@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Manrope:wght@400;500;600;650;700;750;800&display=swap');
:root{--ink:#182823;--muted:#65736e;--green:#078459;--bright:#119666;--paper:#fff;--line:#dfe7e2;--soft:#f1f6f3;--dark:#143d30;--radius:22px;font-size:16px;color-scheme:light}
*{box-sizing:border-box}body{margin:0;background:#f0f4f2;color:var(--ink);font-family:'DM Sans',Arial,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}button,select,input{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{cursor:default;opacity:.4}button,a,summary{touch-action:manipulation}a{color:var(--green);text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #1ca773;outline-offset:5px}button{transition:background .18s,color .18s,border-color .18s,transform .18s}h1,h2,h3,p,figure{margin:0}h1,h2,h3{font-family:Manrope,Arial,sans-serif}h1,h2{font-weight:750;letter-spacing:-.055em;line-height:1.12}h1{font-size:clamp(54px,6.2vw,86px)}h2{font-size:clamp(36px,3.6vw,52px);margin:13px 0 24px;max-width:900px}h3{font-size:20px;line-height:1.3;font-weight:750;letter-spacing:-.025em;margin-bottom:8px}p{font-size:17px;line-height:1.65;margin:16px 0;color:#52635b}p b{color:var(--ink)}button{border:0}button svg{width:20px}small{font-size:13px}
header{height:94px;max-width:1536px;margin:auto;display:flex;align-items:center;gap:30px;padding:0 48px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-family:Manrope,sans-serif;font-size:14px;font-weight:800;line-height:1.3;letter-spacing:.04em}.brand img{width:47px;height:47px;object-fit:contain}.brand small{display:block;font:600 9px/1.8 'DM Sans',sans-serif;letter-spacing:.17em}.course-label{padding-left:29px;border-left:1px solid #d3ddd7;display:flex;flex-direction:column;line-height:1.6;font-size:12px;color:var(--muted)}.course-label b{font-size:14px;font-weight:600;color:var(--ink)}.header-actions{display:flex;align-items:center;gap:7px;margin-left:auto}.quiet{background:transparent;padding:11px 16px;border-radius:10px;font-size:14px;font-weight:550;color:var(--muted)}.quiet:hover:not(:disabled){background:#e5ede8;color:var(--ink)}#fullBtn{background:white;color:var(--ink);border:1px solid var(--line);margin-left:10px}#fullBtn:hover{border-color:#8fa79a}
main{background:var(--paper);border:1px solid #e0e8e2;border-radius:26px;box-shadow:0 4px 22px #1c3d2904;max-width:1440px;width:calc(100% - 80px);min-height:calc(100dvh - 190px);margin:0 auto;padding:clamp(32px,3.2vw,52px);outline:none;overflow:clip}.eyebrow{display:block;color:var(--green);font-size:12px;line-height:1.5;font-weight:700;letter-spacing:.13em;text-transform:uppercase}.lead{font-size:19px;line-height:1.65;color:#52645b;margin:18px 0 24px;max-width:56ch}.primary,.next{display:inline-flex;align-items:center;justify-content:center;gap:35px;min-height:50px;padding:13px 23px;background:var(--green);color:white;border-radius:12px;font-size:14px;font-weight:650;text-decoration:none}.primary:hover,.next:hover:not(:disabled){background:#096544;transform:translateY(-1px)}.primary span,.next span{font-size:21px;line-height:1}.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,84px);align-items:center;min-height:480px}.visual-lesson{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(32px,4vw,60px);align-items:center}.visual-lesson>.lesson-copy{max-width:540px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:20px}.section-heading h2{margin-bottom:10px}.section-heading>p{font-size:15px;max-width:335px;margin:0 0 14px}.wide-heading{display:flex;gap:45px;align-items:end;justify-content:space-between;margin-bottom:24px}.wide-heading p{max-width:390px;font-size:16px}.evidence-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:17px;margin-top:32px;color:#7b8b82;font-size:12px}.evidence-bar span{white-space:nowrap;max-width:65%;overflow:hidden;text-overflow:ellipsis}.evidence-bar button,.text-button{padding:0;background:none;font-size:12px;color:var(--green)}.evidence-bar button:hover,.text-button:hover{text-decoration:underline}.note{border-left:2px solid #a2ccb7;padding:0 0 0 17px;font-size:14px;line-height:1.7;margin-top:26px;color:#64776b}.source-note{font-size:13px;line-height:1.7;color:#7a8980}.technical-note{border-radius:14px;background:var(--soft);padding:19px 23px;margin-top:24px}.technical-note>b{font-size:14px;color:var(--green)}.technical-note p{font-size:15px;margin:7px 0 0}.class-details{margin-top:24px;padding:18px 0 4px;border-top:1px solid var(--line);font-size:14px;color:#5a6d60}.class-details summary,details summary{cursor:pointer;font-weight:600;color:var(--ink)}.class-details p,details p{font-size:14px;line-height:1.8}.class-details li{margin:9px 0}
/* Opening spread */
.cover-editorial{display:grid;grid-template-columns:.9fr 1.1fr;column-gap:25px;align-items:center}.cover-intro{padding:12px 0 22px 8px}.cover-intro .eyebrow{margin-bottom:24px}.cover-intro h1{margin:0 0 16px}.cover-intro h1>span{color:var(--green)}.cover-process{font-family:Manrope,sans-serif;font-size:27px;letter-spacing:-.035em;font-weight:700}.cover-process>span{color:#8a9991;font-size:20px;font-weight:500;margin-left:6px}.cover-intro .lead{font-size:20px;margin:23px 0 29px}.cover-position-list{display:flex;align-items:center;gap:9px;margin-top:37px}.cover-position-list>span{background:var(--soft);color:var(--green);border-radius:7px;padding:5px 9px;font-size:13px;font-weight:700}.cover-position-list>small{font-size:12px;color:var(--muted);margin-left:5px}.cover-object{align-self:center;min-width:0;padding-top:15px}.cover-object img{width:100%;display:block;aspect-ratio:16/11;object-fit:contain}.object-caption{margin:15px 6px 0;display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:17px;font-size:13px;color:var(--muted);gap:20px}.object-caption button{font-size:13px;color:var(--green);background:none;white-space:nowrap}.cover-colophon{grid-column:1/-1;display:flex;justify-content:space-between;gap:25px;margin-top:26px;padding:23px 8px 0;border-top:1px solid var(--line)}.cover-colophon>div{display:flex;flex-direction:column;gap:3px;font-size:12px;color:var(--muted)}.cover-colophon b{font-weight:550;color:var(--ink)}.cover-editorial+.evidence-bar{display:none}
