html {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  background-color: #F9FBFC;
  color:  #FF6652;
  font-family: 'Open Sans', sans-serif;
}
/* Black and white theme */
.bw-theme {
  background-color: black;
  color: white;
}

.bw-theme .square {
  border: 4px solid rgb(5, 107, 240);
}

.bw-theme .square:hover {
  background-color: #000000e2;
}

.bw-theme .square.X .outline:before, .bw-theme .square.X .outline:after {
  background: white;
}

.bw-theme .square.X .foreground:before, .bw-theme .square.X .foreground:after {
  background: white;
}

.bw-theme .square.O .outline:before {
  border: 14px solid rgb(240, 5, 5);
}

.bw-theme .square.O .foreground:after {
  border: 8px solid rgb(240, 5, 5);
}

*,
*:before,
*:after {
  box-sizing: inherit;
  -webkit-box-sizing: inherit;
  -moz-box-sizing: inherit;
}

body {
  display: grid;
  justify-content: center;
  align-items: center;
  min-height: 95vh;
  text-align: center;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, auto);
  margin: 30px auto 40px auto;
}

.square {
  width: 100px;
  height: 100px;
  border: 2px solid  #FF6652;
  transition: 0.2s ease-out;
  cursor: pointer;
  position: relative;
}

.square:hover {
  background-color:  #e5f4a3e2;
}


.gameOver .square:hover,
.square.X:hover,
.square.O:hover {
  background-color: inherit;
  cursor: default;
}



.square .outline {
  position: absolute;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100px;
  width: 100px;
}

.square .foreground {
  position: absolute;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100px;
  width: 100px;
}



.square.X .outline:before {
  content: "";
  background:  #002efc;
  width: 14px;
  height: 58px;
  position: absolute;
  transform: rotate(45deg);
  z-index: 2;
}

.square.X .outline:after {
  content: "";
  background:  #0054fcc3;
  width: 14px;
  height: 58px;
  position: absolute;
  transform: rotate(-45deg);
  z-index: 2;
}

.square.X .foreground:before {
  content: "";
  background:  #3f3476;
  width: 8px;
  height: 52px;
  position: absolute;
  transform: rotate(45deg);
  z-index: 3;
}

.square.X .foreground:after {
  content: "";
  background:  #3f3476;
  width: 8px;
  height: 52px;
  position: absolute;
  transform: rotate(-45deg);
  z-index: 3;
}

/* outline and foreground of a square with O */

.square.O .outline:before {
  content: "";
  background: transparent;
  width: 58px;
  height: 58px;
  position: absolute;
  border-radius: 50%;
  border: 14px solid #2b00fff6;
  z-index: 2;
}

.square.O .foreground:after {
  content: "";
  background: transparent;
  width: 52px;
  height: 52px;
  position: absolute;
  border-radius: 50%;
  border: 8px solid #2b00fff6;
  z-index: 3;
}

/* hide outer borders of the squares */

.square:nth-of-type(1),
.square:nth-of-type(2),
.square:nth-of-type(3) {
  border-top: none;
}

.square:nth-of-type(1),
.square:nth-of-type(4),
.square:nth-of-type(7) {
  border-left: none;
}

.square:nth-of-type(3),
.square:nth-of-type(6),
.square:nth-of-type(9) {
  border-right: none;
}

.square:nth-of-type(7),
.square:nth-of-type(8),
.square:nth-of-type(9) {
  border-bottom: none;
}

/* new game button */

button {
  background-color:  #0B033C;
  font-family: 'Open Sans', sans-serif;
  font-size: 14px;
  color: white;
  border: none;
  padding: 15px 30px;
  border-radius: 4px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.16), 0 2px 5px rgba(0, 0, 0, 0.26);
  transition: 0.2s ease-out;
  cursor: pointer;
}

/* change color and shadow of button when hovering */
button:hover {
  background-color: #05011C;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.16), 0 5px 6px rgba(0, 0, 0, 0.26);
}