.sm-shell{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#0a1120;--surface:#0e1729;--surface-2:#16223a;--surface-3:#1c2a45;--border:#223050;--border-soft:#1a253e;--text-strong:#f4f6fb;--text:#e7ecf5;--text-body:#cfd7e6;--text-muted:#92a0bc;--text-faint:#5c6b8a;--accent:#2fd199;--accent-strong:#58e0b3;--accent-soft:#2fd1991f;--accent-border:#2fd19959;--on-accent:#05271d;--tip:#e8b84b;--tip-soft:#e8b84b1a;--tip-border:#e8b84b4d;--backdrop:#040810b8;--shadow-lg:0 24px 60px #00000080;--font-display:var(--font-inter,"Inter"), -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--font-ui:var(--font-inter,"Inter"), -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--font-mono:ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;--shell-max:1440px;--shell-pad:20px;background:var(--bg);min-height:100dvh;color:var(--text);font-family:var(--font-ui)}:root[data-sm-theme=light] .sm-shell{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#fff;--surface:#f8fafc;--surface-2:#eef2f8;--surface-3:#e3e9f2;--border:#d6dee9;--border-soft:#e6ebf3;--text-strong:#0b1220;--text:#16202f;--text-body:#33415a;--text-muted:#55637d;--text-faint:#78849a;--accent:#0d8f62;--accent-strong:#0a7350;--accent-soft:#0d8f6217;--accent-border:#0d8f624d;--on-accent:#fff;--tip:#8a6100;--tip-soft:#e8b84b29;--tip-border:#b88a2061;--backdrop:#0f172a57;--shadow-lg:0 24px 60px #0f172a2e}.sm-theme-toggle{justify-content:center;width:36px;padding:0}@media (max-width:560px){.sm-theme-toggle{width:40px}}.sm-topbar{z-index:10;height:56px;padding:0 max(var(--shell-pad), calc((100% - var(--shell-max)) / 2 + var(--shell-pad)));background:var(--surface);border-bottom:1px solid var(--border-soft);align-items:center;gap:16px;display:flex;position:sticky;top:0}.sm-breadcrumb{color:var(--text-muted);white-space:nowrap;align-items:center;gap:8px;min-width:0;font-size:13px;display:flex;overflow:hidden}.sm-breadcrumb a{color:var(--text-muted);text-decoration:none}.sm-breadcrumb a:hover{color:var(--text)}.sm-breadcrumb .sep{color:var(--text-faint)}.sm-breadcrumb .current{color:var(--text);font-weight:600}.sm-search-trigger{border:1px solid var(--border);background:var(--surface-2);min-width:0;height:34px;color:var(--text-faint);cursor:pointer;border-radius:8px;flex-shrink:0;align-items:center;gap:8px;margin-left:auto;padding:0 10px;font-family:inherit;font-size:12.5px;display:inline-flex}.sm-search-trigger:hover{border-color:var(--accent-border);color:var(--text-muted)}.sm-search-trigger .keys{border:1px solid var(--border);font-family:var(--font-mono);border-radius:5px;padding:2px 6px;font-size:10.5px;line-height:1.4}@media (max-width:720px){.sm-search-trigger{justify-content:center;width:44px;height:44px;padding:0}.sm-search-trigger .label,.sm-search-trigger .keys{display:none}}.sm-search-backdrop{z-index:60;background:var(--backdrop);justify-content:center;padding:12vh 16px 16px;display:flex;position:fixed;inset:0}.sm-search-panel{border:1px solid var(--border);background:var(--surface);width:100%;max-width:620px;max-height:70vh;box-shadow:var(--shadow-lg);border-radius:14px;flex-direction:column;display:flex;overflow:hidden}.sm-search-field{border-bottom:1px solid var(--border-soft);color:var(--text-faint);align-items:center;gap:10px;padding:0 14px;display:flex}.sm-search-field input{min-width:0;height:52px;color:var(--text);background:0 0;border:none;outline:none;flex:1;font-family:inherit;font-size:15px}.sm-search-field input::placeholder{color:var(--text-faint)}.sm-search-field .esc{border:1px solid var(--border);font-family:var(--font-mono);border-radius:5px;padding:2px 6px;font-size:10.5px}.sm-search-results{padding:6px;overflow-y:auto}.sm-search-note{color:var(--text-faint);margin:0;padding:18px 12px;font-size:13px}.sm-search-hit{text-align:left;width:100%;min-height:44px;color:var(--text);cursor:pointer;background:0 