:root {
    --bg:       #090c10;
    --surface:  #12161d;
    --border:   #282d36;
    --accent:   #3bb588;
    --accent2:  #0080ff;
    --icon-soft: #e6edf3;
    --th-bg:       #1c222b;
    --hover-row:   #1c2128;
    --badge-green-bg: #1a3a2a; --badge-green-fg: #3bb588;
    --badge-blue-bg:  #14243a; --badge-blue-fg:  #7aa2cc;
    --badge-gray-bg:  #21262d;
    --badge-yellow-bg:#241c0a; --badge-yellow-fg:#ca9a4e;
    --badge-red-bg:   #241313; --badge-red-fg:   #d97570;
    --text:     #cdd5df;
    --muted:    #8b949e;
    --danger:   #f85149;
    --warn:     #d29922;
    --header-bg: #12161d;
    --ipn-dash:  #00d4ff;
    --bar-track: #1c2128;
    --login-left-bg:  #1a4a63;
    --login-right-bg: #12161d;
    --input-autofill: #12161d;
    --mono:     'Inter', sans-serif;
    --sans:     'Inter', sans-serif;
    --radius:   6px;
  }
  /* System light override */
  @media (prefers-color-scheme: light) {
    [data-theme="system"] {
      --bg:       #e8eef6;
      --surface:  #f8fafc;
      --header-bg: #f8fafc;
      --ipn-dash:  #1a4d8f;
      --bar-track: #e2e8f0;
      --border:   #cdd5e2;
      --accent:   #00875a;
      --accent2:  #00875a;
      --text:     #1f2328;
      --muted:    #3a4452;
      --danger:   #cf222e;
      --warn:     #9a6700;
      --login-left-bg:  #1a4a63;
      --login-right-bg: #ffffff;
      --input-autofill: #ffffff;
      --icon-soft: #5b6b7f;
      --th-bg:       #f0f2f5;
      --hover-row:   #f0f2f5;
      --badge-green-bg: #dafbe1; --badge-green-fg: #1a7f37;
      --badge-blue-bg:  #ddf4ff; --badge-blue-fg:  #0969da;
      --badge-gray-bg:  #eaeef2;
      --badge-yellow-bg:#fff8c5; --badge-yellow-fg:#7a5c00;
      --badge-red-bg:   #ffebe9; --badge-red-fg:   #b32424;
    }
    /* Fix hardcoded white elements in light system mode */
    [data-theme="system"] .tab            { color: rgba(0,0,0,0.55); }
    [data-theme="system"] .tab:hover      { color: var(--text); }
    [data-theme="system"] .tab.active     { color: var(--accent); }
    [data-theme="system"] .tab-count      { color: var(--muted); }
    [data-theme="system"] .tab.active .tab-count { background: #a8e6cf; color: #000; }
    [data-theme="system"] #header-version .hv-num { color: var(--text); }
    [data-theme="system"] #header-version .hv-ver { color: var(--muted); }
    [data-theme="system"] .hv-apic        { color: var(--accent); }
    [data-theme="system"] table thead th  { background: var(--th-bg); color: var(--muted); }
    [data-theme="system"] .badge          { border: 1px solid var(--border); }
  }
  /* Theme toggle button */
  #theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    border-radius: var(--radius);
    padding: 4px 10px;
    font-size: 14px;
    cursor: pointer;
    line-height: 1;
    transition: border-color 0.2s, color 0.2s;
  }
  #theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { font-size: 14px; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    min-height: 100vh;
  }

