/**
 * Giao diện Quản trị Thống kê Khách hàng Web Nhanh
 * Thiết kế hiện đại, tinh gọn, tối ưu trải nghiệm Mobile và Desktop
 */

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --info: #0ea5e9;
  --info-light: #f0f9ff;

  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --border-color: #e2e8f0;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --sidebar-w: 260px;
  --header-h: 70px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background-color: #ffffff;
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 50;
  transition: transform 0.25s ease-in-out;
}

.sidebar-header {
  height: var(--header-h);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.35);
}

.brand-text h1 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-text span {
  font-size: 11px;
  color: var(--text-muted);
  display: block;
}

.sidebar-nav {
  flex: 1;
  padding: 20px 14px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s ease;
}

.nav-item svg {
  width: 18px;
  height: 18px;
  stroke-width: 2;
}

.nav-item:hover {
  background-color: var(--primary-light);
  color: var(--primary);
}

.nav-item.active {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}

.nav-item.active svg {
  stroke: #ffffff;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
  background-color: #fafbfc;
}

.user-badge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.user-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #e2e8f0;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 13px;
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-info .user-email {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-info .user-role {
  font-size: 11px;
  color: var(--text-muted);
}

.btn-logout {
  color: var(--text-muted);
  background: none;
  border: none;
  padding: 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: color 0.15s ease;
}

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

/* Main Content Area */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* Top Navbar */
.topbar {
  height: var(--header-h);
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 40;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-main);
}

.page-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.snapshot-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 20px;
  background-color: var(--success-light);
  color: #065f46;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid #a7f3d0;
}

.snapshot-pill .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.4);
}

/* Main Content Body */
.content-body {
  padding: 28px;
  flex: 1;
}

/* Stat KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.kpi-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}

.kpi-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.kpi-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--card-accent, var(--primary));
}

.kpi-card.accent-primary { --card-accent: var(--primary); }
.kpi-card.accent-success { --card-accent: var(--success); }
.kpi-card.accent-warning { --card-accent: var(--warning); }
.kpi-card.accent-danger  { --card-accent: var(--danger); }
.kpi-card.accent-info    { --card-accent: var(--info); }

.kpi-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.kpi-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.kpi-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-light);
  color: var(--primary);
}

.kpi-card.accent-success .kpi-icon { background: var(--success-light); color: var(--success); }
.kpi-card.accent-warning .kpi-icon { background: var(--warning-light); color: var(--warning); }
.kpi-card.accent-danger  .kpi-icon { background: var(--danger-light);  color: var(--danger); }
.kpi-card.accent-info    .kpi-icon { background: var(--info-light);    color: var(--info); }

.kpi-value {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
  margin-bottom: 6px;
}

.kpi-subtitle {
  font-size: 12px;
  color: var(--text-muted);
}

/* Card Container */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 28px;
  overflow: hidden;
}

.card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #ffffff;
  flex-wrap: wrap;
  gap: 12px;
}

.card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-body {
  padding: 24px;
}

/* Grid Rows */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 28px;
}

/* Data Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
  text-align: left;
}

.data-table th {
  background-color: #f8fafc;
  color: var(--text-muted);
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid #f1f5f9;
  color: var(--text-main);
  vertical-align: middle;
}

.data-table tr:last-child td {
  border-bottom: none;
}

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

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  line-height: 1.2;
}

.badge-success { background: var(--success-light); color: #047857; border: 1px solid #a7f3d0; }
.badge-danger  { background: var(--danger-light);  color: #b91c1c; border: 1px solid #fecaca; }
.badge-warning { background: var(--warning-light); color: #b45309; border: 1px solid #fde68a; }
.badge-info    { background: var(--info-light);    color: #0369a1; border: 1px solid #bae6fd; }
.badge-purple  { background: #faf5ff; color: #7e22ce; border: 1px solid #e9d5ff; }
.badge-gray    { background: #f1f5f9; color: #475569; border: 1px solid #cbd5e1; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-sm {
  padding: 4px 10px;
  font-size: 11px;
  border-radius: var(--radius-sm);
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}

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

.btn-outline {
  background-color: #ffffff;
  border-color: var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover {
  background-color: #f8fafc;
  border-color: #cbd5e1;
}

.btn-success {
  background-color: var(--success);
  color: #ffffff;
}

.btn-success:hover {
  background-color: #059669;
}

/* Filter controls */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.filter-select, .filter-input {
  padding: 7px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--text-main);
  background-color: #fff;
  outline: none;
}

.filter-select:focus, .filter-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}

/* PII Reveal Control */
.pii-wrapper {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pii-masked {
  font-family: monospace;
  font-size: 12px;
  color: var(--text-muted);
}

.btn-reveal {
  padding: 2px 6px;
  font-size: 10px;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  cursor: pointer;
  color: var(--primary);
}

.btn-reveal:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}

/* Charts container */
.chart-container {
  position: relative;
  width: 100%;
  height: 280px;
}

/* Alert Boxes */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 13px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.alert-danger {
  background-color: var(--danger-light);
  color: #991b1b;
  border: 1px solid #fecaca;
}

.alert-warning {
  background-color: var(--warning-light);
  color: #92400e;
  border: 1px solid #fde68a;
}

/* Backdrop for Mobile */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.5);
  z-index: 45;
}

/* Login Page Styling */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 440px;
  background: #ffffff;
  border-radius: 20px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
  padding: 40px;
  text-align: center;
}

.login-logo {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: #fff;
  font-size: 32px;
  box-shadow: 0 10px 20px rgba(79, 70, 229, 0.4);
}

.login-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.btn-vaway-login {
  width: 100%;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #4f46e5 0%, #4338ca 100%);
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.35);
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-vaway-login:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
}

.login-footer {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Toast */
.toast-msg {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #1e293b;
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 13px;
  z-index: 100;
  box-shadow: var(--shadow-lg);
  display: none;
}

/* Responsive Mobile Rules */
@media (max-width: 991px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-backdrop.open {
    display: block;
  }
  .main-wrapper {
    margin-left: 0;
  }
  .mobile-toggle {
    display: flex;
  }
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .content-body {
    padding: 18px;
  }
}