0;border:none;border-radius:8px;align-items:center;gap:11px;padding:8px 10px;font-family:inherit;display:flex}.sm-search-hit[data-active=true]{background:var(--surface-2)}.sm-search-hit .kind{color:var(--text-faint);flex-shrink:0}.sm-search-hit[data-active=true] .kind{color:var(--accent)}.sm-search-hit .text{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.sm-search-hit .title{font-size:13.5px;line-height:1.35}.sm-search-hit .context{color:var(--text-faint);text-overflow:ellipsis;white-space:nowrap;font-size:11.5px;overflow:hidden}.sm-search-hit .badge{background:var(--surface-3);color:var(--text-muted);border-radius:999px;flex-shrink:0;padding:2px 7px;font-size:10.5px;font-weight:600}.sm-search-foot{border-top:1px solid 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288px);grid-template-columns:320px minmax(0,1fr)}.sm-sidebar{height:calc(100dvh - 56px);padding:18px 12px 40px;position:sticky;top:56px;overflow-y:auto}.sm-sidebar-left{border-right:1px solid var(--border-soft)}.sm-sidebar-right{border-left:1px solid var(--border-soft);padding:22px 14px 40px}.sm-sidebar-title{border-bottom:1px solid var(--border-soft);font-family:var(--font-display);letter-spacing:-.012em;margin-bottom:10px;padding:0 6px 14px;font-size:15px;font-weight:700;line-height:1.35}.sm-practice-link{color:var(--accent-strong);border-radius:7px;align-items:center;gap:7px;margin:-2px 0 12px;padding:8px;font-size:12.5px;font-weight:600;text-decoration:none;display:flex}.sm-practice-link:hover{background:var(--accent-soft);color:var(--accent)}.sm-chapter-list{flex-direction:column;gap:2px;display:flex}.sm-chapter-link{color:var(--text-muted);border-left:2px solid #0000;border-radius:7px;align-items:baseline;gap:10px;padding:8px 10px 8px 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p{color:var(--text);margin:0;font-size:13.5px;line-height:1.6}.sm-practice{border:1px solid var(--accent-border);border-radius:10px;margin:0 0 22px;overflow:hidden}.sm-practice .label,.sm-practice .answer-label{letter-spacing:.05em;text-transform:uppercase;margin:0;padding:12px 18px;font-size:11px;font-weight:700}.sm-practice .label{color:var(--accent-strong);background:var(--accent-soft);border-bottom:1px solid var(--accent-border)}.sm-practice .prompt{color:var(--text);margin:14px 18px;font-size:14.5px;line-height:1.65}.sm-practice .answer-label{cursor:pointer;min-height:44px;color:var(--text-faint);background:var(--surface-2);border-top:1px dashed var(--border);align-items:center;gap:7px;list-style:none;transition:color .15s;display:flex}.sm-practice .answer-label::-webkit-details-marker{display:none}.sm-practice .answer-label:hover,.sm-practice-answer[open]>.answer-label{color:var(--accent-strong)}.sm-practice-answer[open]>.answer-label{border-bottom:1px solid 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var(--border-soft);grid-template-columns:1fr 1fr;gap:14px;margin-top:40px;padding-top:24px;display:grid}.sm-chapter-nav a{border:1px solid var(--border);background:var(--surface);border-radius:9px;padding:14px 16px;text-decoration:none;display:block}.sm-chapter-nav .dir{letter-spacing:.05em;text-transform:uppercase;color:var(--text-faint);margin:0 0 6px;font-size:11px;font-weight:700}.sm-chapter-nav .next{text-align:right}.sm-chapter-nav .next .dir{color:var(--accent)}.sm-chapter-nav .ctitle{font-family:var(--font-display);color:var(--text);font-size:14px}.sm-mobile-toc{max-width:var(--shell-max);border:1px solid var(--border);background:var(--surface);border-radius:10px;margin:0 20px 20px;display:none}.sm-mobile-toc>summary{cursor:pointer;padding:12px 16px;font-size:13px;font-weight:600}.sm-mobile-toc-body{padding:0 12px 12px}.sm-mobile-toc[open] .sm-topic-tree{padding-bottom:10px}@media (max-width:1100px){.sm-layout,.sm-layout.sm-layout--no-onpage{grid-template-columns:320px 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