clean up partials and styles

assets/sass/components/_syntax.scss

@@ -33,6 +33,11 @@ div.highlight span {
   // line numbers
   &.lnt {
     color: #999999;
-    user-select: none;  // maybe add prefixes? https://caniuse.com/#feat=user-select-none
+
+    // disable text selection: https://caniuse.com/#feat=user-select-none
+    -webkit-user-select: none;
+    -moz-user-select: none;
+    -ms-user-select: none;
+    user-select: none;
   }
 }

assets/sass/components/_wave.scss

@@ -1,6 +1,15 @@
 @charset "UTF-8";
 
 /*! Fancy Waving Hand Emoji (TM) - https://go.jarv.is/wave */
+
+span.wave {
+  display: inline-block;
+  animation-name: wave;
+  animation-duration: 2.5s;
+  animation-iteration-count: infinite;
+  transform-origin: 70% 70%;
+}
+
 @keyframes wave {
   0% { transform: rotate(  0.0deg); }
  10% { transform: rotate(-10.0deg); }

assets/sass/pages/_home.scss

@@ -12,14 +12,6 @@ main#home {
     font-size: 1.6em;
     font-weight: 500;
     line-height: 1.2;
-
-    span#wave {
-      display: inline-block;
-      animation-name: wave;
-      animation-duration: 2.5s;
-      animation-iteration-count: infinite;
-      transform-origin: 70% 70%;
-    }
   }
 
   h3 {

assets/sass/pages/_list.scss

@@ -29,12 +29,6 @@ main#list {
         flex-shrink: 0;
       }
 
-      &::after {
-        content: '';
-        display: block;
-        clear: both;
-      }
-
       + li {
         margin-top: 1.3em;
       }

assets/sass/pages/_single.scss

@@ -74,6 +74,7 @@ main#single {
         height: auto;
         border: 0;
 
+        // Subtitle caption styling
         // stylelint-disable-next-line selector-pseudo-element-no-unknown
         &::cue {
           font-family: inherit;

assets/sass/pages/_videos.scss

@@ -28,8 +28,8 @@ main#video {
   video {
     width: $responsive-width;
     height: auto;
-    font-family: inherit;    // for subtitles
 
+    // Subtitle caption styling
     // stylelint-disable-next-line selector-pseudo-element-no-unknown
     &::cue {
       font-family: inherit;