/* ==========================================================================
   租賃管理計畫 V1 後台管理系統 - 核心商務樣式表
   設計精神：現代專業 Admin Dashboard、高質感商務藍灰配色、乾淨卡片與高清晰排版
   ========================================================================== */

:root {
  --primary-color: #1e3a8a;       /* 深沉海軍藍 */
  --primary-light: #3b82f6;       /* 活力亮藍 */
  --primary-dark: #0f172a;        /* 墨黑藍 */
  --secondary-color: #475569;     /* 碳灰 */
  --bg-main: #f8fafc;             /* 主背景柔和淺灰 */
  --bg-card: #ffffff;             /* 卡片純白 */
  --sidebar-bg: #0f172a;          /* 側邊欄深藍黑 */
  --sidebar-text: #94a3b8;        /* 側邊欄次要字 */
  --sidebar-active: #38bdf8;      /* 側邊欄選中天藍 */
  --border-color: #e2e8f0;        /* 邊框淡灰 */
  --text-primary: #0f172a;        /* 主要文字 */
  --text-muted: #64748b;          /* 次要文字 */
  --success-color: #059669;       /* 翠綠 */
  --warning-color: #d97706;       /* 琥珀橙 */
  --danger-color: #dc2626;        /* 緋紅 */
  --info-color: #0284c7;          /* 靛藍 */
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

/* Layout 架構 */
.app-wrapper {
  display: flex;
  min-height: 100vh;
}

/* Sidebar 側邊欄 */
.app-sidebar {
  width: 260px;
  background-color: var(--sidebar-bg);
  color: var(--sidebar-text);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1040;
  box-shadow: 4px 0 15px rgba(0, 0, 0, 0.05);
}

.sidebar-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sidebar-brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #38bdf8 0%, #2563eb 100%);
  color: #fff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: 0 4px 10px rgba(56, 189, 248, 0.3);
}

.sidebar-brand-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: #f8fafc;
  letter-spacing: -0.02em;
  margin: 0;
  line-height: 1.2;
}

.sidebar-brand-badge {
  font-size: 0.7rem;
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-weight: 600;
}

.sidebar-menu {
  padding: 1rem 0.75rem;
  flex-grow: 1;
  overflow-y: auto;
}

.menu-category {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
  padding: 0.8rem 0.75rem 0.35rem 0.75rem;
  margin-top: 0.4rem;
}

.nav-link-custom {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.65rem 0.85rem;
  color: var(--sidebar-text);
  text-decoration: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  margin-bottom: 2px;
}

.nav-link-custom:hover {
  background-color: rgba(255, 255, 255, 0.06);
  color: #f8fafc;
}

.nav-link-custom.active {
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.25) 0%, rgba(56, 189, 248, 0.15) 100%);
  color: #38bdf8;
  font-weight: 600;
  border-left: 3px solid #38bdf8;
}

.nav-link-custom i {
  font-size: 1.15rem;
  min-width: 22px;
  text-align: center;
}

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.15);
}

/* 主內容區 */
.app-main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100vh;
  overflow-y: auto;
}

/* Top Navbar 頂部導航列 */
.app-navbar {
  background-color: var(--bg-card);
  height: 68px;
  border-bottom: 1px solid var(--border-color);
  padding: 0 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 1020;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.navbar-user-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #e2e8f0;
}

/* 內容頁面主體 */
.page-content {
  padding: 1.75rem;
  flex-grow: 1;
}

/* 面包屑與標題列 */
.page-header {
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.01em;
}

.breadcrumb-custom {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

/* 卡片設計 */
.card-custom {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
  margin-bottom: 1.5rem;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card-custom:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.card-custom .card-header-custom {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  background-color: transparent;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* 指標卡片 Stat Cards */
.stat-card {
  padding: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.stat-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

/* 表格樣式 */
.table-custom {
  width: 100%;
  margin-bottom: 0;
  border-collapse: separate;
  border-spacing: 0;
}

.table-custom thead th {
  background-color: #f8fafc;
  color: #475569;
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.table-custom tbody td {
  padding: 0.95rem 1rem;
  font-size: 0.88rem;
  vertical-align: middle;
  border-bottom: 1px solid #f1f5f9;
  color: #334155;
}