  /* ---- Top bar ---- */
  header {
    border-bottom: 1px solid var(--border);
    padding: 14px 32px;
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--header-bg);
    position: sticky; top: 0; z-index: 100;
    position: relative;
  }
  header .logo {
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.05em;
    white-space: nowrap;
  }
  header .logo span { color: #a0aab8; font-weight: 400; transition: border-bottom 0.15s; border-bottom: 1px solid transparent; padding-bottom: 1px; }
  header .logo span:hover {
    border-bottom: 1px solid var(--accent);
  }
  #header-version {
    display: none;
    font-family: var(--sans);
    font-size: 13px;
    white-space: nowrap;
  }
  #header-version .hv-apic { color: var(--accent); font-weight: 700; }
  #header-version .hv-ver  { color: #a0aab8; font-weight: 400; }
  #header-version .hv-num  { color: #ffffff; font-weight: 700; }
  header .status {
    margin-left: auto;
    font-size: 13px;
    font-family: var(--sans);
    color: #a0aab8;
    display: flex; align-items: center; gap: 8px;
  }
  .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border); }
  .dot.on  { background: var(--accent); box-shadow: 0 0 6px var(--accent); }
  .dot.off { background: var(--danger); }

  /* ---- Layout ---- */
  .wrap { max-width: 1400px; margin: 0 auto; padding: 32px; }

  /* ---- Login card ---- */
  #login-panel {
    max-width: 780px;
    margin: 80px auto;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--border);
    display: flex;
  }
  .wrap.login-wrap {
    padding: 32px;
  }
  #login-left {
    background: var(--login-left-bg);
    width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 32px;
    gap: 16px;
  }
  #login-left .ll-logo {
    font-family: var(--sans);
    font-size: 36px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.05em;
  }
  #login-left .ll-sub {
    font-family: var(--sans);
    font-size: 12px;
    color: rgba(255,255,255,0.5);
    text-align: center;
    letter-spacing: 0.05em;
  }
  #login-left .ll-version {
    font-family: var(--sans);
    font-size: 13px;
    color: rgba(255,255,255,0.7);
    text-align: center;
    margin-top: 8px;
  }
  #login-left .ll-cisco {
    font-family: var(--sans);
    font-size: 11px;
    color: rgba(255,255,255,0.3);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-top: 24px;
  }
  #login-right {
    background: var(--login-right-bg);
    flex: 1;
    padding: 48px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  #login-right h2 {
    font-family: var(--sans);
    font-size: 15px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 6px;
  }
  #login-right p { color: var(--muted); font-size: 12px; margin-bottom: 28px; }

  label { display: block; font-size: 12px; color: var(--text); margin-bottom: 6px; font-family: var(--sans); }
  input[type=text], input[type=password], input[type=url], select {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--sans);
    font-size: 13px;
    padding: 10px 14px;
    margin-bottom: 18px;
    outline: none;
    transition: border-color 0.15s;
  }
  input:-webkit-autofill,
  input:-webkit-autofill:hover,
  input:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0 1000px var(--input-autofill) inset !important;
    -webkit-text-fill-color: var(--text) !important;
    transition: background-color 5000s ease-in-out 0s;
    caret-color: var(--text);
  }
  input:focus, select:focus { border-color: var(--accent); }
  select option { background: var(--surface); }

  button {
    background: var(--accent);
    color: #000;
    border: none;
    border-radius: var(--radius);
    padding: 10px 22px;
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s, transform 0.1s;
  }
  button:hover { opacity: 0.88; }
  button:active { transform: scale(0.98); }
  button.secondary {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
  }
  button.danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
  }
  button:disabled { opacity: 0.4; cursor: not-allowed; }

  .btn-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

  /* ---- Main dashboard ---- */
  #dashboard { display: none; overflow: hidden; }

  .controls {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 24px 28px;
    margin-bottom: 28px;
    display: flex;
    align-items: flex-end;
    gap: 20px;
    flex-wrap: wrap;
  }
  .controls .field { flex: 1; min-width: 200px; }
  .controls .field label { margin-bottom: 6px; }
  .controls .field select { margin-bottom: 0; }

