@use '../base' as *;

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

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;
  color: alpha(var(--color-contrast-low), 0.65); /* unchecked color */

  &::before, &::after {
    content: '';
    position: absolute;
  }

  &::before { /* focus circle */
    width: 160%;
    height: 160%;
    background-color: currentColor;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    border-radius: 50%;
    will-change: transform;
  }

  &::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,
.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 */

  &::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 {
  transform: scale(0.9);
}

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

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

/* --icon */
.custom-checkbox--icon {
  --custom-checkbox-size: 32px;

  .custom-checkbox__control::after {
    display: none;
  }

  .icon {
    display: block;
    color: inherit;
    position: relative;
    z-index: 1;
  }
}