:root{--font:"Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--ink:#0f172a;--body-text:#334155;--muted:#55637a;--bg:#fff;--bg-alt:#f8fafc;--surface:#fff;--border:#e2e8f0;--accent:#0369a1;--accent-ink:#fff;--accent-soft:#0369a114;--radius-sm:8px;--radius:14px;--radius-lg:22px;--shadow:0 1px 2px #0f172a0a, 0 8px 24px #0f172a0f;--shadow-lg:0 20px 50px #0f172a1a;--container:1120px;color-scheme:light}:root.dark-mode{--ink:#f1f5f9;--body-text:#cbd5e1;--muted:#94a3b8;--bg:#0b1220;--bg-alt:#0f1729;--surface:#131b2c;--border:#1f2937;--accent:#0ea5e9;--accent-ink:#04121c;--accent-soft:#0ea5e91f;--shadow:0 1px 2px #0000004d, 0 8px 24px #00000059;--shadow-lg:0 20px 50px #00000073;color-scheme:dark}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font);color:var(--body-text);background:var(--bg);margin:0;font-size:16px;line-height:1.65;transition:background-color .25s,color 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a{color:var(--body-text);border-radius:999px;align-items:center;gap:6px;padding:10px 14px;font-size:.95rem;font-weight:500;display:flex}.navmenu a:hover,.navmenu a.active{background:var(--accent-soft);color:var(--accent);text-decoration:none}.header-actions{align-items:center;gap:10px;display:flex}#theme-toggle{border:1px solid var(--border);background:var(--surface);color:var(--ink);border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;display:flex}#theme-toggle .icon-dark,:root.dark-mode #theme-toggle .icon-light{display:none}:root.dark-mode #theme-toggle .icon-dark{display:block}.mobile-nav-toggle{border:1px solid var(--border);background:var(--surface);color:var(--ink);border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;font-size:1.2rem;display:none}@media (width<=780px){.navmenu{display:none}.mobile-nav-toggle{display:flex}.header-actions .btn-primary.btn-sm{display:none}body.mobile-nav-active 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