#back_to_top { font-family: 'Pictos', sans-serif; opacity: 0; transition: visibility 0s, opacity 0.2s linear; visibility: hidden; }

@media only print, only screen and (max-width: 959px) {
  #back_to_top.show { bottom: 60px; line-height: 35px; opacity: 1; position: fixed; right: 40px; visibility: visible; z-index: 9999; }
  #back_to_top.show a { background: rgba(0,0,0,0.25); border-radius: 8px; color: #fff; display: inline-block; font-size: 35px; padding: 0.25em 0.3em 0.2em; text-decoration: none; }
}