@media(prefers-color-scheme: dark) {
  .heading {
    color: #ffffff;
  }

  .stock-list {
    background-color: #000000;
  }

  .stock {
    color: #ffffff;
  }

  .stock-id-input {
    color: #f1f1f1;
    outline: none;
    background-color: #2f2f2f;
  }

  .news-title {
    color: #ffffff;
  }

  .news-text {
    color: #d7d6d6;
  }

  .news-source {
    color: #f1f1f1;
  }
}