diff --git a/.jules/palette.md b/.jules/palette.md
new file mode 100644
index 0000000..d7c3c92
--- /dev/null
+++ b/.jules/palette.md
@@ -0,0 +1,4 @@
+## 2024-07-07 - Add definition lists to Fit Report metric cards
+
+**Learning:** Key-value pairs for metrics and statistics in HTML reports must use semantic `<dl>`, `<dt>`, and `<dd>` elements to properly associate the label with its value for screen readers. Using generic `<article>` or `<div>` with `<span>` and `<strong>` separates the semantic relationship. Additionally, default `<dt>` styling varies across browsers, so explicit `font-weight` resets are necessary to maintain cross-browser visual consistency while improving semantics. Also, relying purely on mouse interactions for focused tables (`:focus`) impacts mouse users visually - `:focus-visible` ensures focus outlines appear only during keyboard navigation. Purely visual charting elements (like horizontal bar tracks) inside HTML need `aria-hidden="true"` to prevent redundant, noisy announcements for screen reader users.
+**Action:** Always prefer definition lists (`<dl>`) over generic markup for metric pairs, and explicitly reset their font-weight in CSS. Use `:focus-visible` instead of `:focus` for generic focus styles, and add `aria-hidden="true"` to decorative/visual chart tracks.
diff --git a/python/fast_mlsirm/report.py b/python/fast_mlsirm/report.py
index 9d70dcb..12a4f20 100644
--- a/python/fast_mlsirm/report.py
+++ b/python/fast_mlsirm/report.py
@@ -69,7 +69,7 @@ def _render_html(payload: dict[str, Any], report_type: str, title: str, source_n
             "<main>",
             '<section class="hero">',
             '<div class="hero-copy">',
-            f"<p>fast-mlsirm diagnostics</p>",
+            "<p>fast-mlsirm diagnostics</p>",
             f"<h1>{escape(title)}</h1>",
             f"<span>Source: {escape(source_name)}</span>",
             "</div>",
@@ -165,10 +165,10 @@ def _metric_section(heading: str, metrics: dict[str, Any]) -> str | None:
         cards.append(
             "\n".join(
                 [
-                    '<article class="metric-card">',
-                    f"<span>{escape(_label(key))}</span>",
-                    f"<strong>{escape(_format_value(value))}</strong>",
-                    "</article>",
+                    '<div class="metric-card">',
+                    f"<dt>{escape(_label(key))}</dt>",
+                    f"<dd>{escape(_format_value(value))}</dd>",
+                    "</div>",
                 ]
             )
         )
@@ -179,9 +179,9 @@ def _metric_section(heading: str, metrics: dict[str, Any]) -> str | None:
         [
             '<section class="report-section">',
             f"<h2>{escape(heading)}</h2>",
-            '<div class="metrics-grid">',
+            '<dl class="metrics-grid">',
             *cards,
-            "</div>",
+            "</dl>",
             "</section>",
         ]
     )
@@ -265,7 +265,7 @@ def _bar_chart(rows: list[dict[str, Any]], value_key: str | None) -> str:
                 [
                     '<div class="bar-row">',
                     f'<span class="bar-label">{escape(_row_label(row, index))}</span>',
-                    '<div class="bar-track">',
+                    '<div class="bar-track" aria-hidden="true">',
                     f'<div class="bar-fill" style="width: {width:.1f}%"></div>',
                     "</div>",
                     f'<span class="bar-value">{escape(_format_value(value))}</span>',
@@ -279,7 +279,7 @@ def _bar_chart(rows: list[dict[str, Any]], value_key: str | None) -> str:
 
     return "\n".join(
         [
-            '<div class="bar-chart" role="img" aria-label="Compact diagnostics bar chart">',
+            '<div class="bar-chart" aria-hidden="true">',
             *chart_rows,
             "</div>",
         ]
@@ -477,6 +477,7 @@ def _css() -> str:
   display: grid;
   grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
   gap: 12px;
+  margin: 0;
 }
 
 .metric-card {
@@ -487,16 +488,19 @@ def _css() -> str:
   background: #fafafa;
 }
 
-.metric-card span {
+.metric-card dt {
   display: block;
   color: var(--muted);
   font-size: 0.82rem;
+  font-weight: normal;
+  margin: 0;
 }
 
-.metric-card strong {
+.metric-card dd {
   display: block;
-  margin-top: 8px;
+  margin: 8px 0 0 0;
   font-size: 1.45rem;
+  font-weight: bold;
   overflow-wrap: anywhere;
 }
 
@@ -574,7 +578,7 @@ def _css() -> str:
   border-radius: 8px;
 }
 
-.table-wrap:focus {
+.table-wrap:focus-visible {
   outline: 3px solid #0f766e;
   outline-offset: 3px;
 }
@@ -615,6 +619,10 @@ def _css() -> str:
   border-bottom: 0;
 }
 
