@import 'part:@lyra/base/theme/variables-style';

:root {
  --radio-label-height: 1rem;
  --radio-off-color: var(--brand-primary);
  --radio-color: var(--brand-primary);
  --radio-button-size: 1rem;
  --radio-top-offset: 0;
  --radio-focus-color: magenta;
  --radio-label-font-size: 1em;
  --radio-padding: 0.25em;
}

.root {
  user-select: none;
  position: relative;
  z-index: 1;
  vertical-align: middle;
  display: inline-block;
  box-sizing: border-box;
  width: 100%;
  height: var(--radio-label-height);
  margin: 0;
  padding: 0;
  padding-left: calc(var(--radio-button-size) + var(--radio-padding));
}

.isChecked {
  composes: root;
}

.unChecked {
  composes: root;
}

.isDisabled {
  opacity: 0.5;
  pointer-events: none;
}

.input {
  line-height: var(--radio-label-height);

  /* Hide input element, while still making it respond to focus. */
  position: absolute;
  width: 0;
  height: 0;
  margin: 0;
  padding: 0;
  opacity: 0;
  appearance: none;
  border: none;
}

.circleOutline {
  position: absolute;
  top: var(--radio-top-offset);
  left: 0;
  display: inline-block;
  box-sizing: border-box;
  width: var(--radio-button-size);
  height: var(--radio-button-size);
  margin: 0;
  cursor: default;
  overflow: hidden;
  border: 2px solid var(--radio-off-color);
  border-radius: 100%;
  z-index: 2;

  @nest .isChecked & {
    border: 2px solid var(--radio-color);
  }
}

.focusHelper {
  position: absolute;
  top: calc(var(--radio-button-size) * -0.25);
  left: calc(var(--radio-button-size) * -0.25);
  display: inline-block;
  box-sizing: border-box;
  width: calc(var(--radio-button-size) * 1.5);
  height: calc(var(--radio-button-size) * 1.5);
  border-radius: 50%;
  background-color: transparent;
  transform: scale(0.5);
  transition: background-color 0.1s linear, transform 0.15s linear;

  @nest .isFocused & {
    background-color: var(--focus-color);
    transform: scale(1);
  }

  @nest .root:active & {
    background-color: var(--focus-color);
    transform: scale(1);
  }
}

.tickOutline {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: transparent;
  transition-timing-function: linear;
  transition-duration: 0.2s;
  transition-property: background, transform;
  transform: scale(0.1);
  border-radius: 50%;

  @nest .isChecked & {
    background-color: var(--radio-color);
    transform: scale(0.7);
  }
}

.label {
  position: relative;
  cursor: default;
  font-size: var(--radio-label-font-size);
  line-height: var(--radio-label-height);
  margin: 0;
}