[data-lesson-nav-anchor]{scroll-margin-top:112px}.lesson-reading-shell{min-width:0;position:relative}.lesson-navigation{width:min(100% - 48px,600px);color:var(--foreground);box-shadow:none;font-family:var(--font-sans);background:0 0;border:0;margin:16px auto 28px;scroll-margin-top:88px}.lesson-navigation-toggle{width:100%;font:inherit;text-align:left;cursor:pointer;background:0 0;align-items:center;gap:10px;padding:12px 4px 12px 44px;font-size:12px;display:flex}.lesson-navigation-toggle>span:first-of-type{letter-spacing:.01em;font-weight:600}.lesson-navigation-toggle>svg{color:var(--muted-foreground);transition:transform .2s}.lesson-navigation-position{color:var(--muted-foreground);font-variant-numeric:tabular-nums;margin-left:auto;font-size:11px}.lesson-navigation[data-expanded=true] .lesson-navigation-toggle>svg:last-child{transform:rotate(180deg)}.lesson-navigation-panel{padding:5px 0 12px}.lesson-navigation-panel[hidden]{display:none}.lesson-navigation-caption{color:var(--muted-foreground);max-width:24ch;margin:0 0 18px 44px;font-size:10.5px;line-height:1.8}.lesson-navigation-list{overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--border) transparent;max-height:min(60dvh,600px);overflow-y:auto}.lesson-navigation-list ol{min-height:1px;margin:0;padding:0;list-style:none;position:relative}.lesson-navigation-lines{width:32px;color:var(--accent-gold);pointer-events:none;position:absolute;inset:0 auto 0 0;overflow:hidden}.lesson-sequence-line{stroke:color-mix(in srgb, var(--muted-foreground) 25%, transparent)}.lesson-sequence-line[data-passed=true]{stroke:color-mix(in srgb, var(--accent-gold) 65%, transparent)}.lesson-navigation-node{margin:0;padding:0}.lesson-navigation-node a{min-height:42px;color:var(--muted-foreground);overflow-wrap:anywhere;align-items:center;padding:9px 6px 9px 44px;font-size:12.5px;line-height:1.65;text-decoration:none;transition:color .16s;display:flex;position:relative}.lesson-navigation-node[data-level="1"] a{padding-left:52px;font-size:12px}.lesson-navigation-dot{opacity:.5;background:currentColor;border-radius:50%;width:5px;height:5px;transition:transform .16s,opacity .16s;position:absolute;top:50%;left:24px;transform:translate(-50%,-50%)}.lesson-navigation-node[data-passed=true] .lesson-navigation-dot{background:var(--accent-gold);opacity:.65}.lesson-navigation-node a:hover{color:var(--foreground)}.lesson-navigation-node a:hover .lesson-navigation-dot{opacity:1;transform:translate(-50%,-50%)scale(1.3)}.lesson-navigation-node a[aria-current=location]{color:var(--foreground);font-weight:600}.lesson-navigation-node a[aria-current=location] .lesson-navigation-dot{opacity:1;background:var(--accent-gold);width:9px;height:9px}.lesson-navigation-node[data-related=true] a{color:var(--foreground);text-decoration:underline;-webkit-text-decoration-color:color-mix(in srgb, var(--accent-gold) 65%, transparent);text-decoration-color:color-mix(in srgb, var(--accent-gold) 65%, transparent);text-underline-offset:4px;text-decoration-thickness:1px}.lesson-reference-line{stroke-dasharray:1;animation:.65s ease-out both lesson-reference-trace}.lesson-reference-summary{margin:24px 4px 0 44px;font-size:11px;line-height:1.75}.lesson-reference-summary strong{color:var(--muted-foreground);font-weight:500}.lesson-reference-summary a{color:var(--foreground);margin-top:9px;text-decoration:none;display:block}.lesson-reference-summary a>span{text-decoration:underline;-webkit-text-decoration-color:var(--accent-gold);text-decoration-color:var(--accent-gold);text-underline-offset:4px}.lesson-reference-summary small{color:var(--muted-foreground);margin-top:3px;font-size:10.5px;display:block}.lesson-reference-help{background:0 0;margin:20px 0 0 44px;padding:0 22px 0 0;font-size:11px;line-height:1.8;position:relative}.lesson-reference-help strong{font-weight:550}.lesson-reference-help p{color:var(--muted-foreground);margin:5px 0 0}.lesson-reference-help