/* ===== LiftSense Dashboard — Design System ===== */
:root {
  --bg-body: #0b1120;
  --bg-sidebar: #0d1526;
  --bg-card: rgba(17, 25, 45, 0.85);
  --bg-card-hover: rgba(22, 33, 58, 0.95);
  --bg-input: rgba(15, 22, 40, 0.9);
  --border: rgba(56, 97, 168, 0.2);
  --border-active: rgba(59, 130, 246, 0.5);
  --text-primary: #e8edf5;
  --text-secondary: #8b9dc3;
  --text-muted: #5a6d8a;
  --accent: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.3);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.12);
  --safe: #10b981;
  --safe-bg: rgba(16, 185, 129, 0.12);
  --gradient-brand: linear-gradient(135deg, #3b82f6, #6366f1, #8b5cf6);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.25);
  --transition: 0.25s cubic-bezier(.4,0,.2,1);
  --sidebar-w: 260px;
  --topbar-h: 64px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; }
body { font-family: var(--font); background: var(--bg-body); color: var(--text-primary); min-height: 100vh; display: flex; overflow-x: hidden; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ===== SIDEBAR ===== */
.sidebar { width: var(--sidebar-w); height: 100vh; position: fixed; left: 0; top: 0; background: var(--bg-sidebar); border-right: 1px solid var(--border); display: flex; flex-direction: column; z-index: 110; transition: transform var(--transition); }

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 22, 0.55);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
  z-index: 105;
}

.sidebar-overlay.visible {
  opacity: 1;
  visibility: visible;
}
.sidebar-brand { display: flex; align-items: center; justify-content: center; padding: 16px 12px; border-bottom: 1px solid var(--border); }
.brand-logo { width: 100%; max-width: 180px; height: auto; object-fit: contain; }

.sidebar-nav { flex: 1; padding: 12px 10px; display: flex; flex-direction: column; gap: 4px; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: var(--radius-sm); color: var(--text-secondary); text-decoration: none; font-size: 0.9rem; font-weight: 500; transition: all var(--transition); }
.nav-item:hover { background: rgba(59, 130, 246, 0.08); color: var(--text-primary); }
.nav-item.active { background: rgba(59, 130, 246, 0.15); color: var(--accent); box-shadow: inset 3px 0 0 var(--accent); }
.nav-icon { font-size: 1.15rem; }

.sidebar-status { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--text-muted); }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted); flex-shrink: 0; transition: background var(--transition); }
.status-dot.online { background: var(--safe); box-shadow: 0 0 8px var(--safe); animation: pulse-dot 2s infinite; }
.status-dot.offline { background: var(--danger); box-shadow: 0 0 8px var(--danger); }
@keyframes pulse-dot { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

.sidebar-tenant { padding: 10px 20px; border-top: 1px solid var(--border); }
.sidebar-tenant-summary { display: flex; align-items: center; gap: 8px; font-size: 0.78rem; color: var(--text-muted); }
.tenant-name { color: var(--text-secondary); font-weight: 600; }
.sidebar-tenant-user { font-size: 0.72rem; color: var(--text-muted); margin-top: 4px; padding-left: 24px; }

.sidebar-footer { padding: 12px 20px 20px; border-top: 1px solid var(--border); }
.model-info { display: flex; flex-direction: column; gap: 6px; }
.info-row { display: flex; justify-content: space-between; font-size: 0.78rem; }
.info-label { color: var(--text-muted); }
.info-value { color: var(--text-secondary); font-weight: 600; font-variant-numeric: tabular-nums; }

/* ===== MAIN CONTENT ===== */
.main-content { margin-left: var(--sidebar-w); flex: 1; min-height: 100vh; display: flex; flex-direction: column; }

.topbar { height: var(--topbar-h); padding: 0 28px; display: flex; align-items: center; gap: 16px; border-bottom: 1px solid var(--border); background: rgba(11, 17, 32, 0.9); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); position: sticky; top: 0; z-index: 50; }
.topbar-title h1 { font-size: 1.15rem; font-weight: 700; }
.topbar-subtitle { font-size: 0.78rem; color: var(--text-muted); }
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.live-clock { font-size: 0.85rem; color: var(--text-secondary); font-variant-numeric: tabular-nums; font-weight: 500; }
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }
.menu-toggle span { display: block; width: 20px; height: 2px; background: var(--text-secondary); margin: 4px 0; border-radius: 2px; transition: var(--transition); }