/* Text-led lessons */
.agenda-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 50px;margin-top:15px}.agenda-grid button{display:flex;text-align:left;background:none;padding:24px 0;gap:22px;border-top:1px solid var(--line)}.agenda-grid button>span{font:500 24px/1.3 Manrope,sans-serif;color:#82a391}.agenda-grid button>div{flex:1}.agenda-grid h3{font-size:22px}.agenda-grid p{font-size:15px;line-height:1.6;margin:0}.agenda-grid button>b{font-size:23px;color:#9aad9f;font-weight:400}.agenda-grid button:hover h3{color:var(--green)}.class-quote{font-size:14px;color:var(--green);font-style:italic;margin:30px 0 0}.dark-block{background:var(--dark);padding:40px;border-radius:22px;color:white}.dark-block h3,.dark-block .row h3,.dark-block summary{color:white}.dark-block p{color:#c2d3c8}.dark-block .eyebrow{color:#8ee6b9}.dark-block .num{color:#91c5a8}.dark-block .row{border-color:#426552}.big-word{font:600 90px/1.2 Manrope,sans-serif;letter-spacing:-.06em;margin:10px 0}.rule{border:0;border-top:1px solid #567561;margin:26px 0}.dark-block details{margin-top:22px;font-size:14px}.credential-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin:30px 0}.credential-grid>div{background:var(--soft);padding:28px;border-radius:17px}.credential-code{font:600 40px/1 Manrope,sans-serif;letter-spacing:-.05em;color:var(--green);margin-bottom:25px}.credential-grid h3{font-size:20px}.credential-grid small{display:block;font-size:12px;line-height:1.6;color:var(--muted)}.credential-grid p{font-size:16px;margin:18px 0 0}.credential-grid .eyebrow{margin-bottom:18px}.two-cols{display:grid;grid-template-columns:1fr 1fr;gap:60px}.two-cols>div{border-top:1px solid var(--line);padding-top:26px}.qualification-line{display:flex;flex-wrap:wrap;gap:23px;margin:27px 0;font:600 28px/1.5 Manrope,sans-serif;color:var(--green)}.ppe-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:28px}.ppe-grid>div{border-top:1px solid var(--line);padding-top:20px}.ppe-grid>div>span{display:inline-flex;align-items:center;justify-content:center;border-radius:8px;background:var(--soft);width:34px;height:34px;color:var(--green);font-size:13px;font-weight:600;margin-bottom:16px}.ppe-grid h3{font-size:18px}.ppe-grid p{font-size:15px;line-height:1.65;margin:9px 0}.checklist{display:flex;flex-direction:column;gap:12px}.checklist>label{display:flex;align-items:start;gap:16px;border:1px solid var(--line);padding:19px;border-radius:13px;cursor:pointer}.checklist>label:has(input:checked){background:#eff8f2;border-color:#a6cfb6}.checklist input{accent-color:var(--green);width:18px;height:18px;flex-shrink:0;margin-top:4px}.checklist b{display:block;font-size:16px}.checklist small{display:block;font-size:14px;line-height:1.6;color:var(--muted);margin-top:5px}.check-status{color:var(--green);font-size:14px;font-weight:600}.rows{margin-top:22px}.row{display:grid;grid-template-columns:28px 1fr;gap:16px;border-top:1px solid var(--line);padding:19px 0}.row h3{font-size:18px}.row p{font-size:15px;margin:7px 0 0}.num{font:500 15px/1.5 Manrope,sans-serif;color:#88a393}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;counter-reset:steps;margin-top:36px}.step{border-top:1px solid var(--line);padding-top:22px}.step:before{counter-increment:steps;content:'0' counter(steps);display:block;color:var(--green);font:600 28px/1 Manrope;margin-bottom:26px}.step h3{font-size:20px}.step p{font-size:16px}.tag{font-size:12px;letter-spacing:.1em;color:var(--green);font-weight:700}.career-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:23px;margin:28px 0}.career-grid>div{padding:23px;background:var(--soft);border-radius:15px}.career-grid span{font-size:12px;color:#88a291}.career-grid h3{margin-top:13px;font-size:19px}.career-grid p{font-size:15px;margin:10px 0 0}
/* Exact technical illustrations */
.cad-lesson{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.85fr);gap:40px;align-items:center;min-height:495px}.cad-visual{min-width:0}.cad-copy{padding:15px 0 15px 18px}.cad-copy h2{font-size:clamp(34px,3.1vw,45px);margin:12px 0 21px}.cad-copy .lead{font-size:18px;margin:20px 0}.cad-copy>p:not(.lead){font-size:16px}.cad-copy .rows{margin-top:26px}.cad-copy .row{padding:17px 0}.cad-copy .row .num{font-size:12px}.cad-copy .row h3{font-size:16px}.cad-copy .row p{font-size:15px}.cad-copy>.source-note{font-size:12px!important;margin-top:21px}.position-title-block{margin-top:20px}.position-title-block>span{font:650 clamp(64px,6.5vw,92px)/1 Manrope,sans-serif;letter-spacing:-.065em;color:var(--green)}.position-title-block h2{font-size:36px;margin:9px 0 22px}.orientation-facts{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:25px 0}.orientation-facts>div{display:flex;flex-direction:column;gap:4px}.orientation-facts span{font-size:12px;color:var(--muted)}.orientation-facts