:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #22263a;
  --border: #2e3250;
  --accent: #4f8ef7;
  --accent2: #7c3aed;
  --text: #e2e8f0;
  --text-muted: #8892a4;
  --success: #22c55e;
  --warn: #f59e0b;
  --danger: #ef4444;

  /* node type colors */
  --c-device: #4f8ef7;
  --c-ga: #22c55e;
  --c-space: #f59e0b;
  --c-line: #a78bfa;
  --c-area: #fb923c;
  --c-co: #94a3b8;
  --c-func: #f472b6;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Top bar ─────────────────────────────────────────────── */
#topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

#topbar h1 { font-size: 1rem; font-weight: 700; color: var(--accent); white-space: nowrap; }

#upload-zone {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

#file-input { display: none; }

.btn {
  padding: 6px 14px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  transition: opacity .15s;
}
.btn:hover { opacity: .85; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
.btn-sm { padding: 4px 10px; font-size: 0.78rem; }
.btn-danger { background: var(--danger); color: #fff; }

#project-info { font-size: 0.8rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#stats-bar {
  display: flex;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.stat-item { white-space: nowrap; }
.stat-item span { color: var(--text); font-weight: 600; }

/* ── Start page ──────────────────────────────────────────────── */
#start-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 24px 60px;
  gap: 32px;
  min-height: 100%;
}

#start-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}

#start-app-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, #b91c1c, #7c3aed);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  box-shadow: 0 8px 32px rgba(185, 28, 28, 0.4);
  margin-bottom: 4px;
}

#start-version-badge {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 12px;
  font-size: .72rem;
  color: var(--text-muted);
  letter-spacing: .03em;
}

#start-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -.02em;
  margin: 0;
}

#start-subtitle {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

#start-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 440px;
}

.start-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px 0;
  border-radius: 10px;
  font-size: .95rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: opacity .15s, transform .1s;
  text-decoration: none;
  letter-spacing: .01em;
}
.start-btn:hover { opacity: .88; transform: translateY(-1px); }
.start-btn:active { transform: translateY(0); }

.start-btn-primary {
  background: linear-gradient(135deg, #b91c1c 0%, #991b1b 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(185, 28, 28, 0.35);
}

.start-btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
}

.start-link {
  font-size: .82rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 0;
  text-decoration: none;
  transition: color .15s;
}
.start-link:hover { color: var(--accent); }

#start-recent {
  width: 100%;
  max-width: 860px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

#start-recent-header {
  padding: 12px 20px;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

#start-recent-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .82rem;
}

#start-recent-table thead th {
  padding: 9px 16px;
  text-align: left;
  font-size: .67rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

#start-recent-table tbody tr {
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background .12s;
}
#start-recent-table tbody tr:last-child { border-bottom: none; }
#start-recent-table tbody tr:hover { background: var(--surface2); }

#start-recent-table tbody td {
  padding: 13px 16px;
  color: var(--text);
  font-weight: 500;
}
#start-recent-table tbody td:first-child { font-weight: 700; }

.start-status-active {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: .72rem;
  font-weight: 700;
}
.start-status-saved {
  background: var(--surface2);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: .72rem;
  font-weight: 600;
}

#global-search {
  margin-left: auto;
  position: relative;
}
#global-search input {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 5px 10px 5px 30px;
  font-size: 0.82rem;
  width: 220px;
}
#global-search input:focus { outline: none; border-color: var(--accent); }
#global-search .icon { position: absolute; left: 8px; top: 50%; transform: translateY(-50%); opacity: .5; }
#search-results {
  position: absolute;
  top: 100%;
  right: 0;
  width: 360px;
  max-height: 300px;
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  z-index: 1000;
  display: none;
}
.search-result-item {
  padding: 8px 12px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}
.search-result-item:hover { background: var(--surface2); }
.search-result-item .type-badge {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  margin-right: 6px;
}

/* ── Tabs ────────────────────────────────────────────────── */
#tabs {
  display: flex;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  padding: 0 16px;
}
.tab {
  padding: 10px 18px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: color .15s;
  white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Main content ────────────────────────────────────────── */
#content {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.view { display: none; flex: 1; overflow: hidden; }
.view.active { display: flex; }

/* ── Upload placeholder ──────────────────────────────────── */
#view-upload {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
#upload-drop {
  border: 2px dashed var(--border);
  border-radius: 16px;
  padding: 60px 80px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s;
}
#upload-drop:hover, #upload-drop.dragover { border-color: var(--accent); }
#upload-drop .icon-large { font-size: 3rem; margin-bottom: 12px; opacity: .5; }
#upload-drop p { color: var(--text-muted); font-size: 0.9rem; }
#upload-drop h2 { margin-bottom: 8px; }

