/* ========== Theme variables: single source for light/dark ========== */
:root {
  --panel-w: 320px;
  --panel-right-w: 420px; /* right panel (properties) width */
  /* Dark theme (default) */
  --app-bg: #171a21;
  --app-text: #e5e7eb;
  --app-text-muted: #94a3b8;
  --panel-bg: #0f1117;
  --panel-bg-alt: #171a21;
  --panel-border: #20232a;
  --input-bg: #1f2937;
  --input-text: #e5e7eb;
  --input-border: #374151;
  --btn-bg: #1f2937;
  --btn-text: #e5e7eb;
  --btn-border: #374151;
  --accordion-bg: rgba(0, 0, 0, 0.15);
  --accordion-bg-expanded: rgba(0, 0, 0, 0.25);
  --accordion-body-bg: rgba(0, 0, 0, 0.08);
  --accordion-border: #334155;
  --center-bg: #2b2f36;
  --muted: #94a3b8;
  --accent: #3b82f6;
  --accent-light: #38bdf8;
  --focus-ring: #3b82f6;
  --navbar-bg: rgba(0, 0, 0, 0.12);
  --dropdown-bg: #0f1117;
  --footer-bg: #171a21;
  --footer-border: #20232a;
  --footer-text: #cbd5e1;
  /* Diagram (for getDiagramTheme()) */
  --diagram-bg: #050816;
  --diagram-grid: rgba(255, 255, 255, 0.05);
  --diagram-node-fill: #111827;
  --diagram-node-stroke: #1f2937;
  --diagram-container-fill: #020617;
  --diagram-container-stroke: #1e293b;
  --diagram-header-fill: #0f172a;
  --diagram-header-text: #e5e7eb;
  --diagram-selection-stroke: #38bdf8;
  --diagram-alignment-guide: rgba(56, 189, 248, 0.6);
  /* Properties panel: label/input/view/object tokens */
  --prop-label: #94a3b8;
  --input: #374151;
  --foreground: #e5e7eb;
  --prop-placeholder: #6b7280;
  --view-input-bg: rgba(245, 158, 11, 0.12);
  --view-bg: rgba(245, 158, 11, 0.2);
  --view-fg: #fef3c7;
  --view-border: rgba(245, 158, 11, 0.5);
  --obj-bg: rgba(30, 64, 175, 0.15);
  --obj-border: rgba(59, 130, 246, 0.4);
  --obj-fg: #dbeafe;
  --muted-foreground: #9ca3af;
  /* Shared tokens for section headings, separators, and danger actions */
  --section-heading: #e5e7eb;
  --tree-separator: #9ca3af;
  --danger-bg: #7f1d1d;
  --danger-border: #b91c1c;
  --danger-text: #fecaca;
}

[data-theme="light"] {
  --app-bg: #f1f5f9;
  --app-text: #1e293b;
  --app-text-muted: #64748b;
  --panel-bg: #f1f5f9;
  --panel-bg-alt: #f8fafc;
  --panel-border: #e2e8f0;
  --input-bg: #ffffff;
  --input-text: #1e293b;
  --input-border: #cbd5e1;
  --btn-bg: #ffffff;
  --btn-text: #1e293b;
  --btn-border: #cbd5e1;
  --accordion-bg: rgba(0, 0, 0, 0.04);
  --accordion-bg-expanded: rgba(0, 0, 0, 0.08);
  --accordion-body-bg: rgba(0, 0, 0, 0.02);
  --accordion-border: #e2e8f0;
  --center-bg: #e2e8f0;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-light: #2563eb;
  --focus-ring: #2563eb;
  --navbar-bg: rgba(248, 250, 252, 0.95);
  --dropdown-bg: #ffffff;
  --footer-bg: #f8fafc;
  --footer-border: #e2e8f0;
  --footer-text: #475569;
  --diagram-bg: #f8fafc;
  --diagram-grid: rgba(0, 0, 0, 0.08);
  --diagram-node-fill: #ffffff;
  --diagram-node-stroke: #cbd5e1;
  --diagram-container-fill: #f8fafc;
  --diagram-container-stroke: #cbd5e1;
  --diagram-header-fill: #e2e8f0;
  --diagram-header-text: #1e293b;
  --diagram-selection-stroke: #2563eb;
  --diagram-alignment-guide: rgba(37, 99, 235, 0.6);
  --prop-label: #64748b;
  --input: #cbd5e1;
  --foreground: #1e293b;
  --prop-placeholder: #94a3b8;
  --view-input-bg: rgba(245, 158, 11, 0.08);
  --view-bg: rgba(245, 158, 11, 0.15);
  --view-fg: #92400e;
  --view-border: rgba(245, 158, 11, 0.4);
  --obj-bg: rgba(30, 64, 175, 0.1);
  --obj-border: rgba(59, 130, 246, 0.35);
  --obj-fg: #1e40af;
  --muted-foreground: #64748b;
  --section-heading: #0f172a;
  --tree-separator: #64748b;
  --danger-bg: #fee2e2;
  --danger-border: #ef4444;
  --danger-text: #b91c1c;
}

