.reading-header{height:auto;min-height:92px;gap:22px;flex-wrap:wrap;padding-top:18px;padding-bottom:18px}.reading-header nav{display:flex;gap:25px;font-size:12px;align-items:center}.reading-language a{display:inline-flex;align-items:center;min-height:44px;padding:6px}.reading-language [aria-current=page]{font-weight:700;text-decoration:underline;text-underline-offset:5px}.reading-hero{background:var(--green);color:var(--cream);padding:60px 7% 62px}.reading-hero-inner{max-width:1180px;margin:auto}.reading-breadcrumb{font-size:11px;color:#bdccbe;display:inline-block;margin-bottom:32px}.reading-hero h1{font:400 clamp(37px,4.4vw,65px)/1.15 var(--serif);letter-spacing:-1.5px;max-width:940px;margin:18px 0 25px}.reading-deck{max-width:750px;font-size:18px;line-height:1.8;color:#c8d7c8}.reading-meta{display:flex;gap:24px;flex-wrap:wrap;color:#adbfaf;font-size:11px;margin-top:27px}.reading-layout{display:grid;grid-template-columns:215px minmax(0,720px);gap:75px;max-width:1180px;padding:64px 30px 80px;margin:auto}.reading-toc{align-self:start;position:sticky;top:35px;font-size:12px;padding-top:5px}.reading-toc ol{list-style:none;padding:0;margin:22px 0}.reading-toc a{display:block;padding:11px 0;border-bottom:1px solid var(--line);line-height:1.7}.reading-toc a:hover{text-decoration:underline}.reading-toc .eyebrow{font-size:9px}.reading-article{min-width:0}.reading-article section{margin-bottom:52px;scroll-margin-top:28px}.reading-article h2{font-size:32px;letter-spacing:-.6px;line-height:1.25;margin:0 0 23px}.reading-article h2 .part-number{font-family:var(--sans);font-size:11px;display:block;color:var(--muted);letter-spacing:1.6px;margin-bottom:12px}.reading-article p{font-size:16px;line-height:1.95;color:#344b40}.reading-article p+p{margin-top:18px}.reading-article strong{font-weight:600;color:var(--ink)}.reading-article .source-note{font-size:11px;line-height:1.8;color:var(--muted);border-left:2px solid #bcc8ac;padding-left:13px;margin-top:23px}.source-note a,.reading-reference a{text-decoration:underline;text-underline-offset:3px}.reading-definition{margin:25px 0;padding:24px 28px;background:var(--cream);border-left:3px solid #97ad8c}.reading-definition p{font-family:var(--serif);font-size:23px;line-height:1.55}.reading-example{padding:28px;background:#ecefe2;margin:26px 0;border:1px solid #d2dac6}.reading-example .eyebrow{font-size:9px;letter-spacing:1.4px;margin-bottom:13px}.reading-example p{font-size:15px}.reading-table-wrap{max-width:100%;overflow-x:auto;margin:24px 0}.reading-table{width:100%;border-collapse:collapse;font-size:14px;text-align:left;line-height:1.8}.reading-table th{font-weight:600;background:var(--cream);padding:13px 16px;border-bottom:1px solid var(--line)}.reading-table td{padding:16px;border-bottom:1px solid var(--line);vertical-align:top}.reading-table td:first-child{width:30%;font-weight:600}.reading-routes{padding:0;list-style:none;margin:25px 0}.reading-routes li{border-top:1px solid var(--line);padding:20px 0}.reading-routes li:last-child{border-bottom:1px solid var(--line)}.reading-routes a{font:400 24px/1.4 var(--serif);display:block;margin-bottom:8px}.reading-routes a:hover{text-decoration:underline}.reading-routes p{font-size:14px}.reading-reference{font-size:12px;line-height:1.9;color:var(--muted);padding-top:25px;border-top:1px solid var(--line);overflow-wrap:anywhere}.reading-next{margin-top:40px}.reading-footer{max-width:none}.reading-footer .footer-top{max-width:1180px;margin:auto}.reading-footer .footer-bottom{max-width:1180px;margin:auto}
@media(max-width:900px){.reading-layout{gap:35px;grid-template-columns:180px minmax(0,1fr)}.reading-header nav{gap:16px}}
@media(max-width:700px){.reading-header{min-height:78px;gap:12px}.reading-header nav{display:none}.reading-hero{padding:36px 6% 42px}.reading-hero h1{font-size:38px;letter-spacing:-1px}.reading-deck{font-size:16px}.reading-layout{display:block;padding:35px 6% 55px}.reading-toc{position:static;border-bottom:1px solid var(--line);margin-bottom:38px;padding-bottom:20px}.reading-toc ol{display:grid;grid-template-columns:1fr 1fr;gap:0 18px;margin-bottom:0}.reading-toc a{font-size:11px}.reading-article h2{font-size:29px}.reading-article p{font-size:15px}.reading-definition{padding:20px}.reading-definition p{font-size:21px}.reading-example{padding:21px}.reading-example p{font-size:14px}.reading-table{font-size:12px}.reading-table th,.reading-table td{padding:11px}.reading-meta{gap:8px 18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.reading-header,.reading-toc,.reading-next{display:none}.reading-hero{background:white;color:black;padding:20px}.reading-hero p,.reading-hero .eyebrow,.reading-meta{color:black}.reading-layout{display:block;padding:20px;max-width:none}.reading-article section{margin-bottom:25px}.reading-article h2{break-after:avoid}.reading-example,.reading-table tr{break-inside:avoid}.reading-footer{display:none}}

