/***** START of Sample Rules (delete and replace with your your own rules) *****/

/*** Maximize Print Overlay Preview Size ***/

/* Allow panel to be taller */
.dialogBox.printDialogBox[sizeto="available"]{
  --box-ideal-height: 888 !important;
}
/* Remove side margins in narrower windows */
@media (max-width: 1280px) {
  .dialogBox.printDialogBox[sizeto="available"]{
    max-width: 100vw !important;
  }
}

/*** Audio Playing / Mute Button side-by-side when sound is playing ***/

#TabsToolbar {
    --user-mute-button-height: 20px;  /* default size is 12px, site icon is 16px */
}

/* Move the mute/unmute button to the right and enlarge it */
.tab-icon-overlay:not([pinned], [sharing], [crashed]):is([soundplaying], [muted]) {
    width: var(--user-mute-button-height) !important;
    height: var(--user-mute-button-height) !important;
    margin-left: calc(var(--user-mute-button-height) / 2 + 2px) !important; /* pushes icon to the right */
    margin-right: 2px !important; /* closes up some space before the text */
    padding: 0 !important; /* allows icon to expand to full size */
}

/* Move the site icon to the left a bit and adjust position */
.tab-icon-stack:not([pinned], [sharing], [crashed]):is([soundplaying], [muted]) > :not(.tab-icon-overlay) {
    margin-left: -4px !important; /* pushes icon to the left */
    margin-top: calc((var(--user-mute-button-height) - 16px) / 2) !important;  /* keep site icon reasonably positioned */
}

/* Override the rules for hover/not hover visibility */
   /* for mute button */
.tabbrowser-tab:not(:hover) .tab-icon-overlay:not([pinned], [sharing], [crashed]):is([soundplaying], [muted]), 
   /* for site icon */
.tabbrowser-tab:hover .tab-icon-stack:not([pinned], [sharing], [crashed]):is([soundplaying], [muted]) > :not(.tab-icon-overlay), 
   /* for site icon with Compact density */
:root[uidensity="compact"] .tab-icon-stack:not([pinned], [sharing], [crashed]):is([soundplaying], [muted]) > :not(.tab-icon-overlay) {
    opacity: 1 !important; /* overrides full transparency with full opacity */
}

/* Color the icon on hover for confirmation or avoidance */
.tab-icon-overlay:not([pinned], [sharing], [crashed]):is([soundplaying], [muted]):hover {
    fill: green !important;
}
[lwthemetextcolor="bright"] .tab-icon-overlay:not([pinned], [sharing], [crashed]):is([soundplaying], [muted]):hover {
    fill: lightgreen !important; /* for dark themes */
}

/***** END of Sample Rules *****/