/* ═══════════════════════════════════════════
   凱吧K歌 - 會員管理後台 CSS
   ═══════════════════════════════════════════ */

:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #16213e;
  --bg-hover: #1f3460;
  --text-primary: #e0e0e0;
  --text-secondary: #8892a4;
  --gold: #ffd700;
  --gold-dark: #b8960f;
  --accent: #e94560;
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #e74c3c;
  --info: #3498db;
  --border: #2a2a4a;
  --sidebar-width: 240px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

/* ═══════════════════════════════════════════
   登入頁
   ═══════════════════════════════════════════ */
#login-page {
  display: none;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #16213e 100%);
}
#login-page.active {
  display: flex;
}
.login-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.login-logo {
  text-align: center;
  margin-bottom: 32px;
}
.login-logo h1 {
  font-size: 2rem;
  color: var(--text-primary);
}
.login-logo .subtitle {
  color: var(--text-secondary);
  margin-top: 8px;
  font-size: 0.9rem;
}
.login-form .form-group {
  margin-bottom: 20px;
}
.login-form label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}
.login-form input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 1rem;
  transition: border-color 0.2s;
}
.login-form input:focus {
  outline: none;
  border-color: var(--gold);
}
.error-msg {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 12px;
  text-align: center;
}

/* ═══════════════════════════════════════════
   主介面佈局
   ═══════════════════════════════════════════ */
.page { display: none; }
.page.active { display: flex; }
#main-app {
  display: none;
  min-height: 100vh;
}
#main-app.active {
  display: flex !important;
}

/* 側邊欄 */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: transform 0.3s;
}
.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
}
.sidebar-header h2 {
  font-size: 1.3rem;
  color: var(--text-primary);
}
.nav-menu {
  list-style: none;
  padding: 12px 0;
  flex: 1;
  overflow-y: auto;
}
.nav-item {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  cursor: pointer;
  transition: background 0.2s;
  border-left: 3px solid transparent;
}
.nav-item:hover {
  background: var(--bg-hover);
}
.nav-item.active {
  background: var(--bg-hover);
  border-left-color: var(--gold);
}
.nav-icon { margin-right: 12px; font-size: 1.1rem; }
.nav-text { font-size: 0.9rem; }
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

/* 主內容 */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.top-bar {
  display: flex;
  align-items: center;
  padding: 16px 24px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.top-bar h3 { flex: 1; font-size: 1.1rem; }
.user-info { font-size: 0.85rem; color: var(--text-secondary); }
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  margin-right: 12px;
}

.content-page {
  display: none;
  padding: 24px;
  flex: 1;
}
.content-page.active { display: block; }

/* ═══════════════════════════════════════════
   元件
   ═══════════════════════════════════════════ */
.gold { color: var(--gold) !important; }
.warning { color: var(--warning) !important; }

/* 按鈕 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  gap: 6px;
}
.btn-primary { background: var(--gold); color: #000; font-weight: 600; }
.btn-primary:hover { background: var(--gold-dark); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-primary); }
.btn-outline:hover { border-color: var(--gold); color: var(--gold); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #c0392b; }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }

/* 統計卡片 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.stat-icon { font-size: 2rem; }
.stat-info h4 { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 4px; }
.stat-value { font-size: 1.5rem; font-weight: 700; }

/* 卡片 */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}
.card h3 { margin-bottom: 16px; font-size: 1rem; }

/* 表格 */
.table-container { overflow-x: auto; }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.data-table th, .data-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.data-table th {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
}
.data-table tr:hover { background: var(--bg-hover); }
.data-table code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.8rem;
}

/* Badge */
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-success { background: rgba(39,174,96,0.2); color: var(--success); }
.badge-warning { background: rgba(243,156,18,0.2); color: var(--warning); }
.badge-danger { background: rgba(231,76,60,0.2); color: var(--danger); }
.badge-info { background: rgba(52,152,219,0.2); color: var(--info); }
.badge-secondary { background: rgba(136,146,164,0.2); color: var(--text-secondary); }

/* 表單 */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.9rem;
}
.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--gold);
}
.form-row {
  display: flex;
  gap: 16px;
}
.form-row .form-group { flex: 1; }
.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

/* 搜尋和篩選 */
.page-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.search-bar {
  display: flex;
  gap: 8px;
}
.search-bar input {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.9rem;
  width: 250px;
}
.filter-bar {
  display: flex;
  gap: 8px;
}
.filter-bar select {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.85rem;
}

/* 分頁 */
.pagination { margin-top: 16px; }
.pagination-btns {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.page-info { color: var(--text-secondary); font-size: 0.85rem; }

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 20px;
}
.modal.active { display: flex; }
.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-sm { max-width: 400px; }
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 1.1rem; }
.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
}
.modal-body { padding: 24px; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* 詳情格 */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.detail-item label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.detail-item span { font-size: 0.9rem; }

/* 序號列表 */
.codes-list {
  max-height: 200px;
  overflow-y: auto;
  background: var(--bg-secondary);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 12px;
}
.code-item {
  padding: 4px 0;
  font-size: 0.85rem;
}

/* 載入中 */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--text-secondary);
}

.rooms-count-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ═══════════════════════════════════════════
   響應式
   ═══════════════════════════════════════════ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
  }
  .mobile-menu-btn {
    display: block;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .search-bar input {
    width: 160px;
  }
  .form-row {
    flex-direction: column;
  }
  .detail-grid {
    grid-template-columns: 1fr;
  }
}

/* Sidebar overlay for mobile - click to close */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 99;
}
.sidebar-overlay.active {
  display: block;
}
@media (max-width: 768px) {
  .sidebar {
    z-index: 100;
  }
}