纯CSS3实现的井字棋游戏

<div class="tic-tac-toe">
  <input class="player-1 left first-column top first-row first-diagonal turn-1" id="block1-1-1" type="radio"/>
  <label class="turn-1" for="block1-1-1"></label>
  <input class="player-1 middle second-column top first-row turn-1" id="block1-1-2" type="radio"/>
  <label class="turn-1" for="block1-1-2"></label>
  <input class="player-1 right third-column top first-row second-diagonal turn-1" id="block1-1-3" type="radio"/>
  <label class="turn-1" for="block1-1-3"></label>
  <input class="player-1 left first-column center second-row turn-1" id="block1-2-1" type="radio"/>
  <label class="turn-1" for="block1-2-1"></label>
  <input class="player-1 middle second-column center second-row first-diagonal second-diagonal turn-1" id="block1-2-2" type="radio"/>
  <label class="turn-1" for="block1-2-2"></label>
  <input class="player-1 right third-column center second-row turn-1" id="block1-2-3" type="radio"/>
  <label class="turn-1" for="block1-2-3"></label>
  <input class="player-1 left first-column bottom third-row second-diagonal turn-1" id="block1-3-1" type="radio"/>
  <label class="turn-1" for="block1-3-1"></label>
  <input class="player-1 middle second-column bottom third-row turn-1" id="block1-3-2" type="radio"/>
  <label class="turn-1" for="block1-3-2"></label>
  <input class="player-1 right third-column bottom third-row first-diagonal turn-1" id="block1-3-3" type="radio"/>
  <label class="turn-1" for="block1-3-3"></label>
  <input class="player-2 left first-column top first-row first-diagonal turn-2" id="block2-1-1" type="radio"/>
  <label class="turn-2" for="block2-1-1"></label>
  <input class="player-2 middle second-column top first-row turn-2" id="block2-1-2" type="radio"/>
  <label class="turn-2" for="block2-1-2"></label>
  <input class="player-2 right third-column top first-row second-diagonal turn-2" id="block2-1-3" type="radio"/>
  <label class="turn-2" for="block2-1-3"></label>
  <input class="player-2 left first-column center second-row turn-2" id="block2-2-1" type="radio"/>
  <label class="turn-2" for="block2-2-1"></label>
  <input class="player-2 middle second-column center second-row first-diagonal second-diagonal turn-2" id="block2-2-2" type="radio"/>
  <label class="turn-2" for="block2-2-2"></label>
  <input class="player-2 right third-column center second-row turn-2" id="block2-2-3" type="radio"/>
  <label class="turn-2" for="block2-2-3"></label>
  <input class="player-2 left first-column bottom third-row second-diagonal turn-2" id="block2-3-1" type="radio"/>
  <label class="turn-2" for="block2-3-1"></label>
  <input class="player-2 middle second-column bottom third-row turn-2" id="block2-3-2" type="radio"/>
  <label class="turn-2" for="block2-3-2"></label>
  <input class="player-2 right third-column bottom third-row first-diagonal turn-2" id="block2-3-3" type="radio"/>
  <label class="turn-2" for="block2-3-3"></label>
  <input class="player-1 left first-column top first-row first-diagonal turn-3" id="block3-1-1" type="radio"/>
  <label class="turn-3" for="block3-1-1"></label>
  <input class="player-1 middle second-column top first-row turn-3" id="block3-1-2" type="radio"/>
  <label class="turn-3" for="block3-1-2"></label>
  <input class="player-1 right third-column top first-row second-diagonal turn-3" id="block3-1-3" type="radio"/>
  <label class="turn-3" for="block3-1-3"></label>
  <input class="player-1 left first-column center second-row turn-3" id="block3-2-1" type="radio"/>
  <label class="turn-3" for="block3-2-1"></label>
  <input class="player-1 middle second-column center second-row first-diagonal second-diagonal turn-3" id="block3-2-2" type="radio"/>
  <label class="turn-3" for="block3-2-2"></label>
  <input class="player-1 right third-column center second-row turn-3" id="block3-2-3" type="radio"/>