/* Base scale and page structure */
html { font-size: 14px; position: relative; min-height: 100%; height: 100%; }
@media (min-width: 768px) { html { font-size: 16px; } }
body { margin: 0 0 52px 0; background: var(--app-bg); color: var(--app-text); min-height: 100%; }
main.pb-3 { padding-bottom: 0 !important; }

/* Header */
.app-header { position: sticky; top: 0; z-index: 1030; box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.app-navbar { background: var(--panel-bg); }
.app-navbar .navbar-brand { color: var(--app-text); font-weight: 600; letter-spacing: 0.2px; }
.app-navbar .navbar-brand:hover { color: var(--app-text); }
.app-navbar .nav-link { color: var(--app-text); opacity: 0.9; }
.app-navbar .nav-link:hover, .app-navbar .nav-link:focus { color: var(--app-text); opacity: 1; }

/* Navbar Models/Diagrams tab links – theme-aware (no Bootstrap btn-dark) */
.app-navbar .nav-tab-link {
  border-radius: 6px;
  border: 1px solid transparent;
  color: var(--app-text);
  background: var(--accordion-bg);
}
.app-navbar .nav-tab-link:hover,
.app-navbar .nav-tab-link:focus {
  background: var(--accordion-bg-expanded);
  color: var(--app-text);
  border-color: var(--panel-border);
}
[data-theme="light"] .app-navbar .nav-tab-link {
  background: transparent;
  color: var(--app-text);
}
[data-theme="light"] .app-navbar .nav-tab-link:hover,
[data-theme="light"] .app-navbar .nav-tab-link:focus {
  background: var(--panel-bg-alt);
  border-color: var(--input-border);
  color: var(--app-text);
}
.navbar-toggler { border-color: var(--input-border); }
.navbar-toggler-icon { filter: invert(1); }

/* Footer */
.app-footer { position: fixed; left: 0; right: 0; bottom: 0; height: 52px; background: var(--footer-bg); color: var(--footer-text); border-top: 1px solid var(--footer-border); }
.app-footer .footer-link { color: var(--accent); text-decoration: none; }
.app-footer .footer-link:hover { color: var(--accent-light); text-decoration: underline; }

/* Focus styles */
.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem var(--app-bg), 0 0 0 0.25rem var(--focus-ring);
}

/* Forms */
.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder { color: var(--app-text-muted); text-align: end; }
.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder { text-align: start; }

/* Utility panel polish: left/right panels (Render + Models) */
.render-toolbar, .render-properties {
  background: linear-gradient(180deg, var(--panel-bg-alt) 0%, var(--panel-bg) 100%);
  border-color: var(--panel-border) !important;
  color: var(--app-text);
  padding: 12px;
  overflow: auto;
}
.render-toolbar { flex: 0 0 var(--panel-w); border-right: 1px solid var(--panel-border); }
.render-properties { flex: 0 0 var(--panel-right-w); border-left: 1px solid var(--panel-border); }
.render-toolbar h4, .render-properties h4 { color: var(--app-text); margin: 0 0 8px 0; font-size: 0.95rem; letter-spacing: .2px; }
.render-toolbar .toolbar-row, .render-properties .toolbar-row { gap: 8px; margin-bottom: 6px; }
.render-toolbar .toolbar-row label { font-size: .9rem; }
.render-toolbar button, .render-toolbar select, .render-toolbar input[type="text"], .render-toolbar input[type="number"],
.render-properties button, .render-properties select, .render-properties input[type="text"], .render-properties input[type="number"],
.app-input {
  background: var(--input-bg); color: var(--input-text); border: 1px solid var(--input-border); border-radius: 6px; padding: 6px 10px; line-height: 1.2; transition: background .15s, border-color .15s, transform .05s;
  box-sizing: border-box;
}
.app-input::placeholder {
  color: var(--prop-placeholder);
}
.render-toolbar button:hover, .render-properties button:hover { background: var(--btn-bg); filter: brightness(1.1); border-color: var(--input-border); }
.render-toolbar button:active, .render-properties button:active { transform: translateY(1px); }
.render-toolbar select:hover, .render-properties select:hover { border-color: var(--muted); }
.render-toolbar button { font-weight: 600; }

