/* ─── Reset & Base ─────────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --sidebar-width: 260px;
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-card-hover: #22263a;
  --bg-sidebar: #13151d;
  --border: #2a2d3a;
  --text: #e4e6f0;
  --text-muted: #8b8fa3;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --green: #22c55e;
  --green-bg: rgba(34, 197, 94, 0.12);
  --red: #ef4444;
  --red-bg: rgba(239, 68, 68, 0.12);
  --yellow: #f59e0b;
  --yellow-bg: rgba(245, 158, 11, 0.12);
  --blue: #3b82f6;
  --blue-bg: rgba(59, 130, 246, 0.12);
  --radius: 10px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}

/* Light Mode */
body.light-mode {
  --bg: #f5f7fa;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f2f5;
  --bg-sidebar: #ffffff;
  --border: #e1e4eb;
  --text: #1a1d27;
  --text-muted: #6b7280;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --green: #16a34a;
  --green-bg: rgba(22, 163, 74, 0.1);
  --red: #dc2626;
  --red-bg: rgba(220, 38, 38, 0.1);
  --yellow: #d97706;
  --yellow-bg: rgba(217, 119, 6, 0.1);
  --blue: #2563eb;
  --blue-bg: rgba(37, 99, 235, 0.1);
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ─── Sidebar ──────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  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 ease, background 0.3s ease, border-color 0.3s ease;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-light);
}

.logo i {
  font-size: 24px;
}

.client-selector-wrapper {
  margin-top: 16px;
}

.client-selector-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.client-selector {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
}

.client-selector:hover {
  border-color: var(--accent);
}

.client-selector:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  margin-bottom: 2px;
}

.nav-item:hover {
  background: var(--bg-card-hover);
  color: var(--text);
}

.nav-item.active {
  background: var(--accent);
  color: #fff;
}

.nav-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 16px 14px 6px;
}

.device-list {
  max-height: calc(100vh - 220px);
  overflow-y: auto;
}

.device-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--text-muted);
}

.device-item:hover {
  background: var(--bg-card-hover);
  color: var(--text);
}

.device-item.active {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-light);
}

.device-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.device-dot.online {
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
}

.device-dot.warning {
  background: var(--yellow);
  box-shadow: 0 0 6px var(--yellow);
}

.device-dot.offline {
  background: var(--red);
  box-shadow: 0 0 6px var(--red);
}

.device-item-name {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.device-item-mac {
  font-size: 10px;
  color: var(--text-muted);
  font-family: monospace;
}

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

.connection-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.connection-status.connected {
  color: var(--green);
}

.connection-status.error {
  color: var(--red);
}

.theme-toggle-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
  margin-bottom: 8px;
}

.theme-toggle-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  color: var(--accent-light);
}

.logout-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
}

.logout-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--red);
  color: var(--red);
}

/* ─── Sidebar Toggle (mobile) ─────────────────────── */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 200;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 8px;
  font-size: 20px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* ─── Main Content ─────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: 28px 32px;
  min-height: 100vh;
}

.page {
  animation: fadeIn 0.25s ease;
}

.page.hidden {
  display: none;
}

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

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 4px;
}

.subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.page-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* ─── Buttons ──────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-outline:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 4px 8px;
  margin-bottom: 8px;
}

.btn-ghost:hover {
  color: var(--text);
}

.select-input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
}

.select-input:focus {
  outline: none;
  border-color: var(--accent);
}

.custom-range-inputs {
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideIn 0.2s ease;
}

.custom-range-inputs.hidden {
  display: none;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: translateX(0); }
}

.date-input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  min-width: 200px;
}

.date-input:focus {
  outline: none;
  border-color: var(--accent);
}

.date-input::-webkit-calendar-picker-indicator {
  filter: invert(1);
  cursor: pointer;
}

.date-separator {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
}

.date-range-input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
  min-width: 300px;
  cursor: pointer;
}

.date-range-input:focus {
  outline: none;
  border-color: var(--accent);
}

.date-range-input::placeholder {
  color: var(--text-muted);
}

/* Litepicker Dark Theme Override */
.litepicker {
  font-family: inherit;
  color: var(--text);
}

.litepicker .container__main {
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
}

.litepicker .container__months {
  background: var(--bg-card);
}

.litepicker .month-item-header div {
  color: var(--text) !important;
  font-weight: 600;
  font-size: 14px;
}

.litepicker .month-item-weekdays-row > div {
  color: var(--text-muted) !important;
  font-weight: 600;
  font-size: 11px;
}

