* {
  margin: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
  user-select: none;
  color: white;
}
body {
  background: #3d0275;
}
.container {
  margin: 0 auto;
  max-width: 450px;
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 30px;

  .header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 300px;

    .header__player {
      background: #5e005e;
      width: 60px;
      height: 60px;
      display: flex;
      justify-content: center;
      align-items: center;
      font-size: 30px;
      font-weight: bold;
      cursor: pointer;
      border-radius: 10px;
      border: solid 4px #5e005e;
      opacity: 0.8;
      transition: 0.4s background;
    }
    .header__player:hover {
      border: solid 4px #743274;
    }
    .active {
      opacity: 1;
      border: solid 4px #743274;
    }
    #O_player {
      color: #1892ea;
    }
    #X_player {
      color: #ffd700;
    }
  }

  .main__score {
    height: 3rem;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;

    .score_o,
    .score_x {
      padding: 0 1rem;
      font-weight: 500;
      font-size: 1.5rem;
    }
  }

  .main__board {
    display: grid;
    grid-template-columns: repeat(3, 90px);
    grid-template-rows: repeat(3, 90px);
    gap: 12px;
    .cell {
      background: #17122a;
      border-radius: 10px;
      display: flex;
      justify-content: center;
      align-items: center;
      font-size: 42px;
      font-weight: bold;
      cursor: pointer;
      transform: 0.4s background;
    }
  }
  .restart {
    margin-top: 30px;
    background: #17122a;
    width: 300px;
    padding: 8px 0;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transform: 0.4s background;
    visibility: hidden;
  }
  .restart:hover {
    background: #5e005e;
  }
}
@media (hover: hover) {
  .cell:hover {
    background: #5e005e;
  }
}
@media (hover: none) {
  .cell:active {
    background: #5e005e;
  }
}