:root{--paper:#0a0d1a;--card:#101527;--ink:#eceef6;--secondary:#b9bfd2;--muted:#8c93ac;--faint:#5f6781;--accent:#ffb454;--accent-ink:#ffd54f;--on-accent:#0a0d1a;--line:#eceef61f;--line-strong:#eceef633;--ink-ghost:#eceef659;--accent-soft:#ffb45412;--accent-border:#ffb45499;--chip:#141a2b;--warn:#e0a45e;--ok:#79c795;--err:#e28080;--canvas-light-bg:#f4f1e9;--canvas-light-ink:#262b30;--canvas-accent:#0f7a8a;--canvas-accent-ink:#0b5d6a;--fig-a:#0f7a8a;--fig-b:#c2571a;--fig-unit:#c95f6a;--fig-const:#8fae2e;--font-head:"STIX Two Text", Georgia, "Times New Roman", serif;--font-ui:"Onest", system-ui, -apple-system, "Segoe UI", sans-serif;--font-body:Georgia, "Times New Roman", serif;--font-mono:"JetBrains Mono", ui-monospace, Menlo, Consolas, monospace}:root[data-theme=light]{--paper:#fbfaf7;--card:#fff;--ink:#20262b;--secondary:#5e6a72;--muted:#8a959b;--faint:#a8b0ab;--accent:#0f7a8a;--accent-ink:#0b5d6a;--on-accent:#fbfaf7;--line:#e4e1d8;--line-strong:#20262b40;--ink-ghost:#20262b4d;--accent-soft:#0f7a8a0f;--accent-border:#0f7a8a73;--chip:#eef0ea;--warn:#b4530a;--ok:#2f7d4f;--err:#b3383d}.marabu-dark{--bg:#0a0d1a;--paper:#0a0d1a;--card:#101527;--ink:#eceef6;--muted:#8c93ac;--accent:#ffb454;--accent-ink:#ffd54f;--chip:#141a2b;--line:#eceef61f;--glow:#ffb45447;--screen:#06080f;--warn:#ff7043;--font-body:"Golos Text", system-ui, -apple-system, "Segoe UI", sans-serif}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;color-scheme:dark}html[data-theme=light]{color-scheme:light}body{background:var(--paper);color:var(--ink);font:16px/1.6 var(--font-ui);margin:0}::selection{background:#ffb4544d}:root[data-theme=light] ::selection{background:#0f7a8a38}.page{max-width:46rem;margin:0 auto;padding:2.2rem 1.2rem 4rem}.page--wide{max-width:62rem}h1,h2,h3,h4,h5,h6{font-family:var(--font-head);line-height:1.25}a{color:var(--accent)}.site-top{border-bottom:1px solid var(--line);font-size:13.5px;font-family:var(--font-ui);flex-wrap:wrap;align-items:baseline;gap:14px;min-height:52px;padding:12px 1.4rem;display:flex}.site-top__brand{font-family:var(--font-head);color:var(--ink);font-size:16px;font-weight:700;text-decoration:none}.site-top__brand:hover{color:var(--accent)}.site-top__mark{vertical-align:-4px;width:30px;height:18px;margin-right:5px}.site-top__mark line{stroke:currentColor;stroke-opacity:.5;stroke-width:2.4px;stroke-linecap:round}.site-top nav{flex-wrap:wrap;gap:16px;display:flex}.site-top nav a{color:var(--muted);text-decoration:none}.site-top nav a:hover{color:var(--accent)}.site-top__right{align-items:center;gap:12px;margin-left:auto;display:flex}.site-top__theme{border:1px solid var(--line);color:var(--ink);cursor:pointer;background:0 0;border-radius:999px;padding:3px 10px;font-size:12.5px;line-height:19px}.site-top__theme:hover{border-color:var(--accent)}.site-top__login{color:var(--accent);border:1px solid var(--accent-border);border-radius:999px;padding:3px 14px;font-size:12.5px;line-height:19px;text-decoration:none}.site-top__login:hover{background:var(--accent);color:var(--on-accent)}.site-top__who[hidden]{display:none}.site-top__who{color:var(--muted);align-items:center;gap:10px;font-size:12.5px;line-height:19px;display:flex}.site-top__cab{color:var(--accent-ink);border:1px