/* Render center area */
.render-center { flex: 1 1 auto; background: var(--center-bg) !important; position: relative; min-width: 0; min-height: 0; overflow: hidden; }

/* Render layout structure */
.render-layout { display: flex; flex-direction: row; height: calc(100vh - 52px - 56px); width: 100%; gap: 0; }
#app { width: 100%; height: 100%; overflow: auto; box-sizing: border-box; }
.toolbar { display: flex; flex-direction: column; gap: 10px; }

/* Diagram basics */
.de-box { border-radius: 8px; }

/* Global: use theme variables */
html, body {
  background: var(--app-bg);
  color: var(--app-text);
}

main, .py-3 {
  background: transparent;
}

/* Footer */
footer.bg-light, .bg-light {
  background-color: var(--footer-bg) !important;
  border-top: 1px solid var(--footer-border) !important;
  color: var(--footer-text) !important;
}

footer .text-muted { color: var(--app-text-muted) !important; }
footer .text-dark { color: var(--app-text) !important; }
footer .text-primary { color: var(--accent) !important; }

/* Navbar form controls (system/diagram selects) */
.navbar .form-select {
  background: var(--input-bg);
  color: var(--input-text);
  border-color: var(--input-border);
}
.navbar .form-select:focus {
  border-color: var(--focus-ring);
  box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.25);
}

/* Navbar */
.navbar {
  background-color: var(--navbar-bg);
}

.navbar .nav-link,
.navbar .navbar-brand,
.navbar .dropdown-item,
.navbar .user-name-navbar {
  color: var(--app-text) !important;
}

.dropdown-menu {
  background: var(--dropdown-bg);
  color: var(--app-text);
  border: 1px solid var(--panel-border);
}

.dropdown-menu .dropdown-item {
  color: var(--app-text) !important;
}
.dropdown-menu .dropdown-divider {
  border-color: var(--panel-border);
}

/* Cards and tables: theme-aware for light/dark */
.card {
  background: var(--panel-bg);
  border-color: var(--panel-border);
  color: var(--app-text);
}
.card-header {
  background: var(--panel-bg-alt);
  border-bottom-color: var(--panel-border);
  color: var(--app-text);
}
.card-body {
  background: var(--panel-bg);
  color: var(--app-text);
}
.table {
  color: var(--app-text);
}
.table thead th {
  border-bottom-color: var(--panel-border);
  color: var(--app-text);
}
.table td,
.table th {
  border-color: var(--panel-border);
}
.table-striped > tbody > tr:nth-of-type(odd) {
  background: var(--accordion-body-bg);
}
.form-control,
.form-select {
  background: var(--input-bg);
  border-color: var(--input-border);
  color: var(--input-text);
}
.form-control:focus,
.form-select:focus {
  background: var(--input-bg);
  border-color: var(--focus-ring);
  color: var(--input-text);
}
.form-control::placeholder {
  color: var(--app-text-muted);
}
.form-check-label {
  color: var(--app-text);
}
.btn-outline-secondary {
  border-color: var(--input-border);
  color: var(--app-text);
}
.btn-outline-secondary:hover {
  background: var(--accordion-body-bg);
  border-color: var(--input-border);
  color: var(--app-text);
}
.btn-outline-danger {
  border-color: var(--bs-danger);
  color: var(--bs-danger);
}
.btn-outline-danger:hover {
  background: rgba(var(--bs-danger-rgb, 220, 53, 69), 0.15);
  color: var(--bs-danger);
}

/* App-wide alert/confirm modals: preserve newlines in message text */
#appAlertModal .modal-body,
#appConfirmModal .modal-body {
  white-space: pre-line;
}

/* Modal (e.g. Save Image) theme-aware */
.modal-content {
  background: var(--dropdown-bg);
  border-color: var(--panel-border);
  color: var(--app-text);
}
.modal-header {
  border-bottom-color: var(--panel-border);
}
.modal-footer {
  border-top-color: var(--panel-border);
}
.modal-header .btn-close {
  filter: invert(1);
}
[data-theme="light"] .modal-header .btn-close {
  filter: none;
}

/* Truncate company name container (keeps parity with layout) */
#companyDropdown {
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: inline-block;
  vertical-align: middle;
}

