:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--ink:#16313b;--ink-2:#284650;--muted:#627982;--surface:#fff;--surface-2:#f4f8f7;--surface-3:#eaf3f0;--line:#d9e5e2;--teal:#167b70;--teal-strong:#0f655d;--mint:#dff4ed;--blue:#e6f0f7;--amber:#fff4d8;--red:#a63e3e;--green:#196b50;--shadow:0 18px 48px #14313a17;--shadow-small:0 8px 24px #14313a0f;--radius-xl:28px;--radius-lg:20px;--radius-md:14px;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,Noto Sans Arabic,Segoe UI,Tahoma,Arial,sans-serif}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--ink:#e4f1ee;--ink-2:#c3d8d4;--muted:#9bb4af;--surface:#13252c;--surface-2:#182e36;--surface-3:#1d3a41;--line:#2b4850;--teal:#6bcbb1;--teal-strong:#85e0c6;--mint:#1d3c3a;--blue:#203848;--amber:#453a22;--red:#f99;--green:#8de1ba;--shadow:0 18px 48px #00000038;--shadow-small:0 8px 24px 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strong{font-size:1.05rem}.lesson-toggle__meta{color:var(--muted);white-space:nowrap;align-items:center;gap:12px;font-size:.8rem;display:flex}.chevron{background:var(--surface-2);width:30px;height:30px;color:var(--teal-strong);border-radius:50%;place-items:center;font-size:1.2rem;display:grid}.lesson-content{border-top:1px solid var(--line);padding:2px 22px 22px}.lesson-goals{padding-block:15px}.lesson-goals h3,.lesson-copy h3{margin:0 0 9px;font-size:.95rem}.lesson-goals ul{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 14px;margin:0;padding:0;list-style:none;display:grid}.lesson-goals li{background:var(--surface-2);border-radius:12px;align-items:flex-start;gap:9px;padding:10px;font-size:.84rem;display:flex}.lesson-goals code,code{color:var(--teal-strong);font-size:.8rem;font-weight:850}.lesson-copy{border-top:1px solid var(--line);padding-top:16px}.lesson-copy p{color:var(--ink-2);unicode-bidi:plaintext;margin:9px 0}.formula-card{border:1px solid 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