b{font-size:15px;font-weight:600}.related-links,.pass-nav{display:flex;padding:6px;background:#f1f5f2;border-radius:12px;gap:3px;margin:20px 0 0}.related-links button,.pass-nav button{flex:1;background:none;border-radius:8px;padding:11px 6px;font-size:14px;line-height:1.4;color:#667c6c}.related-links button{font-weight:650}.related-links button>span{display:block;font-size:11px;line-height:1.6;font-weight:400}.pass-nav button>span{margin-right:7px;color:#94a89a;font-size:11px}.related-links button.selected,.pass-nav button.selected{color:var(--green);background:white;box-shadow:0 2px 5px #1238250c}.pass-nav button.selected>span{color:var(--green)}.related-links button:hover:not(.selected),.pass-nav button:hover:not(.selected){background:#e5eee8}.position-gallery{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:25px}.position-gallery>button{text-align:left;background:#fff;padding:0;border:1px solid var(--line);border-radius:18px;overflow:hidden}.position-gallery>button:hover{border-color:#76b694;transform:translateY(-3px)}.position-thumb{height:230px;overflow:hidden;padding:5px}.position-thumb img{width:100%;height:100%;object-fit:contain;display:block}.position-card-caption{padding:15px 17px 19px;display:flex;gap:10px;align-items:center;background:var(--soft)}.position-card-caption strong{font:650 28px/1 Manrope,sans-serif;letter-spacing:-.05em;color:var(--green)}.position-card-caption span{font-size:13px}.position-card-caption b{margin-left:auto;font-weight:400}.stage-overview{display:grid;grid-template-columns:1.25fr 1fr;gap:45px;align-items:center}.stage-list button{display:flex;align-items:center;width:100%;gap:19px;padding:21px 2px;background:none;border-bottom:1px solid var(--line);text-align:left}.stage-list button>span{font:500 17px/1 Manrope,sans-serif;color:#91aa9a}.stage-list button>div{flex:1}.stage-list h3{font-size:20px;margin-bottom:4px}.stage-list p{font-size:14px;margin:0}.stage-list button>b{font-size:20px;color:#88a292;font-weight:400}.stage-list button:hover h3{color:var(--green)}.stage-list .note{font-size:13px}.stage-overview .image-open img{height:auto;max-height:470px}
/* Photography, diagrams and tables */
.teaching-figure{margin:0;min-width:0}.image-open{display:block;background:#f6f8f6;border:1px solid #e8eee9;border-radius:17px;width:100%;padding:16px;line-height:0;position:relative;overflow:hidden;cursor:zoom-in}.image-open img{display:block;width:100%;height:390px;object-fit:contain}.cad-visual .image-open,.stage-overview .image-open{background:white;border:0;padding:0;border-radius:0}.cad-visual .image-open img{height:auto;aspect-ratio:16/11;object-fit:contain}.teaching-figure figcaption{font-size:12px;line-height:1.65;color:#839088;margin:12px 1px 0}.teaching-figure figcaption a{color:inherit}.cad-visual figcaption{padding-left:8px;font-size:11px}.expand-hint{position:absolute;bottom:14px;right:14px;line-height:1.3;padding:9px 12px;background:#f1f6f3eb;color:var(--green);border:1px solid #deebe2;border-radius:8px;font-size:12px;opacity:0;transition:opacity .2s}.image-open:hover .expand-hint,.image-open:focus-visible .expand-hint{opacity:1}.photo{background:#f0f4f1;padding:16px;border-radius:17px;display:flex;justify-content:center;align-items:center;min-height:285px}.photo-btn{width:100%;padding:0;background:none;cursor:zoom-in}.photo-btn img{width:100%;max-height:340px;object-fit:contain;display:block}.photo-wrap figcaption{font-size:12px;line-height:1.7;color:#7b8a80;margin-top:12px}.photo-wrap figcaption a{color:inherit}.term-list{margin-top:25px}.term-list p{display:flex;gap:15px;justify-content:space-between;border-top:1px solid var(--line);font-size:14px;padding:10px 0;margin:0}.bevel-comparison{display:grid;grid-template-columns:1fr 1fr;gap:35px}.bevel-comparison>div{padding:26px;background:var(--soft);border-radius:18px}.bevel-comparison h3{font-size:24px}.bevel-comparison .image-open{background:white;margin-top:20px}.bevel-comparison .image-open img{height:170px}.bevel-comparison p{font-size:16px}.two-photo{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:25px 0}.two-photo .image-open img{height:185px}.test-gallery,.ndt-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;margin-top:30px}.test-gallery img{height:300px}.ndt-gallery img{height:220px}.ndt-gallery h3{font-size:20px;margin-top:20px}.ndt-gallery p{font-size:16px}.table-wrap{width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:14px;margin:22px 0}.table-wrap table{width:100%;border-collapse:collapse;font-size:15px;text-align:left}.table-wrap th{font-size:12px;color:#6c7d72;background:var(--soft);font-weight:600;padding:15px 20px}.table-wrap td{border-top:1px solid var(--line);padding:17px 20px;line-height:1.55}.table-wrap td:first-child{font-weight:650;color:var(--green)}.formula{display:flex;gap:10px;margin:30px 0}.formula button{border:1px solid #4a6c57;border-radius:12px;padding:4px 14px 10px;background:none;color:#b9ccc0;font:500 60px/1.2 Manrope,sans-serif;letter-spacing:-.06em;min-width:60px}.formula button.active{background:#fff;color:var(--green);border-color:white}.explain{min-height:125px}.explain h3{font-size:21px}.explain p{font-size:16px;margin:12px 0 0}
/* Calculator */
