/* ==========================================================================
   雲端庫存管理系統 (Inventory Pro) - 全域樣式與變數設計
   ========================================================================== */

:root {
  /* 精緻奶油與暗藍灰色調調色盤 */
  --bg-gradient: linear-gradient(135deg, #fdfbf7 0%, #f5f0e6 100%);
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: rgba(79, 70, 229, 0.1);
  --success: #10b981;
  --success-hover: #059669;
  --success-light: rgba(16, 185, 129, 0.1);
  --danger: #f43f5e;
  --danger-hover: #e11d48;
  --danger-light: rgba(244, 63, 94, 0.1);
  --warning: #f59e0b;
  
  /* 文字顏色 */
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-white: #ffffff;
  
  /* 陰影與圓角 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 25px rgba(67, 56, 202, 0.06);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.08);
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
  
  /* 磨砂玻璃 (Glassmorphism) */
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.6);
  
  /* 動態過渡時間 */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 重設基礎設定 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Outfit', 'Noto Sans TC', sans-serif;
  background: var(--bg-gradient);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.6;
  padding: 2rem 1.5rem;
  display: flex;
  justify-content: center;
}

/* 主容器 */
.app-container {
  width: 100%;
  max-width: 1200px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* ==========================================================================
   頂部標題區 (Header)
   ========================================================================== */

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.icon-box {
  font-size: 2.2rem;
  background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
  padding: 0.5rem;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-area h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #312e81 0%, #4f46e5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.status-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
  border-radius: 50px;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success);
  border-radius: 50%;
  position: relative;
}

.status-dot.online::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: var(--success);
  border-radius: 50%;
  animation: pulse 1.8s infinite ease-in-out;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(2.5); opacity: 0; }
}

/* ==========================================================================
   數據看板區 (Dashboard Statistics)
   ========================================================================== */

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(79, 70, 229, 0.2);
}

.stat-icon {
  font-size: 2rem;
  padding: 0.75rem;
  background: #fafaf9;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-sm);
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

.stat-info h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 0.25rem;
}

/* ==========================================================================
   主要內容版面 (Main Layout)
   ========================================================================== */

.main-content {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 1.5rem;
  align-items: start;
}

/* 當螢幕較窄時，自動切換為單欄 */
@media (max-width: 900px) {
  .main-content {
    grid-template-columns: 1fr;
  }
}

/* 玻璃卡片基礎設定 */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.card-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   表單控制項 (Forms)
   ========================================================================== */

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

input[type="text"],
input[type="number"] {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: var(--border-radius-sm);
  background-color: rgba(255, 255, 255, 0.6);
  color: var(--text-main);
  outline: none;
  transition: var(--transition);
}

input:focus {
  border-color: var(--primary);
  background-color: #ffffff;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.button-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* 按鈕樣式 */
.btn {
  width: 100%;
  padding: 0.85rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.btn-primary {
  background-color: var(--primary);
  color: var(--text-white);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: #e2e8f0;
  color: #475569;
}

.btn-secondary:hover {
  background-color: #cbd5e1;
}

.hidden {
  display: none !important;
}

/* ==========================================================================
   庫存列表區 (Table and List)
   ========================================================================== */

.table-card {
  padding: 1.5rem;
}

.table-header-action {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.btn-refresh {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(79, 70, 229, 0.2);
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
}

.btn-refresh:hover {
  background: var(--primary);
  color: var(--text-white);
  transform: rotate(15deg);
}

.table-container {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
}

.inventory-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.inventory-table th {
  background-color: rgba(241, 245, 249, 0.8);
  padding: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border-color);
}

.inventory-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.4);
  transition: var(--transition);
}

.inventory-table tr:hover td {
  background-color: rgba(248, 250, 252, 0.9);
}

/* 載入中與空資料狀態 */
.loading-state,
.empty-state {
  text-align: center;
  padding: 3rem !important;
  color: var(--text-muted);
  font-weight: 500;
}

