header {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

header a {
  position: absolute;
  left: 0;
}

body {
  font-family: Arial, sans-serif;
  text-align: center;
}

#super-game {
  display: grid;
  grid-template-columns: repeat(3, 200px);
  grid-template-rows: repeat(3, 200px);
  gap: 5px;
  margin: 20px auto;
  width: 620px;
}

.big-cell {
  background-color: #444;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 2px;
  position: relative;
}

.small-cell {
  background-color: #eee;
  font-size: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #333;
}

.big-cell.won::after {
  content: attr(data-winner);
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.8);
  font-size: 100px;
  color: red;
  display: flex;
  align-items: center;
  justify-content: center;
}

#status {
  margin-top: 20px;
  font-size: 24px;
}

#reset {
  padding: 10px 20px;
  font-size: 16px;
  margin-top: 10px;
}

.highlight {
  background-color: #fffa65 !important;
}