+tbody tr:hover {
+  background: #fbfcfa;
+}
+
 .empty-state {
   margin: 0;
   padding: 14px;
diff --git a/scripts/build_benchmark_report.py b/scripts/build_benchmark_report.py
index ddd37b4..48ed07f 100644
--- a/scripts/build_benchmark_report.py
+++ b/scripts/build_benchmark_report.py
@@ -324,7 +324,7 @@ def _report_css() -> str:
   border: 1px solid #d8e1e3;
   border-radius: 8px;
 }
-.table-wrap:focus {
+.table-wrap:focus-visible {
   outline: 3px solid #0f766e;
   outline-offset: 3px;
 }
diff --git a/scripts/build_buyer_packet.py b/scripts/build_buyer_packet.py
index 5d0512b..d36e5d0 100644
--- a/scripts/build_buyer_packet.py
+++ b/scripts/build_buyer_packet.py
@@ -378,7 +378,7 @@ def _report_css() -> str:
   border: 1px solid #d8e1e3;
   border-radius: 8px;
 }
-.table-wrap:focus {
+.table-wrap:focus-visible {
   outline: 3px solid #0f766e;
   outline-offset: 3px;
 }
diff --git a/scripts/build_commercial_release.py b/scripts/build_commercial_release.py
index c21e5e3..f2fb6d8 100644
--- a/scripts/build_commercial_release.py
+++ b/scripts/build_commercial_release.py
@@ -302,7 +302,7 @@ def _report_css() -> str:
   border: 1px solid #d8e1e3;
   border-radius: 8px;
 }
-.table-wrap:focus {
+.table-wrap:focus-visible {
   outline: 3px solid #0f766e;
   outline-offset: 3px;
 }
diff --git a/scripts/build_figma_evidence_sync.py b/scripts/build_figma_evidence_sync.py
index ee66f91..316d7a6 100644
--- a/scripts/build_figma_evidence_sync.py
+++ b/scripts/build_figma_evidence_sync.py
@@ -132,7 +132,7 @@ def _report_css() -> str:
 .metric-card span { display: block; color: #5e6f76; font-size: 0.8rem; font-weight: 700; text-transform: uppercase; }
 .metric-card strong { display: block; margin-top: 8px; overflow-wrap: anywhere; }
 .table-wrap { overflow-x: auto; border: 1px solid #d8e1e3; border-radius: 8px; }
-.table-wrap:focus { outline: 3px solid #0f766e; outline-offset: 3px; }
+.table-wrap:focus-visible { outline: 3px solid #0f766e; outline-offset: 3px; }
 table { width: 100%; min-width: 760px; border-collapse: collapse; }
 caption { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
 th, td { padding: 10px 12px; border-bottom: 1px solid #e8edef; text-align: left; vertical-align: top; }
diff --git a/scripts/build_pr_queue_governance.py b/scripts/build_pr_queue_governance.py
index d9ca8fa..c352374 100644
--- a/scripts/build_pr_queue_governance.py
+++ b/scripts/build_pr_queue_governance.py
@@ -272,7 +272,7 @@ def _report_css() -> str:
 .metric-card span { display: block; color: #5e6f76; font-size: 0.8rem; font-weight: 700; text-transform: uppercase; }
 .metric-card strong { display: block; margin-top: 8px; overflow-wrap: anywhere; }
 .table-wrap { overflow-x: auto; border: 1px solid #d8e1e3; border-radius: 8px; }
-.table-wrap:focus { outline: 3px solid #0f766e; outline-offset: 3px; }
+.table-wrap:focus-visible { outline: 3px solid #0f766e; outline-offset: 3px; }
 table { width: 100%; min-width: 920px; border-collapse: collapse; }
 caption { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
 th, td { padding: 10px 12px; border-bottom: 1px solid #e8edef; text-align: left; vertical-align: top; }
diff --git a/scripts/build_procurement_due_diligence.py b/scripts/build_procurement_due_diligence.py
index 2caaa35..7efea1d 100644
--- a/scripts/build_procurement_due_diligence.py
+++ b/scripts/build_procurement_due_diligence.py
@@ -303,7 +303,7 @@ def _report_css() -> str:
 .metric-card span { display: block; color: #5e6f76; font-size: 0.8rem; font-weight: 700; text-transform: uppercase; }
 .metric-card strong { display: block; margin-top: 8px; overflow-wrap: anywhere; }
 .table-wrap { overflow-x: auto; border: 1px solid #d8e1e3; border-radius: 8px; }
-.table-wrap:focus { outline: 3px solid #0f766e; outline-offset: 3px; }
+.table-wrap:focus-visible { outline: 3px solid #0f766e; outline-offset: 3px; }
 table { width: 100%; min-width: 760px; border-collapse: collapse; }
 caption { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
 th, td { padding: 10px 12px; border-bottom: 1px solid #e8edef; text-align: left; vertical-align: top; }
diff --git a/scripts/build_release_evidence_index.py b/scripts/build_release_evidence_index.py
index e79971a..28b79ce 100644
--- a/scripts/build_release_evidence_index.py
+++ b/scripts/build_release_evidence_index.py
@@ -331,7 +331,7 @@ def _report_css() -> str:
   border: 1px solid #d8e1e3;
   border-radius: 8px;
 }
-.table-wrap:focus {
+.table-wrap:focus-visible {
   outline: 3px solid #0f766e;
   outline-offset: 3px;
 }
diff --git a/tests/test_report.py b/tests/test_report.py
index 0b29e0e..8104d07 100644
--- a/tests/test_report.py
+++ b/tests/test_report.py
@@ -31,6 +31,9 @@ def test_render_fit_diagnostics_report_has_sections(tmp_path):
     html = out.read_text(encoding="utf-8")
     assert "Example Fit" in html
     assert "Model Fit" in html
+    assert '<dl class="metrics-grid">' in html
+    assert "<dt>Loglik</dt>" in html
+    assert "<dd>-3.2</dd>" in html
     assert "Item Fit" in html
     assert "Diagnostics Coverage" in html
     assert "No row data" in html
@@ -225,4 +228,8 @@ def test_render_table_region_has_keyboard_focus_style(tmp_path):
     html = out.read_text(encoding="utf-8")
     assert 'aria-label="Candidate Comparison diagnostics table"' in html
     assert 'tabindex="0"' in html
-    assert ".table-wrap:focus" in html
+    assert ".table-wrap:focus-visible" in html
+    assert ".table-wrap:focus {" not in html
+    assert "tbody tr:hover" in html
+    assert '<div class="bar-chart" aria-hidden="true">' in html
+    assert '<div class="bar-track" aria-hidden="true">' in html