/* ==========================================================================
   Peng Proxy - Minimalist Clean SaaS Design System
   Font: Be Vietnam Pro & Open Sans (Chuẩn Tiếng Việt, Tự nhiên, Chuẩn Studio/Agency, Không AI)
   Căn chỉnh tỉ lệ khối theo chuẩn Webflow & Wix B2B SaaS
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500;600&family=Open+Sans:ital,wght@0,400;0,600;0,700;1,400&display=swap');

:root {
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-hover: #f1f5f9;
  --bg-input: #ffffff;
  --bg-selected: #eff6ff;
  
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-focus: #0f172a;
  
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --color-primary: #0f172a;
  --color-primary-hover: #1e293b;
  --color-accent: #2563eb;
  --color-success: #16a34a;
  --color-warning: #d97706;
  --color-danger: #dc2626;
  
  --font-sans: 'Be Vietnam Pro', 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.06), 0 1px 2px -1px rgba(0, 0, 0, 0.04);
  --shadow-modal: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-bulk: 0 8px 20px rgba(15, 23, 42, 0.12);
  
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-full: 9999px;
  
  --transition: all 0.15s ease;
}

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

body {
  font-family: var(--font-sans);
  background-color: #f8fafc;
  background-image: 
    radial-gradient(at 0% 0%, rgba(226, 232, 240, 0.5) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(219, 234, 254, 0.45) 0px, transparent 50%),
    radial-gradient(#cbd5e1 0.75px, transparent 0.75px);
  background-size: 100% 100%, 100% 100%, 20px 20px;
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   Header (Căn chỉnh cân đối, Kính mờ hiện đại)
   ========================================================================== */
.site-header {
  height: 60px;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-container {
  max-width: 1280px;
  height: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  text-decoration: none;
  color: var(--text-main);
}

.brand-logo-icon {
  width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: #ffffff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ==========================================================================
   Buttons & Form Controls
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 14px;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn.is-loading {
  position: relative;
  pointer-events: none;
  color: transparent !important;
}

.btn.is-loading::after {
  content: '';
  position: absolute;
  width: 15px;
  height: 15px;
  top: 50%;
  left: 50%;
  margin: -7.5px 0 0 -7.5px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: btnSpin 0.6s linear infinite;
}

.btn-primary.is-loading::after {
  border-color: #ffffff;
  border-top-color: transparent;
}

@keyframes btnSpin {
  to { transform: rotate(360deg); }
}

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

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.15);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-main);
  border-color: var(--border-light);
}

.btn-secondary:hover {
  background-color: var(--bg-hover);
  border-color: var(--border-medium);
}

.btn-outline-blue {
  background-color: #ffffff;
  color: var(--color-accent);
  border-color: #bfdbfe;
}

.btn-outline-blue:hover {
  background-color: #eff6ff;
}

.btn-danger {
  background-color: #ffffff;
  color: var(--color-danger);
  border-color: #fecaca;
}

.btn-danger:hover {
  background-color: #fef2f2;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.775rem;
}

/* Form Controls */
.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 8px 12px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(15, 23, 42, 0.08);
}

/* ==========================================================================
   Layout Containers & Page Alignment
   ========================================================================== */
.main-content {
  flex: 1;
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 20px;
  animation: pageFadeIn 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 16px;
  flex-wrap: wrap;
}

.page-title h1 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.page-title p {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  margin-top: 3px;
}

/* Metric Cards Grid */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  box-shadow: var(--shadow-card);
}

.metric-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.metric-value {
  font-size: 1.7rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-main);
  line-height: 1.1;
}

.metric-subtitle {
  font-size: 0.775rem;
  color: var(--text-secondary);
  margin-top: 5px;
}

/* ==========================================================================
   Sticky / Dynamic Bulk Actions Bar (Thanh Thao Tác Hàng Loạt)
   ========================================================================== */
.bulk-action-bar {
  background: var(--color-primary);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 10px 18px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-bulk);
  animation: slideDown 0.15s ease;
  flex-wrap: wrap;
  gap: 12px;
}

