* {
  margin: 0;
  padding: 0;
  font-family: "Helvetica Neue";
}
body {
  background-color: #63D3C5;
}
header {
  overflow: hidden;
}
.gameContainer {
  position: relative;
  width: 500px;
  margin: 80px auto;
}
footer {
  margin: 40px 20px;
  color: #fff;
  text-align: center;
  font-size: 16px;
  font-family: Lora,'Times New Roman',serif;
  font-style: italic;
  font-weight: lighter;
}
.score {
  height: 100px;
}
.score h1 {
  float: left;
  font-size: 80px;
  font-weight: bold;
  color: #FBFCFC;
}
.score div {
  float: right;
  width: 100px;
  height: 60px;
  margin: 20px;
  padding-top: 5px;
  background-color: #D2F0A7;
  border-radius: 10px;
  color: #37C1C4;
  font-weight: bold;
  text-align: center;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
.score-num {
  font-size: 30px;
}
.newGame {
  cursor: pointer;
  float: right;
  width: 200px;
  height: 50px;
  line-height: 50px;
  font-size: 20px;
  font-weight: bold;
  background-color: #FEC13A;
  color: #fff;
  margin: 20px;
  text-align: center;
  border-radius: 6px;
  overflow: hidden;
}
.grid-container {
  position: relative;
  width: 500px;
  height: 500px;
  margin-top: 40px;
  padding: 10px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  overflow: hidden;
  background-color: #B6E5DF;
  border-radius: 10px;
}
.grid {
  position: absolute;
  z-index: 1;
}
.grid-cell-bg {
  float: left;
  background-color: #7ED6D0;
  margin: 10px;
}
.grid-cell-common {
  width: 100px;
  height: 100px;
  font-size: 60px;
  line-height: 100px;
  text-align: center;
  color: #fff;
  font-weight: 500;
  border-radius: 5px;
}
.grid-above {
  position: absolute;
  z-index: 2;
}
.mes {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  position: absolute;
  width: 500px;
  height: 500px;
  top: 230px;
  left: 0;
  background: rgba(0, 9, 19, 0.6);
  border-radius: 10px;
  z-index: 10;
}
.mes h1 {
  font-size: 55px;
  color: #fff;
  margin-bottom: 10%;
}
.mes button {
  cursor: pointer;
  width: 40%;
  height: 8%;
  border: none;
  border-radius: 10px;
  background-color: #FEC942;
  font-size: 25px;
  color: #011832;
  font-weight: bold;
}

@media screen and (max-width: 520px) {
  .gameContainer {
    width: 280px;
    margin: 30px auto;
  }
  .score {
    height: 80px;
  }
  .score h1 {
    font-size: 50px;
    margin-top: 5px;
  }
  .score div {
    width: 100px;
    height: 60px;
    margin: 0;
  }
  .score-num {
    font-size: 23px;
  }
  .newGame {
    width: 280px;
    margin: 0;
  }
  .grid-container {
    width: 280px;
    height: 280px;
    margin-top: 20px;
    padding: 5px;
  }
  .grid-cell-bg {
    margin: 5px;
  }
  .grid-cell-common {
    width: 57.5px;
    height: 57.5px;
    line-height: 57.5px;
  }
  .mes {
    width: 280px;
    height: 280px;
    top: 150px;
  }
  .mes h1 {
    font-size: 30px;
  }
  .mes button {
    width: 40%;
    height: 10%;
    font-size: 16px;
  }
}