app/assets/stylesheets/_print.sass
@media print
*
background: transparent !important
color: black !important
text-shadow: none !important
filter: none !important
-ms-filter: none !important
a, a:visited
text-decoration: underline
.main a[href]:after
content: " (" attr(href) ")"
abbr[title]:after
content: " (" attr(title) ")"
.ir a:after, a[href^="#"]:after
content: ""
pre, blockquote
border: 1px solid #999
page-break-inside: avoid
thead
display: table-header-group
tr, img
page-break-inside: avoid
img
max-width: 100% !important
@page
margin: 0.5cm
p, h2, h3
orphans: 3
widows: 3
h2, h3
page-break-after: avoid