  <label class="turn-3" for="block3-2-3"></label>
  <input class="player-1 left first-column bottom third-row second-diagonal turn-3" id="block3-3-1" type="radio"/>
  <label class="turn-3" for="block3-3-1"></label>
  <input class="player-1 middle second-column bottom third-row turn-3" id="block3-3-2" type="radio"/>
  <label class="turn-3" for="block3-3-2"></label>
  <input class="player-1 right third-column bottom third-row first-diagonal turn-3" id="block3-3-3" type="radio"/>
  <label class="turn-3" for="block3-3-3"></label>
  <input class="player-2 left first-column top first-row first-diagonal turn-4" id="block4-1-1" type="radio"/>
  <label class="turn-4" for="block4-1-1"></label>
  <input class="player-2 middle second-column top first-row turn-4" id="block4-1-2" type="radio"/>
  <label class="turn-4" for="block4-1-2"></label>
  <input class="player-2 right third-column top first-row second-diagonal turn-4" id="block4-1-3" type="radio"/>
  <label class="turn-4" for="block4-1-3"></label>
  <input class="player-2 left first-column center second-row turn-4" id="block4-2-1" type="radio"/>
  <label class="turn-4" for="block4-2-1"></label>
  <input class="player-2 middle second-column center second-row first-diagonal second-diagonal turn-4" id="block4-2-2" type="radio"/>
  <label class="turn-4" for="block4-2-2"></label>
  <input class="player-2 right third-column center second-row turn-4" id="block4-2-3" type="radio"/>
  <label class="turn-4" for="block4-2-3"></label>
  <input class="player-2 left first-column bottom third-row second-diagonal turn-4" id="block4-3-1" type="radio"/>
  <label class="turn-4" for="block4-3-1"></label>
  <input class="player-2 middle second-column bottom third-row turn-4" id="block4-3-2" type="radio"/>
  <label class="turn-4" for="block4-3-2"></label>
  <input class="player-2 right third-column bottom third-row first-diagonal turn-4" id="block4-3-3" type="radio"/>
  <label class="turn-4" for="block4-3-3"></label>
  <input class="player-1 left first-column top first-row first-diagonal turn-5" id="block5-1-1" type="radio"/>
  <label class="turn-5" for="block5-1-1"></label>
  <input class="player-1 middle second-column top first-row turn-5" id="block5-1-2" type="radio"/>
  <label class="turn-5" for="block5-1-2"></label>
  <input class="player-1 right third-column top first-row second-diagonal turn-5" id="block5-1-3" type="radio"/>
  <label class="turn-5" for="block5-1-3"></label>
  <input class="player-1 left first-column center second-row turn-5" id="block5-2-1" type="radio"/>
  <label class="turn-5" for="block5-2-1"></label>
  <input class="player-1 middle second-column center second-row first-diagonal second-diagonal turn-5" id="block5-2-2" type="radio"/>
  <label class="turn-5" for="block5-2-2"></label>
  <input class="player-1 right third-column center second-row turn-5" id="block5-2-3" type="radio"/>
  <label class="turn-5" for="block5-2-3"></label>
  <input class="player-1 left first-column bottom third-row second-diagonal turn-5" id="block5-3-1" type="radio"/>
  <label class="turn-5" for="block5-3-1"></label>
  <input class="player-1 middle second-column bottom third-row turn-5" id="block5-3-2" type="radio"/>
  <label class="turn-5" for="block5-3-2"></label>
  <input class="player-1 right third-column bottom third-row first-diagonal turn-5" id="block5-3-3" type="radio"/>
  <label class="turn-5" for="block5-3-3"></label>
  <input class="player-2 left first-column top first-row first-diagonal turn-6" id="block6-1-1" type="radio"/>
  <label class="turn-6" for="block6-1-1"></label>
  <input class="player-2 middle second-column top first-row turn-6" id="block6-1-2" type="radio"/>
  <label class="turn-6" for="block6-1-2"></label>
  <input class="player-2 right third-column top first-row second-diagonal turn-6" id="block6-1-3" type="radio"/>
