torConnectTitlebarStatus.css

#tor-connect-titlebar-status:not([hidden]) {
  display: flex;
  align-items: center;
  /* Want same as #private-browsing-indicator-with-label */
  margin-inline: 7px;
}

#tor-connect-titlebar-status-label {
  margin-inline: 6px;
  white-space: nowrap;
}

#tor-connect-titlebar-status img {
  -moz-context-properties: fill, stroke;
  fill: currentColor;
  stroke: currentColor;
  width: 16px;
  height: 16px;
  object-fit: none;
  --num-animation-steps: 8;
  /* First frame has no offset. */
  --tor-not-connected-offset: 0;
  /* Each frame/step is offset by 20px from the previous. */
  --tor-connected-offset: calc(-20px * var(--num-animation-steps));
  object-position: var(--tor-not-connected-offset);
}

#tor-connect-titlebar-status.tor-connect-status-potentially-blocked img {
  /* NOTE: context-stroke is only used for the first "frame" for the slash. When
   * we assign the potentially-blocked class, we do *not* expect to be connected
   * at the same time, so we only expect this first frame to be visible in this
   * state. */
  stroke: #c50042;
}

@media (prefers-color-scheme: dark) {
  #tor-connect-titlebar-status.tor-connect-status-potentially-blocked img {
    stroke: #ff9aa2;
  }
}

#tor-connect-titlebar-status.tor-connect-status-connected img {
  object-position: var(--tor-connected-offset);
}

#tor-connect-titlebar-status.tor-connect-status-connected {
  color: var(--purple-60);
}

@media (prefers-color-scheme: dark) {
  #tor-connect-titlebar-status.tor-connect-status-connected {
    color: var(--purple-30);
  }
}

@keyframes onion-not-connected-to-connected {
  from {
    object-position: var(--tor-not-connected-offset);
  }

  to {
    object-position: var(--tor-connected-offset);
  }
}

@media (prefers-reduced-motion: no-preference) {
  #tor-connect-titlebar-status.tor-connect-status-connected.tor-connect-status-animate-transition {
    transition: color 1000ms;
  }

  #tor-connect-titlebar-status.tor-connect-status-connected.tor-connect-status-animate-transition img {
    animation-name: onion-not-connected-to-connected;
    animation-delay: 200ms;
    animation-fill-mode: both;
    /* Run animation at 60 frames-per-second. */
    animation-duration: calc(var(--num-animation-steps) * 1000ms / 60);
    animation-timing-function: steps(var(--num-animation-steps));
  }
}