tic-tac-toe.css

@import url(https://fonts.googleapis.com/css?family=Lato);

:root {
  --xRed: #ff4d4d;
  --oBlue: #4d4dff;
}

body {
  font-family: Lato;
  background-color: #567;
}

.topWrapper {
  margin: 50px auto 0;
  width: 300px;
  display: flex;
  justify-content: space-around;
}

.choiceBox {
  position: relative;
  border: 5px solid black;
  width: 150px;
  text-align: center;
  display: flex;
  justify-content: space-around;
  font-size: 3em;
  background-color: var(--xRed);
  transition: all 0.5s ease-out;
  -webkit-transition: all 0.5s ease-out;
  -moz-transition: all 0.5s ease-out;
  -o-transition: all 0.5s ease-out;
}

.blueBackground {
  background-color: var(--oBlue);
}

.xoSlider {
  position: absolute;
  width: 75px;
  height: 100%;
  background-color: #ccc;
  border: 5px solid #eee;
  box-sizing: border-box;
  right: 0;
  transition: all 0.3s;
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  -o-transition: all 0.3s;
}

.coverClicked {
  right: 75px;
}

.startGame {
  width: 30%;
  height: 67px;
  font-size: 2em;
  text-align: center;
  line-height: 55px;
  vertical-align: middle;
  background-color: #33cc33;
  border: 5px solid black;
  box-sizing: border-box;
  transition: all 0.05s ease-out;
  -webkit-transition: all 0.05s ease-out;
  -moz-transition: all 0.05s ease-out;
  -o-transition: all 0.05s ease-out;
}

.startGame:hover {
  background-color: #00ff00;
}

.startGame:active {
  background-color: #009900;
}

.inProgress {
  background-color: #f5d03d !important;
}

.gameBoard {
  margin: 20px auto;
  border: 4px solid black;
  width: 300px;
  height: 300px;
  background-color: #554f55;
}

.gameRow {
  margin: 0;
  padding: 0;
  width: 300px;
  height: 100px;
  display: flex;
}

.gameBox {
  border: 3px solid black;
  display: inline-block;
  box-sizing: border-box;
  width: 100px;
  height: 100%;
  margin: 0;
  padding: 0;
  font-size: 5em;
  text-align: center;
  transition: all 0.1s linear;
  -webkit-transition: all 0.1s linear;
  -moz-transition: all 0.1s linear;
  -o-transition: all 0.1s linear;
}

.X {
  background-color: var(--xRed);
}

.O {
  background-color: var(--oBlue);
}

.winColor {
  background-color: #33cc33 !important;
}