Fix pattern content inset drift with shared token and guardrail

scripts/check_pattern_inset_guardrails.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+CSS_FILE="$ROOT_DIR/styleguide.css"
+
+selectors=(
+  "sg-portal-header"
+  "sg-options-row"
+  "sg-card-list-page-drawer__header"
+  "sg-card-list-page-drawer__content"
+)
+
+for selector in "${selectors[@]}"; do
+  block="$(awk -v selector=".$selector" '
+    $0 ~ selector"[[:space:]]*\\{" {in_block=1}
+    in_block {print}
+    in_block && /}/ {exit}
+  ' "$CSS_FILE")"
+
+  if [[ -z "$block" ]]; then
+    echo "ERROR: selector .$selector not found in styleguide.css"
+    exit 1
+  fi
+
+  if echo "$block" | rg -n "(padding|padding-inline|padding-left|padding-right|inset|inset-inline)([^\n;]*)([0-9]+px)" >/dev/null; then
+    echo "ERROR: hardcoded px inset/padding value found in .$selector"
+    echo "$block"
+    exit 1
+  fi
+done
+
+echo "OK: no hardcoded px inset values in guarded pattern selectors"