metamask-extension/ui/components/app/modals/export-private-key-modal/index.scss

.export-private-key-modal {
  &__divider {
    width: 100%;
    height: 1px;
    margin: 19px 0 8px 0;
    background-color: var(--color-border-default);
  }

  &__password::-webkit-input-placeholder {
    color: var(--color-text-muted);
  }

  &__private-key-display {
    height: 80px;
    width: 291px;
    overflow: hidden;
    overflow-wrap: break-word;
  }

  .ellip-address-wrapper {
    max-width: 286px;
    direction: ltr;
    overflow: hidden;
    text-overflow: ellipsis;
  }
}