papercss/src/cards.less

.card {
  .shadow;

  position: relative;
  display: flex;
  flex-direction: column;
  word-wrap: break-word;
  border: 2px solid @muted-light;

  .card-body {
    flex: 1 1 auto;
    padding: 1.25rem;

    .card-title, h4 {
      margin-top: 0;
      margin-bottom: 0.5rem;
    }

    .card-subtitle, h5 {
      .text-secondary;

      margin-top: 0;
      margin-bottom: 0.5rem;
    }

    .card-text, p {
      margin-top: 0;
      margin-bottom: 1rem;
    }

    .card-link + .card-link,
    a + a {
      margin-left: 1.25rem;
    }
  }

  .image-top,
  .image-bottom,
  img {
    border: 0;
    border-radius: 0;
  }
}