metamask-extension/ui/app/css/itcss/components/network.scss

.network-indicator {
  display: flex;
  align-items: center;
  font-size: .6em;
}

.network-name {
  line-height: 12px;
  padding: 0 4px;
  font-family: 'DIN OT';
  font-size: 10px;
  flex: 1 0 auto;
}

.network-droppo {
  right: 2px;

  @media screen and (min-width: 576px) {
    right: calc(((100% - 85vw) / 2) + 2px);
  }

  @media screen and (min-width: 769px) {
    right: calc(((100% - 80vw) / 2) + 2px);
  }

  @media screen and (min-width: 1281px) {
    right: calc(((100% - 65vw) / 2) + 2px);
  }
}

.network-name-item {
  font-weight: 100;
  flex: 1 0 auto;
  color: $dusty-gray;
}

.network-check,
.network-check__transparent {
  color: $white;
  margin-left: 7px;
}

.network-check__transparent {
  opacity: 0;
  width: 16px;
  margin: 0;
}

.menu-icon-circle, .menu-icon-circle--active {
  height: 23px;
  width: 23px;
  margin: 9px;
  background: none;
  border-radius: 22px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px solid transparent;
  background: none;
}

.menu-icon-circle--active {
  border: 1px solid white;
  background: rgba(100, 100, 100, 0.4);
}

.menu-icon-circle div, .menu-icon-circle--active div {
  height: 17px;
  width: 17px;
  border-radius: 17px;
  opacity: 0.7;
}

.menu-icon-circle--active div {
  opacity: 1;
}

.network-dropdown-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.network-dropdown-divider {
  width: 100%;
  height: 1px;
  margin: 10px 0;
  background-color: $scorpion;
}

.network-dropdown-title {
  height: 25px;
  width: 75px;
  color: $white;
  font-family: 'DIN OT';
  font-size: 18px;
  line-height: 25px;
  text-align: center;
}

.network-dropdown-content {
  height: 36px;
  width: 265px;
  color: $dusty-gray;
  font-family: 'DIN OT';
  font-size: 14px;
  line-height: 18px;
}