Merge pull request #931 from vsalvino/darkmode

Add dark mode, and other design changes for the HTML report.

25 files changed, 275 insertions, 116 deletions

diff --git a/tests/gold/html/a/a_py.html b/tests/gold/html/a/a_py.html
index 2ce52414..d534c6a3 100644
--- a/tests/gold/html/a/a_py.html
+++ b/tests/gold/html/a/a_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             3 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">1 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">1 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/b_branch/b_py.html b/tests/gold/html/b_branch/b_py.html
index ce8bb875..67a1b83b 100644
--- a/tests/gold/html/b_branch/b_py.html
+++ b/tests/gold/html/b_branch/b_py.html
@@ -22,10 +22,10 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             17 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">14 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">3 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
-                <span class="par run show_par shortkey_p button_toggle_par">4 partial</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">14 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">3 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
+            <button type="button" class="par run show_par shortkey_p button_toggle_par" title="Toggle lines partially run">4 partial</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/bom/2/bom_py.html b/tests/gold/html/bom/2/bom_py.html
index 3d1c98fb..74f4f2fe 100644
--- a/tests/gold/html/bom/2/bom_py.html
+++ b/tests/gold/html/bom/2/bom_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             7 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">5 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">2 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">5 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">2 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/bom/bom_py.html b/tests/gold/html/bom/bom_py.html
index 635f8b51..10b84ede 100644
--- a/tests/gold/html/bom/bom_py.html
+++ b/tests/gold/html/bom/bom_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             7 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">5 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">2 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">5 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">2 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/isolatin1/isolatin1_py.html b/tests/gold/html/isolatin1/isolatin1_py.html
index 9c12c445..b344bad6 100644
--- a/tests/gold/html/isolatin1/isolatin1_py.html
+++ b/tests/gold/html/isolatin1/isolatin1_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             2 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_1/m1_py.html b/tests/gold/html/omit_1/m1_py.html
index 60923930..57584495 100644
--- a/tests/gold/html/omit_1/m1_py.html
+++ b/tests/gold/html/omit_1/m1_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             2 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_1/m2_py.html b/tests/gold/html/omit_1/m2_py.html
index de060f32..e8c1791d 100644
--- a/tests/gold/html/omit_1/m2_py.html
+++ b/tests/gold/html/omit_1/m2_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             2 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_1/m3_py.html b/tests/gold/html/omit_1/m3_py.html
index 76a91a4a..e714d47f 100644
--- a/tests/gold/html/omit_1/m3_py.html
+++ b/tests/gold/html/omit_1/m3_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             2 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_1/main_py.html b/tests/gold/html/omit_1/main_py.html
index 9f242537..28173d12 100644
--- a/tests/gold/html/omit_1/main_py.html
+++ b/tests/gold/html/omit_1/main_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             8 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">8 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">8 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_2/m2_py.html b/tests/gold/html/omit_2/m2_py.html
index de060f32..e8c1791d 100644
--- a/tests/gold/html/omit_2/m2_py.html
+++ b/tests/gold/html/omit_2/m2_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             2 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_2/m3_py.html b/tests/gold/html/omit_2/m3_py.html
index 76a91a4a..e714d47f 100644
--- a/tests/gold/html/omit_2/m3_py.html
+++ b/tests/gold/html/omit_2/m3_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             2 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_2/main_py.html b/tests/gold/html/omit_2/main_py.html
index 9f242537..28173d12 100644
--- a/tests/gold/html/omit_2/main_py.html
+++ b/tests/gold/html/omit_2/main_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             8 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">8 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">8 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_3/m3_py.html b/tests/gold/html/omit_3/m3_py.html
