:root{--bg: #fcfbf7;--surface: #f4f1ea;--surface-strong: #ece7dc;--text: #1b1a17;--muted: #615b50;--border: #d5cdc0;--accent: #3d5ee9;--accent-strong: #2841af;--warm: #9f5f1f;--success: #1f7a5b;--shadow: 0 16px 50px rgba(17, 19, 24, .08);--radius: 18px;--radius-sm: 12px;--container: 74rem;--measure: 72ch;--font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-serif: Iowan Old Style, Palatino Linotype, Book Antiqua, Georgia, Cambria, "Times New Roman", serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace}@media(prefers-color-scheme:dark){:root{--bg: #0f1116;--surface: #171b22;--surface-strong: #1f242d;--text: #ece8df;--muted: #b0a99a;--border: #2f3643;--accent: #7f97ff;--accent-strong: #9db0ff;--warm: #e39c56;--success: #53c79a;--shadow: 0 16px 50px rgba(0, 0, 0, .35)}}*,*:before,*:after{box-sizing:border-box}html{color-scheme:light 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1rem;color:var(--muted);font-size:.95rem}.tag-list{display:flex;flex-wrap:wrap;gap:.45rem;margin:0;padding:0;list-style:none}.tag{display:inline-flex;align-items:center;border-radius:999px;background:color-mix(in srgb,var(--surface-strong) 88%,transparent);border:1px solid var(--border);color:var(--muted);padding:.22rem .6rem;font-size:.82rem}.figure{margin:0}.figure figcaption{margin-top:.6rem;font-size:.92rem;color:var(--muted)}.pull-quote{margin:1.5rem 0;padding:1rem 1.1rem 1rem 1.2rem;border-left:4px solid var(--accent);background:color-mix(in srgb,var(--surface) 85%,transparent);font-family:var(--font-serif);font-size:1.15rem}.prose{font-size:1.05rem}.prose>:where(h2,h3){margin-top:2rem}.prose code{font-family:var(--font-mono);font-size:.9em}.prose pre{overflow-x:auto;padding:1rem;border-radius:var(--radius-sm);background:color-mix(in srgb,var(--surface-strong) 70%,transparent)}.callout{padding:1rem 1.1rem;border-radius:var(--radius-sm);border:1px solid var(--border);background:color-mix(in srgb,var(--surface) 86%,transparent)}.two-up{display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(18rem,1fr))}hr{border:0;border-top:1px solid var(--border);margin:2rem 0}.math-teaser{border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--surface) 40%,transparent)}.math-prose{font-family:var(--font-serif);font-size:1.08rem;line-height:1.75}.math-prose em{color:var(--accent);font-style:italic}.math-display{margin:1.5rem 0;padding:1.2rem 1.5rem;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);text-align:center;overflow-x:auto;font-size:1.1rem}.math-inline{font-size:.95em}.source-notes{margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border)}.source-notes h2{font-size:1.2rem;font-family:var(--font-sans);text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.source-notes 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