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HTML

              
                <div class="blocks">
  <input id="left-top" type="checkbox" name="left-top"/>
  <label for="left-top" class="trigger left top"></label>
  <div class="block left top">
    <h1>Left top block heading</h1>
    <div class="content"> 
      <h2>Left top block inner text heading</h2>
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH </p> 
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH</p>
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH</p>  
    </div> 
  </div> 
  <input id="right-top" type="checkbox" name="right-top"/>
  <label for="right-top" class="trigger right top"></label>
  <div class="block right top">
    <h1>Right top block heading</h1>
    <div class="content"> 
      <h2>Right top block inner text heading</h2>
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH </p>
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH</p>
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH</p>
    </div>
  </div>
  <input id="left-bot" type="checkbox" name="left-bot"/>
  <label for="left-bot" class="trigger left bot"></label>
  <div class="block left bot">
    <h1>Left bottom block heading</h1>
    <div class="content">
      <h2>Left bottom inner text heading</h2>
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH </p>
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH</p>
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH</p>
    </div>
  </div>
  <input id="right-bot" type="checkbox" name="right-bot"/>
  <label for="right-bot" class="trigger right bot"></label>
  <div class="block right bot">
    <h1>Right bottom block heading</h1>
    <div class="content">
      <h2>Right bottom inner text heading</h2>
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH </p>
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH</p>
      <p>LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH LOREM IPSUM AND YOU KNOW THE REST BLAH BLAH BLAH</p>
    </div>
  </div>
</div>
              
            
!

CSS

              
                @import "compass/css3";

*, *:before, *:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
a {
  color: inherit;
  text-decoration: none;
}
html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}
input[type=checkbox] {
  position: absolute;
  left: -9999px;
  top: -9999px;
}

/* SASS BASE CLASSES */
.absPos {
  position: absolute; 
  width: 50%;
  height: 50%;
  
  &.top {
    top: 0;
  }
  &.right {
    left: 50%;
  }
  &.bot {
    top: 50%;
  }
  &.left {
    left: 0;
  }
}
.labelClose {
  left: auto;
  bottom: auto;
  right: 0;
  top: 0;
  width: 30px;
  height: 30px;
  z-index: 101;
  animation: hideAndShow 1s;
  
  &:before {
    content: "+";
    display: block;
    position: absolute;
    top: 5px;
    right: 43px;
    font-size: 50px;
    line-height: 30px;
    font-weight: bold;
    color: #fff;
    transform: rotate(45deg);
    transition: 0.5s;
  }
  
  &:hover:before {
    transform: rotate(225deg);
    color: red;
  }
}
.activeBlock {
  transform: translateZ(0) scale(2.005);
  z-index: 100;
  overflow-x: hidden;
  overflow-y: auto;

  h1 {
    opacity: 0;
    z-index: 5;
  }
  .content {
    opacity: 1;
    z-index: 150;
  }
}
/* END OF SASS BASE CLASSES */

.blocks {
  width: 100%;
  height: 100%;
  position: relative;
  text-align: center;
  
  .trigger {
    @extend .absPos;
    z-index: 30;
    //transition: 0.5s;
    cursor: pointer;
    
    &:hover + .block h1 {
      color: #fff;
    }
  }
  .block {
    @extend .absPos;
    font-size: 14px;
    transition: 0.5s;
    will-change: transform;
    //transform-style: preserve-3d;
    z-index: 5;
    background-size: cover;
    
    &.left.top {
      //background: #f5bfb8;
      transform-origin: 0% 0%;
      background-image: url('https://2.bp.blogspot.com/_F91XpngCLn8/S-cdscZPSZI/AAAAAAAAADE/5vL-lYz1Wws/s1600/watchmen_by_imladriselleth.jpg');
    }
    &.right.top {
      //background: #c8f4f2;
      transform-origin: 100% 0%;
      background-image: url('http://images5.alphacoders.com/401/401566.jpg');
    }
    &.left.bot {
      //background: #c8f4c8;
      transform-origin: 0% 100%;
      background-image: url('http://images6.alphacoders.com/332/332890.jpg');
    }
    &.right.bot {
      //background: #eef4c8;
      transform-origin: 100% 100%;
      background-image: url('https://i.imgur.com/fXp6r5l.jpg');
    }
    
    h1 {
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translateX(-50%) translateY(-50%);
      text-transform: uppercase;
      color: #aaa;
      transition: 0.5s;
      will-change: opacity;
    }
    
    .content {
      opacity: 0;
      z-index: 1;
      padding: 2em;
      text-align: left;
      transition: 0.5s;
      color: #fff;
      background-color: rgba(0, 0, 0, 0.6);
      will-change: opacity;
      //transition-delay: 0.5s;
      
      h2 {
        font-size: 2.5em;
        margin-bottom: 1em;
      }
      p {
        font-size: 1em;
        margin: 0.5em 0;
      }
    }
  }
  
  #left-top:checked ~ .block.left.top {
    @extend .activeBlock;
  }
  #left-top:checked ~ .trigger.left.top {
    @extend .labelClose;
  }
  #right-top:checked ~ .block.right.top {
    @extend .activeBlock;
  }
  #right-top:checked ~ .trigger.right.top {
    @extend .labelClose;
  }
  #left-bot:checked ~ .block.left.bot {
    @extend .activeBlock;
  }
  #left-bot:checked ~ .trigger.left.bot {
    @extend .labelClose;
  }
  #right-bot:checked ~ .block.right.bot {
    @extend .activeBlock;
  }
  #right-bot:checked ~ .trigger.right.bot {
    @extend .labelClose;
  }
}
/* fix for position absolute label movement outside block */
@keyframes hideAndShow {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 0;
    transform: scale(0.5);
  }
  90% {
    transform: scale(1.2);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}
              
            
!

JS

              
                
              
            
!
999px

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