/* ============================================================
   Conjunction BIM 2.0 — Design system
   Dark professional theme inspired by Autodesk/Revit
   ============================================================ */
:root {
  --bg-app: #1a1a1a;
  --bg-panel: #232323;
  --bg-panel-hover: #2a2a2a;
  --bg-panel-active: #2f3a4a;
  --bg-viewport: #141414;
  --bg-modal: #2a2a2a;
  --border: #3a3a3a;
  --border-accent: #4a7dbd;

  --text-primary: #e8e8e8;
  --text-secondary: #999;
  --text-muted: #666;
  --text-accent: #5b9bd5;
  --text-success: #4caf50;
  --text-warn: #ff9800;
  --text-error: #f44336;

  --accent: #4a7dbd;
  --accent-hover: #5b9bd5;
  --accent-active: #3a6dad;

  --topbar-h: 44px;
  --panel-w: 220px;
  --props-w: 300px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; height: 100%; overflow: hidden; background: var(--bg-app); color: var(--text-primary); font-family: var(--font); font-size: 13px; }

/* ---- Topbar ---- */
.topbar {
  height: var(--topbar-h);
  background: #111;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px; padding: 0 12px;
  flex-shrink: 0; position: relative; z-index: 100;
}
.topbar-logo { display: flex; align-items: center; gap: 8px; color: var(--text-accent); font-weight: 600; font-size: 14px; min-width: 140px; }
.topbar-logo svg { opacity: .85; }
.topbar-center { display: flex; gap: 4px; position: absolute; left: 50%; transform: translateX(-50%); }
.topbar-right { display: flex; align-items: center; gap: 6px; margin-left: auto; }

.tb-btn {
  background: transparent; border: 1px solid var(--border); color: var(--text-secondary);
  padding: 4px 10px; border-radius: 4px; cursor: pointer; font-size: 12px; font-family: var(--font);
  transition: all .15s;
}
.tb-btn:hover { background: var(--bg-panel-hover); border-color: var(--accent); color: var(--text-primary); }
.tb-btn.active { background: var(--bg-panel-active); border-color: var(--border-accent); color: var(--text-accent); }

.dag-status {
  width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted);
  transition: background .3s; cursor: default;
}
.dag-status.recalculating { background: var(--text-warn); animation: pulse 0.6s ease-in-out infinite; }
.dag-status.done { background: var(--text-success); }
@keyframes pulse { 0%,100% { opacity:1 } 50% { opacity:.4 } }

/* ---- Main layout ---- */
.main-layout {
  display: flex;
  height: calc(100vh - var(--topbar-h));
  overflow: hidden;
}

/* ---- Level panel ---- */
.level-panel {
  width: var(--panel-w); flex-shrink: 0;
  background: var(--bg-panel); border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow-y: auto;
}

.panel-header {
  padding: 8px 12px; font-size: 10px; font-weight: 600; letter-spacing: .1em;
  color: var(--text-muted); text-transform: uppercase; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  flex-shrink: 0;
}
.close-btn {
  background: transparent; border: none; cursor: pointer; color: var(--text-muted);
  font-size: 14px; line-height: 1; padding: 2px 4px;
  border-radius: 3px; transition: color .15s;
}
.close-btn:hover { color: var(--text-error); }

.level-item {
  padding: 8px 12px; cursor: pointer; border-bottom: 1px solid var(--border);
  transition: background .1s; display: flex; justify-content: space-between; align-items: center;
}
.level-item:hover { background: var(--bg-panel-hover); }
.level-item.active { background: var(--bg-panel-active); }
.level-name { color: var(--text-primary); font-size: 12px; }
.level-elev { color: var(--text-muted); font-family: var(--font-mono); font-size: 11px; }

/* ---- Viewport area ---- */
.viewport-area {
  flex: 1; display: flex; flex-direction: column; background: var(--bg-viewport); overflow: hidden;
  position: relative;
}
.view-3d { flex: 1; position: relative; border-bottom: 1px solid var(--border); }
.view-split { display: flex; height: 200px; flex-shrink: 0; }
.view-plan { flex: 1; position: relative; border-right: 1px solid var(--border); }
.view-section { flex: 1; position: relative; }

.view-label {
  position: absolute; top: 6px; left: 10px; z-index: 5;
  font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em;
  color: var(--text-muted); pointer-events: none;
}
canvas { display: block; width: 100% !important; height: 100% !important; }

