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span{color:#9fa9af;font-size:.76rem;line-height:1.55}.site-footer a:hover{color:#fff}.loading-bar{background:linear-gradient(90deg,#e0e4e7 25%,#f3f5f6 50%,#e0e4e7 75%) 0 0/200% 100%;border-radius:3px;animation:1.3s linear infinite loading}@keyframes loading{to{background-position:-200% 0}}@media (min-width:640px){.page-container{width:min(100% - 3rem,74rem)}.learning-mode-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.learning-mode:nth-child(2n){border-left:1px solid var(--line)}.learning-mode:nth-child(2){border-top:0}.study-toolbar-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.study-mode:nth-child(2n){border-left:1px solid #e1e5e8}.study-mode:nth-child(2){border-top:0}.lesson-navigation{grid-template-columns:repeat(2,minmax(0,1fr))}.site-footer-inner{grid-template-columns:1fr auto;align-items:end}}@media (min-width:768px){.primary-nav{display:flex}.mobile-menu{display:none}.course-entry{grid-template-columns:minmax(0,1fr)}}@media (min-width:900px){.hero-grid{grid-template-columns:minmax(0,1.5fr) minmax(17rem,.5fr);align-items:end}.course-list.two-column{grid-template-columns:repeat(2,minmax(0,1fr))}.study-toolbar-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.study-mode+.study-mode{border-top:0;border-left:1px solid #e1e5e8}.lesson-content-grid{grid-template-columns:minmax(0,1fr) 15rem;align-items:start}.lesson-sidebar{position:sticky;top:5.2rem}}@media (min-width:1024px){.learning-mode-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.learning-mode+.learning-mode{border-top:0;border-left:1px solid var(--line)}}@media (max-width:639px){.lesson-row-link{grid-template-columns:2rem minmax(0,1fr)}.lesson-row-action,.brand-subtitle{display:none}}@property --tw-leading{syntax:"*";inherits:false}