index 76a91a4a..e714d47f 100644
--- a/tests/gold/html/omit_3/m3_py.html
+++ b/tests/gold/html/omit_3/m3_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             2 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_3/main_py.html b/tests/gold/html/omit_3/main_py.html
index 9f242537..28173d12 100644
--- a/tests/gold/html/omit_3/main_py.html
+++ b/tests/gold/html/omit_3/main_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             8 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">8 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">8 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_4/m1_py.html b/tests/gold/html/omit_4/m1_py.html
index 60923930..57584495 100644
--- a/tests/gold/html/omit_4/m1_py.html
+++ b/tests/gold/html/omit_4/m1_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             2 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_4/m3_py.html b/tests/gold/html/omit_4/m3_py.html
index 76a91a4a..e714d47f 100644
--- a/tests/gold/html/omit_4/m3_py.html
+++ b/tests/gold/html/omit_4/m3_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             2 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_4/main_py.html b/tests/gold/html/omit_4/main_py.html
index 9f242537..28173d12 100644
--- a/tests/gold/html/omit_4/main_py.html
+++ b/tests/gold/html/omit_4/main_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             8 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">8 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">8 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_5/m1_py.html b/tests/gold/html/omit_5/m1_py.html
index 60923930..57584495 100644
--- a/tests/gold/html/omit_5/m1_py.html
+++ b/tests/gold/html/omit_5/m1_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             2 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/omit_5/main_py.html b/tests/gold/html/omit_5/main_py.html
index 9f242537..28173d12 100644
--- a/tests/gold/html/omit_5/main_py.html
+++ b/tests/gold/html/omit_5/main_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             8 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">8 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">8 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/other/blah_blah_other_py.html b/tests/gold/html/other/blah_blah_other_py.html
index d3a4ebfc..8f0309d4 100644
--- a/tests/gold/html/other/blah_blah_other_py.html
+++ b/tests/gold/html/other/blah_blah_other_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             1 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">1 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">1 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/other/here_py.html b/tests/gold/html/other/here_py.html
index df2715d6..c2f6b5f1 100644
--- a/tests/gold/html/other/here_py.html
+++ b/tests/gold/html/other/here_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             4 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">3 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">1 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">3 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">1 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/partial/partial_py.html b/tests/gold/html/partial/partial_py.html
index f004808a..abd755d0 100644
--- a/tests/gold/html/partial/partial_py.html
+++ b/tests/gold/html/partial/partial_py.html
@@ -22,10 +22,10 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             7 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">7 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">1 excluded</span>
-                <span class="par run show_par shortkey_p button_toggle_par">1 partial</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">7 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">1 excluded</button>
+            <button type="button" class="par run show_par shortkey_p button_toggle_par" title="Toggle lines partially run">1 partial</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/styled/a_py.html b/tests/gold/html/styled/a_py.html
index 4687e464..7b6f9dcd 100644
--- a/tests/gold/html/styled/a_py.html
+++ b/tests/gold/html/styled/a_py.html
@@ -23,9 +23,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             3 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">1 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">1 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>
diff --git a/tests/gold/html/styled/style.css b/tests/gold/html/styled/style.css
index e8ff5765..ab9dbcb9 100644
--- a/tests/gold/html/styled/style.css
+++ b/tests/gold/html/styled/style.css
@@ -4,11 +4,17 @@
 /* Don't edit this .css file. Edit the .scss file instead! */
 html, body, h1, h2, h3, p, table, td, th { margin: 0; padding: 0; border: 0; font-weight: inherit; font-style: inherit; font-size: 100%; font-family: inherit; vertical-align: baseline; }
 
