css - Nested backface-visibility is not hidden -


i've got problem "nested" backface-visibility.

i have flipping div, content on both sides. that, use 2 div flipping, each 1 representing face of "two-faces" div (.face , .back).
rotation works well.

now, want hide container, , reveal when page loaded flip. can see, .face div visible.

how avoid .face visible before animation?

here's shorten working example made (chrome favor):

.flip {    position: relative;    backface-visibility: hidden;    transform: rotatex(180deg);    animation: init 1s ease 2s 1 normal forwards;  }  .flip div {    backface-visibility: hidden;    transition: 1s;    margin: 0;    padding: 20px;    border: 1px solid;    width: 200px;    text-align: center;  }  .back {    position: absolute;    top: 0;    left: 0;  }  .face,  .flip:hover .back {    transform: rotatex(0deg);  }  .flip:hover .face,  .back {    transform: rotatex(180deg);  }    @keyframes init {    { transform: rotatex(180deg); }      { transform: rotatex(0deg); }  }
<div class="flip">    <div class="face">face</div>    <div class="back">back</div>  </div>

if want work in nested way, need property 

  transform-style: preserve-3d;

in parent:

.flip {    position: relative;    backface-visibility: hidden;    transform: rotatex(180deg);    transform-style: preserve-3d;    animation: init 1s ease 2s 1 normal forwards;  }  .flip div {    backface-visibility: hidden;    transition: 1s;    margin: 0;    padding: 20px;    border: 1px solid;    width: 200px;    text-align: center;  }  .back {    position: absolute;    top: 0;    left: 0;  }  .face,  .flip:hover .back {    transform: rotatex(0deg);  }  .flip:hover .face,  .back {    transform: rotatex(180deg);  }    @keyframes init {    { transform: rotatex(180deg); }      { transform: rotatex(0deg); }  }
<div class="flip">    <div class="face">face</div>    <div class="back">back</div>  </div>


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