.sidebar { width: 340px; background-color: var(--bg-panel); border-right: 1px solid var(--border); display: flex; flex-direction: column; transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1), width 0.3s; z-index: 40; flex-shrink: 0; box-shadow: 4px 0 15px rgba(0,0,0,0.02); }
        .sidebar.collapsed { margin-left: -340px; }

        .search-box { padding: 15px; border-bottom: 1px solid var(--border); background: var(--bg-panel); display: flex; flex-direction: column; gap: 10px; }
        .search-container { position: relative; }
        .search-container i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--text-sec); font-size: 0.95rem; }
        .search-box input, .search-box select { width: 100%; border-radius: 10px; border: 1.5px solid var(--border); background: var(--bg-dark); color: var(--text-main); outline: none; font-size: 0.85rem; font-weight: 600; padding: 10px 12px; transition: 0.3s; }
        .search-box input { padding-left: 38px; }
        .search-box select { cursor: pointer; }
        .search-box input:focus, .search-box select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15); background: var(--bg-panel); }
        
        .bg-loader-container { background: rgba(59, 130, 246, 0.1); border-bottom: 1px solid var(--border); padding: 10px 18px; display: none; align-items: center; gap: 10px; font-size: 0.8rem; font-weight: 700; color: var(--primary); }
        .bg-loader-container .spinner { width: 16px; height: 16px; border-width: 2px; margin: 0; border-color: rgba(59,130,246,0.3); border-top-color: var(--primary); }

        .file-list { flex: 1; overflow-y: auto; padding: 12px; scroll-behavior: smooth; }
        .file-item { padding: 12px; background: var(--bg-panel); border: 1px solid var(--border); border-radius: 10px; margin-bottom: 8px; cursor: pointer; display: flex; flex-direction: column; gap: 6px; position: relative; overflow: hidden; transition: all 0.2s; }
        .file-item:hover { border-color: var(--primary); transform: translateX(2px); box-shadow: var(--shadow-sm); }
        .file-item.active { background: var(--bg-card); border-color: var(--primary); }
        .file-item.active::before { content: ''; position: absolute; left: 0; top: 0; height: 100%; width: 4px; background: var(--primary); }
        .file-item.evaluated::before { content: ''; position: absolute; left: 0; top: 0; height: 100%; width: 4px; background: var(--success); }
        .file-title { font-weight: 800; font-size: 0.9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--text-main); letter-spacing: -0.01em; }
        .file-meta { font-size: 0.75rem; color: var(--text-sec); display: flex; justify-content: space-between; align-items: center; font-weight: 600; }
        .file-date { background: var(--bg-dark); padding: 3px 6px; border-radius: 6px; border: 1px solid var(--border); }