Attempt to improve focus ring styles in modern browsers.

[homepage.git] / content / style.scss

diff --git a/content/style.scss b/content/style.scss
index 04736d84fd4f61ade054a2b8d7eeb7a0ae63bc30..d53717d9d0f692a02d356d0cb5c27574b981d1a8 100644 (file)
--- a/content/style.scss
+++ b/content/style.scss
@@ -1,7 +1,7 @@
 /*!
  * Nick's web site: default stylesheet
  *
- * Copyright © 2018-2021 Nick Bowler
+ * Copyright © 2018-2022 Nick Bowler
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -32,6 +32,8 @@ $annotationcolour:  #708090;
 
 $tableshadecolour:  #f5f5f5;
 
+$focusringcolour: #628cb2;
+
 @mixin header_size($maxwidth, $fontsize) {
     font-size: $fontsize;
     max-width: 1em * ($maxwidth / $fontsize);
@@ -48,6 +50,12 @@ a:link { color: $linkdefaultcolour; border-color: $linkdefaultcolour; }
 a:visited { color: $linkvisitedcolour; border-color: $linkvisitedcolour; }
 a:active { color: $linkactivecolour; border-color: $linkactivecolour; }
 
+@supports (outline-style: auto) {
+    a:link { border-width: 0; }
+    a:focus { outline: auto $focusringcolour; }
+    li, td, dt { &>a:link { border: solid 1px transparent; } }
+}
+
 h1 { @include header_size(60em, 2em); }
 h2 { @include header_size(60em, 1.5em); }
 h5 { @include header_size(60em, 1em); }
@@ -275,10 +283,6 @@ $clickynames: name, date, size;
             }
         }
 
-        &:focus ~ table th.clicky-#{$col}>label~label>span:first-child {
-            border-color: $foregroundcolour;
-        }
-
         // Unhide to allow keyboard navigation
         display: block !important;
         pointer-events: none;
@@ -299,15 +303,22 @@ $clickynames: name, date, size;
             }
         }
 
-        &:focus ~ table th.clicky-#{$col}>label~label .svg {
-            border-color: $foregroundcolour;
-        }
-
         pointer-events: none;
         position: absolute;
         opacity: 0;
         z-index: -2;
     }
+
+    $focuslabel: ":focus ~ table th.clicky-#{$col}>label~label";
+    #{"input.clicky-#{$col+$focuslabel}"}>span:first-child
+    , #{"input.clicky-#{$col}-rev#{$focuslabel}"} .svg
+    {
+        border-color: $foregroundcolour;
+        @at-root { @supports (outline-style: auto) { & {
+            border-color: transparent;
+            outline: auto $focusringcolour;
+        }}}
+    }
 }
 
 thead.clicky label {
@@ -332,6 +343,10 @@ thead.clicky label {
     &:active { color: $linkactivecolour; }
     &:first-child:active>span, &~label:active>.svg {
         border-color: $linkactivecolour;
+        @at-root { @supports (outline-style: auto) { & {
+            border-color: transparent;
+            outline: auto $focusringcolour;
+        }}}
     }
 
     .svg {