Homepage title doesn't align in IE11

[KyrietS]

Bug description

align-items: center; doesn't work in IE11 when used on container with min-width specified only.

Screenshot from IE11

More details

Workaround with details and discussion
philipwalton/flexbugs#231

Similar problem (Stackoverflow)
https://stackoverflow.com/questions/19371626/flexbox-not-centering-vertically-in-ie

Suggested solution

.section-intro should have: height instead of min-height. There is overflow: hidden anyway so this change shouldn't cause any changes at all. This change fixes aligning in IE11 though.

Homepage after applied fix

Tested on

Internet Explorer 11
Version: 11.615.17763.0
Update version: 11.0.135

[terrylinooo]

IE doesn't support CSS flexbox.

[KyrietS]

IE11 has partial support with some bugs. See:
https://caniuse.com/#search=CSS%20Flexible%20Box%20Layout

Look at Known issues tab. Our problem is mentioned there.
I understand that IE11 support is not important but except for this homepage title aligning bug, whole website with Mynote looks great. So if we can fix it with one simple change, I think it's worth it.

If you don't want to mess with IE anyway, that's ok. I accept that.