@font-face{font-family:Museum;src:url('fonts/museum-sans.woff2') format('woff2');font-display:swap}*{box-sizing:border-box}body{margin:0;color:#15314b;background:#f3f7fb;font-family:Museum,system-ui,sans-serif;font-size:17px;line-height:1.6}a{color:#07549a;text-underline-offset:.2em}button,select,textarea{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{min-height:48px;border:1px solid #b3c6d6;border-radius:10px;background:white;color:#163b5d;padding:.65rem 1rem;cursor:pointer;line-height:1.4}button:hover{background:#eaf3fb;border-color:#07549a}button:disabled{cursor:default;opacity:.6}button:focus-visible,a:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #c06500;outline-offset:4px}.primary{background:#07549a;color:#fff;border-color:#07549a}.primary:hover{background:#03447f;color:#fff}.school-header{display:flex;align-items:center;justify-content:space-between;gap:1rem;background:white;padding:18px max(22px,calc((100vw - 1200px)/2));border-bottom:1px solid #d7e3ee}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:14px;font-weight:800}.brand small{display:block;font-weight:500}nav{display:flex;align-items:center;gap:18px}main{max-width:1200px;margin:auto;padding:32px 24px 60px}.eyebrow{font-size:14px;letter-spacing:.12em;font-weight:800;color:#07549a;margin:0}h1{font-size:clamp(1.9rem,4vw,3rem);line-height:1.16;letter-spacing:-.025em;margin:12px 0}h2{line-height:1.25;font-size:1.6rem}h3{line-height:1.35}.program-head>p:not(.eyebrow){max-width:780px}.settings{display:flex;flex-wrap:wrap;gap:18px;align-items:end;margin:24px 0 14px}label{font-size:15px;font-weight:700}select{display:block;min-height:48px;max-width:100%;padding:8px 38px 8px 12px;border:1px solid #9bb4ca;border-radius:9px;background:white;color:#15314b}.privacy,.note,.meta{font-size:14px;color:#425d73}.privacy{border-left:3px solid #9cbcd9;padding-left:12px}.mission-banner{background:#07549a;color:white;border-radius:18px;padding:24px;display:flex;align-items:center;gap:24px;justify-content:space-between;margin:30px 0}.mission-banner h2{margin:0 0 8px}.mission-banner p{margin:0}.mission-banner button{flex-shrink:0}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.activity-card{background:white;border:1px solid #d4e1ec;border-radius:15px;overflow:hidden;display:flex;flex-direction:column}.card-body{padding:20px;display:flex;flex-direction:column;flex:1}.activity-card h2{font-size:1.25rem;margin:9px 0}.activity-card p{margin:4px 0 15px}.activity-card button{margin-top:auto;text-align:left}.card-number{color:#07549a;font-weight:800;font-size:14px;letter-spacing:.04em}.card-image{width:100%;height:145px;object-fit:cover;background:#dce8f2}.progress{font-size:14px;font-weight:700;color:#07549a}.activity-top{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:30px 0 20px}.lesson{background:white;border:1px solid #cfdeeb;border-radius:18px;padding:clamp(18px,4vw,36px)}.lesson h2{margin:8px 0 16px}.lesson-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:28px}.lesson-intro{font-size:1.15rem}.audio-box{background:#edf5fc;border-radius:12px;padding:18px;margin:20px 0}.audio-box audio{width:100%;display:block;margin:10px 0}.captions{font-size:16px;background:white;padding:12px;border-radius:7px}.caption-active{border-left:4px solid #07549a}.stage{margin:25px 0}.source-image{margin:0}.source-image img{width:100%;max-height:320px;object-fit:contain;border-radius:10px;background:#edf2f6}.source-image figcaption{font-size:14px;margin:8px 0;overflow-wrap:anywhere}.source-image details{font-size:14px}.compare{display:grid;grid-template-columns:1fr 1fr;gap:22px}.evidence-card{padding:16px 20px;margin:12px 0;border:1px solid #cbdbe8;border-radius:10px;background:#f7faff}.evidence-card summary{cursor:pointer;font-weight:700;min-height:44px;padding:8px 0}.order-list{padding:0;list-style:none}.order-list li{display:flex;gap:14px;align-items:center;justify-content:space-between;padding:15px;border-bottom:1px solid #d7e3ec;background:#f5f9fc}.order-list li>div:first-child{flex:1}.order-list small{display:block}.order-controls{display:flex;gap:6px}.order-controls button{padding:10px}.question{border-top:2px solid #e0ebf4;margin-top:28px;padding-top:22px}.question h3{font-size:1.3rem}.options{display:grid;gap:12px}.option{text-align:left;padding:16px 20px}.option[aria-pressed=true]{border:2px solid #07549a;background:#e7f2fc}.feedback{padding:18px;border-left:4px solid #07549a;background:#eaf3fc;margin-top:16px}.feedback p{margin:4px 0}.next-row,.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.check-row{display:flex;align-items:start;gap:12px;min-height:48px;margin:8px 0;padding:12px;background:#f1f6fb;border-radius:8px;font-size:17px;font-weight:400}.check-row input{width:22px;height:22px;flex-shrink:0;margin-top:3px;accent-color:#07549a}.frames{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.frames button{min-height:110px;text-align:left}.frames b{display:block;color:#07549a;margin-bottom:12px}.result{background:#ecf6fa;border-radius:12px;padding:24px}.chips{display:flex;flex-wrap:wrap;gap:10px}.chips button[aria-pressed=true]{background:#07549a;color:white}.mission-list{padding:0;list-style:none}.mission-list li{display:flex;justify-content:space-between;gap:12px;padding:14px 0;border-bottom:1px solid #d7e3ec;align-items:center}.mission-list span{flex:1}.writing-field{display:block;width:100%;min-height:170px;padding:14px;border:1px solid #9bb4ca;border-radius:8px;margin:10px 0}.worksheet{padding:18px;border:1px solid #cbdbe8;border-radius:10px;margin:16px 0}.sources{font-size:14px;margin-top:24px;overflow-wrap:anywhere}.sources li{margin:8px 0}dialog{max-width:900px;width:calc(100% - 32px);max-height:90dvh;border:1px solid #adc4d8;border-radius:16px;padding:24px;color:#15314b}dialog::backdrop{background:#062b4fcc}.dialog-bar{display:flex;align-items:center;justify-content:space-between;gap:15px}.dialog-bar h2{margin:0}.teacher-block{padding:20px 0;border-bottom:1px solid #cbdbe8}.teacher-block h3{margin-top:0}footer{padding:24px;text-align:center;font-size:14px;border-top:1px solid #d1dfea;background:white}.skip{position:absolute;top:-100px;left:12px;background:white;padding:12px;z-index:20}.skip:focus{top:12px}#printArea{display:none}body.print-certificate #printArea{display:block}.certificate{padding:30px;border:3px solid #07549a;background:white;text-align:center}.certificate h1{font-size:2.2rem}.certificate img{width:85px}.certificate ul{text-align:left}.work-lines{line-height:2.5}.hidden,[hidden]{display:none!important}@media(max-width:900px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-grid{grid-template-columns:1fr}.lesson-grid>aside{max-width:450px}.school-header{flex-wrap:wrap}.frames{grid-template-columns:1fr}}@media(max-width:560px){main{padding:24px 14px 40px}.school-header{padding:14px}.school-header nav{width:100%;font-size:14px;gap:12px;justify-content:space-between}.brand{font-size:13px}.grid,.compare{grid-template-columns:1fr}.mission-banner{display:block;padding:20px}.mission-banner button{margin-top:18px;width:100%}.settings{gap:12px}.settings label{flex:1;min-width:180px}.settings select{width:100%}.activity-top{align-items:start}.order-list li{flex-wrap:wrap}.order-controls{width:100%}.order-controls button{flex:1}.mission-list li{flex-wrap:wrap}.mission-list button{width:100%}.lesson h2{font-size:1.5rem}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}@media print{body{background:white;font-size:12pt}body>*{display:none!important}body>#printArea{display:block!important}#printArea{color:#111}#printArea h1{font-size:22pt}#printArea h2{font-size:17pt}#printArea h3{font-size:14pt}#printArea .teacher-block{break-inside:avoid}#printArea a{color:#111}#printArea button{display:none}.certificate{margin:10mm;break-inside:avoid}.work-lines{line-height:3}}

