:root{--bip-ink: #16181d;--bip-ink-soft: #333844;--bip-muted: #656c7a;--bip-page: #f4f5fa;--bip-surface: #ffffff;--bip-surface-2: #f4f5f9;--bip-border: #e7e9f1;--bip-border-strong: #d5d9e5;--bip-primary: #4f46e5;--bip-primary-strong: #4338ca;--bip-primary-tint: #eef0fe;--bip-accent: #7c3aed;--bip-sky: #0ea5e9;--bip-focus: #0b5fff;--bip-grad: linear-gradient(120deg, #4f46e5 0%, #7c3aed 52%, #0ea5e9 120%);--bip-grad-soft: linear-gradient(120deg, #6366f1, #8b5cf6);--bip-radius: 20px;--bip-radius-md: 14px;--bip-radius-sm: 10px;--bip-shadow-xs: 0 1px 2px rgba(20, 24, 40, .05);--bip-shadow-sm: 0 2px 6px rgba(20, 24, 40, .05), 0 1px 2px rgba(20, 24, 40, .04);--bip-shadow-md: 0 10px 30px rgba(24, 27, 54, .08);--bip-shadow-lg: 0 28px 64px rgba(24, 27, 54, .16);--bip-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--bip-serif: "Fraunces", Georgia, "Times New Roman", serif;--bip-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;--bip-container: 1160px;--bip-reading: 760px}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:92px}body{margin:0;min-height:100vh;font-family:var(--bip-sans);font-size:16px;line-height:1.65;color:var(--bip-ink);background:radial-gradient(900px 480px at 88% -6%,rgba(124,58,237,.1),transparent 60%),radial-gradient(760px 420px at -6% -2%,rgba(79,70,229,.1),transparent 58%),var(--bip-page);background-attachment:fixed;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}.ns-shell{display:grid;grid-template-rows:auto 1fr auto;min-height:100vh}.ns-main{flex:1 0 auto;width:100%;max-width:var(--bip-reading);margin:0 auto;padding:48px 24px 88px}.ns-main--wide{max-width:940px}.ns-main:focus,.ns-main:focus-visible{outline:none}.ns-panel{background:var(--bip-surface);border:1px solid var(--bip-border);border-radius:var(--bip-radius);box-shadow:var(--bip-shadow-md);padding:clamp(24px,4vw,44px)}.ns-panel+.ns-panel{margin-top:24px}.ns-skip{position:absolute;left:16px;top:14px;z-index:60;padding:10px 18px;border-radius:var(--bip-radius-sm);border:2px solid var(--bip-focus);background:var(--bip-surface);color:var(--bip-primary);font-weight:600;text-decoration:none;transform:translateY(-200%);transition:transform .16s cubic-bezier(.2,0,0,1)}.ns-skip:focus{transform:translateY(0)}.ns-header{position:sticky;top:0;z-index:30;flex:0 0 auto;background:#fafafdb8;backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--bip-border)}.ns-header__inner{max-width:var(--bip-container);margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}.bip-wordmark{font-family:var(--bip-serif);font-weight:600;font-size:23px;letter-spacing:-.02em;line-height:1;text-decoration:none;background:var(--bip-grad);-webkit-background-clip:text;background-clip:text;color:transparent;white-space:nowrap}a.bip-wordmark{padding:4px;border-radius:var(--bip-radius-sm)}.ns-header__nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap}nav[aria-label=Primary] ul{list-style:none;display:flex;align-items:center;gap:2px;margin:0;padding:0;flex-wrap:wrap}nav[aria-label=Primary] a{display:inline-flex;align-items:center;min-height:40px;padding:8px 14px;border-radius:var(--bip-radius-sm);color:var(--bip-ink-soft);font-weight:500;text-decoration:none;transition:background-color .13s ease,color .13s ease}nav[aria-label=Primary] a:hover{background:var(--bip-surface-2);color:var(--bip-primary)}nav[aria-label=Primary] a[aria-current=page]{color:var(--bip-primary-strong);background:var(--bip-primary-tint)}.bip-cta{display:inline-flex;align-items:center;min-height:40px;padding:9px 18px;border-radius:999px;background:var(--bip-grad);color:#fff!important;font-weight:600;text-decoration:none;box-shadow:0 6px 18px #4f46e552;transition:transform .12s ease,box-shadow .12s ease,filter .12s ease}.bip-cta:hover{filter:brightness(1.05);box-shadow:0 10px 26px #4f46e56b;transform:translateY(-1px)}.bip-kicker{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:0 0 20px;color:var(--bip-muted);font-size:13.5px}.bip-chip{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;font-size:12px;font-weight:650;letter-spacing:.04em;text-transform:uppercase;color:var(--bip-primary-strong);background:var(--bip-primary-tint);border:1px