.controls{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:30px 0}.control label{display:block;font-size:14px;font-weight:550;margin-bottom:9px}.control select{width:100%;padding:14px 13px;border:1px solid #cbdad0;background:white;color:var(--ink);border-radius:10px;font-size:16px}.calc-result{padding:40px;position:relative;overflow:hidden}.calc-result .eyebrow{font-size:13px;letter-spacing:.04em}.range-label{font-size:14px;color:#c4d4c8;margin-top:25px}.range-result{font:550 clamp(50px,5.5vw,80px)/1.2 Manrope,sans-serif;letter-spacing:-.065em;margin:10px 0 28px;white-space:nowrap}.range-result small{font-size:30px;font-weight:400;color:#aacbb5;letter-spacing:-.03em}.calc-current{display:flex;align-items:center;justify-content:space-between;font-size:14px;color:#c2d6c8}.calc-current strong{font:500 29px/1 Manrope,sans-serif;letter-spacing:-.03em;color:white}.calc-result input{accent-color:#8aebba;width:100%;cursor:pointer;margin:25px 0 17px;height:7px}.reset-range{display:block;padding:9px 0;background:none;border-bottom:1px solid #668d73;color:#c2d8ca;font-size:12px}.calc-result>p{font-size:12px!important;line-height:1.7!important;color:#a8c4b3;margin-top:24px!important}.photo-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}.photo-tabs button{padding:10px 16px;background:#f1f5f2;color:#68806f;border-radius:9px;font-size:14px;border:1px solid transparent}.photo-tabs button[aria-selected=true]{background:#e3f3e9;color:var(--green);border-color:#b7d9c5}.photo-study{display:grid;grid-template-columns:1.1fr 1fr;gap:50px;align-items:center}.photo-study .photo{min-height:330px}.photo-study h3{font-size:30px;line-height:1.2;letter-spacing:-.04em;margin-top:12px}
/* Quiz */
.quiz-wrap{max-width:1000px;margin:0 auto;padding:8px 24px 12px}.quiz-wrap>.eyebrow{margin-bottom:23px}.quiz-count{font-size:12px;letter-spacing:.03em;color:#85a28f;font-weight:550}.quiz-question{font-size:clamp(27px,3vw,42px);line-height:1.28;letter-spacing:-.04em;max-width:880px;margin:15px 0 30px}.answers{display:grid;grid-template-columns:1fr 1fr;gap:13px}.answer{display:flex;align-items:center;gap:16px;text-align:left;background:#f7f9f7;border:1px solid var(--line);border-radius:13px;padding:18px 20px;min-height:84px;font-size:16px;line-height:1.55}.answer>b{display:flex;align-items:center;justify-content:center;width:28px;height:28px;flex-shrink:0;border-radius:6px;border:1px solid #cfded3;font-size:12px;color:#85a18e;font-weight:600}.answer:hover:not(:disabled){background:#ecf5ee;border-color:#a9ceb6}.answer:disabled{opacity:1}.answer.correct{background:#e7f5eb;border-color:#4ba373}.answer.correct>b{background:var(--green);color:white;border-color:var(--green)}.answer.wrong{background:#fbefeb;border-color:#d49b86}.feedback{min-height:79px;padding:17px 0 0;font-size:14px}.feedback b{color:var(--green);font-weight:600}.feedback p{font-size:15px;line-height:1.6;margin:5px 0}.quiz-actions{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:22px}.score{font:600 100px/1.2 Manrope,sans-serif;color:var(--green);letter-spacing:-.06em}
/* Reference and dialogs */
.archive-intro{display:flex;justify-content:space-between;gap:25px;align-items:center}.archive-intro .lead{margin:0;max-width:700px}.archive-intro .primary{white-space:nowrap}.original-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:17px;margin:30px 0}.original-grid button{border:1px solid var(--line);padding:0;background:white;border-radius:10px;overflow:hidden}.original-grid img{width:100%;display:block;aspect-ratio:16/9;object-fit:contain}.original-grid span{display:block;font-size:12px;padding:7px;color:var(--muted)}.sources h3{font-size:21px}.sources p,.sources li{font-size:14px;line-height:1.7}.sources ul{padding-left:20px}.sources li{margin:9px 0}.endline{font:650 54px/1.08 Manrope,sans-serif;letter-spacing:-.06em;color:var(--green);margin:35px 0}.closing-contact{margin-top:30px;padding:22px 0 0;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:6px 30px;font-size:12px}.closing-contact span{color:var(--muted)}dialog{border:1px solid #e0e9e3;border-radius:22px;background:white;color:var(--ink);padding:32px;width:min(950px,calc(100% - 32px));max-height:90dvh;box-shadow:0 24px 120px #0c2a213d}dialog::backdrop{background:#122e2299;backdrop-filter:blur(5px)}.dialog-heading{display:flex;align-items:start;justify-content:space-between;gap:20px;margin-bottom:20px}.dialog-heading small{color:var(--green);font-size:12px;letter-spacing:.12em}.dialog-heading h2{font-size:38px;margin:7px 0}.close{background:#f0f5f2;border:0;border-radius:50%;width:36px;height:36px;padding:0;flex-shrink:0;font-size:18px;line-height:1;color:var(--muted)}#index{display:grid;grid-template-columns:1fr 1fr;gap:0 25px}#index button{display:flex;gap:15px;padding:15px 5px;text-align:left;background:none;border-bottom:1px solid var(--line);font-size:14px;line-height:1.5}#index button span{color:#98afa0;min-width:24px;font-size:12px}#index button.active{color:var(--green);font-weight:650}#index button:hover{color:var(--green)}#zoom{width:min(1400px,calc(100% - 28px));text-align:center}#zoom .close{display:block;margin:0 0 0 auto}#zoom img{max-width:100%;width:100%;max-height:75dvh;object-fit:contain}#zoom p{font-size:14px;line-height:1.5;margin:10px auto 0;max-width:800px}#originalDialog{width:min(1400px,calc(100% - 28px));padding:24px}#originalImage{width:100%;max-height:72dvh;object-fit:contain;display:block}.original-toolbar,.original-controls{display:flex;align-items:center;justify-content:space-between;gap:17px}.original-toolbar{padding-bottom:20px}.original-toolbar h3{font-size:18px;margin:0}.original-toolbar select{border:1px solid var(--line);border-radius:8px;background:white;padding:8px 12px;font-size:14px}.original-toolbar a{font-size:13px}.original-controls{padding-top:12px;font-size:13px}.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}
