/**
 * Atlas Lattice — content-graph hero stylesheet.
 *
 * 3-layer SVG depth (back/mid/front), graph-paper background, quadratic
 * bezier edges, vignette overlay, side panel (desktop) → bottom drawer
 * (mobile <768px).
 *
 * Reuses .mcg-page tokens (graph.css §0). Local --mcg-lattice-* aliases
 * keep specificity scoped without redefining global tokens.
 *
 * Naming: BEM `.mcg-lattice__*`. No hardcoded colors — all via tokens.
 *
 * @package magon-content-graph
 */

.mcg-lattice {
	/* Category palette — 7 slots, jewel-toned for the literary register. */
	--kind-1: #8B7355;  /* Архив — sepia */
	--kind-2: #5B7FA6;  /* Хроника — ink blue */
	--kind-3: #7A5C8A;  /* Литература — plum */
	--kind-4: #4A7C6F;  /* Путешествия — pine */
	--kind-5: #C4704A;  /* Память — terracotta */
	--kind-6: #6E8C4A;  /* Фотоблог — moss */
	--kind-7: #A06060;  /* Дневник — rosewood */

	--mcg-lattice-bg:           var(--mcg-bg-secondary, #F4F1EC);
	/* Graph paper deeply backgrounded — visible only as a hint, not a feature */
	--mcg-lattice-grid:         color-mix(in srgb, var(--mcg-text-muted, #7A7A8A) 5%, transparent);
	--mcg-lattice-grid-strong:  color-mix(in srgb, var(--mcg-text-muted, #7A7A8A) 11%, transparent);
	--mcg-lattice-edge-color:   color-mix(in srgb, var(--mcg-text-muted, #7A7A8A) 36%, transparent);
	--mcg-lattice-edge-active:  var(--mcg-accent, #2B6CB0);

	/* Single-column: filters → legend → stage (full width) → panel (below) */
	display: grid;
	grid-template-columns: 1fr;
	grid-template-rows: auto auto auto auto;
	gap: var(--mcg-s4, 16px);
	font-family: var(--mcg-font-sans, 'PT Sans', sans-serif);
	margin: var(--mcg-s8, 32px) 0;
	position: relative;
	user-select: none;
	-webkit-user-select: none;
}

/* Dark-mode palette refinement */
@media (prefers-color-scheme: dark) {
	.mcg-page:not([data-theme="light"]) .mcg-lattice {
		--kind-1: #B89977;
		--kind-2: #7DA8D5;
		--kind-3: #B088CB;
		--kind-4: #6FB39A;
		--kind-5: #E29675;
		--kind-6: #9CBE6E;
		--kind-7: #D08B8B;
	}
}
.mcg-page[data-theme="dark"] .mcg-lattice {
	--kind-1: #B89977;
	--kind-2: #7DA8D5;
	--kind-3: #B088CB;
	--kind-4: #6FB39A;
	--kind-5: #E29675;
	--kind-6: #9CBE6E;
	--kind-7: #D08B8B;
}

/* ── FILTER ROW ── */
.mcg-lattice__filters {
	grid-column: 1 / -1;
	display: flex; flex-wrap: wrap; gap: var(--mcg-s2, 8px);
	align-items: center;
	padding: var(--mcg-s4, 16px) var(--mcg-s5, 20px);
	background: var(--mcg-bg-primary, #FAFAF7);
	border: 1px solid var(--mcg-border, #E2DED8);
	border-radius: var(--mcg-s2, 8px);
}
.mcg-lattice__filters-label {
	font: 700 11px/1 var(--mcg-font-sans, sans-serif);
	color: var(--mcg-text-muted, #7A7A8A);
	text-transform: uppercase;
	letter-spacing: 0.12em;
	margin-right: var(--mcg-s3, 12px);
}
.mcg-lattice__chip {
	min-height: 36px; min-width: 44px;
	padding: var(--mcg-s2, 8px) var(--mcg-s4, 16px);
	border: 1px solid var(--mcg-border-strong, #C8C2BA);
	border-radius: 999px;
	background: transparent;
	color: var(--mcg-text-secondary, #4A4A5A);
	font: 14px/1.2 var(--mcg-font-sans, sans-serif);
	cursor: pointer;
	display: inline-flex; align-items: center; gap: var(--mcg-s2, 8px);
	transition: background 0.18s, color 0.18s, border-color 0.18s, transform 0.12s;
}
.mcg-lattice__chip-dot {
	width: 8px; height: 8px; border-radius: 50%;
	display: inline-block; flex: none;
	background: var(--chip-color, var(--mcg-text-muted));
	box-shadow: 0 0 0 1px color-mix(in srgb, var(--chip-color, var(--mcg-text-muted)) 50%, transparent);
}
.mcg-lattice__chip:hover { border-color: var(--mcg-accent); color: var(--mcg-accent); }
.mcg-lattice__chip:active { transform: scale(0.96); }
.mcg-lattice__chip[aria-pressed="true"] {
	background: var(--mcg-accent);
	color: var(--mcg-bg-primary);
	border-color: var(--mcg-accent);
}
.mcg-lattice__chip[aria-pressed="true"] .mcg-lattice__chip-dot {
	box-shadow: 0 0 0 1px var(--mcg-bg-primary);
}
.mcg-lattice__chip:focus-visible { outline: 2px solid var(--mcg-accent); outline-offset: 2px; }
.mcg-lattice__chip--reset {
	margin-left: auto;
	color: var(--mcg-text-muted);
	font-size: 13px;
	font-style: italic;
}