solid rgba(79,70,229,.16)}.bip-chip--sim{color:#0369a1;background:#e6f4fc;border-color:#0ea5e92e}.bip-chip--edit{color:#9333ea;background:#f6ecfe;border-color:#9333ea2e}.bip-meta-sep{width:4px;height:4px;border-radius:50%;background:var(--bip-border-strong)}.ns-main h1{font-family:var(--bip-serif);font-weight:600;font-size:clamp(34px,5.4vw,52px);line-height:1.08;letter-spacing:-.02em;margin:0 0 16px;color:var(--bip-ink)}.ns-main h2{font-family:var(--bip-serif);font-weight:600;font-size:clamp(22px,3vw,27px);line-height:1.25;letter-spacing:-.01em;margin:40px 0 12px}.ns-main h3{font-weight:650;font-size:18px;line-height:1.35;margin:26px 0 8px}.ns-main p{margin:14px 0;color:var(--bip-ink-soft)}.ns-article>h1+p{font-family:var(--bip-sans);font-size:20px;line-height:1.6;color:var(--bip-muted);margin-bottom:28px}.ns-article-panel{position:relative;overflow:hidden}.ns-article-panel:before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--bip-grad)}.bip-article-foot{margin-top:32px;padding-top:20px;border-top:1px solid var(--bip-border)}.ns-main a:not(.bip-wordmark):not([class^=bip-]):not([class*=" bip-"]){color:var(--bip-primary);text-underline-offset:3px;text-decoration-thickness:1px;font-weight:500}.ns-main a:not(.bip-wordmark):not([class^=bip-]):not([class*=" bip-"]):hover{color:var(--bip-primary-strong)}.ns-main ul,.ns-main ol{padding-left:1.3em;color:var(--bip-ink-soft)}.ns-main li{margin:7px 0}.ns-main output:empty{display:none}.ns-main output{display:inline-flex;align-items:center;gap:8px;padding:6px 13px;border-radius:999px;background:#eafaf1;border:1px solid rgba(22,163,74,.22);color:#15803d;font-size:13px;font-weight:600}.ns-main output:before{content:"";width:8px;height:8px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 3px #22c55e2e}.ns-outline ol{list-style:none;padding-left:0;counter-reset:bip-outline}.ns-outline li{counter-increment:bip-outline;padding:10px 14px 10px 44px;position:relative;border:1px solid var(--bip-border);border-radius:var(--bip-radius-sm);margin:8px 0;background:var(--bip-surface-2)}.ns-outline li:before{content:counter(bip-outline);position:absolute;left:12px;top:50%;transform:translateY(-50%);width:22px;height:22px;display:inline-flex;align-items:center;justify-content:center;border-radius:7px;background:var(--bip-primary-tint);color:var(--bip-primary-strong);font-size:12px;font-weight:700}button,input,textarea,select{font:inherit;color:inherit}.ns-main button{cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;min-width:42px;padding:10px 18px;border-radius:var(--bip-radius-sm);border:1px solid var(--bip-border-strong);background:var(--bip-surface);color:var(--bip-ink);font-weight:600;box-shadow:var(--bip-shadow-xs);transition:background-color .13s ease,border-color .13s ease,box-shadow .13s ease,transform 60ms ease}.ns-main button:hover{background:var(--bip-surface-2);border-color:var(--bip-primary);color:var(--bip-primary-strong)}.ns-main button:active{transform:translateY(1px)}.ns-main button:focus-visible,.ns-main a:focus-visible,.ns-main input:focus-visible,.ns-main textarea:focus-visible,.ns-main select:focus-visible,nav[aria-label=Primary] a:focus-visible,.bip-wordmark:focus-visible,.bip-cta:focus-visible{outline:2px solid var(--bip-focus);outline-offset:2px}.ns-main input,.ns-main textarea:not(.bip-runner__code),.ns-main select{background:var(--bip-surface);border:1px solid var(--bip-border-strong);border-radius:var(--bip-radius-sm);padding:10px 12px}.ns-footer{margin-top:auto;background:#0f1117;color:#c8ccd6}.ns-footer__inner{max-width:var(--bip-container);margin:0 auto;padding:56px 24px 28px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}.ns-footer__brand .bip-wordmark{font-size:26px}.ns-footer__brand p{margin:14px 0 0;max-width:34ch;color:#949aa8;font-size:14.5px}.ns-footer h2{font-family:var(--bip-sans);font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#7e8598;margin:0 