.litepicker .day-item {
  color: var(--text) !important;
  transition: all 0.2s ease;
  font-size: 13px;
}

.litepicker .day-item:hover {
  background: var(--bg-card-hover) !important;
  border-radius: 6px;
  color: var(--text) !important;
}

.litepicker .day-item.is-locked {
  color: var(--text-muted) !important;
  opacity: 0.4;
}

.litepicker .day-item.is-in-range {
  background: rgba(99, 102, 241, 0.2) !important;
  color: var(--text) !important;
}

.litepicker .day-item.is-start-date,
.litepicker .day-item.is-end-date {
  background: var(--accent) !important;
  color: white !important;
  border-radius: 6px;
  font-weight: 600;
}

.litepicker .day-item.is-start-date.is-end-date {
  border-radius: 6px;
}

.litepicker .day-item.is-today {
  border: 2px solid var(--accent) !important;
  color: var(--text) !important;
}

.litepicker .button-previous-month svg,
.litepicker .button-next-month svg {
  fill: var(--text) !important;
}

.litepicker .button-previous-month:hover svg,
.litepicker .button-next-month:hover svg {
  fill: var(--accent) !important;
}

.litepicker .button-apply,
.litepicker .button-cancel {
  background: var(--accent);
  color: white !important;
  border-radius: 6px;
  padding: 8px 16px;
  transition: all 0.2s ease;
  border: none;
}

.litepicker .button-apply:hover {
  background: var(--accent-light);
}

.litepicker .button-cancel {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text) !important;
}

.litepicker .button-cancel:hover {
  background: var(--bg-card-hover);
}

/* ─── Stats Cards ──────────────────────────────────── */
.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: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.stat-icon.total {
  background: var(--blue-bg);
  color: var(--blue);
}

.stat-icon.online {
  background: var(--green-bg);
  color: var(--green);
}

.stat-icon.offline {
  background: var(--red-bg);
  color: var(--red);
}

.stat-icon.events {
  background: var(--yellow-bg);
  color: var(--yellow);
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ─── New Dashboard Styles ────────────────────────── */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  margin-top: 32px;
}

.section-header:first-of-type {
  margin-top: 0;
}

.section-header h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

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

.last-refreshed strong {
  color: var(--text);
  font-weight: 600;
}

/* Primary Stats Grid */
.primary-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.primary-stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.primary-stat-card.highlight-green {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.08) 0%, var(--bg-card) 100%);
  border-color: rgba(34, 197, 94, 0.2);
}

.primary-stat-card.highlight-yellow {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.08) 0%, var(--bg-card) 100%);
  border-color: rgba(245, 158, 11, 0.2);
}

.primary-stat-card.highlight-red {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.08) 0%, var(--bg-card) 100%);
  border-color: rgba(239, 68, 68, 0.2);
}

.primary-stat-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.primary-stat-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.primary-stat-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.primary-stat-value {
  font-size: 36px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  margin: 12px 0;
}

.primary-stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.primary-stat-icon.gray {
  background: rgba(139, 143, 163, 0.12);
  color: var(--text-muted);
}

.primary-stat-icon-small {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.primary-stat-icon-small.green {
  background: var(--green-bg);
  color: var(--green);
}

.primary-stat-icon-small.yellow {
  background: var(--yellow-bg);
  color: var(--yellow);
}

.primary-stat-icon-small.red {
  background: var(--red-bg);
  color: var(--red);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: hidden;
  margin: 12px 0 8px;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease;
}

.progress-fill.green {
  background: var(--green);
}

.progress-fill.yellow {
  background: var(--yellow);
}

.progress-fill.red {
  background: var(--red);
}

.primary-stat-percentage {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
}

/* Secondary Stats Grid */
.secondary-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.secondary-stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.health-score-container {
  display: flex;
  gap: 16px;
  align-items: center;
}

.health-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--yellow-bg);
  color: var(--yellow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.health-content {
  flex: 1;
}

.health-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.health-value {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 2px;
}

.health-value span:first-child {
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}

.health-rating {
  font-size: 13px;
  font-weight: 600;
  color: var(--yellow);
  padding: 2px 8px;
  background: var(--yellow-bg);
  border-radius: 4px;
}

.health-note {
  font-size: 11px;
  color: var(--text-muted);
}

.secondary-stat-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.secondary-stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  margin-bottom: 4px;
}

.secondary-stat-value.critical {
  color: var(--red);
}

.secondary-stat-note {
  font-size: 11px;
  color: var(--text-muted);
}

/* Nodes Lists Grid */
.nodes-lists-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.nodes-list-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.nodes-list-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.nodes-list-header i {
  font-size: 18px;
  color: var(--text-muted);
}