-body { font-family: georgia, serif; font-size: 1em; }
+body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, Cantarell, "Helvetica Neue", sans-serif; font-size: 1em; background: #fff; color: #000; }
+
+@media (prefers-color-scheme: dark) { body { background: #1e1e1e; } }
+
+@media (prefers-color-scheme: dark) { body { color: #eee; } }
 
 html > body { font-size: 16px; }
 
-p { font-size: .75em; line-height: 1.33333333em; }
+a:active, a:focus { outline: 2px dashed #007acc; }
+
+p { font-size: .875em; line-height: 1.4em; }
 
 table { border-collapse: collapse; }
 
@@ -19,15 +25,22 @@ table tr.hidden { display: none !important; }
 p#no_rows { display: none; font-size: 1.2em; }
 
 a.nav { text-decoration: none; color: inherit; }
+
 a.nav:hover { text-decoration: underline; color: inherit; }
 
 #header { background: #f8f8f8; width: 100%; border-bottom: 1px solid #eee; }
 
+@media (prefers-color-scheme: dark) { #header { background: black; } }
+
+@media (prefers-color-scheme: dark) { #header { border-color: #333; } }
+
 .indexfile #footer { margin: 1em 3em; }
 
 .pyfile #footer { margin: 1em 1em; }
 
-#footer .content { padding: 0; font-size: 85%; font-family: verdana, sans-serif; color: #666666; font-style: italic; }
+#footer .content { padding: 0; color: #666; font-style: italic; }
+
+@media (prefers-color-scheme: dark) { #footer .content { color: #aaa; } }
 
 #index { margin: 1em 0 0 3em; }
 
@@ -35,90 +48,236 @@ a.nav:hover { text-decoration: underline; color: inherit; }
 
 h1 { font-size: 1.25em; display: inline-block; }
 
-#filter_container { display: inline-block; float: right; margin: 0 2em 0 0; }
-#filter_container input { width: 10em; }
+#filter_container { float: right; margin: 0 2em 0 0; }
+
+#filter_container input { width: 10em; padding: 0.2em 0.5em; border: 2px solid #ccc; background: #fff; color: #000; }
+
+@media (prefers-color-scheme: dark) { #filter_container input { border-color: #444; } }
+
+@media (prefers-color-scheme: dark) { #filter_container input { background: #1e1e1e; } }
+
+@media (prefers-color-scheme: dark) { #filter_container input { color: #eee; } }
+
+#filter_container input:focus { border-color: #007acc; }
 
 h2.stats { margin-top: .5em; font-size: 1em; }
 
-.stats span { border: 1px solid; border-radius: .1em; padding: .1em .5em; margin: 0 .1em; cursor: pointer; border-color: #ccc #999 #999 #ccc; }
-.stats span.run { background: #eeffee; }
-.stats span.run.show_run { border-color: #999 #ccc #ccc #999; background: #ddffdd; }
-.stats span.mis { background: #ffeeee; }
-.stats span.mis.show_mis { border-color: #999 #ccc #ccc #999; background: #ffdddd; }
-.stats span.exc { background: #f7f7f7; }
-.stats span.exc.show_exc { border-color: #999 #ccc #ccc #999; background: #eeeeee; }
-.stats span.par { background: #ffffd5; }
-.stats span.par.show_par { border-color: #999 #ccc #ccc #999; background: #ffffaa; }
+.stats button { font-family: inherit; font-size: inherit; border: 2px solid; border-radius: .1em; color: inherit; padding: .1em .5em; margin: 0 .1em; cursor: pointer; border-color: #ccc; }
+
+@media (prefers-color-scheme: dark) { .stats button { border-color: #444; } }
+
+.stats button:active, .stats button:focus { outline: 2px dashed #007acc; }
+
+.stats button:active, .stats button:focus { outline: 2px dashed #007acc; }
+
+.stats button.run { background: #eeffee; }
+
+@media (prefers-color-scheme: dark) { .stats button.run { background: #373d29; } }
+
+.stats button.run.show_run { background: #dfd; border-color: #00dd00; }
+
+@media (prefers-color-scheme: dark) { .stats button.run.show_run { background: #373d29; } }
+
+.stats button.mis { background: #ffeeee; }
+
+@media (prefers-color-scheme: dark) { .stats button.mis { background: #4b1818; } }
+
+.stats button.mis.show_mis { background: #fdd; border-color: #ff0000; }
+
+@media (prefers-color-scheme: dark) { .stats button.mis.show_mis { background: #4b1818; } }
+
+.stats button.exc { background: #f7f7f7; }
+
+@media (prefers-color-scheme: dark) { .stats button.exc { background: #333; } }
+
+.stats button.exc.show_exc { background: #eee; border-color: #808080; }
+
+@media (prefers-color-scheme: dark) { .stats button.exc.show_exc { background: #333; } }
+
+.stats button.par { background: #ffffd5; }
 
