.upload-label {
  display: block;
  cursor: pointer;
}

.upload-area {
  color: var(--color-fg-sub);
  padding: 3rem 2rem;
  text-align: center;
}

.upload-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  opacity: 0.5;
}

model-viewer {
  min-width: 100%;
  min-height: 300px;
  box-sizing: border-box;
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  color: var(--color-fg-sub);
}

.loading::after { 
  content: "変換中...";
  animation: dots 1.5s infinite;
}

@keyframes dots {
  0%, 20% {
    content: "変換中.";
  }
  40% {
    content: "変換中..";
  }
  60%, 100% {
    content: "変換中...";
  }
}