:root{--accent-color:#2563eb;--bg-quote:#eff6ff;--lib-paper:#fff;--lib-accent:var(--accent-color,#2563eb);--lib-bg:#fafbfc;--lib-ink:#243447;--lib-muted:#687586;--lib-line:#e3e7ed;--site-time-font:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;--site-time-size:11px}.bg-white, header{background-color:#ffffff !important;border:1px solid #cbd5e1 !important;border-radius:16px !important;box-shadow:0 4px 20px -2px rgba(37, 99, 235, 0.06), 0 2px 6px -1px rgba(30, 41, 59, 0.04) !important;transition:all 0.2s ease !important}header{border-radius:0 0 20px 20px !important;border-top:none !important;border-left:none !important;border-right:none !important;box-shadow:0 4px 20px -2px rgba(30, 41, 59, 0.05) !important;margin-bottom:2rem}input[type=number]::-webkit-inner-spin-button, input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}input[type=number]{-moz-appearance:textfield}::-webkit-calendar-picker-indicator{background:transparent;bottom:0;color:transparent;cursor:pointer;height:auto;left:auto;position:absolute;right:0;top:0;width:auto}iframe, img, video, object, embed{max-width:100% !important;height:auto;border-radius:12px;border:1px solid #cbd5e1}main iframe{width:100% !important;min-height:400px;max-height:600px}@media (max-width: 640px){main iframe{height:350px !important}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif!important;overflow-wrap:break-word;background:var(--lib-bg)!important;color:var(--lib-ink)!important}a, button, input, textarea, select, summary{-webkit-tap-highlight-color:transparent}button, a, input, select, textarea{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible{outline:3px solid #8ab4ff;outline-offset:3px}h1, h2, h3, p{margin-top:0}.lib-container{width:min(1240px,100%);padding:0 28px 56px;margin:0 auto;flex:1;min-width:0}.lib-skip{position:fixed;top:-80px;left:12px;z-index:999;background:#fff;padding:12px}.lib-skip:focus{top:10px}.lib-site-header{background:var(--lib-paper)!important;border:0!important;border-bottom:1px solid var(--lib-line)!important;border-radius:0!important;box-shadow:none!important;margin:0 0 28px!important;position:relative;z-index:45}.lib-header-inner{margin:auto;display:flex;align-items:center}.lib-brand{display:flex;align-items:center;gap:11px;flex-shrink:0;color:var(--lib-ink);font-weight:800}.lib-brand-icon{background:var(--lib-accent);color:#fff;display:grid;place-items:center}.lib-header-search{display:flex;align-items:center;margin-left:auto;flex:1;min-width:0;background:var(--lib-bg);border:1px solid var(--lib-line);overflow:hidden}.lib-header-search input{width:100%;min-width:0;background:transparent;border:0;padding:12px;font-size:13px}.lib-header-search button{width:44px;min-height:44px;font-size:26px;color:var(--lib-ink);flex-shrink:0}.lib-account{display:flex;align-items:center;gap:18px;font-weight:600;flex-shrink:0}.lib-account details{position:relative}.lib-account summary{list-style:none;cursor:pointer;padding:12px 0}.lib-account-menu{position:absolute;right:0;top:100%;background:var(--lib-paper);border:1px solid var(--lib-line);padding:8px;width:210px;z-index:60}.lib-account-menu a, .lib-account-menu button{display:block;text-align:left;padding:11px;width:100%;font-size:13px;border-radius:6px}.lib-account-menu a:hover, .lib-account-menu button:hover{background:var(--lib-bg)}.lib-main-nav{overflow-x:auto}.lib-main-nav>div{margin:auto;display:flex;white-space:nowrap}.lib-main-nav a{display:block;border-bottom:3px solid transparent;font-weight:600}.lib-main-nav a[aria-current=page]{border-color:var(--lib-accent);color:var(--lib-accent)}.lib-eyebrow{font-size:10px;font-weight:800;letter-spacing:2.4px;color:var(--lib-accent);display:block;margin-bottom:16px}.lib-button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;border:1px solid var(--lib-accent);background:var(--lib-accent);color:#fff!important;line-height:1.5;text-align:center;text-decoration:none;white-space:normal;transition:filter .15s}.lib-button:hover{filter:brightness(.94)}.lib-button-secondary{color:var(--lib-ink)!important;border-color:var(--lib-line)}.lib-button-danger{background:#fff3f3;color:#a52c3b!important;border-color:#f5cfd4}.lib-section{min-width:0}.lib-section-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.lib-section-heading h2{margin:0;font-size:21px;font-weight:750;letter-spacing:-.6px}.lib-section-heading small{font-size:12px;color:var(--lib-muted);font-weight:500;margin-left:6px}.lib-section-heading>a{font-weight:650;color:var(--lib-accent)}.lib-catalog-layout{grid-template-columns:215px minmax(0,1fr);gap:28px;align-items:start}.lib-catalog-results{min-width:0}.lib-catalog-results>.lib-section:first-child{margin-top:0}.lib-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.lib-catalog-results .lib-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lib-card{display:flex;flex-direction:column;border:1px solid var(--lib-line);background:var(--lib-paper);min-width:0;position:relative}.lib-card:hover{transform:translateY(-3px);box-shadow:0 10px 25px #203f5910}.lib-card-top{display:flex;align-items:center;justify-content:space-between;gap:8px}.lib-type{font-weight:800;color:var(--lib-accent);text-transform:uppercase}.lib-muted{font-size:11px;color:var(--lib-muted);line-height:1.7}.lib-card h3, .lib-card h2{font-size:17px;font-weight:750;letter-spacing:-.3px;line-height:1.5;margin:0 0 12px}.lib-card p{color:var(--lib-muted);display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden}.lib-card-bottom{display:flex;justify-content:space-between;gap:10px;align-items:center;border-top:1px solid var(--lib-line);color:var(--lib-muted);margin-top:auto;flex-wrap:wrap}.lib-card-bottom a{color:var(--lib-accent);font-weight:700}.lib-tags{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 16px}.lib-chip{display:inline-flex;padding:5px 8px;font-size:10px;background:var(--lib-bg);border:1px solid var(--lib-line);border-radius:5px;line-height:1.3}.lib-pdf-cover{height:135px;margin:-4px 0 18px;border-radius:7px;background:#edf2fa;display:flex;align-items:center;justify-content:center;flex-direction:column;overflow:hidden;color:#3c618e}.lib-pdf-cover>span{font-size:34px;font-weight:800;letter-spacing:-1px;border-bottom:2px solid #c9d8eb}.lib-pdf-cover small{font-size:9px;letter-spacing:1.4px;margin-top:7px}.lib-pdf-cover img{width:100%;height:100%;object-fit:cover}.lib-empty{padding:40px 24px;text-align:center;border:1px dashed #c5d1df;border-radius:10px;color:var(--lib-muted);font-size:13px;line-height:1.8}.lib-empty h2, .lib-empty h3{color:var(--lib-ink);font-size:18px}.lib-page-heading h1{font-weight:800}.lib-page-heading p{color:var(--lib-muted)}.lib-panel{background:var(--lib-paper);border:1px solid var(--lib-line);padding:26px;border-radius:10px;margin:20px 0}.lib-panel>h2, .lib-panel>h3{font-weight:750;letter-spacing:-.5px}.lib-panel>p{font-size:13px;line-height:1.8;color:var(--lib-muted)}.lib-field{display:flex;flex-direction:column;gap:7px;min-width:0;font-weight:550}.lib-field>span{color:var(--lib-muted)}.lib-field input, .lib-field select, .lib-field textarea, .lib-inline>input, .lib-inline>select, .lib-tools select, .lib-report textarea{width:100%;min-width:0;min-height:44px;padding:11px 12px;border:1px solid #ccd6e2;border-radius:7px;background:var(--lib-paper);color:var(--lib-ink);font:inherit;font-size:13px}.lib-field textarea{resize:vertical;min-height:80px}.lib-field input[type=file]{font-size:11px;padding:10px;max-width:100%}.lib-field