-#source p .annotate.long, .help_panel { display: none; position: absolute; z-index: 999; background: #ffffcc; border: 1px solid #888; border-radius: .2em; box-shadow: #cccccc .2em .2em .2em; color: #333; padding: .25em .5em; }
+@media (prefers-color-scheme: dark) { .stats button.par { background: #650; } }
+
+.stats button.par.show_par { background: #ffa; border-color: #dddd00; }
+
+@media (prefers-color-scheme: dark) { .stats button.par.show_par { background: #650; } }
+
+.help_panel, #source p .annotate.long { display: none; position: absolute; z-index: 999; background: #ffffcc; border: 1px solid #888; border-radius: .2em; color: #333; padding: .25em .5em; }
 
 #source p .annotate.long { white-space: normal; float: right; top: 1.75em; right: 1em; height: auto; }
 
 #keyboard_icon { float: right; margin: 5px; cursor: pointer; }
 
 .help_panel { padding: .5em; border: 1px solid #883; }
+
 .help_panel .legend { font-style: italic; margin-bottom: 1em; }
-.indexfile .help_panel { width: 20em; height: 4em; }
-.pyfile .help_panel { width: 16em; height: 8em; }
+
+.indexfile .help_panel { width: 20em; min-height: 4em; }
+
+.pyfile .help_panel { width: 16em; min-height: 8em; }
 
 #panel_icon { float: right; cursor: pointer; }
 
 .keyhelp { margin: .75em; }
-.keyhelp .key { border: 1px solid black; border-color: #888 #333 #333 #888; padding: .1em .35em; font-family: monospace; font-weight: bold; background: #eee; }
 
