body {
  font-family: Arial, sans-serif;
  background-color: #f4f6f9;
  display: flex;
  justify-content: center;
  padding: 20px;
}

.container {
  background: white;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  max-width: 450px;
  width: 100%;
  text-align: center;
  box-sizing: border-box;
}

/* 修正：讓下拉選單可以完整拉開、文字不被吃掉 */
select {
  width: 100%;
  padding: 12px;
  margin-top: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 16px;
  background-color: #fff;
  cursor: pointer;
  box-sizing: border-box;
  appearance: auto; /* 保留系統預設的下拉箭頭與展開選單 */
}

/* 增加選項的高度與字體大小，方便點擊 */
select option {
  padding: 10px;
  font-size: 16px;
}

button {
  width: 100%;
  padding: 12px;
  margin-top: 15px;
  border-radius: 6px;
  border: none;
  background-color: #007bff;
  color: white;
  font-size: 16px;
  cursor: pointer;
  box-sizing: border-box;
}

button:hover { 
  background-color: #0056b3; 
}

.camera-box {
  margin: 15px 0;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  height: 250px;
}

video { 
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
}