/* Light theme: only overrides that need to differ from variables (e.g. navbar toggler icon) */
[data-theme="light"] .navbar-toggler {
  border-color: var(--input-border);
}

[data-theme="light"] .navbar-toggler-icon {
  filter: none;
}

[data-theme="light"] .dropdown-menu .dropdown-item:hover {
  background: var(--accordion-body-bg);
}

/* ========== Accordions in panels (Render + Models) ========== */
.render-toolbar .accordion-item,
.render-properties .accordion-item,
.render-properties-accordion .accordion-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--accordion-border);
}
.render-properties-accordion .accordion-item:last-child { border-bottom: none; }
.render-toolbar .accordion-button,
.render-properties .accordion-button,
.render-properties-accordion .accordion-button {
  background: var(--accordion-bg);
  color: var(--app-text);
  border: none;
  font-size: 0.9rem;
  padding: 8px 12px;
}
.render-toolbar .accordion-button:not(.collapsed),
.render-properties .accordion-button:not(.collapsed),
.render-properties-accordion .accordion-button:not(.collapsed) {
  background: var(--accordion-bg-expanded);
  color: var(--app-text);
  box-shadow: none;
}
.render-toolbar .accordion-button:hover,
.render-properties .accordion-button:hover,
.render-properties-accordion .accordion-button:hover {
  background: var(--accordion-bg-expanded);
  color: var(--app-text);
}
.render-properties-accordion .accordion-button::after {
  filter: invert(1);
  opacity: 0.8;
}
[data-theme="light"] .render-properties-accordion .accordion-button::after {
  filter: none;
}
.render-toolbar .accordion-body,
.render-properties .accordion-body,
.render-properties-accordion .accordion-body {
  background: var(--accordion-body-bg);
  color: var(--app-text);
}

/* ========== Floating actions (Render) ========== */
.floating-actions {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 30;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0;
}
.floating-actions .main-action {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--input-border);
  background: var(--panel-bg);
  color: var(--app-text);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}
.floating-actions .main-action:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}
.floating-actions .action-btn {
  margin-top: 6px;
  padding: 8px 14px;
  min-width: 120px;
  border-radius: 999px;
  border: 1px solid var(--input-border);
  background: var(--panel-bg);
  color: var(--app-text);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s cubic-bezier(0.2, 0.9, 0.2, 1), opacity 0.2s ease, background 0.15s ease;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
}
.floating-actions.open .action-btn {
  max-height: 48px;
  opacity: 1;
  pointer-events: auto;
}
.floating-actions .action-btn:nth-child(2) { transition-delay: 30ms; }
.floating-actions .action-btn:nth-child(3) { transition-delay: 60ms; }
.floating-actions .action-btn:hover {
  filter: brightness(1.1);
  transform: translateX(-2px);
}
.floating-actions .action-btn.primary {
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  border-color: var(--accent);
  color: #fff;
}
.floating-actions .action-btn.primary:hover {
  filter: brightness(1.1);
}

/* ========== Markdown editor (Render) ========== */
.markdown-editor-wrap { display: flex; flex-direction: column; gap: 6px; }
.markdown-edit-area { display: flex; flex-direction: column; gap: 6px; }
.markdown-edit-area.hidden { display: none !important; }
.markdown-preview.only { min-height: 100px; }
.markdown-block { margin-bottom: 12px; }
.markdown-block-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.markdown-block-title { font-size: 0.9rem; font-weight: 600; color: var(--app-text); }
.markdown-block-toggle { min-width: 72px; }
.markdown-add-diagram-row { margin-top: 8px; margin-bottom: 4px; }
.markdown-add-diagram-row .md-btn { min-width: 160px; }
.markdown-toolbar {
  display: flex; flex-wrap: wrap; gap: 4px; align-items: center;
  padding: 4px 0; border-bottom: 1px solid var(--accordion-border);
}
.markdown-toolbar .md-btn {
  min-width: 28px; height: 28px; padding: 0 6px;
  background: var(--input-bg); border: 1px solid var(--input-border); border-radius: 4px;
  color: var(--app-text); font-size: 12px; cursor: pointer;
}
.markdown-toolbar .md-btn:hover { filter: brightness(1.1); }
.markdown-textarea {
  width: 100%; min-height: 120px; resize: vertical;
  background: var(--input-bg); color: var(--input-text); border: 1px solid var(--input-border);
  border-radius: 6px; padding: 8px; font-size: 0.85rem; font-family: inherit;
  box-sizing: border-box;
}
.markdown-textarea:focus { outline: none; border-color: var(--focus-ring); }
.markdown-preview {
  min-height: 80px; max-height: 240px; overflow: auto;
  padding: 8px; background: var(--input-bg); border: 1px solid var(--input-border);
  border-radius: 6px; font-size: 0.85rem; line-height: 1.5;
  color: var(--app-text);
}
.markdown-preview h1, .markdown-preview h2 { margin: 0.5em 0 0.25em; font-size: 1rem; }
.markdown-preview pre, .markdown-preview code { background: var(--accordion-bg-expanded); padding: 2px 4px; border-radius: 4px; }
.markdown-preview pre { padding: 8px; overflow: auto; }
.markdown-preview ul, .markdown-preview ol { margin: 0.25em 0; padding-left: 1.25em; }
#markdown-context-label { font-size: 0.75rem; opacity: 0.85; }

