.iop-page {
	--iop-accent: #d40000;
	--iop-accent-soft: rgba(136, 0, 0, 0.14);
	--iop-highlight: rgba(136, 0, 0, 0.12);
	--iop-danger: #d82f24;
}

.iop-page * {
	box-sizing: border-box;
}

.iop-hero {
	margin: 0 0 1rem;
}

.iop-eyebrow,
.iop-page-label {
	margin: 0;
	font:
		600 0.8rem/1.1 Tahoma,
		sans-serif;
	letter-spacing: 0.18em;
	text-transform: uppercase;
	color: #6e0000;
}

.iop-hero h1 {
	margin: 0.15rem 0 0.55rem;
	font:
		700 clamp(2rem, 5vw, 3.5rem) / 1.02 Times,
		serif;
	color: #800;
	text-transform: uppercase;
}

.iop-intro,
.iop-statusbar p,
.iop-page-meta,
.iop-preview-overlay p {
	margin: 0;
	line-height: 1.55;
}

.iop-intro {
	max-width: 72ch;
}

.iop-shortcuts {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	margin-top: 0.8rem;
}

.iop-shortcuts span {
	padding: 0.35rem 0.65rem;
	border: 1px solid #cda9a9;
	border-radius: 4px;
	background: #fffaf9;
	color: #333;
	font:
		500 0.88rem/1.2 Tahoma,
		sans-serif;
}

.iop-page kbd {
	display: inline-block;
	min-width: 2.1em;
	padding: 0.18em 0.45em;
	border: 1px solid #800;
	border-bottom-width: 2px;
	border-radius: 3px;
	background: #fff;
	color: #6e0000;
	font:
		600 0.88em/1 Tahoma,
		sans-serif;
	text-align: center;
}

.iop-book {
	position: relative;
	display: grid;
	grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
	gap: 0;
	border: 1px solid #800;
	border-radius: 4px;
	overflow: hidden;
	box-shadow: 3px 3px 5px #555;
	background: #cda9a9;
}

.iop-book::before {
	content: "";
	position: absolute;
	inset: 0;
	left: calc(50% - 2px);
	width: 4px;
	background: #800;
	pointer-events: none;
	z-index: 1;
}

.iop-preview-page,
.iop-code-page {
	position: relative;
	display: grid;
	grid-template-rows: auto minmax(0, 1fr);
	min-height: 78vh;
	padding: 1rem;
}

.iop-preview-page {
	background: linear-gradient(180deg, #e8f0f4 0%, #c9dde6 100%);
	color: #17303b;
}

.iop-code-page {
	background: #fff;
	color: #333;
}

.iop-page-header {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	justify-content: space-between;
	gap: 0.6rem 1rem;
	margin-bottom: 0.9rem;
}

.iop-page-label {
	color: #800;
}

.iop-page-meta {
	color: #555;
	font-size: 0.88rem;
}

.iop-preview-page .iop-page-meta {
	color: rgba(22, 53, 67, 0.8);
}

.iop-preview-stage,
.iop-editor-shell {
	min-height: 0;
	border: 1px solid #800;
	border-radius: 4px;
	overflow: hidden;
	box-shadow: 3px 3px 5px #555;
}

.iop-preview-stage {
	position: relative;
	background: linear-gradient(180deg, #d4e8f0, #a8c4cf);
}

#iop-scene {
	display: block;
	width: 100%;
	height: 100%;
	min-height: 68vh;
}

.iop-preview-overlay {
	position: absolute;
	left: 0.5rem;
	right: 0.5rem;
	bottom: 0.5rem;
	padding: 0.5rem 0.7rem;
	border: 1px solid #cda9a9;
	border-radius: 4px;
	background: rgba(255, 255, 255, 0.85);
}

.iop-editor-shell {
	background: #fffaf9;
}

.iop-editor,
.iop-editor-loading {
	min-height: 68vh;
}

.iop-editor-loading {
	display: grid;
	place-items: center;
	color: #555;
	font:
		500 1rem/1.4 Tahoma,
		sans-serif;
}

.iop-editor-loading[hidden] {
	display: none;
}

.iop-editor {
	position: relative;
}

.iop-widget {
	position: absolute;
	z-index: 20;
	padding: 0.5rem 0.6rem;
	border: 1px solid #cda9a9;
	border-radius: 4px;
	background: #fffaf9;
	box-shadow: 3px 3px 5px #555;
}

.iop-slider-widget {
	width: min(17rem, calc(100% - 2rem));
}

.iop-slider-widget input {
	width: 100%;
	accent-color: #800;
}

.iop-statusbar {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem 1rem;
	justify-content: space-between;
	margin: 0.6rem 0 0;
	padding: 0.25rem 0;
	color: #555;
	font-size: 0.88rem;
}

#iop-error {
	color: #d82f24;
}

.iop-page.is-inspecting .iop-preview-stage,
.iop-page.is-inspecting .iop-editor-shell {
	cursor:
		url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 32 32'%3E%3Ccircle cx='13' cy='13' r='8' fill='%23ffe0e0' stroke='%23880000' stroke-width='2'/%3E%3Cline x1='19' y1='19' x2='29' y2='29' stroke='%23880000' stroke-width='4' stroke-linecap='round'/%3E%3Cline x1='13' y1='8' x2='13' y2='18' stroke='%23880000' stroke-width='1.5'/%3E%3Cline x1='8' y1='13' x2='18' y2='13' stroke='%23880000' stroke-width='1.5'/%3E%3C/svg%3E")
			12 12,
		zoom-in;
}

.scene-shape {
	transition:
		fill 120ms ease,
		stroke 120ms ease,
		opacity 120ms ease,
		filter 120ms ease;
}

.scene-shape.is-linked {
	filter: drop-shadow(0 0 0.55rem rgba(136, 0, 0, 0.45));
}

.scene-shape.is-inspected {
	fill: rgba(136, 0, 0, 0.82) !important;
	stroke: rgba(136, 0, 0, 0.92) !important;
	opacity: 0.96 !important;
	filter: drop-shadow(0 0 0.8rem rgba(136, 0, 0, 0.65));
}

.scene-shape.is-inspected[data-kind="polyline"] {
	fill: none !important;
	stroke-width: 6 !important;
}

.iop-code-line-decoration {
	background: linear-gradient(90deg, rgba(136, 0, 0, 0.12), rgba(136, 0, 0, 0.04)) !important;
	border-radius: 3px;
}

.iop-code-glyph-decoration {
	background: linear-gradient(180deg, #d40000, #800);
	border-radius: 999px;
	margin-left: 5px;
	width: 10px !important;
}

.iop-code-token-decoration {
	background: rgba(136, 0, 0, 0.1);
	border-bottom: 2px solid rgba(136, 0, 0, 0.5);
	border-radius: 2px;
}

@media (max-width: 980px) {
	.iop-book {
		grid-template-columns: 1fr;
	}

	.iop-book::before {
		display: none;
	}

	.iop-preview-page,
	.iop-code-page {
		min-height: auto;
	}

	.iop-preview-page {
		border-bottom: 1px solid #800;
	}

	#iop-scene,
	.iop-editor,
	.iop-editor-loading {
		min-height: 52vh;
	}
}