input[type=color]{padding:4px;max-width:100px}.lib-form{display:flex;flex-direction:column;align-items:stretch;gap:20px}.lib-form>.lib-button{align-self:flex-start}.lib-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.lib-inline{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.lib-inline>input, .lib-inline>select{width:auto;flex:1}.lib-check{display:flex;gap:10px;align-items:center;font-size:12px;min-height:36px}.lib-check input{width:18px;height:18px;flex-shrink:0}.lib-link{color:var(--lib-accent);font-size:12px;text-decoration:underline;min-height:36px;padding:5px 2px}.lib-notice{border:1px solid #c9dbee;background:#eff6ff;color:#24476f;padding:15px 18px;border-radius:8px;font-size:13px;line-height:1.7;margin:20px 0}.lib-pagination{display:flex;justify-content:center;gap:24px;align-items:center;margin:30px 0;font-size:12px}.lib-pagination a{padding:12px;border:1px solid var(--lib-line);border-radius:7px;background:var(--lib-paper)}.lib-similar{display:flex;flex-direction:column;gap:10px;font-size:12px}.lib-similar:empty{display:none}.lib-similar a{color:var(--lib-accent);text-decoration:underline}.lib-breadcrumb{display:flex;flex-wrap:wrap;gap:9px;font-size:11px;color:var(--lib-muted);margin:10px 0 24px}.lib-article{background:var(--lib-paper);border:1px solid var(--lib-line)}.lib-article-heading{background:none!important;border:0!important;border-radius:0!important;box-shadow:none!important;margin:0 0 22px!important;padding:0!important;position:static!important}.lib-article h1{font-weight:800;margin-bottom:20px}.lib-byline{font-size:12px;color:var(--lib-muted)}.lib-tools{display:flex;flex-wrap:wrap;gap:10px;border-top:1px solid var(--lib-line);border-bottom:1px solid var(--lib-line);margin-bottom:30px;align-items:center}.lib-tools form{margin:0}.lib-tools select{width:auto;max-width:180px}.lib-report{position:relative;font-size:11px;margin-left:auto}.lib-report summary{cursor:pointer;min-height:36px;display:flex;align-items:center}.lib-report form{right:0;top:100%;z-index:10;background:var(--lib-paper);padding:18px;border:1px solid var(--lib-line);border-radius:8px}.lib-report label{font-size:12px;display:block}.lib-report textarea{margin:10px 0}.lib-prose{color:var(--lib-ink);overflow-wrap:anywhere}.lib-prose p{margin-bottom:1.2em}.lib-prose h1, .lib-prose h2, .lib-prose h3, .lib-prose h4, .lib-prose h5, .lib-prose h6{font-weight:750;line-height:1.4;margin:1.7em 0 .8em;scroll-margin-top:25px}.lib-prose ul, .lib-prose ol{padding-left:25px;margin:16px 0}.lib-prose ul{list-style:disc}.lib-prose ol{list-style:decimal}.lib-prose a{color:var(--lib-accent);text-decoration:underline}.lib-prose img{max-width:100%;height:auto;border-radius:8px;margin:20px auto}.lib-prose blockquote{border-left:3px solid var(--lib-accent);padding:14px 20px;background:var(--lib-bg);margin:24px 0}.lib-prose pre{overflow-x:auto;max-width:100%;padding:20px;background:#192b40;color:#ecf4ff;border-radius:8px}.lib-article-image, .lib-question-image{max-width:100%;max-height:650px;object-fit:contain;border-radius:8px;margin:20px auto;display:block}.lib-toc{border:1px solid var(--lib-line);margin:25px 0}.lib-toc summary{font-size:13px;font-weight:700;cursor:pointer}.lib-toc nav{display:flex;flex-direction:column;gap:11px;margin-top:17px;font-size:12px}.lib-toc-sub{padding-left:17px;color:var(--lib-muted)}.lib-pdf-summary{display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding:24px 0;border-bottom:1px solid var(--lib-line);margin-bottom:24px}.lib-pdf-summary>div:nth-child(2){flex:1}.lib-pdf-summary strong{font-size:14px}.lib-pdf-summary p{font-size:12px;color:var(--lib-muted);margin:7px 0 0}.lib-pdf-icon{display:grid;place-items:center;background:#edf2fa;color:#426ba5;font-weight:800;font-size:15px;width:56px;height:70px;border-radius:7px}.lib-pdf-frame{width:100%;height:650px;max-width:100%;border:1px solid var(--lib-line);border-radius:8px;margin:16px 0;background:#eceff3}.lib-panel summary{font-size:14px;font-weight:650;cursor:pointer;line-height:1.7}.lib-panel[open]>summary{margin-bottom:20px}.lib-answer{background:var(--lib-paper);border:1px solid var(--lib-line);border-radius:10px;padding:26px;margin:16px 0}.lib-answer-accepted{border-color:#8abda4;background:#f7fcf8}.lib-answer-accepted .lib-type{color:#217b50;display:block;margin-bottom:15px}.lib-reference{background:var(--lib-bg);border:1px solid var(--lib-line);padding:16px;border-radius:8px;font-size:12px;line-height:1.8}.lib-reference a{color:var(--lib-accent);text-decoration:underline}.lib-solution-state{font-size:12px;font-weight:700;color:#217b50}.lib-small-form{margin:8px 0}.lib-admin{max-width:1400px;min-width:0}.lib-admin h2{font-weight:750;margin-bottom:18px}.lib-admin-nav{display:flex;flex-wrap:wrap}.lib-admin-nav a{background:var(--lib-paper);border:1px solid var(--lib-line)}.lib-admin .lib-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lib-table-wrap{overflow-x:auto;border:1px solid var(--lib-line);border-radius:9px;background:var(--lib-paper);max-width:100%}.lib-table-wrap table{width:100%;border-collapse:collapse;font-size:12px;min-width:580px}.lib-table-wrap th, .lib-table-wrap td{padding:16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--lib-line)}.lib-table-wrap th{font-size:10px;letter-spacing:.8px;color:var(--lib-muted);background:var(--lib-bg)}.lib-table-wrap td a{color:var(--lib-accent);font-weight:600}.lib-taxonomy-row{padding:18px 0;border-top:1px solid var(--lib-line)}.lib-revision{border-top:1px solid var(--lib-line);padding:15px 0}.lib-revision summary{font-size:11px}.lib-revision pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:11px;max-height:400px;overflow-y:auto;background:var(--lib-bg);padding:15px}.lib-admin .lib-panel{margin-top:0}#mobileSidebar+div{min-width:0}details[hidden]{display:none!important}#site-content{display:block;height:0;scroll-margin-top:20px}body>div.flex-1{min-width:0}@media(min-width:1400px){.lib-catalog-results .lib-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:1000px){.lib-header-inner{gap:18px}.lib-brand{font-size:15px}.lib-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lib-account{gap:10px}.lib-account .lib-button{padding:9px 13px}}@media(max-width:800px){.lib-container{padding:0 18px 36px}.lib-header-search{margin:0}.lib-account{margin-left:auto}.lib-catalog-layout{grid-template-columns:1fr;gap:20px;margin-top:24px}.lib-catalog-results .lib-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lib-tools .lib-report{margin-left:0}.lib-admin .lib-grid{grid-template-columns:1fr}.lib-pdf-frame{height:500px}.lib-article h1{font-size:31px}.lib-prose{font-size:15px}.lib-card{padding:20px}.lib-section-heading h2{font-size:20px}}@media(max-width:520px){.lib-brand{gap:8px}.lib-account{font-size:11px}.lib-form-grid{grid-template-columns:1fr}.lib-card h3{font-size:18px}.lib-article-heading .lib-tags{gap:5px}.lib-pdf-frame{height:420px}.lib-pdf-summary{gap:13px}.lib-pdf-summary>.lib-button{width:100%}.lib-answer{padding:22px 18px}.lib-tools>.lib-button, .lib-tools>form{flex-grow:1}.lib-tools form .lib-button{width:100%}.lib-tools .lib-inline{width:100%}.lib-tools select{max-width:none;flex:1;min-width:0}.lib-tools .lib-inline .lib-button{width:auto}.lib-main-nav a{font-size:12px}.lib-section-heading{gap:10px}.lib-section-heading h2{font-size:20px}.lib-admin-nav{gap:5px}.lib-detail{padding:0 12px 30px}.lib-page-heading{padding-top:18px}}@media print{body{background:#fff!important;color:#111!important;font-size:12pt}.print-hide, .lib-site-header, body>footer, .lib-detail>.lib-section, .lib-skip, .lib-notice{display:none!important}.lib-container, .lib-detail{width:100%;max-width:none;padding:0;margin:0}.lib-article{box-shadow:none}.lib-prose{color:#111;font-size:12pt}.lib-prose