:root{font-family:Arial,Helvetica,sans-serif;color:#252d33;background:#fff;font-size:14px;font-synthesis:none;--muted:#626b73;--border:#dce0e3;--surface:#f5f6f7;--accent:#233e55}*{box-sizing:border-box}body{margin:0}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:3px}button,input{font:inherit;color:inherit;border-radius:0}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}main:focus{outline:none}::selection{background:#dce6ed;color:#172c3e}h1,h2,h3,p,dl,dd{margin:0}h1,h2,h3{font-weight:600;line-height:1.4}h1{font-size:26px;color:var(--accent)}h2{font-size:21px;color:var(--accent)}h3{font-size:15px}p,li{line-height:1.7}header,main,footer{width:min(1120px,calc(100% - 80px));margin-inline:auto}header{border-bottom:1px solid var(--border)}nav.primary{display:flex;align-items:stretch;gap:32px;min-height:76px}nav.primary a{display:flex;align-items:center;color:var(--muted);border-bottom:2px solid transparent;font-size:14px}nav.primary a[aria-current=page]{color:var(--accent);border-bottom-color:var(--accent)}main{min-height:70vh;padding-bottom:44px}.intro{padding:38px 0 28px}.intro h1{margin-bottom:12px}.intro>p{max-width:760px;color:var(--muted)}.eyebrow{font-size:12px;color:var(--muted);margin-bottom:12px}.home-intro{padding:40px 0 32px;border-bottom:1px solid var(--border)}.home-intro h1{font-size:26px;margin-bottom:14px}.home-intro .lead{font-size:19px;line-height:1.5;max-width:760px}.home-intro .description{max-width:720px;margin-top:16px;color:var(--muted)}.inline-links{display:flex;flex-wrap:wrap;gap:12px 28px;margin-top:20px;font-size:13px}.inline-links a{text-decoration:underline;text-underline-offset:4px}.review-note{font-size:12px;color:var(--muted);padding:13px 0;border-bottom:1px solid var(--border);line-height:1.65}.section-heading{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:18px}.section-heading>a{font-size:13px}.home-grid{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:36px;padding-top:30px}.home-aside{padding-left:26px;border-left:1px solid var(--border)}.home-aside h2{font-size:14px;margin-bottom:18px}.facts{font-size:13px}.facts div+div{margin-top:20px}.facts dt{font-size:12px;color:var(--muted);margin-bottom:6px}.facts dd{line-height:1.7}.note{font-size:12px;color:var(--muted);line-height:1.65}.home-aside .note{margin-top:24px}.module-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--border)}.module-list li{border-bottom:1px solid var(--border)}.module-link{display:grid;grid-template-columns:32px minmax(0,1fr) 92px;gap:14px;align-items:baseline;padding:18px 12px}.module-link:hover{background:#fafbfc;text-decoration:none}.module-link:hover strong{text-decoration:underline;text-underline-offset:3px}.module-link strong{font-size:14px;font-weight:500;display:block}.module-link .summary{display:block;font-size:13px;color:var(--muted);margin-top:4px;line-height:1.6}.module-number{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.module-meta{font-size:11px;text-align:right;color:var(--muted)}.section-block{margin-top:36px}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:13px}thead{border-top:1px solid var(--border)}th,td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--border);vertical-align:top;line-height:1.65}thead th{font-weight:500;background:var(--surface);color:var(--muted);font-size:12px}tbody th{font-weight:400}.date{font-variant-numeric:tabular-nums;white-space:nowrap;color:var(--muted)}.text-column{max-width:780px}.text-column p+p{margin-top:16px}.text-section{border-top:1px solid var(--border);padding:26px 0}.text-section h2{font-size:20px;margin-bottom:16px}.text-section h3{margin:24px 0 10px}.text-section p{font-size:15px;line-height:1.85}.text-section ul{padding-left:20px}.lesson{max-width:780px;margin:30px auto 0}.back-link{font-size:12px}.lesson .intro h1{font-size:28px}.lesson .intro{padding:24px 0}.lesson-facts{display:flex;flex-wrap:wrap;gap:16px 36px;margin-top:22px;font-size:12px}.lesson-facts dt{color:var(--muted);margin-bottom:6px}.lesson-facts dd{max-width:440px;line-height:1.65}.contents{border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:8px 24px;padding:16px 0;font-size:12px}.text-section{scroll-margin-top:24px}.concepts{display:grid;grid-template-columns:1fr 1fr;gap:8px 24px;list-style:none;padding:0!important}.concepts li{font-size:13px;border-bottom:1px solid var(--border);padding:8px 0}.activity{padding:24px 0;border-top:1px solid var(--border)}.activity h2{font-size:19px;margin:8px 0 12px}.activity h3{margin-bottom:10px}.activity p{max-width:760px}.activity .note{margin-top:12px}.meeting{display:grid;grid-template-columns:160px minmax(0,1fr);gap:28px;padding:26px 0;border-top:1px solid var(--border)}.meeting h2{font-size:20px;margin-bottom:12px}.meeting p+p{margin-top:10px}.meeting .topics{color:var(--muted);font-size:13px}.meeting .inline-links{margin-top:14px}.undated{padding-top:28px;border-top:1px solid var(--border);margin-top:20px}.undated h2{margin-bottom:12px}.next-lesson{border-top:1px solid var(--border);display:flex;justify-content:space-between;gap:24px;padding-top:22px;font-size:13px}.quiz{border-top:1px