-#source { padding: 1em 0 1em 3rem; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; }
+.keyhelp .key { border: 1px solid black; border-color: #888 #333 #333 #888; padding: .1em .35em; font-family: SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-weight: bold; background: #eee; }
+
+#source { padding: 1em 0 1em 3rem; font-family: SFMono-Regular, Menlo, Monaco, Consolas, monospace; }
+
 #source p { position: relative; white-space: pre; }
+
 #source p * { box-sizing: border-box; }
-#source p .n { float: left; text-align: right; width: 3rem; box-sizing: border-box; margin-left: -3rem; padding-right: 1em; color: #999999; font-family: verdana, sans-serif; }
-#source p .n a { text-decoration: none; color: #999999; font-size: .8333em; line-height: 1em; }
-#source p .n a:hover { text-decoration: underline; color: #999999; }
+
+#source p .n { float: left; text-align: right; width: 3rem; box-sizing: border-box; margin-left: -3rem; padding-right: 1em; color: #999; }
+
+@media (prefers-color-scheme: dark) { #source p .n { color: #777; } }
+
+#source p .n a { text-decoration: none; color: #999; }
+
+@media (prefers-color-scheme: dark) { #source p .n a { color: #777; } }
+
+#source p .n a:hover { text-decoration: underline; color: #999; }
+
+@media (prefers-color-scheme: dark) { #source p .n a:hover { color: #777; } }
+
 #source p.highlight .n { background: #ffdd00; }
-#source p .t { display: inline-block; width: 100%; box-sizing: border-box; margin-left: -.5em; padding-left: 0.3em; border-left: 0.2em solid white; }
+
+#source p .t { display: inline-block; width: 100%; box-sizing: border-box; margin-left: -.5em; padding-left: 0.3em; border-left: 0.2em solid #fff; }
+
+@media (prefers-color-scheme: dark) { #source p .t { border-color: #1e1e1e; } }
+
 #source p .t:hover { background: #f2f2f2; }
+
+@media (prefers-color-scheme: dark) { #source p .t:hover { background: #282828; } }
+
 #source p .t:hover ~ .r .annotate.long { display: block; }
-#source p .t .com { color: green; font-style: italic; line-height: 1px; }
+
+#source p .t .com { color: #008000; font-style: italic; line-height: 1px; }
+
+@media (prefers-color-scheme: dark) { #source p .t .com { color: #6A9955; } }
+
 #source p .t .key { font-weight: bold; line-height: 1px; }
-#source p .t .str { color: #000080; }
+
+#source p .t .str { color: #0451A5; }
+
+@media (prefers-color-scheme: dark) { #source p .t .str { color: #9CDCFE; } }
+
 #source p.mis .t { border-left: 0.2em solid #ff0000; }
-#source p.mis.show_mis .t { background: #ffdddd; }
+
+#source p.mis.show_mis .t { background: #fdd; }
+
+@media (prefers-color-scheme: dark) { #source p.mis.show_mis .t { background: #4b1818; } }
+
 #source p.mis.show_mis .t:hover { background: #f2d2d2; }
-#source p.run .t { border-left: 0.2em solid #00ff00; }
-#source p.run.show_run .t { background: #ddffdd; }
+
+@media (prefers-color-scheme: dark) { #source p.mis.show_mis .t:hover { background: #532323; } }
+
+#source p.run .t { border-left: 0.2em solid #00dd00; }
+
+#source p.run.show_run .t { background: #dfd; }
+
+@media (prefers-color-scheme: dark) { #source p.run.show_run .t { background: #373d29; } }
+
 #source p.run.show_run .t:hover { background: #d2f2d2; }
+
+@media (prefers-color-scheme: dark) { #source p.run.show_run .t:hover { background: #404633; } }
+
 #source p.exc .t { border-left: 0.2em solid #808080; }
-#source p.exc.show_exc .t { background: #eeeeee; }
+
+#source p.exc.show_exc .t { background: #eee; }
+
+@media (prefers-color-scheme: dark) { #source p.exc.show_exc .t { background: #333; } }
+
 #source p.exc.show_exc .t:hover { background: #e2e2e2; }
-#source p.par .t { border-left: 0.2em solid #eeee99; }
-#source p.par.show_par .t { background: #ffffaa; }
+
+@media (prefers-color-scheme: dark) { #source p.exc.show_exc .t:hover { background: #3c3c3c; } }
+
+#source p.par .t { border-left: 0.2em solid #dddd00; }
+
+#source p.par.show_par .t { background: #ffa; }
+
+@media (prefers-color-scheme: dark) { #source p.par.show_par .t { background: #650; } }
+
 #source p.par.show_par .t:hover { background: #f2f2a2; }
-#source p .r { position: absolute; top: 0; right: 2.5em; font-family: verdana, sans-serif; }
-#source p .annotate { font-family: georgia; color: #666; padding-right: .5em; }
+
+@media (prefers-color-scheme: dark) { #source p.par.show_par .t:hover { background: #6d5d0c; } }
+
+#source p .r { position: absolute; top: 0; right: 2.5em; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, Cantarell, "Helvetica Neue", sans-serif; }
+
+#source p .annotate { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, Cantarell, "Helvetica Neue", sans-serif; color: #666; padding-right: .5em; }
+
+@media (prefers-color-scheme: dark) { #source p .annotate { color: #ddd; } }
+
 #source p .annotate.short:hover ~ .long { display: block; }
+
 #source p .annotate.long { width: 30em; right: 2.5em; }
+
 #source p input { display: none; }
+
 #source p input ~ .r label.ctx { cursor: pointer; border-radius: .25em; }
+
 #source p input ~ .r label.ctx::before { content: "▶ "; }
+
 #source p input ~ .r label.ctx:hover { background: #d5f7ff; color: #666; }
+
 #source p input:checked ~ .r label.ctx { background: #aaeeff; color: #666; border-radius: .75em .75em 0 0; padding: 0 .5em; margin: -.25em 0; }
+
 #source p input:checked ~ .r label.ctx::before { content: "▼ "; }
+
 #source p input:checked ~ .ctxs { padding: .25em .5em; overflow-y: scroll; max-height: 10.5em; }
+
 #source p label.ctx { color: #999; display: inline-block; padding: 0 .5em; font-size: .8333em; }
-#source p .ctxs { display: block; max-height: 0; overflow-y: hidden; transition: all .2s; padding: 0 .5em; font-family: verdana, sans-serif; white-space: nowrap; background: #aaeeff; border-radius: .25em; margin-right: 1.75em; }
+
+@media (prefers-color-scheme: dark) { #source p label.ctx { color: #777; } }
+
+#source p .ctxs { display: block; max-height: 0; overflow-y: hidden; transition: all .2s; padding: 0 .5em; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, Cantarell, "Helvetica Neue", sans-serif; white-space: nowrap; background: #aaeeff; border-radius: .25em; margin-right: 1.75em; }
+
 #source p .ctxs span { display: block; text-align: right; }
 