0 14px}.ns-footer ul{list-style:none;margin:0;padding:0}.ns-footer li{margin:9px 0}.ns-footer a{color:#c8ccd6;text-decoration:none;font-size:14.5px;transition:color .12s ease}.ns-footer a:hover{color:#fff}.ns-footer a:focus-visible{outline:2px solid #8ab4ff;outline-offset:3px;border-radius:4px}.ns-footer__bar{max-width:var(--bip-container);margin:0 auto;padding:20px 24px 40px;border-top:1px solid rgba(255,255,255,.08);color:#7e8598;font-size:13.5px}@media(max-width:720px){.ns-footer__inner{grid-template-columns:1fr 1fr}.ns-footer__brand{grid-column:1 / -1}}.bip-docs{grid-template-rows:auto 1fr auto}.bip-docs__footer .ns-footer__inner,.bip-docs__footer .ns-footer__bar{max-width:none}.bip-docs__body{display:grid;grid-template-columns:300px minmax(0,1fr);width:100%;gap:0}.bip-docs__main{max-width:none;padding:32px clamp(20px,4vw,56px) 64px}.bip-docs-header__inner{max-width:none;padding:8px clamp(16px,3vw,32px) 6px;display:flex;flex-direction:column;gap:2px}.bip-docs-header__top{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:20px}.bip-docs-header__left{display:flex;align-items:center;gap:10px}.bip-menu-btn{display:none;font-size:18px;background:transparent;border:1px solid var(--bip-border);border-radius:9px;min-height:38px;min-width:38px;cursor:pointer;color:var(--bip-ink)}.bip-search{position:relative;display:flex;align-items:center;max-width:560px;width:100%;justify-self:center}.bip-search__icon{position:absolute;left:12px;font-size:16px;color:var(--bip-muted);pointer-events:none}.bip-search__input{width:100%;padding:10px 14px 10px 34px;border-radius:999px;border:1px solid var(--bip-border-strong);background:var(--bip-surface);font-size:15px}.bip-search__input:focus-visible{outline:2px solid var(--bip-focus);outline-offset:1px;border-color:var(--bip-primary)}.bip-docs-header__right{display:flex;align-items:center;gap:8px}.bip-docs-header__right>a:not(.bip-cta){padding:8px 12px;border-radius:8px;color:var(--bip-ink-soft);text-decoration:none;font-weight:550}.bip-docs-header__right>a:not(.bip-cta):hover{background:var(--bip-surface-2);color:var(--bip-primary)}.bip-docs-header__subjects ul{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:0;margin:0;padding:0}nav.bip-docs-header__subjects a{display:inline-flex;align-items:center;min-height:32px;padding:4px 10px;border-radius:8px;color:var(--bip-ink-soft);text-decoration:none;font-weight:550;font-size:13.5px;white-space:nowrap;background:transparent}nav.bip-docs-header__subjects a:hover{background:var(--bip-surface-2);color:var(--bip-primary)}nav.bip-docs-header__subjects a[aria-current=page]{color:var(--bip-ink);background:var(--bip-surface-2);font-weight:650}.bip-user{display:flex;align-items:center;gap:10px}.bip-user__name{font-size:13px;color:var(--bip-muted);max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bip-user__btn{border:1px solid var(--bip-border-strong);background:var(--bip-surface);border-radius:999px;padding:7px 14px;font-weight:600;cursor:pointer}.bip-sidebar{border-right:1px solid var(--bip-border);padding:20px 8px 40px 4px;overflow-y:auto;max-height:calc(100vh - 66px);position:sticky;top:66px}.bip-sidebar__head{display:flex;align-items:center;justify-content:space-between;padding:0 12px 8px}.bip-sidebar__title{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--bip-muted)}.bip-sidebar__back{font-size:13px;font-weight:600;color:var(--bip-primary);text-decoration:none}.bip-sidebar__back:hover{color:var(--bip-primary-strong)}.bip-sidebar__close{display:none;background:transparent;border:0;font-size:16px;cursor:pointer}.bip-sidebar__cats{list-style:none;margin:0;padding:0}.bip-sidebar__catlink{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 12px;border-radius:9px;text-decoration:none;color:var(--bip-ink);font-weight:600;font-size:14px}.bip-sidebar__catlink:hover{background:var(--bip-surface-2)}.bip-sidebar__catlink.is-active{background:var(--bip-primary-tint);color:var(--bip-primary-strong)}.bip-sidebar__count{font-size:11px;color:var(--bip-muted);background:var(--bip-surface-2);border-radius:999px;padding:1px 