/* Offline-friendly UI (Bootstrap 5–compatible subset for WG Panel) */
:root {
  --bs-body-bg: #f8f9fa;
  --bs-body-color: #212529;
  --bs-primary: #0d6efd;
  --bs-success: #198754;
  --bs-warning: #ffc107;
  --bs-danger: #dc3545;
  --bs-secondary: #6c757d;
  --bs-dark: #212529;
  --bs-border-color: #dee2e6;
  --bs-link-color: #0d6efd;
}

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

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--bs-body-color);
  background: var(--bs-body-bg);
}

a { color: var(--bs-link-color); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding-left: 12px;
  padding-right: 12px;
}

.container-fluid {
  width: 100%;
  padding-left: 12px;
  padding-right: 12px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin-left: -8px;
  margin-right: -8px;
}

.row > * { padding-left: 8px; padding-right: 8px; }

.g-3 > * { margin-bottom: 12px; }
.g-4 > * { margin-bottom: 16px; }

.col-12 { flex: 0 0 100%; max-width: 100%; }
.col-6 { flex: 0 0 50%; max-width: 50%; }
.col-md-2, .col-md-3, .col-md-4, .col-md-6,
.col-lg-2, .col-lg-5, .col-lg-7, .col-sm-4, .col-sm-8 {
  flex: 0 0 100%;
  max-width: 100%;
}

@media (min-width: 768px) {
  .col-md-2 { flex: 0 0 16.666%; max-width: 16.666%; }
  .col-md-3 { flex: 0 0 25%; max-width: 25%; }
  .col-md-4 { flex: 0 0 33.333%; max-width: 33.333%; }
  .col-md-6 { flex: 0 0 50%; max-width: 50%; }
  .col-sm-4 { flex: 0 0 33.333%; max-width: 33.333%; }
  .col-sm-8 { flex: 0 0 66.666%; max-width: 66.666%; }
}

@media (min-width: 992px) {
  .col-lg-2 { flex: 0 0 16.666%; max-width: 16.666%; }
  .col-lg-5 { flex: 0 0 41.666%; max-width: 41.666%; }
  .col-lg-7 { flex: 0 0 58.333%; max-width: 58.333%; }
}

.py-4 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.me-3 { margin-right: 1rem; }
.me-auto { margin-right: auto; }

.d-flex { display: flex; }
.d-inline { display: inline; }
.flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: 0.5rem; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }
.align-items-start { align-items: flex-start; }
.align-middle { vertical-align: middle; }
.text-center { text-align: center; }
.text-end { text-align: right; }
.text-muted { color: var(--bs-secondary); }
.text-warning { color: #997404; }

.h3 { font-size: 1.75rem; font-weight: 500; margin: 0 0 0.5rem; }
.h4 { font-size: 1.5rem; font-weight: 500; }
.h5 { font-size: 1.25rem; font-weight: 500; }
.small { font-size: 0.875em; }

/* Navbar */
.navbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  padding: 0.5rem 0;
}

.navbar-dark { background: var(--bs-dark); color: #fff; }
.navbar-dark a { color: rgba(255, 255, 255, 0.9); }
.navbar-dark a:hover { color: #fff; }
.bg-dark { background: var(--bs-dark) !important; }

.navbar-brand {
  font-size: 1.25rem;
  font-weight: 600;
  margin-right: 1rem;
  color: #fff;
}

.navbar-nav {
  display: flex;
  flex-direction: column;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.25rem;
}

.nav-link { padding: 0.5rem 0.75rem; display: block; }
.navbar-text { padding: 0.5rem 0; color: rgba(255, 255, 255, 0.75); }

.navbar-toggler {
  display: none;
  border: 0;
  background: transparent;
  color: #fff;
  padding: 0.5rem;
  border-radius: 0.375rem;
  cursor: pointer;
  line-height: 0;
}

.hamburger-icon {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 1.5rem;
  height: 1.125rem;
}

.hamburger-icon span {
  display: block;
  height: 2px;
  width: 100%;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.hamburger-btn.is-active .hamburger-icon span:nth-child(1) {
  transform: translateY(0.46rem) rotate(45deg);
}