footer{max-width:1440px;width:calc(100% - 80px);margin:0 auto;height:94px;display:grid;grid-template-columns:1fr auto;column-gap:40px;align-content:center;align-items:center}.progress-copy{display:flex;align-items:center;justify-content:space-between;gap:18px;font-size:12px;color:#687e6e;max-width:375px}.progress-copy>span:first-child{font-weight:550}.progress-copy>span:last-child{color:#93a69a;font-size:12px;white-space:nowrap}.progress-track{height:3px;border-radius:3px;max-width:375px;background:#dce7df;grid-column:1;overflow:hidden;margin-top:10px}.progress-track>div{height:100%;background:#229864;border-radius:3px;transition:width .3s}footer nav{grid-column:2;grid-row:1/3;display:flex;align-items:center;gap:14px}footer .quiet{font-size:14px}.next{min-height:44px;padding:10px 19px;gap:33px;border-radius:10px;font-size:13px}
@media(min-width:1600px){main{padding:54px 60px}.cover-intro h1{font-size:86px}.cover-editorial{min-height:540px}.cad-lesson{min-height:520px}}
@media(max-width:1150px){header{padding:0 30px;gap:23px;height:84px}main{width:calc(100% - 48px);padding:32px;min-height:calc(100dvh - 178px)}footer{width:calc(100% - 64px)}.course-label{padding-left:20px}.split{gap:32px;min-height:450px}.cad-lesson{gap:22px;grid-template-columns:1.2fr 1fr}.cad-copy{padding-left:0}.cad-copy h2{font-size:35px}.cad-copy .lead{font-size:17px}.position-title-block>span{font-size:77px}.position-title-block h2{font-size:30px}.orientation-facts{gap:10px}.orientation-facts b{font-size:14px}.position-gallery{grid-template-columns:repeat(2,1fr);gap:20px}.position-thumb{height:220px}.position-card-caption{padding:13px 20px}.position-card-caption span{font-size:15px}.credential-grid{gap:18px}.credential-grid>div{padding:24px}.ppe-grid{gap:23px}.dark-block{padding:30px}.range-result{font-size:62px}.formula{gap:8px}.formula button{font-size:52px;padding:4px 11px 8px;min-width:50px}.cover-intro h1{font-size:64px}.cover-process{font-size:23px}.cover-intro .lead{font-size:18px}.cover-position-list{margin-top:25px}.cover-position-list small{display:none}.stage-overview{gap:30px}.section-heading>p{font-size:14px}.test-gallery,.ndt-gallery{gap:20px}.image-open img{height:350px}}
@media(max-width:900px){.course-label{display:none}.cover-editorial{grid-template-columns:1fr 1fr;gap:15px}.cover-intro h1{font-size:56px}.cover-intro{padding-left:0}.cover-position-list{gap:6px}.object-caption{flex-direction:column;align-items:start;gap:8px}.cover-colophon{padding-left:0;padding-right:0;gap:20px}.cad-lesson{grid-template-columns:1fr;gap:24px}.cad-visual{max-width:760px;width:100%;margin:auto}.cad-copy{display:block;padding:0;max-width:none}.cad-copy .lead{font-size:19px}.position-title-block{display:flex;align-items:center;gap:25px}.position-title-block h2{margin:0}.cad-copy .orientation-facts{max-width:460px}.cad-copy .rows{display:grid;grid-template-columns:1fr 1fr;gap:24px}.cad-copy>.source-note{max-width:70ch}.cad-visual .image-open img{max-height:460px}.pass-lesson .cad-copy h2{font-size:40px}.ppe-grid{grid-template-columns:repeat(2,1fr)}.credential-grid{grid-template-columns:1fr}.credential-grid>div{padding:25px}.credential-code{font-size:36px;margin-bottom:16px}.credential-grid p{margin-top:12px}.credential-grid small{min-height:0}.section-heading{align-items:start}.section-heading>p{max-width:240px}.visual-lesson{gap:26px}.stage-overview{grid-template-columns:1fr;gap:20px}.stage-overview .teaching-figure{max-width:730px;margin:auto}.stage-list{display:grid;grid-template-columns:1fr 1fr;gap:0 25px}.stage-list .note{grid-column:1/-1}.career-grid{grid-template-columns:repeat(2,1fr)}.quiz-wrap{padding:0}.wide-heading{display:block}.wide-heading p{max-width:650px}.photo-study{gap:30px}.archive-intro{align-items:start;flex-direction:column}.original-grid{grid-template-columns:repeat(4,1fr)}}
@media(max-width:700px){header{padding:0 19px;height:77px;gap:8px}.brand{font-size:11px;gap:8px}.brand img{width:39px;height:39px}.brand small{font-size:7px}.header-actions{gap:0}.header-actions .quiet{font-size:12px;padding:9px}#originalBtn{display:none}#fullBtn{margin-left:4px;font-size:20px;padding:3px 9px}#fullBtn span{display:none}main{width:calc(100% - 24px);padding:28px 22px 24px;border-radius:20px;min-height:calc(100dvh - 170px)}h2{font-size:34px;letter-spacing:-.05em;margin:12px 0 23px}h3{font-size:19px}.eyebrow{font-size:11px}.lead{font-size:17px;line-height:1.65;margin:16px 0 24px}p{font-size:16px}.split,.visual-lesson,.two-cols,.photo-study{grid-template-columns:1fr;gap:32px;min-height:0}.cover-editorial{grid-template-columns:1fr;gap:8px}.cover-intro{padding:9px 4px 6px}.cover-intro h1{font-size:57px;line-height:1.06}.cover-intro .eyebrow{margin-bottom:20px}.cover-process{font-size:24px}.cover-process span{font-size:17px}.cover-intro .lead{font-size:18px;margin:20px 0 24px}.cover-intro .primary{min-height:46px}.cover-position-list{margin-top:24px}.cover-position-list small{display:block}.cover-object{padding-top:10px}.cover-object img{max-height:350px}.object-caption{flex-direction:row;align-items:center;font-size:12px;margin:5px 2px 0;gap:10px;padding-top:13px}.object-caption button{font-size:11px}.cover-colophon{margin-top:21px;padding-top:18px;gap:16px;flex-direction:column}.cover-colophon>div{font-size:11px}.section-heading{display:block;margin-bottom:15px}.section-heading