.panel-section { border-bottom: 1px solid #2a2a2a; }
.panel-section-header { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; cursor: pointer; background: #0f0f0f; transition: background 0.15s ease; user-select: none; }
.panel-section-header:hover { background: #1a1a1a; }
.panel-section-header h3 { font-size: 14px; font-weight: 500; margin: 0; }
.panel-section-toggle { font-size: 16px; color: #888; transition: transform 0.2s ease; }
.panel-section-header.collapsed .panel-section-toggle { transform: rotate(-90deg); }
.panel-section-content { max-height: 2000px; overflow: hidden; transition: max-height 0.3s ease; }
.panel-section-header.collapsed + .panel-section-content { max-height: 0; }
.object-list-section { border-bottom: 1px solid #1a1a1a; }
.object-list-section-header { padding: 8px 16px; font-size: 11px; color: #666; text-transform: uppercase; letter-spacing: 0.5px; background: #0a0a0a; }