8px}.bip-sidebar__tree{padding:4px 0 8px 6px}.bip-sidebar__modlabel{font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--bip-muted);padding:10px 12px 4px}.bip-sidebar__tree ul{list-style:none;margin:0;padding:0}.bip-sidebar__lesson{display:block;padding:6px 12px 6px 14px;border-left:2px solid transparent;color:var(--bip-ink-soft);text-decoration:none;font-size:13.5px;border-radius:0 8px 8px 0}.bip-sidebar__lesson:hover{background:var(--bip-surface-2);color:var(--bip-primary)}.bip-sidebar__lesson.is-active{background:var(--bip-primary-tint);border-left-color:var(--bip-primary);color:var(--bip-primary-strong);font-weight:600}.bip-lede{font-size:19px;color:var(--bip-muted);line-height:1.6;margin-bottom:24px}.bip-catgrid{list-style:none;margin:12px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}.bip-course{margin-top:40px}.bip-course__head{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;padding-bottom:10px;border-bottom:1px solid var(--bip-border)}.bip-course__num{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--bip-primary);background:var(--bip-primary-tint);padding:3px 10px;border-radius:999px}.bip-course__title{font-family:var(--bip-serif);font-weight:600;font-size:clamp(20px,2.6vw,26px);margin:0;letter-spacing:-.01em}.bip-sidebar__course{margin-bottom:6px}.bip-sidebar__coursehead{padding:14px 12px 6px;font-size:13px;font-weight:700;color:var(--bip-ink);line-height:1.3;border-top:1px solid var(--bip-border);margin-top:6px}.bip-sidebar__course:first-of-type .bip-sidebar__coursehead{border-top:0;margin-top:0}.bip-sidebar__coursenum{display:block;font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--bip-primary);margin-bottom:2px}.bip-catcard{display:flex;flex-direction:column;gap:4px;padding:16px;border:1px solid var(--bip-border);border-radius:14px;background:var(--bip-surface);text-decoration:none;box-shadow:var(--bip-shadow-xs);transition:transform .12s ease,box-shadow .12s ease,border-color .12s ease}.bip-catcard:hover{transform:translateY(-2px);box-shadow:var(--bip-shadow-md);border-color:var(--bip-primary)}.bip-catcard__title{font-family:var(--bip-serif);font-weight:600;font-size:17px;line-height:1.25;color:var(--bip-ink)}.bip-catcard__count{font-size:13px;color:var(--bip-muted)}.bip-sidebar__catname{min-width:0;white-space:normal;font-size:13.5px;line-height:1.3}.bip-lessonlist,.bip-results{list-style:none;margin:16px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}.bip-lessonlist a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border:1px solid var(--bip-border);border-radius:12px;background:var(--bip-surface);text-decoration:none;color:var(--bip-ink);font-weight:550}.bip-lessonlist a:hover{border-color:var(--bip-primary);color:var(--bip-primary-strong)}.bip-course-module{margin-top:28px}.bip-course-module h2{font-size:15px;font-weight:700;letter-spacing:.02em;color:var(--bip-muted);text-transform:none;margin:0 0 10px}.bip-kind-badge{flex:none;font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--bip-primary-strong);background:var(--bip-primary-tint);border-radius:999px;padding:2px 10px}.bip-result{display:flex;justify-content:space-between;gap:16px;padding:14px 16px;border:1px solid var(--bip-border);border-radius:12px;background:var(--bip-surface);text-decoration:none;color:var(--bip-ink-soft)}.bip-result:hover{border-color:var(--bip-primary)}.bip-result__score{color:var(--bip-muted);font-size:12px;white-space:nowrap}.bip-article{max-width:1480px}.bip-article h1{font-family:var(--bip-serif);font-weight:600;font-size:clamp(28px,4.4vw,40px);line-height:1.12;letter-spacing:-.02em;margin:0 0 20px}.bip-article h2{font-family:var(--bip-serif);font-size:24px;margin:36px 0 10px}.bip-article h3{font-size:18px;margin:26px 0 8px}.bip-article p{color:var(--bip-ink-soft);line-height:1.7}.bip-quote{border-left:3px solid var(--bip-primary);margin:16px 0;padding:4px 