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

.checkbox-field {
  margin: 1.25rem 0;
  display: block;
  text-align: left;
  padding: 0 1.125rem;
  /* font-weight: 500; */
  position: relative;
  cursor: pointer;

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

.checkbox-field-round {
  .checkbox-caption {
    min-width: 1.5rem;
    min-height: 1.5rem;

    &:before {
      color: #fff;
      font-size: 16px;
      line-height: 24px;
      margin-left: 4px;
      transition: opacity .2s ease-in-out;
      opacity: 0;
      position: absolute;
      font-weight: bold;
      z-index: 1;
    }

    &:after {
      content: '';
      position: absolute;
      border-radius: 50%;
      height: 1.5rem;
      width: 1.5rem;
      box-shadow: 0px 0px 3px 0px rgba(0, 0, 0, .4);
      border: 2px solid #fff;
      //left: 0;
      background-color: transparent;
      transition: background-color .2s ease-in-out;
    }
  }

  [type="checkbox"]:checked + .checkbox-caption {
    &:before {
      opacity: 1;
    }

    &:after {
      background-color: $button-primary-background;
    }
  }
}

.radio-field {
	position: relative;
	text-align: left;
	margin: 1.25rem 0;
	line-height: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  
  &.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%);
    }

    &::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"] {
  & + span {
    position: relative;
    padding-left: 3.5rem;
    cursor: pointer;
    display: inline-block;
    height: 25px;
    line-height: 25px;
    user-select: none;
    transition: .2s opacity;

    &:before, &:after {
      content: '';
      left: 0;
      position: absolute;
      transition: border .25s, background-color .25s, width .20s .1s, height .20s .1s, top .20s .1s, left .20s .1s;
    }
    
    &:before {
      border-radius: 2px;
      z-index: 1;
    }
    
    &:after {
      height: 18px;
      width: 18px;
      z-index: 0;
      border: 2px solid $button-primary-background;
      border-radius: 3px;
      top: 50%;
      transform: translateY(-50%);
    }
  }
  
  &:not(:checked) + span:before {
    width: 0;
    height: 0;
    border: 2px solid transparent;
    left: 6px;
    top: 10px;
    transform: rotateZ(45deg);
    transform-origin: 100% 100%;
  }
  
  &:checked + span:before {
    top: 4px;
    left: -1px;
    width: 8px;
    height: 14px;
    border-top: 2px solid transparent;
    border-left: 2px solid transparent;
    border-right: 2px solid #fff;
    border-bottom: 2px solid #fff;
    transform: rotateZ(45deg);
    transform-origin: 100% 100%;
  }
  
  &:not(:checked) + span:after {
    background-color: transparent;
    border-color: #8d969c;
  }
  
  &:checked + span:after {
    background-color: $button-primary-background;
  }

  &:disabled + span {
    cursor: default;
    opacity: .25;
  }
}