Add design system, audit sections, apply global classes

Design system (design/):
- bcw-css-variables.json: color, spacing (--space-xs→2xl), typography (--h1→h6, --text-sm→xl)
- bcw-color-palette.json: named swatches referencing CSS variables
- bcw-global-classes.json: section-container, section-header, col-3, col-4, features-container, footer-sub-section
- design.md: full variable reference and usage guide

Templates:
- features-3col + features-4col: add global_classes embed + _cssGlobalClasses references
- All headers + footers: apply var(--color-primary) background to section elements
- footer-columns: add footer-sub-section class to column containers
- Remove content-image-left (duplicate of content-image-right with children reversed)
- testimonials: gap tweak 12px → 15px on card containers

Repo hygiene:
- Add .gitignore (Updated_Sections/)
- Clear Updated_Sections staging folder

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

design/bcw-css-variables.json

@@ -0,0 +1,198 @@
+{
+  "categories": [
+    {
+      "id": "bcwcol",
+      "name": "Colors"
+    },
+    {
+      "id": "bcwspc",
+      "name": "Spacing"
+    },
+    {
+      "id": "bcwtyp",
+      "name": "Typography"
+    }
+  ],
+  "variables": [
+    {
+      "id": "bcwv01",
+      "name": "color-primary",
+      "value": "#374151",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv02",
+      "name": "color-primary-light",
+      "value": "#9CA3AF",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv03",
+      "name": "color-primary-dark",
+      "value": "#1F2937",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv04",
+      "name": "color-secondary",
+      "value": "#6B7280",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv05",
+      "name": "color-secondary-light",
+      "value": "#D1D5DB",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv06",
+      "name": "color-secondary-dark",
+      "value": "#4B5563",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv07",
+      "name": "color-tertiary",
+      "value": "#F3F4F6",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv08",
+      "name": "color-tertiary-light",
+      "value": "#FFFFFF",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv09",
+      "name": "color-tertiary-dark",
+      "value": "#E5E7EB",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv10",
+      "name": "color-text",
+      "value": "#374151",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv11",
+      "name": "color-heading",
+      "value": "#111827",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv12",
+      "name": "color-bg",
+      "value": "#FFFFFF",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv13",
+      "name": "color-bg-alt",
+      "value": "#F9FAFB",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv14",
+      "name": "color-white",
+      "value": "#FFFFFF",
+      "category": "bcwcol"
+    },
+    {
+      "id": "bcwv15",
+      "name": "space-xs",
+      "value": "8px",
+      "category": "bcwspc"
+    },
+    {
+      "id": "bcwv16",
+      "name": "space-sm",
+      "value": "16px",
+      "category": "bcwspc"
+    },
+    {
+      "id": "bcwv17",
+      "name": "space-md",
+      "value": "24px",
+      "category": "bcwspc"
+    },
+    {
+      "id": "bcwv18",
+      "name": "space-lg",
+      "value": "40px",
+      "category": "bcwspc"
+    },
+    {
+      "id": "bcwv19",
+      "name": "space-xl",
+      "value": "64px",
+      "category": "bcwspc"
+    },
+    {
+      "id": "bcwv20",
+      "name": "space-2xl",
+      "value": "96px",
+      "category": "bcwspc"
+    },
+    {
+      "id": "bcwv21",
+      "name": "h1",
+      "value": "3rem",
+      "category": "bcwtyp"
+    },
+    {
+      "id": "bcwv22",
+      "name": "h2",
+      "value": "2.25rem",
+      "category": "bcwtyp"
+    },
+    {
+      "id": "bcwv23",
+      "name": "h3",
+      "value": "1.75rem",
+      "category": "bcwtyp"
+    },
+    {
+      "id": "bcwv24",
+      "name": "h4",
+      "value": "1.25rem",
+      "category": "bcwtyp"
+    },
+    {
+      "id": "bcwv25",
+      "name": "h5",
+      "value": "1.125rem",
+      "category": "bcwtyp"
+    },
+    {
+      "id": "bcwv26",
+      "name": "h6",
+      "value": "1rem",
+      "category": "bcwtyp"
+    },
+    {
+      "id": "bcwv27",
+      "name": "text-sm",
+      "value": "0.875rem",
+      "category": "bcwtyp"
+    },
+    {
+      "id": "bcwv28",
+      "name": "text-base",
+      "value": "1rem",
+      "category": "bcwtyp"
+    },
+    {
+      "id": "bcwv29",
+      "name": "text-lg",
+      "value": "1.125rem",
+      "category": "bcwtyp"
+    },
+    {
+      "id": "bcwv30",
+      "name": "text-xl",
+      "value": "1.25rem",
+      "category": "bcwtyp"
+    }
+  ]
+}