/* Close reading and chapter-to-chapter navigation. */
.reading-article .reading-table th[scope=row]{background:transparent;border-bottom:1px solid var(--line);vertical-align:top;font-size:13px;font-weight:600}
.trace-figure{margin:28px 0;background:var(--cream);border:1px solid var(--line);padding:20px}.trace-figure img{display:block;width:100%;height:auto;max-width:560px;margin:auto}.trace-figure figcaption{font-size:12px;line-height:1.8;color:var(--muted);padding:16px 8px 0}
.reading-math{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:26px 0}.reading-math summary{cursor:pointer;padding:19px 4px;font-size:14px;font-weight:600;line-height:1.6}.reading-math summary:focus-visible{outline:3px solid #a68b47;outline-offset:4px}.reading-math>div{padding:4px 4px 24px}.reading-math>div>p{font-size:14px}.trace-equations{padding:20px;background:var(--cream);margin:20px 0;overflow-wrap:anywhere}.trace-equations p{font-family:var(--serif);font-size:20px!important;line-height:1.8}.trace-equations p+p{margin-top:6px}.reading-questions{padding-left:22px;margin:24px 0;line-height:1.9;color:#344b40}.reading-questions li{margin-bottom:14px;padding-left:5px}.reading-claim{margin:25px 0;padding:24px 28px;border-left:3px solid #97ad8c;background:var(--cream)}.reading-claim p{font-family:var(--serif);font-size:22px;line-height:1.65}.reading-source-links{font-size:14px;line-height:2;padding-left:20px}.reading-source-links a{text-decoration:underline;text-underline-offset:3px}.reading-reference+p{margin-top:24px}.chapter-navigation{display:flex;gap:24px;flex-wrap:wrap;align-items:flex-start;padding-top:24px;border-top:1px solid var(--line);margin-top:35px}.chapter-navigation .button{max-width:100%;text-wrap:pretty}.chapter-navigation .text-link{font-size:12px}
@media(max-width:700px){.trace-figure{padding:8px}.trace-figure figcaption{font-size:11px;padding:12px 7px 6px}.reading-article .reading-table th[scope=row]{font-size:12px;padding:11px}.reading-questions{font-size:15px}.reading-claim{padding:20px}.reading-claim p{font-size:20px}.trace-equations{padding:15px}.trace-equations p{font-size:18px!important}.chapter-navigation{gap:17px}.reading-math summary{font-size:13px}}
@media print{.trace-figure,.reading-claim{break-inside:avoid}.chapter-navigation{display:none}}

.reading-article .inline-source{text-decoration:underline;text-underline-offset:3px}.chapter-navigation .chapter-next{flex-basis:100%}

/* Extended study chapters: compact contents and intermediate headings. */
.reading-toc--deep{max-height:calc(100vh - 70px);overflow-y:auto;padding-right:8px}.reading-toc--deep a{padding:7px 0;font-size:11px}.reading-article h3{font:400 24px/1.4 var(--serif);margin:28px 0 15px;color:var(--ink)}.reading-paths{margin-top:0}.reading-reference p{font-size:12px;line-height:1.8}.reading-reference+.reading-reference{margin-top:25px}
@media(max-width:700px){.reading-toc--deep{max-height:none;overflow:visible;padding-right:0}.reading-article h3{font-size:22px}}

/* Long source comparisons keep each column inside narrow study layouts. */
.reading-article #crosswalk .reading-table{overflow-wrap:anywhere}