[hidden]{display:none!important}.chapter-top{padding:38px 0 25px}.back-link{font-size:12px;color:var(--muted);text-decoration:none;display:inline-block;margin-bottom:26px}.back-link:hover{text-decoration:underline}.chapter-top h1{font-size:clamp(32px,4vw,49px);line-height:1.14;max-width:790px;margin:16px 0}.chapter-sub{color:var(--muted);font-size:14px;max-width:650px}.chapter-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;padding:5px 0 65px}.panel{background:white;border:1px solid var(--line);border-radius:9px;padding:28px}.panel h2{font-family:Georgia,serif;color:var(--ink);font-size:27px;letter-spacing:-.5px;font-weight:400;margin:0 0 8px}.panel .sub{font-size:12px;color:var(--muted);margin:0 0 22px;line-height:1.7}.resource{padding:16px 0;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px}.resource strong{font-size:13px;font-weight:500}.resource .formats{display:flex;gap:7px}.format{font-size:10px;text-decoration:none;border:1px solid #d1dccc;border-radius:4px;padding:5px 8px}.format:hover{background:#e9eddf}.quiz-form label{display:block;color:var(--ink);font-size:12px;font-weight:700;margin:21px 0 9px}.quiz-form input[type=number],.quiz-form select{border:1px solid #bdcbb6;border-radius:5px;padding:11px;background:white;color:var(--ink);width:100%;font-size:14px}.mode-label{font-weight:400!important;border:1px solid var(--line);padding:12px;border-radius:5px;display:flex!important;align-items:start;gap:9px;margin:8px 0!important;cursor:pointer}.mode-label:has(input:checked){border-color:#71964a;background:#f2f6eb}.mode-label input{margin:3px 0 0;accent-color:var(--ink)}.mode-label span small{font-size:11px;color:var(--muted);font-weight:400;display:block;margin-top:3px}.quiz-form .primary{margin-top:22px;width:100%;justify-content:space-between;border:0;cursor:pointer}.shortcuts{display:flex;gap:7px;flex-wrap:wrap;margin-top:9px}.shortcut,.secondary{border:1px solid #cbd6c4;color:var(--ink);background:transparent;border-radius:5px;cursor:pointer;font-size:12px;padding:8px 12px}.shortcut:hover,.secondary:hover{background:#e9eddf}.notice{font-size:11px;color:var(--muted);line-height:1.7;margin:15px 0 0}.form-error{font-size:12px;color:#923826;margin-top:10px}.quiz-wrap{max-width:800px;margin:auto;padding:38px 0 65px}.quiz-heading{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:20px}.quiz-heading h1{font-size:30px;letter-spacing:-.8px;margin:7px 0}.quiz-heading .eyebrow{font-size:9px}.progress-info{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-bottom:9px}.progress{height:5px;background:#dde4d6;border-radius:5px;overflow:hidden;margin-bottom:25px}.progress div{height:100%;background:#718d57;transition:width .2s}.question{font-size:20px;line-height:1.5;font-weight:500;color:var(--ink);margin:0 0 23px}.answers{display:grid;gap:10px;border:0;padding:0;margin:0}.answer{display:flex;align-items:start;gap:12px;border:1px solid #d6ded0;background:white;padding:15px;border-radius:6px;cursor:pointer;font-size:14px;line-height:1.55}.answer input{margin-top:5px;accent-color:var(--ink)}.answer:has(input:checked){border-color:#71964a;background:#f0f5e8}.answer.correct{border-color:#70945a;background:#f0f5e8}.answer.wrong{border-color:#bf826d;background:#fcf1eb}.answer-letter{color:var(--muted);font-size:12px;font-weight:700;min-width:14px}.feedback{margin-top:22px;background:#edf3e3;border-left:3px solid #78945e;padding:17px;font-size:13px;line-height:1.7}.feedback.wrong{background:#fcf1eb;border-color:#bf826d}.feedback strong{display:block;margin-bottom:5px}.page-ref{font-size:11px;color:var(--muted);margin-top:9px}.quiz-actions{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:25px}.quiz-actions .primary{border:0;cursor:pointer}.quiz-actions button:disabled{opacity:.45;cursor:default}.review-title{font-family:Georgia,serif;font-size:33px;color:var(--ink);font-weight:400;margin:10px 0}.result-number{font-family:Georgia,serif;font-size:57px;line-height:1.1;color:var(--ink);margin:20px 0 10px}.review-item{border-top:1px solid var(--line);padding:24px 0}.review-item h3{font-size:15px;line-height:1.6;color:var(--ink);font-weight:500;margin:8px 0 13px}.review-item