a{color:inherit}img{break-inside:avoid}h2, h3{break-after:avoid}.lib-article-heading{display:block!important}.lib-article-heading .lib-tags{display:none}.lib-byline{color:#444}.lib-answer{break-inside:avoid}.lib-pdf-frame{display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*, *::before, *::after{transition:none!important;animation:none!important}}.lib-main-nav{scrollbar-width:none}.lib-main-nav::-webkit-scrollbar{display:none}.lib-container{max-width:1120px;padding-bottom:32px}.lib-detail{max-width:930px}.lib-narrow{max-width:850px}.lib-site-header{margin-bottom:20px!important}.lib-header-inner{max-width:1120px;padding:18px 28px;gap:22px}.lib-brand{font-size:17px;letter-spacing:-.3px}.lib-brand-icon{width:35px;height:37px;border-radius:6px}.lib-main-nav{overflow:visible;border-top:0}.lib-main-nav>div{max-width:1120px;gap:26px;padding:0 28px;align-items:center;flex-wrap:wrap}.lib-main-nav a{font-size:12px;padding:11px 0;min-height:42px;border-bottom-width:2px}.lib-main-nav .lib-more-nav{margin-left:auto;position:relative;font-size:12px}.lib-more-nav summary{cursor:pointer;padding:12px 5px;list-style:none}.lib-more-nav>div{display:flex;flex-direction:column;position:absolute;right:0;top:100%;width:195px;background:var(--lib-paper);border:1px solid var(--lib-line);padding:8px;border-radius:6px;z-index:70;box-shadow:0 8px 18px #172b4210}.lib-more-nav a{padding:10px!important;border:0!important;white-space:normal}.lib-header-search{max-width:330px;border-radius:6px}.lib-account{font-size:12px}.lib-account .lib-button{padding:8px 13px;min-height:38px}.lib-account-menu{border-radius:6px;box-shadow:0 8px 18px #172b4210}.lib-catalog-layout{display:block;margin-top:15px}.lib-field{font-size:11px}.lib-field input, .lib-field textarea, .lib-field select{border-color:var(--lib-line);border-radius:5px}.lib-grid, .lib-catalog-results .lib-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.lib-card{padding:19px;border-radius:6px;box-shadow:none!important;transform:none!important;transition:border-color .15s}.lib-card:hover{border-color:#bcc9db}.lib-card-top{margin-bottom:10px}.lib-card h2, .lib-card h3{font-size:16px;line-height:1.5;letter-spacing:-.2px;margin-bottom:8px}.lib-card p{font-size:12px;line-height:1.75;margin-bottom:12px;-webkit-line-clamp:2}.lib-card-bottom{font-size:10px;padding-top:12px}.lib-card .lib-tags{margin-bottom:11px;gap:4px}.lib-card .lib-chip{padding:3px 6px;background:transparent;font-size:9px;border-color:var(--lib-line)}.lib-card .lib-pdf-cover{display:none}.lib-type{letter-spacing:.3px;font-size:10px}.lib-section{margin:23px 0 32px}.lib-section-heading{margin-bottom:14px}.lib-section-heading h2, .lib-section>h2{font-size:19px;letter-spacing:-.3px;font-weight:700}.lib-section-heading>a{font-size:11px}.lib-page-heading{padding:17px 0 12px}.lib-page-heading .lib-eyebrow{display:none}.lib-page-heading h1{font-size:28px;letter-spacing:-.5px;margin-bottom:12px;line-height:1.4}.lib-page-heading p{font-size:13px;line-height:1.75}.lib-panel, .lib-answer{padding:22px;border-radius:6px;box-shadow:none}.lib-panel>h2, .lib-panel>h3{font-size:18px}.lib-button{border-radius:5px;font-size:12px;font-weight:650;padding:10px 15px}.lib-button-secondary{background:transparent}.lib-article{padding:30px 38px;border-radius:6px}.lib-article h1{font-size:30px;line-height:1.4;letter-spacing:-.6px;margin:10px 0 12px}.lib-article-heading{margin-bottom:10px!important}.lib-byline:empty{display:none}.lib-byline{margin:0}.lib-tools{margin:14px 0 25px;padding:12px 0}.lib-tools .lib-button{font-size:11px;padding:8px 11px;min-height:36px}.lib-tools select{min-height:36px;padding:8px;font-size:11px}.lib-prose{font-size:16px;line-height:1.85}.lib-prose h1{font-size:29px}.lib-prose h2{font-size:23px}.lib-prose h3{font-size:20px}.lib-prose h4{font-size:18px}.lib-prose h5{font-size:17px}.lib-prose h6{font-size:16px}.lib-prose :is(h1,h2,h3,h4,h5,h6) :is(span,font,strong,b,em,i,a,u,s,mark){font-size:inherit!important}.lib-prose table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;font-size:14px;margin:20px 0}.lib-prose td, .lib-prose th{border:1px solid var(--lib-line);padding:10px;min-width:70px}.lib-prose th{background:var(--lib-bg);text-align:left}.lib-toc{padding:15px 18px;border-radius:5px;background:var(--lib-bg)}.lib-site-footer{width:100%;border-top:1px solid var(--lib-line);padding:25px max(28px,calc((100vw - 1064px)/2));display:flex;align-items:flex-start;justify-content:space-between;gap:30px;background:var(--lib-paper);font-size:12px;margin-top:auto}.lib-site-footer strong{font-size:13px;font-weight:650}.lib-site-footer p{font-size:11px;color:var(--lib-muted);margin:7px 0}.lib-site-footer small{font-size:10px;color:var(--lib-muted)}.lib-site-footer nav{display:flex;gap:18px;flex-wrap:wrap;font-size:11px;line-height:1.8}.lib-auth{max-width:490px;padding-top:20px;padding-bottom:35px}.lib-auth h1{font-size:25px;font-weight:750;margin-bottom:10px}.lib-auth .lib-panel>p{font-size:12px}.lib-auth .lib-form{margin-top:22px}.lib-auth .lib-button{width:100%}.lib-auth-switch{border-top:1px solid var(--lib-line);padding-top:19px;margin:22px 0 0;font-size:12px}.lib-auth-switch a{color:var(--lib-accent);font-weight:650}.lib-profile-heading{display:flex;align-items:center;gap:18px;margin-bottom:22px}.lib-profile-heading h1{font-size:27px;line-height:1.4;margin-bottom:8px;font-weight:750}.lib-profile-avatar{width:72px;height:72px;border-radius:50%;object-fit:cover}.lib-profile-about{border-top:1px solid var(--lib-line);padding-top:18px;margin:15px 0 20px;font-size:14px;line-height:1.8}.lib-profile-about h2{font-size:15px;font-weight:650}.lib-profile-edit{margin-top:20px;padding-top:18px;border-top:1px solid var(--lib-line)}.lib-profile-edit summary{font-size:12px;cursor:pointer}.lib-profile-edit .lib-form{margin-top:20px}.lib-feedback{text-align:center;margin:40px 0}.lib-feedback h1{font-size:27px;font-weight:750;margin-bottom:15px}.lib-feedback p{font-size:14px;line-height:1.8;margin-bottom:23px}.lib-community{max-width:930px}.lib-community .lib-page-heading{margin-bottom:5px}.lib-community .lib-panel{margin:16px 0}.lib-compose>summary{font-size:13px}.lib-post .lib-section-heading{margin:0 0 12px}.lib-post .lib-author{margin:0}.lib-post .lib-prose{font-size:14px}.lib-post-edit{margin-top:18px;border-top:1px solid var(--lib-line);padding-top:12px}.lib-post-edit summary{font-size:11px;cursor:pointer}.lib-post-edit .lib-form{margin-top:14px}.lib-chat-layout{display:grid;grid-template-columns:190px minmax(0,1fr);gap:20px;align-items:start}.lib-channel-list h2, .lib-chat h2{font-size:17px;font-weight:700}.lib-channel-list{padding:18px}.lib-channel-list>a{display:block;font-size:12px;padding:11px 8px;border-radius:4px}.lib-channel-list>a[aria-current=page]{background:var(--lib-bg);color:var(--lib-accent);font-weight:650}.lib-chat{min-width:0;padding:20px}.lib-chat-messages{max-height:500px;overflow-y:auto;overscroll-behavior:contain;padding:4px 4px 12px 0;min-height:150px}.lib-message{padding:15px 0;border-bottom:1px solid var(--lib-line)}.lib-message .lib-section-heading{gap:8px;margin-bottom:5px;font-size:11px}.lib-message .lib-prose{font-size:13px}.lib-message img{max-width:100%;max-height:330px;border-radius:4px;object-fit:contain;margin-top:8px}.lib-message .lib-muted{font-size:9px}.lib-chat-compose{padding-top:18px;gap:12px}.lib-chat-compose input[type=file]{min-width:0;max-width:100%;font-size:10px}.lib-lesson-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.lib-lesson h2{font-size:17px;font-weight:700;line-height:1.6}.lib-lesson .lib-prose{font-size:13px;margin-bottom:18px}.lib-lesson-state{font-size:10px;color:var(--lib-muted)}.lib-lesson-state.is-live{color:#167847}.lib-enrollments{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 22px}.lib-page-row{display:flex;gap:15px;flex-wrap:wrap;align-items:center;padding:14px 0;border-bottom:1px solid var(--lib-line);font-size:12px}.lib-page-row>a:first-child{font-weight:650}.lib-page-row .lib-muted{flex:1}.lib-admin-shell .bg-white{border-radius:6px!important;box-shadow:none!important;border-color:var(--lib-line)!important}.lib-admin-shell header{border-radius:0!important;box-shadow:none!important;margin-bottom:0!important}.lib-admin-nav{gap:6px;margin-bottom:20px}.lib-admin-nav a{padding:8px 10px;font-size:10px;min-height:34px;border-radius:4px}.lib-admin .lib-panel{padding:22px}.lib-admin .lib-form{gap:17px}.lib-admin h2{font-size:21px}.lib-admin .lib-table-wrap{border-radius:5px}.lib-admin-shell #mobileSidebar{background:#223347!important}.lib-admin-shell #mobileSidebar nav{font-size:12px}.lib-admin-shell #mobileSidebar nav>a{padding-top:9px;padding-bottom:9px}.lib-admin-shell .lib-grid{gap:16px}.lib-admin-shell main{min-width:0}.lib-article .lib-pdf-frame{height:600px!important}@media(max-width:800px){.lib-container{padding-left:18px;padding-right:18px}.lib-header-inner{padding:14px 18px;gap:12px;flex-wrap:wrap}.lib-brand{font-size:15px}.lib-account{font-size:11px}.lib-header-search{order:3;max-width:none;flex-basis:100%}.lib-main-nav>div{gap:21px;padding:0 18px;flex-wrap:wrap}.lib-main-nav a{font-size:11px;white-space:nowrap}.lib-main-nav .lib-more-nav{margin-left:0}.lib-main-nav .lib-more-nav summary{font-size:11px}.lib-grid, .lib-catalog-results .lib-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lib-article{padding:25px}.lib-site-footer{padding:23px 18px;flex-direction:column;gap:16px}.lib-chat-layout{grid-template-columns:1fr;gap:0}.lib-channel-list{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.lib-channel-list h2{font-size:13px;width:100%;margin-bottom:5px}.lib-channel-list>a{padding:8px;font-size:11px}.lib-lesson-list{gap:0}.lib-article .lib-pdf-frame{height:470px!important}}@media(max-width:520px){.lib-brand{font-size:14px}.lib-brand-icon{width:30px;height:33px}.lib-account{gap:9px}.lib-account .lib-button{padding:7px 10px;min-height:35px;font-size:10px}.lib-header-inner{gap:10px}.lib-main-nav>div{padding:0 15px;justify-content:space-between}.lib-main-nav a, .lib-main-nav .lib-more-nav summary{font-size:10px}.lib-main-nav .lib-more-nav{flex-shrink:0}.lib-main-nav .lib-more-nav>div{right:0}.lib-container{padding-left:15px;padding-right:15px}.lib-grid, .lib-catalog-results .lib-grid{grid-template-columns:1fr}.lib-card{padding:17px}.lib-card .lib-tags{margin-bottom:9px}.lib-page-heading h1{font-size:25px}.lib-page-heading p{font-size:12px}.lib-section{margin:19px 0 27px}.lib-section-heading h2, .lib-section>h2{font-size:18px}.lib-article{padding:21px 17px}.lib-article h1{font-size:25px}.lib-prose{font-size:15px}.lib-tools{gap:7px}.lib-tools .lib-button{font-size:10px;padding:7px 9px}.lib-panel{padding:19px}.lib-profile-avatar{width:56px;height:56px}.lib-profile-heading{gap:12px;align-items:flex-start}.lib-profile-heading h1{font-size:23px}.lib-profile-heading .lib-muted{font-size:10px}.lib-profile-about{font-size:13px}.lib-chat{padding:17px}.lib-chat-messages{max-height:420px}.lib-article .lib-pdf-frame{height:390px!important}.lib-admin-shell main{padding:16px!important}.lib-admin .lib-panel{padding:16px}.lib-admin-nav a{padding:7px 9px;font-size:9px}.lib-admin h2{font-size:19px}.lib-community .lib-lesson h2{font-size:16px}.lib-site-footer nav{gap:13px}.lib-auth{padding-top:12px}.lib-auth h1{font-size:23px}.lib-narrow .lib-feedback{margin-top:20px}}@media(max-width:350px){.lib-main-nav>div{gap:10px;padding:0 12px}.lib-main-nav a, .lib-main-nav .lib-more-nav summary{font-size:9px}.lib-brand{font-size:13px}.lib-header-inner{padding-left:13px;padding-right:13px}}@media print{.lib-site-footer, .lib-author-bio{display:none!important}.lib-article{padding:0;border:0}.lib-author{margin-bottom:15px}.lib-article h1{font-size:24pt}.lib-prose table{display:table;width:100%;overflow:visible}.lib-article .lib-pdf-frame{display:none!important}}.lib-admin-sidebar{padding:12px 15px;display:flex;flex-direction:column;gap:3px;font-size:12px}.lib-admin-sidebar>a, .lib-admin-sidebar details>a{display:block;padding:10px 13px;border-radius:4px;min-height:38px}.lib-admin-sidebar a:hover, .lib-admin-sidebar a[aria-current=page]{background:#ffffff14;color:#fff}.lib-admin-sidebar summary{padding:13px;font-size:11px;color:#aab9cd;cursor:pointer}.lib-admin-sidebar details>a{padding-left:22px;font-size:11px}.lib-admin-sidebar>details{margin-top:4px;border-top:1px solid #ffffff12}.lib-admin-shell input, .lib-admin-shell textarea, .lib-admin-shell select{border-radius:5px!important}.lib-admin-shell button{border-radius:5px!important}.lib-admin-shell .note-editor button{border-radius:4px!important}.lib-admin-tools{position:relative;margin-left:2px;font-size:11px}.lib-admin-tools>summary{cursor:pointer;padding:10px;min-height:36px}.lib-admin-tools>div{position:absolute;left:0;top:100%;width:205px;background:var(--lib-paper);border:1px solid var(--lib-line);border-radius:5px;padding:7px;z-index:60;box-shadow:0 8px 20px #172b4212}.lib-admin-tools a{display:block;border:0;background:none}.lib-admin-tools a:hover{background:var(--lib-bg)}.lib-admin-nav{align-items:center}.lib-lesson{min-width:0;overflow-wrap:anywhere}.lib-profile-heading>div{min-width:0;overflow-wrap:anywhere}.lib-page-row>span{min-width:0;overflow-wrap:anywhere}.lib-site-footer nav{min-width:0}.lib-site-footer a{min-width:0;max-width:100%;overflow-wrap:anywhere}.lib-report[open]{flex-basis:100%;width:100%;margin-left:0}.lib-report form{position:static;width:100%;box-shadow:none;margin-top:8px}.lib-site-footer p:empty{display:none}@media(max-width:800px){.lib-lesson-list{grid-template-columns:minmax(0,1fr)}}@media(max-width:520px){.lib-admin-tools>div{left:auto;right:0}.lib-admin-shell label{text-transform:none!important;font-weight:600!important;letter-spacing:normal!important}}.lib-contact-float{position:fixed;right:18px;bottom:18px;z-index:40;background:var(--lib-accent);color:#fff;padding:10px 15px;border-radius:5px;font-size:11px;border:1px solid #ffffff70}.lib-home-categories{margin:4px 0 25px}.lib-home-categories h1{font-size:17px;font-weight:650;margin:0 0 12px}.lib-home-category-links{align-items:start;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.lib-home-category-links a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;background:var(--lib-paper);border:1px solid var(--lib-line);border-radius:5px;font-size:13px;min-width:0;overflow-wrap:anywhere}.lib-home-category-links a:hover{border-color:var(--lib-accent);color:var(--lib-accent)}#topbar-cta{position:sticky;top:0;z-index:80;min-height:36px}#topbar-cta button{min-width:32px;min-height:32px}.lib-panel legend{font-size:13px;font-weight:650;padding:0 8px}@media(max-width:800px){.lib-home-category-links{grid-template-columns:repeat(2,minmax(0,1fr))}.lib-site-footer{align-items:center;text-align:center}.lib-site-footer>div{width:100%}.lib-site-footer nav{justify-content:center;width:100%}}@media(max-width:520px){.lib-home-category-links a{font-size:12px;padding:12px}.lib-home-categories{margin-bottom:20px}}@media(max-width:800px){body:has(.lib-contact-float) .lib-site-footer{padding-bottom:75px}}.lib-topic-tree{border:1px solid var(--lib-line);border-radius:10px;padding:0;background:var(--lib-paper);min-width:0;align-self:start;overflow:hidden}.lib-topic-tree>summary{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:17px 