/* ========== Properties panel (Render) ========== */
.properties-section {
  border: 1px solid var(--input-border);
  border-radius: 8px;
  padding: 10px;
  margin-top: 10px;
  background: var(--accordion-body-bg);
}
.properties-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.prop-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  min-height: 2rem;
}
.prop-row.align-top { align-items: start; padding-top: 8px; }
.prop-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--prop-label);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.prop-value-cell {
  display: flex;
  align-items: center;
  gap: 6px;
}
.prop-input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  border-radius: 6px;
  border: 1px solid var(--input);
  background: var(--input-bg);
  transition: border-color 0.15s, background 0.15s;
}
.prop-input-wrap.view-mode { background: var(--view-input-bg); border-color: var(--view-border); }
.prop-input {
  flex: 1;
  min-width: 0;
  padding: 6px 8px;
  font-size: 0.75rem;
  border: none;
  background: transparent;
  color: var(--foreground);
  outline: none;
}
.prop-input::placeholder { color: var(--prop-placeholder); }
.view-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  margin-right: 6px;
  font-size: 10px;
  font-weight: 500;
  line-height: 1;
  border-radius: 4px;
  background: var(--view-bg);
  color: var(--view-fg);
  border: 1px solid var(--view-border);
  white-space: nowrap;
  user-select: none;
}
.view-badge svg { width: 10px; height: 10px; flex-shrink: 0; }
.override-checkbox-label {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  border: 1px solid var(--view-border);
  background: var(--view-bg);
  color: var(--view-fg);
  font-size: 10px;
  font-weight: 500;
  transition: background 0.15s, border-color 0.15s;
  flex-shrink: 0;
}
.override-checkbox-label svg { width: 12px; height: 12px; }
.override-checkbox-label input.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.prop-special-shell {
  display: flex;
  align-items: center;
  border-radius: 6px;
  border: 1px solid var(--input);
  background: var(--input-bg);
  overflow: hidden;
  transition: border-color 0.15s;
}
.prop-obj-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 8px;
  border: none;
  border-right: 1px solid var(--obj-border);
  font-size: 10px;
  font-weight: 500;
  background: var(--obj-bg);
  color: var(--obj-fg);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}
.prop-obj-btn.view-active { background: var(--view-bg); color: var(--view-fg); border-right-color: var(--view-border); }
.prop-obj-btn svg { width: 12px; height: 12px; flex-shrink: 0; }
.prop-add-btn {
  padding: 6px 8px;
  border: none;
  border-left: 1px solid var(--input);
  background: transparent;
  color: var(--muted-foreground);
  cursor: pointer;
  transition: color 0.15s, opacity 0.15s;
  flex-shrink: 0;
}
.prop-add-btn:hover:not(:disabled) { color: var(--foreground); }
.prop-add-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.prop-add-btn svg { width: 14px; height: 14px; }
.properties-grid label { opacity: .9; font-size: .85rem; color: var(--app-text); }
.properties-grid .align-top { align-self: start; }
.properties-grid input,
.properties-grid select,
.properties-grid textarea {
  background: var(--input-bg);
  color: var(--input-text);
  border: 1px solid var(--input-border);
  border-radius: 6px;
  padding: 6px 8px;
  width: 100%;
  box-sizing: border-box;
}
.properties-grid input[readonly],
.properties-grid textarea[readonly] { opacity: .9; }
.properties-grid input:disabled,
.properties-grid select:disabled,
.properties-grid textarea:disabled { opacity: .7; cursor: not-allowed; }
.small-note { font-size: .8rem; opacity: .8; margin-top: 6px; color: var(--app-text-muted); }
.comments-list { max-height: 200px; overflow-y: auto; }
#comments-content,
#comments-content .small-note,
#comments-content .comment-item,
#comments-content .comment-item div,
#comments-content .text-muted,
#comments-content .form-check-label,
#comments-content label { color: var(--app-text) !important; }
#comments-content .comment-item .text-muted { color: var(--app-text-muted) !important; }
#comments-content #comment-text {
  background: var(--input-bg);
  color: var(--input-text);
  border-color: var(--input-border);
}
#comments-content #comment-text::placeholder { color: var(--app-text-muted); }
.property-input-wrapper { position: relative; display: flex; flex-direction: column; gap: 0; }
.property-input-wrapper .input-row { display: flex; align-items: center; gap: 6px; }
.property-input-wrapper .input-row input,
.property-input-wrapper .input-row select,
.property-input-wrapper .input-row textarea { flex: 1; }
.diagram-indicator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  background: var(--accent);
  color: #fff;
  border-radius: 3px;
  font-size: 11px;
  font-weight: bold;
  cursor: help;
  flex-shrink: 0;
}
.override-controls {
  display: none;
  align-items: center;
  gap: 6px;
  font-size: .75rem;
  color: var(--app-text-muted);
  margin-top: 4px;
  padding: 4px 8px;
  background: var(--accordion-bg);
  border-radius: 4px;
  white-space: nowrap;
}
.property-input-wrapper:hover .override-controls,
.property-input-wrapper:focus-within .override-controls,
.override-controls:focus-within,
.override-controls:hover { display: flex; }
.override-controls label { display: flex; align-items: center; gap: 4px; margin: 0; cursor: pointer; font-size: .75rem; opacity: 1; }
.override-controls input[type="checkbox"] { width: auto; margin: 0; cursor: pointer; }
.label-editor { margin-top: 4px; }
.label-editor .kv-row,
.label-editor .kv-add-row { display: flex; align-items: center; gap: 6px; margin: 2px 0; }
.icon-btn {
  padding: 4px 10px;
  font-size: 0.8rem;
  cursor: pointer;
  border-radius: 4px;
  border: 1px solid var(--input-border);
  background: var(--btn-bg);
  color: var(--btn-text);
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.icon-btn.small {
  padding: 2px 8px;
  font-size: 0.75rem;
}
.icon-btn.subtle-danger {
  border-color: var(--danger-border);
  color: var(--danger-border);
  background: transparent;
}
.icon-btn.subtle-danger:hover {
  background: var(--accordion-body-bg);
}

