opencode/packages/ui/src/components/icon-button.css

[data-component="icon-button"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  text-decoration: none;
  user-select: none;
  aspect-ratio: 1;
  flex-shrink: 0;

  &[data-variant="primary"] {
    background-color: var(--icon-strong-base);

    [data-slot="icon-svg"] {
      /* color: var(--icon-weak-base); */
      color: var(--icon-invert-base);

      /* &:hover:not(:disabled) { */
      /*   color: var(--icon-weak-hover); */
      /* } */
      /* &:active:not(:disabled) { */
      /*   color: var(--icon-strong-active); */
      /* } */
    }

    &:hover:not(:disabled) {
      background-color: var(--icon-strong-hover);
    }
    &:focus:not(:disabled) {
      background-color: var(--icon-strong-focus);
    }
    &:active:not(:disabled) {
      background-color: var(--icon-strong-active);
    }
    &:disabled {
      background-color: var(--icon-strong-disabled);

      [data-slot="icon-svg"] {
        color: var(--icon-invert-base);
      }
    }
  }

  &[data-variant="secondary"] {
    border: transparent;
    background-color: var(--button-secondary-base);
    color: var(--text-strong);
    box-shadow: var(--shadow-xs-border-base);

    &:hover:not(:disabled) {
      background-color: var(--button-secondary-hover);
    }
    &:focus:not(:disabled) {
      background-color: var(--button-secondary-base);
    }
    &:focus-visible:not(:active) {
      background-color: var(--button-secondary-base);
      box-shadow: var(--shadow-xs-border-focus);
    }
    &:focus-visible:active {
      box-shadow: none;
    }
    &:active:not(:disabled) {
      background-color: var(--button-secondary-base);
    }

    [data-slot="icon-svg"] {
      color: var(--icon-strong-base);
    }

    &:disabled {
      background-color: var(--icon-strong-disabled);
      color: var(--icon-invert-base);
      cursor: not-allowed;
    }
  }

  &[data-variant="ghost"] {
    background-color: transparent;
    /* color: var(--icon-base); */

    [data-slot="icon-svg"] {
      color: var(--icon-base);
    }

    &:hover:not(:disabled) {
      background-color: var(--surface-base-hover);

      /* [data-slot="icon-svg"] { */
      /*   color: var(--icon-hover); */
      /* } */
    }
    &:focus-visible:not(:disabled) {
      background-color: var(--surface-base-hover);
    }
    &:active:not(:disabled) {
      background-color: var(--surface-base-active);
      /* [data-slot="icon-svg"] { */
      /*   color: var(--icon-active); */
      /* } */
    }
    &:selected:not(:disabled) {
      background-color: var(--surface-base-active);
      /* [data-slot="icon-svg"] { */
      /*   color: var(--icon-selected); */
      /* } */
    }
    &:disabled {
      color: var(--icon-invert-base);
      cursor: not-allowed;
    }
  }

  &[data-size="normal"] {
    width: 24px;
    height: 24px;

    font-size: var(--font-size-small);
    line-height: var(--line-height-large);
    gap: calc(var(--spacing) * 0.5);
  }

  &[data-size="small"] {
    width: 20px;
    height: 20px;
  }

  &[data-size="large"] {
    height: 32px;
    /* padding: 0 8px 0 6px; */
    gap: 8px;

    /* text-12-medium */
    font-family: var(--font-family-sans);
    font-size: var(--font-size-small);
    font-style: normal;
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-large); /* 166.667% */
    letter-spacing: var(--letter-spacing-normal);
  }

  &:focus {
    outline: none;
  }
}

@media (prefers-reduced-motion: no-preference) {
  [data-component="icon-button"][data-icon="stop"] [data-slot="icon-svg"] rect {
    transform-origin: center;
    transform-box: fill-box;
    animation: stop-pulse 1.8s ease-in-out infinite;
  }
}

@keyframes stop-pulse {
  0%,
  100% {
    transform: scale(0.95);
  }
  50% {
    transform: scale(1.12);
  }
}

[data-component="icon-button"].titlebar-icon {
  width: 32px;
  height: 24px;
  aspect-ratio: auto;
}

[data-component="icon-button"].titlebar-icon[data-variant="ghost"][aria-expanded="true"] {
  background-color: var(--surface-raised-base-active);
}

[data-component="icon-button"].titlebar-icon[data-variant="ghost"][aria-expanded="true"] [data-slot="icon-svg"] {
  color: var(--icon-strong-base);
}

[data-component="icon-button"].titlebar-icon[data-variant="ghost"][aria-expanded="true"]:hover:not(:disabled) {
  background-color: var(--surface-raised-base-active);
}