angutron/src/app/title-bar/title-bar.component.scss

#title-bar {
  user-select: none;
  -webkit-app-region: drag;
  cursor: default;
  display: flex;
  align-items: center;
  width: 100%;
  height: 31px;
  background-color: #191818;
  visibility: visible;
  &>.title {
    user-select: none;
    cursor: default;
    padding-left: 12px;
    font-family: "Segoe UI", Arial;
    font-size: 12px;
    color: rgb(255, 255, 255);
    flex: 1 1 0%;
  }
  &>.controls {
    user-select: none;
    cursor: default;
    display: flex;
    height: 32px;
    &>.minimize,
    &>.maximize,
    &>.close {
      user-select: none;
      -webkit-app-region: no-drag;
      cursor: default;
      width: 46px;
      height: 100%;
      line-height: 0;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    &>.minimize:hover,
    &>.maximize:hover {
      transition: background-color 0.1s ease 0s;
      background-color: rgba(255, 255, 255, 0.13);
    }
    &>.minimize:active,
    &>.maximize:active {
      background-color: rgba(255, 255, 255, 0.23);
    }
    &>.close:hover {
      transition: background-color 0.1s ease 0s;
      background-color: rgb(232, 17, 35);
    }
    &>.close:active {
      background-color: rgb(241, 112, 122);
    }
    &>.close:active>svg>polygon {
      fill: rgb(0, 0, 0);
    }
  }
}