tweb-i2p/src/scss/partials/_checkbox.scss

.checkbox-field {
  --size: 18px;
  margin: 1.5rem 1.1875rem;
  display: block;
  text-align: left;
  position: relative;
  cursor: pointer;
  min-width: var(--size);
  min-height: var(--size);

  @include respond-to(handhelds) {
    margin-bottom: 27px;
  }

  .checkbox-box {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: var(--size);
    height: var(--size);
    border-radius: 3px;
    overflow: hidden;

    html.is-safari & {
      -webkit-mask-image: -webkit-radial-gradient(circle, white 100%, black 100%); // fix safari overflow
    }

    &-check, &-background, &-border {
      position: absolute;
      top: 0;
      left: 0;
    }

    &-border {
      right: 0;
      bottom: 0;
      border-radius: inherit;
      border: 2px solid #8d969c;
      //border-color: #000;
    }

    &-background {
      top: -15%;
      right: -15%;
      bottom: -15%;
      left: -15%;
      background-color: $button-primary-background;
      transform: scale(1);
      transition: transform .2s 0s ease-in-out;
      border-radius: 50%;
    }

    &-check {
      --offset: 1px;
      width: calc(var(--size) - var(--offset));
      height: calc(var(--size) - var(--offset));
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
  
      use {
        stroke: #fff;
        stroke-width: 2.75;
        stroke-linecap: round;
        stroke-dasharray: 24.19, 24.19;
        stroke-dashoffset: 0;
        transition: stroke-dasharray .1s .15s ease-in-out, visibility 0s .15s;
      }
    }
  }

  .checkbox-caption {
    position: relative;
    padding-left: 3.3125rem;
    cursor: pointer;
    display: inline-block;
    height: 24px;
    line-height: 26px;
    user-select: none;
    transition: .2s opacity;

    body.animation-level-0 & {
      transition: none;
    }
  }
}

.checkbox-field-round {
  --size: 1.5rem;

  .checkbox-box {
    border-radius: 50%;

    &-border {
      border: 2px solid #fff;
      z-index: 1;
    }

    &-check {
      --offset: 10px;
    }
  }
}

.radio-field {
	position: relative;
	text-align: left;
	margin: 1.25rem 0;
	line-height: 1.5rem;
  cursor: pointer;
  
  &.hidden-widget {
    cursor: default;

    .radio-field-main {
      &::before, &::after {
        visibility: hidden;
      }
    }
  }

  > input {
    &:checked {
      & ~ .radio-field-main {
        &::before {
          border-color: $button-primary-background;
        }
    
        &::after {
          opacity: 1;
        }
      }
    }
  }

  // ! can't use &-main here, check popup create poll
  .radio-field-main {
    padding-left: 3.5rem;
    position: relative;

    &::before, &::after {
      content: '';
      display: block;
      position: absolute;
      left: 0;
      top: 50%;
      width: 1.25rem;
      height: 1.25rem;
      transform: translateY(-50%);

      body.animation-level-0 & {
        transition: none;
      }
    }

    &::before {
      border: 2px solid #8d969c;
      border-radius: 50%;
      background-color: white;
      opacity: 1;
      transition: border-color .1s ease, opacity .1s ease;
    }

    &::after {
      left: .3125rem;
      width: .625rem;
      height: .625rem;
      border-radius: 50%;
      background: $button-primary-background;
      opacity: 0;
      transition: opacity .1s ease;
    }

    /* &-subtitle {
      color: #707579 !important;
      font-size: 14px !important;
    } */
  }

  /* &-with-subtitle {
    .radio-field-main {
      margin-bottom: 1.5rem;

      &-subtitle {
        margin-bottom: -1.5rem;
      }
    }
  } */
}

[type="checkbox"], [type="radio"] {
  box-sizing: border-box;
  padding: 0;
  opacity: 0;
  z-index: var(--z-below);
  position: absolute;
}

.checkbox-field [type="checkbox"] {
  &:not(:checked) + .checkbox-box {
    .checkbox-box-check {
      use {
        stroke-dasharray: 0, 24.19;
        visibility: hidden;
        transition: stroke-dasharray .1s ease-in-out, visibility 0s .1s;
      }
    }

    .checkbox-box-background {
      transition: transform .2s .05s ease-in-out;
      transform: scale(0);
    }
  }
  
  &:checked + .checkbox-box {
    
  }

  &:disabled + .checkbox-box, &:disabled ~ .checkbox-caption {
    cursor: default;
    opacity: .25;
  }
}