/* ---- Properties panel ---- */
.properties-panel {
  width: var(--props-w); flex-shrink: 0;
  background: var(--bg-panel); border-left: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
}
.properties-panel.hidden { width: 0; overflow: hidden; }

#properties-content {
  flex: 1; overflow-y: auto; padding-bottom: 12px;
}
.props-empty {
  padding: 24px 16px; text-align: center; color: var(--text-muted);
  display: flex; flex-direction: column; gap: 8px;
}
.props-empty .hint { font-size: 11px; }

/* ---- Props sections ---- */
.props-section { border-bottom: 1px solid var(--border); }
.props-section-header {
  padding: 7px 12px; font-size: 10px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--text-muted);
  cursor: pointer; user-select: none;
  display: flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.02);
}
.props-section-header:hover { background: var(--bg-panel-hover); }
.props-section-header .chevron { font-size: 8px; transition: transform .2s; margin-left: auto; }
.props-section-header.collapsed .chevron { transform: rotate(-90deg); }
.props-section-body { padding: 4px 0; }
.props-section-body.hidden { display: none; }

.prop-row {
  display: flex; align-items: center; padding: 4px 12px; gap: 8px;
  min-height: 28px;
}
.prop-row:hover { background: rgba(255,255,255,.02); }
.prop-label { flex: 0 0 100px; color: var(--text-secondary); font-size: 11px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.prop-value { flex: 1; }

.prop-input {
  width: 100%; background: rgba(255,255,255,.06); border: 1px solid var(--border);
  color: var(--text-primary); padding: 3px 7px; border-radius: 3px; font-size: 12px;
  font-family: var(--font-mono); outline: none; transition: border-color .15s;
}
.prop-input:focus { border-color: var(--accent); background: rgba(74,125,189,.08); }
.prop-input.error { border-color: var(--text-error); }
.prop-input.readonly { color: var(--text-muted); cursor: default; background: transparent; border-color: transparent; }

.prop-readonly { color: var(--text-muted); font-family: var(--font-mono); font-size: 12px; }
.prop-select {
  width: 100%; background: rgba(255,255,255,.06); border: 1px solid var(--border);
  color: var(--text-primary); padding: 3px 7px; border-radius: 3px; font-size: 12px;
  outline: none; cursor: pointer; transition: border-color .15s;
}
.prop-select:focus { border-color: var(--accent); }
.prop-checkbox { width: 14px; height: 14px; cursor: pointer; accent-color: var(--accent); }

/* Layers list */
.layers-list { padding: 4px 12px; }
.layer-row {
  display: flex; align-items: center; gap: 6px; padding: 3px 0;
  border-bottom: 1px solid rgba(255,255,255,.04);
  font-size: 11px; color: var(--text-secondary);
}
.layer-fn-badge {
  font-size: 9px; padding: 1px 5px; border-radius: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .05em;
}
.layer-fn-badge.structure { background: rgba(74,125,189,.2); color: #7baed4; }
.layer-fn-badge.insulation { background: rgba(255,152,0,.15); color: #ffb74d; }
.layer-fn-badge.finish { background: rgba(76,175,80,.15); color: #81c784; }
.layer-fn-badge.air { background: rgba(255,255,255,.08); color: var(--text-muted); }
.layer-add-btn {
  display: flex; align-items: center; gap: 4px; margin: 6px 12px 0; padding: 4px 8px;
  background: transparent; border: 1px dashed var(--border); border-radius: 4px;
  color: var(--text-muted); font-size: 11px; cursor: pointer; transition: all .15s;
  width: calc(100% - 24px);
}
.layer-add-btn:hover { border-color: var(--accent); color: var(--text-accent); }

/* Props footer (delete, undo) */
.props-footer {
  padding: 10px 12px; border-top: 1px solid var(--border);
  display: flex; gap: 8px; flex-shrink: 0;
}
.btn-delete {
  flex: 1; background: transparent; border: 1px solid rgba(244,67,54,.3);
  color: var(--text-error); padding: 6px; border-radius: 4px; font-size: 12px;
  cursor: pointer; transition: all .15s;
}
.btn-delete:hover { background: rgba(244,67,54,.1); border-color: var(--text-error); }
.btn-undo {
  flex: 1; background: transparent; border: 1px solid var(--border);
  color: var(--text-secondary); padding: 6px; border-radius: 4px; font-size: 12px;
  cursor: pointer; transition: all .15s;
}
.btn-undo:hover { border-color: var(--accent); color: var(--text-accent); }

