.vksgn-navigation{background:#333;font-size:.8rem;position:relative;z-index:2001;*zoom:1}.vksgn-navigation:after{content:"";display:table;clear:both}.vksgn-navigation .demosite_message{display:none}@media(min-width: 768px){.vksgn-navigation{font-size:inherit}.vksgn-navigation.is_demo .demosite_message{display:inline-block;position:absolute;bottom:calc(100% - 1px);left:50%;background:#333;font-size:.8em;padding:.5em 1em 0;margin:0;line-height:1;white-space:nowrap;border-top-left-radius:10px;border-top-right-radius:10px;transform:translateX(-50%);-webkit-transform:translateX(-50%);-ms-transform:translateX(-50%)}}.vksgn-navigation.is_dark,.vksgn-navigation.is_dark .demosite_message{background:#222}.vksgn-navigation,.vksgn-navigation a,.vksgn-navigation a:hover{color:#fff;text-decoration:none}.vksgn-navigation ul{list-style:none}.vksgn-navigation.is_mobile .vksgn-primary-item.open .vksgn-sub,.vksgn-navigation:not(.is_mobile) .vksgn-primary-item:hover .vksgn-sub{height:auto;visibility:visible;opacity:1}.vksgn-primary{margin:0;padding:0;text-align:center;flex-wrap:nowrap;display:-webkit-flex;display:-ms-flexbox;display:flex}.vksgn-primary-item{width:20%;text-align:center;margin:0;padding:1rem 0}.vksgn-primary-item:hover{background-color:#444}.vksgn-primary-item>a,.vksgn-primary-item>span{display:block;padding:.6rem 0;cursor:pointer}@media(min-width: 768px){.vksgn-primary-item>a,.vksgn-primary-item>span{display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center}}.vksgn-primary-item:not(:first-child)>a,.vksgn-primary-item:not(:first-child)>span{border-left:solid 1px #999}.vksgn-primary .fas,.vksgn-primary .far,.vksgn-primary .fab,.vksgn-primary .vk-icon{display:block;margin:0 auto 5px;font-size:1.8rem}@media(min-width: 768px){.vksgn-primary .fas,.vksgn-primary .far,.vksgn-primary .fab,.vksgn-primary .vk-icon{display:inline-block;margin:0 1rem 0 0}}.vksgn-primary .product .vk-icon{width:2rem;height:2rem;vertical-align:bottom;background:url("../images/vk-icon.svg") no-repeat center center/contain}.vksgn-primary .product .vk-icon.lightning{background-image:url("../images/lightning-icon.svg");width:2.4rem;height:2.4rem}@media(min-width: 768px){.vksgn-primary .product .vk-icon{width:1.8rem;height:1.8rem}.vksgn-primary .product .vk-icon.lightning{width:2.2rem;height:2.2rem}}.vksgn-primary .join .vksgn-sub-item{width:33.3333333333%}.vksgn-sub{margin:0;padding:1rem;position:absolute;left:0;bottom:100%;height:0;width:calc(100vw - (100vw - 100%));background:#454545;font-size:.9rem;opacity:0;visibility:hidden;overflow:hidden;z-index:100;transition:all .2s ease-out}@media(min-width: 768px){.vksgn-sub{padding:1.6rem;font-size:inherit}}.vksgn-sub-title a,.vksgn-sub-title span{display:block;padding-top:1rem}@media(min-width: 768px){.vksgn-sub-title a,.vksgn-sub-title span{padding-top:1.6rem}}.vksgn-sub-title a{text-decoration:underline}.vksgn-sub-title .fas,.vksgn-sub-title .far,.vksgn-sub-title .fab{display:inline-block;margin-left:1rem;font-size:1rem}.vksgn-sub-items{margin:0 0 0 1px;padding:0;text-align:center;border:solid 1px #fff;border-radius:5px;overflow:hidden;flex-wrap:wrap;display:-webkit-flex;display:-ms-flexbox;display:flex}.vksgn-sub-item{margin:0 0 -1px -1px;padding:0;position:relative;width:50%;text-align:center;border-left:solid 1px #fff;border-bottom:solid 1px #fff}.vksgn-sub-item span{display:block;font-size:.76em}.vksgn-sub-item:hover{background-color:#333}@media(min-width: 768px){.vksgn-sub-item{width:25%}}.vksgn-sub-item a{display:block;padding:1rem 0}@media(min-width: 768px){.vksgn-sub-item br{display:none;margin-right:.4rem}}.page_top_btn{bottom:90px;z-index:98}.ld-course-navigation{margin-bottom:80px}html{height:auto !important}