<header>
  <h1>Custom Radio buttons</h1> 
</header>

<form class="cb">
  
  <div class="cb__item">
    <input id="option_1" class="cb__input" type="radio" name="cb">
    <label for="option_1" class="cb__label">Option</label>
  </div>
      
  <div class="cb__item">
    <input id="option_2" class="cb__input" type="radio" name="cb">
    <label for="option_2" class="cb__label">Option</label>
  </div>
    
  <div class="cb__item">
    <input id="option_3" class="cb__input" type="radio" name="cb">
    <label for="option_3" class="cb__label">Option</label>
  </div> 
  
</form>
  

@import "bourbon";

@import url(https://fonts.googleapis.com/css?family=Noto+Sans:400,700|Lobster);

$background: #FFEBAF;
$primary: #FF608B;
$secondary: #B73E47;
//$tertiary: #B73E47;
$white: #fff;

$break1: 55em;
$break2: 75em;
$break3: 90em;

@mixin break($val) {
  @media (min-width: $val)  {
    @content;
  }
}

* {
  box-sizing: border-box;
}

body {
  background: $background;
  padding: 3em;
}

header {
  text-align: center;
  padding-bottom: 3em;
}

h1 {
  font-family: 'Lobster', cursive;
  font-size: 3.75em;
  color: $secondary;
  text-shadow: 0 2px lighten($secondary, 30%), 0 3px lighten($secondary, 30%), 0 4px lighten($secondary, 45%);
  margin: 0;
}

@keyframes check {

  0% {
    transform: scale(1);
  }

  45% {
    transform: scale(1.02);
  }

  75% {
    transform: scale(1);
  }

} // End animation

.cb {

  $source: 'cb';

  width: 406px;
  margin: 0 auto;

  @include clearfix;

  &__item {

    float: left;
    margin-right: 2em;

    &:last-child {
      margin-right: 0;
    }

  } // End item

  &__input {

    display: none;

    + label {

      &:before {  
        content:"☐";
        font-size: 8rem;
        position: absolute;
        top: -5rem;
        color: $secondary;
        line-height: 0;

        transition: all .7s ease;
      }

    }

    &:checked {

      + label {

        background: $primary;
        color: $white;
        box-shadow: 2px 2px 0 1px darken($primary, 10%);

        &:before {
          content: "☑";
          color: $primary;
          animation: check .6s 1;
        }

        &:after {
          border-bottom-color: $primary;
        }

      } // End label

    } // End checked

  } // End input

  &__label {

    position: relative; 
    display: block;
 background:url("https://raw.githubusercontent.com/thoughtbot/refills/master/source/images/textures/inverted/lghtmesh.png") #B73E47 scroll;
    
    border-radius: .25em;
    padding: 1em 2.25em;
    margin-top: 10em;
    font-size: .8em;
    color: $white;
    text-transform: uppercase;
    text-align: center;
    cursor: pointer;
    box-shadow: 2px 2px 0 1px darken($secondary, 15%);
    text-shadow: 0 1px rgba(255,255,255,.1);
    letter-spacing: 1px;

    &:before {
      content: "";
      position: absolute;
      top: -10em;
      left: 0;
      width: 100%;
      height: 8em;
    }

    &:after {
      content: "";
      position: absolute;
      top: -10px;
      left: 0;
      right: 0;
      margin: 0 auto;
      width: 0; 
      height: 0; 
      border-left: 10px solid transparent;
      border-right: 10px solid transparent;
      border-bottom: 10px solid $secondary;
    }

  }

}