body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0 2rem;
  background-color: #f9f9f9;
  justify-content: center;
  text-align: center;
}

.hidden { display:none; }

/* 遮罩層：半透明黑色，覆蓋整個畫面 */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);  /* 遮罩層背景半透明黑色 */
  z-index: 999;  /* 在最上層，但低於彈窗 */
}  

/* /* 登入彈窗：白色小視窗，置中顯示  */
.login-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);  /* 置中技巧  */
  background-color: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);  /* 陰影  */
  z-index: 1000;   /* 在遮罩之上  */
  min-width: 300px; /* 彈窗寬度 */
} 

/* 關閉按鈕 */
.close-login {
  position: absolute;
  top: 10px;
  right: 10px;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #999;
}

.close-login:hover {
  color: #333;
}

/* 登入視窗內容 */
.login-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.login-content h2 {
  margin: 0 0 1rem 0;
  text-align: center;
}

.login-content input {
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

.submitLogin {
  padding: 0.75rem;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
}

.submitLogin:hover {
  background-color: #0056b3;
}

#loginBtn {
  position: fixed;
  right: 50px;
  top: 10px;
  z-index: 1000;  /* 確保在最上層 */
  padding: 0.5rem 1rem;
  background-color: #28a745;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: large;
}

#loginBtn:hover {
  background-color: #218838;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem;
  padding: 1.5rem 0;
}

.product-card {
  border: 1px solid #eee;
  border-radius: 8px;
  padding: 0.75rem;
  background-color: #fff;
}

.product-title {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.product-price {
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.add-to-cart {
  display: inline-block;
  width: 250px;
  padding: 0.5rem;
  border: none;
  border-radius: 4px;
  background-color: #007bff;
  color: #fff;
  cursor: pointer;
}

.add-to-cart:hover {
  background-color: #0056b3;
}

.remove-from-cart {
  display: inline-block;
  width: 250px;
  padding: 0.5rem;
  border: none;
  border-radius: 4px;
  background-color: #dc3545;
  color: #fff;
  cursor: pointer;
  margin-top: 0.5rem;
}
.remove-from-cart:hover {
  background-color: #a71d2a;
}

.product-card img {
  width: 150px;
  aspect-ratio: 1 / 1; /* 正方形 */
  object-fit: cover;   /* 以不變形為主，超出就裁掉 */
}