/* ── Split layout (tree + detail) ───────────────────────── */
.split {
  display: flex;
  flex: 1;
  overflow: hidden;
}
.pane-left {
  width: 340px;
  min-width: 200px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.pane-right {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}
.pane-toolbar {
  padding: 10px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 8px;
  align-items: center;
  flex-shrink: 0;
}
.pane-toolbar input {
  flex: 1;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 5px 8px;
  font-size: 0.82rem;
}
.pane-toolbar input:focus { outline: none; border-color: var(--accent); }

/* ── Tree ────────────────────────────────────────────────── */
.tree { padding: 8px 0; font-size: 0.83rem; }
.tree-node { }
.tree-label {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  cursor: pointer;
  user-select: none;
  border-radius: 4px;
  margin: 1px 4px;
  transition: background .1s;
}
.tree-label:hover { background: var(--surface2); }
.tree-label.selected { background: rgba(79,142,247,.2); color: var(--accent); }
.tree-toggle { width: 14px; font-size: 0.7rem; flex-shrink: 0; opacity: .6; }
.tree-icon { flex-shrink: 0; font-size: 0.9rem; }
.tree-text { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-badge {
  background: var(--surface2);
  padding: 1px 6px;
  border-radius: 10px;
  font-size: 0.7rem;
  color: var(--text-muted);
  flex-shrink: 0;
}
.tree-children { padding-left: 18px; }
.tree-children.collapsed { display: none; }

/* ── Detail panel ────────────────────────────────────────── */
.detail-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}
.detail-card h3 { font-size: 0.95rem; margin-bottom: 12px; color: var(--accent); }
.detail-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 16px;
  font-size: 0.82rem;
}
.detail-grid .label { color: var(--text-muted); white-space: nowrap; }
.detail-grid .value { word-break: break-all; }

/* ── Tables ──────────────────────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.data-table th {
  background: var(--surface2);
  padding: 8px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  position: sticky;
  top: 0;
  z-index: 1;
}
.data-table td { padding: 7px 12px; border-bottom: 1px solid var(--border); }
.data-table tr:hover td { background: var(--surface); }
.data-table tr.expandable { cursor: pointer; }
.data-table .sub-row { background: var(--surface2); }
.data-table .sub-row td { padding: 4px 12px 4px 32px; color: var(--text-muted); }

/* ── Flags ───────────────────────────────────────────────── */
.flags { display: flex; gap: 4px; }
.flag {
  display: inline-block;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  text-align: center;
  line-height: 20px;
  font-size: 0.65rem;
  font-weight: 700;
}
.flag.on { background: rgba(79,142,247,.3); color: var(--accent); }
.flag.off { background: var(--surface2); color: var(--border); }

/* ── Badge / chips ───────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
}
.badge-device { background: rgba(79,142,247,.2); color: var(--c-device); }
.badge-ga { background: rgba(34,197,94,.2); color: var(--c-ga); }
.badge-space { background: rgba(245,158,11,.2); color: var(--c-space); }
.badge-line { background: rgba(167,139,250,.2); color: var(--c-line); }
.badge-area { background: rgba(251,146,60,.2); color: var(--c-area); }
.badge-co { background: rgba(148,163,184,.2); color: var(--c-co); }

/* ── Cytoscape container ─────────────────────────────────── */
#cy-container {
  flex: 1;
  background: var(--bg);
  position: relative;
}
#cy {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
}
#cy-controls {
  position: absolute;
  bottom: 16px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 10;
}
#cy-legend {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(26,29,39,.9);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-size: 0.75rem;
  z-index: 10;
}
#cy-legend h4 { margin-bottom: 6px; color: var(--text-muted); }
.legend-item { display: flex; align-items: center; gap: 6px; margin-bottom: 3px; }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

/* ── Network view ────────────────────────────────────────── */
#view-network { flex-direction: column; }
#network-search-bar {
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 10px;
  align-items: center;
  flex-shrink: 0;
}
#network-search-bar input {
  flex: 1;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 7px 12px;
  font-size: 0.85rem;
}
#network-search-bar input:focus { outline: none; border-color: var(--accent); }
#network-split { flex: 1; display: flex; overflow: hidden; }
#network-detail {
  width: 300px;
  flex-shrink: 0;
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 14px;
  font-size: 0.82rem;
}

/* ── Loading overlay ─────────────────────────────────────── */
#loading {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
}
#loading.show { display: flex; }
.spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Topology network ───────────────────────────────────── */
#view-topology { flex-direction: row; }

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

/* ── GA list inline chips ────────────────────────────────── */
.ga-chip {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(34,197,94,.15);
  color: var(--c-ga);
  font-size: 0.75rem;
  cursor: pointer;
  margin: 1px;
}
.ga-chip:hover { background: rgba(34,197,94,.3); }

