/* ===== 全域字型與色彩變數 ===== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;700;900&display=swap');

:root {
  --bg-dark:       #0f0e17;        /* 深色背景 */
  --bg-card:       #1a1929;        /* 卡片背景 */
  --bg-cart:       #13121f;        /* 購物車背景 */
  --accent-amber:  #ffbe0b;        /* 主色：琥珀黃 */
  --accent-rose:   #ff6b6b;        /* 輔色：玫瑰紅 */
  --accent-teal:   #4ecdc4;        /* 輔色：青綠 */
  --text-white:    #f5f5f5;        /* 主文字白 */
  --text-muted:    #8a8a9a;        /* 次要文字 */
  --border-color:  rgba(255,255,255,0.07);
  --radius-card:   18px;
  --radius-btn:    50px;
  --shadow-glow:   0 0 20px rgba(255,190,11,0.25);
  --transition:    0.25s ease;
}

/* ===== 重置 & 基礎 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Noto Sans TC', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-white);
  min-height: 100vh;
  /* 極細的星點背景紋理 */
  background-image:
    radial-gradient(circle at 20% 20%, rgba(78,205,196,0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255,107,107,0.06) 0%, transparent 50%);
}

/* ===== 頂部 Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15,14,23,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  max-width: 1300px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 2rem;
  filter: drop-shadow(0 0 8px rgba(255,190,11,0.7));
  animation: float 3s ease-in-out infinite;
}

/* 浮動動畫 */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-5px); }
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent-amber), var(--accent-rose));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 購物車切換按鈕（手機版顯示） */
.cart-toggle-btn {
  display: none; /* 桌機版隱藏 */
  position: relative;
  background: var(--accent-amber);
  color: #000;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-btn);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  font-family: 'Noto Sans TC', sans-serif;
}

.cart-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-rose);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 900;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  margin-left: 6px;
}

/* ===== 主體佈局（左選單 + 右購物車） ===== */
.main-layout {
  max-width: 1300px;
  margin: 0 auto;
  padding: 32px 24px;
  display: grid;
  grid-template-columns: 1fr 380px; /* 左邊彈性寬，右邊固定 */
  gap: 28px;
  align-items: start;
}

/* ===== 左側：選單區 ===== */
.menu-section {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* 類別篩選標籤列 */
.category-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 9px 20px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-btn);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Noto Sans TC', sans-serif;
}

.tab-btn:hover {
  border-color: var(--accent-amber);
  color: var(--accent-amber);
}

/* 選中狀態 */
.tab-btn.active {
  background: var(--accent-amber);
  border-color: var(--accent-amber);
  color: #000;
  font-weight: 700;
  box-shadow: var(--shadow-glow);
}

/* ===== 飲料卡片格線 ===== */
.drink-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

/* 單張飲料卡片 */
.drink-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 24px 18px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

/* 卡片懸停光暈 */
.drink-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(255,190,11,0.08), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none; /* 避免阻擋卡片及按鈕的點擊與懸停事件 */
}

.drink-card:hover::before { opacity: 1; }

.drink-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.4), var(--shadow-glow);
  border-color: rgba(255,190,11,0.35);
}

/* 飲料表情符號（大圖示） */
.drink-emoji {
  font-size: 3rem;
  line-height: 1;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.4));
}

/* 飲料名稱 */
.drink-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  text-align: center;
}

/* 類別標籤 */
.drink-category {
  font-size: 0.75rem;
  color: var(--accent-teal);
  background: rgba(78,205,196,0.12);
  padding: 3px 10px;
  border-radius: 20px;
}

/* 價格 */
.drink-price {
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--accent-amber);
}

/* 加入購物車按鈕 */
.add-btn {
  width: 100%;
  margin-top: 6px;
  padding: 10px;
  background: linear-gradient(135deg, var(--accent-amber), #ff9500);
  border: none;
  border-radius: var(--radius-btn);
  color: #000;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Noto Sans TC', sans-serif;
}

.add-btn:hover {
  transform: scale(1.04);
  box-shadow: 0 4px 16px rgba(255,190,11,0.5);
}

.add-btn:active { transform: scale(0.97); }

/* ===== 右側：購物車 ===== */
.cart-section {
  background: var(--bg-cart);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  /* 購物車固定在視窗右側 */
  position: sticky;
  top: 90px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

/* 滾動條美化 */
.cart-section::-webkit-scrollbar { width: 4px; }
.cart-section::-webkit-scrollbar-track { background: transparent; }
.cart-section::-webkit-scrollbar-thumb { background: var(--accent-amber); border-radius: 4px; }

.cart-title {
  font-size: 1.2rem;
  font-weight: 700;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 14px;
}

/* ===== 空購物車提示 ===== */
.cart-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 32px 0;
  color: var(--text-muted);
}

