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@media(max-width:700px){html{scroll-padding-top:125px}body{padding-top:113px}.header-shell .site-header{height:108px;display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-rows:62px 40px;gap:0 12px;align-items:center}.site-header .brand{grid-column:1;grid-row:1}.site-header .nav-cta{grid-column:2;grid-row:1;margin:0;padding:9px 12px}.site-header nav{display:flex;position:static;grid-column:1/-1;grid-row:2;flex-direction:row;align-items:center;gap:19px;margin:0;padding:0;overflow-x:auto;white-space:nowrap;background:transparent;box-shadow:none;border-top:1px solid var(--line);scrollbar-width:none}.site-header nav::-webkit-scrollbar{display:none}.site-header nav a{border:0;padding:9px 0;font-size:12px}.hero-photo{height:280px;margin:40px 10px 0 0}.hero-photo figcaption{font-size:11px;padding:11px 13px}.hero-footnote{margin-top:28px}.team-story-photo img{height:190px}.assistant-photo img{height:180px}.chapter-banner{grid-template-columns:1fr}.chapter-banner img{height:190px}.chapter-banner>div{padding:22px}.chapter-banner h3{font-size:22px}.concept-images{grid-template-columns:1fr}.concept-images img{height:210px}.study-photo img{height:165px}.topic-card{min-height:235px}}
@media(max-width:400px){.site-header nav{gap:14px}.site-header nav a{font-size:11px}.brand{font-size:18px}.hero-photo{height:230px}.team-crew p{gap:10px 16px}}

/* Keep the complete supplied quiz image visible on every screen. */
.study-photo{max-width:850px;margin:0 auto 24px}
.study-photo img{display:block;width:100%;height:auto;object-fit:contain}

/* Chapter 4 records and the group's work stay readable without hiding the source. */
.knowledge-section{padding-top:76px;margin-top:68px;border-top:1px solid var(--line)}.knowledge-heading{max-width:690px;margin-bottom:28px}.knowledge-heading h2,.progress-intro h2,.sources-block h2{font-size:clamp(30px,3vw,42px);line-height:1.2;letter-spacing:-1.3px;margin:16px 0 13px}.knowledge-heading p,.progress-intro p,.sources-block p{font-size:14px;line-height:1.7;color:#5f7180;margin:0 0 11px}.knowledge-entry{background:#fff;border:1px solid #dce1df;margin-bottom:9px}.knowledge-entry summary{display:flex;align-items:center;gap:17px;list-style:none;padding:21px 23px;cursor:pointer}.knowledge-entry summary::-webkit-details-marker{display:none}.knowledge-entry summary:hover,.knowledge-entry summary:focus-visible{background:#f6f8f7}.knowledge-entry summary:focus-visible{outline:2px solid var(--amber);outline-offset:2px}.knowledge-number{font:600 11px var(--mono);color:#ad7d35}.knowledge-title{font-size:17px;font-weight:700}.knowledge-more{font:600 10px var(--mono);letter-spacing:.8px;color:#8e9da4;margin-left:auto}.knowledge-entry[open] .knowledge-more{color:#ad7d35}.knowledge-body{border-top:1px solid #e6ebe9;padding:23px}.knowledge-meaning{font-size:15px;line-height:1.6;color:var(--navy);font-weight:600;margin:0 0 24px;max-width:780px}.knowledge-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 35px}.knowledge-grid h3{font-size:13px;color:var(--navy);margin:0 0 6px}.knowledge-grid p,.knowledge-questions p,.knowledge-answer p{font-size:12px;line-height:1.65;color:#536b79;margin:0}.knowledge-questions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:25px 0 13px}.knowledge-questions>div{border-left:2px solid var(--amber);background:#faf9f5;padding:13px 15px}.knowledge-questions strong,.knowledge-answer strong{font:600 10px var(--mono);letter-spacing:.5px;color:#9b6e2d;display:block;margin-bottom:8px}.knowledge-answer{padding:16px;background:#e9f0f2}.knowledge-citation{font-size:10px;color:#7b8a90;margin:17px 0 0}.knowledge-download{margin-top:20px;text-align:right;font-size:12px;font-weight:700}.knowledge-download a{border-bottom:1px solid currentColor;padding-bottom:3px}.knowledge-download a:hover{color:#a7772f}.sources-block{background:#fff;border:1px solid var(--line);padding:35px;margin-top:70px}.sources-block p{max-width:830px}.prompt-groups{margin-top:22px}.prompt-group{margin-bottom:22px}.prompt-group h3{font:600 10px var(--mono);letter-spacing:1px;color:#9b6e2d;margin:0 0 10px}.prompt-group .prompt-stack{grid-template-columns:1fr}.source-line a{font-weight:700;text-decoration:underline;text-underline-offset:3px;color:var(--navy)}.progress-section{padding-top:45px;padding-bottom:100px;border-top:1px solid var(--line)}.progress-intro{max-width:680px;margin-bottom:30px}.progress-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.progress-grid article{background:#fff;border:1px solid var(--line);padding:25px}.progress-grid article span{font:600 11px var(--mono);color:#ad7d35}.progress-grid h3{font-size:19px;line-height:1.3;margin:22px 0 9px}.progress-grid p,.progress-next p{font-size:13px;line-height:1.7;color:#617581;margin:0}.progress-next{margin-top:15px;border-left:2px solid var(--amber);padding:10px 0 10px 20px;max-width:760px}.progress-next strong{font:600 10px var(--mono);letter-spacing:1px;color:#a0712d;display:block;margin-bottom:8px}
@media(max-width:700px){.knowledge-section{padding-top:57px;margin-top:50px}.knowledge-entry summary{padding:18px 15px;gap:12px}.knowledge-title{font-size:14px}.knowledge-more{font-size:9px}.knowledge-body{padding:18px}.knowledge-meaning{font-size:14px}.knowledge-grid,.knowledge-questions,.progress-grid{grid-template-columns:1fr}.knowledge-grid{gap:17px}.knowledge-questions{gap:9px}.sources-block{padding:23px;margin-top:54px}.progress-section{padding-top:35px;padding-bottom:65px}.progress-grid article{padding:22px}.prompt-group .prompt-stack{grid-template-columns:1fr}}