body {
  font-family: Arial, sans-serif;
  background: #f2f2f2;
  text-align: center;
}
h1 {
  margin-top: 20px;
}
.info {
  margin-top: 10px;
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}
#restart {
  background-color: #007BFF;
  color: white;
  border: none;
  padding: 0.5em 1em;
  font-size: 1rem;
  border-radius: 5px;
  cursor: pointer;
}
.board {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: 10px;
  justify-content: center;
  margin: 30px auto;
  max-width: 600px;
}
.card {
  width: 80px;
  height: 80px;
  background: #333;
  color: white;
  font-size: 2em;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  cursor: pointer;
  outline: none;
}
.card.flipped {
  background: #4CAF50;
}
.card:focus {
  outline: 3px solid #ffa500;
}
.visually-hidden {
  position: absolute;
  left: -9999px;
  height: 1px;
  width: 1px;
  overflow: hidden;
}