diff --git a/src/features/tech-log/presentation/styles/globals.css b/src/features/tech-log/presentation/styles/globals.css
index a86a5a1..aa1885a 100644
--- a/src/features/tech-log/presentation/styles/globals.css
+++ b/src/features/tech-log/presentation/styles/globals.css
@@ -795,14 +795,14 @@ a {
 }
 
 .code-block {
-  width: min(58rem, calc(100% + 12rem));
-  margin: 38px 0 39px 50%;
+  width: min(var(--body-copy), 100%);
+  margin: 38px auto 39px;
   overflow: hidden;
   border: 1px solid #242831;
   border-radius: 8px;
   background: var(--code-canvas);
   color: #e8ebf2;
-  transform: translateX(-50%);
+  transform: none;
 }
 
 .code-block figcaption {
@@ -872,12 +872,12 @@ a {
 }
 
 .data-table-wrap {
-  width: min(58rem, calc(100% + 12rem));
-  margin: 37px 0 40px 50%;
+  width: min(var(--body-copy), 100%);
+  margin: 37px auto 40px;
   overflow-x: auto;
   border-top: 1px solid var(--line-strong);
   border-bottom: 1px solid var(--line-strong);
-  transform: translateX(-50%);
+  transform: none;
 }
 
 .data-table-wrap table {
@@ -961,9 +961,9 @@ a {
 }
 
 .evidence-figure {
-  width: min(61rem, calc(100% + 15rem));
-  margin: 43px 0 42px 50%;
-  transform: translateX(-50%);
+  width: min(var(--body-copy), 100%);
+  margin: 43px auto 42px;
+  transform: none;
 }
 
 .evidence-image-button {
@@ -1429,19 +1429,6 @@ dialog::backdrop {
     display: none;
   }
 
-  .code-block,
-  .data-table-wrap {
-    width: min(58rem, calc(100vw - 64px));
-    margin-left: 50%;
-    transform: translateX(-50%);
-  }
-
-  .evidence-figure {
-    width: min(61rem, calc(100vw - 64px));
-    margin-left: 50%;
-    transform: translateX(-50%);
-  }
-
   .mobile-toc-wrap {
     display: block;
     margin-bottom: 62px;
diff --git a/tests/features/tech-log/style-contract.test.ts b/tests/features/tech-log/style-contract.test.ts
index a076c7b..6ad287a 100644
--- a/tests/features/tech-log/style-contract.test.ts
+++ b/tests/features/tech-log/style-contract.test.ts
@@ -96,6 +96,59 @@ describe("TechLog consumer-visible style contract", () => {
     expect(getComputedStyle(wordmark).fontWeight).toBe("680");
   });
 
+  it("aligns code, table, and evidence widths with the article body", () => {
+    const view = renderPublicSurface(
+      createElement(
+        "main",
+        { id: "main-content", className: "shell" },
+        createElement(
+          "article",
+          { className: "document-body" },
+          createElement(
+            "section",
+            null,
+            createElement("p", null, "본문"),
+            createElement(
+              "figure",
+              { className: "code-block" },
+              createElement("pre", null, createElement("code", null, "code")),
+            ),
+            createElement(
+              "div",
+              { className: "data-table-wrap" },
+              createElement("table", null, createElement("tbody")),
+            ),
+            createElement(
+              "figure",
+              { className: "evidence-figure" },
+              createElement("img", { alt: "근거 자료" }),
+            ),
+          ),
+        ),
+      ),
+    );
+
+    const article = view.container.querySelector<HTMLElement>(".document-body");
+    const code = view.container.querySelector<HTMLElement>(".code-block");
+    const codeScroller = view.container.querySelector<HTMLElement>(
+      ".code-block pre",
+    );
+    const table = view.container.querySelector<HTMLElement>(".data-table-wrap");
+    const evidence = view.container.querySelector<HTMLElement>(
+      ".evidence-figure",
+    );
+
+    expect(getComputedStyle(article!).width).toBe("min(100%, var(--body-copy))");
+    for (const material of [code, table, evidence]) {
+      expect(getComputedStyle(material!).width).toBe(
+        "min(var(--body-copy), 100%)",
+      );
+      expect(getComputedStyle(material!).transform).toBe("none");
+    }
+    expect(getComputedStyle(codeScroller!).overflowX).toBe("auto");
+    expect(getComputedStyle(table!).overflowX).toBe("auto");
+  });
+
   it("preserves keyboard focus and the real search-field focus style", async () => {
     const user = userEvent.setup();
     const view = renderPublicSurface(