style: switch accent from Gruvbox blue to Gruvbox yellow; fix Tended layout

- Replace accent palette (#076678 blue → #b57614 yellow light,
  #83a598 green → #fabd2f yellow dark) across config, critical CSS,
  pagefind overrides, and all hardcoded hex references
- Stack post meta rows (Planted / Tended) vertically via flex-col

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

tailwind.config.js

@@ -30,19 +30,19 @@ export default {
           900: "#282828",
           950: "#1d2021",
         },
-        // Gruvbox blue — links, interactive, CTAs, focus rings
+        // Gruvbox yellow — links, interactive, CTAs, focus rings
         accent: {
-          50: "#e8f4f6",
-          100: "#c8dfe4",
-          200: "#97c5cf",
-          300: "#6aabb9",
-          400: "#458588",
-          500: "#076678",
-          600: "#065a6b",
-          700: "#054d5c",
-          800: "#04404d",
-          900: "#03333e",
-          950: "#022730",
+          50: "#fdf8e1",
+          100: "#faefc0",
+          200: "#f5db7a",
+          300: "#efc843",
+          400: "#d79921",
+          500: "#b57614",
+          600: "#926208",
+          700: "#7a5207",
+          800: "#634306",
+          900: "#4d3505",
+          950: "#3a2804",
         },
       },
       fontFamily: {