16px;min-height:76px;font-size:14px;font-weight:650;line-height:1.5;cursor:pointer;overflow-wrap:anywhere;list-style:none}.lib-topic-tree>summary::-webkit-details-marker{display:none}.lib-topic-tree>summary::after{content:"+";color:var(--lib-accent);font-size:20px;font-weight:400;flex-shrink:0}.lib-topic-tree[open]>summary::after{content:"−"}.lib-topic-tree[open]>summary{background:var(--lib-bg)}.lib-home-category-links .lib-topic-tree>a{display:block;margin:0 16px;padding:12px 0;background:transparent;border:0;border-top:1px solid var(--lib-line);border-radius:0;font-size:13px;line-height:1.5}.lib-home-category-links .lib-topic-tree>a:hover{color:var(--lib-accent);text-decoration:underline;text-underline-offset:3px}.curriculum-category summary{cursor:pointer;overflow-wrap:anywhere}.curriculum-heading{padding:18px 0;border-top:1px solid var(--lib-border,#dce3ec)}.curriculum-heading h3{margin:0;overflow-wrap:anywhere}.curriculum-heading .lib-inline{margin-top:14px;flex-wrap:wrap}.curriculum-heading li{overflow-wrap:anywhere}.lib-home-category-links .lib-topic-tree{width:100%}@media(max-width:600px){.curriculum-category .lib-panel{padding:12px}.curriculum-heading .lib-section-heading{align-items:flex-start;flex-direction:column}.lib-home-category-links{grid-template-columns:1fr}}.lib-home-categories{margin-top:20px}.lib-home-categories h1{line-height:1.4}.lib-main-nav .lib-more-nav>summary{display:flex;align-items:center;justify-content:center;gap:7px;min-height:36px;padding:8px 12px;border:1px solid var(--lib-line);border-radius:8px;background:var(--lib-paper);color:var(--lib-ink);font-weight:650;line-height:1.2;list-style:none;transition:background .15s,border-color .15s}.lib-more-nav>summary::-webkit-details-marker{display:none}.lib-main-nav .lib-more-nav>summary:hover, .lib-main-nav .lib-more-nav[open]>summary{background:var(--lib-bg);border-color:var(--lib-accent);color:var(--lib-accent)}.lib-more-chevron{transition:transform .15s}.lib-more-nav[open] .lib-more-chevron{transform:rotate(180deg)}.lib-more-nav>div{max-width:calc(100vw - 36px)}.lib-more-nav a:hover{background:var(--lib-bg);border-radius:5px}.lib-topic-tree>summary:focus-visible, .lib-more-nav>summary:focus-visible{outline:2px solid var(--lib-accent);outline-offset:-3px}@media(max-width:600px){.lib-topic-tree>summary{min-height:58px;padding:14px 16px}.lib-main-nav .lib-more-nav>summary{min-height:34px;padding:7px 10px}}@media(max-width:520px){.lib-main-nav>div{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:4px}.lib-main-nav>div>a{text-align:center;min-width:0}.lib-main-nav .lib-more-nav{min-width:0}.lib-main-nav .lib-more-nav>summary{gap:4px;padding:7px 6px}.lib-more-nav>summary>svg:first-child{display:none}}.lib-author{position:relative;margin:16px 0 22px;padding:16px;background:var(--lib-bg);border:1px solid var(--lib-line);border-radius:10px;min-width:0}.lib-author-line{display:flex;align-items:center;gap:12px;min-width:0}.lib-author.has-bio .lib-author-line{padding-right:145px}.lib-author-avatar{position:relative;display:grid;place-items:center;width:44px;height:44px;flex:0 0 44px;overflow:hidden;border-radius:50%;background:var(--lib-paper);border:1px solid var(--lib-line);color:var(--lib-accent);font-size:14px;font-weight:700}.lib-author-avatar img{position:absolute;inset:0;width:100%;height:100%;max-width:100%;object-fit:cover;border:0;border-radius:inherit}.lib-author-avatar img[hidden]{display:none!important}.lib-author-identity{min-width:0;display:grid;gap:3px}.lib-author-label{color:var(--lib-muted);font-size:10px;line-height:1.4}.lib-author-identity>a, .lib-author-name{color:var(--lib-ink);font-size:14px;font-weight:650;line-height:1.5;overflow-wrap:anywhere}.lib-author-identity>a:hover{color:var(--lib-accent);text-decoration:underline;text-underline-offset:3px}.lib-author-bio{margin:0;min-width:0}.lib-author-bio>summary{position:absolute;top:22px;right:16px;display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:7px 9px;border:1px solid var(--lib-line);border-radius:6px;background:var(--lib-paper);color:var(--lib-muted);cursor:pointer;font-size:11px;line-height:1.5;list-style:none}.lib-author-bio>summary::-webkit-details-marker{display:none}.lib-author-bio>summary:hover{color:var(--lib-accent);border-color:var(--lib-accent)}.lib-author-bio>summary svg{flex-shrink:0;transition:transform .15s}.lib-author-bio[open]>summary svg{transform:rotate(180deg)}.lib-author-about{padding-top:14px;margin-top:14px;border-top:1px solid var(--lib-line);color:var(--lib-muted);font-size:13px;line-height:1.8;overflow-wrap:anywhere}.lib-author-about p{margin:0}.lib-author-profile{display:inline-flex;align-items:center;gap:6px;margin-top:10px;color:var(--lib-accent);font-size:12px;font-weight:600}.lib-author-compact{margin:0;padding:0;border:0;background:transparent}.lib-author-compact .lib-author-avatar{width:36px;height:36px;flex-basis:36px;font-size:12px}.lib-author-compact .lib-author-label{display:none}.lib-author-compact .lib-author-identity>a{font-size:12px}@media(max-width:520px){.lib-author{padding:14px}.lib-author.has-bio .lib-author-line{padding-right:0}.lib-author-bio>summary{position:static;margin-top:12px;min-height:36px}.lib-author-about{margin-top:12px;padding-top:12px}.lib-author-compact{padding:0}}@media print{.lib-author{background:transparent;border:0;padding:0}.lib-author.has-bio .lib-author-line{padding-right:0}}#comments{scroll-margin-top:64px}details.lib-report > summary.lib-report-trigger{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:32px;padding:6px 10px;border:1px solid #efcbd4;border-radius:7px;background:transparent;color:#b42345;font-size:12px;font-weight:500;line-height:1.4;list-style:none;cursor:pointer;box-shadow:none}details.lib-report > summary.lib-report-trigger::-webkit-details-marker{display:none}details.lib-report > summary.lib-report-trigger:hover,
details.lib-report[open] > summary.lib-report-trigger{background:#fff1f4;border-color:#dda1b1}details.lib-report > summary.lib-report-trigger:focus-visible{outline:3px solid #fb7185;outline-offset:3px}.lib-report-trigger .lib-report-icon{display:inline-flex;align-items:center;justify-content:center;width:14px;height:14px;border:1px solid currentColor;border-radius:50%;font-size:10px}.lib-report .lib-report-submit{background:#be123c;border-color:#be123c;color:#fff}.lib-report .lib-report-submit:hover{background:#9f1239}.lib-admin .lib-answer-admin-head{display:flex;align-items:center;flex-wrap:wrap;gap:9px;margin-bottom:15px}.lib-admin .lib-answer-actions{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:17px;padding-top:14px;border-top:1px solid var(--lib-line)}.lib-admin .lib-answer-actions > .lib-button{min-height:36px;padding:7px 13px;border-radius:7px;font-size:12px;font-weight:600;line-height:1.4;margin:0}.lib-admin .lib-answer-actions > .lib-button:focus-visible{outline:2px solid var(--lib-accent);outline-offset:3px}@media (max-width: 540px){.lib-admin .lib-answer-actions > .lib-button{flex:1 1 auto;min-height:38px}.lib-admin .lib-answer-actions > .lib-answer-solution{flex-basis:100%}}time.site-time{display:inline-block;font-family:var(--site-time-font) !important;font-size:var(--site-time-size) !important;font-weight:400 !important;line-height:1.7 !important;color:var(--lib-muted) !important;letter-spacing:normal !important;font-variant-numeric:tabular-nums}.lib-article-heading > time.site-time{margin-top:10px}.lib-content-updated{margin:10px 0}@media (max-width: 800px){.lib-main-nav .lib-more-nav > div{position:fixed;top:var(--lib-more-menu-top, 130px);left:12px;right:12px;width:auto;min-width:0;max-width:none;max-height:calc(100vh - var(--lib-more-menu-top, 130px) - 12px);max-height:calc(100dvh - var(--lib-more-menu-top, 130px) - 12px);overflow-x:hidden;overflow-y:auto;overscroll-behavior:contain;z-index:1000;box-shadow:0 12px 34px #172b422a}.lib-main-nav .lib-more-nav > div a{white-space:normal;overflow-wrap:anywhere}}.lib-pdf-responsive{display:none;position:relative}@media (max-width: 720px){.lib-article .lib-pdf-frame,
