zen-desktop/src/browser/base/content/zen-styles/zen-urlbar.css

/* URL and tool bars */

#urlbar {
  --toolbarbutton-border-radius: 999px;
  border: transparent;
  overflow: hidden;
  padding: 1px;
  border-radius: var(--toolbarbutton-border-radius);
}

#urlbar[focused="true"][breakout-extend="true"] {
  overflow: visible;
}

#urlbar {
  border: 1px solid light-dark(rgba(0,0,0,.2), rgba(255,255,255,.2))
}

#searchbar:focus-within {
  border-color: transparent !important;
}

#urlbar[focused="true"] {
  box-shadow: var(--panel-shadow) !important;
}

#urlbar[focused="true"] > #urlbar-background {
  background: var(--zen-dialog-background) !important;
}

#urlbar[focused="true"]:not([suppress-focus-border]) > #urlbar-background,
#searchbar:focus-within {
  outline: none !important;
  outline-offset: none !important;
  outline-color: none !important;
}

#urlbar .urlbar-page-action, 
#urlbar #tracking-protection-icon-container,
#urlbar:not([extend="true"]) #identity-box:not(.chromeUI) #identity-icon-box {
  border-radius: 999px;
}

#urlbar[breakout-extend="true"] {
  --toolbarbutton-border-radius: 6px;
}

#identity-icon-box {
  background: var(--zen-colors-secondary) !important;
}

#urlbar:is([focused], [open]) > #urlbar-background, #searchbar:focus-within {
  background: var(--urlbar-box-bgcolor);
}

#identity-icon-label {
  padding-inline-start: 8px  !important;
}

#urlbar #identity-box.chromeUI #identity-icon-box {
  border-radius: 5px !important;
}

#urlbar:not([breakout-extend="true"]) #identity-box.chromeUI #identity-icon-box {
  border-radius: 20px 10px 10px 20px !important;
}

#urlbar .urlbar-page-action,
#urlbar #identity-box #identity-icon-box, 
#urlbar #tracking-protection-icon-container {
  margin: 0 1px;
}

#urlbar:not([extend="true"]) #identity-box #identity-icon-box { position: relative;}

#urlbar:not([extend="true"]) #identity-box:not(.chromeUI):not(.localResource) #identity-icon-box {
  margin-right: 5px;
}

#urlbar:not([extend="true"]) #identity-box:not(.chromeUI):not(.localResource) {
  margin-inline-end: 0 !important;
}

.urlbar-page-action {
  width: calc(var(--urlbar-min-height) - 5px - 2 * var(--urlbar-container-padding)) !important;
  height: calc(var(--urlbar-min-height) - 5px - 2 * var(--urlbar-container-padding)) !important;
  padding: 0 !important;
  justify-content: center !important;
  align-items: center !important;
}

toolbar .toolbarbutton-1:not(.unified-extensions-item-action-button) {
  & > .toolbarbutton-icon,
  & > .toolbarbutton-badge-stack {
    width: calc(2 * var(--toolbarbutton-inner-padding) + 18px) !important;
    height: calc(2 * var(--toolbarbutton-inner-padding) + 18px) !important;
  }
}

toolbar .zen-sidebar-panel-button {
  & > .toolbarbutton-icon,
  & > .toolbarbutton-badge-stack {
    width: calc(2 * var(--toolbarbutton-inner-padding) + 20px) !important;
    height: calc(2 * var(--toolbarbutton-inner-padding) + 20px) !important;
  }
}

#identity-permission-box {
  margin: 0 5px 0 0 !important;
  border-top-left-radius: 0 !important;
  border-bottom-left-radius: 0 !important;
}

#identity-box:has(#identity-permission-box:is([hasPermissions], [hasSharingIcon])) #identity-icon-box {
  border-top-right-radius: 0 !important;
  border-bottom-right-radius: 0 !important;
  margin-right: 0 !important;
}

#tracking-protection-icon-container,
#page-action-buttons {
  order: 2 !important;
}

#notification-popup-box {
  border-radius: 999px;
  margin-right: 5px;
  transition: .2s;
  height: 100%;
  padding: 7px;
}

button.popup-notification-dropmarker {
  border-top-left-radius: 0 !important;
  border-bottom-left-radius: 0 !important;
}

.panel-footer:has(button.popup-notification-dropmarker:not([hidden="true"])) button.popup-notification-secondary-button {
  border-top-right-radius: 0 !important;
  border-bottom-right-radius: 0 !important;
}

.searchbar-engine-one-off-item {
  max-width: 20px;
  min-width: 20px !important;
  justify-content: center;
}

#downloadsHistory {
  margin-top: 5px
}