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a.toggle-location-modal{display:inline-block;padding-left:4rem;position:relative;top:.1rem}.vs-header .toggle-location-modal .toggle-location-modal__mobile-icon{position:relative;top:-.3rem}.vs-header.stuck .sticky-container{left:0;position:fixed;top:0;transform:translateZ(0);width:100%}.vs-header.stuck .sticky-container .primary-nav{padding-left:1.5rem;padding-right:1.5rem;width:100%}@media (min-width:1210px){.vs-header .sticky-container .primary-nav{display:flex;justify-content:space-between;margin-left:auto;margin-right:auto;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 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.menu-items{background-color:#fff;display:none;flex-direction:column;margin-left:-3rem;margin-right:-3rem;max-height:calc(100vh - 7rem);overflow-x:hidden;overflow-y:auto;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{border-top:1px solid #dfe4ea;color:#404041;display:block;font:400 1.6rem/2.4000000000000004rem Roboto Slab,serif;padding:2rem 1.5rem}.vs-header .menu-items .menu-item>a:hover{text-decoration:none}.vs-header .menu-items .menu-item .nav-label{background-color:transparent;border:none;border-top:1px solid #ced2d9;color:#404041;cursor:pointer;display:block;font:400 1.6rem/2.4000000000000004rem Roboto Slab,serif;outline:0;padding:2rem 1.5rem;position:relative;text-align:left;width:100%}@media (min-width:1210px){.vs-header .menu-items .menu-item .nav-label{border:none;color:#fff;font:400 1.6rem/2.4000000000000004rem Roboto,sans-serif;margin-right:2rem;padding:1rem 2rem 1rem 0;width:auto}.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) 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.featured-image{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{background-color:#f8f8f8;border:none;border-top:1px solid #dfe4ea;color:#404041;display:block;font:400 1.6rem/2.4000000000000004rem Roboto,sans-serif;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{background-color:#f8f8f8;border-top:1px solid #dfe4ea;color:#404041;display:block;font:400 1.6rem/2.4000000000000004rem Roboto,sans-serif;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{background-color:#fff;border-top:1px solid #dfe4ea;color:#ca500f;display:block;font:400 1.6rem/2.4000000000000004rem Roboto Slab,serif;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{background-color:#ca500f;border-top:none;color:#fff;display:inline-block;font:500 1.4rem/1.4rem Roboto,sans-serif;padding:1.1rem 2.4rem;text-align:center;text-transform:uppercase;width:auto}.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 50%;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-gray.svg) no-repeat 50%;background-position:50%;background-size:2rem;height:3rem;padding:1rem;right:0;top:.5rem;width:3rem}.vs-header .menu-items .menu-item.search-container 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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{background:url(https://get.vitalsource.com/hubfs/Website/icons/gray-external-link.svg);content:"";height:10px;margin:.5rem 0 0 1rem;position:absolute;width:10px}.vs-header .mega-menu-stage .mega-menu-column .link-text{color:#404041;display:block;font:400 1.6rem/2rem Roboto,sans-serif}.vs-header .mega-menu-stage .mega-menu-column .link-subhead{color:#71747a;display:block;font:400 1.4rem/2.2rem Roboto,sans-serif}.vs-header .mega-menu-stage .mega-menu-column .link-subhead>div,.vs-header .mega-menu-stage .mega-menu-column .link-text>div{display:inline}}.vs-header .mega-menu-stage .mega-menu-column .new-badge{background-color:#00a7db;border-radius:1.2rem;color:#fff;font-size:1.2rem;font-weight:700;padding:.4rem 1rem;text-transform:uppercase}.vs-header .nav-container{max-width:none;padding-left:0;padding-right:0}.vs-header .secondary-nav{margin:auto;max-width:1400px}.vs-header nav.navTopLevel{display:none}.vs-header .openedM ul{display:block;visibility:visible}.vs-header .closedM ul,.vs-header ul.closedM{display:none;visibility:hidden}.vs-header ul.openedM{display:block;visibility:visible}.vs-header .hs-menu-wrapper.hs-menu-flow-horizontal>ul li button{-webkit-appearance:button;background:none;border:none;cursor:pointer;display:inline-block;max-width:100%!important;max-width:140px;overflow:inherit!important;overflow:hidden;padding:10px 20px;text-decoration:none;text-overflow:inherit!important;text-overflow:ellipsis;white-space:inherit!important;white-space:nowrap;width:auto!important}.vs-header .hs-menu-wrapper.hs-menu-flow-horizontal>ul li a,.vs-header .hs-menu-wrapper.hs-menu-flow-horizontal>ul li button{color:#fff;font:400 1.8rem/2.4000000000000004rem Roboto,sans-serif}@media (min-width:1210px){.vs-header .hs-menu-wrapper.hs-menu-flow-horizontal>ul li