/* ===== TAB CONTENT ===== */
.tab-content { display: none; padding: 24px 28px 40px; flex: 1; animation: fadeIn 0.3s ease; }
.tab-content.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ===== EMPTY STATE ===== */
.empty-state { text-align: center; padding: 80px 20px; }
.empty-icon { font-size: 4rem; margin-bottom: 16px; animation: float 3s ease-in-out infinite; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
.empty-state h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.empty-state p { color: var(--text-secondary); max-width: 420px; margin: 0 auto 24px; line-height: 1.6; }

/* ===== BUTTONS ===== */
.btn-primary { display: inline-flex; align-items: center; gap: 8px; padding: 10px 24px; background: var(--gradient-brand); color: #fff; border: none; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: all var(--transition); font-family: var(--font); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px var(--accent-glow); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-secondary { display: inline-flex; align-items: center; gap: 8px; padding: 8px 18px; background: transparent; color: var(--accent); border: 1px solid var(--border-active); border-radius: var(--radius-sm); font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: all var(--transition); font-family: var(--font); }
.btn-secondary:hover { background: rgba(59,130,246,0.1); }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }

/* ===== KPI CARDS ===== */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.kpi-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; display: flex; align-items: center; gap: 14px; transition: all var(--transition); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.kpi-card:hover { border-color: var(--border-active); transform: translateY(-2px); box-shadow: var(--shadow-card); }
.kpi-icon { font-size: 1.8rem; }
.kpi-value { font-size: 1.6rem; font-weight: 800; display: block; font-variant-numeric: tabular-nums; }
.kpi-label { font-size: 0.78rem; color: var(--text-muted); font-weight: 500; }
.kpi-pct { font-size: 0.72rem; color: var(--text-secondary); font-weight: 600; }
.kpi-danger-card { border-left: 3px solid var(--danger); }
.kpi-warning-card { border-left: 3px solid var(--warning); }
.kpi-safe-card { border-left: 3px solid var(--safe); }

/* ===== CHART CARDS ===== */
.chart-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.chart-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); transition: border-color var(--transition); }
.chart-card:hover { border-color: var(--border-active); }
.chart-title { font-size: 0.9rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }

/* Gauge */
.gauge-container { text-align: center; padding: 10px 0; }
.gauge-value { font-size: 2.4rem; font-weight: 900; margin-top: -10px; background: var(--gradient-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.gauge-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

/* ===== ALERTS ===== */
.alerts-section { margin-top: 24px; }
.alerts-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.alerts-header h3 { font-size: 1.05rem; font-weight: 700; }
.alert-badge { background: var(--danger); color: #fff; padding: 2px 10px; border-radius: 20px; font-size: 0.8rem; font-weight: 700; animation: pulse-dot 2s infinite; }
.alerts-list { display: flex; flex-direction: column; gap: 10px; }
.alert-item { background: var(--danger-bg); border: 1px solid rgba(239,68,68,0.25); border-radius: var(--radius-sm); padding: 14px 18px; cursor: pointer; transition: all var(--transition); }
.alert-item:hover { border-color: var(--danger); }
.alert-item-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.alert-operator { font-weight: 700; color: var(--danger); }
.alert-time { font-size: 0.78rem; color: var(--text-muted); }
.alert-details { display: none; margin-top: 10px; padding-top: 10px; border-top: 1px solid rgba(239,68,68,0.15); }
.alert-details.open { display: block; }
.alert-metric { display: inline-flex; flex-direction: column; margin-right: 24px; margin-bottom: 8px; }
.alert-metric-label { font-size: 0.72rem; color: var(--text-muted); }
.alert-metric-value { font-size: 0.95rem; font-weight: 700; }
.alert-rec { font-size: 0.82rem; color: var(--text-secondary); margin: 2px 0; }

