body {
  font-family: Arial, sans-serif;
  background: #f7f7f7;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 800px;
  margin: 50px auto;
  padding: 30px;
  background: white;
  box-shadow: 0 0 15px rgba(0,0,0,0.1);
  border-radius: 8px;
  text-align: center;
}

h1 {
  margin-bottom: 15px;
}

button {
  padding: 10px 20px;
  background-color: #007bff;
  color: white;
  border: none;
  font-size: 16px;
  border-radius: 5px;
  cursor: pointer;
  margin: 10px 0;
}

button:disabled {
  background-color: #aaa;
  cursor: not-allowed;
}

.grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 20px;
}

.grid img {
  width: 100px;
  height: 100px;
  object-fit: cover;
  border: 2px solid #ddd;
  border-radius: 6px;
}

.controls {
  margin-top: 20px;
}

label {
  display: inline-block;
  margin: 0 10px;
  font-size: 14px;
}

input[type=number] {
  padding: 6px;
  width: 100px;
  margin-left: 5px;
}

#drop-zone {
  border: 2px dashed #aaa;
  padding: 20px;
}