.learn-shell{--learn-shell-top:3.5rem;--learn-sidebar-width:5.5rem;--learn-rail-width:18.75rem;--learn-bottom-nav-height:4.5rem;background:hsl(var(--background));min-height:100vh}.learn-shell__grid{min-height:calc(100vh - var(--learn-shell-top));display:flex}.learn-shell__main{flex:1;min-width:0}.learn-shell__rail{width:var(--learn-rail-width);flex-shrink:0}.learn-shell__stats{border-bottom:1px solid hsl(var(--border));background:hsl(var(--card) / .6)}@media (max-width:1023px){.learn-shell__rail{display:none}}.learn-shell__bottom-spacer{padding-bottom:calc(4.5rem + env(safe-area-inset-bottom,0px))}@media (min-width:1024px){.learn-shell__bottom-spacer{padding-bottom:1.5rem}}