diff --git a/data/calibration-evidence.json b/data/calibration-evidence.json
index fe51488c..fc21e74b 100644
--- a/data/calibration-evidence.json
+++ b/data/calibration-evidence.json
@@ -1 +1,443 @@
-[]
+[
+  {
+    "ruleId": "missing-component",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-4333-9262",
+    "timestamp": "2026-03-26T00:23:55.813Z"
+  },
+  {
+    "ruleId": "no-auto-layout",
+    "type": "underscored",
+    "actualDifficulty": "hard",
+    "fixture": "material3-52949-27916",
+    "timestamp": "2026-03-26T00:47:29.368Z"
+  },
+  {
+    "ruleId": "magic-number-spacing",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-52949-27916",
+    "timestamp": "2026-03-26T00:47:29.368Z"
+  },
+  {
+    "ruleId": "raw-font",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-52949-27916",
+    "timestamp": "2026-03-26T00:47:29.368Z"
+  },
+  {
+    "ruleId": "missing-component",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-52949-27916",
+    "timestamp": "2026-03-26T00:47:29.368Z"
+  },
+  {
+    "ruleId": "variant-structure-mismatch",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-52949-27916",
+    "timestamp": "2026-03-26T00:47:29.368Z"
+  },
+  {
+    "ruleId": "no-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-562-9518",
+    "timestamp": "2026-03-26T00:50:06.823Z"
+  },
+  {
+    "ruleId": "missing-component",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-562-9518",
+    "timestamp": "2026-03-26T00:50:06.823Z"
+  },
+  {
+    "ruleId": "detached-instance",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-562-9518",
+    "timestamp": "2026-03-26T00:50:06.823Z"
+  },
+  {
+    "ruleId": "text-truncation-unhandled",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-562-9518",
+    "timestamp": "2026-03-26T00:50:06.823Z"
+  },
+  {
+    "ruleId": "wrap-behavior-unknown",
+    "type": "underscored",
+    "actualDifficulty": "moderate",
+    "fixture": "simple-ds-562-9518",
+    "timestamp": "2026-03-26T00:50:06.823Z"
+  },
+  {
+    "ruleId": "no-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-9106",
+    "timestamp": "2026-03-26T00:58:41.395Z"
+  },
+  {
+    "ruleId": "missing-component",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-9106",
+    "timestamp": "2026-03-26T00:58:41.395Z"
+  },
+  {
+    "ruleId": "detached-instance",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-9106",
+    "timestamp": "2026-03-26T00:58:41.395Z"
+  },
+  {
+    "ruleId": "text-truncation-unhandled",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-9106",
+    "timestamp": "2026-03-26T00:58:41.395Z"
+  },
+  {
+    "ruleId": "no-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "moderate",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "absolute-position-in-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "fixed-size-in-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "missing-size-constraint",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "missing-responsive-behavior",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "deep-nesting",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "raw-font",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "magic-number-spacing",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "missing-component",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "detached-instance",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "variant-structure-mismatch",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "text-truncation-unhandled",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "overflow-behavior-unknown",
+    "type": "underscored",
+    "actualDifficulty": "moderate",
+    "fixture": "material3-56615-82356",
+    "timestamp": "2026-03-26T01:03:19.643Z"
+  },
+  {
+    "ruleId": "no-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "absolute-position-in-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "moderate",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "fixed-size-in-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "missing-size-constraint",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "missing-responsive-behavior",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "group-usage",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "deep-nesting",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "z-index-dependent-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "raw-font",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "magic-number-spacing",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "missing-component",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "detached-instance",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "variant-structure-mismatch",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "text-truncation-unhandled",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-51954-18254",
+    "timestamp": "2026-03-26T01:06:26.978Z"
+  },
+  {
+    "ruleId": "missing-size-constraint",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-8591",
+    "timestamp": "2026-03-26T01:07:12.089Z"
+  },
+  {
+    "ruleId": "detached-instance",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-8591",
+    "timestamp": "2026-03-26T01:07:12.089Z"
+  },
+  {
+    "ruleId": "missing-component",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-8591",
+    "timestamp": "2026-03-26T01:07:12.089Z"
+  },
+  {
+    "ruleId": "fixed-size-in-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-8591",
+    "timestamp": "2026-03-26T01:07:12.089Z"
+  },
+  {
+    "ruleId": "no-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-8591",
+    "timestamp": "2026-03-26T01:07:12.089Z"
+  },
+  {
+    "ruleId": "deep-nesting",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-8591",
