/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/tab_line_loading_indicator.css made available under Mozilla Public License v. 2.0
See the above repository for updates as well as full license text. */

/* Hide the normal loading indicator (just show tab-icon instead) and make the top tab-line bounce left-to-right */

@keyframes tabline-anim{from{background-position-x: left}to{background-position-x: right}}
.tab-line{ 
  transform: none !important;
  background-color: transparent !important;
  background-image: linear-gradient(rgba(255,255,255,.2),rgba(255,255,255,.2));
  background-repeat: no-repeat !important;
  background-size: 100%;
  transition: background-size 80ms linear !important;
}

.tabbrowser-tab[busy] > stack > .tab-background > .tab-line{
  background-size: 10% !important;
  background-image: linear-gradient(var(--tab-line-color),var(--tab-line-color));
  opacity: 0.7 !important;
  animation: tabline-anim 400ms alternate infinite ease-in-out;
}

.tab-line[selected]{ background-image: linear-gradient(var(--tab-line-color),var(--tab-line-color)); opacity: 1 !important; }

.tabbrowser-tab .tab-throbber{ display: none }
.tabbrowser-tab .tab-icon-image{ display: -moz-box !important; }