body {
  font-family: sans-serif;
  background: #eef6ff;
  text-align: center;
}

.grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  max-width: 600px;
  margin: 20px auto;
}

.cell {
  padding: 10px;
  border: 2px solid #0077cc;
  border-radius: 6px;
  background: white;
  cursor: pointer;
}

.sold {
  background: #ccc;
  text-decoration: line-through;
  color: #666;
}