:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light only;--ink:#1a1a1a;--muted:#5c5c5c;--text-2:#3a3a3a;--paper:#fff;--bg:#eceae5;--page:#f6f4ef;--navy:#13284a;--accent:#1f5fbf;--accent-soft:#e6eefb;--accent-ink:#174a96;--accent-line:#b9cdf0;--rule:#d9d6cf;--rule-2:#e9e6e0;--bar:#fafaf8;--ok:#17663a;--ok-soft:#e9f5ed;--bad:#a2251b;--bad-soft:#fcecea;--amber:#714700;--amber-soft:#fdf0d8;--amber-line:#c58a1d;--marker:#f7d27e;--serif:var(--font-paper), "Times New Roman", Times, serif;--display:var(--font-ui), system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;--sans:var(--font-ui), system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;--gut:32px;--max:1180px;--shadow:0 1px 2px #13284a0f, 0 10px 28px -8px 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hidden}.tex-plain{font-family:var(--serif);white-space:nowrap}.ic{flex:none;width:20px;height:20px}.nav{z-index:20;-webkit-backdrop-filter:saturate(1.4)blur(10px);backdrop-filter:saturate(1.4)blur(10px);background:#f6f4efeb;border-bottom:1px solid #13284a17;transition:box-shadow .2s,border-color .2s,transform .25s;position:sticky;top:0}.nav[data-lifted]{border-bottom-color:#13284a1f;box-shadow:0 10px 24px -18px #13284a73}.nav[data-away]:not(:focus-within){box-shadow:none;transform:translateY(-100%)}.nav-in{min-height:64px;max-width:var(--max);padding:10px var(--gut);align-items:center;gap:20px;margin:0 auto;display:flex;position:relative}.logo{color:var(--navy);font:bold 20px/1 var(--display);flex:none;align-items:center;gap:10px;text-decoration:none;display:inline-flex}.logo-mk{flex:none;width:30px;height:30px}.nav-links{align-items:center;gap:2px;margin-left:8px;font-size:15px;display:flex}.nav-links>a{min-height:40px;color:var(--text-2);white-space:nowrap;border-radius:8px;align-items:center;padding:8px 12px;text-decoration:none;display:inline-flex;position:relative}.nav-links>a:hover{color:var(--accent-ink);background:#13284a0d}.nav-links>a[aria-current=page]{color:var(--accent-ink);font-weight:600}.nav-links>a[aria-current=page]:after{content:"";background:var(--accent);border-radius:2px;height:2px;position:absolute;bottom:3px;left:12px;right:12px}.nav-act{align-items:center;gap:10px;margin-left:auto;display:flex}.nav-cta{white-space:nowrap;border-radius:8px}.nav-cta .ic{width:17px;height:17px}html:has(#nav-menu[open]){overflow:hidden}.btn{min-height:40px;font:600 15px/1.25 var(--sans);color:var(--ink);text-align:center;cursor:pointer;background:#fff;border:1px solid #8c8c8c;border-radius:6px;justify-content:center;align-items:center;gap:8px;padding:8px 16px;text-decoration:none;display:inline-flex}.btn:hover{background:#f4f4f2}.btn-p{color:#fff;background:var(--accent);border-color:var(--accent)}.btn-p:hover{background:#17479a}.btn-l{min-height:50px;padding:12px 22px;font-size:16.5px}.btn .ic{width:18px;height:18px}.cta{flex-wrap:wrap;gap:12px;display:flex}.replay{min-height:36px;font:600 14px/1.2 var(--sans);color:var(--accent-ink);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:6px;align-items:center;gap:6px;padding:6px 12px;display:inline-flex}.replay:hover{background:#1f5fbf14}.replay .ic{width:16px;height:16px}.sec{padding:80px 0}.sec-w{border-block:1px solid var(--rule-2);background:#fff}.sec-in{max-width:var(--max);padding:0 var(--gut);margin:0 auto}.sec-h{max-width:780px;margin-bottom:40px}.kick{font:700 13px/1.4 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--accent-ink);margin:0 0 12px}.lead{color:var(--text-2);max-width:64ch;margin:16px 0 0;font-size:18.5px}.note{color:var(--muted);margin:22px 0 0;font-size:15px}.tag{font:700 12.5px/1.5 var(--sans);letter-spacing:.01em;white-space:nowrap;vertical-align:middle;border-radius:4px;align-items:center;padding:2px 9px;display:inline-flex}h2 .tag{margin-left:6px;position:relative;top:-4px}.tag-demo{color:var(--amber);background:var(--amber-soft);border:1px dashed var(--amber-line)}.tag-tbd{color:#33376a;background:#eef0fa;border:1px dashed #7d84b8}.tag-plan,.tag-some{color:var(--accent-ink);background:var(--accent-soft);border:1px solid var(--accent-line)}.tag-all{color:#444;border:1px solid var(--rule);background:#f1efea}@media (max-width:1100px){.nav-cta{display:none}}@media (max-width:1000px){.nav-in{gap:14px}.nav-in>.logo{font-size:18px}.nav-links{margin-left:0}.nav-links>a{padding-inline:9px}.nav-cta .ic{display:none}}@media (max-width:900px){:root{--gut:24px}h2{font-size:35px}.sec{padding:64px 0}.nav-links{display:none}.nav-cta{display:inline-flex}}@media (max-width:600px){:root{--gut:16px}h2{font-size:30px}.sec{padding:48px 0}.sec-h{margin-bottom:28px}.lead{font-size:17px}.logo{font-size:18px}.nav-in{gap:12px}.nav-act{gap:8px}.cta .btn-l{flex:100%}}@media (max-width:400px){.nav-cta{padding-inline:14px}.nav-cta .ic{display:none}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.nav{transition:none}.replay{display:none}}.msg{align-items:flex-end;gap:8px;min-width:0;display:flex}.msg .av{margin-bottom:1px}.bub{overflow-wrap:anywhere;min-width:0;padding:8px 12px}.bub .katex{font-size:1.08em}.bub .katex-display{margin:4px 0}.bub .math-d{margin:2px 0}.msg-t .bub{background:#fff;border:1px solid #d6d2ca;border-radius:12px 12px 12px 4px}.msg-s{justify-content:flex-end}.msg-s .bub{background:var(--accent-soft);border:1px solid #c4d4f1;border-radius:12px 12px 4px;max-width:82%}.typing{align-items:center;gap:5px;padding:12px 14px;display:inline-flex}.typing i{background:#77746d;border-radius:50%;width:7px;height:7px}