  .lib-pdf-frame{display:block !important;width:100% !important;max-width:100% !important;height:68vh !important;height:68dvh !important;min-height:355px !important;max-height:none !important}.lib-article .lib-pdf-frame[data-pdf-fit="ready"]{display:none !important}.lib-pdf-responsive[data-ready="1"]{display:block;width:100%;max-width:100%;height:68vh;height:68dvh;min-height:355px;overflow:auto;overflow-x:hidden;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;margin:16px 0;padding:10px 7px;border:1px solid var(--lib-line);border-radius:8px;background:#e9edf2}.lib-pdf-responsive-page{width:100%;aspect-ratio:var(--pdf-page-ratio, 595 / 842);background:#fff;border:0;box-shadow:0 2px 7px #15243a24;margin:0 auto 11px;position:relative;overflow:hidden}.lib-pdf-responsive-page canvas{display:block;width:100%;height:100%;border:0;border-radius:0;max-width:100%;background:#fff}.lib-pdf-responsive-page:last-child{margin-bottom:0}}@media print{.lib-pdf-responsive{display:none !important}}.lib-topic-directory{margin-block:1.25rem}.lib-topic-directory details{border-top:1px solid #e2e8f0;padding:.6rem 0}.lib-topic-directory summary{cursor:pointer;font-weight:600}.lib-topic-directory ul{display:grid;gap:.45rem;margin:.75rem 0;padding-inline-start:1.5rem}.lib-topic-directory li a{overflow-wrap:anywhere;text-decoration:underline;text-underline-offset:2px}.lib-topic-guide{margin-block:18px;padding:clamp(18px, 3vw, 28px)}.lib-topic-guide h2{font-size:clamp(20px, 2.3vw, 25px);margin-bottom:12px}.lib-topic-guide h3{font-size:clamp(16px, 2vw, 19px);margin-top:22px;margin-bottom:8px}.lib-topic-guide p{max-width:84ch;line-height:1.75;margin-bottom:13px}.lib-home-intro h2{font-size:1.12rem;margin:1.25rem 0 .5rem;font-weight:700}.lib-grade-switch{display:flex;flex-wrap:wrap;gap:.55rem;margin:1rem 0}.lib-grade-switch .lib-chip{display:inline-flex;align-items:center;text-decoration:none}.lib-resource-paths{margin:1rem 0}.lib-resource-paths>a{display:inline-block;margin:.25rem .85rem .25rem 0;text-underline-offset:3px}.lib-grade-hub .lib-page-heading{margin-bottom:1.1rem}.lib-grade-hub .lib-section{margin:1.4rem 0}.lib-publisher{font-size:.8rem;line-height:1.6;max-width:39rem}.lib-breadcrumb{flex-wrap:wrap;overflow-wrap:anywhere}@media(max-width:640px){.lib-grade-switch .lib-chip{font-size:.9rem;max-width:100%;white-space:normal}.lib-home-intro h1{line-height:1.25}}
 .lib-home-refresh{margin:8px 0 36px;min-width:0}.lib-home-refresh .lib-home-hero{position:relative;padding:clamp(24px,3.5vw,42px);border:1px solid var(--lib-line);border-left:5px solid var(--lib-accent);border-radius:16px;background:var(--lib-paper);overflow:hidden}.lib-home-refresh .lib-home-hero .lib-eyebrow{margin-bottom:12px;font-size:11px;letter-spacing:2px}.lib-home-refresh .lib-home-hero h1{max-width:870px;margin:0 0 14px;font-size:clamp(25px,3.3vw,39px);font-weight:800;letter-spacing:-.035em;line-height:1.22;color:var(--lib-ink)}.lib-home-refresh .lib-home-hero p{max-width:900px;margin:0;font-size:clamp(14px,1.45vw,16px);line-height:1.75;color:var(--lib-muted)}.lib-home-refresh .lib-home-grades{margin:28px 0 0}.lib-home-refresh .lib-home-subheading{margin:0 0 14px;font-size:18px;line-height:1.35;font-weight:750;color:var(--lib-ink)}.lib-home-refresh .lib-home-grade-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.lib-home-refresh .lib-home-grade-link{display:flex;align-items:center;gap:11px;min-width:0;min-height:70px;padding:14px;border:1px solid var(--lib-line);border-radius:12px;background:var(--lib-paper);text-decoration:none;color:var(--lib-ink);transition:border-color .15s,background .15s}.lib-home-refresh .lib-home-grade-number{display:grid;place-items:center;width:40px;height:40px;flex:0 0 40px;border-radius:9px;background:var(--lib-bg);border:1px solid var(--lib-line);color:var(--lib-accent);font-size:19px;font-weight:750}.lib-home-refresh .lib-home-grade-label{min-width:0;flex:1;font-size:13px;line-height:1.4;font-weight:700}.lib-home-refresh .lib-home-link-arrow{flex:0 0 auto;font-size:19px;line-height:1;color:var(--lib-accent)}.lib-home-refresh .lib-home-grade-link:hover,.lib-home-refresh .lib-home-resource-link:hover{border-color:var(--lib-accent);background:var(--lib-bg)}.lib-home-refresh .lib-home-resource-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:16px 0 0}.lib-home-refresh .lib-home-resource-link{display:flex;align-items:center;gap:12px;min-width:0;min-height:63px;padding:14px 16px;border:1px solid var(--lib-line);border-radius:12px;background:var(--lib-paper);color:var(--lib-ink);text-decoration:none;transition:border-color .15s,background .15s}.lib-home-refresh .lib-home-resource-link svg{flex:0 0 23px;width:23px;height:23px;color:var(--lib-accent)}.lib-home-refresh .lib-home-resource-link>span:nth-child(2){flex:1;min-width:0;font-size:13px;line-height:1.45;font-weight:650}.lib-home-refresh .lib-home-topic-heading{margin:34px 0 16px}.lib-home-refresh .lib-home-topic-heading h2{margin:0 0 6px;font-size:clamp(20px,2.3vw,26px);font-weight:800;letter-spacing:-.025em;color:var(--lib-ink)}.lib-home-refresh .lib-home-topic-heading p{margin:0;max-width:820px;font-size:13px;line-height:1.7;color:var(--lib-muted)}.lib-home-refresh .lib-home-topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;align-items:start}.lib-home-refresh .lib-home-topic-grid .lib-topic-tree{width:100%;border:1px solid var(--lib-line);border-radius:12px;background:var(--lib-paper);overflow:hidden;transition:border-color .15s}.lib-home-refresh .lib-home-topic-grid .lib-topic-tree[open]{border-color:var(--lib-accent)}.lib-home-refresh .lib-home-topic-grid .lib-topic-tree>summary{display:flex;align-items:center;gap:12px;min-width:0;min-height:98px;padding:16px;cursor:pointer;list-style:none;color:var(--lib-ink)}.lib-home-refresh .lib-home-topic-grid .lib-topic-tree>summary::-webkit-details-marker{display:none}.lib-home-refresh .lib-home-topic-grid .lib-topic-tree>summary::after{content:"+";font-size:20px;font-weight:500;color:var(--lib-accent);margin-left:auto;flex:0 0 auto}.lib-home-refresh .lib-home-topic-grid .lib-topic-tree[open]>summary::after{content:"−"}.lib-home-refresh .lib-home-topic-grid .lib-topic-tree[open]>summary{background:var(--lib-bg)}.lib-home-refresh .lib-home-topic-icon{display:grid;place-items:center;width:38px;height:38px;flex:0 0 38px;border-radius:9px;background:var(--lib-bg);border:1px solid var(--lib-line);color:var(--lib-accent)}.lib-home-refresh .lib-home-topic-icon svg{width:22px;height:22px;max-width:100%;border:0;border-radius:0}.lib-home-refresh .lib-home-topic-name{min-width:0;flex:1;font-size:13px;line-height:1.45;font-weight:700;overflow-wrap:break-word}.lib-home-refresh .lib-home-topic-panel{padding:0 15px 10px}.lib-home-refresh .lib-home-topic-grid .lib-home-topic-panel>a{display:block;margin:0;padding:11px 0;border:0;border-top:1px solid var(--lib-line);border-radius:0;background:transparent;font-size:12px;line-height:1.5;color:var(--lib-ink);overflow-wrap:break-word}.lib-home-refresh .lib-home-topic-grid .lib-home-topic-panel>a:hover{color:var(--lib-accent);text-decoration:underline;text-underline-offset:3px}.lib-home-refresh