/* ── LEGEND (counter) ── */
.mcg-lattice__legend {
	grid-column: 1; grid-row: 2;
	display: flex; flex-wrap: wrap; gap: var(--mcg-s4, 16px);
	padding: var(--mcg-s2, 8px) var(--mcg-s4, 16px);
	font: 12px/1.4 var(--mcg-font-sans, sans-serif);
	color: var(--mcg-text-muted, #7A7A8A);
}
.mcg-lattice__legend-counter {
	margin-left: auto;
	font-style: italic;
	color: color-mix(in srgb, var(--mcg-text-muted) 90%, transparent);
}

/* ── STAGE: open drafting field — no hard rectangle, fades to background at edges ── */
.mcg-lattice__stage {
	position: relative;
	grid-column: 1; grid-row: 3;
	overflow: hidden;
	min-height: 720px;
	background-color: var(--mcg-lattice-bg);
	background-image:
		linear-gradient(var(--mcg-lattice-grid) 1px, transparent 1px),
		linear-gradient(90deg, var(--mcg-lattice-grid) 1px, transparent 1px),
		linear-gradient(var(--mcg-lattice-grid-strong) 1px, transparent 1px),
		linear-gradient(90deg, var(--mcg-lattice-grid-strong) 1px, transparent 1px);
	background-size: 24px 24px, 24px 24px, 120px 120px, 120px 120px;
	background-position: 0 0, 0 0, 0 0, 0 0;
	/* No border, no inset shadow. Soft radial fade at edges via mask kills the
	   "rectangle" feel — graph paper continues but blends into the page. */
	-webkit-mask-image: radial-gradient(ellipse at 50% 50%, #000 60%, transparent 100%);
	        mask-image: radial-gradient(ellipse at 50% 50%, #000 60%, transparent 100%);
	border-radius: var(--mcg-s4, 16px);
}

.mcg-lattice__canvas {
	width: 100%; height: 100%; min-height: 720px;
	display: block;
	cursor: grab;
	user-select: none;
	-webkit-user-select: none;
}
.mcg-lattice__canvas:active { cursor: grabbing; }
.mcg-lattice__canvas * { user-select: none; -webkit-user-select: none; }

.mcg-lattice__layer {
	transition: transform 80ms linear;
	transform-origin: 600px 350px;
	will-change: transform;
}
.mcg-lattice__layer--back { filter: blur(0.8px); }

/* Stats badge */
.mcg-lattice__stats {
	position: absolute; left: var(--mcg-s4, 16px); bottom: var(--mcg-s4, 16px);
	font: italic 12px/1.4 var(--mcg-font-serif, serif);
	color: color-mix(in srgb, var(--mcg-text-muted) 90%, transparent);
	pointer-events: none;
	background: color-mix(in srgb, var(--mcg-bg-primary) 55%, transparent);
	padding: 4px 10px; border-radius: 4px;
	backdrop-filter: blur(2px);
	letter-spacing: 0.02em;
}