/* ===== UPLOAD ===== */
.upload-section { max-width: 700px; margin: 0 auto; }
.upload-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.upload-header { margin-bottom: 24px; }
.upload-header h2 { font-size: 1.3rem; font-weight: 700; margin-bottom: 6px; }
.upload-header p { color: var(--text-secondary); font-size: 0.9rem; }
.upload-instructions { margin-bottom: 24px; }
.upload-instructions h4 { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 10px; font-weight: 600; }
.columns-grid { display: flex; flex-wrap: wrap; gap: 6px; }
.col-tag { background: rgba(59,130,246,0.12); color: var(--accent); padding: 4px 10px; border-radius: 4px; font-size: 0.78rem; font-weight: 600; font-family: monospace; }
.col-tag.optional { background: rgba(139,157,195,0.1); color: var(--text-muted); }
.drop-zone { border: 2px dashed var(--border); border-radius: var(--radius); padding: 40px 20px; text-align: center; cursor: pointer; transition: all var(--transition); }
.drop-zone:hover, .drop-zone.drag-over { border-color: var(--accent); background: rgba(59,130,246,0.05); }
.drop-icon { font-size: 2.5rem; margin-bottom: 10px; }
.drop-zone p { color: var(--text-secondary); margin-bottom: 6px; }
.drop-zone span { color: var(--text-muted); font-size: 0.8rem; display: block; margin-bottom: 10px; }
.file-info { display: flex; align-items: center; gap: 14px; margin-top: 16px; padding: 14px 18px; background: var(--safe-bg); border: 1px solid rgba(16,185,129,0.25); border-radius: var(--radius-sm); }
.file-name { font-weight: 700; color: var(--safe); }
.file-size { color: var(--text-muted); font-size: 0.82rem; flex: 1; }
.progress-section { margin-top: 20px; }
.progress-bar { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; width: 0; background: var(--gradient-brand); border-radius: 3px; transition: width 0.5s ease; }
.progress-text { display: block; text-align: center; margin-top: 8px; font-size: 0.82rem; color: var(--text-secondary); }
.preview-section { margin-top: 20px; }
.preview-section h4 { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 10px; }

/* ===== ANALYSIS OPTIONS ===== */
.analysis-options {
    margin-top: 20px;
    padding: 20px;
    background: rgba(59,130,246,0.04);
    border: 1px solid rgba(59,130,246,0.15);
    border-radius: var(--radius);
}
.analysis-options h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}
.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}
.option-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.option-group > label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
}
.option-group select,
.option-group input[type="number"],
.option-group input[type="datetime-local"] {
    padding: 8px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: inherit;
    transition: border-color var(--transition);
}
.option-group select:focus,
.option-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(59,130,246,0.15);
}
.option-hint {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-style: italic;
}
.time-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 8px;
}
.time-input-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.time-input-group label {
    font-size: 0.75rem;
    color: var(--text-muted);
}
.analysis-summary {
    margin-top: 16px;
    padding: 12px 16px;
    background: rgba(16,185,129,0.08);
    border: 1px solid rgba(16,185,129,0.2);
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    color: var(--text-secondary);
    display: none;
}
.analysis-summary.visible {
    display: block;
}
.analysis-summary strong {
    color: var(--safe);
}

/* ===== TABLES ===== */
.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
th { text-align: left; padding: 10px 12px; color: var(--text-muted); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--bg-card); }
td { padding: 8px 12px; border-bottom: 1px solid rgba(56,97,168,0.1); color: var(--text-secondary); font-variant-numeric: tabular-nums; }
tr:hover td { background: rgba(59,130,246,0.04); }
.badge { padding: 3px 8px; border-radius: 4px; font-size: 0.72rem; font-weight: 700; text-transform: uppercase; }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-safe { background: var(--safe-bg); color: var(--safe); }

/* ===== HISTORY ===== */
.history-empty { text-align: center; padding: 80px 20px; }
.filter-bar { display: flex; gap: 16px; align-items: flex-end; margin-bottom: 20px; flex-wrap: wrap; }
.filter-group { display: flex; flex-direction: column; gap: 4px; }
.filter-group label { font-size: 0.75rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.filter-group select { background: var(--bg-input); color: var(--text-primary); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 8px 12px; font-size: 0.85rem; font-family: var(--font); min-width: 160px; cursor: pointer; }
.filter-group select:focus { outline: none; border-color: var(--accent); }
.filter-info { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 16px; }

