@font-face{font-family:InterTightVar;src:url(/learn/fonts/InterTightVariable.woff2) format("woff2");font-weight:100 900;font-style:normal;font-display:swap}@font-face{font-family:JetBrainsMonoVar;src:url(/learn/fonts/JetBrainsMonoVariable.woff2) format("woff2");font-weight:100 800;font-style:normal;font-display:swap}:root{color-scheme:dark;--paper:#08080a;--paper-raised:#111114;--paper-sunken:#050507;--ink:#f5f3ec;--ink-2:#a09a8c;--ink-3:#6b655a;--hairline:#1e1e24;--hairline-strong:#2c2c34;--accent:#f5a35a;--accent-text:#f5a35a;--accent-soft:rgba(245,163,90,0.12);--btn-bg:#c76215;--pill-bg:#f5f3ec;--pill-fg:#0a0a0c;--geo-a:#f5a35a;--geo-b:#c76215;--geo-c:#ede5d2;--geo-d:#26262e;--geo-bg:#131316;--focus-ring:rgba(245,163,90,0.55);--shadow-card:0 1px 2px rgba(0,0,0,0.4),0 8px 32px rgba(0,0,0,0.45);--font-sans:"InterTightVar",system-ui,-apple-system,"Segoe UI",sans-serif;--font-mono:"JetBrainsMonoVar",ui-monospace,"SF 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