.table-custom tbody tr:hover td {
  background-color: #f8fafc;
}

/* 狀態徽章 (Badge) */
.badge-status {
  padding: 0.35rem 0.65rem;
  font-weight: 600;
  font-size: 0.75rem;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.badge-vacant { background-color: #e0f2fe; color: #0369a1; }
.badge-occupied { background-color: #dcfce7; color: #15803d; }
.badge-inactive { background-color: #f1f5f9; color: #64748b; }

.badge-paid { background-color: #dcfce7; color: #15803d; }
.badge-partial { background-color: #fef3c7; color: #b45309; }
.badge-unpaid { background-color: #fee2e2; color: #b91c1c; }
.badge-void { background-color: #f1f5f9; color: #94a3b8; text-decoration: line-through; }

.badge-active { background-color: #dcfce7; color: #15803d; }
.badge-pending { background-color: #fef3c7; color: #b45309; }
.badge-ended { background-color: #e2e8f0; color: #475569; }

/* 警示框 Alert Banner */
.alert-warning-custom {
  background-color: #fffbeb;
  border: 1px solid #fef3c7;
  color: #92400e;
  border-radius: 10px;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.alert-danger-custom {
  background-color: #fef2f2;
  border: 1px solid #fee2e2;
  color: #991b1b;
  border-radius: 10px;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* 電表卡片 / 模式標籤 */
.badge-template-a {
  background-color: #e0e7ff;
  color: #4338ca;
  font-weight: 700;
  border: 1px solid #c7d2fe;
}

.badge-template-b {
  background-color: #f3e8ff;
  color: #7e22ce;
  font-weight: 700;
  border: 1px solid #e9d5ff;
}

/* 篩選與搜尋列 Filter Bar */
.filter-bar {
  background: #ffffff;
  padding: 1rem 1.25rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  margin-bottom: 1.25rem;
}

/* 表單控制美化 */
.form-control, .form-select {
  border-radius: 8px;
  border: 1px solid #cbd5e1;
  padding: 0.55rem 0.85rem;
  font-size: 0.9rem;
}

.form-control:focus, .form-select:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

/* 租約到期剩餘天數標籤 */
.days-left-tag {
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
}
.days-urgent { background-color: #fee2e2; color: #dc2626; }
.days-warning { background-color: #fef3c7; color: #d97706; }
.days-normal { background-color: #f1f5f9; color: #475569; }

/* 抄表即時試算提示框 */
.meter-calc-box {
  background-color: #f8fafc;
  border: 1px dashed #cbd5e1;
  border-radius: 8px;
  padding: 1rem;
}

/* 退租結算工作台卡片高亮 */
.settlement-summary-card {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  color: #fff;
  border-radius: 12px;
  padding: 1.5rem;
}

/* 模態視窗與彈窗 */
.modal-content {
  border-radius: 14px;
  border: none;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
  border-bottom: 1px solid var(--border-color);
  padding: 1.25rem 1.5rem;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  border-top: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
}

/* 按鈕美化 */
.btn-primary-custom {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  border: none;
  color: #fff;
  font-weight: 600;
  border-radius: 8px;
  padding: 0.55rem 1.2rem;
  transition: all 0.2s ease;
}

.btn-primary-custom:hover {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
  color: #fff;
}

/* 快速操作小按鈕組 */
.btn-action-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-size: 0.85rem;
  border: 1px solid #e2e8f0;
  background-color: #fff;
  color: #475569;
  transition: all 0.15s ease;
}

.btn-action-icon:hover {
  background-color: #f1f5f9;
  color: #0f172a;
  border-color: #cbd5e1;
}

/* Toast 提示浮動 */
.toast-container {
  z-index: 1090;
}

/* 手機與平板適應性 (RWD) */
@media (max-width: 991.98px) {
  .app-sidebar {
    position: fixed;
    height: 100vh;
    left: -260px;
  }
  .app-sidebar.show {
    left: 0;
  }
  .sidebar-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.6);
    z-index: 1030;
  }
  .sidebar-backdrop.show {
    display: block;
  }
}