16px;color:var(--bip-muted);font-style:italic}.bip-pre{background:#0f1117;color:#e7e9f1;padding:16px;border-radius:12px;overflow-x:auto;font-family:var(--bip-mono);font-size:13.5px;line-height:1.6}.bip-img{max-width:100%;border-radius:12px}.bip-diagram{margin:22px 0;padding:20px;background:var(--bip-surface);border:1px solid var(--bip-border);border-radius:14px;overflow-x:auto;text-align:center}.bip-diagram svg{max-width:100%;height:auto}.bip-diagram__loading{color:var(--bip-muted);font-size:14px}.bip-diagram--error{text-align:left;padding:0;border:0;background:transparent}.bip-diagram--error figcaption{color:var(--bip-muted);font-size:13px;margin-top:6px}.bip-media{margin:22px 0}.bip-article .bip-media{max-width:none;margin:12px 0 16px}.bip-article .bip-img{width:100%;height:auto;display:block;border:1px solid var(--bip-border);background:var(--bip-surface);box-shadow:var(--bip-shadow-xs)}.bip-split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);grid-template-areas:"heading figure" "rest figure";column-gap:36px;row-gap:10px;align-items:start;margin:28px 0 36px}.bip-article>h1+.bip-split{margin-top:8px}.bip-split>:is(h2,h3,h4,h5,h6){grid-area:heading;margin-top:0}.bip-split>.bip-media{grid-area:figure;width:100%;max-width:none;margin:0;position:static;align-self:start}.bip-split>.bip-media .bip-img{width:100%;height:auto}.bip-split__rest{grid-area:rest;min-width:0}.bip-split__rest>:first-child{margin-top:4px}@media(max-width:900px){.bip-split{grid-template-columns:1fr;grid-template-areas:"heading" "figure" "rest"}}.bip-media figcaption{margin-top:8px;color:var(--bip-muted);font-size:14px;text-align:center}.bip-video{width:100%;border-radius:12px;background:#000}.bip-pdf{margin:28px 0 32px;border:1px solid var(--bip-border);border-radius:var(--bip-radius-md);background:var(--bip-surface);box-shadow:var(--bip-shadow-xs);overflow:hidden}.bip-pdf--page{margin:0;display:flex;flex-direction:column;min-height:calc(100vh - 168px)}.bip-pdf__header{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px 20px;padding:14px 16px 12px;border-bottom:1px solid var(--bip-border);background:var(--bip-surface-2)}.bip-pdf__titles{min-width:0;flex:1 1 240px}.bip-pdf__title{margin:0;font-family:var(--bip-serif);font-size:18px;font-weight:600;line-height:1.35;letter-spacing:0;color:var(--bip-ink)}.ns-main .bip-pdf__title{font-size:18px;margin:0;letter-spacing:0}.bip-pdf--page .bip-pdf__title,.ns-main .bip-pdf--page .bip-pdf__title{font-size:26px}.bip-pdf__meta{margin:6px 0 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var(--bip-focus);outline-offset:1px;border-color:var(--bip-primary)}.bip-auth__submit{margin-top:4px;border:0;border-radius:var(--bip-radius-sm);padding:12px 16px;font-weight:700;font-size:15px;color:#fff;background:var(--bip-grad);cursor:pointer}.bip-auth__submit:disabled{opacity:.6;cursor:not-allowed}.bip-auth__links{display:flex;justify-content:space-between;gap:12px;margin-top:18px;font-size:14px;flex-wrap:wrap}.bip-auth__links a{color:var(--bip-primary);text-decoration:none}.bip-auth__link-btn{background:none;border:0;color:var(--bip-primary);cursor:pointer;font:inherit;padding:0}.bip-auth__note{color:var(--bip-ink-soft);font-size:15px}.bip-auth__alert{margin:0;padding:10px 12px;border-radius:var(--bip-radius-sm);font-size:14px}.bip-auth__alert--error{background:#fdecec;color:#a3261f;border:1px solid #f5c6c2}.bip-auth__alert--info{background:var(--bip-primary-tint);color:var(--bip-primary-strong);border:1px solid #c9cdfb}.bip-activity__section{font-size:15px;text-transform:uppercase;letter-spacing:.06em;color:var(--bip-muted);margin:28px 0 12px}.bip-activity__item--event{border-left:3px solid var(--bip-primary)}.bip-admin__table{width:100%;border-collapse:collapse;margin-top:16px;font-size:14px}.bip-admin__table th,.bip-admin__table td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--bip-border);vertical-align:top}.bip-admin__table th{color:var(--bip-muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em}.bip-admin__table a{color:var(--bip-primary)}.bip-badge{display:inline-block;padding:2px 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