/* password prompt */
#pw-row { display: flex; gap: 8px; align-items: center; font-size: 0.82rem; }
#pw-row input {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 5px 8px;
}

/* ── Projektkarten ───────────────────────────────────────────── */
.proj-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.proj-card:hover { border-color: var(--accent); background: var(--surface2); }
.proj-card-active { border-color: var(--accent) !important; }
.proj-card-selected { background: var(--surface2); }

/* ── Network filter bar ──────────────────────────────────────── */
#net-filter-bar {
  display: flex;
  gap: 5px;
  align-items: center;
  flex-wrap: wrap;
  padding: 6px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
#net-filter-bar .filter-label {
  font-size: .73rem;
  color: var(--text-muted);
  white-space: nowrap;
  margin-right: 2px;
}
.filter-btn {
  padding: 3px 9px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text-muted);
  font-size: .73rem;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.filter-btn.active {
  color: var(--text);
  border-color: currentColor;
}
.filter-btn[data-layer="building"].active  { color: #a5b4fc; border-color: #6366f1; background: rgba(99,102,241,.15); }
.filter-btn[data-layer="buildingpart"].active { color: #818cf8; border-color: #4f46e5; background: rgba(79,70,229,.12); }
.filter-btn[data-layer="floor"].active     { color: #93c5fd; border-color: #3b82f6; background: rgba(59,130,246,.15); }
.filter-btn[data-layer="room"].active      { color: #bfdbfe; border-color: #60a5fa; background: rgba(96,165,250,.15); }
.filter-btn[data-layer="distributionboard"].active { color: #d1d5db; border-color: #9ca3af; background: rgba(156,163,175,.12); }
.filter-btn[data-layer="topo"].active      { color: #c4b5fd; border-color: #a78bfa; background: rgba(167,139,250,.12); }
.filter-sep { width: 1px; height: 16px; background: var(--border); margin: 0 3px; }

/* ── Ordnerbaum (verbessert) ─────────────────────────────────── */
.folder-row {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.1s;
  position: relative;
  user-select: none;
}
.folder-row:hover { background: var(--surface2); }
.folder-row.folder-active { background: rgba(79,142,247,0.12); color: var(--accent); }
.folder-toggle {
  font-size: .65rem;
  width: 12px;
  flex-shrink: 0;
  color: var(--text-muted);
  cursor: pointer;
}
.folder-name {
  flex: 1;
  font-size: .82rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.folder-actions { display: none; gap: 2px; flex-shrink: 0; }
.folder-row:hover .folder-actions { display: flex; }

/* ── Breadcrumb ──────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: .78rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  padding: 0 2px;
  flex-wrap: wrap;
}
.breadcrumb-item {
  cursor: pointer;
  transition: color 0.1s;
  padding: 1px 4px;
  border-radius: 4px;
}
.breadcrumb-item:hover { color: var(--text); background: var(--surface2); }
.breadcrumb-item.active { color: var(--text); font-weight: 600; }
.breadcrumb-sep { opacity: 0.4; font-size: .7rem; }

/* ── Modal ───────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  min-width: 280px;
  max-width: 340px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
}
.modal-box h4 { font-size: .9rem; margin-bottom: 6px; color: var(--text); }
.modal-folder-list {
  max-height: 220px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-top: 10px;
}
.modal-folder-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: .82rem;
  transition: background 0.1s;
  border-bottom: 1px solid var(--border);
}
.modal-folder-option:last-child { border-bottom: none; }
.modal-folder-option:hover { background: var(--surface2); }
.modal-folder-option.modal-selected { background: rgba(79,142,247,0.12); color: var(--accent); }
.modal-actions { display: flex; gap: 8px; margin-top: 16px; justify-content: flex-end; }

/* ── Löschbestätigung (Doppelklick) ─────────────────────────── */
.btn-delete-pending { background: rgba(239,68,68,0.12) !important; color: var(--danger) !important; border: 1px solid rgba(239,68,68,0.3) !important; }

/* ── Fehler-Panel ────────────────────────────────────────────── */
#error-panel {
  background: rgba(239, 68, 68, 0.08);
  border-top: 2px solid var(--danger);
  border-bottom: 1px solid rgba(239, 68, 68, 0.25);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  max-height: 180px;
}
#error-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  font-size: .8rem;
  font-weight: 600;
  color: var(--danger);
  flex-shrink: 0;
}
#error-text {
  flex: 1;
  resize: none;
  background: transparent;
  border: none;
  color: var(--text);
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: .75rem;
  line-height: 1.5;
  padding: 0 12px 8px;
  outline: none;
  overflow-y: auto;
  white-space: pre-wrap;
}
#error-copy-btn.copied { color: var(--success) !important; }