pleroma-fe/src/components/settings_modal/tabs/appearance_tab.scss

.appearance-tab {
  .palette,
  .theme-notice {
    padding: 0.5em;
    margin: 1em;
  }

  .setting-item {
    padding-bottom: 0;

    &.heading {
      display: grid;
      align-items: baseline;
      grid-template-columns: 1fr auto auto auto;
      grid-gap: 0.5em;

      h2 {
        flex: 1 0 auto;
      }
    }
  }

  .palettes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-gap: 0.5em;

    h4,
    .unsupported-theme-v2,
    .userPalette {
      grid-column: 1 / span 2;
    }
  }

  .palette-entry {
    display: flex;
    align-items: center;

    > label {
      flex: 1 0 auto;
    }

    .palette-square {
      flex: 0 0 auto;
      display: inline-block;
      min-width: 1em;
      min-height: 1em;
    }
  }

  .column-settings {
    display: flex;
    justify-content: space-evenly;
    flex-wrap: wrap;
  }

  .column-settings .size-label {
    display: block;
    margin-bottom: 0.5em;
    margin-top: 0.5em;
  }

  .theme-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    margin: -0.5em 0;
    height: 25em;
    overflow-x: hidden;
    overflow-y: auto;
    scrollbar-gutter: stable;
    border-radius: var(--roundness);
    border: 1px solid var(--border);
    padding: 0;
    margin-bottom: 1em;

    .theme-preview {
      font-size: 1rem; // fix for firefox
      width: 19rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      margin: 0.5em;

      &.placeholder {
        opacity: 0.2;
      }

      .theme-preview-container {
        pointer-events: none;
        zoom: 0.5;
        border: none;
        border-radius: var(--roundness);
        text-align: left;
      }
    }
  }
}