.course-layout{display:block;min-height:100vh}.course-navigation{display:none}.course-content{width:100%;padding:2rem;overflow-y:auto}.course-nav-item{min-height:44px;padding:.75rem 1rem;display:flex;align-items:center;gap:.75rem;border-radius:8px;transition:all .15s ease;background:transparent;border:none;cursor:pointer;color:color-mix(in srgb,var(--foreground) 60%,transparent)}.course-nav-item:hover{background:color-mix(in srgb,var(--foreground) 4%,transparent);color:var(--foreground)}.course-nav-button{min-height:40px;min-width:40px;padding:.625rem;border-radius:6px;display:flex;align-items:center;justify-content:center;transition:all .15s ease;background:transparent;border:none;cursor:pointer}.course-nav-button:hover{background:color-mix(in srgb,var(--foreground) 4%,transparent)}.mobile-menu-toggle{display:none!important}.course-content-renderer{max-width:100%;padding:0}.course-content-prose{max-width:800px;font-size:1rem;line-height:1.7;color:color-mix(in srgb,var(--foreground) 80%,transparent)}.course-content-prose h1{font-size:1.75rem;line-height:1.2;margin-bottom:1.25rem;font-weight:700;color:var(--foreground)}.course-content-prose h2{font-size:1.375rem;line-height:1.3;margin-top:2rem;margin-bottom:.75rem;font-weight:600;color:var(--foreground)}.course-content-prose h3{font-size:1.125rem;line-height:1.4;margin-top:1.5rem;margin-bottom:.5rem;font-weight:600;color:var(--foreground)}.course-content-prose p{margin-bottom:1rem}.course-content-prose img{max-width:100%;height:auto}.course-content-prose img,.course-content-prose pre{border-radius:8px;margin:1.25rem 0;border:1px solid var(--course-glass-border)}.course-content-prose pre{overflow-x:auto;padding:1rem;background:color-mix(in srgb,var(--foreground) 3%,transparent);font-size:.85rem}.course-content-prose code{font-size:.85rem;padding:.15rem .4rem;border-radius:4px;background:color-mix(in srgb,var(--foreground) 5%,transparent);color:var(--foreground);font-family:JetBrains Mono,Fira Code,monospace}.course-content-prose pre code{background:transparent;padding:0}.course-content-prose ol,.course-content-prose ul{padding-left:1.25rem;margin-bottom:1rem}.course-content-prose li{margin-bottom:.375rem}.course-content-prose table{width:100%;border-collapse:collapse;margin:1.25rem 0;font-size:.875rem}.course-content-prose td,.course-content-prose th{padding:.625rem .875rem;border:1px solid var(--course-glass-border);text-align:left}.course-content-prose th{background:color-mix(in srgb,var(--foreground) 3%,transparent);color:var(--foreground);font-weight:600}.course-content-prose blockquote{border-left:3px solid var(--course-glass-border);padding-left:1rem;margin:1.25rem 0;color:color-mix(in srgb,var(--foreground) 50%,transparent);font-style:italic}.progress-ring{width:60px;height:60px}.progress-linear{height:6px;border-radius:3px;overflow:hidden;background:color-mix(in srgb,var(--foreground) 6%,transparent)}.progress-linear-fill{height:100%;background:var(--foreground);border-radius:3px;transition:width .3s ease}.course-nav-buttons{display:flex;gap:.75rem;padding:1.25rem 0;border-top:1px solid var(--course-glass-border);margin-top:2rem}.course-nav-button-primary{padding:.625rem 1.25rem;border-radius:6px;background:color-mix(in srgb,var(--foreground) 8%,transparent);color:var(--foreground);font-weight:500;font-size:.875rem;border:1px solid var(--course-glass-border);cursor:pointer;transition:all .15s ease}.course-nav-button-primary:hover{background:color-mix(in srgb,var(--foreground) 12%,transparent)}.course-nav-button-secondary{padding:.625rem 1.25rem;border-radius:6px;background:transparent;color:color-mix(in srgb,var(--foreground) 60%,transparent);font-weight:500;font-size:.875rem;border:1px solid transparent;cursor:pointer;transition:all .15s ease}.course-nav-button-secondary:hover{color:var(--foreground);background:color-mix(in srgb,var(--foreground) 4%,transparent)}@media (min-width:768px){.course-content{padding:2rem}.course-content-prose{font-size:1.0625rem}.course-content-prose h1{font-size:2rem}.course-content-prose h2{font-size:1.5rem}.course-content-prose h3{font-size:1.25rem}.progress-ring{width:80px;height:80px}}@media (min-width:1024px){.course-content{padding:2.5rem}}@media (prefers-reduced-motion:reduce){.course-nav-button,.course-nav-button-primary,.course-nav-button-secondary,.course-nav-item,.progress-linear-fill{transition:none}}.course-nav-button-primary:focus,.course-nav-button-secondary:focus,.course-nav-button:focus,.course-nav-item:focus{outline:2px solid var(--foreground);outline-offset:2px}.course-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:250px;gap:.75rem}.course-loading-spinner{width:28px;height:28px;border:2px solid var(--course-glass-border);border-top-color:var(--foreground);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.course-error{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:250px;padding:2rem;text-align:center}.course-error-icon{width:48px;height:48px;color:#ef4444;margin-bottom:1rem}.hide-mobile{display:none}.show-mobile{display:block}@media (min-width:768px){.hide-mobile{display:block}.show-mobile{display:none}}@media print{.course-nav-buttons{display:none}.course-content{padding:0}.course-content-prose{font-size:11pt;line-height:1.5;color:black}.course-content-prose h1,.course-content-prose h2,.course-content-prose h3{color:black}}