/* .fd-check goes on a real checkbox and .fd-radio on a real radio. Wrap either with
   its text in a <label class="fd-choice">. They need no JavaScript. */
.fd-choice {
  display: inline-flex;
  align-items: center;
  gap: var(--fd-gap);
  color: var(--fd-ink);
  font: var(--fd-weight-regular) var(--fd-font-size) / var(--fd-line-height) var(--fd-font-sans);
  cursor: pointer;
}

.fd-choice:has(:disabled) {
  opacity: 0.5;
  cursor: not-allowed;
}

.fd-check,
.fd-radio {
  --_box: calc(var(--fd-icon) + 1px);
  --_dots: color-mix(in srgb, currentColor var(--fd-dither-hover-ink), transparent);
  appearance: none;
  position: relative;
  flex: none;
  box-sizing: border-box;
  width: var(--_box);
  height: var(--_box);
  margin: 0;
  background-color: var(--fd-surface-1);
  box-shadow: inset 0 0 0 1px var(--fd-edge);
  color: var(--fd-ink);
  cursor: inherit;
  transition:
    background-color var(--fd-spring-quick),
    box-shadow var(--fd-spring-quick);
}

.fd-check {
  border-radius: 3px;
}

.fd-radio {
  border-radius: 50%;
}

.fd-check:hover:not(:checked, :indeterminate, :disabled),
.fd-radio:hover:not(:checked, :disabled) {
  background-image: repeating-conic-gradient(var(--_dots) 0 25%, transparent 0 50%);
  background-size: calc(var(--fd-dither-hover-cell) * 2) calc(var(--fd-dither-hover-cell) * 2);
}

.fd-check:focus-visible,
.fd-radio:focus-visible {
  outline: 1px solid var(--fd-focus);
  outline-offset: 2px;
}

.fd-check:checked,
.fd-check:indeterminate,
.fd-radio:checked {
  background-color: var(--fd-ink);
  box-shadow: inset 0 0 0 1px var(--fd-ink);
  color: var(--fd-on-solid);
}

/* One 2px cell, with the mark drawn as shadows of it. */
.fd-check:checked::before,
.fd-check:indeterminate::before {
  content: '';
  position: absolute;
  width: 2px;
  height: 2px;
}

.fd-check:checked::before {
  left: calc((var(--_box) - var(--fd-glyph-tick-width)) / 2);
  top: calc((var(--_box) - var(--fd-glyph-tick-height)) / 2);
  box-shadow: var(--fd-glyph-tick);
}

.fd-check:indeterminate::before {
  left: calc((var(--_box) - var(--fd-glyph-dash-width)) / 2);
  top: calc((var(--_box) - var(--fd-glyph-dash-height)) / 2);
  box-shadow: var(--fd-glyph-dash);
}

.fd-radio:checked::before {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  width: 40%;
  height: 40%;
  border-radius: 50%;
  background-color: currentColor;
}

/* .fd-check-group holds .fd-choice rows. Rows checked side by side join into one shape. */
.fd-check-group {
  display: flex;
  flex-direction: column;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.fd-check-group > .fd-choice {
  display: flex;
  padding: 7px 10px;
  border-radius: var(--fd-radius-control);
  transition:
    background-color var(--fd-spring-glide),
    border-radius var(--fd-spring-glide);
}

.fd-check-group > .fd-choice:has(:checked) {
  background-color: var(--fd-soft);
}

.fd-check-group > .fd-choice:has(:checked) + .fd-choice:has(:checked) {
  border-start-start-radius: 0;
  border-start-end-radius: 0;
}

.fd-check-group > .fd-choice:has(:checked):has(+ .fd-choice :checked) {
  border-end-start-radius: 0;
  border-end-end-radius: 0;
}