/* Drag hint (one-time fade) */
.mcg-lattice__hint {
	position: absolute; right: var(--mcg-s4, 16px); top: var(--mcg-s4, 16px);
	font: 12px/1.4 var(--mcg-font-sans, sans-serif);
	color: var(--mcg-text-muted);
	background: color-mix(in srgb, var(--mcg-bg-primary) 80%, transparent);
	border: 1px solid var(--mcg-border);
	padding: 6px 10px; border-radius: 4px;
	pointer-events: none;
	opacity: 0;
	animation: mcg-lattice-hint-fade 5s 0.6s ease-out forwards;
}
@keyframes mcg-lattice-hint-fade {
	0%   { opacity: 0; transform: translateY(-4px); }
	10%  { opacity: 1; transform: translateY(0); }
	80%  { opacity: 1; }
	100% { opacity: 0; }
}

/* ── EDGES ── */
.mcg-lattice__edge {
	fill: none;
	stroke: var(--mcg-lattice-edge-color);
	stroke-width: 1.4;
	stroke-linecap: round;
	pointer-events: none;
	transition: stroke 0.22s, stroke-width 0.22s, opacity 0.22s;
}
.mcg-lattice__edge.is-active {
	stroke: var(--mcg-lattice-edge-active);
	stroke-width: 2.4;
	opacity: 1;
}
.mcg-lattice__edge.is-dimmed { opacity: 0.18; }
.mcg-lattice__edge.is-hidden { opacity: 0; }

/* ── NODES ── */
.mcg-lattice__node {
	cursor: pointer;
	fill: var(--node-color, var(--mcg-accent));
	stroke: var(--mcg-bg-primary);
	stroke-width: 2.5;
	transform-origin: center;
	transition: r 0.22s cubic-bezier(0.34, 1.56, 0.64, 1),
	            opacity 0.24s,
	            filter 0.22s,
	            transform 0.22s;
}
.mcg-lattice__node:hover,
.mcg-lattice__node:focus-visible {
	filter: drop-shadow(0 0 8px var(--node-color, var(--mcg-accent)));
	outline: none;
}
.mcg-lattice__node.is-selected {
	filter: url(#mcg-halo) drop-shadow(0 0 12px var(--node-color, var(--mcg-accent)));
	stroke-width: 3.5;
}
.mcg-lattice__node.is-muted {
	opacity: 0.11;
	transform: scale(0.92);
}

/* Front layer only — gentle idle pulse (fade only, no Y-translate so DOM positions stay deterministic) */
.mcg-lattice__layer--front .mcg-lattice__node:not(.is-muted):not(.is-selected) {
	animation: mcg-lattice-node-pulse 4.5s ease-in-out infinite;
}
@keyframes mcg-lattice-node-pulse {
	0%, 100% { opacity: 1; }
	50%      { opacity: 0.88; }
}

/* Click ripple */
.mcg-lattice__ripple {
	fill: none;
	pointer-events: none;
	animation: mcg-lattice-ripple 580ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.mcg-lattice__ripple--2 { animation-delay: 80ms; }
.mcg-lattice__ripple--3 { animation-delay: 160ms; }
@keyframes mcg-lattice-ripple {
	0%   { r: 4;  stroke-opacity: 0.7; stroke-width: 2; }
	100% { r: 36; stroke-opacity: 0;   stroke-width: 1; }
}

/* Labels above hovered/selected nodes */
.mcg-lattice__label {
	font: 600 12px/1 var(--mcg-font-sans, sans-serif);
	fill: var(--mcg-text-primary);
	pointer-events: none;
	text-anchor: middle;
	paint-order: stroke;
	stroke: var(--mcg-bg-secondary);
	stroke-width: 5;
	opacity: 0;
	transform: translateY(6px) scale(0.82);
	transform-origin: center;
	transform-box: fill-box;
	transition: opacity 0.18s, transform 0.18s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.mcg-lattice__label.is-visible { opacity: 1; transform: translateY(0) scale(1); }