  <label class="turn-6" for="block6-1-3"></label>
  <input class="player-2 left first-column center second-row turn-6" id="block6-2-1" type="radio"/>
  <label class="turn-6" for="block6-2-1"></label>
  <input class="player-2 middle second-column center second-row first-diagonal second-diagonal turn-6" id="block6-2-2" type="radio"/>
  <label class="turn-6" for="block6-2-2"></label>
  <input class="player-2 right third-column center second-row turn-6" id="block6-2-3" type="radio"/>
  <label class="turn-6" for="block6-2-3"></label>
  <input class="player-2 left first-column bottom third-row second-diagonal turn-6" id="block6-3-1" type="radio"/>
  <label class="turn-6" for="block6-3-1"></label>
  <input class="player-2 middle second-column bottom third-row turn-6" id="block6-3-2" type="radio"/>
  <label class="turn-6" for="block6-3-2"></label>
  <input class="player-2 right third-column bottom third-row first-diagonal turn-6" id="block6-3-3" type="radio"/>
  <label class="turn-6" for="block6-3-3"></label>
  <input class="player-1 left first-column top first-row first-diagonal turn-7" id="block7-1-1" type="radio"/>
  <label class="turn-7" for="block7-1-1"></label>
  <input class="player-1 middle second-column top first-row turn-7" id="block7-1-2" type="radio"/>
  <label class="turn-7" for="block7-1-2"></label>
  <input class="player-1 right third-column top first-row second-diagonal turn-7" id="block7-1-3" type="radio"/>
  <label class="turn-7" for="block7-1-3"></label>
  <input class="player-1 left first-column center second-row turn-7" id="block7-2-1" type="radio"/>
  <label class="turn-7" for="block7-2-1"></label>
  <input class="player-1 middle second-column center second-row first-diagonal second-diagonal turn-7" id="block7-2-2" type="radio"/>
  <label class="turn-7" for="block7-2-2"></label>
  <input class="player-1 right third-column center second-row turn-7" id="block7-2-3" type="radio"/>
  <label class="turn-7" for="block7-2-3"></label>
  <input class="player-1 left first-column bottom third-row second-diagonal turn-7" id="block7-3-1" type="radio"/>
  <label class="turn-7" for="block7-3-1"></label>
  <input class="player-1 middle second-column bottom third-row turn-7" id="block7-3-2" type="radio"/>
  <label class="turn-7" for="block7-3-2"></label>
  <input class="player-1 right third-column bottom third-row first-diagonal turn-7" id="block7-3-3" type="radio"/>
  <label class="turn-7" for="block7-3-3"></label>
  <input class="player-2 left first-column top first-row first-diagonal turn-8" id="block8-1-1" type="radio"/>
  <label class="turn-8" for="block8-1-1"></label>
  <input class="player-2 middle second-column top first-row turn-8" id="block8-1-2" type="radio"/>
  <label class="turn-8" for="block8-1-2"></label>
  <input class="player-2 right third-column top first-row second-diagonal turn-8" id="block8-1-3" type="radio"/>
  <label class="turn-8" for="block8-1-3"></label>
  <input class="player-2 left first-column center second-row turn-8" id="block8-2-1" type="radio"/>
  <label class="turn-8" for="block8-2-1"></label>
  <input class="player-2 middle second-column center second-row first-diagonal second-diagonal turn-8" id="block8-2-2" type="radio"/>
  <label class="turn-8" for="block8-2-2"></label>
  <input class="player-2 right third-column center second-row turn-8" id="block8-2-3" type="radio"/>
  <label class="turn-8" for="block8-2-3"></label>
  <input class="player-2 left first-column bottom third-row second-diagonal turn-8" id="block8-3-1" type="radio"/>
  <label class="turn-8" for="block8-3-1"></label>
  <input class="player-2 middle second-column bottom third-row turn-8" id="block8-3-2" type="radio"/>
  <label class="turn-8" for="block8-3-2"></label>
  <input class="player-2 right third-column bottom third-row first-diagonal turn-8" id="block8-3-3" type="radio"/>