/* Diagram item hover: magnifying glass */
.diagram-item-group .diagram-search-icon { opacity: 0; transition: opacity 0.15s ease; }
.diagram-item-group:hover .diagram-search-icon { opacity: 1; }
.diagram-search-icon:hover { opacity: 1 !important; }

.diagram-item-group .diagram-link-icon { opacity: 0.9; transition: opacity 0.15s ease; }
.diagram-item-group:hover .diagram-link-icon { opacity: 1; }
.diagram-link-icon:hover { opacity: 1 !important; }

/* ========== Diagrams popup ========== */
.diagrams-popup {
  position: fixed;
  z-index: 10000;
  min-width: 200px;
  max-width: 280px;
  background: var(--dropdown-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  padding: 8px 0;
  font-size: 0.9rem;
  visibility: visible;
  pointer-events: auto;
}
.diagrams-popup .popup-title { padding: 6px 12px; color: var(--app-text-muted); font-size: 0.8rem; border-bottom: 1px solid var(--panel-border); margin-bottom: 4px; }
.diagrams-popup .popup-item { padding: 8px 12px; cursor: pointer; color: var(--app-text); display: block; width: 100%; text-align: left; border: none; background: none; font-size: inherit; }
.diagrams-popup .popup-item:hover { background: var(--accordion-body-bg); color: var(--accent); }
.diagrams-popup .popup-item.new-diagram { border-top: 1px solid var(--panel-border); margin-top: 4px; padding-top: 10px; font-weight: 600; color: var(--accent); }
.diagrams-popup .popup-item.new-diagram:hover { background: var(--accordion-body-bg); }
.diagrams-popup .popup-empty { padding: 8px 12px; color: var(--app-text-muted); font-size: 0.85rem; }
.diagrams-popup .new-diagram-form { padding: 12px; }
.diagrams-popup .new-diagram-form label { display: block; color: var(--app-text-muted); font-size: 0.85rem; }
.diagrams-popup .new-diagram-form .form-row { display: flex; gap: 8px; align-items: center; margin-top: 8px; }
.diagrams-popup .new-diagram-form input[type="text"] { flex: 1; padding: 8px 10px; background: var(--input-bg); color: var(--input-text); border: 1px solid var(--input-border); border-radius: 6px; font-size: 0.9rem; box-sizing: border-box; }
.diagrams-popup .new-diagram-form .btn-create { padding: 8px 14px; background: var(--accent); color: #fff; border: none; border-radius: 6px; font-weight: 600; cursor: pointer; font-size: 0.9rem; }
.diagrams-popup .new-diagram-form .btn-create:hover { filter: brightness(1.1); }
.diagrams-popup .new-diagram-form .btn-create:disabled { opacity: 0.6; cursor: not-allowed; }

