styles.css

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

button {
  padding: 16px 32px;
  border: none;
  color: white;
  background-color: #020024;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  opacity: 0.8;
}

.game-over-dialog {
  text-align: center;
  border: none;
  box-shadow: rgba(0, 0, 0, 0.4) 2px 2px 5px;
}
.game-over-message {
  padding: 16px 32px;
  font-size: 32px;
}

.game-body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background: radial-gradient(circle, #c75987 0%, #251b46 75%, #020024 100%);
}

.board {
  width: 500px;
  height: 500px;
  font-size: 100px;
  font-weight: bold;
  text-align: center;
  border-spacing: 8px;
}

.cell {
  border: 1px dashed rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  width: calc(100% / 3);
  height: calc(100% / 3);
  color: rgba(255, 255, 255, 0.8);
  text-shadow: rgba(0, 0, 0, 0.5) 2px 2px 3px;
  transition: background-color 0.3s;
}

.cell:hover {
  background-color: rgba(255, 255, 255, 0.1);
}
.cell:hover::after {
  content: var(--current-player, "X");
  opacity: 0.5;
}

.cell:empty {
  cursor: pointer;
}
.cell:not(:empty) {
  pointer-events: none;
}