.nodes-list-header h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.nodes-list {
  padding: 8px;
  max-height: 300px;
  overflow-y: auto;
}

.node-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-radius: 6px;
  transition: background 0.1s;
  cursor: pointer;
}

.node-list-item:hover {
  background: var(--bg-card-hover);
}

.node-list-item-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.node-list-item-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

.node-list-item-time {
  font-size: 11px;
  color: var(--text-muted);
  font-family: monospace;
}

.node-list-item-duration {
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.node-list-item-duration.offline {
  color: var(--red);
}

.node-list-item-duration.online {
  color: var(--green);
}

/* Table Controls */
.table-controls {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.search-input {
  flex: 1;
  min-width: 250px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px 8px 36px;
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%238b8fa3'%3E%3Cpath d='M18.031 16.617l4.283 4.282-1.415 1.415-4.282-4.283A8.96 8.96 0 0 1 11 20c-4.968 0-9-4.032-9-9s4.032-9 9-9 9 4.032 9 9a8.96 8.96 0 0 1-1.969 5.617zm-2.006-.742A6.977 6.977 0 0 0 18 11c0-3.868-3.133-7-7-7-3.868 0-7 3.132-7 7 0 3.867 3.132 7 7 7a6.977 6.977 0 0 0 4.875-1.975l.15-.15z'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 10px center;
  background-size: 18px;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.table-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.table-count {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ─── Charts ───────────────────────────────────────── */
.charts-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.chart-card.wide {
  grid-column: 1 / -1;
}

.chart-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chart-header h3 {
  font-size: 14px;
  font-weight: 600;
}

.chart-actions {
  display: flex;
  gap: 6px;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 16px;
}

.btn-icon:hover {
  background: var(--bg-card-hover);
  color: var(--text);
  border-color: var(--accent);
}

.chart-footer {
  padding: 10px 20px;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.chart-hint {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-muted);
  font-style: italic;
}

.chart-hint i {
  font-size: 14px;
}

.chart-body {
  padding: 16px;
  height: 280px;
  position: relative;
}

.chart-body.tall {
  height: 360px;
}

/* ─── Tables ───────────────────────────────────────── */
.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}

.table-wrapper {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table thead {
  background: rgba(255, 255, 255, 0.03);
}

.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.data-table th[data-col] {
  cursor: pointer;
  user-select: none;
}

.data-table th[data-col]:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.data-table th.sort-active {
  color: var(--accent, #6366f1);
}

.sort-icon {
  opacity: 0.45;
  font-size: 10px;
  margin-left: 2px;
}

.data-table th.sort-active .sort-icon {
  opacity: 1;
}

.data-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.data-table tbody tr {
  transition: background 0.1s;
}

.data-table tbody tr:hover {
  background: var(--bg-card-hover);
}

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

.loading-cell {
  text-align: center;
  color: var(--text-muted);
  padding: 40px !important;
}

/* Status badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}

.badge.online {
  background: var(--green-bg);
  color: var(--green);
}

.badge.warning {
  background: var(--yellow-bg);
  color: var(--yellow);
}

.badge.offline {
  background: var(--red-bg);
  color: var(--red);
}

.badge.event-online {
  background: var(--green-bg);
  color: var(--green);
}

.badge.event-refresh {
  background: var(--blue-bg);
  color: var(--blue);
}

.badge.event-deepsleep {
  background: var(--yellow-bg);
  color: var(--yellow);
}

/* Battery bar */
.battery-bar-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

.battery-bar {
  width: 60px;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: hidden;
}

.battery-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s ease;
}

/* ─── Loading / Spinner ────────────────────────────── */
.loading-spinner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 14px;
  color: var(--text-muted);
  font-size: 13px;
}

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

.spin {
  animation: spin 1s linear infinite;
  display: inline-block;
}

/* ─── Scrollbar ────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ─── Responsive ───────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-toggle {
    display: flex;
  }

  .main-content {
    margin-left: 0;
    padding: 20px 16px;
    padding-top: 64px;
  }

  .charts-row {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .primary-stats-grid {
    grid-template-columns: 1fr;
  }

  .secondary-stats-grid {
    grid-template-columns: 1fr;
  }

  .nodes-lists-grid {
    grid-template-columns: 1fr;
  }

  .table-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .search-input {
    min-width: 100%;
  }

  .table-info {
    justify-content: space-between;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}