.vs-header.at-top .sticky-container{background-color:transparent}.vs-header.stuck .sticky-container{background-color:#024}.vs-header{margin-bottom:-7rem;max-height:7rem;position:relative;width:100%;z-index:999}.vs-header ul li::before{content:'';display:none}.vs-header .nav-container{position:relative}.vs-header .secondary-nav{display:none}@media(min-width:1210px){.vs-header .secondary-nav{display:block}}.vs-header .secondary-nav .l0-nav{align-items:flex-end;display:flex;height:3.5rem;justify-content:flex-end;margin:0 auto;max-width:1440px;padding:0 1.5rem;width:100%}.vs-header .secondary-nav .l0-nav a{font:400 1.4rem/1.6rem 'Roboto',sans-serif;color:#fff;padding-left:4rem}.vs-header.stuck .sticky-container{height:7rem;left:0;position:fixed;top:0;width:100%;transform:translateZ(0)}.vs-header.stuck .sticky-container .primary-nav{padding-left:3rem;padding-right:3rem;width:100%}@media(min-width:1210px){.vs-header .sticky-container .primary-nav{display:flex;justify-content:space-between;margin-left:auto;margin-right:auto;padding:0;max-width:1440px}}.vs-header .primary-nav .logo-items{align-items:center;display:flex;height:7rem;justify-content:space-between;margin:0 -1.5rem;padding:0 1.5rem}@media(min-width:1210px){.vs-header .primary-nav .logo-items{flex:1 1 auto;max-width:21rem}}.vs-header .primary-nav .logo-items .vs-logo{background:url(https://get.vitalsource.com/hubfs/Website/logos/vs-logo-white.svg) no-repeat;background-size:11.8rem 2.1rem;border:0;display:block;height:2.1rem;overflow:hidden;text-indent:-9999rem;width:11.8rem}@media(min-width:1210px){.vs-header .primary-nav .logo-items .vs-logo{background-size:17.85rem 3.23rem;height:3.23rem;width:17.85rem}}.vs-header .primary-nav .logo-items .toggle-mobile-menu{cursor:pointer;display:block;height:3.4rem;width:3.4rem}@media(min-width:1210px){.vs-header .primary-nav .logo-items .toggle-mobile-menu{display:none}}.vs-header .primary-nav .logo-items .si-icon{display:inline-block;overflow:hidden}.vs-header .primary-nav .logo-items .si-icon,.vs-header .primary-nav .logo-items .si-icon svg{height:3.4rem;width:3.4rem}@media(min-width:1210px){.vs-header .primary-nav .nav-items{width:94rem}}.vs-header .menu-items{background-color:#fff;display:none;flex-direction:column;margin-left:-3rem;margin-right:-3rem;max-height:calc(100vh - 7rem);overflow-y:auto;overflow-x:hidden;padding:0;position:relative}.vs-header .menu-items.open{display:flex}@media(min-width:1210px){.vs-header .menu-items{align-items:center;background-color:transparent;display:inline-flex;flex-direction:row;height:7rem;justify-content:space-between;margin:0;max-height:none;overflow:visible}}.vs-header .menu-items .menu-item{flex-shrink:0;order:2;position:relative}@media(min-width:1210px){.vs-header .menu-items .menu-item{margin-right:.3rem}}.vs-header .menu-items .menu-item:last-child{border-bottom:1px solid #dfe4ea}.vs-header .menu-items .menu-item>a{font:400 1.6rem/2.4000000000000004rem 'Roboto Slab',serif;border-top:1px solid #dfe4ea;color:#404041;display:block;padding:2rem 1.5rem}.vs-header .menu-items .menu-item>a:hover{text-decoration:none}.vs-header .menu-items .menu-item .nav-label{font:400 1.6rem/2.4000000000000004rem 'Roboto Slab',serif;background-color:transparent;border:0;border-top:1px solid #ced2d9;color:#404041;cursor:pointer;display:block;outline:0;position:relative;padding:2rem 1.5rem;text-align:left;width:100%}@media(min-width:1210px){.vs-header .menu-items .menu-item .nav-label{font:400 1.6rem/2.4000000000000004rem 'Roboto',sans-serif;border:0;color:#fff;margin-right:2rem;padding:1rem 2rem 1rem 0;width:auto}}@media(min-width:1210px){.vs-header .menu-items .menu-item .nav-label:last-child{margin-right:0}}.vs-header .menu-items .menu-item.has-mega-menu .nav-label:before{background:url(https://get.vitalsource.com/hubfs/Website/icons/chevron.svg) no-repeat;content:'';display:block;height:1.2rem;position:absolute;right:1.5rem;top:calc(50% - .6rem);width:2rem}@media(min-width:1210px){.vs-header .menu-items .menu-item.has-mega-menu .nav-label:before{background:url(https://get.vitalsource.com/hubfs/Website/icons/chevron-white.svg) no-repeat;height:.7rem;right:0;top:1.8rem;width:1.2rem}}.vs-header .menu-items .menu-item.has-mega-menu.open .nav-label{background-color:#f8f8f8}@media(min-width:1210px){.vs-header .menu-items .menu-item.has-mega-menu.open .nav-label{background-color:transparent;position:relative}}.vs-header .menu-items .menu-item.has-mega-menu.open .nav-label:before{transform:rotate(180deg)}@media(min-width:1210px){.vs-header .menu-items .menu-item.has-mega-menu.open .nav-label:before{transform:none}}@media(min-width:1210px){.vs-header .menu-items .menu-item.has-mega-menu.open.active .nav-label:after{background-color:#ca500f;content:'';display:block;height:.5rem;position:absolute;transform:scaleX(1);transition:none;visibility:visible;width:100%}}@media(min-width:1210px){.vs-header .menu-items .menu-item.has-mega-menu .nav-label:after{background-color:#ca500f;content:'';display:block;height:.5rem;position:absolute;transform:scaleX(0);transition:all .3s ease-in-out 0s;visibility:hidden;width:100%}.vs-header .menu-items .menu-item.has-mega-menu .nav-label:hover:after,.vs-header .menu-items .menu-item.has-mega-menu .nav-label:focus:after,.vs-header .menu-items .menu-item.has-mega-menu .nav-label[aria-expanded='true']:after,.vs-header .menu-items .menu-item.has-mega-menu.active-tab .nav-label:after{visibility:visible;transform:scaleX(1)}}@media(min-width:1210px) and (prefers-reduced-motion:reduce){.vs-header .menu-items .menu-item.has-mega-menu .nav-label:after{transition:all 0s}}.vs-header .menu-items .menu-item.has-mega-menu .mega-menu{display:none}.vs-header .menu-items .menu-item.has-mega-menu.open .mega-menu{display:block}@media(min-width:1210px){.vs-header .menu-items .menu-item.has-mega-menu.open .mega-menu{display:none}}.vs-header .menu-items .menu-item.has-mega-menu.open .featured-image,.vs-header .menu-items .menu-item.has-mega-menu.open .featured-hdr,.vs-header .menu-items .menu-item.has-mega-menu.open .featured-desc{display:none}.vs-header .menu-items .menu-item .mega-menu .featured-cta{display:block}.vs-header .menu-items .menu-item .mega-menu .featured-cta a{font:400 1.6rem/2.4000000000000004rem 'Roboto',sans-serif;background-color:#f8f8f8;border-bottom:0;border-left:0;border-right:0;border-top:1px solid #dfe4ea;color:#404041;display:block;padding:2rem 1.5rem 2rem 3.5rem;text-align:left;text-transform:none}.vs-header .menu-items .mega-menu .mega-menu-column .nav-links{margin:0;padding:0}.vs-header .menu-items .mega-menu .mega-menu-column .link-text>div{display:inline}.vs-header .menu-items .mega-menu .mega-menu-column .link-subhead{display:none}.vs-header .menu-items .menu-item.has-mega-menu .mega-menu .mega-menu-column .vertical-accent-hover{border-left:0}@media(min-width:1210px){.vs-header .menu-items .menu-item.has-mega-menu .mega-menu .mega-menu-column .vertical-accent-hover:hover{border-left:.5rem solid #fff}}.vs-header .menu-items .menu-item.has-mega-menu .mega-menu .mega-menu-column a{font:400 1.6rem/2.4000000000000004rem 'Roboto',sans-serif;background-color:#f8f8f8;border-top:1px solid #dfe4ea;color:#404041;display:block;padding:2rem 1.5rem 2rem 3.5rem}.vs-header .menu-items .menu-item.has-mega-menu .mega-menu .mega-menu-column a:hover{text-decoration:none}.vs-header .menu-items .menu-item .mega-menu .nav-hdr{display:none}.vs-header .menu-items .menu-item.cta-container .btn{display:block}.vs-header .menu-items .menu-item.cta-container .btn a{font:400 1.6rem/2.4000000000000004rem 'Roboto Slab',serif;background-color:#fff;border-top:1px solid #dfe4ea;color:#ca500f;display:block;padding:2rem 1.5rem;text-align:left;text-transform:none;width:100%}@media(min-width:1210px){.vs-header .menu-items .menu-item.cta-container .btn a{font:500 1.4rem/1.4rem 'Roboto',sans-serif;background-color:#ca500f;border-top:0;color:#fff;display:inline-block;padding:1.1rem 2.4rem;text-align:center;text-transform:uppercase;width:auto}}@media(min-width:1210px){.vs-header .menu-items .menu-item.cta-container .btn a:hover{background-color:#f68522}}.vs-header .menu-items .menu-item.search-container{color:#71747a;order:1;padding:1.5rem;position:relative}@media(min-width:1210px){.vs-header .menu-items .menu-item.search-container{order:2;padding:0 .5rem;width:4rem}}.vs-header .menu-items .menu-item.search-container .search-icon{background:url(https://get.vitalsource.com/hubfs/Website/icons/icon-search-gray.svg) no-repeat center