theme-store/themes/f4866f39-cfd6-4498-ab92-54213b8279dc/chrome.css

/* Base styles for pinned tab backgrounds (zen-essential="false") Animations */
.tabbrowser-tab[pinned]:not([zen-essential="false"]) .tab-stack .tab-background {
    transition: background-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

/* Hover state (zen-essential="false") */
.tabbrowser-tab[pinned]:not([zen-essential="false"]):hover .tab-stack .tab-background {
    transition: background-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

/* Selected state (zen-essential="false") */
.tabbrowser-tab[pinned]:not([zen-essential="false"])[selected="true"] .tab-stack .tab-background,
.tabbrowser-tab[pinned]:not([zen-essential="false"])[multiselected="true"] .tab-stack .tab-background {
    transition: background-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

/* Selected and hovering state (zen-essential="false") */
.tabbrowser-tab[pinned]:not([zen-essential="false"])[selected="true"]:hover .tab-stack .tab-background,
.tabbrowser-tab[pinned]:not([zen-essential="false"])[multiselected="true"]:hover .tab-stack .tab-background {
    transition: background-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

/* Base styles for pinned tab backgrounds (zen-essential="true") */
.tabbrowser-tab[pinned][zen-essential="true"] .tab-stack .tab-background {
    transition: background-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

/* Hover state (zen-essential="true") */
.tabbrowser-tab[pinned][zen-essential="true"]:hover .tab-stack .tab-background {
    transition: background-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

/* Selected state (zen-essential="true") */
.tabbrowser-tab[pinned][zen-essential="true"][selected="true"] .tab-stack .tab-background,
.tabbrowser-tab[pinned][zen-essential="true"][multiselected="true"] .tab-stack .tab-background {
    transition: background-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

/* Selected and hovering state (zen-essential="true") */
.tabbrowser-tab[pinned][zen-essential="true"][selected="true"]:hover .tab-stack .tab-background,
.tabbrowser-tab[pinned][zen-essential="true"][multiselected="true"]:hover .tab-stack .tab-background {
    transition: background-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

/* Transition properties for tab background */
.tab-background {
    transition: background-color 0.4s ease, box-shadow 0.4s ease, background 0.5s ease;
}

/* For toolbarbutton-1 */
toolbar .toolbarbutton-1 {
  &:not([disabled]) {
    /* Add transition for background and outline color changes */
    &:hover > :is(.toolbarbutton-icon, .toolbarbutton-text, .toolbarbutton-badge-stack) {
      transition: background-color 0.3s ease-in-out, 
                  outline-color 0.3s ease-in-out; /* Smooth transition */
    }

/* Ensure the default state also includes the transition for smooth exit */
    > :is(.toolbarbutton-icon, .toolbarbutton-text, .toolbarbutton-badge-stack) {
      transition: background-color 0.3s ease-in-out, 
                  outline-color 0.3s ease-in-out;
    }
  }
}

/* For identity-box-button and tracking-protection-icon-container */
.identity-box-button, 
#tracking-protection-icon-container {
  /* Transition only for animating properties (without color changes) */
  transition: background-color 0.3s ease-in-out, 
              outline-color 0.3s ease-in-out;
}

.identity-box-button:hover:not([open="true"]), 
#tracking-protection-icon-container:hover:not([open="true"]) {
  /* Only animate background and outline changes (no color changes) */
  transition: background-color 0.3s ease-in-out, 
              outline-color 0.3s ease-in-out;
}

#navigator-toolbox[zen-sidebar-expanded="true"] {
  & #TabsToolbar-customization-target {
    & > :not(tabs):not(#search-container):not(#zen-workspaces-button), 
    & #tabbrowser-arrowscrollbox-periphery > toolbarbutton {
      /* Apply the transition to animate the background and outline */
      transition: background-color 0.3s ease-in-out, outline-color 0.3s ease-in-out;

}
  }
}

@media not (forced-colors) {
  .close-icon {
    transition: background-color 0.3s ease-in-out; /* Smooth transition for background-color */
  }

}

@media not (forced-colors) {
  .tab-reset-button {
    transition: background-color 0.3s ease-in-out; /* Smooth transition for background-color */
  }

}

:is(panelview .toolbarbutton-1, 
    toolbarbutton.subviewbutton, 
    .widget-overflow-list .toolbarbutton-1, 
    .toolbaritem-combined-buttons:is(:not([cui-areatype="toolbar"]), [overflowedItem="true"]) > toolbarbutton) {
  
  /* Ensure smooth animation */
  transition: background-color 0.3s ease-in-out; /* Add transition for smooth background change */
  
}

.urlbarView-row {
  /* Add transition to the background-color for smooth animation */
  transition: background-color 0.3s ease-in-out; /* Smooth background color change */
}

:is(panelview .toolbarbutton-1, 
    toolbarbutton.subviewbutton, 
    .widget-overflow-list .toolbarbutton-1, 
    .toolbaritem-combined-buttons:is(:not([cui-areatype="toolbar"]), [overflowedItem="true"]) > toolbarbutton) {

/* Add transition to background-color for smooth animation */
  transition: background-color 0.3s ease-in-out;

}

/* Define the general transition for the background color */
@media (-moz-bool-pref: "zen.tabs.vertical") {
  #navigator-toolbox:is(#navigator-toolbox[zen-user-hover="true"][zen-has-hover], 
                        #navigator-toolbox[zen-user-hover="true"]:focus-within, 
                        #navigator-toolbox[zen-user-hover="true"][movingtab], 
                        #navigator-toolbox[zen-user-hover="true"][flash-popup], 
                        #navigator-toolbox[zen-user-hover="true"][has-popup-menu], 
                        #navigator-toolbox[zen-user-hover="true"]:has([open="true"]:not(tab):not(.zen-compact-mode-ignore)), 
                        #navigator-toolbox[zen-expanded="true"]:not([zen-user-hover="true"])) {
    
    #TabsToolbar-customization-target {
      & > :not(tabs):not(#search-container):not(#zen-workspaces-button), 
      & #tabbrowser-arrowscrollbox-periphery > toolbarbutton {

/* Add transition for background-color */
        transition: background-color 0.3s ease-in-out;

}
    }
  }
}