.hamburger-btn.is-active .hamburger-icon span:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.is-active .hamburger-icon span:nth-child(3) {
  transform: translateY(-0.46rem) rotate(-45deg);
}

@media (max-width: 991.98px) {
  .navbar-expand-lg .navbar-toggler { display: inline-flex; align-items: center; justify-content: center; }
  .navbar-expand-lg .navbar-collapse {
    display: block;
  }
}

@media (min-width: 992px) {
  .navbar-expand-lg .navbar-collapse {
    display: flex !important;
    flex-grow: 1;
    align-items: center;
  }
  .navbar-expand-lg .navbar-nav { flex-direction: row; }
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  text-align: center;
  border: 1px solid transparent;
  border-radius: 0.375rem;
  cursor: pointer;
  text-decoration: none;
  background: #e9ecef;
  color: #212529;
}

.btn:hover { filter: brightness(0.95); text-decoration: none; }
.btn-sm { padding: 0.25rem 0.5rem; font-size: 0.875rem; }
.btn-primary { background: var(--bs-primary); border-color: var(--bs-primary); color: #fff; }
.btn-success { background: var(--bs-success); border-color: var(--bs-success); color: #fff; }
.btn-link { background: transparent; border: none; color: var(--bs-link-color); }
.btn-outline-light { background: transparent; border-color: #f8f9fa; color: #f8f9fa; }
.btn-outline-primary { background: transparent; border-color: var(--bs-primary); color: var(--bs-primary); }
.btn-outline-secondary { background: transparent; border-color: var(--bs-secondary); color: var(--bs-secondary); }
.btn-outline-warning { background: transparent; border-color: var(--bs-warning); color: #664d03; }
.btn-outline-danger { background: transparent; border-color: var(--bs-danger); color: var(--bs-danger); }
.btn-outline-info { background: transparent; border-color: #0dcaf0; color: #087990; }
.text-bg-warning { background: var(--bs-warning); color: #000; }
.w-100 { width: 100%; }
.align-items-end { align-items: flex-end; }

.form-check-input {
  width: 1em;
  height: 1em;
  margin: 0;
  cursor: pointer;
}

.bulk-toolbar .card-body { padding: 1rem; }

/* Cards */
.card {
  background: #fff;
  border: 1px solid var(--bs-border-color);
  border-radius: 0.5rem;
  overflow: hidden;
}

.card-header {
  padding: 0.75rem 1rem;
  background: #f8f9fa;
  border-bottom: 1px solid var(--bs-border-color);
  font-weight: 600;
}

.card-body { padding: 1rem; }

/* Tables */
.table-responsive { overflow-x: auto; }

.table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

.table th,
.table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--bs-border-color);
  text-align: left;
}

.table thead th { background: #f8f9fa; font-weight: 600; }
.table-striped tbody tr:nth-child(odd) { background: #f8f9fa; }
.table-warning { background: #fff3cd !important; }

.sort-link {
  color: inherit;
  text-decoration: none;
  white-space: nowrap;
}
.sort-link:hover { text-decoration: underline; }
.sort-active { font-weight: 600; }

/* Forms */
.form-label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 500;
}

.form-control,
.form-select {
  display: block;
  width: 100%;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  border: 1px solid #ced4da;
  border-radius: 0.375rem;
  background: #fff;
}

.form-control:focus,
.form-select:focus {
  outline: 2px solid rgba(13, 110, 253, 0.35);
  border-color: var(--bs-primary);
}

textarea.form-control { min-height: 80px; resize: vertical; }

.form-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 1.5rem;
}

.form-text { font-size: 0.875em; color: var(--bs-secondary); margin-top: 0.25rem; }

/* Alerts & badges */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
}

.alert-danger { background: #f8d7da; border-color: #f5c2c7; color: #842029; }
.alert-success { background: #d1e7dd; border-color: #badbcc; color: #0f5132; }
.alert-secondary { background: #e2e3e5; border-color: #d3d6d8; color: #41464b; }

