ShadowFox/userContent-files/webextension-tweaks/brief.css

/*! Alters the webextension Brief
  IMPORTANT: change the Internal UUID */

@-moz-document url-prefix("moz-extension://brief_UUID/") {
  h2 {
    color: var(--primary-accent-color) !important;
  }
  label {
    color: var(--primary-light-color) !important;
  }

  #custom-style-textbox,
  input[type="number"],
  #clear-all-entries {
    -moz-appearance: none !important;
    background: var(--mid-way-color) !important;
    color:  var(--primary-light-color) !important;
    border: 1px solid var(--light-accent-color) !important;
  }

  #clear-all-entries {
    border-radius: 3px !important;
    -moz-appearance: none !important;
    background: var(--dark-accent) !important;
    color:  var(--primary-light-color) !important;
    border: 1px solid var(--mid-way-color) !important;
  }



}