+#index { font-family: SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 0.875em; }
+
 #index td, #index th { text-align: right; width: 5em; padding: .25em .5em; border-bottom: 1px solid #eee; }
+
+@media (prefers-color-scheme: dark) { #index td, #index th { border-color: #333; } }
+
 #index td.left, #index th.left { padding-left: 0; }
+
 #index td.right, #index th.right { padding-right: 0; }
+
 #index td.name, #index th.name { text-align: left; width: auto; }
-#index th { font-style: italic; color: #333; border-bottom: 1px solid #ccc; cursor: pointer; }
-#index th:hover { background: #eee; border-bottom: 1px solid #999; }
-#index th.headerSortDown, #index th.headerSortUp { border-bottom: 1px solid #000; white-space: nowrap; background: #eee; }
+
+#index th { font-style: italic; color: #333; cursor: pointer; }
+
+@media (prefers-color-scheme: dark) { #index th { color: #ddd; } }
+
+#index th:hover { background: #eee; }
+
+@media (prefers-color-scheme: dark) { #index th:hover { background: #333; } }
+
+#index th.headerSortDown, #index th.headerSortUp { white-space: nowrap; background: #eee; }
+
+@media (prefers-color-scheme: dark) { #index th.headerSortDown, #index th.headerSortUp { background: #333; } }
+
 #index th.headerSortDown:after { content: " ↓"; }
+
 #index th.headerSortUp:after { content: " ↑"; }
-#index td.name a { text-decoration: none; color: #000; }
+
+#index td.name a { text-decoration: none; color: inherit; }
+
 #index tr.total td, #index tr.total_dynamic td { font-weight: bold; border-top: 1px solid #ccc; border-bottom: none; }
-#index tr.file:hover { background: #eeeeee; }
-#index tr.file:hover td.name { text-decoration: underline; color: #000; }
 
-#scroll_marker { position: fixed; right: 0; top: 0; width: 16px; height: 100%; background: white; border-left: 1px solid #eee; will-change: transform; }
-#scroll_marker .marker { background: #ddd; position: absolute; min-height: 3px; width: 100%; }
+#index tr.file:hover { background: #eee; }
+
+@media (prefers-color-scheme: dark) { #index tr.file:hover { background: #333; } }
+
+#index tr.file:hover td.name { text-decoration: underline; color: inherit; }
+
+#scroll_marker { position: fixed; right: 0; top: 0; width: 16px; height: 100%; background: #fff; border-left: 1px solid #eee; will-change: transform; }
+
+@media (prefers-color-scheme: dark) { #scroll_marker { background: #1e1e1e; } }
+
+@media (prefers-color-scheme: dark) { #scroll_marker { border-color: #333; } }
+
+#scroll_marker .marker { background: #ccc; position: absolute; min-height: 3px; width: 100%; }
+
+@media (prefers-color-scheme: dark) { #scroll_marker .marker { background: #444; } }
diff --git a/tests/gold/html/unicode/unicode_py.html b/tests/gold/html/unicode/unicode_py.html
index 46722961..a4218bcc 100644
--- a/tests/gold/html/unicode/unicode_py.html
+++ b/tests/gold/html/unicode/unicode_py.html
@@ -22,9 +22,9 @@
         <img id="keyboard_icon" src="keybd_closed.png" alt="Show keyboard shortcuts" />
         <h2 class="stats">
             2 statements &nbsp;
-            <span class="run shortkey_r button_toggle_run">2 run</span>
-            <span class="mis show_mis shortkey_m button_toggle_mis">0 missing</span>
-            <span class="exc show_exc shortkey_x button_toggle_exc">0 excluded</span>
+            <button type="button" class="run shortkey_r button_toggle_run" title="Toggle lines run">2 run</button>
+            <button type="button" class="mis show_mis shortkey_m button_toggle_mis" title="Toggle lines missing">0 missing</button>
+            <button type="button" class="exc show_exc shortkey_x button_toggle_exc" title="Toggle lines excluded">0 excluded</button>
         </h2>
     </div>
 </div>