/* ===== REALTIME ===== */
.realtime-header { margin-bottom: 24px; }
.realtime-header h2 { font-size: 1.3rem; font-weight: 700; margin-bottom: 6px; }
.realtime-header p { color: var(--text-secondary); font-size: 0.9rem; }
.realtime-controls { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.realtime-label { font-weight: 600; }
.realtime-group-select { min-width: 220px; }
.sim-status { font-size: 0.85rem; color: var(--text-muted); margin-left: 8px; }
.realtime-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.realtime-feed-card { max-height: 360px; }
.feed-list { display: flex; flex-direction: column; gap: 8px; max-height: 280px; overflow-y: auto; }
.feed-item { padding: 10px 14px; border-radius: var(--radius-sm); font-size: 0.82rem; display: flex; justify-content: space-between; align-items: center; animation: slideIn 0.3s ease; }
.feed-item.danger { background: var(--danger-bg); border-left: 3px solid var(--danger); }
.feed-item.warning { background: var(--warning-bg); border-left: 3px solid var(--warning); }
.feed-item.safe { background: var(--safe-bg); border-left: 3px solid var(--safe); }
@keyframes slideIn { from { opacity: 0; transform: translateX(-10px); } to { opacity: 1; transform: none; } }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .chart-grid-2, .realtime-grid { grid-template-columns: 1fr; }
}
/* ===== FOOTER ===== */
.app-footer { margin-top: auto; padding: 20px 24px; border-top: 1px solid var(--border); text-align: center; }
.footer-content { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; }
.footer-content a { color: var(--accent); text-decoration: none; }
.footer-content a:hover { text-decoration: underline; }
.footer-brand { font-size: 0.7rem; opacity: 0.7; }

@media (max-width: 768px) {
  .admin-grid { grid-template-columns: 1fr; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay { display: block; }
  .main-content { margin-left: 0; }
  .menu-toggle { display: block; }
  .tab-content { padding: 16px; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .kpi-grid { grid-template-columns: 1fr; }
}

/* ===== LOGOUT BUTTON ===== */
.btn-logout {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  width: 100%;
  margin-top: 12px;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-sm);
  color: var(--danger);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}
.btn-logout:hover { background: rgba(239, 68, 68, 0.15); }

/* ===== ADMIN PANEL ===== */
.admin-section { max-width: 800px; }
.admin-section h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 8px; }
.admin-description { color: var(--text-secondary); margin-bottom: 24px; }

.admin-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.admin-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.admin-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.admin-card p { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 16px; }
.invite-refresh-button { margin-top: 12px; }
.invite-code-hint { margin-top: 8px; display: block; }

.invite-code-display {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
}

.invite-code-display code {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  flex: 1;
}

.admin-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.admin-table th { text-align: left; color: var(--text-muted); padding: 10px 12px; border-bottom: 1px solid var(--border); font-weight: 600; }
.admin-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); }

.role-badge {
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}
.role-badge.role-admin { background: rgba(59,130,246,0.15); color: var(--accent); }
.role-badge.role-operator { background: rgba(16,185,129,0.12); color: var(--safe); }

/* ===== DEVICES TAB ===== */
.devices-section { padding: 24px; }
.devices-header { margin-bottom: 24px; }
.devices-header h2 { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.devices-header p { color: var(--text-secondary); margin-bottom: 16px; }

.device-list { display: grid; gap: 16px; }

.device-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}
.device-card:hover { background: var(--bg-card-hover); border-color: var(--border-active); }

.device-icon {
  width: 48px; height: 48px;
  background: var(--accent-glow);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
}

.device-info { flex: 1; }
.device-info h4 { font-size: 1rem; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; }
.device-info .device-serial { font-size: 0.8rem; color: var(--text-muted); font-family: monospace; }
.device-info .device-meta { display: flex; gap: 12px; margin-top: 6px; font-size: 0.78rem; color: var(--text-secondary); }

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

.status-badge {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.status-badge.online { background: var(--safe-bg); color: var(--safe); }
.status-badge.offline { background: rgba(100,116,139,0.15); color: #94a3b8; }
.status-badge.linked { background: rgba(59,130,246,0.15); color: var(--accent); }

/* ===== QR SCANNER MODAL ===== */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
}
.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 90%; max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-content-sm { max-width: 420px; }
.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; font-weight: 600; color: var(--text-primary); }
.modal-close {
  background: none; border: none; color: var(--text-muted);
  font-size: 1.5rem; cursor: pointer; padding: 4px 8px;
  border-radius: 6px; transition: var(--transition);
}
.modal-close:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.modal-body { padding: 24px; }

.qr-scanner-container {
  position: relative;
  width: 100%; aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #000;
  margin-bottom: 12px;
}
.qr-scanner-container video { width: 100%; height: 100%; object-fit: cover; }
.qr-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
.qr-frame {
  width: 200px; height: 200px;
  border: 2px solid var(--accent);
  border-radius: 12px;
  box-shadow: 0 0 0 4000px rgba(0,0,0,0.3);
}
.qr-hint { text-align: center; color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 16px; }

.qr-divider {
  display: flex; align-items: center; gap: 12px;
  margin: 16px 0; color: var(--text-muted); font-size: 0.8rem;
}
.qr-divider::before, .qr-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

