/* global styles */
*,
*::after,
*::before {
  box-sizing: border-box;
}

/* variables */
:root {
  --cell-size: 100px;
  --fill-size: calc(var(--cell-size) * 0.8);
  --primary-color: #000;
  --secondary-color: #f4f4f4;
  --text-primary-color: #000;
  --text-secondary-color: #f4f4f4;
  --x-color: red;
  --o-color: blue;
  --hover-color: color-mix(
    in srgb,
    var(--primary-color) 10%,
    var(--secondary-color)
  );
}

/* body style */
body {
  font-family: "Roboto", sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--secondary-color);
}

/* container style */
.container {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column-reverse;
  justify-content: space-between;
  align-items: center;
}

/* board style */
.board {
  margin-bottom: 90px;
  display: grid;
  justify-content: center;
  align-content: center;
  justify-items: center;
  align-items: center;
  width: 100vw;
  height: 60vh;
  grid-template-columns: repeat(3, auto);
}

/* cell style */
.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  border: 10px solid var(--primary-color);
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  cursor: pointer;
}

/* filled cell hover not allowed */
.cell.x:hover,
.cell.o:hover {
  cursor: not-allowed;
}

/* cell border elimination */

.cell:nth-child(9) {
  border-right: none;
  border-bottom: none;
}

.cell:nth-child(8) {
  border-bottom: none;
}

.cell:nth-child(7) {
  border-left: none;
  border-bottom: none;
}

.cell:nth-child(6) {
  border-right: none;
}

.cell:nth-child(4) {
  border-left: none;
}

.cell:nth-child(3) {
  border-right: none;
  border-top: none;
}

.cell:nth-child(2) {
  border-top: none;
}

.cell:nth-child(1) {
  border-left: none;
  border-top: none;
}

/* filled styles */

/* x fill */
.cell.x::before,
.cell.x::after,
.board.x .cell:not(.x):not(.o):hover::before,
.board.x .cell:not(.x):not(.o):hover::after {
  content: "";
  position: absolute;
  width: calc(var(--fill-size) * 0.15);
  height: var(--fill-size);
  background-color: var(--primary-color);
}

.board.x .cell:not(.x):not(.o):hover::before,
.board.x .cell:not(.x):not(.o):hover::after {
  background-color: var(--hover-color);
}

.cell.x::before,
.board.x .cell:not(.x):not(.o):hover::before {
  transform: rotate(45deg);
}

.cell.x::after,
.board.x .cell:not(.x):not(.o):hover::after {
  transform: rotate(-45deg);
}

/* o fill*/

.cell.o::before,
.cell.o::after,
.board.o .cell:not(.x):not(.o):hover::before,
.board.o .cell:not(.x):not(.o):hover::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.cell.o::before,
.board.o .cell:not(.x):not(.o):hover::before {
  width: var(--fill-size);
  height: var(--fill-size);
  background-color: var(--primary-color);
}

.cell.o::after,
.board.o .cell:not(.x):not(.o):hover::after {
  width: calc(var(--fill-size) * 0.7);
  height: calc(var(--fill-size) * 0.7);
  background-color: var(--secondary-color);
}

.board.o .cell:not(.x):not(.o):hover::before {
  background-color: var(--hover-color);
}

.board.o .cell:not(.x):not(.o):hover::after {
  background-color: var(--secondary-color);
}

.cell.x.win::before,
.cell.x.win::after {
  background-color: var(--x-color);
}

.cell.o.win::before {
  background-color: var(--o-color);
}

/* status style */
#status {
  display: none;
  position: absolute;
  width: 100%;
  height: 100px;
  margin-top: 2%;
  font-size: 4rem;
  font-weight: bold;
  padding: 20px;
}

#status.x {
  display: inline;
  text-align: left;
  background-color: var(--x-color);
  color: var(--text-primary-color);
}

#status.o {
  display: inline;
  text-align: right;
  background-color: var(--o-color);
  color: var(--text-secondary-color);
}

#status.win {
  display: inline;
  text-align: center;
}

#status.tie {
  display: inline;
  text-align: center;
  background-color: var(--primary-color);
  color: var(--text-secondary-color);
}

/* game title style */
#GameTitle {
  color: var(--text-primary-color);
  font-size: 4rem;
  font-weight: bold;
  margin-top: 2%;
  margin-bottom: 2%;
}

/* restart button style */

#GameTitle.restart {
  font-size: 2rem;
  border: 5px solid var(--primary-color);
  padding: 10px;
  margin-top: 3%;
}

#GameTitle.restart:hover {
  cursor: pointer;
  background-color: var(--primary-color);
  color: var(--text-secondary-color);
}