h2{margin-bottom:15px}.section-heading>p{max-width:none;font-size:14px}.agenda-grid{grid-template-columns:1fr;gap:0}.agenda-grid button{padding:21px 0;gap:17px}.agenda-grid button>span{font-size:20px}.agenda-grid h3{font-size:21px}.agenda-grid p{font-size:14px}.technical-note{padding:17px 19px}.technical-note p{font-size:14px}.class-details{font-size:14px}.dark-block{padding:27px;border-radius:18px}.big-word{font-size:75px}.ppe-grid{gap:20px}.ppe-grid h3{font-size:17px}.ppe-grid p{font-size:14px}.checklist>label{padding:17px;gap:13px}.checklist b{font-size:15px}.checklist small{font-size:13px}.position-gallery{grid-template-columns:1fr 1fr;gap:12px}.position-thumb{height:150px;padding:0}.position-card-caption{gap:8px;padding:12px 11px;flex-wrap:wrap}.position-card-caption strong{font-size:25px}.position-card-caption span{font-size:11px}.position-card-caption b{display:none}.cad-lesson{gap:26px;min-height:0}.cad-visual .image-open{margin:0 -10px;width:calc(100% + 20px)}.cad-visual figcaption{font-size:11px;padding:0}.cad-copy h2,.pass-lesson .cad-copy h2{font-size:35px}.cad-copy .lead{font-size:17px}.cad-copy .rows{display:block}.cad-copy .row{padding:17px 0}.related-links,.pass-nav{margin-top:17px;padding:4px;border-radius:10px}.related-links button,.pass-nav button{padding:10px 3px;font-size:13px}.related-links button>span{font-size:9px}.pass-nav button>span{display:block;margin:0 0 2px;font-size:10px}.position-title-block>span{font-size:73px}.position-title-block h2{font-size:29px}.position-title-block{gap:22px}.orientation-facts{margin:22px 0;padding:18px 0}.orientation-facts span{font-size:11px}.orientation-facts b{font-size:14px}.stage-list{display:block}.stage-list button{gap:18px;padding:18px 0}.stage-list h3{font-size:19px}.stage-list p{font-size:13px}.image-open{padding:12px}.image-open img{height:290px}.expand-hint{font-size:10px;padding:7px 9px;opacity:1;bottom:8px;right:8px}.cad-visual .expand-hint,.stage-overview .expand-hint{opacity:0}.teaching-figure figcaption{font-size:11px}.bevel-comparison{grid-template-columns:1fr;gap:23px}.bevel-comparison>div{padding:22px}.two-photo{gap:14px}.two-photo .image-open img{height:130px}.table-wrap table{min-width:500px;font-size:14px}.table-wrap th{font-size:11px;padding:12px 15px}.table-wrap td{padding:14px 15px}.controls{gap:14px}.control label{font-size:12px}.control select{font-size:14px;padding:12px 10px}.range-result{font-size:66px}.range-result small{font-size:28px}.calc-current strong{font-size:28px}.formula button{font-size:50px}.formula{justify-content:space-between;gap:7px}.formula button{min-width:48px;padding:5px 10px 8px}.photo-tabs{gap:6px}.photo-tabs button{padding:9px 12px;font-size:12px}.photo-study .photo{min-height:240px}.photo-study h3{font-size:29px}.steps{grid-template-columns:1fr 1fr;gap:25px}.step h3{font-size:18px}.step p{font-size:15px}.test-gallery,.ndt-gallery{grid-template-columns:1fr;gap:26px}.test-gallery img,.ndt-gallery img{height:290px}.career-grid{gap:13px}.career-grid>div{padding:18px}.career-grid h3{font-size:17px}.career-grid p{font-size:14px}.answers{grid-template-columns:1fr;gap:11px}.answer{min-height:68px;font-size:15px;padding:16px;gap:13px}.quiz-question{font-size:29px;margin:14px 0 24px}.quiz-actions{gap:12px;align-items:center}.quiz-actions .quiet{padding:10px 0;font-size:12px}.quiz-actions .primary{font-size:12px;padding:12px 15px;gap:9px}.feedback{min-height:72px}.feedback p{font-size:14px}.score{font-size:80px}.original-grid{grid-template-columns:repeat(3,1fr);gap:11px}.evidence-bar{font-size:11px;padding-top:15px;margin-top:26px;gap:12px}.evidence-bar button{font-size:11px}.evidence-bar span{max-width:55%}.endline{font-size:48px}.sources p,.sources li{font-size:13px}footer{width:calc(100% - 40px);height:89px;column-gap:14px}.progress-copy{flex-direction:column;align-items:start;gap:3px;font-size:11px;line-height:1.4}.progress-copy>span:last-child{font-size:10px}.progress-track{margin-top:7px}footer nav{gap:7px}footer .quiet{padding:10px;font-size:17px}footer .quiet span{display:none}.next{padding:11px 15px;font-size:12px;gap:18px;min-height:43px}.next span{font-size:18px}dialog{padding:23px;border-radius:18px}#index{grid-template-columns:1fr}#index button{font-size:14px}.dialog-heading h2{font-size:32px}#zoom{padding:16px}#zoom p{font-size:12px}#originalDialog{padding:16px}.original-toolbar{flex-wrap:wrap;gap:10px}.original-toolbar h3{font-size:15px}.original-toolbar select{font-size:12px;padding:6px}.original-toolbar a{font-size:12px}.original-toolbar .close{margin-left:auto}.original-controls .quiet{font-size:12px;padding:8px}}
@media(max-width:380px){.brand>span{display:none}.cover-intro h1{font-size:50px}.range-result{font-size:55px}.position-gallery{grid-template-columns:1fr}.position-thumb{height:225px}.position-card-caption span{font-size:14px}.ppe-grid,.career-grid{grid-template-columns:1fr}.formula button{font-size:42px;min-width:40px}.controls{grid-template-columns:1fr}.cover-position-list small{font-size:10px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
@media print{body{background:white}header,.header-actions,footer,.evidence-bar{display:none}main{width:100%;border:0;box-shadow:none;padding:0}.expand-hint{display:none}}

/* Pedagogical sequence and grouped course index */
