fix: make Home tool cards responsive

tests/test_app_page.py

@@ -33,6 +33,23 @@ def test_css_injects_before_sidebar_and_has_no_blocking_import():
     assert ui_source.index("_inject_global_css(\"dark\")") < ui_source.index("render_sidebar(active_page)")
 
 
+def test_home_tool_card_rows_wrap_at_responsive_breakpoints():
+    """Home card rows must reflow rather than shrink five cards into an
+    unreadable strip on laptop, tablet, and phone-sized viewports."""
+    ui_source = UI_MODULE.read_text(encoding="utf-8")
+    tool_row = '[data-testid="stHorizontalBlock"]:has([class*="st-key-tool_card_"])'
+
+    assert tool_row in ui_source
+    assert '[data-testid="stColumn"]' in ui_source
+    assert "@media (max-width: 1180px)" in ui_source
+    assert "flex-wrap: wrap;" in ui_source
+    assert "flex: 1 1 calc(33.333% - 1rem) !important;" in ui_source
+    assert "@media (max-width: 860px)" in ui_source
+    assert "flex-basis: calc(50% - 0.75rem) !important;" in ui_source
+    assert "@media (max-width: 560px)" in ui_source
+    assert "flex-basis: 100% !important;" in ui_source
+
+
 def test_home_pills_are_required_and_cannot_deselect_to_none():
     """Regression: st.pills defaults to required=False, meaning a click on an
     already-selected pill deselects it to None. The sort pill's value used to

tests/test_ip_geolocation.py

@@ -1,3 +1,6 @@
+from types import SimpleNamespace
+
+from utils import ip_geolocation
 from utils.ip_geolocation import lookup_ip_geolocation
 
 
@@ -15,12 +18,34 @@ def test_lookup_ip_geolocation_rejects_invalid_ip():
     assert "valid IPv4 or IPv6" in result["error"]
 
 
-def test_lookup_ip_geolocation_live_public_ip():
+def test_lookup_ip_geolocation_public_ip_parses_successful_response(monkeypatch):
+    """Public API behavior is covered without making the suite rate-limit- or
+    network-dependent; live endpoint availability is not an application unit
+    test contract."""
+    payload = {
+        "status": "success",
+        "country": "United States",
+        "regionName": "Virginia",
+        "city": "Ashburn",
+        "zip": "20149",
+        "lat": 39.03,
+        "lon": -77.5,
+        "timezone": "America/New_York",
+        "isp": "Google LLC",
+        "org": "Google Public DNS",
+        "as": "AS15169 Google LLC",
+    }
+    monkeypatch.setattr(
+        ip_geolocation.requests,
+        "get",
+        lambda *args, **kwargs: SimpleNamespace(status_code=200, json=lambda: payload),
+    )
+
     result = lookup_ip_geolocation("8.8.8.8")
 
     assert result["ok"] is True
     assert result["country"] == "United States"
-    assert result["asn"]
+    assert result["asn"] == "AS15169 Google LLC"
 
 
 def test_lookup_ip_geolocation_live_private_ip_returns_error():

utils/ui.py

@@ -4259,6 +4259,38 @@ def _inject_global_css(mode: str) -> None:
             box-shadow: 0 18px 36px rgba(0, 0, 0, 0.28);
         }
 
+        /* Streamlit columns stay on one row by default, which makes five-card
+           Home sections too narrow on laptops and tablet-sized windows. Scope
+           wrapping to rows containing tool-card containers so metric rows and
+           ordinary form columns retain Streamlit's native layout behavior. */
+        [data-testid="stHorizontalBlock"]:has([class*="st-key-tool_card_"]) {
+            align-items: stretch;
+        }
+
+        @media (max-width: 1180px) {
+            [data-testid="stHorizontalBlock"]:has([class*="st-key-tool_card_"]) {
+                flex-wrap: wrap;
+            }
+
+            [data-testid="stHorizontalBlock"]:has([class*="st-key-tool_card_"]) > [data-testid="stColumn"] {
+                flex: 1 1 calc(33.333% - 1rem) !important;
+                min-width: min(17rem, 100%) !important;
+            }
+        }
+
+        @media (max-width: 860px) {
+            [data-testid="stHorizontalBlock"]:has([class*="st-key-tool_card_"]) > [data-testid="stColumn"] {
+                flex-basis: calc(50% - 0.75rem) !important;
+            }
+        }
+
+        @media (max-width: 560px) {
+            [data-testid="stHorizontalBlock"]:has([class*="st-key-tool_card_"]) > [data-testid="stColumn"] {
+                flex-basis: 100% !important;
+                min-width: 0 !important;
+            }
+        }
+
         .tool-card-shell {
             position: relative;
             min-height: 15.1rem;