Hello.

I am quite new to CSS so lots to learn.

I have an old HTML frameset that I am trying to change into modern CSS. Can anyone give me tips, what is the easiest way to accomplish this transition?

<HTML>
<HEAD>
<TITLE></TITLE>
<frameset rows="80,*">
<FRAME SRC="header.html" NAME="header" frameborder=1 marginheight=0 marginwidth=0 SCROLLING=AUTO NORESIZE>
<frameset cols="264,*">
<frameset rows="330,*">
<FRAME SRC="middle.html" NAME="middle" frameborder=1 marginheight=0 marginwidth=0 SCROLLING=AUTO>
<FRAME SRC="bottom.html" NAME="bottom" frameborder=1 marginheight=0 marginwidth=0 SCROLLING=AUTO>
</frameset>
<FRAME SRC="main.html" NAME="main" marginheight=0 marginwidth=0>
</frameset>
</frameset>
</HEAD>
</HTML>