/* Center the page content */
body {
  display: flex;
  justify-content: center;
}

/* Set a max width for the page content */
.container {
  max-width: 1000px;
  margin: 0 auto;
}

/* Style the pixel grid */
.grid {
  display: grid;
  grid-template-columns: repeat(100, 10px);
  grid-template-rows: repeat(100, 10px);
  gap: 1px;
  border: 1px solid #333;
}

.grid div {
  background-color: #fff;
}

/* Style the purchased pixels */
.grid div.purchased {
  background-color: #000;
}

/* Style the form for uploading images */
form {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 20px;
}

form input {
  margin-bottom: 10px;
}

form button {
  padding: 10px;
  background-color: #333;
  color: #fff;
  border: none;
  cursor: pointer;
}