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

/* Container */
.boosts {
  --boost-border-color: var(--color-border-dark);
}

/* Item */
.boost {
  border: 1px solid var(--boost-border-color);
  border-radius: 4rem;
  margin-block-start: calc(var(--block-space-half) / 2);
  opacity: 1;
  padding: 0.1em 0.2em 0.1em 0.1em;
  transition: opacity 100ms ease-in-out, box-shadow 150ms ease-in-out, transform 150ms ease-in-out;

  .boost__action {
    margin-block-start: 0;
  }

  .btn:not(.avatar) {
    font-size: 0.55rem;
  }

  @media (any-hover: hover) {
    &:where(:not(:active):hover) {
      --boost-border-color: var(--color-border-darker);

      box-shadow: 0 0 0 var(--hover-size) var(--hover-color);
    }
  }

  &:has(.input--boost):focus-within {
    --boost-border-color: var(--color-selected-dark);
    --hover-color: var(--color-selected-dark);

    box-shadow: 0 0 0 var(--hover-size) var(--hover-color);
  }
}

.btn:is(.boost__action) {
  --btn-border-color: var(--boost-border-color);

  font-size: 0.66em;
  margin-block-start: calc(var(--block-space-half) / 2);

  @media (any-hover: hover) {
    &:where(:not(:active):hover) {
      --boost-border-color: var(--color-border-darker)
    }
  }
}

.btn:is(.boost__delete) {
  display: none;

  .expanded & {
    display: flex;
  }
}

.boost__avatar {
  --avatar-size: 2.2ch;

  inline-size: auto;
}

.boost__form {
  transition: none;

  &.expanded {
    animation: boost 0.2s both;
    transform: translate3d(0, 0, 0);
  }

  .boost__form-label:focus {
    outline: none;
  }

  .input--boost {
    --hover-size: 0;
    --input-background: transparent;
    --input-border-size: 0;
    --input-padding: 0;
    --outline-size: 0;

    box-shadow: none;
    display: inherit;
    max-inline-size: 16ch;
    min-inline-size: 2em;
    outline: 0;
  }
}

/* Variants */
.boost--deleting {
  animation: scale-fade-out 0.2s both;
}

/* Reactions */
.quick-boosts {
  display: grid;
  grid-template-columns: repeat(3, 2em);
}

.boost-character {
  font-size: 1.3rem;
}