/* -------------------------------- 

File#: _1_custom-checkbox
Title: Custom Checkbox
Descr: Replace the native checkbox button with a custom element (e.g., an icon)
Usage: codyhouse.co/license

-------------------------------- */
:root {
  --custom-checkbox-size: 20px;
  --custom-checkbox-radius: 4px;
  --custom-checkbox-border-width: 1px;
  --custom-checkbox-marker-size: 18px;
}

.custom-checkbox {
  position: relative;
  z-index: 1;
  display: inline-block;
  font-size: var(--custom-checkbox-size);
}

.custom-checkbox__input {
  position: relative;
  /* hide native input */
  margin: 0;
  padding: 0;
  opacity: 0;
  height: 1em;
  width: 1em;
  display: block;
  z-index: 1;
}

.custom-checkbox__control {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -1;
  pointer-events: none;
  transition: -webkit-transform 0.2s;
  transition: transform 0.2s;
  transition: transform 0.2s, -webkit-transform 0.2s;
  color: hsla(var(--color-contrast-low-h), var(--color-contrast-low-s), var(--color-contrast-low-l), 0.65);
  /* unchecked color */
}
.custom-checkbox__control::before, .custom-checkbox__control::after {
  content: "";
  position: absolute;
}
.custom-checkbox__control::before {
  /* focus circle */
  width: 160%;
  height: 160%;
  background-color: currentColor;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%) scale(0);
          transform: translate(-50%, -50%) scale(0);
  opacity: 0;
  border-radius: 50%;
  will-change: transform;
  transition: -webkit-transform 0.2s;
  transition: transform 0.2s;
  transition: transform 0.2s, -webkit-transform 0.2s;
}
.custom-checkbox__control::after {
  /* custom checkbox */
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* custom checkbox style */
  background-color: var(--color-bg);
  border-radius: var(--custom-checkbox-radius);
  box-shadow: inset 0 0 0 var(--custom-checkbox-border-width) currentColor, var(--shadow-xs);
  /* border */
}

.custom-checkbox__input:checked ~ .custom-checkbox__control::after,
.custom-checkbox__input:indeterminate ~ .custom-checkbox__control::after {
  background-color: currentColor;
  background-repeat: no-repeat;
  background-position: center;
  background-size: var(--custom-checkbox-marker-size);
  box-shadow: none;
}

.custom-checkbox__input:checked ~ .custom-checkbox__control {
  color: var(--color-primary);
  /* checked color */
}
.custom-checkbox__input:checked ~ .custom-checkbox__control::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpolyline points='2.5 8 6.5 12 13.5 3' fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5'/%3E%3C/svg%3E");
}

.custom-checkbox__input:indeterminate ~ .custom-checkbox__control::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cline x1='2' y1='8' x2='14' y2='8' fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='2'/%3E%3C/svg%3E");
}

.custom-checkbox__input:active ~ .custom-checkbox__control {
  -webkit-transform: scale(0.9);
          transform: scale(0.9);
}

.custom-checkbox__input:checked:active ~ .custom-checkbox__control,
.custom-checkbox__input:indeterminate:active ~ .custom-checkbox__control {
  -webkit-transform: scale(1);
          transform: scale(1);
}

.custom-checkbox__input:focus ~ .custom-checkbox__control::before {
  opacity: 0.2;
  -webkit-transform: translate(-50%, -50%) scale(1);
          transform: translate(-50%, -50%) scale(1);
}

/* --icon */
.custom-checkbox--icon {
  --custom-checkbox-size: 32px;
}
.custom-checkbox--icon .custom-checkbox__control::after {
  display: none;
}
.custom-checkbox--icon .icon {
  display: block;
  color: inherit;
  position: relative;
  z-index: 1;
}