@keyframes slideDown {
  from { transform: translateY(-8px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.bulk-action-bar span {
  font-size: 0.85rem;
  font-weight: 600;
}

.bulk-btn-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.bulk-btn-group .btn {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.25);
  font-size: 0.775rem;
  padding: 5px 11px;
}

.bulk-btn-group .btn:hover {
  background: rgba(255, 255, 255, 0.28);
}

.bulk-btn-group .btn-danger {
  background: rgba(239, 68, 68, 0.85);
  color: #ffffff;
  border-color: transparent;
}

/* ==========================================================================
   Card Box & Data Table
   ========================================================================== */
.card-box {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  margin-bottom: 24px;
}

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

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.search-input-wrap {
  position: relative;
  min-width: 220px;
}

.search-input-wrap input {
  padding-left: 30px;
  font-size: 0.8125rem;
}

.search-icon {
  position: absolute;
  left: 9px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.75rem;
  pointer-events: none;
}

/* Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.table-clean {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.8125rem;
}

.table-clean th {
  background: #f8fafc;
  padding: 11px 16px;
  font-weight: 600;
  font-size: 0.725rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
  user-select: none;
}

.table-clean td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
  color: var(--text-main);
  transition: background-color 0.1s ease;
}

.table-clean tr {
  cursor: pointer;
}

.table-clean tr:hover td {
  background-color: var(--bg-hover);
}

.table-clean tr.selected td {
  background-color: var(--bg-selected) !important;
}

.table-clean tr.selected:hover td {
  background-color: #e0f0fe !important;
}

.table-clean tr.selected td:first-child {
  border-left: 3px solid var(--color-accent);
}

/* Proxy Live -> Nền xanh dịu mắt, viền trái xanh */
.table-clean tbody tr.row-status-live td {
  background-color: #f0fdf4 !important;
}

.table-clean tbody tr.row-status-live:hover td {
  background-color: #dcfce7 !important;
}

.table-clean tbody tr.row-status-live td:first-child {
  border-left: 3px solid var(--color-success);
}

/* Proxy DIE -> Nền đỏ cảnh báo, viền trái đỏ */
.table-clean tbody tr.row-status-die td {
  background-color: #fef2f2 !important;
}

.table-clean tbody tr.row-status-die:hover td {
  background-color: #fee2e2 !important;
}

.table-clean tbody tr.row-status-die td:first-child {
  border-left: 3px solid var(--color-danger);
}

/* Khi dòng được chọn đồng thời có trạng thái */
.table-clean tbody tr.selected.row-status-live td {
  background-color: #e6f7ec !important;
}

.table-clean tbody tr.selected.row-status-die td {
  background-color: #fde8e8 !important;
}

/* Sắp xếp cột */
.th-sortable {
  cursor: pointer;
  user-select: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.th-sortable:hover {
  background-color: #f1f5f9;
  color: var(--color-accent);
}

.sort-indicator {
  display: inline-block;
  margin-left: 4px;
  font-size: 0.65rem;
  color: var(--text-muted);
  vertical-align: middle;
}

.sort-indicator.active {
  color: var(--color-accent);
  font-weight: 700;
}

/* User drag selection helper */
.drag-selecting {
  user-select: none !important;
}

.mono-text {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  font-size: 0.725rem;
  font-weight: 600;
}

.badge-residential {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #15803d;
}

.badge-datacenter {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1d4ed8;
}

.badge-live {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #166534;
}

.badge-die {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
}

.badge-protocol {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  background: #f1f5f9;
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
}

.badge-admin {
  background: #fef2f2;
  border: 1px solid #fca5a5;
  color: #b91c1c;
  font-weight: 700;
}

.badge-customer {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1d4ed8;
  font-weight: 600;
}

.cloudflare-sync-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  font-size: 0.8125rem;
}

.cloudflare-sync-bar.offline {
  background: #fffbeb;
  border-color: #fde68a;
}

.sync-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}

.sync-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #16a34a;
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.2);
}

.sync-pulse.offline {
  background: #d97706;
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.2);
}