  <label class="turn-8" for="block8-3-3"></label>
  <input class="player-1 left first-column top first-row first-diagonal turn-9" id="block9-1-1" type="radio"/>
  <label class="turn-9" for="block9-1-1"></label>
  <input class="player-1 middle second-column top first-row turn-9" id="block9-1-2" type="radio"/>
  <label class="turn-9" for="block9-1-2"></label>
  <input class="player-1 right third-column top first-row second-diagonal turn-9" id="block9-1-3" type="radio"/>
  <label class="turn-9" for="block9-1-3"></label>
  <input class="player-1 left first-column center second-row turn-9" id="block9-2-1" type="radio"/>
  <label class="turn-9" for="block9-2-1"></label>
  <input class="player-1 middle second-column center second-row first-diagonal second-diagonal turn-9" id="block9-2-2" type="radio"/>
  <label class="turn-9" for="block9-2-2"></label>
  <input class="player-1 right third-column center second-row turn-9" id="block9-2-3" type="radio"/>
  <label class="turn-9" for="block9-2-3"></label>
  <input class="player-1 left first-column bottom third-row second-diagonal turn-9" id="block9-3-1" type="radio"/>
  <label class="turn-9" for="block9-3-1"></label>
  <input class="player-1 middle second-column bottom third-row turn-9" id="block9-3-2" type="radio"/>
  <label class="turn-9" for="block9-3-2"></label>
  <input class="player-1 right third-column bottom third-row first-diagonal turn-9" id="block9-3-3" type="radio"/>
  <label class="turn-9" for="block9-3-3"></label>
  <div class="end">
    <h3></h3><a href="">Restart</a>
  </div>
</div>
<h5>Note: use the Full Page view for the best experience.</h5>

@charset "UTF-8";
/* Variables
-------------------------------------------------------------- */
/* Body and Notice styling
-------------------------------------------------------------- */
body {
  color: #b6b5ca;
  font-family: 'Arial', sans-serif;
  margin: 0;
  text-align: center;
}

h5 {
  font-weight: 400;
  padding: 0 20px;
}

/* Tic-tac-toe game
-------------------------------------------------------------- */
.tic-tac-toe {
  font-family: 'Open Sans', sans-serif;
  height: 300px;
  overflow: hidden;
  margin: 50px auto 30px auto;
  position: relative;
  width: 300px;
}
@media (min-width: 450px) {
  .tic-tac-toe {
    height: 450px;
    width: 450px;
  }
}
.tic-tac-toe input[type="radio"] {
  display: none;
}
.tic-tac-toe input[type="radio"]:checked + label {
  cursor: default;
  z-index: 10 !important;
}
.tic-tac-toe input[type="radio"].player-1 + label:after {
  content: "";
}
.tic-tac-toe input[type="radio"].player-2 + label:after {
  content: "";
}
.tic-tac-toe input[type="radio"].player-1:checked + label:after, .tic-tac-toe input[type="radio"].player-2:checked + label:after {
  opacity: 1;
}
.tic-tac-toe input[type="radio"].player-1:checked + label {
  background-color: #dc685a;
}
.tic-tac-toe input[type="radio"].player-2:checked + label {
  background-color: #ecaf4f;
}
.tic-tac-toe input[type="radio"].turn-1 + label {
  z-index: 1;
}
.tic-tac-toe input[type="radio"].turn-2 + label {
  z-index: 2;
}
.tic-tac-toe input[type="radio"].turn-3 + label {
  z-index: 3;
}
.tic-tac-toe input[type="radio"].turn-4 + label {
  z-index: 4;
}
.tic-tac-toe input[type="radio"].turn-5 + label {
  z-index: 5;
}
.tic-tac-toe input[type="radio"].turn-6 + label {
  z-index: 6;
}
.tic-tac-toe input[type="radio"].turn-7 + label {
  z-index: 7;
}
.tic-tac-toe input[type="radio"].turn-8 + label {
  z-index: 8;
}
.tic-tac-toe input[type="radio"].turn-9 + label {
  z-index: 9;
}
.tic-tac-toe input[type="radio"].turn-1 + label {
  display: block;
}
.tic-tac-toe input[type="radio"].turn-1:checked ~ .turn-2 + label {
  display: block;
}
.tic-tac-toe input[type="radio"].turn-2:checked ~ .turn-3 + label {
  display: block;
}