  /* ---- Tabs ---- */
  .tabs { display: flex; gap: 2px; margin-bottom: 0; border-bottom: 1px solid var(--border); }
  .tab {
    padding: 10px 20px;
    font-family: var(--sans);
    font-size: 12px;
    font-weight: 600;
    color: rgba(255,255,255,0.65);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: color 0.15s;
    user-select: none;
  }
  .tab:hover { color: var(--text); }
  .tab.active { color: var(--accent); border-bottom-color: var(--accent); }
  .tab-count {
    display: inline-block;
    background: var(--border);
    border-radius: 20px;
    padding: 1px 7px;
    font-size: 10px;
    margin-left: 6px;
    color: var(--muted);
  }
  .tab.active .tab-count { background: var(--accent); color: #000; }

  /* ---- Table panel ---- */
  .panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 10px 10px;
    overflow: hidden;
  }
  .panel-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .panel-header input[type=text] {
    width: 240px;
    margin-bottom: 0;
    padding: 7px 12px;
    font-size: 12px;
  }
  .panel-header .csv-btn { margin-left: auto; }
  .csv-btn { font-size: 12px; padding: 7px 16px; }

  .table-wrap { overflow-x: auto; max-height: calc(100vh - 220px); overflow-y: auto; }
  table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--sans);
    font-size: 12px;
  }
  thead { position: sticky; top: 0; z-index: 2; }
  th {
    background: var(--th-bg);
    color: var(--muted);
    font-weight: 600;
    text-align: left;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
    letter-spacing: 0.04em;
    font-size: 11px;
    text-transform: uppercase;
  }
  td {
    padding: 9px 14px;
    border-bottom: 1px solid #1c2128;
    color: var(--text);
    white-space: nowrap;
  }
  tr:last-child td { border-bottom: none; }
  tr:hover td { background: var(--hover-row); }

  /* Badges */
  .badge {
    display: inline-block;
    border-radius: 4px;
    padding: 2px 8px;
    font-size: 11px;
    font-weight: 600;
  }
  .badge-green  { background: var(--badge-green-bg); color: var(--badge-green-fg); }
  .badge-blue   { background: var(--badge-blue-bg); color: var(--badge-blue-fg); }
  .badge-gray   { background: var(--badge-gray-bg); color: var(--muted); }
  .badge-yellow { background: var(--badge-yellow-bg); color: var(--badge-yellow-fg); }
  .badge-red    { background: var(--badge-red-bg); color: var(--badge-red-fg); }

  /* ---- Error banner ---- */
  #error-banner {
    display: none;
    background: #2d1010;
    border: 1px solid var(--danger);
    border-radius: 8px;
    padding: 14px 20px;
    margin-bottom: 20px;
    font-family: var(--sans);
    font-size: 12px;
    color: var(--danger);
    word-break: break-all;
  }

  /* ---- State messages ---- */
  .empty {
    padding: 60px 20px;
    text-align: center;
    color: var(--accent);
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.05em;
  }
  .empty .icon { font-size: 48px; margin-bottom: 16px; opacity: 0.4; }

  /* ---- Toast ---- */
  #toast {
    position: fixed;
    bottom: 28px; right: 28px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px 20px;
    font-family: var(--sans);
    font-size: 12px;
    color: var(--text);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.2s, transform 0.2s;
    z-index: 999;
    max-width: 400px;
    word-break: break-all;
  }
  #toast.show { opacity: 1; transform: translateY(0); }
  #toast.error { border-color: var(--danger); color: var(--danger); }
  #toast.success { border-color: var(--accent); }

  /* ---- Welcome screen ---- */
  #welcome-panel {
    max-width: 1100px;
    margin: 72px auto 40px;
  }
  #welcome-panel h2 {
    font-family: var(--sans);
    font-size: 30px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 8px;
    letter-spacing: 0.03em;
  }
  #welcome-panel p {
    color: var(--muted);
    font-size: 15px;
    margin-bottom: 32px;
  }
  .welcome-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 16px;
  }
  .welcome-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px 32px;
    cursor: pointer;
    transition: border-color 0.15s, transform 0.1s;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .welcome-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
  }
  .welcome-card .wc-icon { font-size: 36px; }
  .welcome-card .wc-title {
    font-family: var(--sans);
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
  }
  .welcome-card .wc-desc {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.65;
  }

