.intro-collapse{transition:max-height .3s cubic-bezier(.23,1,.32,1),opacity .25s cubic-bezier(.23,1,.32,1)}.intro-toggle-btn{transition:background-color .16s cubic-bezier(.23,1,.32,1),transform .16s cubic-bezier(.23,1,.32,1)}.intro-toggle-btn:active{transform:scale(.97)}