body {
  background-color: #f9fbfd;
  font-family: "Segoe UI", sans-serif;
}

.drop-zone {
  background: #ffffff;
  transition: background 0.3s, border-color 0.3s;
  cursor: pointer;
}

.drop-zone.dragover {
  background-color: #e9f5ff;
  border-color: #0d6efd;
}

.preview-img {
  max-width: 100%;
  max-height: 420px;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.05);
}

.color-palette {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.color-palette div {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.2s ease-in-out;
}

.color-palette div:hover,
.color-palette div.selected {
  border-color: #000;
}