/* 表格內的特殊樣式 */
.prod-name {
  font-weight: 600;
  color: var(--text-main);
}

.prod-price {
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
}

.prod-qty {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

/* 根據數量給予不同提示色 */
.qty-low {
  background-color: var(--danger-light);
  color: var(--danger);
}

.qty-ok {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--warning);
}

.qty-high {
  background-color: var(--success-light);
  color: var(--success);
}

.prod-total {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  color: var(--primary);
}

/* 調整與管理按鈕 */
.actions-header {
  text-align: center;
}

.action-cell {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

.btn-action {
  padding: 0.35rem 0.65rem;
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* 庫存微調按鈕 (+1 / -1) */
.btn-qty-add {
  background-color: var(--success-light);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.btn-qty-add:hover {
  background-color: var(--success);
  color: var(--text-white);
  transform: translateY(-1px);
}

.btn-qty-sub {
  background-color: var(--danger-light);
  color: var(--danger);
  border: 1px solid rgba(244, 63, 94, 0.2);
}

.btn-qty-sub:hover {
  background-color: var(--danger);
  color: var(--text-white);
  transform: translateY(-1px);
}

/* 管理按鈕 */
.btn-edit {
  background-color: var(--primary-light);
  color: var(--primary);
}

.btn-edit:hover {
  background-color: var(--primary);
  color: var(--text-white);
  transform: translateY(-1px);
}

.btn-delete {
  background-color: #fee2e2;
  color: #ef4444;
}

.btn-delete:hover {
  background-color: #ef4444;
  color: var(--text-white);
  transform: translateY(-1px);
}

/* ==========================================================================
   頁尾 (Footer)
   ========================================================================== */

.app-footer {
  text-align: center;
  padding: 1.5rem 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(226, 232, 240, 0.5);
}

/* ==========================================================================
   會員登入/註冊外掛樣式 (Auth Add-on Styles)
   ========================================================================== */

.header-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.auth-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-auth {
  padding: 0.5rem 1rem !important;
  font-size: 0.85rem !important;
  width: auto !important;
}

.btn-auth-primary {
  background-color: var(--primary) !important;
  color: var(--text-white) !important;
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.15) !important;
}

.btn-auth-primary:hover {
  background-color: var(--primary-hover) !important;
}

.btn-auth-secondary {
  background-color: rgba(255, 255, 255, 0.8) !important;
  color: var(--text-main) !important;
  border: 1px solid rgba(148, 163, 184, 0.3) !important;
}

.btn-auth-secondary:hover {
  background-color: rgba(248, 250, 252, 1) !important;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(79, 70, 229, 0.05);
  border: 1px solid rgba(79, 70, 229, 0.15);
  padding: 0.4rem 0.85rem;
  border-radius: 50px;
}

.user-avatar {
  font-size: 1.1rem;
}

.username-display {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
}

.btn-logout {
  background: none;
  border: none;
  color: var(--danger);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  transition: var(--transition);
}

.btn-logout:hover {
  background-color: var(--danger-light);
  color: var(--danger-hover);
}

/* 會員彈窗 */
.auth-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(30, 41, 59, 0.4);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: var(--transition);
}

.auth-modal-card {
  width: 100%;
  max-width: 400px;
  position: relative;
  animation: modalFadeIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  padding: 2.5rem;
}

@keyframes modalFadeIn {
  from {
    transform: translateY(20px) scale(0.95);
    opacity: 0;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

.btn-close-modal {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.btn-close-modal:hover {
  color: var(--text-main);
  transform: rotate(90deg);
}

.auth-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  text-align: center;
  margin-bottom: 0.25rem;
}

.auth-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 1.75rem;
}

.btn-auth-submit {
  margin-top: 1.25rem;
}

.auth-switch-prompt {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 1.5rem;
}

.btn-link {
  background: none;
  border: none;
  color: var(--primary);
  font-weight: 600;
  cursor: pointer;
  margin-left: 0.25rem;
  transition: var(--transition);
  text-decoration: underline;
}

.btn-link:hover {
  color: var(--primary-hover);
}