.tic-tac-toe input[type="radio"].turn-3:checked ~ .turn-4 + label {
  display: block;
}
.tic-tac-toe input[type="radio"].turn-4:checked ~ .turn-5 + label {
  display: block;
}
.tic-tac-toe input[type="radio"].turn-5:checked ~ .turn-6 + label {
  display: block;
}
.tic-tac-toe input[type="radio"].turn-6:checked ~ .turn-7 + label {
  display: block;
}
.tic-tac-toe input[type="radio"].turn-7:checked ~ .turn-8 + label {
  display: block;
}
.tic-tac-toe input[type="radio"].turn-8:checked ~ .turn-9 + label {
  display: block;
}
.tic-tac-toe input[type="radio"].left + label {
  left: 0;
}
.tic-tac-toe input[type="radio"].top + label {
  top: 0;
}
.tic-tac-toe input[type="radio"].middle + label {
  left: 100px;
}
.tic-tac-toe input[type="radio"].right + label {
  left: 200px;
}
.tic-tac-toe input[type="radio"].center + label {
  top: 100px;
}
.tic-tac-toe input[type="radio"].bottom + label {
  top: 200px;
}
@media (min-width: 450px) {
  .tic-tac-toe input[type="radio"].middle + label {
    left: 150px;
  }
  .tic-tac-toe input[type="radio"].right + label {
    left: 300px;
  }
  .tic-tac-toe input[type="radio"].center + label {
    top: 150px;
  }
  .tic-tac-toe input[type="radio"].bottom + label {
    top: 300px;
  }
}
.tic-tac-toe input[type="radio"]:checked ~ input[type="radio"]:checked ~ input[type="radio"]:checked ~
input[type="radio"]:checked ~ input[type="radio"]:checked ~ input[type="radio"]:checked ~
input[type="radio"]:checked ~ input[type="radio"]:checked ~ input[type="radio"]:checked ~ .end {
  display: block;
}
.tic-tac-toe input[type="radio"]:checked ~ input[type="radio"]:checked ~ input[type="radio"]:checked ~
input[type="radio"]:checked ~ input[type="radio"]:checked ~ input[type="radio"]:checked ~
input[type="radio"]:checked ~ input[type="radio"]:checked ~ input[type="radio"]:checked ~ .end > h3:before {
  content: "It is a tie!";
}
.tic-tac-toe .player-1.first-column:checked ~ .player-1.first-column:checked ~ .player-1.first-column:checked ~ .end,
.tic-tac-toe .player-1.second-column:checked ~ .player-1.second-column:checked ~ .player-1.second-column:checked ~ .end,
.tic-tac-toe .player-1.third-column:checked ~ .player-1.third-column:checked ~ .player-1.third-column:checked ~ .end,
.tic-tac-toe .player-1.first-row:checked ~ .player-1.first-row:checked ~ .player-1.first-row:checked ~ .end,
.tic-tac-toe .player-1.second-row:checked ~ .player-1.second-row:checked ~ .player-1.second-row:checked ~ .end,
.tic-tac-toe .player-1.third-row:checked ~ .player-1.third-row:checked ~ .player-1.third-row:checked ~ .end,
.tic-tac-toe .player-1.first-diagonal:checked ~ .player-1.first-diagonal:checked ~ .player-1.first-diagonal:checked ~ .end,
.tic-tac-toe .player-1.second-diagonal:checked ~ .player-1.second-diagonal:checked ~ .player-1.second-diagonal:checked ~ .end {
  display: block;
}
.tic-tac-toe .player-1.first-column:checked ~ .player-1.first-column:checked ~ .player-1.first-column:checked ~ .end h3:before,
.tic-tac-toe .player-1.second-column:checked ~ .player-1.second-column:checked ~ .player-1.second-column:checked ~ .end h3:before,
.tic-tac-toe .player-1.third-column:checked ~ .player-1.third-column:checked ~ .player-1.third-column:checked ~ .end h3:before,
.tic-tac-toe .player-1.first-row:checked ~ .player-1.first-row:checked ~ .player-1.first-row:checked ~ .end h3:before,
.tic-tac-toe .player-1.second-row:checked ~ .player-1.second-row:checked ~ .player-1.second-row:checked ~ .end h3:before,
.tic-tac-toe .player-1.third-row:checked ~ .player-1.third-row:checked ~ .player-1.third-row:checked ~ .end h3:before,
.tic-tac-toe .player-1.first-diagonal:checked ~ .player-1.first-diagonal:checked ~ .player-1.first-diagonal:checked ~ .end h3:before,
.tic-tac-toe .player-1.second-diagonal:checked ~ .player-1.second-diagonal:checked ~ .player-1.second-diagonal:checked ~ .end h3:before {