#qr-manual-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: monospace;
  font-size: 0.8rem;
  padding: 12px;
  resize: vertical;
  margin-bottom: 12px;
}
#qr-manual-input:focus { outline: none; border-color: var(--accent); }

/* Device Preview Card */
.device-preview-card {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 20px;
}
.device-preview-card h4 { font-size: 1.1rem; font-weight: 600; color: var(--text-primary); margin-bottom: 12px; }
.preview-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); }
.preview-row:last-child { border-bottom: none; }
.preview-label { color: var(--text-muted); font-size: 0.85rem; }
.preview-value { color: var(--text-primary); font-size: 0.85rem; font-weight: 500; }

.modal-actions { display: flex; gap: 12px; justify-content: flex-end; }

.device-group-form { margin-top: 16px; }
.device-group-label { display: block; font-weight: 600; margin-bottom: 8px; }
.device-group-input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2, var(--bg-input));
  color: var(--text-primary);
}
.form-help { display: block; margin-top: 6px; color: var(--text-muted); }

/* ===== TELEMETRY PANEL ===== */
.telemetry-panel { padding: 24px; }
.telemetry-header { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.telemetry-header h3 { flex: 1; font-size: 1.2rem; font-weight: 600; color: var(--text-primary); }

.telemetry-grid { display: grid; gap: 20px; }
.telemetry-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.telemetry-card h4 { font-size: 0.9rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 12px; }
#telemetry-map { height: 300px; border-radius: 8px; }

.telemetry-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}
.stat-value { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); }
.stat-label { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; }

/* ===== RETRAIN TAB ===== */
.retrain-section { max-width: 1000px; }
.retrain-header { margin-bottom: 24px; }
.retrain-header h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 6px; }
.retrain-header p { color: var(--text-secondary); font-size: 0.9rem; }

.retrain-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.retrain-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.retrain-history-card { margin-top: 24px; }
.retrain-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.retrain-card > p { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 16px; }

.retrain-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}
.retrain-form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.retrain-form-group select,
.retrain-form-group input[type="number"] {
  padding: 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: inherit;
  transition: border-color var(--transition);
}
.retrain-form-group select:focus,
.retrain-form-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(59,130,246,0.15);
}
.retrain-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-style: italic;
}

.retrain-thresholds-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 16px;
}

.retrain-threshold-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

/* Active job banner */
.retrain-active-job {
  background: rgba(59,130,246,0.08);
  border: 1px solid rgba(59,130,246,0.25);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 24px;
}
.retrain-job-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-weight: 600;
  color: var(--accent);
}
.retrain-spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.retrain-progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
.retrain-progress-fill {
  height: 100%;
  width: 0;
  background: var(--gradient-brand);
  border-radius: 3px;
  transition: width 0.5s ease;
}
.retrain-progress-pct {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
}

/* Runs table */
.retrain-runs-table-wrap { overflow-x: auto; }
.retrain-runs-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.retrain-runs-table th {
  text-align: left;
  padding: 10px 12px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}
.retrain-runs-table td {
  padding: 8px 12px;
  border-bottom: 1px solid rgba(56,97,168,0.1);
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}
.retrain-runs-table tr:hover td { background: rgba(59,130,246,0.04); }
.retrain-runs-table code { font-size: 0.78rem; color: var(--accent); }

@media (max-width: 768px) {
  .retrain-grid { grid-template-columns: 1fr; }
  .retrain-thresholds-grid { grid-template-columns: 1fr; }
}

/* Retrain Import Section */
.retrain-import-section {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.retrain-import-section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}
.retrain-import-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.retrain-upload-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.retrain-upload-name {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-style: italic;
}
.retrain-upload-status {
  margin-top: 8px;
  font-size: 0.8rem;
  min-height: 1.2em;
}
.retrain-upload-status.status-ok { color: var(--safe); }
.retrain-upload-status.status-error { color: var(--danger); }
.retrain-upload-status.status-loading { color: var(--accent); }
.retrain-empty-dataset {
  margin-top: 8px;
  padding: 10px 14px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-sm);
}
.retrain-empty-dataset p {
  color: var(--warning);
  font-size: 0.82rem;
  margin: 0;
}
.retrain-threshold-card {
  margin-top: 24px;
}

/* ===== UTILITIES ===== */
.text-muted { color: var(--text-muted); }
.initially-hidden { display: none; }