button:before{background:url(https://get.vitalsource.com/hubfs/2021_Research/Home/chevron-white.svg) no-repeat;content:"";display:block;height:.7rem;position:absolute;right:2px;top:1.8rem;width:1.2rem}.vs-header .hs-menu-wrapper.hs-menu-flow-horizontal>ul li.hs-menu-item{position:relative}}.navTopLevel.openedM a{display:block;text-align:left}.vs-header #mobilemenuItems a .orange-txt{color:#ca500f}.vs-header #mobilemenuItems a:focus,.vs-header #mobilemenuItems button:focus{border:1px solid #000!important}.vs-header .sr-only{clip:rect(0 0 0 0);clip-path:inset(50%);height:1px;overflow:hidden;position:absolute;white-space:nowrap;width:1px}.vs-header .sticky-container .primary-nav{display:flex;justify-content:space-between;margin-left:auto;margin-right:auto;max-width:1440px;padding:0 1.5rem}.vs-header .vs-logo img{max-width:175px}.vs-header .sticky-container{left:0;top:0;width:100%;z-index:9999}.vs-header .menu-item .search-form-mobile{padding:10px}.vs-header .menu-item.search-container input[type=text]{background-color:#f8f8f8;border:1px solid #dfe4ea;border-radius:.4rem;font:400 1.6rem/2.4000000000000004rem Roboto,sans-serif;height:4rem;padding-right:3.4rem}.vs-header #mobilemenuItems button#menuButton{padding:4px 8px}.vs-header #mobilemenuItems .submenubtn{position:relative}.vs-header .submenubtn:before{background:url(https://get.vitalsource.com/hubfs/Website/icons/chevron.svg) no-repeat;background-position:100%;background-size:20px 12px;content:"";height:20px;position:absolute;right:20px;text-align:right;transition:all .5s;width:20px;z-index:1}.vs-header #mobilemenuItems button#menuButton{height:3.4rem;width:3.4rem}.vs-header nav#mainNavMobile.opened{background:#fff;max-height:100vh;overflow-y:scroll}.vs-header nav#mainNavMobile.closed{max-height:none;overflow-y:hidden}.vs-header button.si-icon.si-icon-hamburger-cross{background:transparent;cursor:pointer;display:inline-block;float:right}.vs-header #mainNavMobile.opened .logo-items{background:#024}.vs-header #mainNavMobile .logo-items{align-items:center;display:flex;height:7rem;justify-content:space-between;padding:1.5rem}.vs-header #mainNavMobile .logo-items .logo{display:block;height:5rem}.vs-header #mainNavMobile .logo-items .vs-logo{display:block}.vs-header button.si-icon.si-icon-hamburger-cross svg{height:3.4rem;position:relative;top:5px;width:3.4rem}.vs-header nav.navTopLevel{display:none!important}.vs-header .navTopLevel ul{list-style:none;margin-bottom:0;padding-left:0}.vs-header .navTopLevel ul li{margin-left:0}.vs-header .opened ul{display:block}.vs-header .closed ul,.vs-header ul.closed{display:none}.vs-header ul.open{display:block}.vs-header #mobilemenuItems .submenubtn,.vs-header #mobilemenuItems a{background-color:transparent;border:0;border-top:1px solid #ced2d9;color:#404041;cursor:pointer;display:block;font:400 1.6rem/2.4000000000000004rem Roboto Slab,serif;outline:0;padding:2rem 1.5rem;position:relative;text-align:left}.vs-header #mobilemenuItems>li:last-child a{border-bottom:1px solid #ced2d9}.vs-header #mobilemenuItems .submenu a{background-color:#f8f8f8;padding-left:20px}.vs-header .navTopLevel.opened a{display:block;text-align:left}.vs-header .navTopLevel.opened a:focus,.vs-header .navTopLevel.opened button:focus{color:#fff;display:block;text-align:left}.vs-header #mobilemenuItems li:before{display:none}.vs-header .navTopLevel button{background-color:#fff;border:none;display:block;padding:0}.vs-header .submenubtn{display:inherit;font-weight:400;line-height:1.8;text-align:left;width:100%}.vs-header nav.navTopLevel a{color:#243642;font-size:24px;font-weight:400;line-height:1.8}.vs-header nav.navTopLevel a:hover{color:#fff}.vs-header ul.submenu li a{font-size:18px;line-height:2;padding-left:18px}.vs-header span.comingsoon{background:#0075e3;border-radius:2px;color:#fff;font-size:12px;font-weight:600;max-width:100%;padding:3px 7px;position:relative;text-align:center;top:-6px;width:auto;z-index:1}@media (max-width:1210px){.vs-header nav.navTopLevel{display:block!important}.vs-header .primary-nav{display:none!important}}@media (max-width:480px){.vs-header button#menuButton{right:10px;top:19px}}@media (max-width:350px){.vs-header button#menuButton{top:14px}}@media (max-width:1210px){.vs-header nav.navTopLevel{display:block}}.show-promo-banner .vs-promo-banner{display:flex}.vs-promo-banner{align-items:center;background:#bfe9f6;color:#024;display:none;min-height:6rem;padding:1.5rem 0;text-align:center}.vs-promo-banner .container{align-items:center;display:flex}.vs-promo-banner .promo-banner__content{flex:1 1 auto;padding-right:2rem}.vs-promo-banner .promo-banner__close-btn{background:url(https://get.vitalsource.com/hubfs/Website/icons/close.svg) no-repeat 50%;border:0;cursor:pointer;flex:0 0 auto;height:2rem;text-indent:-9999rem;width:2.1rem}