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button{justify-content:center;align-items:center;display:inline-flex}.searchbtn kbd{font-family:var(--font-mono);border:1px solid var(--border);color:var(--text-muted);border-radius:4px;margin-left:auto;padding:0 5px;font-size:12px}.btn-primary{background:var(--ink);color:var(--canvas);border-radius:var(--r-sm);font-size:var(--step-sm);white-space:nowrap;padding:9px 15px;font-weight:600}.btn-primary:hover{color:var(--canvas);opacity:.88;text-decoration:none}.themebtn{border-radius:var(--r-xs);cursor:pointer;width:36px;height:36px;color:var(--text-muted);background:0 0;border:0;padding:0;font-size:16px;line-height:1;transition:background-color .15s,color .15s}.themebtn:hover{background:var(--surface-muted);color:var(--text)}:root[data-theme=dark] .themebtn{color:var(--ink)}:root[data-theme=dark] .themebtn:hover{background:var(--surface-raised)}@media (width<=900px){.navtoggle{border:1px solid var(--border-input);border-radius:var(--r-sm);background:var(--surface);width:40px;height:40px;color:var(--text-secondary);cursor:pointer;justify-content:center;align-items:center;margin-left:auto;padding:0;font-size:17px;line-height:1;display:inline-flex}header.site nav{background:var(--canvas);border-bottom:1px solid var(--border-light);box-shadow:var(--shadow-raised);flex-direction:column;align-items:stretch;gap:4px;margin:0;padding:12px clamp(20px,4vw,40px) 18px;display:none;position:absolute;top:100%;left:0;right:0}header.site.is-open nav{display:flex}header.site .inner{position:relative}header.site nav>a{font-size:var(--step-body);padding:11px 4px}.searchbtn{width:100%;margin-top:6px;padding:11px 12px}.btn-primary{text-align:center;font-size:var(--step-body);padding:12px 15px}.themebtn{align-self:flex-start;margin-top:4px}}footer.site{border-top:1px solid var(--border-light);background:var(--surface-muted);color:var(--text-muted);font-size:var(--step-sm);margin-top:60px}footer.site .inner{flex-wrap:wrap;gap:16px;padding:26px 0;display:flex}.banner{font-size:var(--step-sm);padding:10px 0}.banner.info{background:var(--info-bg);color:var(--info-text)}.banner.warning{background:var(--warn-bg);color:var(--warn-text)}.banner .inner{align-items:center;gap:12px;display:flex}.banner button{color:inherit;cursor:pointer;opacity:.7;background:0 0;border:none;margin-left:auto;font-size:18px}.grid{gap:16px;display:grid}.cards{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}.card{border:1px solid var(--border);border-radius:var(--r-card);background:var(--surface);color:var(--ink);padding:20px;display:block}.card:hover{border-color:var(--border-mid);box-shadow:var(--shadow-raised);text-decoration:none}.card h3{font-size:var(--step-h4);margin:0 0 6px}.card 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(width<=1100px){.article-layout{grid-template-columns:250px minmax(0,1fr)}.artrail{display:none}}@media (width<=900px){.article-layout{flex-direction:column;gap:24px;display:flex}.article-layout>.railnav{order:2}}.artrail{flex-direction:column;gap:16px;display:flex;position:sticky;top:88px}.artmeta{border-bottom:1px solid var(--border-hairline);font-size:var(--step-sm);flex-wrap:wrap;align-items:center;gap:14px;margin:0 0 24px;padding-bottom:16px;display:flex}.artmeta-updated{color:var(--text-muted)}.artmeta-actions{gap:8px;margin-left:auto;display:flex}.artmeta-actions button{border:1px solid var(--border-input);border-radius:var(--r-xs);background:var(--surface);color:var(--text-secondary);font:inherit;font-size:var(--step-xs);cursor:pointer;align-items:center;gap:7px;padding:6px 12px;display:inline-flex}.artmeta-actions button:hover{border-color:var(--border-mid);color:var(--ink)}.readnext{margin-top:44px}.readnext h2{font-size:var(--step-h3);margin:0 0 16px}.readnext-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;display:grid}.readnext-card{border:1px solid var(--border);border-radius:var(--r-panel);background:var(--surface);color:var(--ink);flex-direction:column;gap:8px;padding:18px;display:flex}.readnext-card:hover{border-color:var(--border-mid);box-shadow:var(--shadow-raised);text-decoration:none}.readnext-title{font-weight:600;line-height:1.35}.watchit{border-radius:var(--r-card);background:var(--surface-inverse);padding:18px}.watchit-eyebrow{color:var(--highlight);display:block}.watchit-title{font-family:var(--font-serif);font-size:var(--step-h4);color:var(--text-on-inverse);margin:8px 0 14px;font-weight:500;line-height:1.25}.watchit-play{background:var(--highlight);color:#171310;border-radius:var(--r-sm);font:inherit;font-size:var(--step-sm);cursor:pointer;border:none;align-items:center;gap:8px;padding:9px 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video{border-radius:var(--r-xs);background:#000;width:100%;max-height:70vh;display:block}.copybtn{font-family:var(--font-mono);border:1px solid var(--border);background:var(--surface);border-radius:var(--r-chip);cursor:pointer;color:var(--text-muted);padding:2px 8px;font-size:11px;position:absolute;top:8px;right:8px}.toc{font-size:var(--step-sm)}.toc>.eyebrow{margin-bottom:8px;display:block}.toc a{color:var(--text-muted);border-left:2px solid var(--border-light);padding:5px 0 5px 12px;line-height:1.35;display:block}.toc a:hover{color:var(--ink);border-left-color:var(--border-mid);text-decoration:none}.toc a.toc-sub{padding-left:24px}.toc a[aria-current=true]{color:var(--ink);border-left-color:var(--brand);font-weight:600}figure.shot{margin:20px 0}figure.shot figcaption{font-size:var(--step-xs);color:var(--text-muted);margin-top:6px}.feedback{border:1px solid var(--border);border-radius:var(--r-card);background:var(--surface);margin-top:40px;padding:16px}.feedback button{border:1px 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