solid var(--border);padding:24px 0}.quiz summary{color:var(--accent);font-size:18px;cursor:pointer}.quiz .note{margin:12px 0 20px}.quiz fieldset{border:0;padding:0;margin:24px 0}.quiz legend{font-weight:600;line-height:1.7;margin-bottom:10px}.quiz label{display:flex;align-items:baseline;gap:10px;border-bottom:1px solid var(--border);padding:12px 8px;cursor:pointer;line-height:1.6}.quiz label:hover{background:var(--surface)}.quiz input{accent-color:var(--accent)}.quiz .feedback{margin-top:14px;font-size:13px}.quiz button{border:1px solid var(--border);background:#fff;padding:10px 14px}.quiz button:hover{background:var(--surface)}footer{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--border);padding:20px 0 28px;font-size:12px;color:var(--muted)}.skip-link{position:fixed;top:-80px;left:16px;z-index:10;background:var(--accent);color:#fff;padding:12px}.skip-link:focus{top:12px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:1000px){.home-grid{grid-template-columns:minmax(0,1fr) 205px;gap:24px}.home-aside{padding-left:18px}nav.primary{gap:24px}}
@media(max-width:760px){header,main,footer{width:calc(100% - 40px)}nav.primary{min-height:64px;gap:0;flex-wrap:wrap}nav.primary a{min-height:48px;font-size:13px;margin-right:24px}.home-intro{padding:30px 0}.home-intro .lead{font-size:18px}.home-grid{grid-template-columns:minmax(0,1fr);gap:28px}.home-aside{border-left:0;border-top:1px solid var(--border);padding:20px 0 0}.facts{display:flex;flex-wrap:wrap;gap:20px 36px}.facts div+div{margin-top:0}.meeting{grid-template-columns:1fr;gap:12px}.lesson .intro h1{font-size:25px}.lesson{margin-top:24px}.table-wrap table{min-width:500px}.intro{padding-top:30px}}
@media(max-width:480px){header,main,footer{width:calc(100% - 32px)}nav.primary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 14px}nav.primary a{font-size:12px;margin:0;justify-content:center}.home-intro h1,h1{font-size:24px}h2{font-size:20px}.module-link{grid-template-columns:24px minmax(0,1fr);gap:6px 12px;padding:16px 0}.module-meta{grid-column:2;text-align:left}.concepts{grid-template-columns:1fr}.text-section p{font-size:14px}.next-lesson{flex-direction:column;gap:16px}footer{font-size:11px;align-items:baseline}footer a{flex-shrink:0}}
@media print{header,footer,.skip-link,.back-link,.contents,.next-lesson,.quiz{display:none}main,.lesson{width:100%;max-width:none;margin:0}.text-section{padding-block:16px}h2,h3{break-after:avoid}}
.text-section .source-note{font-size:12px;line-height:1.65;color:var(--muted);margin-top:8px}.text-section p.note{font-size:12px;line-height:1.65;margin-top:12px}.table-wrap:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
/* Presentation source pages retain the portfolio's typography and ruled sections. */
.presentation-page{margin:30px auto 0;max-width:1000px}.presentation-page .intro{padding:20px 0}.source-filename{overflow-wrap:anywhere;font-size:12px}.pdf-section{margin:0 0 24px}.pdf-viewer{display:block;width:100%;height:660px;border:1px solid var(--border);background:var(--surface)}.pdf-section .inline-links{margin-top:14px}.pdf-section>.note{margin-top:12px}.presentation-copy{max-width:780px}.source-summary+.source-summary{margin-top:22px}.presentation-link{display:grid;grid-template-columns:minmax(0,1fr) 180px;gap:20px;padding:18px 12px;align-items:baseline}.presentation-link strong{font-size:14px;font-weight:500}.presentation-link .summary{display:block;font-size:12px;color:var(--muted);margin-top:5px;overflow-wrap:anywhere}.presentation-link:hover{background:#fafbfc}.catalog-count{margin-bottom:18px}.catalog-links{margin:0 0 24px}nav.primary{gap:26px}
@media(max-width:760px){.pdf-viewer{height:520px}.presentation-link{grid-template-columns:1fr;gap:8px}.presentation-link .module-meta{text-align:left}nav.primary{gap:0}.presentation-page{margin-top:24px}}
@media(max-width:480px){.pdf-viewer{height:420px}.presentation-link{padding:16px 0}nav.primary{gap:0 14px}}
@media print{.pdf-section{display:none}.presentation-page{max-width:none;margin:0}}
.meeting{grid-template-columns:minmax(0,1fr)}

/* A single reading column keeps the topic index easy to scan. */
.topics-index{max-width:900px;margin-inline:auto}
.topics-index .presentation-link{padding:24px 8px;grid-template-columns:minmax(0,1fr) 120px;align-items:center;gap:32px}
.topics-index .presentation-link strong{display:block;font-size:16px;font-weight:600;line-height:1.5}
.topics-index .presentation-link .summary{font-size:13px;line-height:1.65;max-width:610px;margin-top:6px}
.topics-index .presentation-link:hover{text-decoration:none}
.topics-index .presentation-link:hover strong{text-decoration:underline;text-underline-offset:4px}
.meeting-summary{margin:0;padding-left:20px}
.meeting-summary li{font-size:15px;line-height:1.8;padding-left:4px}
.meeting-summary li+li{margin-top:12px}
@media(max-width:760px){.topics-index .presentation-link{grid-template-columns:minmax(0,1fr);gap:10px;padding:20px 0}.topics-index .module-meta{grid-column:1;text-align:left}.meeting-summary li{font-size:14px}}