+    "timestamp": "2026-03-26T01:07:12.089Z"
+  },
+  {
+    "ruleId": "no-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "moderate",
+    "fixture": "material3-56615-45927",
+    "timestamp": "2026-03-26T01:10:42.533Z"
+  },
+  {
+    "ruleId": "missing-responsive-behavior",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-45927",
+    "timestamp": "2026-03-26T01:10:42.533Z"
+  },
+  {
+    "ruleId": "group-usage",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-45927",
+    "timestamp": "2026-03-26T01:10:42.533Z"
+  },
+  {
+    "ruleId": "z-index-dependent-layout",
+    "type": "underscored",
+    "actualDifficulty": "hard",
+    "fixture": "material3-56615-45927",
+    "timestamp": "2026-03-26T01:10:42.533Z"
+  },
+  {
+    "ruleId": "missing-size-constraint",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-45927",
+    "timestamp": "2026-03-26T01:10:42.533Z"
+  },
+  {
+    "ruleId": "missing-component",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-45927",
+    "timestamp": "2026-03-26T01:10:42.533Z"
+  },
+  {
+    "ruleId": "deep-nesting",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-45927",
+    "timestamp": "2026-03-26T01:10:42.533Z"
+  },
+  {
+    "ruleId": "detached-instance",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-45927",
+    "timestamp": "2026-03-26T01:10:42.533Z"
+  },
+  {
+    "ruleId": "fixed-size-in-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-45927",
+    "timestamp": "2026-03-26T01:10:42.533Z"
+  },
+  {
+    "ruleId": "raw-font",
+    "type": "overscored",
+    "actualDifficulty": "moderate",
+    "fixture": "material3-56615-45927",
+    "timestamp": "2026-03-26T01:10:42.533Z"
+  },
+  {
+    "ruleId": "text-truncation-unhandled",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "material3-56615-45927",
+    "timestamp": "2026-03-26T01:10:42.533Z"
+  },
+  {
+    "ruleId": "no-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-7790",
+    "timestamp": "2026-03-26T01:11:14.093Z"
+  },
+  {
+    "ruleId": "missing-component",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-7790",
+    "timestamp": "2026-03-26T01:11:14.093Z"
+  },
+  {
+    "ruleId": "detached-instance",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-7790",
+    "timestamp": "2026-03-26T01:11:14.093Z"
+  },
+  {
+    "ruleId": "fixed-size-in-auto-layout",
+    "type": "overscored",
+    "actualDifficulty": "easy",
+    "fixture": "simple-ds-175-7790",
+    "timestamp": "2026-03-26T01:11:14.093Z"
+  }
+]
diff --git a/data/discovery-evidence.json b/data/discovery-evidence.json
index 9edb0dc6..47d912e8 100644
--- a/data/discovery-evidence.json
+++ b/data/discovery-evidence.json
@@ -1,4 +1,26 @@
 {
   "schemaVersion": 1,
-  "entries": []
+  "entries": [
+    {
+      "description": "The design tree marks image frames with 'background-image: [IMAGE]' but provides no actual image data. The Figma screenshot shows gray placeholders with a small image icon. Reproducing the exact placeholder appearance (including the centered image-not-loaded icon) required guesswork. This is inherent to static fixture-based conversion without asset access.",
+      "category": "unknown",
+      "fixture": "simple-ds-175-7790",
+      "timestamp": "2026-03-26T01:11:14.093Z",
+      "source": "evaluation"
+    },
+    {
+      "description": "Inter font rendering between Figma and the browser produces subtle anti-aliasing differences. Text baselines and glyph shapes differ slightly, contributing to ~1% of the pixel mismatch. This is an environment limitation, not a design structure issue.",
+      "category": "unknown",
+      "fixture": "simple-ds-175-7790",
+      "timestamp": "2026-03-26T01:11:14.093Z",
+      "source": "evaluation"
+    },
+    {
+      "description": "Without explicit root/section height constraints in the design tree, the total page height required setting explicit heights on the header (99px), main content (870px), and footer (468px) to match the Figma layout exactly. The design tree provides dimensions in the node declarations but doesn't enforce them as CSS constraints, requiring manual height pinning.",
+      "category": "unknown",
+      "fixture": "simple-ds-175-7790",
+      "timestamp": "2026-03-26T01:11:14.093Z",
+      "source": "evaluation"
+    }
+  ]
 }
diff --git a/src/core/rules/rule-config.ts b/src/core/rules/rule-config.ts
index d05eacbf..a60aaa27 100644
--- a/src/core/rules/rule-config.ts
+++ b/src/core/rules/rule-config.ts
@@ -10,29 +10,29 @@ export const RULE_CONFIGS: Record<RuleId, RuleConfig> = {
   // ============================================
   "no-auto-layout": {
     severity: "blocking",
-    score: -7,
+    score: -10,
     depthWeight: 1.5,
     enabled: true,
   },
   "absolute-position-in-auto-layout": {
     severity: "blocking",
-    score: -10,
+    score: -7,
     depthWeight: 1.3,
     enabled: true,
   },
   "fixed-size-in-auto-layout": {
     severity: "risk",
-    score: -5,
+    score: -3,
     enabled: true,
   },
   "missing-size-constraint": {
     severity: "risk",
-    score: -5,
+    score: -3,
     enabled: true,
   },
   "missing-responsive-behavior": {
     severity: "risk",
-    score: -4,
+    score: -3,
     depthWeight: 1.5,
     enabled: true,
   },
@@ -74,8 +74,8 @@ export const RULE_CONFIGS: Record<RuleId, RuleConfig> = {
     enabled: true,
   },
   "raw-font": {
-    severity: "blocking",
-    score: -8,
+    severity: "risk",
+    score: -4,
     enabled: true,
   },
   "inconsistent-spacing": {
@@ -88,7 +88,7 @@ export const RULE_CONFIGS: Record<RuleId, RuleConfig> = {
   },
   "magic-number-spacing": {
     severity: "risk",
-    score: -4,
+    score: -3,
     enabled: true,
     options: {
       gridBase: 4,