.agenda-intro{font-size:17px;max-width:77ch;margin:8px 0 27px}.learning-bridge{font-size:14px;color:#537b62;background:#f2f7f3;padding:15px 20px;border-radius:11px;margin:27px 0 0;line-height:1.7}.index-group{break-inside:avoid;margin-bottom:25px}.index-group h3{font:650 12px/1.6 'DM Sans',sans-serif;letter-spacing:.055em;text-transform:uppercase;color:var(--green);padding-bottom:9px;border-bottom:1px solid #accdb8;margin:0}.index-group>button{width:100%}#index{display:block;columns:2;column-gap:32px}.index-group button{break-inside:avoid}@media(max-width:700px){#index{columns:1}.agenda-intro{font-size:16px}.learning-bridge{font-size:13px;padding:14px 17px}.index-group h3{font-size:12px}}
/* Newly authored learning material */
.risk-grid,.electrode-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:32px}.risk-grid article{padding:28px;border-radius:18px;background:#f1f6f3;position:relative}.risk-number{font:500 40px/1.2 Manrope,sans-serif;color:#9cb9a8;display:block;margin-bottom:27px}.risk-grid h3{font-size:27px;margin-bottom:10px}.risk-grid article>b{font-size:13px;font-weight:600;color:var(--green)}.risk-grid p{font-size:16px;margin-bottom:0}.credential-grid>article{background:var(--soft);padding:28px;border-radius:17px}.bevel-comparison>article{padding:26px;background:var(--soft);border-radius:18px}.career-grid>article{padding:23px;background:var(--soft);border-radius:15px}.electrode-cards article{padding:30px;background:var(--soft);border-radius:18px;border-top:3px solid #7bbaa0}.electrode-code{font:650 clamp(30px,3vw,45px)/1.3 Manrope,sans-serif;letter-spacing:-.05em;color:var(--green);margin-bottom:28px}.electrode-cards .eyebrow{font-size:11px;margin-bottom:17px}.electrode-cards h3{font-size:23px}.electrode-cards p{font-size:16px;margin-bottom:0}.coating-layout{display:grid;grid-template-columns:1.6fr .7fr;gap:32px;align-items:center}.coating-layout .table-wrap{margin-top:12px}.polarity-key{padding:8px 24px;border-left:1px solid var(--line)}.polarity-key>div{padding:20px 0;display:flex;flex-direction:column;gap:5px}.polarity-key b{font:650 23px/1.3 Manrope,sans-serif;color:var(--green)}.polarity-key span{font-size:14px;color:var(--muted)}.technique-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:45px;align-items:center}.technique-layout .image-open{border:0;background:#fff}.technique-layout .rows{margin-top:0}.ndt-gallery .image-open{background:white;padding:0}.ndt-gallery .image-open img{height:280px}.ndt-gallery h3{font-size:20px}.image-open img[src$=".svg"]{background:white}.photo-study .image-open{background:white;border:0;padding:0}.photo-study .image-open img{height:330px}.ppe-layout{display:grid;grid-template-columns:minmax(280px,.9fr) minmax(0,1.1fr);gap:48px;align-items:center}.ppe-visual{max-width:460px;margin:0 auto}.ppe-stage{position:relative;max-width:420px;margin:auto}.ppe-stage>img{display:block;width:100%;height:auto}.ppe-pin{position:absolute;transform:translate(-50%,-50%);width:32px;height:32px;border-radius:50%;border:2px solid white;background:var(--green);color:white;box-shadow:0 2px 7px #14372930;font-size:12px;line-height:1;font-weight:700;display:flex;align-items:center;justify-content:center}.ppe-pin.selected{background:var(--ink);box-shadow:0 0 0 5px #22a66c30}.ppe-visual>.source-note{font-size:11px;max-width:370px;text-align:center;margin:12px auto 0}.ppe-copy>p{font-size:16px}.ppe-options{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:23px 0}.ppe-options button{display:flex;align-items:center;gap:10px;padding:12px 14px;border:1px solid var(--line);border-radius:9px;background:white;text-align:left;font-size:14px}.ppe-options button>span{font-size:11px;color:#8ca694}.ppe-options button.selected{background:#e9f5ee;border-color:#8abda0;color:var(--green)}.ppe-detail{background:var(--soft);border-radius:16px;padding:25px;min-height:250px}.ppe-detail .eyebrow{font-size:11px;margin-bottom:10px}.ppe-detail h3{font-size:23px}.ppe-detail p{font-size:15px;line-height:1.7;margin:12px 0}.ppe-check{border-top:1px solid #d3e2d8;padding-top:16px;margin-top:19px}.ppe-check>b{font-size:13px;color:var(--green)}.ppe-check p{margin:6px 0 0;font-size:14px}.study-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px 36px;margin-top:30px}.study-grid>section{padding:23px 0;border-top:1px solid var(--line)}.study-grid h3{font-size:21px}.study-grid p{font-size:16px;line-height:1.6;margin:11px 0 15px}.study-grid .text-button{font-size:14px}.study-bottom{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center;margin-top:35px}.study-bottom>div>h3{font-size:20px}.study-code{background:var(--soft);padding:30px;border-radius:17px}.study-code>b{display:block;font:600 40px/1.2 Manrope,sans-serif;letter-spacing:-.04em;margin:18px 0;color:var(--green)}.study-code p{font-size:16px}.study-code .text-button{font-size:14px}.visual-lesson .image-open:has(img[src$=".svg"]){padding:0;background:white;border:0}.visual-lesson .image-open img[src$=".svg"]{height:auto;max-height:470px;aspect-ratio:16/11}.ppe-copy h2{font-size:clamp(36px,3.5vw,50px)}
@media(max-width:1000px){.ppe-layout{gap:26px;grid-template-columns:.8fr 1.2fr}.ppe-detail{padding:21px}.coating-layout{grid-template-columns:1fr;gap:10px}.polarity-key{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;padding:0;border:0}.polarity-key b{font-size:20px}.electrode-cards{gap:16px}.electrode-cards article{padding:22px}.risk-grid{gap:16px}.risk-grid article{padding:22px}}
