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

.network-component--disabled {
  cursor: not-allowed;

  .fa-caret-down {
    opacity: 0;
  }
}

.network-component.pointer {
  border: 1px solid var(--Grey-200);
  border-radius: 82px;
  padding: 6px 3px;
  flex: 0 0 auto;
  display: flex;

  &.ethereum-network .menu-icon-circle div {
    background-color: rgba(3, 135, 137, 0.7) !important;
  }

  &.ropsten-test-network .menu-icon-circle div {
    background-color: rgba(233, 21, 80, 0.7) !important;
  }

  &.kovan-test-network .menu-icon-circle div {
    background-color: rgba(105, 4, 150, 0.7) !important;
  }

  &.rinkeby-test-network .menu-icon-circle div {
    background-color: rgba(235, 179, 63, 0.7) !important;
  }

  &.goerli-test-network .menu-icon-circle div {
    background-color: rgba(48, 153, 242, 0.7) !important;
  }

  &.localhost-network .menu-icon-circle div {
    background-color: rgba(3, 135, 137, 0.7) !important;
  }
}

.dropdown-menu-item {
  .menu-icon-circle,
  .menu-icon-circle--active {
    margin: 0 14px;
  }
}

.dropdown-menu-item .fa.delete {
  margin-right: 10px;
  display: none;
}

.dropdown-menu-item:hover .fa.delete {
  display: inherit;
}

.network-droppo {
  right: 2px;

  .color-indicator {
    margin: 0 14px;
  }

  @media screen and (min-width: $break-large) {
    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 {
  flex: 1;
  color: var(--dusty-gray);
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

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

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

.menu-icon-circle,
.menu-icon-circle--active {
  background: none;
  border-radius: 22px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px solid transparent;
  margin: 0 4px;
}

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

.menu-icon-circle div,
.menu-icon-circle--active div {
  height: 12px;
  width: 12px;
  border-radius: 17px;
}

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

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

.network-dropdown-list {
  max-height: 330px;
  overflow-y: auto;
  margin-bottom: 8px;
}

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

.network-dropdown-title {
  @include H4;

  height: 25px;
  width: 120px;
  color: var(--white);
  text-align: center;
}

.network-dropdown-content {
  @include H6;

  min-height: 36px;
  width: 265px;
  color: var(--dusty-gray);

  &--link {
    color: var(--white);
    cursor: pointer;
    text-decoration: underline;

    &:hover {
      color: var(--white);
    }
  }

  &--dismiss {
    color: inherit;
    background: inherit;
    position: absolute;
    top: 63px;
    right: 10px;
    border: 1px solid var(--dusty-gray);
    border-radius: 10px;
  }
}

.network-caret {
  margin: 0 8px;
}

.network-loading-spinner {
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  position: relative;
  height: 16px;
  width: 16px;
  margin-left: 5px;

  img {
    height: 26px;
    position: absolute;
    top: -5px;
    left: -6px;
  }
}