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var(--border-color);height:var(--gantt-header-height);flex-direction:column;display:flex;position:sticky;top:0;overflow:visible}.gantt-timeline-header-row{height:50%;display:flex}.gantt-header-cell{font-size:var(--font-size-xs);color:var(--text-secondary);border-right:1px solid var(--border-color-light);font-weight:var(--font-weight-medium);flex-shrink:0;justify-content:center;align-items:center;display:flex;overflow:hidden}.gantt-header-cell.today{color:var(--color-danger);font-weight:var(--font-weight-semibold)}.gantt-header-cell.sunday{color:#ef4444}.gantt-header-cell.saturday{color:#3b82f6}.gantt-grid{top:var(--gantt-header-height);pointer-events:none;z-index:1;position:absolute;bottom:0;left:0;right:0}.gantt-grid-col{border-right:1px solid 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