.mcg-lattice__vignette { pointer-events: none; }

/* ── PANEL (now BELOW the stage, full column width) ── */
.mcg-lattice__panel {
	grid-column: 1; grid-row: 4;
	background: var(--mcg-bg-primary);
	padding: var(--mcg-s4, 16px) var(--mcg-s5, 20px);
	border-radius: var(--mcg-s2, 8px);
	border: 1px solid var(--mcg-border);
	display: flex; flex-direction: column;
	transition: border-color 0.24s, box-shadow 0.24s, padding 0.22s;
	user-select: text;
	-webkit-user-select: text;
}
.mcg-lattice__panel.is-open {
	border-color: var(--mcg-accent);
	box-shadow: 0 4px 18px color-mix(in srgb, var(--mcg-accent) 14%, transparent);
	padding: var(--mcg-s5, 20px) var(--mcg-s6, 24px);
}
.mcg-lattice__panel-empty {
	margin: 0; padding: 0;
	color: var(--mcg-text-muted);
	font: italic 14px/1.5 var(--mcg-font-serif, serif);
	display: flex; align-items: center; gap: var(--mcg-s3, 12px);
}
.mcg-lattice__panel-empty-icon {
	flex: none;
	color: var(--mcg-border-strong);
	opacity: 0.85;
	width: 22px !important; height: 22px !important;
}
.mcg-lattice__panel.is-open .mcg-lattice__panel-empty { display: none; }

.mcg-lattice__panel-content {
	display: none;
	animation: mcg-lattice-panel-fade 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}
.mcg-lattice__panel.is-open .mcg-lattice__panel-content {
	display: flex; flex-direction: column; flex: 1;
}
@keyframes mcg-lattice-panel-fade {
	from { opacity: 0; transform: translateY(8px); }
	to   { opacity: 1; transform: translateY(0); }
}
.mcg-lattice__panel-eyebrow {
	font: 700 10px/1.4 var(--mcg-font-sans, sans-serif);
	letter-spacing: 0.14em; text-transform: uppercase;
	color: var(--mcg-accent);
	margin: 0 0 var(--mcg-s2, 8px);
	display: flex; align-items: center; gap: var(--mcg-s2, 8px);
}
.mcg-lattice__panel-eyebrow-dot {
	width: 8px; height: 8px; border-radius: 50%;
	background: var(--chip-color, var(--mcg-accent));
}
.mcg-lattice__panel-title {
	font: 700 22px/1.25 var(--mcg-font-serif, serif);
	margin: 0 0 var(--mcg-s3, 12px);
	color: var(--mcg-text-primary);
	hyphens: auto;
}
.mcg-lattice__panel-body {
	font: 15px/1.55 var(--mcg-font-serif, serif);
	color: var(--mcg-text-secondary);
	margin: 0 0 var(--mcg-s4, 16px);
	font-style: italic;
}
.mcg-lattice__panel-tags {
	display: flex; flex-wrap: wrap; gap: var(--mcg-s1, 4px);
	margin: 0 0 var(--mcg-s4, 16px);
}
.mcg-lattice__tag {
	padding: 2px 10px;
	border: 1px solid var(--mcg-border);
	border-radius: 999px;
	font: 11px/1.4 var(--mcg-font-sans, sans-serif);
	color: var(--mcg-text-muted);
	background: var(--mcg-bg-secondary);
	text-transform: lowercase;
	letter-spacing: 0.02em;
}
.mcg-lattice__panel-section-label {
	font: 700 10px/1 var(--mcg-font-sans, sans-serif);
	text-transform: uppercase; letter-spacing: 0.12em;
	color: var(--mcg-text-muted);
	margin: var(--mcg-s2, 8px) 0;
}
.mcg-lattice__panel-links {
	display: flex; flex-direction: column; gap: var(--mcg-s2, 8px);
	margin: 0 0 var(--mcg-s4, 16px);
}
.mcg-lattice__related {
	padding: var(--mcg-s3, 12px) var(--mcg-s4, 16px);
	border-left: 3px solid var(--chip-color, var(--mcg-accent));
	text-decoration: none;
	color: var(--mcg-text-primary);
	background: var(--mcg-bg-secondary);
	border-radius: 0 var(--mcg-s1, 4px) var(--mcg-s1, 4px) 0;
	transition: background 0.18s, transform 0.12s;
}
.mcg-lattice__related:hover {
	background: var(--mcg-accent-light);
	transform: translateX(2px);
}
.mcg-lattice__related-meta {
	display: block;
	font: 10px/1.4 var(--mcg-font-sans, sans-serif);
	color: var(--mcg-text-muted);
	margin-bottom: 2px;
	text-transform: uppercase;
	letter-spacing: 0.08em;
}
.mcg-lattice__related-title {
	display: block;
	font: 14px/1.4 var(--mcg-font-serif, serif);
}
.mcg-lattice__panel-open {
	margin-top: auto;
	padding: var(--mcg-s3, 12px) var(--mcg-s4, 16px);
	background: var(--mcg-accent);
	color: #fff;
	text-decoration: none;
	text-align: center;
	border-radius: var(--mcg-s1, 4px);
	font: 700 14px/1.1 var(--mcg-font-sans, sans-serif);
	letter-spacing: 0.04em;
	transition: background 0.18s, transform 0.12s;
}
.mcg-lattice__panel-open:hover,
.mcg-lattice__panel-open:focus,
.mcg-lattice__panel-open:visited {
	background: var(--mcg-accent-hover);
	color: #fff;
	transform: translateY(-1px);
}
.mcg-lattice__panel-loading,
.mcg-lattice__panel-error {
	margin: auto;
	color: var(--mcg-text-muted);
	font: italic 14px/1.5 var(--mcg-font-serif, serif);
}