a:focus-visible,.lib-home-refresh summary:focus-visible{outline:3px solid var(--lib-accent);outline-offset:2px}@media (max-width:920px){.lib-home-refresh .lib-home-grade-grid,.lib-home-refresh .lib-home-topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:680px){.lib-home-refresh{margin:0 0 28px}.lib-home-refresh .lib-home-hero{padding:23px 20px}.lib-home-refresh .lib-home-hero h1{font-size:clamp(23px,6vw,30px)}.lib-home-refresh .lib-home-grades{margin-top:24px}.lib-home-refresh .lib-home-subheading{font-size:17px}.lib-home-refresh .lib-home-grade-grid{gap:9px}.lib-home-refresh .lib-home-grade-link{gap:8px;min-height:62px;padding:10px}.lib-home-refresh .lib-home-grade-number{width:33px;height:33px;flex-basis:33px;font-size:16px}.lib-home-refresh .lib-home-grade-label{font-size:12px}.lib-home-refresh .lib-home-resource-grid{grid-template-columns:1fr;gap:9px;margin-top:14px}.lib-home-refresh .lib-home-resource-link{min-height:54px;padding:11px 14px}.lib-home-refresh .lib-home-topic-heading{margin-top:29px}.lib-home-refresh .lib-home-topic-grid{grid-template-columns:1fr;gap:9px}.lib-home-refresh .lib-home-topic-grid .lib-topic-tree>summary{min-height:62px;padding:11px 14px}.lib-home-refresh .lib-home-topic-name{font-size:13px}}@media (max-width:380px){.lib-home-refresh .lib-home-grade-link{gap:6px;padding:9px 8px}.lib-home-refresh .lib-home-link-arrow{font-size:16px}.lib-home-refresh .lib-home-grade-label{font-size:11px}}@media (prefers-reduced-motion:reduce){.lib-home-refresh .lib-home-grade-link,.lib-home-refresh .lib-home-resource-link,.lib-home-refresh .lib-home-topic-grid .lib-topic-tree{transition:none}}
.lib-unified-hero,.lib-home-refresh .lib-home-hero.lib-unified-hero{--lib-accent:#b91537;display:flex;align-items:center;justify-content:space-between;gap:clamp(16px,2.4vw,32px);min-height:285px;margin:8px 0 28px;padding:clamp(22px,2.8vw,36px);border:1px solid var(--lib-line);border-left:5px solid var(--lib-accent);border-radius:16px;background:var(--lib-paper);color:var(--lib-ink);overflow:hidden}.lib-unified-hero-copy{flex:1 1 55%;min-width:0;max-width:740px}.lib-unified-hero .lib-eyebrow,.lib-home-refresh .lib-unified-hero .lib-eyebrow{display:block;margin:0 0 12px;font-size:11px;letter-spacing:1.3px;font-weight:800;color:var(--lib-accent)}.lib-unified-hero h1,.lib-home-refresh .lib-home-hero.lib-unified-hero h1{font-size:clamp(25px,2.65vw,38px);line-height:1.18;letter-spacing:-.035em;font-weight:800;color:var(--lib-ink);margin:0 0 15px}.lib-unified-hero p,.lib-home-refresh .lib-home-hero.lib-unified-hero p{max-width:700px;margin:0;font-size:clamp(13px,1.2vw,16px);line-height:1.75;color:var(--lib-muted)}.lib-unified-hero-aside{display:flex;align-items:center;justify-content:flex-end;gap:clamp(12px,1.6vw,22px);flex:0 0 auto;max-width:45%}.lib-unified-paper{width:185px;flex:0 0 185px;padding:16px 17px;background:var(--lib-paper);border:1px solid color-mix(in srgb,var(--lib-accent) 22%,var(--lib-line));border-radius:13px;box-shadow:0 12px 25px #2733440b;transform:rotate(-3deg);color:var(--lib-ink)}.lib-unified-paper strong{display:block;margin:0 0 9px;padding:0 0 9px;border-bottom:1px solid var(--lib-line);font-size:10px;letter-spacing:1px;color:var(--lib-accent);line-height:1.4}.lib-unified-paper>span{display:flex;align-items:center;gap:9px;padding:6px 0;font-size:11px;line-height:1.3;white-space:nowrap}.lib-unified-paper b{display:grid;place-items:center;min-width:23px;height:23px;border-radius:6px;background:color-mix(in srgb,var(--lib-accent) 8%,var(--lib-paper));color:var(--lib-accent);font-size:10px}.lib-unified-paper small{display:block;padding-top:9px;border-top:1px solid var(--lib-line);margin-top:5px;text-align:right;font-size:9px;color:var(--lib-muted)}.lib-unified-actions{display:flex;flex-direction:column;gap:10px;width:190px;flex:0 0 190px}.lib-unified-actions a{display:flex;align-items:center;justify-content:center;min-height:46px;padding:11px 13px;border-radius:10px;font-size:12px;font-weight:750;line-height:1.45;text-align:center;text-decoration:none;overflow-wrap:anywhere}.lib-unified-primary{background:var(--lib-accent);border:1px solid var(--lib-accent);color:#fff!important}.lib-unified-secondary{border:1px solid color-mix(in srgb,var(--lib-accent) 42%,var(--lib-line));background:var(--lib-paper);color:var(--lib-accent)}.lib-unified-hero a:focus-visible{outline:3px solid var(--lib-accent);outline-offset:3px}.lib-home-refresh .lib-home-resource-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.lib-mobile-menu{display:none}@media(max-width:1100px){.lib-unified-paper{width:155px;flex-basis:155px;padding:13px}.lib-unified-actions{width:156px;flex-basis:156px}.lib-unified-paper>span{font-size:10px}}@media(max-width:920px){.lib-unified-hero,.lib-home-refresh .lib-home-hero.lib-unified-hero{align-items:stretch;gap:19px}.lib-unified-hero-aside{flex-direction:column;align-items:stretch;max-width:34%;justify-content:center}.lib-unified-paper{width:100%;flex:0 0 auto;max-width:210px;margin:0 auto}.lib-unified-actions{flex:0 0 auto;width:100%}.lib-home-refresh .lib-home-resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:900px){.lib-main-nav>div{display:none!important}.lib-main-nav{overflow:visible;padding:0 15px}.lib-mobile-menu{display:block;max-width:1240px;margin:0 auto;color:var(--lib-ink)}.lib-mobile-menu>summary{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:49px;padding:9px 12px;cursor:pointer;list-style:none;border:1px solid var(--lib-line);border-radius:10px;background:var(--lib-paper);font-size:14px;font-weight:750}.lib-mobile-menu>summary::-webkit-details-marker{display:none}.lib-mobile-menu-label{display:flex;align-items:center;gap:9px;min-width:0}.lib-mobile-menu-label small{font-size:11px;font-weight:500;color:var(--lib-muted);white-space:normal}.lib-mobile-menu-toggle{white-space:nowrap;font-size:12px;color:var(--lib-accent)}.lib-mobile-menu-close-label{display:none}.lib-mobile-menu[open] .lib-mobile-menu-open-label{display:none}.lib-mobile-menu[open] .lib-mobile-menu-close-label{display:inline}.lib-mobile-menu[open] .lib-mobile-menu-chevron{display:inline-block;transform:rotate(180deg)}.lib-mobile-menu-body{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;padding:11px 0 15px}.lib-mobile-menu-body>a,.lib-mobile-menu-extra>a{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 13px;min-width:0;min-height:46px;background:var(--lib-paper);border:1px solid var(--lib-line);border-radius:9px;font-size:12px;font-weight:650;line-height:1.4;white-space:normal;overflow-wrap:anywhere;text-decoration:none;color:var(--lib-ink)}.lib-mobile-menu-body>a>span,.lib-mobile-menu-extra>a>span{color:var(--lib-accent)}.lib-mobile-menu-body a[aria-current="page"]{border-color:var(--lib-accent);background:color-mix(in srgb,var(--lib-accent) 6%,var(--lib-paper));color:var(--lib-accent)}.lib-mobile-menu-extra{grid-column:1/-1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;padding-top:7px;border-top:1px solid var(--lib-line)}.lib-mobile-menu-extra strong{grid-column:1/-1;font-size:11px;letter-spacing:.5px;color:var(--lib-muted);margin:2px 0 3px}.lib-mobile-menu a:focus-visible,.lib-mobile-menu>summary:focus-visible{outline:3px solid var(--lib-accent);outline-offset:2px}}@media(max-width:680px){.lib-unified-hero,.lib-home-refresh .lib-home-hero.lib-unified-hero{flex-direction:column;min-height:0;gap:18px;padding:22px 19px;margin:8px 0 22px}.lib-unified-hero-copy{max-width:none}.lib-unified-hero h1,.lib-home-refresh .lib-home-hero.lib-unified-hero h1{font-size:clamp(24px,6.3vw,31px)}.lib-unified-hero-aside{display:grid;grid-template-columns:minmax(0,1fr) 