent);
	text-decoration: none;
}

.demo-panel h1 {
	margin: 0 0 0.75rem;
	font-size: 1.35rem;
	font-weight: 600;
}

.demo-panel p {
	margin: 0 0 0.75rem;
	color: var(--demo-muted);
	font-size: 0.95rem;
}

.demo-sources {
	margin-top: 1rem;
	padding-top: 1rem;
	border-top: 1px solid var(--demo-border);
}

.demo-sources h2 {
	margin: 0 0 0.65rem;
	font-size: 0.8rem;
	font-weight: 600;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: var(--demo-muted);
}

.demo-sources figure {
	margin: 0 0 0.85rem;
}

.demo-sources img {
	display: block;
	max-width: 100%;
	height: auto;
	border: 1px solid var(--demo-border);
	border-radius: 4px;
	background: #050608;
	image-rendering: pixelated;
}

.demo-sources img[data-zoom] {
	cursor: zoom-in;
}

.demo-sources img[data-zoom]:hover {
	border-color: var(--demo-accent);
}

body.demo-lightbox-open {
	overflow: hidden;
}

.demo-lightbox {
	position: fixed;
	inset: 0;
	z-index: 1000;
	display: grid;
	place-items: center;
	padding: 1.5rem;
	background: rgb(5 8 12 / 0.92);
	backdrop-filter: blur(4px);
}

.demo-lightbox[hidden] {
	display: none;
}

.demo-lightbox__close {
	position: absolute;
	top: 0.75rem;
	right: 0.75rem;
	width: 2.5rem;
	height: 2.5rem;
	border: 1px solid var(--demo-border);
	border-radius: 4px;
	background: var(--demo-bg-panel);
	color: var(--demo-text);
	font-size: 1.5rem;
	line-height: 1;
	cursor: pointer;
}

.demo-lightbox__close:hover {
	border-color: var(--demo-accent);
	color: var(--demo-accent);
}

.demo-lightbox__figure {
	margin: 0;
	max-width: 95vw;
	max-height: 90vh;
	overflow: auto;
	text-align: center;
}

.demo-lightbox__img {
	display: block;
	margin: 0 auto;
	max-width: 95vw;
	max-height: calc(90vh - 3rem);
	width: auto;
	height: auto;
	border: 1px solid var(--demo-border);
	border-radius: 4px;
	background: #050608;
	image-rendering: pixelated;
}

.demo-lightbox__caption {
	margin-top: 0.65rem;
	font-size: 0.85rem;
	color: var(--demo-muted);
}

.demo-sources figcaption {
	margin-top: 0.35rem;
	font-size: 0.8rem;
	color: var(--demo-muted);
}

.demo-hint {
	font-size: 0.85rem !important;
	color: var(--demo-muted) !important;
}

.demo-theme-switch {
	display: flex;
	gap: 0.5rem;
	margin: 0.75rem 0 0.25rem;
}

.demo-theme-btn {
	padding: 0.35rem 0.85rem;
	border: 1px solid var(--demo-border);
	border-radius: 4px;
	background: var(--demo-bg);
	color: var(--demo-text);
	font: inherit;
	cursor: pointer;
}

.demo-theme-btn:hover {
	border-color: var(--demo-accent);
}

.demo-theme-btn[aria-pressed="true"] {
	border-color: var(--demo-accent);
	background: rgb(110 182 255 / 0.12);
	color: var(--demo-accent);
}

.demo-canvas {
	position: relative;
	min-height: 60vh;
	background: var(--demo-canvas);
	cursor: crosshair;
	outline: none;
}

.demo-canvas.is-idle::after {
	content: "Click here to start";
	position: absolute;
	inset: 0;
	display: grid;
	place-items: center;
	padding: 1rem;
	text-align: center;
	color: var(--demo-muted);
	font-size: 0.95rem;
	pointer-events: none;
}

.demo-page--flyex .demo-canvas.is-idle::after {
	content: "Click here for audio · Space releases flies";
}

.demo-page--buttons .demo-canvas {
	cursor: default;
	display: grid;
	place-items: center;
}