solid var(--accent);border-radius:999px;padding:3px 12px;line-height:19px;text-decoration:none}.site-top__cab:hover{background:var(--accent);color:var(--on-accent)}.site-top__cab[hidden]{display:none}.site-top__out{border:1px solid var(--line);font:inherit;color:var(--muted);cursor:pointer;background:0 0;border-radius:999px;padding:3px 10px;line-height:19px}.site-top__out:hover{border-color:var(--accent);color:var(--accent-ink)}.entry-btn{background:var(--accent);color:var(--on-accent);font-family:var(--font-ui);border-radius:10px;padding:9px 20px;font-size:15px;font-weight:600;text-decoration:none;display:inline-block}.entry-btn:hover{background:var(--accent-ink)}.entry-note{color:var(--muted);font-size:14px}.blk{margin:2.2rem 0}.blk>h3{margin:0 0 .5rem}.blk h4{margin:1.4rem 0 .35rem;font-size:1.06em}.blk h5,.blk h6{margin:1.1rem 0 .3rem;font-size:1em}.blk-out{margin:.6rem 0 0;font-size:15px}.blk-math{padding:.35rem 0;overflow-x:auto}.blk-math>.katex-display{margin:.6em 0}.blk-fig svg{max-width:100%;height:auto;color:var(--ink)}.blk-fig{text-align:center;margin:1.6rem 0}.blk-fig figcaption{color:var(--muted);text-align:left;max-width:34rem;margin:0 auto;font-size:14px;line-height:1.5}.blk-fig figcaption p{margin:.5rem 0 0}.blk-fig__num{color:var(--ink);font-weight:600}.blk-gated{border:1px dashed var(--line);border-left:3px solid var(--warn);background:var(--chip);color:var(--muted);border-radius:8px;padding:9px 12px;font-size:14px}.blk-gated__label{color:var(--warn);font-weight:600}.blk-ref{color:var(--accent);border-bottom:1px dotted;text-decoration:none}.blk-ref--plain{color:inherit;border-bottom:1px dotted var(--line)}.week-meta{color:var(--muted);font-size:14.5px}.week-chips{flex-wrap:wrap;gap:7px;margin:10px 0 4px;display:flex}.week-chips span,.week-chips a{font-family:var(--font-mono);border:1px solid var(--line);color:var(--ink);background:var(--card);border-radius:999px;padding:3px 10px;font-size:11.5px;text-decoration:none}.week-chips a:hover{border-color:var(--accent);color:var(--accent-ink)}.chapter-nav{margin:14px 0 26px}.week-toc{padding-left:1.4rem}.week-toc li{margin:.3rem 0}.demo-frame{border:1px solid var(--line);background:#0a0d1a;border-radius:14px;width:100%;height:560px}@media (width<=640px){.page{padding:1.4rem .9rem 3rem}body{font-size:16px}.demo-frame{height:78vh;min-height:420px}}@media print{@page{margin:16mm 14mm}:root,:root[data-theme]{--paper:#fff;--card:#fff;--ink:#20262b;--secondary:#444c52;--muted:#5e6a72;--faint:#8a959b;--accent:#0f7a8a;--accent-ink:#0b5d6a;--line:#d8d5cc;--line-strong:#20262b4d;--ink-ghost:#20262b4d;--accent-soft:#0f7a8a0f;--accent-border:#0f7a8a73;--chip:#f0efe9;--on-accent:#20262b;--warn:#b4530a;--ok:#2f7d4f;--err:#b3383d}html{color-scheme:light}body{font-size:11.5pt;font-family:var(--font-body);background:#fff}.site-top,.chapter-nav,.demo-frame,.map-frame,.blk-out{display:none}.page,.page--wide{max-width:none;padding:0}.blk-math{overflow-x:visible}.blk-math,.blk-fig,.blk-gated{break-inside:avoid}h1,h2,h3,h4{break-after:avoid}h2{margin-top:1.4rem}a{color:inherit;text-decoration:none}.blk-ref,.blk-ref--plain{border-bottom:0}.week-chips span,.week-chips a{background:0 0}}