center;background-size:1.8rem;border:0;cursor:pointer;display:inline-block;height:2.4rem;position:absolute;right:2.4rem;text-indent:-9999rem;top:2.3rem;width:2.4rem}@media(min-width:1210px){.vs-header .menu-items .menu-item.search-container .search-icon{background:url(https://get.vitalsource.com/hubfs/Website/icons/icon-search.svg) no-repeat center center;background-position:center center;background-size:2rem;height:3rem;padding:1rem;right:0;top:.5rem;width:3rem}.vs-header .menu-items .menu-item.search-container .search-icon:focus{outline-color:#005fcc;outline-offset:1px;outline-width:1px}}.vs-header .menu-items .menu-item.search-container input[type=text]{font:400 1.6rem/2.4000000000000004rem 'Roboto',sans-serif;background-color:#f8f8f8;border:1px solid #dfe4ea;border-radius:.4rem;height:4rem;padding-right:3.4rem}@media(min-width:1210px){.vs-header .menu-items .menu-item.search-container input[type=text]{border:0;padding:0;width:0}}@media(min-width:1210px){.vs-header .search-spacer.search-menu-open{flex-shrink:0;height:4rem;order:2;position:relative;width:4rem}.vs-header .menu-items .menu-item.search-container.search-menu-open{margin-left:-1.5rem;position:absolute;width:calc(100% + 3rem)}.vs-header .menu-items .menu-item.search-container.search-menu-open .search-icon{background-image:url(https://get.vitalsource.com/hubfs/Website/icons/icon-search-gray.svg);right:1.5rem;top:-1.5rem;z-index:11}.vs-header .menu-items .menu-item.search-container.search-menu-open input[type=text]{border:1px solid #ced2d9;border-radius:.4rem;height:5rem;padding:2rem 6rem 2rem 2rem;position:absolute;right:0;top:-2.5rem;transition:width .6s;width:100%;z-index:10}@media(prefers-reduced-motion:reduce){.vs-header .menu-items .menu-item.search-container.search-menu-open input[type=text]{transition:width 0s}}}.vs-header .mega-menu-stage.hide{display:none}@media(min-width:1210px){.vs-header .mega-menu-stage{background-color:#fff;box-shadow:0 2px 7px 1px rgba(0,0,0,0.1);display:flex;width:100%}.vs-header .mega-menu-stage .nav-hdr{font:700 1.3rem/2.1rem 'Roboto Slab',serif;display:block;color:#ca500f;text-transform:uppercase}.vs-header .mega-menu-stage .featured-column{background-color:rgba(113,116,122,0.1);min-width:25rem;padding:2.4rem 2.4rem 4.5rem 2.4rem;text-align:center;width:25rem}.vs-header .mega-menu-stage .featured-column .featured-image{align-items:center;background-color:#024;border-radius:13.5rem;display:flex;height:13.5rem;justify-content:center;margin:0 auto 2.4rem;width:13.5rem}.vs-header .mega-menu-stage .featured-column .featured-image img{max-height:8rem;max-width:8rem}.vs-header .mega-menu-stage .featured-column .featured-hdr{margin-bottom:1.5rem}.vs-header .mega-menu-stage .featured-column .featured-desc{font:400 1.4rem/2.2rem 'Roboto',sans-serif;color:#404041;margin-bottom:1.5rem}.vs-header .mega-menu-stage .mega-menu-column{flex-grow:1;max-width:69rem;min-width:23rem;padding:2.4rem .75rem}.vs-header .mega-menu-stage .mega-menu-column:nth-child(2){padding-left:1.5rem}.vs-header .mega-menu-stage .mega-menu-column:last-child{padding-right:1.5rem}.vs-header .mega-menu-stage .mega-menu-column .column-hdr{border-bottom:1px solid #dfe4ea;padding-bottom:1rem}.vs-header .mega-menu-stage .mega-menu-column .nav-links{display:flex;flex-wrap:wrap;margin:0;padding:0}.vs-header .mega-menu-stage .mega-menu-column .nav-links li{margin-bottom:1.5rem}.vs-header .mega-menu-stage .mega-menu-column .nav-links.subcolumn-2 li{margin-bottom:2rem;width:50%}.vs-header .mega-menu-stage .mega-menu-column .nav-links.subcolumn-3 li{margin-bottom:2rem;width:33%}.vs-header .mega-menu-stage .vertical-accent-hover.new-window-link.gray:after{display:none}.vs-header .mega-menu-stage .vertical-accent-hover.new-window-link.gray .link-text:after{content:"";background:url(https://get.vitalsource.com/hubfs/Website/icons/gray-external-link.svg);height:10px;margin:.5rem 0 0 1rem;position:absolute;width:10px}.vs-header .mega-menu-stage .mega-menu-column .link-text{font:400 1.6rem/2rem 'Roboto',sans-serif;color:#404041;display:block}.vs-header .mega-menu-stage .mega-menu-column .link-subhead{font:400 1.4rem/2.2rem 'Roboto',sans-serif;color:#71747a;display:block}.vs-header .mega-menu-stage .mega-menu-column .link-text>div,.vs-header .mega-menu-stage .mega-menu-column .link-subhead>div{display:inline}}