/* ── A11Y LIST (visually hidden on desktop, inline on mobile) ── */
.mcg-lattice__a11y {
	position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden;
}

/* Drawer handle (visible only on mobile) */
.mcg-lattice__panel-handle { display: none; }

/* Backdrop dim */
.mcg-lattice__backdrop {
	display: none;
	position: fixed; inset: 0;
	background: color-mix(in srgb, #000 35%, transparent);
	backdrop-filter: blur(2px);
	z-index: 49;
	opacity: 0;
	transition: opacity 0.24s;
}

/* ── MOBILE <768px ── */
@media (max-width: 767px) {
	.mcg-lattice__filters {
		flex-wrap: nowrap;
		overflow-x: auto;
		padding-bottom: var(--mcg-s2, 8px);
	}
	.mcg-lattice__chip { flex-shrink: 0; }
	.mcg-lattice__chip--reset { margin-left: 0; }
	.mcg-lattice__legend { display: none; }
	/* v0.7.2 — at 375px the SVG was collapsing to ~200px because the inner
	   canvas inherits the parent aspect-ratio. Force minimum useful height
	   so the lattice remains a recognisable visualisation, not a strip. */
	.mcg-lattice__stage  { min-height: 480px; height: 480px; }
	.mcg-lattice__canvas { min-height: 480px; height: 480px; touch-action: pan-y; }
	.mcg-lattice__panel {
		min-height: 0;
		position: fixed; bottom: 0; left: 0; right: 0;
		transform: translateY(100%);
		border-radius: var(--mcg-s4, 16px) var(--mcg-s4, 16px) 0 0;
		box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.18);
		max-height: 78vh;
		overflow-y: auto;
		z-index: 50;
		transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1);
		padding-top: var(--mcg-s3, 12px);
	}
	.mcg-lattice__panel-handle {
		display: block;
		width: 40px; height: 4px;
		background: var(--mcg-border-strong);
		border-radius: 2px;
		margin: 0 auto var(--mcg-s3, 12px);
	}
	.mcg-lattice__panel.is-open { transform: translateY(0); }
	.mcg-lattice__panel:not(.is-open) .mcg-lattice__panel-empty { display: none; }
	.mcg-lattice__a11y {
		position: static; width: auto; height: auto; left: auto;
		margin-top: var(--mcg-s4, 16px);
		list-style: none; padding: 0;
	}
	.mcg-lattice__a11y li {
		padding: var(--mcg-s2, 8px) 0;
		border-top: 1px solid var(--mcg-border);
	}
	.mcg-lattice__a11y a {
		color: var(--mcg-text-primary);
		text-decoration: none;
		font: 14px/1.45 var(--mcg-font-serif, serif);
	}
	.mcg-lattice__hint { display: none; }
	.mcg-lattice__backdrop.is-visible { display: block; opacity: 1; }
}

/* ── REDUCED MOTION ── */
@media (prefers-reduced-motion: reduce) {
	.mcg-lattice__node,
	.mcg-lattice__edge,
	.mcg-lattice__layer,
	.mcg-lattice__panel,
	.mcg-lattice__panel-content,
	.mcg-lattice__label,
	.mcg-lattice__hint {
		animation: none !important;
		transition: none !important;
	}
	.mcg-lattice__hint { display: none; }
}

/* ── ERROR STATE ── */
.mcg-lattice.is-error .mcg-lattice__stage,
.mcg-lattice.is-error .mcg-lattice__panel,
.mcg-lattice.is-error .mcg-lattice__a11y {
	display: none;
}
.mcg-lattice.is-error::before {
	content: '';
	display: none;
}