fizzy/app/assets/stylesheets/attachments.css

@layer components {
  .attachment {
    block-size: auto;
    display: block;
    inline-size: fit-content;
    max-inline-size: 100%;
    position: relative;

    progress {
      inline-size: 100%;
      margin: auto;
    }
  }

  .attachment__caption {
    color: color-mix(in oklch, var(--color-ink) 66%, transparent);
    font-size: var(--text-small);

    textarea {
      --input-border-radius: 0.3em;
      --input-border-size: 0;
      --input-padding: 0;

      background-color: var(--input-background, transparent);
      border: none;
      color: inherit;
      inline-size: 100%;
      max-inline-size: 100%;
      resize: none;
      text-align: center;

      &:focus {
        --focus-ring-size: 0;
      }

      @supports (field-sizing: content) {
        field-sizing: content;
        inline-size: 100%;
      }
    }
  }

  .attachment__icon {
    aspect-ratio: 4/5;
    background-color: color-mix(var(--attachment-icon-color), transparent 90%);
    block-size: 2.5lh;
    border: 2px solid var(--attachment-icon-color);
    border-block-start-width: 1ch;
    border-radius: 0.5ch;
    box-sizing: border-box;
    color: var(--attachment-icon-color);
    display: grid;
    font-size: var(--text-small);
    font-weight: bold;
    inline-size: auto;
    padding-inline: 0.5ch;
    place-content: center;
    text-transform: uppercase;
    white-space: nowrap;
  }

  .attachment--preview {
    margin-inline: auto;
    text-align: center;

    img, video {
      block-size: auto;
      display: block;
      margin-inline: auto;
      max-inline-size: 100%;
      user-select: none;
    }

    > a {
      display: block;
    }

    .attachment__caption {
      column-gap: 0.5ch;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      margin-block-start: 0.5ch;
    }
  }

  .attachment--file {
    --attachment-icon-color: var(--color-ink-medium);

    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 1ch;
    inline-size: 100%;
    margin-inline: 0;

    .attachment__caption {
      display: grid;
      flex: 1;
      text-align: start;
    }

    .attachment__name {
      color: var(--color-ink);
      font-weight: bold;
    }

    /* Video attachments don't have an identifiable class, but we need to
     * make sure the caption is always below the video */
    &:has(video) {
      .attachment__caption {
        flex: none;
        inline-size: 100%;
      }
    }
  }

  .attachment--psd,
  .attachment--key,
  .attachment--sketch,
  .attachment--ai,
  .attachment--eps,
  .attachment--indd,
  .attachment--svg,
  .attachment--ppt,
  .attachment--pptx {
    --attachment-icon-color: oklch(var(--lch-red-medium));
  }

  .attachment--css,
  .attachment--crash,
  .attachment--php,
  .attachment--json,
  .attachment--htm,
  .attachment--html,
  .attachment--rb,
  .attachment--erb,
  .attachment--ts,
  .attachment--js {
    --attachment-icon-color: oklch(var(--lch-purple-medium));
  }

  .attachment--txt,
  .attachment--pages,
  .attachment--rtf,
  .attachment--md,
  .attachment--doc,
  .attachment--docx {
    --attachment-icon-color: oklch(var(--lch-blue-medium));
  }

  .attachment--csv &,
  .attachment--numbers &,
  .attachment--xls &,
  .attachment--xlsx & {
    --attachment-icon-color: oklch(var(--lch-green-medium));
  }

  .attachment__link {
    color: var(--color-link);
    text-decoration: underline;
  }

  /* Custom attachments such as mentions, etc. */
  action-text-attachment[content-type^='application/vnd.actiontext'] {
    --attachment-bg-color: transparent;
    --attachment-image-size: 1em;
    --attachment-text-color: currentColor;

    align-items: center;
    background: var(--attachment-bg-color);
    border-radius: 99rem;
    box-shadow:
      -0.25ch 0 0 var(--attachment-bg-color),
       0.5ch 0 0 var(--attachment-bg-color);
    color: var(--attachment-text-color);
    display: inline-flex;
    gap: 0.25ch;
    margin: 0;
    padding: 0;
    position: relative;
    vertical-align: bottom;
    white-space: normal;

    lexxy-editor & {
      cursor: pointer;
    }

    img {
      block-size: var(--attachment-image-size);
      border-radius: 50%;
      inline-size: var(--attachment-image-size);
    }

    &.node--selected {
      --attachment-bg-color: oklch(var(--lch-blue-dark));
      --attachment-text-color: var(--color-ink-inverted);
    }
  }

  action-text-attachment[content-type^='application/vnd.actiontext.mention'] {
    img {
      object-fit: cover;
    }
  }
}