:host {
  display: inline-flex;
  vertical-align: middle;
}

.nui-checkbox {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

.nui-checkbox[disabled] {
  cursor: not-allowed;
}

.nui-checkbox-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: inherit;
  z-index: 1;
}

.nui-checkbox-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  border: var(--border-width) solid var(--nui-card-border);
  border-radius: var(--border-radius-sm);
  background: transparent;
  color: var(--nui-primary-white-text-color);
  transition:
    background var(--transition-fast) ease,
    border-color var(--transition-fast) ease,
    color var(--transition-fast) ease;
  box-sizing: border-box;
  pointer-events: none;
}

.nui-checkbox[size="small"] .nui-checkbox-box {
  width: 1rem;
  height: 1rem;
}

.nui-checkbox[size="large"] .nui-checkbox-box {
  width: 1.5rem;
  height: 1.5rem;
}

.nui-checkbox-box[checked],
.nui-checkbox-box[indeterminate] {
  background: var(--nui-primary-color);
  border-color: var(--nui-primary-color);
}

.nui-checkbox-box[invalid]:not([checked]):not([indeterminate]) {
  border-color: var(--nui-danger-color);
}

.nui-checkbox-box[disabled] {
  opacity: 0.65;
}

.nui-checkbox-icon {
  display: inline-flex;
  flex-shrink: 0;
  line-height: 0;
  --nui-icon-width: 0.875em;
  --nui-icon-height: 0.875em;
}

.nui-checkbox-input:focus-visible + .nui-checkbox-box {
  outline: var(--border-width-focus) solid var(--nui-primary-focus-color);
  outline-offset: var(--outline-offset);
}