/* ========== Diagrams list page ========== */
.diagrams-sidebar .small.text-muted {
  color: var(--muted-foreground) !important;
}
.diagrams-center .text-muted {
  /* Make helper text clearly readable on dark cards */
  color: var(--app-text-muted) !important;
}
.diagrams-sidebar .list-group-item {
  background: transparent;
  color: var(--app-text);
  border-color: var(--panel-border);
  padding: 6px 10px;
  font-size: 0.85rem;
}
.diagrams-sidebar .list-group-item .text-dark {
  /* Ensure diagram names are visible in dark theme */
  color: var(--app-text) !important;
}
.diagrams-sidebar .list-group-item + .list-group-item {
  border-top-color: var(--panel-border);
}
.diagrams-sidebar .list-group-item.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.diagrams-sidebar .list-group-item.active:hover {
  background: var(--accent-light);
}

/* Keep sidebar action buttons readable, especially in light theme.
   Force background and text color for all sidebar buttons, including hover/active states. */
.render-layout .diagrams-sidebar .btn,
.render-layout .diagrams-sidebar .btn:hover,
.render-layout .diagrams-sidebar .btn:focus,
.render-layout .diagrams-sidebar .btn:active,
.render-layout .diagrams-sidebar .btn:focus-visible {
  background: var(--accordion-body-bg) !important;
  color: var(--app-text) !important;
  border-color: var(--panel-border) !important;
  box-shadow: none;
}

/* Stronger override for selected-row buttons that use outline-light */
.render-layout .diagrams-sidebar .list-group-item.active .btn-outline-light,
.render-layout .diagrams-sidebar .list-group-item.active .btn-outline-light:hover,
.render-layout .diagrams-sidebar .list-group-item.active .btn-outline-light:focus,
.render-layout .diagrams-sidebar .list-group-item.active .btn-outline-light:active {
  background: var(--accordion-body-bg) !important;
  color: var(--app-text) !important;
  border-color: var(--panel-border) !important;
}

.diagrams-center .card {
  background: var(--panel-bg);
  border-radius: 8px;
  border-color: var(--panel-border);
  color: var(--app-text);
}
.diagrams-center .card-body {
  padding: 16px 18px;
}
.diagrams-center .card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--section-heading);
  margin-bottom: 0.75rem;
}
.diagrams-center .table {
  background: var(--panel-bg);
  color: var(--input-text);
}
.diagrams-center .table thead th {
  border-color: var(--panel-border);
  background: var(--panel-bg-alt);
  color: var(--input-text);
  font-weight: 500;
}

/* Render page: keep left actions buttons readable in light theme */
.render-layout .render-toolbar .actions-container .btn {
  background: var(--accordion-body-bg);
  color: var(--app-text);
  border-color: var(--panel-border);
}
.render-layout .render-toolbar .actions-container .btn:hover,
.render-layout .render-toolbar .actions-container .btn:focus,
.render-layout .render-toolbar .actions-container .btn:active {
  background: var(--accordion-body-bg);
  color: var(--app-text);
  border-color: var(--panel-border);
  box-shadow: none;
}
.diagrams-center .table tbody tr {
  border-color: var(--panel-border);
  background: var(--panel-bg);
}
.diagrams-center .table-hover tbody tr:hover {
  background: var(--accordion-bg);
}
.diagrams-center .table tbody tr:nth-child(even) {
  background: var(--accordion-body-bg);
}
.diagrams-center .table tbody td,
.diagrams-center .table tbody th {
  background: inherit;
  color: var(--input-text);
}

.btn-delete-diagram,
.diagrams-delete-confirm-btn {
  border-color: var(--danger-border);
  color: var(--danger-border);
  background: transparent;
}
.btn-delete-diagram:hover,
.diagrams-delete-confirm-btn:hover {
  background: var(--danger-bg);
  color: var(--danger-text);
}

