.tree-grid {
	display: grid;
	grid-template-columns: 1.5fr 1fr;
}
#vizCanvas { height: 600px; cursor: crosshair; }
.doc-panel {
	padding: var(--space-4);
	border-left: 1px solid var(--border);
	display: flex;
	flex-direction: column;
	min-height: 600px;
}
.doc-content { transition: opacity 0.3s ease; flex-grow: 1; }
.doc-content.swap { opacity: 0; }
.doc-content h3 {
	font-size: 22px;
	line-height: 28px;
	font-weight: 600;
	letter-spacing: -0.01em;
	margin-bottom: var(--space-2);
}
.doc-content .text-block {
	font-size: 15px;
	line-height: 24px;
	color: var(--text-secondary);
	margin-bottom: var(--space-3);
}
.tier-chip {
	display: inline-block;
	font-family: var(--font-mono);
	font-size: 12px;
	line-height: 16px;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--text);
	border: 1px solid var(--border-strong);
	border-radius: 6px;
	padding: 4px 8px;
	margin-bottom: var(--space-2);
}
.claim-box {
	font-size: 14px;
	line-height: 22px;
	color: var(--text-secondary);
	background: #000;
	border: 1px solid var(--border);
	border-left: 3px solid var(--accent);
	border-radius: 0 8px 8px 0;
	padding: var(--space-2);
	margin-top: var(--space-3);
}
.claim-box .claim-label {
	display: block;
	font-family: var(--font-mono);
	font-size: 11px;
	line-height: 16px;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--accent);
	margin-bottom: 4px;
}
.doc-footer {
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: var(--space-2);
	padding-top: var(--space-3);
	margin-top: var(--space-3);
	border-top: 1px solid var(--border);
}
.year-display {
	font-size: 28px;
	line-height: 34px;
	font-weight: 700;
	letter-spacing: -0.015em;
	color: var(--surface-raised);
	transition: color 0.5s ease;
}
.year-display.active { color: var(--text); }
.progress-line {
	height: 2px;
	background: var(--border);
	position: relative;
}
.progress-line > div {
	position: absolute;
	top: 0; left: 0; bottom: 0;
	width: 0%;
	background: var(--text);
}
.arch-card .meta {
	display: flex;
	justify-content: space-between;
	gap: var(--space-2);
	font-family: var(--font-mono);
	font-size: 13px;
	line-height: 18px;
	color: var(--text-secondary);
	margin-top: var(--space-2);
}
@media (max-width: 900px) {
	.tree-grid { grid-template-columns: 1fr; }
	#vizCanvas { height: 420px; }
	.doc-panel { border-left: none; border-top: 1px solid var(--border); min-height: 0; }
}
@media (prefers-reduced-motion: reduce) {
	.doc-content { transition: none; }
}