具有可滚动内容的角度材料md卡

I have an md-card that consists of an md-header and scrollable md-card-content. As the scrollable content gets taller, the header gets smaller and smaller for some reason. The width of the card can change and the header can possibly wrap around to 2 or 3 lines so a min-height on the header isn't a solution. The problem exists in latest IE and Chrome, not FF.I have an md-card that consists of an md-header