Compact the journey rail to reclaim form width

Gutter shrinks from md:pl-20 (80px) to md:pl-12 (48px) — a 32px (40%) gain
back to the form column. Markers, pulse halo, and 'Now' pill scale down to
match so the rail still reads at a glance:

- Marker container: -left-14 w-12 -> -left-9 w-7
- Past/future markers: h-6 -> h-5
- Current marker: h-7 ring-4 -> h-6 ring-2; rank label 11px -> 10px
- 'Now' pill: 9px -> 8px; tracking and offset re-balanced for the shorter
  drop from the smaller marker bottom
- Rail-pulse keyframe shadow radius: 8px -> 6px to suit the smaller disc

app/globals.css

@@ -151,7 +151,7 @@ input[type="date"]::-webkit-calendar-picker-indicator {
     box-shadow: 0 0 0 0 oklch(72% 0.14 135 / 0.55);
   }
   60% {
-    box-shadow: 0 0 0 8px oklch(72% 0.14 135 / 0);
+    box-shadow: 0 0 0 6px oklch(72% 0.14 135 / 0);
   }
 }