.badge {
  display: inline-block;
  padding: 0.35em 0.65em;
  font-size: 0.75em;
  font-weight: 600;
  border-radius: 0.375rem;
}

.text-bg-success { background: var(--bs-success); color: #fff; }
.text-bg-secondary { background: var(--bs-secondary); color: #fff; }
.text-bg-warning { background: var(--bs-warning); color: #000; }

.img-fluid { max-width: 100%; height: auto; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.875em;
  background: #f1f3f5;
  padding: 0.1em 0.35em;
  border-radius: 0.25rem;
}

/* Login card */
.shadow-sm { box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075); }
.w-100 { width: 100%; }

@media (min-width: 768px) {
  .col-md-5 { flex: 0 0 41.666%; max-width: 41.666%; }
  .col-md-8 { flex: 0 0 66.666%; max-width: 66.666%; }
  .col-lg-4 { flex: 0 0 33.333%; max-width: 33.333%; }
  .col-lg-5 { flex: 0 0 41.666%; max-width: 41.666%; }
  .col-lg-6 { flex: 0 0 50%; max-width: 50%; }
  .col-lg-7 { flex: 0 0 58.333%; max-width: 58.333%; }
  .col-sm-10 { flex: 0 0 83.333%; max-width: 83.333%; }
}

/* Infrastructure monitoring */
.mon-panel {
  border: 0;
  box-shadow: 0 0.25rem 1rem rgba(15, 23, 42, 0.06);
}

.mon-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-weight: 600;
  background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
}

.mon-meta-value {
  font-weight: 600;
}

.mon-gauge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}

.mon-gauge {
  text-align: center;
  min-width: 7rem;
}

.mon-gauge-ring {
  position: relative;
  width: 6.5rem;
  height: 6.5rem;
  margin: 0 auto;
}

.mon-gauge-svg,
.mon-gauge-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.mon-gauge-track {
  stroke: #e9ecef;
}

.mon-gauge-bar {
  transition: stroke-dasharray 0.4s ease;
}

.mon-gauge--ok .mon-gauge-bar { stroke: #198754; }
.mon-gauge--warning .mon-gauge-bar { stroke: #fd7e14; }
.mon-gauge--danger .mon-gauge-bar { stroke: #dc3545; }

.mon-gauge-center {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  font-weight: 700;
  color: #212529;
}

.mon-gauge-label {
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: #6c757d;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.mon-traffic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 1rem;
}

.mon-traffic-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  border-radius: 0.75rem;
  border: 1px solid transparent;
}

.mon-traffic-card--rx {
  background: linear-gradient(135deg, rgba(25, 135, 84, 0.08), rgba(25, 135, 84, 0.02));
  border-color: rgba(25, 135, 84, 0.18);
}

.mon-traffic-card--tx {
  background: linear-gradient(135deg, rgba(13, 110, 253, 0.08), rgba(13, 110, 253, 0.02));
  border-color: rgba(13, 110, 253, 0.18);
}

.mon-traffic-card--total {
  background: linear-gradient(135deg, rgba(111, 66, 193, 0.08), rgba(111, 66, 193, 0.02));
  border-color: rgba(111, 66, 193, 0.18);
}

.mon-traffic-icon {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  opacity: 0.85;
}

.mon-traffic-value {
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.1;
  color: #212529;
}

.mon-traffic-unit {
  font-size: 0.85rem;
  font-weight: 600;
  color: #6c757d;
}

.mon-traffic-label {
  font-size: 0.78rem;
  color: #6c757d;
  margin-top: 0.15rem;
}

.mon-chart-wrap {
  background: #fafbfc;
  border: 1px solid #e9ecef;
  border-radius: 0.75rem;
  padding: 0.85rem 0.85rem 0.75rem;
}

.mon-chart-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: #495057;
  margin-bottom: 0.5rem;
}

.mon-chart-canvas {
  position: relative;
  width: 100%;
  height: 200px;
}

.mon-chart-canvas canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.mon-chart-empty[hidden] {
  display: none !important;
}

.mon-chart-empty:not([hidden]) {
  min-height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}