[data-skin=slack]{--skin-bg:#ffffff;--skin-surface:#ffffff;--skin-surface-2:#f8f8f8;--skin-border:#dddddd;--skin-text:#1d1c1d;--skin-muted:#616061;--skin-accent:#611f69;--skin-accent-text:#ffffff;--skin-ring:rgba(97,31,105,0.35);--skin-radius:8px;--skin-font:"Lato",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--skin-mono:"Monaco",ui-monospace,"SF Mono",Menlo,Consolas,monospace;--slack-rail:#2c032e;--slack-side:#3f0e40;--slack-side-hover:#4a154b;--slack-side-text:#cfc3cf;--slack-active:#1164a3;--slack-online:#2bac76}[data-skin=slack] .lesson-prose h2{display:flex;align-items:center;gap:.75rem}[data-skin=slack] .lesson-prose h2:after{content:"";flex:1 1 2rem;height:1px;background:var(--skin-border)}[data-skin=slack] .lesson-prose pre{border-radius:6px}body:has([data-skin=slack]){background:#ffffff}