@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans+Condensed:wght@600;700&family=IBM+Plex+Sans:wght@400;500;600&display=swap");.pos{--bedrock:#0d1417;--bedrock-2:#101e22;--bedrock-line:rgba(125,180,190,.09);--paper:#f5f4ef;--paper-2:#ecebe2;--ink:#14171a;--ink-soft:#4c5154;--rule:#dcdacf;--rule-strong:#c4c2b4;--proof:#2f9e64;--proof-deep:#23713f;--blueprint:#3f86a6;--blueprint-soft:#6aa6c2;--alert:#c0473a;--amber:#a9772a;--on-dark:#e7ecec;--on-dark-soft:#9bb0b3;--rule-dark:rgba(155,176,179,.22);--mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,monospace;--sans:"IBM Plex Sans",system-ui,-apple-system,sans-serif;--cond:"IBM Plex Sans Condensed","IBM Plex Sans",sans-serif;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.62;-webkit-font-smoothing:antialiased}.pos .wrap{max-width:1080px;margin:0 auto;padding:0 28px}.pos a{color:var(--blueprint);text-decoration:none}.pos 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var(--rule-dark)}.pos .proofterm-dot{width:9px;height:9px;border-radius:999px;background:#2c3c40;display:inline-block}.pos .proofterm-title{margin-left:8px;font-size:11px}.pos .proofterm-b,.pos .proofterm-title{font-family:var(--mono);color:var(--on-dark-soft)}.pos .proofterm-b{padding:12px 14px;font-size:12.5px;line-height:1.85}.pos .pt-line{white-space:pre-wrap}.pos .pt-ok{color:var(--on-dark)}.pos .pt-ok .pt-glyph{color:var(--proof)}.pos .pt-err .pt-glyph{color:var(--alert)}.pos .pt-cmd{color:var(--on-dark)}.pos .pt-cmd .pt-glyph{color:var(--blueprint-soft)}.pos .pt-mut{color:var(--on-dark-soft)}.pos .bachart{margin:4px 0 0}.pos .bachart-cap{font-family:var(--mono);font-size:11px;color:var(--ink-soft);margin-top:8px}.pos .videoembed{position:relative;width:100%;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#000}.pos .videoembed iframe,.pos .videoembed video{position:absolute;inset:0;width:100%;height:100%;border:0}.pos .videoembed--empty{flex-direction:column;gap:10px;background:var(--bedrock-2);border:1px solid var(--rule-dark)}.pos .videoembed--empty,.pos .videoembed-play{display:flex;align-items:center;justify-content:center}.pos .videoembed-play{width:52px;height:52px;border-radius:999px;background:rgba(63,134,166,.16);color:var(--blueprint-soft)}.pos .videoembed-title{font-size:12.5px}.pos .videoembed-meta,.pos .videoembed-title{font-family:var(--mono);color:var(--on-dark-soft)}.pos .videoembed-meta{font-size:11px;opacity:.7}.pos .principles{margin-top:30px}.pos .principle{display:grid;grid-template-columns:64px 1fr;gap:20px;padding:30px 0;border-top:1px solid var(--rule);scroll-margin-top:80px}.pos .principle:first-child{border-top:none}.pos .pnum{font-family:var(--mono);font-size:26px;color:var(--blueprint);font-weight:600;line-height:1}.pos .pbody h3{font-family:var(--cond);font-weight:700;font-size:20px;color:var(--ink);margin:0 0 8px}.pos .pguarantee{font-size:16px;line-height:1.6;color:var(--ink);margin:0 0 16px;max-width:64ch}.pos .pcontrast{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:720px}.pos .pc{font-size:13.5px;line-height:1.5;color:var(--ink-soft);padding-left:12px;border-left:2px solid var(--rule-strong)}.pos .pc.with{border-left-color:var(--proof);color:var(--ink)}.pos .pcl{display:block;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:4px}.pos .pc.with .pcl{color:var(--proof-deep)}.pos .pproof{margin-top:18px;max-width:520px}@media (max-width:640px){.pos .principle{gap:8px}.pos .pcontrast,.pos .principle{grid-template-columns:1fr}}.pos .prinbadge{display:inline-flex;align-items:center;gap:8px;margin:2px 0 16px;padding:5px 12px;border:1px solid var(--rule-dark);border-radius:999px;font-family:var(--mono);font-size:12px;color:var(--on-dark-soft);text-decoration:none;transition:border-color .15s,color .15s}.pos .prinbadge:hover{border-color:var(--blueprint);text-decoration:none}.pos .prinbadge .pbn,.pos .prinbadge:hover{color:var(--blueprint-soft)}.pos .toolvideo{margin-top:30px;max-width:720px}