p{font-size:13px;line-height:1.7;margin:6px 0}.review-status{display:inline-block;font-size:10px;border-radius:20px;padding:3px 9px;background:#e9f0df;color:#456542}.review-status.missed{background:#f7e9e1;color:#854836}.quiz-warning{margin-top:15px;font-size:12px;color:#854836}.loading{padding:70px 0;font-size:15px;color:var(--muted)}.chapter-error{padding:60px 0 100px}.chapter-error h1{font-size:38px}.end-confirm{background:#faf6e8;border:1px solid #e4d9b1;padding:16px;margin-top:20px;border-radius:5px;font-size:13px}.end-confirm button{margin-top:12px}.resource-section{margin-bottom:24px}@media(max-width:700px){.chapter-layout{grid-template-columns:1fr;gap:16px;padding-bottom:40px}.panel{padding:21px}.chapter-top{padding-top:25px}.quiz-wrap{padding:25px 0 40px}.question{font-size:18px}.answer{padding:13px;font-size:13px}.quiz-heading h1{font-size:25px}.quiz-heading{align-items:start}.quiz-actions .primary{gap:12px;padding:12px 15px}.result-number{font-size:48px}.resource{align-items:start}.quiz-actions{flex-wrap:wrap}}
.panel .question{font-family:Arial,Helvetica,sans-serif;font-size:20px;line-height:1.5;font-weight:500;letter-spacing:0;margin:0 0 23px}@media(max-width:700px){.panel .question{font-size:18px}}

/* Chapter entry: put study actions before the downloads and keep mobile panels compact. */
.chapter-layout{align-items:start;gap:20px;padding-top:0}.chapter-top{padding-bottom:20px}.chapter-sub{margin:10px 0 16px}.back-link{margin-bottom:18px}.chapter-tools{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.chapter-tools a,.chapter-tools button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;text-decoration:none;padding:10px 16px;font-size:13px;line-height:1.35}.chapter-tools .primary{gap:12px}.resource-panel,.practice-panel{scroll-margin-top:16px}.resource-panel .sub,.practice-panel .sub{margin-bottom:12px;line-height:1.5}.resource-panel .resource{padding:11px 0;align-items:center;gap:10px}.resource-panel .format{display:inline-flex;align-items:center;justify-content:center;min-height:40px;min-width:44px;font-size:11px;padding:6px 10px}.resource-panel .notice{margin-top:11px;line-height:1.5}.practice-panel .quiz-form>label:first-child{margin-top:12px}.chapter-jump:focus-visible{outline:3px solid #71964a;outline-offset:4px}
@media(max-width:700px){.chapter-top{padding:20px 0 16px}.chapter-top h1{margin:10px 0}.chapter-tools{gap:8px}.chapter-tools a,.chapter-tools button{flex:1;padding:10px 12px;white-space:nowrap}.resource-panel,.practice-panel{padding:18px}.chapter-layout{gap:14px}.resource-panel h2,.practice-panel h2{font-size:25px}.resource-panel .resource{padding:9px 0}.resource-panel .resource strong{font-size:13px}.resource-panel .formats{gap:6px}}
.download-tests{margin-top:12px;border-top:1px solid var(--line)}.download-tests summary{cursor:pointer;min-height:44px;padding:12px 0;font-size:13px;font-weight:700}.chapter-status{font-size:12px;color:var(--muted)}.chapter-layout{grid-template-columns:1fr 1fr}.chapter-tools{margin:14px 0}.chapter-tools a,.chapter-tools button{font-size:14px}.navlinks{flex-wrap:wrap;gap:14px}#resume-home{padding:18px 0}#resume-home .panel{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.resume-link{display:inline-flex;padding:10px 14px;border:1px solid var(--line);border-radius:6px;min-height:44px;text-decoration:none}#study-search-link{display:inline-block}.chapter-tools .secondary{min-height:44px}@media(max-width:700px){.chapter-layout{grid-template-columns:1fr}.navlinks{gap:8px;font-size:12px}.navlinks a{min-height:36px;display:flex;align-items:center}nav.wrap{height:auto;min-height:92px;flex-wrap:wrap;padding-top:16px;padding-bottom:16px;gap:12px}.navlinks{width:100%;order:3;justify-content:space-between}.chapter-tools{position:sticky;top:0;background:var(--paper);z-index:2;padding:8px 0;margin:8px 0}.chapter-tools a,.chapter-tools button{font-size:13px}}


.chapter-tabs-layout{grid-template-columns:minmax(0,1fr);max-width:900px}.chapter-flashcards{width:100%;height:1000px;border:0;display:block}.chapter-tools [role=tab][aria-selected=true]{background:var(--ink);color:white;border:1px solid var(--ink)}