.pwd-mask-wrap {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.btn-pwd-icon {
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 4px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  border-radius: 4px;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-pwd-icon:hover {
  background: var(--bg-hover);
  color: var(--text-main);
}


/* ==========================================================================
   Admin Navigation Tabs
   ========================================================================== */
.admin-tabs {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 20px;
  overflow-x: auto;
}

.admin-tab-btn {
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.admin-tab-btn:hover {
  color: var(--text-main);
}

.admin-tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ==========================================================================
   Floating Contact Group (Mona Media Style)
   ========================================================================== */
.floating-contact-group {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.floating-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
  transition: transform 0.15s ease;
}

.floating-btn:hover {
  transform: translateY(-2px);
}

.floating-zalo {
  background: #0068ff;
  color: #ffffff;
}

.floating-telegram {
  background: #229ed9;
  color: #ffffff;
}

/* ==========================================================================
   Modals
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background: #ffffff;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.15), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
  transform: scale(0.96) translateY(6px);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-backdrop.active .modal-box {
  transform: scale(1) translateY(0);
}

.modal-head {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-head h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
}

.modal-content-area {
  padding: 18px;
}

.modal-foot {
  padding: 12px 18px;
  background: #f8fafc;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

/* Toast */
.toast-wrap {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 6px;
  pointer-events: none;
}

.toast-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--color-primary);
  color: var(--text-main);
  padding: 9px 13px;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-weight: 500;
  box-shadow: var(--shadow-modal);
  pointer-events: auto;
}

.toast-item.success { border-left-color: var(--color-success); }
.toast-item.error { border-left-color: var(--color-danger); }

/* ==========================================================================
   Sticky Floating Bulk Action Bar (Thanh thao tác hàng loạt nổi chuẩn Figma/Notion)
   ========================================================================== */
.bulk-action-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  background: #0f172a;
  color: #ffffff;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  box-shadow: 0 12px 28px -4px rgba(15, 23, 42, 0.35), 0 6px 12px -4px rgba(15, 23, 42, 0.2);
  display: flex;
  align-items: center;
  gap: 16px;
  animation: slideUpBar 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  font-size: 0.8125rem;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
}

@keyframes slideUpBar {
  from {
    opacity: 0;
    transform: translate(-50%, 15px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

.bulk-btn-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.bulk-btn-group .btn {
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 5px 12px;
  font-size: 0.775rem;
  border-radius: var(--radius-full);
  transition: all 0.15s ease;
}

.bulk-btn-group .btn:hover {
  background: rgba(255, 255, 255, 0.28);
  color: #ffffff;
  transform: translateY(-1px);
}

.bulk-btn-group .btn-danger {
  background: #dc2626 !important;
  color: #ffffff !important;
  border-color: #ef4444 !important;
}

.bulk-btn-group .btn-danger:hover {
  background: #b91c1c !important;
}

/* ==========================================================================
   Enhanced Auth Screen (Ô đăng nhập / đăng ký to, thoáng, chuẩn SaaS)
   ========================================================================== */
.auth-box-wrapper {
  max-width: 440px;
  width: 100%;
  margin: 50px auto;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 14px;
  padding: 36px 32px;
  box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
  animation: pageFadeIn 0.3s ease;
}

.auth-header {
  text-align: center;
  margin-bottom: 24px;
}

.auth-header h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.auth-header p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 5px;
}

.auth-tabs-nav {
  display: flex;
  background: #f1f5f9;
  padding: 4px;
  border-radius: 8px;
  margin-bottom: 22px;
  border: 1px solid var(--border-light);
}

.auth-tab-btn {
  flex: 1;
  padding: 9px 12px;
  border: none;
  background: transparent;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.15s ease;
}

.auth-tab-btn.active {
  background: #ffffff;
  color: var(--text-main);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.auth-input-lg {
  padding: 11px 14px;
  font-size: 0.9375rem;
  border-radius: 8px;
}

.auth-btn-lg {
  width: 100%;
  padding: 12px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 8px;
  margin-top: 10px;
}

/* Toolbar selection pill */
.selection-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #eff6ff;
  color: var(--color-accent);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.775rem;
  font-weight: 600;
  border: 1px solid #bfdbfe;
}