/* Comments page: full viewport height, center area and list use full height, list scrolls */
.comments-page-outer {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
}
/* Fallback when Layout uses py-3 instead of full-height: give comments area a minimum height */
main:not(.main-full-height) .py-3 .comments-page-outer {
  min-height: calc(100vh - 52px - 56px - 1.5rem);
}
.comments-page-outer .render-layout.comments-page {
  flex: 1 1 0;
  min-height: 0;
  height: auto;
}
.render-layout.comments-page .render-center.diagrams-center {
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.render-layout.comments-page .render-center.diagrams-center .comments-page-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.render-layout.comments-page .render-center.diagrams-center .card-body {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.render-layout.comments-page .comments-list.comments-list-scroll {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  max-height: none; /* override global .comments-list { max-height: 200px } */
}

/* Panel search inputs (Render objects search, Models search) */
.render-toolbar .accordion-body > input[type="text"],
.render-properties .accordion-body > input[type="text"] {
  width: 100%;
  margin-bottom: 8px;
}

/* ========== Models page: tree + centre ========== */
#modelsAccordion .accordion-button {
  font-weight: 600;
}
.objects-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
#objectsTree .tree-item { user-select: none; -webkit-user-select: none; }
.objects-tree {
  font-size: 0.85rem;
  color: var(--app-text);
  margin-top: 8px;
  padding: 4px 0;
  border-radius: 6px;
  background: var(--accordion-body-bg);
  border: 1px solid var(--panel-border);
  max-height: calc(100vh - 220px);
  overflow: auto;
}
.tree-item {
  margin: 2px 0;
  cursor: pointer;
  padding: 6px;
  border-radius: 4px;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--app-text);
}
.tree-item:hover {
  background-color: rgba(59, 130, 246, 0.1);
}
.tree-item.selected {
  background-color: rgba(59, 130, 246, 0.2);
  color: var(--accent);
}
.tree-icon {
  font-size: 0.75rem;
  width: 18px;
  text-align: center;
  opacity: 0.8;
  flex-shrink: 0;
}
.tree-label {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tree-type {
  font-size: 0.72rem;
  opacity: 0.6;
  text-transform: uppercase;
  color: var(--app-text-muted);
}
.tree-root-drop {
  padding: 6px 8px;
  margin-bottom: 6px;
  border: 1px dashed var(--panel-border);
  border-radius: 4px;
  font-size: 0.8rem;
  opacity: 0.9;
  color: var(--tree-separator);
  background: transparent;
}
.tree-root-drop.drag-over {
  background: var(--accordion-body-bg);
}
.objects-tree-separator {
  margin-top: 8px;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--tree-separator);
  opacity: 0.95;
}
.models-center {
  padding: 18px;
  color: var(--app-text);
  width: 100%;
  box-sizing: border-box;
  overflow: auto;
  max-width: 980px;
  margin: 0 auto;
}
.models-center #modelDetails {
  background: var(--panel-bg);
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  padding: 14px;
}
.model-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}
#modelTitle {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--section-heading);
}
#modelSummary {
  font-size: 0.85rem;
  color: var(--muted-foreground);
  opacity: 0.95;
}
.model-form {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.model-section-header {
  margin: 12px 0 8px;
}
.model-section-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--prop-label);
}
.model-field-row {
  margin-bottom: 10px;
}
.model-field-label {
  display: block;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--prop-label);
}
.model-field-input,
.model-field-select,
.model-inline-input {
  width: 100%;
}
.prop-list {
  background: var(--accordion-body-bg);
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
}
.label-key-group {
  margin-bottom: 12px;
  padding: 10px;
  border-radius: 6px;
  background: var(--accordion-bg);
  border: 1px solid var(--panel-border);
}
.label-key-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}
.label-key-group-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--prop-label);
}
.label-key-group .kv-row,
.label-key-group .kv-add-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 6px;
}
.model-delete-row {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--panel-border);
  display: flex;
  justify-content: flex-end;
}
.model-delete-btn {
  background: var(--danger-bg);
  color: var(--danger-text);
  border-color: var(--danger-border);
  font-size: 0.8rem;
  padding: 6px 12px;
}
.model-delete-btn:hover {
  filter: brightness(1.05);
}
.model-delete-btn:focus {
  box-shadow: 0 0 0 0.1rem var(--app-bg), 0 0 0 0.25rem var(--danger-border);
}