/* Selected element highlight */
.element-selected { outline: 2px solid var(--accent) !important; }

/* ---- Modals ---- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.65);
  display: flex; align-items: center; justify-content: center; z-index: 1000;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: var(--bg-modal); border: 1px solid var(--border);
  border-radius: 8px; min-width: 340px; overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.modal-header { padding: 14px 16px; font-weight: 600; border-bottom: 1px solid var(--border); color: var(--text-accent); }
.modal-body { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.modal-body label { display: flex; flex-direction: column; gap: 4px; color: var(--text-secondary); font-size: 12px; }
.modal-footer { padding: 12px 16px; display: flex; gap: 8px; justify-content: flex-end; border-top: 1px solid var(--border); }
.btn-primary { background: var(--accent); border: none; color: #fff; padding: 7px 16px; border-radius: 4px; cursor: pointer; font-size: 12px; transition: background .15s; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: transparent; border: 1px solid var(--border); color: var(--text-secondary); padding: 7px 16px; border-radius: 4px; cursor: pointer; font-size: 12px; }
.btn-secondary:hover { border-color: var(--accent); color: var(--text-primary); }
.input-field {
  background: rgba(255,255,255,.06); border: 1px solid var(--border);
  color: var(--text-primary); padding: 6px 10px; border-radius: 4px; font-size: 12px;
  outline: none; transition: border-color .15s;
}
.input-field:focus { border-color: var(--accent); }

/* ---- Toast ---- */
#toast-container { position: fixed; bottom: 16px; right: 16px; display: flex; flex-direction: column; gap: 8px; z-index: 2000; }
.toast {
  background: #2a2a2a; border: 1px solid var(--border);
  padding: 10px 16px; border-radius: 6px; font-size: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,.4); max-width: 280px;
  animation: slideIn .2s ease; color: var(--text-primary);
}
.toast.success { border-color: var(--text-success); }
.toast.error { border-color: var(--text-error); }
@keyframes slideIn { from { transform: translateX(20px); opacity:0 } to { transform: translateX(0); opacity:1 } }

/* ---- 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: #555; }

/* ---- Element count badge ---- */
.el-count { font-size: 10px; color: var(--text-muted); background: rgba(255,255,255,.06); padding: 2px 6px; border-radius: 10px; }

/* ---- Recalculating shimmer on read-only values ---- */
@keyframes shimmer { 0%,100% { opacity:1 } 50% { opacity:.5 } }
.recalculating { animation: shimmer .8s ease-in-out infinite; }

/* ---- WebSocket presence bar ---- */
.presence-bar {
  display: flex; align-items: center; gap: 4px; padding: 0 4px;
}
.presence-dot {
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--text-muted); border: 2px solid rgba(255,255,255,.15);
  display: flex; align-items: center; justify-content: center;
  font-size: 9px; font-weight: 700; color: #fff;
  flex-shrink: 0; cursor: default; transition: background .3s;
}
.presence-dot.remote {
  opacity: 0.85;
}

/* WebSocket status indicator */
.ws-status {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--text-muted); transition: background .3s; cursor: default;
}
.ws-status.connected { background: #2ecc71; }
.ws-status.connecting { background: var(--text-warn); animation: pulse 0.8s ease-in-out infinite; }
.ws-status.disconnected { background: var(--text-error); }

/* ---- Remote selection highlight (colored outline on selected mesh) ---- */
/* Applied via canvas overlay — actual Three.js coloring handled in JS */

/* ---- Ghost cursor overlay ---- */
.cursor-overlay {
  position: absolute; inset: 0; pointer-events: none; z-index: 10; overflow: hidden;
}
.ghost-cursor {
  position: absolute; pointer-events: none;
  display: flex; flex-direction: column; align-items: flex-start; gap: 2px;
  transform: translate(-4px, -4px);
}
.ghost-cursor-dot {
  width: 10px; height: 10px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,.4);
  flex-shrink: 0;
}
.ghost-cursor-label {
  font-size: 10px; font-weight: 600; padding: 1px 5px;
  border-radius: 3px; color: #fff; white-space: nowrap;
  opacity: .9; line-height: 1.4;
}