.bg_parallels{position:absolute;left:0;top:0;width:100%;height:500px;background-size:cover;background-attachment:fixed;background-repeat:no-repeat;-webkit-animation:scrollUp 3s linear;animation:scrollUp 3s linear;background-position-y:20%}@-webkit-keyframes scrollUp{0%{background-position-y:0}to{background-position-y:20%}}@keyframes scrollUp{0%{background-position-y:0}to{background-position-y:20%}}.flex_wrapper{display:flex;flex-direction:row;justify-content:space-around;align-items:flex-start}.flex_wrapper .grow{flex-grow:3}.content_sidebar{min-width:300px;background:var(--content-bg-color);margin-right:50px;padding:20px;border-radius:10px}.content_sidebar a{padding:.5em 0 .5em 30px;color:var(--main-text-color);position:relative}.content_sidebar nav{display:flex;flex-direction:column}.content_sidebar nav nav a{padding-left:45px;position:relative}.content_sidebar nav nav a:before{content:"◎";opacity:.5}.content_sidebar a.active{color:var(--main-link-color)}.content_sidebar a.active:before{content:" ";position:absolute;left:0;top:11px;margin-left:3px;margin-top:3px;width:12px;height:12px;background:var(--main-link-color);border-radius:50%}.content_sidebar a.active:after{content:" ";position:absolute;left:0;top:11px;width:18px;height:18px;border:1px solid var(--main-link-color);border-radius:50%}.content_sidebar nav.sub{padding-left:2em}h1.border{border-bottom:1px solid rga(63,63,63,.2)}main.content h2{margin:.5em 0}main.content h3{margin:.5em 0 .5em 2em}main.content p{padding:.5em 0 .5em 2em;text-indent:2em;line-height:22px}main.content .open{border-bottom:1px solid rgba(63,63,63,.2);padding:.35em 0;position:relative;cursor:pointer}main.content .open:before{position:absolute;content:" ";width:18px;height:18px;background:url(/assets/plus.png) no-repeat 50%;background-size:18px 18px;right:10px;top:10px}main.content .open.opened:before{background-image:url(/assets/minus.png)}