once-campfire/app/assets/stylesheets/avatars.css

.avatar {
  --avatar-border-radius: 50%;

  aspect-ratio: 1;
  border-radius: var(--avatar-border-radius);
  display: grid;
  inline-size: var(--avatar-size, 5ch);
  margin: 0;
  place-items: center;
  position: relative;

  img {
    aspect-ratio: 1;
    block-size: auto;
    border-radius: var(--avatar-border-radius);
    grid-area: 1/1;
    inline-size: var(--avatar-size, 5ch);
    max-inline-size: 100%;
    object-fit: cover;

    .banned & {
      opacity: 0.5;
    }
  }

  .banned &:after {
    background: url(cancel.svg) no-repeat center center;
    block-size: auto;
    content: "";
    filter: invert(0%);
    inline-size: var(--avatar-size, 5ch);
    inset: 0;
    max-inline-size: 100%;
    position: absolute;

    @media (prefers-color-scheme: dark) {
      filter: invert(100%);
    }
  }
}

.avatar--icon {
  border: 1px solid var(--color-border-darker);
  background-color: var(--color-text-reversed);

  img {
    background-color: transparent;
    border-radius: 0;
    inline-size: auto;
    margin: var(--inline-space);
  }

  @media (any-hover: hover) {
    &:where(:not(:active):hover) {
      box-shadow: 0 0 0 var(--hover-size) var(--hover-color);
    }
  }
}

.avatar__group {
  --avatar-size: 2.5ch;

  block-size: 5ch;
  display: grid;
  gap: 1px;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: min-content;
  inline-size: 5ch;
  place-content: center;

  .avatar {
    margin: auto;
  }

  &:where(:has(> :last-child:nth-child(2))) {
    --avatar-size: 3.5ch;

    > :first-child {
      margin-block-end: 1.5ch;
      margin-inline-end: -0.75ch;
    }

    > :last-child {
      margin-block-start: 1.5ch;
      margin-inline-start: -0.75ch;
    }
  }

  &:where(:has(> :last-child:nth-child(3))) {
    > :last-child {
      margin-inline: 1.25ch -1.25ch;
    }
  }
}

.avatar__form {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
}

/* Account logo */
.account-logo {
  --avatar-border-radius: 0.5em;

  #nav & {
    block-size: var(--btn-size);
    inline-size: auto;
  }
}