Header position change

Fixed --> absolute
Border change on About section

Gave border on all sides instead of just top
Formatting for about section text
Moved <a> to around the <div>

Hopefully this makes the entire div clickable instead of just the text?
Added event info

Team got me event info. Added text and formatting.
Speaker section changes

Added .visuallyhidden to speaker list and stay tuned title.
Spacing edits
Added slot for speaker picture