:root{--brand-navy:#06142e;--brand-navy-raised:#10264a;--brand-magenta:#cf2f78;--brand-magenta-strong:#a91f5d;--brand-magenta-soft:#fbe8f1;--brand-blue:#51afe0;--brand-blue-strong:#1d719e;--brand-blue-soft:#e7f5fc;--brand-cobalt:#286db2;--brand-cobalt-strong:#174f88;--brand-cobalt-soft:#e8f0fa;--brand-gold:#f3bd46;--brand-gold-strong:#94620a;--brand-gold-soft:#fff2cf;--brand-cream:#fbf4e6;--surface:#f7f4ee;--panel:#fffdf9;--panel-strong:#f2eee6;--text:#0a1730;--text-2:#596476;--text-3:#7c8798;--border:#e3ddd2;--accent:var(--brand-blue);--accent-strong:var(--brand-blue-strong);--accent-soft:var(--brand-blue-soft);--action:var(--brand-gold);--action-strong:#dda42d;--action-text:var(--brand-navy);--success:#32a071;--danger:#c2605b;--shadow:0 20px 60px 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var(--course-accent);background:var(--surface);color:var(--text);white-space:pre-wrap;border-radius:4px;padding:24px 26px;font-family:Georgia,Times New Roman,serif;font-size:19px;line-height:1.8}.exercise-discovery-summary{border-top:1px solid color-mix(in srgb, var(--course-accent) 34%, var(--border));padding:17px 0 0}.exercise-discovery-summary>span{color:var(--course-accent-strong);letter-spacing:.1em;text-transform:uppercase;font-size:12px;font-weight:800}.exercise-discovery-summary p{color:var(--text-2);margin:7px 0 0;font-size:17px;line-height:1.6}.exercise-brief-collapsed{border-color:var(--border);background:var(--surface)}.exercise-brief-collapsed summary{color:var(--text-2)}.exercise-reflection{border-top:0;border-bottom:1px solid var(--border);background:var(--panel)}.exercise-reflection>textarea{border-color:color-mix(in srgb, var(--course-accent) 46%, var(--border));background:var(--panel)}.exercise-stage-intro{border:0;margin:0;padding:0}.exercise-stage-intro h3{margin:0 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