@media(max-width:700px){.ppe-layout{grid-template-columns:1fr;gap:28px}.ppe-visual{max-width:300px}.ppe-copy h2{font-size:34px}.ppe-options{gap:8px}.ppe-options button{font-size:13px;padding:11px 12px}.ppe-detail{min-height:0;padding:23px}.ppe-detail h3{font-size:23px}.ppe-detail p{font-size:15px}.ppe-pin{width:30px;height:30px}.risk-grid,.electrode-cards{grid-template-columns:1fr;gap:18px}.risk-grid article{padding:25px}.risk-number{font-size:31px;margin-bottom:15px}.risk-grid h3{font-size:24px}.electrode-cards article{padding:26px}.electrode-code{font-size:39px;margin-bottom:19px}.credential-grid>article{padding:24px}.bevel-comparison>article{padding:21px}.career-grid>article{padding:18px}.polarity-key{grid-template-columns:1fr}.polarity-key>div{padding:13px 0;border-bottom:1px solid var(--line)}.technique-layout,.study-bottom,.study-grid{grid-template-columns:1fr;gap:23px}.study-grid>section{padding:20px 0 0}.study-code{padding:25px}.study-code>b{font-size:36px}.ndt-gallery .image-open img{height:auto;aspect-ratio:16/11}.photo-study .image-open img{height:auto;aspect-ratio:16/11}.visual-lesson .image-open img[src$=".svg"]{max-height:none}.header-actions #studyBtn{font-size:11px;padding:8px}.ppe-visual>.source-note{font-size:11px}}
.ndt-study{display:grid;grid-template-columns:1.35fr 1fr;gap:40px;align-items:center}.ndt-study .image-open{background:white;border:0;padding:0}.ndt-study .image-open img{height:auto;aspect-ratio:16/11;max-height:470px}.ndt-study h3{font-size:29px;margin-top:12px}.ndt-study .lead{font-size:18px}.ndt-study .row{padding:14px 0}.ndt-study .row h3{font-size:17px;margin-top:0}.ndt-study .row p{font-size:15px}.ndt-study .rows{margin-top:20px}@media(max-width:900px){.ndt-study{grid-template-columns:1fr;gap:28px}.ndt-study .teaching-figure{max-width:740px;margin:auto}}@media(max-width:700px){.ndt-study h3{font-size:27px}.ndt-study .lead{font-size:17px}.ndt-study .image-open img{max-height:none}}

/* Visible tool access and complete PPE annotations. */
.calculator-shortcut{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:11px 18px;border-radius:10px;background:var(--green);color:#fff;font-size:14px;font-weight:650;white-space:nowrap}.calculator-shortcut:hover{background:#096544}.ppe-visual{width:100%;max-width:440px}.ppe-stage{width:100%;max-width:300px}.ppe-leaders{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}.ppe-leaders path{fill:none;stroke:#789d89;stroke-width:1.5;vector-effect:non-scaling-stroke}.ppe-leaders circle{fill:#789d89;stroke:white;stroke-width:.5}.ppe-leaders .selected path{stroke:var(--green);stroke-width:3}.ppe-leaders .selected circle{fill:var(--green)}.ppe-pin{width:34px;height:34px;font-size:14px}.ppe-accessories{position:relative;margin:15px 0 0;padding-bottom:46px}.ppe-accessories>img{display:block;width:100%;aspect-ratio:3/1;object-fit:contain}.ppe-accessory-options{position:absolute;inset:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px}.ppe-accessory{background:transparent;border:1px solid transparent;border-radius:12px;display:flex;align-items:flex-end;justify-content:center;padding:9px 4px}.ppe-accessory>span{display:flex;align-items:center;gap:6px;font-size:13px;font-weight:600;white-space:nowrap}.ppe-accessory b{display:inline-flex;width:25px;height:25px;align-items:center;justify-content:center;border-radius:50%;background:var(--green);color:white;font-size:13px}.ppe-accessory:hover{border-color:#a6c8b6}.ppe-accessory.selected{border:2px solid var(--green);box-shadow:0 0 0 3px #07845915}.ppe-accessory.selected b{background:var(--ink)}.ppe-options button>span{font-size:13px;color:#547962}.ppe-visual>.source-note{font-size:12px;line-height:1.5;margin-top:13px}.ppe-detail .eyebrow{font-size:12px}
@media(max-width:1150px){header{gap:16px;padding-inline:24px}.header-actions{gap:3px}.header-actions .quiet{padding-inline:10px}.course-label{padding-left:16px}#fullBtn{margin-left:3px}}
@media(max-width:700px){header{height:auto;min-height:112px;flex-wrap:wrap;padding:14px 18px;gap:10px}.header-actions{width:100%;margin:0;justify-content:space-between;gap:3px}.header-actions .calculator-shortcut{font-size:13px;padding:10px 13px}.header-actions .quiet{font-size:13px;padding:9px}.header-actions #studyBtn{font-size:12px;padding:8px}#fullBtn{margin-left:0}.ppe-visual{max-width:400px}.ppe-stage{max-width:270px}.ppe-accessory>span{font-size:12px}.ppe-accessory b{width:24px;height:24px}.ppe-pin{width:32px;height:32px}.ppe-accessories{padding-bottom:44px}}
@media(max-width:400px){.ppe-accessory>span{flex-direction:column;gap:4px}.ppe-accessories{padding-bottom:66px}.header-actions{gap:0}.header-actions .calculator-shortcut{font-size:12px;padding-inline:10px}.header-actions #studyBtn{font-size:11px;padding-inline:6px}.header-actions #contentsBtn{font-size:12px;padding-inline:6px}#fullBtn{padding-inline:7px}}

/* Shared course module navigation. */
.module-nav{display:flex;align-items:center;gap:6px;border-left:1px solid #cddbd2;padding-left:22px}.module-nav a{display:flex;align-items:center;gap:6px;padding:8px 11px;border-radius:9px;text-decoration:none;font-size:12px;color:var(--muted)}.module-nav b{font-size:14px}.module-nav a[aria-current=page]{background:#e3efe8;color:var(--green)}.module-nav a:hover{background:#dceae1}@media(max-width:1050px){.module-nav{padding-left:10px;gap:2px}.module-nav a{padding:7px 8px}.brand>span{font-size:12px}.header-actions .quiet{padding-inline:8px}.header-actions #fullBtn span{display:none}}@media(max-width:700px){.module-nav{margin-left:auto;border:0;padding:0}.module-nav a{padding:7px 10px;font-size:12px}.module-nav b{font-size:14px}header{gap:10px 8px}}@media(max-width:380px){.module-nav a{padding:7px 11px}}