  content: "Player 1 wins!" !important;
}
.tic-tac-toe .player-2.first-column:checked ~ .player-2.first-column:checked ~ .player-2.first-column:checked ~ .end,
.tic-tac-toe .player-2.second-column:checked ~ .player-2.second-column:checked ~ .player-2.second-column:checked ~ .end,
.tic-tac-toe .player-2.third-column:checked ~ .player-2.third-column:checked ~ .player-2.third-column:checked ~ .end,
.tic-tac-toe .player-2.first-row:checked ~ .player-2.first-row:checked ~ .player-2.first-row:checked ~ .end,
.tic-tac-toe .player-2.second-row:checked ~ .player-2.second-row:checked ~ .player-2.second-row:checked ~ .end,
.tic-tac-toe .player-2.third-row:checked ~ .player-2.third-row:checked ~ .player-2.third-row:checked ~ .end,
.tic-tac-toe .player-2.first-diagonal:checked ~ .player-2.first-diagonal:checked ~ .player-2.first-diagonal:checked ~ .end,
.tic-tac-toe .player-2.second-diagonal:checked ~ .player-2.second-diagonal:checked ~ .player-2.second-diagonal:checked ~ .end {
  display: block;
}
.tic-tac-toe .player-2.first-column:checked ~ .player-2.first-column:checked ~ .player-2.first-column:checked ~ .end h3:before,
.tic-tac-toe .player-2.second-column:checked ~ .player-2.second-column:checked ~ .player-2.second-column:checked ~ .end h3:before,
.tic-tac-toe .player-2.third-column:checked ~ .player-2.third-column:checked ~ .player-2.third-column:checked ~ .end h3:before,
.tic-tac-toe .player-2.first-row:checked ~ .player-2.first-row:checked ~ .player-2.first-row:checked ~ .end h3:before,
.tic-tac-toe .player-2.second-row:checked ~ .player-2.second-row:checked ~ .player-2.second-row:checked ~ .end h3:before,
.tic-tac-toe .player-2.third-row:checked ~ .player-2.third-row:checked ~ .player-2.third-row:checked ~ .end h3:before,
.tic-tac-toe .player-2.first-diagonal:checked ~ .player-2.first-diagonal:checked ~ .player-2.first-diagonal:checked ~ .end h3:before,
.tic-tac-toe .player-2.second-diagonal:checked ~ .player-2.second-diagonal:checked ~ .player-2.second-diagonal:checked ~ .end h3:before {
  content: "Player 2 wins!" !important;
}
.tic-tac-toe label {
  background-color: #78bec5;
  border-radius: 14px;
  cursor: pointer;
  color: #fff;
  display: none;
  height: 90px;
  margin: 5px;
  position: absolute;
  width: 90px;
  -moz-transition: background-color 0.3s;
  -o-transition: background-color 0.3s;
  -webkit-transition: background-color 0.3s;
  transition: background-color 0.3s;
}
@media (min-width: 450px) {
  .tic-tac-toe label {
    height: 140px;
    width: 140px;
  }
}
.tic-tac-toe label:hover {
  background-color: #3d4250;
}
.tic-tac-toe label:hover:after {
  opacity: .4;
}
.tic-tac-toe label:after {
  left: 0;
  font-family: "FontAwesome";
  font-size: 45px;
  margin-top: -22.5px;
  opacity: 0;
  position: absolute;
  text-align: center;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
  top: 50%;
  width: 100%;
}
@media (min-width: 450px) {
  .tic-tac-toe label:after {
    font-size: 70px;
    margin-top: -35px;
  }
}
.tic-tac-toe .end {
  background: rgba(255, 255, 255, 0.8);
  bottom: 5px;
  color: #3d4250;
  display: none;
  left: 5px;
  padding-top: 55px;
  position: absolute;
  right: 5px;
  top: 5px;
  text-align: center;
  z-index: 11;
}
@media (min-width: 450px) {
  .tic-tac-toe .end {
    padding-top: 110px;
  }
}
.tic-tac-toe .end h3 {
  font-size: 30px;
  font-weight: 300;
}
@media (min-width: 450px) {
  .tic-tac-toe .end h3 {
    font-size: 40px;
  }
}
.tic-tac-toe .end a {
  background-color: #3d4250;
  border-radius: 4px;
  color: #fff;
  padding: 14px 45px;
  text-decoration: none;
  -moz-transition: background-color 0.2s;
  -o-transition: background-color 0.2s;
  -webkit-transition: background-color 0.2s;
  transition: background-color 0.2s;
}
.tic-tac-toe .end a:hover {
  background-color: #262934;
  cursor: pointer;