  /* ---- Fault Summary Widget ---- */
  .fault-widget {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px 28px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
  }
  .fault-widget-title {
    font-family: var(--sans);
    font-size: 12px;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
  }
  .fault-counters {
    display: flex;
    gap: 12px;
    flex: 1;
  }
  .fault-counter {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 5px 0;
    min-width: 50px;
  }
  .fault-counter .fc-num {
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.1;
  }
  .fault-counter .fc-label {
    font-family: var(--sans);
    font-size: 8px;
    font-weight: 600;
    letter-spacing: 0.06em;
    margin-top: 2px;
    text-transform: uppercase;
  }
  .fault-counter.critical .fc-num   { color: var(--danger); }
  .fault-counter.critical .fc-label { color: var(--danger); opacity: 0.8; }
  .fault-counter.critical { border-color: rgba(255,80,80,0.25); }
  .fault-counter.major    .fc-num   { color: #f0a500; }
  .fault-counter.major    .fc-label { color: #f0a500; opacity: 0.8; }
  .fault-counter.major    { border-color: rgba(240,165,0,0.25); }
  .fault-counter.minor    .fc-num   { color: #4a9eff; }
  .fault-counter.minor    .fc-label { color: #4a9eff; opacity: 0.8; }
  .fault-counter.minor    { border-color: rgba(74,158,255,0.25); }
  .fault-counter.warning  .fc-num   { color: var(--muted); }
  .fault-counter.warning  .fc-label { color: var(--muted); opacity: 0.8; }
  .fault-counter.warning  { border-color: rgba(139,148,158,0.25); }
  .fault-counter.total    .fc-num   { color: var(--text); }
  .fault-counter.total    .fc-label { color: var(--muted); opacity: 0.8; }
  .fault-counter.total    { border-color: rgba(255,255,255,0.1); }
  .fault-widget-actions { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; flex-shrink: 0; margin-left: 8px; }
  .fault-ts { font-size: 11px; color: var(--muted); font-family: var(--sans); white-space: nowrap; }

  /* ---- Accordion cards (Tenant tab) ---- */
  .accordion { display: flex; flex-direction: column; gap: 12px; padding: 20px; }
  .acc-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
  }
  .acc-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    cursor: pointer;
    user-select: none;
    transition: background 0.15s;
  }
  .acc-header:hover { background: var(--hover-row); }
  .acc-icon { font-size: 18px; }
  .acc-title {
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
  }
  .acc-badge {
    margin-left: auto;
    background: var(--border);
    border-radius: 20px;
    padding: 2px 10px;
    font-size: 11px;
    font-family: var(--sans);
    color: var(--muted);
  }
  .acc-chevron {
    font-size: 11px;
    color: var(--muted);
    transition: transform 0.2s;
    margin-left: 4px;
  }
  .acc-card.open .acc-chevron { transform: rotate(180deg); }
  .acc-body { display: none; border-top: 1px solid var(--border); }
  .acc-card.open .acc-body { display: block; }
  .acc-body table { font-size: 12px; }
  .acc-body th { background: var(--th-bg); }
  .acc-body .subnet-list {
    display: flex; flex-wrap: wrap; gap: 4px;
  }
  .subnet-pill {
    background: var(--badge-blue-bg);
    color: var(--badge-blue-fg);
    border-radius: 4px;
    padding: 2px 8px;
    font-size: 11px;
    font-family: var(--sans);
  }
  .scope-pub  { background: var(--badge-green-bg); color: var(--badge-green-fg); }
  .scope-priv { background: var(--badge-yellow-bg); color: var(--badge-yellow-fg); }
  #tenant-select-wrap {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
  }
  #tenant-select-wrap select {
    width: 280px;
    margin-bottom: 0;
    padding: 8px 12px;
    font-size: 13px;
  }
  #tenant-panel { display: none; }

  .spinner {
    display: none;
    width: 16px; height: 16px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
  }
  @keyframes spin { to { transform: rotate(360deg); } }