124px;align-items:center;max-width:none;gap:12px}.lib-unified-paper{width:124px;grid-column:2;grid-row:1;padding:9px;transform:rotate(-2deg)}.lib-unified-paper strong{font-size:7px;margin-bottom:5px;padding-bottom:6px}.lib-unified-paper>span{gap:4px;font-size:8px;padding:3px 0}.lib-unified-paper b{min-width:18px;height:18px;font-size:7px}.lib-unified-paper small{font-size:7px;padding-top:5px}.lib-unified-actions{grid-column:1;grid-row:1;gap:8px}.lib-unified-actions a{min-height:44px;font-size:11px;padding:9px 8px}.lib-home-refresh .lib-home-resource-grid{grid-template-columns:1fr}.lib-mobile-menu-label small{display:none}}@media(max-width:350px){.lib-mobile-menu-body{grid-template-columns:1fr}.lib-mobile-menu-extra{grid-template-columns:1fr}.lib-unified-hero-aside{grid-template-columns:minmax(0,1fr) 104px}.lib-unified-paper{width:104px;padding:7px}.lib-unified-paper strong{font-size:6px}.lib-unified-paper>span{font-size:7px}.lib-unified-paper b{min-width:15px;height:16px}.lib-unified-actions a{font-size:10px}}@media(prefers-reduced-motion:reduce){.lib-unified-paper{transform:none}.lib-mobile-menu[open] .lib-mobile-menu-toggle>span{transition:none}}/* Footer refresh — existing brand colors; no sitewide CSS changes. */
.lib-site-footer{
  display:block;align-items:initial;text-align:left;width:100%;padding:0;
  margin-top:auto;background:var(--lib-paper);border-top:1px solid var(--lib-line);
  color:var(--lib-ink);
}
.lib-footer-inner{width:min(1240px,100%);margin:0 auto;padding:30px 28px 19px;min-width:0}
.lib-footer-inner::before{content:"";display:block;width:44px;height:3px;border-radius:3px;background:var(--lib-accent);margin:0 0 18px}
.lib-footer-main{display:flex;align-items:flex-start;justify-content:space-between;gap:22px 36px;padding-bottom:23px}
.lib-footer-identity{min-width:0;flex:1 1 390px}
.lib-footer-kicker{display:block;margin-bottom:6px;color:var(--lib-accent);font-size:10px;font-weight:800;letter-spacing:1.25px}
.lib-site-footer .lib-footer-identity strong{display:block;font-size:19px;line-height:1.4;font-weight:800;letter-spacing:-.25px;color:var(--lib-ink)}
.lib-site-footer .lib-footer-identity p{margin:7px 0 0;max-width:510px;font-size:12px;line-height:1.7;color:var(--lib-muted)}
.lib-site-footer .lib-footer-links{flex:0 1 auto;display:flex;align-items:center;justify-content:flex-end;gap:8px;flex-wrap:wrap;max-width:520px;min-width:0;margin:5px 0 0}
.lib-site-footer .lib-footer-links a{display:inline-flex;align-items:center;justify-content:center;min-height:39px;padding:8px 13px;border-radius:9px;border:1px solid var(--lib-line);background:var(--lib-bg);font-size:12px;font-weight:650;line-height:1.45;white-space:normal;text-align:center;text-decoration:none;color:var(--lib-ink);transition:border-color .15s,color .15s,background-color .15s}
.lib-site-footer .lib-footer-links a:hover{color:var(--lib-accent);border-color:var(--lib-accent);background:var(--lib-paper)}
.lib-site-footer .lib-footer-links a:focus-visible{outline:3px solid var(--lib-accent);outline-offset:2px}
.lib-footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px 20px;flex-wrap:wrap;border-top:1px solid var(--lib-line);padding-top:15px}
.lib-site-footer .lib-footer-bottom small,.lib-site-footer .lib-footer-bottom .lib-publisher{margin:0;font-size:11px;line-height:1.6;font-weight:450;color:var(--lib-muted)}
@media(max-width:800px){
  .lib-footer-inner{padding:26px 18px 19px}
  .lib-footer-main{flex-direction:column;gap:15px}
  .lib-footer-identity{flex:0 1 auto;width:100%}
  .lib-site-footer .lib-footer-links{justify-content:flex-start;width:100%;max-width:none;margin:0;gap:8px}
  .lib-footer-bottom{align-items:flex-start}
}
@media(max-width:480px){
  .lib-footer-inner{padding:23px 15px 18px}
  .lib-site-footer .lib-footer-identity strong{font-size:18px}
  .lib-site-footer .lib-footer-links a{min-height:42px;padding:10px 11px;font-size:12px}
  .lib-footer-bottom{flex-direction:column;gap:5px}
}
@media print{.lib-site-footer{display:none!important}}

/* BEP Detaylı module reference parity: layout and typography are from
   bep/landing.css .bep-intro, not guessed fixed card heights.
   Original H1, paragraph and links are kept verbatim. */
.lib-unified-hero,.lib-home-refresh .lib-home-hero.lib-unified-hero{
  width:min(1080px,calc(100vw - 40px));max-width:none;
  position:relative;left:50%;transform:translateX(-50%);
  box-sizing:border-box;height:auto;min-height:231px;
  margin:8px 0 28px;padding:26px 28px;
  border:1px solid var(--lib-line);border-left:4px solid #b91537;border-radius:12px;
  display:flex;flex-direction:row;align-items:center;justify-content:space-between;
  gap:23px;overflow:visible;
}
.lib-unified-hero-copy{flex:1 1 auto;min-width:0;max-width:none}
.lib-unified-hero .lib-eyebrow,.lib-home-refresh .lib-unified-hero .lib-eyebrow{
  display:block;margin:0 0 6px;font-size:10px;line-height:1.4;
  font-weight:700;letter-spacing:.08em;color:#b91537}
.lib-unified-hero h1,.lib-home-refresh .lib-home-hero.lib-unified-hero h1{
  margin:6px 0 9px;max-width:none;font-size:30px;line-height:1.3;
  font-weight:750;letter-spacing:-.02em;color:var(--lib-ink)}
.lib-unified-hero p,.lib-home-refresh .lib-home-hero.lib-unified-hero p{
  margin:0;max-width:650px;font-size:13px;line-height:1.65;color:var(--lib-muted);
  overflow-wrap:break-word}
.lib-unified-hero-aside{display:flex;flex:0 0 auto;max-width:none;width:auto;
  flex-direction:row;align-items:center;justify-content:flex-end;gap:23px}
.lib-unified-paper{width:176px;max-width:176px;flex:0 0 176px;padding:13px 15px;
  border-radius:10px}
.lib-unified-paper strong{font-size:8px;line-height:1.4}
.lib-unified-paper>span{font-size:10px;padding:5px 0}
.lib-unified-paper b{min-width:20px;height:20px;font-size:8px}
.lib-unified-paper small{font-size:7px}
.lib-unified-actions{width:172px;max-width:172px;flex:0 0 172px;gap:9px}
.lib-unified-actions a{font-size:12px;line-height:1.4;min-height:42px;padding:10px 9px;border-radius:8px}
@media(max-width:850px){
 .lib-unified-hero,.lib-home-refresh .lib-home-hero.lib-unified-hero{gap:15px}
 .lib-unified-hero h1,.lib-home-refresh .lib-home-hero.lib-unified-hero h1{font-size:27px}
 .lib-unified-hero-aside{gap:15px}
 .lib-unified-paper{width:145px;max-width:145px;flex-basis:145px;padding:11px}
 .lib-unified-paper>span{font-size:9px}
 .lib-unified-actions{width:138px;max-width:138px;flex-basis:138px}
 .lib-unified-actions a{font-size:11px}
}
@media(max-width:600px){
 .lib-unified-hero,.lib-home-refresh .lib-home-hero.lib-unified-hero{
  width:calc(100vw - 28px);height:auto;min-height:0;display:flex;flex-direction:column;
  align-items:stretch;gap:15px;padding:18px;margin:8px 0 22px}
 .lib-unified-hero-copy{width:100%;flex:0 0 auto;min-width:0}
 .lib-unified-hero h1,.lib-home-refresh .lib-home-hero.lib-unified-hero h1{font-size:25px}
 .lib-unified-hero p,.lib-home-refresh .lib-home-hero.lib-unified-hero p{font-size:12px;line-height:1.65}
 .lib-unified-hero-aside{display:grid;grid-template-columns:minmax(0,1fr) 118px;
  flex:0 0 auto;width:100%;max-width:none;gap:10px;align-items:center}
 .lib-unified-paper{grid-column:2;grid-row:1;max-width:118px;width:118px;flex:auto;padding:9px}
 .lib-unified-paper strong{font-size:7px}
 .lib-unified-paper>span{font-size:8px;gap:5px;padding:4px 0}
 .lib-unified-paper b{min-width:17px;height:17px;font-size:7px}
 .lib-unified-paper small{font-size:6px}
 .lib-unified-actions{grid-column:1;grid-row:1;width:100%;max-width:none;gap:9px}
 .lib-unified-actions a{font-size:11px;min-height:42px;padding:9px 7px;white-space:normal}
}