clean up designs

ref.
  http://css.eweb-design.com/0807_sb.html (overflow: scroll)
  http://mbsupport.dip.jp/hp/form_10.htm (textarea rows cols)
  http://www.htmq.com/style/border-style.shtml (border)
  http://www.htmq.com/style/border.shtml (border)
  http://www.htmq.com/style/height.shtml (height, max-height)
  http://ginpen.com/2012/12/24/fix-window-height/ (html, body: height, margin)