/* Spacing + layout rails. 4px base, matching Tradatomy's --tt-space scale. */
:root{
--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;
--gap-panel:16px;--pad-panel:14px 16px;--pad-panel-head:12px 16px;--pad-row:7px 12px;--pad-page:20px;
--rail-sidebar:216px;--rail-context:320px;--h-topbar:50px;--w-drawer:420px;--w-drawer-wide:520px;--w-content-max:1160px;
}
html[data-density="compact"]{--pad-row:4px 12px;--pad-panel:10px 12px;--gap-panel:10px;--pad-page:12px}
html[data-density="comfy"]{--pad-row:11px 14px;--pad-panel:18px 20px;--gap-panel:22px}