metamask-extension/ui/components/app/signature-request-siwe/signature-request-siwe-message/index.scss

.signature-request-siwe-message {
  flex: 1 100%;
  border-radius: 8px;
  padding: 8px 16px;
  margin: 16px;
  border: 1px solid var(--color-border-muted);

  &__sub-text {
    white-space: pre-line;
    overflow: hidden;
    word-wrap: break-word;
  }
}