button{width:24px;height:28px;color:var(--muted-foreground);place-items:center;display:grid;position:absolute;top:-5px;right:-4px}.lesson-navigation-launcher{z-index:45;right:20px;bottom:calc(20px + env(safe-area-inset-bottom));background:var(--foreground);min-height:44px;color:var(--background);font:11px var(--font-sans);font-variant-numeric:tabular-nums;cursor:pointer;border:0;border-radius:999px;align-items:center;gap:10px;padding:0 15px;display:flex;position:fixed}.lesson-navigation-launcher:hover{opacity:.86}.lesson-navigation :is(a,button):focus-visible{outline:2px solid var(--accent-gold);outline-offset:3px}.lesson-navigation-launcher:focus-visible{outline:2px solid var(--accent-gold);outline-offset:3px}html[data-client=true]:not([data-offline=true]) .lesson-navigation-launcher{bottom:calc(82px + env(safe-area-inset-bottom))}@keyframes lesson-reference-trace{0%{stroke-dashoffset:1px}to{stroke-dashoffset:0}}@media (min-width:1440px){.lesson-reading-shell{padding-right:282px}.lesson-reading-shell>:not(.lesson-navigation){width:100%;max-width:1120px;margin-inline:auto}[data-lesson-intro][data-lesson-intro]{max-width:52.5rem}.lesson-navigation{z-index:35;width:246px;translate:0 var(--lesson-navigation-offset,0px);margin:0;position:fixed;top:96px;right:calc(24px + max(0px,50vw - 701px))}.lesson-navigation-panel{overscroll-behavior:contain;scrollbar-width:thin;max-height:calc(100dvh - 175px);overflow-y:auto}.lesson-navigation-list{max-height:min(58dvh,650px)}.lesson-navigation[data-references=true] .lesson-navigation-list{max-height:clamp(120px,100dvh - 360px,560px)}.lesson-navigation[data-help=true] .lesson-navigation-list{max-height:clamp(120px,100dvh - 500px,460px)}}@media (max-width:600px){.lesson-navigation{width:calc(100% - 32px);margin:4px auto 20px}.lesson-navigation-toggle{min-height:44px}.lesson-navigation-caption{max-width:none}.lesson-navigation-node a{min-height:44px;font-size:13px}.lesson-navigation-node[data-level="1"] a{font-size:12.5px}.lesson-navigation-launcher{right:16px}}@media (max-width:760px){.lesson-navigation-mobile-launcher{background:color-mix(in srgb, var(--background) 95%, transparent);min-width:44px;min-height:68px;color:var(--foreground);border-radius:14px 0 0 14px;flex-direction:column;justify-content:center;gap:5px;padding:10px 8px;font-size:10px;top:42%;bottom:auto;right:0;box-shadow:-2px 2px 16px #00000014}html[data-client=true]:not([data-offline=true]) .lesson-navigation-mobile-launcher{bottom:auto}.lesson-navigation-mobile-sheet{width:min(340px,100% - 36px);max-width:none;height:100dvh;max-height:none;padding:max(24px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) 0;color:var(--foreground);background:0 0;border:0;margin:0;position:fixed;inset:0 0 0 auto;overflow:hidden}.lesson-navigation-mobile-sheet::backdrop{background:color-mix(in srgb, var(--background) 96%, transparent);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.lesson-navigation-mobile-sheet[open]{display:flex}.lesson-navigation-mobile-sheet .lesson-navigation{flex-direction:column;width:100%;min-height:0;margin:0;display:flex}.lesson-navigation-mobile-sheet .lesson-navigation-toggle{flex:none;min-height:52px;padding-left:44px;font-size:14px}.lesson-navigation-mobile-sheet .lesson-navigation-panel{overscroll-behavior:contain;scrollbar-width:thin;min-height:0;padding-top:10px;overflow-y:auto}.lesson-navigation-mobile-sheet .lesson-navigation-caption{max-width:none;margin-bottom:22px;font-size:11px}.lesson-navigation-mobile-sheet .lesson-navigation-list{max-height:none;overflow:visible}.lesson-navigation-mobile-sheet .lesson-navigation-node a{min-height:48px;padding-top:12px;padding-bottom:12px;font-size:14px}.lesson-navigation-mobile-sheet .lesson-navigation-node[data-level="1"] a{font-size:13px}.lesson-navigation-mobile-sheet .lesson-navigation-position{font-size:12px}}@media (prefers-reduced-motion:reduce){.lesson-reference-line{animation:none}.lesson-navigation-toggle>svg,.lesson-navigation-node a,.lesson-navigation-dot{transition:none}}