body { 
  margin: 0;
  overflow: hidden;
  font-family: Arial, sans-serif;
}
#container {
  position: relative;
  width: 100%;
  height: 100vh;
}
#info {
  position: absolute;
  top: 10px;
  width: 100%;
  text-align: center;
  color: white;
  padding: 5px;
  background-color: rgba(0,0,0,0.5);
  z-index: 100;
}
#fileInput {
  display: none;
}
#uploadBtn {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 20px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  z-index: 100;
  box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}
#uploadBtn:hover {
  background-color: #45a049;
}

/* 移動設備優化 */
@media (max-width: 768px) {
  #info {
    font-size: 14px;
    padding: 8px 5px;
  }
  #uploadBtn {
    bottom: 80px;
    padding: 12px 20px;
  }
}