.cart-empty-icon {
  font-size: 2.5rem;
  opacity: 0.5;
}

/* 隱藏元素 */
.hidden { display: none !important; }

/* ===== 購物車品項 ===== */
.cart-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  animation: slideIn 0.2s ease;
}

/* 新增品項滑入動畫 */
@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

.cart-item-emoji { font-size: 1.6rem; }

.cart-item-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cart-item-name {
  font-size: 0.95rem;
  font-weight: 600;
}

.cart-item-price {
  font-size: 0.85rem;
  color: var(--accent-amber);
}

/* 數量控制器 */
.qty-control {
  display: flex;
  align-items: center;
  gap: 8px;
}

.qty-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--border-color);
  background: transparent;
  color: var(--text-white);
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.qty-btn:hover {
  border-color: var(--accent-amber);
  color: var(--accent-amber);
  background: rgba(255,190,11,0.1);
}

.qty-num {
  font-size: 1rem;
  font-weight: 700;
  min-width: 20px;
  text-align: center;
}

/* ===== 購物車底部（合計 + 按鈕） ===== */
.cart-footer {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.cart-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.1rem;
  font-weight: 700;
}

.cart-total span:last-child {
  color: var(--accent-amber);
  font-size: 1.4rem;
}

/* 結帳按鈕 */
.checkout-btn {
  padding: 14px;
  background: linear-gradient(135deg, var(--accent-amber), #ff9500);
  border: none;
  border-radius: var(--radius-btn);
  color: #000;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Noto Sans TC', sans-serif;
}

.checkout-btn:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-glow);
}

/* 清空按鈕 */
.clear-btn {
  padding: 11px;
  background: transparent;
  border: 1.5px solid rgba(255,107,107,0.4);
  border-radius: var(--radius-btn);
  color: var(--accent-rose);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Noto Sans TC', sans-serif;
}

.clear-btn:hover {
  background: rgba(255,107,107,0.1);
  border-color: var(--accent-rose);
}

/* ===== 結帳成功彈窗 ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

/* 彈窗顯示狀態 */
.modal-overlay.show {
  opacity: 1;
  pointer-events: all;
}

.modal-box {
  background: var(--bg-card);
  border: 1px solid rgba(255,190,11,0.3);
  border-radius: 24px;
  padding: 48px 36px;
  text-align: center;
  max-width: 380px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), var(--shadow-glow);
  transform: scale(0.85);
  transition: transform 0.3s ease;
}

.modal-overlay.show .modal-box {
  transform: scale(1);
}

.modal-icon {
  font-size: 4rem;
  margin-bottom: 16px;
  animation: pop 0.4s ease;
}

@keyframes pop {
  0%   { transform: scale(0); }
  70%  { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--accent-amber);
}

.modal-msg {
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.modal-close-btn {
  padding: 12px 40px;
  background: linear-gradient(135deg, var(--accent-amber), #ff9500);
  border: none;
  border-radius: var(--radius-btn);
  color: #000;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  font-family: 'Noto Sans TC', sans-serif;
  transition: var(--transition);
}

.modal-close-btn:hover { transform: scale(1.05); }

/* ===== 甜度與冰塊客製化按鈕 ===== */
.option-btn {
  padding: 10px 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1.5px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-white);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Noto Sans TC', sans-serif;
  text-align: center;
}

.option-btn:hover {
  border-color: rgba(255, 190, 11, 0.5);
  background: rgba(255, 190, 11, 0.05);
}

.option-btn.active {
  background: rgba(255, 190, 11, 0.15);
  border-color: var(--accent-amber);
  color: var(--accent-amber);
  font-weight: 700;
  box-shadow: 0 0 10px rgba(255, 190, 11, 0.15);
}

/* 購物車品項客製化標籤 */
.cart-item-spec {
  font-size: 0.75rem;
  color: var(--accent-teal);
  background: rgba(78, 205, 196, 0.08);
  border: 1px solid rgba(78, 205, 196, 0.15);
  padding: 2px 8px;
  border-radius: 6px;
  margin-top: 4px;
  display: inline-block;
  width: fit-content;
}

/* ===== 響應式：手機版 ===== */
@media (max-width: 768px) {
  .main-layout {
    grid-template-columns: 1fr; /* 手機改成單欄 */
    padding: 16px;
  }

  /* 手機版購物車：預設收起，按鈕切換 */
  .cart-section {
    position: fixed;
    right: -100%;
    top: 0;
    bottom: 0;
    width: 85%;
    max-width: 360px;
    border-radius: 24px 0 0 24px;
    z-index: 200;
    transition: right 0.3s ease;
    overflow-y: auto;
    padding-top: 60px;
  }

  /* 購物車展開狀態 */
  .cart-section.open {
    right: 0;
  }

  .cart-toggle-btn { display: flex; align-items: center; }

  .drink-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }
}