Fix theme button DOM hierarchy and styles

quartz/components/Darkmode.tsx

@@ -10,7 +10,6 @@ import { classNames } from "../util/lang"
 const Darkmode: QuartzComponent = ({ displayClass, cfg }: QuartzComponentProps) => {
   return (
     <button class={classNames(displayClass, "darkmode")} id="darkmode">
-      <label id="toggle-label-light" for="darkmode-toggle">
       <svg
         xmlns="http://www.w3.org/2000/svg"
         xmlnsXlink="http://www.w3.org/1999/xlink"
@@ -25,8 +24,6 @@ const Darkmode: QuartzComponent = ({ displayClass, cfg }: QuartzComponentProps)
         <title>{i18n(cfg.locale).components.themeToggle.darkMode}</title>
         <path d="M6,17.5C6,16.672,5.328,16,4.5,16h-3C0.672,16,0,16.672,0,17.5    S0.672,19,1.5,19h3C5.328,19,6,18.328,6,17.5z M7.5,26c-0.414,0-0.789,0.168-1.061,0.439l-2,2C4.168,28.711,4,29.086,4,29.5    C4,30.328,4.671,31,5.5,31c0.414,0,0.789-0.168,1.06-0.44l2-2C8.832,28.289,9,27.914,9,27.5C9,26.672,8.329,26,7.5,26z M17.5,6    C18.329,6,19,5.328,19,4.5v-3C19,0.672,18.329,0,17.5,0S16,0.672,16,1.5v3C16,5.328,16.671,6,17.5,6z M27.5,9    c0.414,0,0.789-0.168,1.06-0.439l2-2C30.832,6.289,31,5.914,31,5.5C31,4.672,30.329,4,29.5,4c-0.414,0-0.789,0.168-1.061,0.44    l-2,2C26.168,6.711,26,7.086,26,7.5C26,8.328,26.671,9,27.5,9z M6.439,8.561C6.711,8.832,7.086,9,7.5,9C8.328,9,9,8.328,9,7.5    c0-0.414-0.168-0.789-0.439-1.061l-2-2C6.289,4.168,5.914,4,5.5,4C4.672,4,4,4.672,4,5.5c0,0.414,0.168,0.789,0.439,1.06    L6.439,8.561z M33.5,16h-3c-0.828,0-1.5,0.672-1.5,1.5s0.672,1.5,1.5,1.5h3c0.828,0,1.5-0.672,1.5-1.5S34.328,16,33.5,16z     M28.561,26.439C28.289,26.168,27.914,26,27.5,26c-0.828,0-1.5,0.672-1.5,1.5c0,0.414,0.168,0.789,0.439,1.06l2,2    C28.711,30.832,29.086,31,29.5,31c0.828,0,1.5-0.672,1.5-1.5c0-0.414-0.168-0.789-0.439-1.061L28.561,26.439z M17.5,29    c-0.829,0-1.5,0.672-1.5,1.5v3c0,0.828,0.671,1.5,1.5,1.5s1.5-0.672,1.5-1.5v-3C19,29.672,18.329,29,17.5,29z M17.5,7    C11.71,7,7,11.71,7,17.5S11.71,28,17.5,28S28,23.29,28,17.5S23.29,7,17.5,7z M17.5,25c-4.136,0-7.5-3.364-7.5-7.5    c0-4.136,3.364-7.5,7.5-7.5c4.136,0,7.5,3.364,7.5,7.5C25,21.636,21.636,25,17.5,25z"></path>
       </svg>
-      </label>
-      <label id="toggle-label-dark" for="darkmode-toggle">
       <svg
         xmlns="http://www.w3.org/2000/svg"
         xmlnsXlink="http://www.w3.org/1999/xlink"
@@ -41,7 +38,6 @@ const Darkmode: QuartzComponent = ({ displayClass, cfg }: QuartzComponentProps)
         <title>{i18n(cfg.locale).components.themeToggle.lightMode}</title>
         <path d="M96.76,66.458c-0.853-0.852-2.15-1.064-3.23-0.534c-6.063,2.991-12.858,4.571-19.655,4.571  C62.022,70.495,50.88,65.88,42.5,57.5C29.043,44.043,25.658,23.536,34.076,6.47c0.532-1.08,0.318-2.379-0.534-3.23  c-0.851-0.852-2.15-1.064-3.23-0.534c-4.918,2.427-9.375,5.619-13.246,9.491c-9.447,9.447-14.65,22.008-14.65,35.369  c0,13.36,5.203,25.921,14.65,35.368s22.008,14.65,35.368,14.65c13.361,0,25.921-5.203,35.369-14.65  c3.872-3.871,7.064-8.328,9.491-13.246C97.826,68.608,97.611,67.309,96.76,66.458z"></path>
       </svg>
-      </label>
     </button>
   )
 }

quartz/components/styles/darkmode.scss

@@ -1,14 +1,15 @@
 .darkmode {
+  cursor: pointer;
+  padding: 0;
   position: relative;
   background: none;
   border: none;
   width: 20px;
   height: 20px;
   margin: 0 10px;
+  text-align: inherit;
 
   & svg {
-    cursor: pointer;
-    opacity: 0;
     position: absolute;
     width: 20px;
     height: 20px;
@@ -26,7 +27,7 @@
   color-scheme: light;
 }
 
-:root[saved-theme="dark"] .toggle ~ label {
+:root[saved-theme="dark"] .darkmode {
   & > #dayIcon {
     display: none;
   }
@@ -35,7 +36,7 @@
   }
 }
 
-:root .toggle ~ label {
+:root .darkmode {
   & > #dayIcon {
     display: inline;
   }