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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <div class='support-grid'></div>
<section class='grid-1'>
  <div class='title'>
    <img src='https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/merry-xmas.svg'>
  </div>
  <div class='day-1'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>1</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-2'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>2</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-3'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>3</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-4'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>4</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-5'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>5</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-6'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>6</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-7'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>7</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-8'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>8</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-9'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>9</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-10'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>10</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-11'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>11</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-12'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>12</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-13'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>13</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-14'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>14</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-15'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>15</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-16'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>16</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-17'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>17</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-18'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>18</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-19'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>19</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-20'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>20</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-21'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>21</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-22'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>22</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-23'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>23</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
  <div class='day-24'>
    <label>
      <input type='checkbox'>
        <div class='door'>
          <div class='front'>24</div>
          <div class='back'></div>
        </div>
      </input>
    </label>
  </div>
</section>
<footer><a href='http://webdesign.tutsplus.com/tutorials/how-to-build-a-festive-advent-calendar-with-css-grid--cms-30070'>
    Envato Tuts+ 2017 ☃️
  </a>
</footer>
            
          
!

CSS

            
              body {
  background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/snow-bg.svg) no-repeat top center #82d8cb;
  background-size: cover;
}

/* title graphic */
.title {  
  display: flex;
  align-items: center;
  justify-content: center; 
}

.title img {
  width: 90%;
  height: auto;
}

/* mobile first grid layout */
.grid-1 {
  display: grid;
  width: 96%;
  max-width: 900px;
  margin: 2% auto;
  
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto;
  grid-gap: 25px;
  
  grid-template-areas:    "t        t       t"
                          "d23      d20     d12"
                          "d2       d14     d4"
                          "d5       d22     d16"
                          "d1       d7      d9"
                          "d10      d11     d18"
                          "d13      d3      d15"
                          "d6       d17     d8"
                          "d19      d24     d21";
}

/* media query */
@media only screen and (min-width: 500px) {
  
  .grid-1 {
    grid-template-columns: repeat(6, 1fr);
    grid-template-areas: "t     t     t     d2      d7      d8"
                         "t     t     t     d4      d11     d12"
                         "t     t     t     d19     d9      d13"
                         "d6    d1    d24   d24     d21     d20"
                         "d17   d18   d24   d24     d5      d22"
                         "d3    d23   d16   d14     d10     d15";
  }
  
}


/* individual items */
  .title {
    grid-area: t;
  }
  .day-1 {
  grid-area: d1;
  }
  .day-1 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/child.svg);
  }
  .day-2 {
    grid-area: d2;
  }
  .day-2 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/donut.svg);
  }
  .day-3 {
    grid-area: d3;
  }
  .day-3 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/santa.svg);
  }
  .day-4 {
    grid-area: d4;
  }
  .day-4 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/child-3.svg);
  }
  .day-5 {
    grid-area: d5;
  }
  .day-5 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/book.svg);
  }
  .day-6 {
    grid-area: d6;
  }
  .day-6 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/snowflake.svg);
  }
  .day-7 {
    grid-area: d7;
  }
  .day-7 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/gift.svg);
  }
  .day-8 {
    grid-area: d8;
  }
  .day-8 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/stocking.svg);
  }
  .day-9 {
    grid-area: d9;
  }
  .day-9 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/gift.svg);
  }
  .day-10 {
    grid-area: d10;
  }
  .day-10 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/bird.svg);
  }
  .day-11 {
    grid-area: d11;
  }
  .day-11 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/snowman.svg);
  }
  .day-12 {
    grid-area: d12;
  }
  .day-12 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/child-2.svg);
  }
  .day-13 {
    grid-area: d13;
  }
  .day-13 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/holly.svg);
  }
  .day-14 {
    grid-area: d14;
  }
  .day-14 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/horse.svg);
  }
  .day-15 {
    grid-area: d15;
  }
  .day-15 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/book.svg);
  }
  .day-16 {
    grid-area: d16;
  }
  .day-16 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/bird.svg);
  }
  .day-17 {
    grid-area: d17;
  }
  .day-17 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/stocking.svg);
  }
  .day-18 {
    grid-area: d18;
  }
  .day-18 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/donut.svg);
  }
  .day-19 {
    grid-area: d19;
  }
  .day-19 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/child.svg);
  }
  .day-20 {
    grid-area: d20;
  }
  .day-20 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/holly.svg);
  }
  .day-21 {
    grid-area: d21;
  }
  .day-21 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/snowflake-2.svg);
  }
  .day-22 {
    grid-area: d22;
  }
  .day-22 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/santa.svg);
  }
  .day-23 {
    grid-area: d23;
  }
  .day-23 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/child-2.svg);
  }
  .day-24 {
    grid-area: d24;
  }
  .day-24 .back {
    background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/210284/tree.svg);
  }


/* door styles */

.grid-1 input {
  display: none;
}

label {
  perspective: 1000px;
  transform-style: preserve-3d;
  cursor: pointer;

  display: flex;
  min-height: 100%;
  width: 100%;
  height: 120px;
}

.door {
  width: 100%;
  transform-style: preserve-3d;
  transition: all 300ms;
  border: 2px dashed transparent;
  border-radius: 10px;
}

  .door div {
    position: absolute;
    height: 100%;
    width: 100%;
    backface-visibility: hidden;
    
    border-radius: 6px;

    display: flex;
    align-items: center;
    justify-content: center;
    
    /* typography */
    font-family: 'Kalam', cursive;
    color: #385052;
    font-size: 2em;
    font-weight: bold;
    text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.2);
  }

  .door .back {
      background-size: contain;
      background-position: center center;
      background-repeat: no-repeat;
      background-color: #2e313d;
      transform: rotateY(180deg);
  }

  label:hover .door {
    border-color: #385052;
  }

  :checked + .door {
    transform: rotateY(180deg);
  }


/* footer styles */
footer {
  text-align: center;
  padding: 2em 0;
}  
  footer a {
      color: #2e313d;
  } 
    footer a:hover {
          text-decoration: none;
    }

            
          
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JS

            
              
            
          
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999px

Console