:root{--bg:#1a1a2e;--card:#252540;--res:#112;--inp:#1a1a30;--brd:#33335a;--rbrd:#2a2a50;--txt:#e0e0e0;--mut:#88a;--lbl:#99b;--hnt:#77a;--acc:#f0c040;--acch:#ffd060;--accfg:#1a1a2e;--brkbrd:#1e1e38;--brktxt:#ccd;--hbg:#1a1a30;--hmeta:#66a;--clrbrd:#3a3a5a;--faqbg:#1e1e38;--faqbrd:#2a2a50;--faqans:#181830;--ftbg:#0d0d1a;--fttxt:#88a}[data-theme=light]{--bg:#f0f2fa;--card:#fff;--res:#f7f7ff;--inp:#f2f2f8;--brd:#c8c8e0;--rbrd:#d0d0e8;--txt:#1a1a2e;--mut:#555580;--lbl:#555580;--hnt:#66a;--acc:#c49000;--acch:#d4a000;--accfg:#fff;--brkbrd:#e4e4f0;--brktxt:#2a2a4e;--hbg:#f4f4fc;--hmeta:#77a;--clrbrd:#c8c8e0;--faqbg:#fff;--faqbrd:#d8d8ec;--faqans:#f4f4ff;--ftbg:#1a1a2e;--fttxt:#88a}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--txt);min-height:100vh;font-family:Segoe UI,system-ui,sans-serif;transition:background .25s,color .25s}.topbar{background:var(--res);border-bottom:1px solid 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