<ul class="game-area">
  <ul class="target">
    <li><input type="checkbox" class="inner-check"></li>
    <li><input type="checkbox" class="middle-check"></li>
    <li><input type="checkbox" class="outer-check"></li>
  </ul>
</ul>

<h1 class="total-count">Total Points: &nbsp;</h1>
* {
  box-sizing: border-box;
}

h1 {
  font-size: 1.4em;
}

body {
  counter-reset: game;
  text-align: center;
  background: #e4e9d0;
  font-family: 'Open Sans', 'Helvetica', 'Arial', sans-serif;
  color: #333;
}

.game-area {
  display: flex;
  flex-flow: wrap;
  align-items: center;
  justify-content: space-between;
  margin: 5em auto;
  position: relative;
  padding-left: 0; //list reset
}

.total-count {
  font-size: 1.75em;
  position: absolute;
  top: 1em;
  width: 100%;
  left: 0;
  text-align: center;
  z-index: 300;
}

.total-count::after {
  content: counter(game);
}

%target-ring {
  position: absolute;
  cursor: crosshair;
  border-radius: 50%;
  display: block;
  left: 0;
  right: 0;
  text-align: center;
  margin: 0 auto;
  -webkit-appearance: none;
  appearance: none;
  z-index: 1;
  transition: .15s;

  &:focus {
    outline: none;
    appearance: none;
  }

  &:checked {
    filter: brightness(1);
    background: #3e95a4;

    &:after {
      content: '';
      padding: .5em;
      margin: 1em 0 0 1.5em;
      font-size: 2.5em;
    }
  }
}

.inner-check {
  @extend %target-ring;
  background: red;
  top: 50px;
  width: 50px;
  height: 50px;
  z-index: 3;

  &:checked {
    counter-increment: game 5;
  }

  &:checked::after {
    content: '+5';
  }
}

.middle-check {
  @extend %target-ring;
  background: white;
  width: 100px;
  height: 100px;
  z-index: 2;
  top: 25px;

  &:checked {
    counter-increment: game 3;
    background: #bffff5;
  }

  &:checked::after {
    content: '+3';
  }
}

.outer-check {
  @extend %target-ring;
  background: red;
  width: 150px;
  height: 150px;
  z-index: 1;

  &:checked {
    counter-increment: game 1;
  }

  &:checked::after {
    content: '+1';
  }
}

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