.button-container {
  display: flex;
  flex-wrap: wrap;
  padding: 10px;
  margin: 10px; /* Use gap if your target browsers support it */
}

.button-container button {
  width: 400px; /* Fixed width */
  height: 400px; /* Fixed height */
  padding: 5px;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 5px; /* Use margin for cross-browser compatibility if gap doesn't work */
}

.button-container button img {
    max-width: 100%;
    max-height: 100%;
}

/* Style the "+" button differently */
.button-container button.plus-button { /* Add the class "plus-button" to the "+" button */
  font-size: 100px; /* Or a suitable large font size */
  background-color: lightgray; /* Example background color */
  border-radius: 5px; /* Example border-radius */
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .button-container {
    flex-direction: column;
  }
  .button-container button {
      margin: 5px 0; /* Adjust margins for vertical stacking */
  }
}