.btn-pill-clear {
  background: none;
  border: none;
  color: var(--color-accent);
  cursor: pointer;
  font-size: 0.775rem;
  font-weight: 700;
  padding: 0 2px;
}
.btn-pill-clear:hover {
  text-decoration: underline;
}

/* Drag to select UX enhancement */
body.drag-selecting {
  user-select: none !important;
  -webkit-user-select: none !important;
  cursor: grabbing !important;
}

body.drag-selecting tr,
body.drag-selecting td,
body.drag-selecting span {
  user-select: none !important;
  -webkit-user-select: none !important;
}

/* ==========================================================================
   Khách Hàng Mới: Mua Proxy Card & VietQR Flow
   ========================================================================== */
.buy-proxy-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 22px;
  box-shadow: var(--shadow-card);
  animation: pageFadeIn 0.25s ease;
}

.buy-proxy-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-light);
}

.buy-proxy-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #eff6ff;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.buy-grid-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.price-summary-bar {
  background: #f8fafc;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.price-total-text {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-accent);
  font-family: var(--font-mono);
}

.pill-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.pill-opt-btn {
  padding: 5px 12px;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-size: 0.775rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--text-secondary);
}

.pill-opt-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: #eff6ff;
}

.pill-opt-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

.btn-edit-expiry-inline {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 2px 4px;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.btn-edit-expiry-inline:hover {
  color: var(--color-accent);
  background: #eff6ff;
}

/* Hiệu ứng chuyển động & di chuột mượt mà 60fps */
.table-clean tbody tr {
  transition: background-color 0.15s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.15s ease;
  cursor: pointer;
}

input[type="checkbox"] {
  cursor: pointer;
  accent-color: var(--color-accent);
  transition: transform 0.14s cubic-bezier(0.16, 1, 0.3, 1);
}

input[type="checkbox"]:hover {
  transform: scale(1.15);
}

.form-control {
  transition: border-color 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease;
}

.form-control:hover {
  border-color: #cbd5e1;
}

.form-control:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.btn {
  transition: all 0.16s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
}

.btn:active {
  transform: translateY(1px) scale(0.98);
}

.metric-card {
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.22s ease, border-color 0.22s ease;
}

.metric-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.07);
  border-color: #cbd5e1;
}

.buy-proxy-card {
  transition: border-color 0.22s ease, box-shadow 0.22s ease;
}

.buy-proxy-card:hover {
  border-color: #93c5fd;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.09);
}

.admin-tab-btn {
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

.admin-tab-btn:hover {
  color: var(--text-main);
  background-color: rgba(241, 245, 249, 0.85);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

@media (max-width: 768px) {
  .header-container { padding: 0 14px; }
  .main-content { padding: 14px; }
  .metric-grid { grid-template-columns: 1fr; }
  .card-toolbar { flex-direction: column; align-items: stretch; }
  .search-input-wrap { min-width: 100%; }
}

/* Floating Contact Widget */
.contact-widget {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
  pointer-events: auto;
}

.widget-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 9999px;
  text-decoration: none;
  font-family: var(--font-body, inherit);
  font-size: 13.5px;
  font-weight: 600;
  color: #ffffff !important;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.16), 0 2px 6px rgba(0, 0, 0, 0.08);
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

.widget-tele {
  background: linear-gradient(135deg, #0088cc 0%, #29b6f6 100%);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.widget-tele:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 6px 22px rgba(0, 136, 204, 0.45);
}

.widget-zalo {
  background: linear-gradient(135deg, #0068FF 0%, #0099ff 100%);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.widget-zalo:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 6px 22px rgba(0, 104, 255, 0.45);
}

.widget-item:active {
  transform: translateY(0) scale(0.98);
}

.widget-icon {
  font-size: 16px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.widget-label {
  letter-spacing: 0.2px;
  white-space: nowrap;
}

@media (max-width: 600px) {
  .contact-widget {
    bottom: 16px;
    right: 16px;
    gap: 8px;
  }
  .widget-item {
    padding: 8px 14px;
    font-size: 12.5px;
  }
}