.embedded .school-header{display:none}.embedded main{padding-top:12px}.embedded .program-head>p:first-of-type{margin-top:0}.embedded .settings{margin-top:8px}.embedded .mission-banner{margin-top:18px}.embedded .program-head{border-bottom:1px solid #ccdeeb}#printPreview{padding:18px 0}#printPreview .certificate{font-size:16px}#printPreview p,#printArea p{white-space:pre-wrap}.source-image img{height:auto} .options .option{width:100%}

.lesson-investigation .lesson-grid{display:block}.lesson-investigation .compare{max-width:900px;margin-inline:auto}.lesson-investigation section.evidence-card{margin-block:1rem;padding:1rem}.lesson-investigation .feedback:empty{display:none}

#printPreview{min-width:0;overflow-wrap:anywhere}#printDialog .dialog-bar>*{min-width:0}#printPreview .certificate h1{font-size:clamp(1.45rem,5vw,2.2rem)}@media(max-width:560px){#printDialog{padding:16px}#printDialog .dialog-bar{flex-wrap:wrap}#printPreview .certificate{padding:16px}#printDialog button{max-width:100%;white-space:normal}}


/* Shared resources remain inside the iframe content in embedded mode. */
.school-resources{display:flex;flex-wrap:wrap;margin:20px 0;gap:12px}.school-resources .safety-guide-link{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 18px;border:1px solid #07549a;border-radius:10px;background:#fff;color:#07549a;font-weight:700;line-height:1.5;text-align:center;text-decoration:underline;text-underline-offset:.2em}.school-resources .safety-guide-link:hover{background:#eaf3fb}@media(max-width:560px){.school-resources .safety-guide-link{width:100%}}

.school-resources{align-items:stretch}.school-resources #teacher{font-weight:700;border-color:#07549a;color:#07549a}.embedded .program-head>h1{font-size:clamp(1.7rem,4vw,2.5rem)}.embedded .program-head>.eyebrow{font-size:.8rem;letter-spacing:.08em;margin:0 0 8px}.embedded main{padding-top:22px}@media(max-width:560px){.school-resources>*{width:100%}.school-resources{gap:10px;margin:18px 0}.embedded .program-head>h1{margin:10px 0 14px}}

/* Keep all three documents available at the end of standalone and embedded activities. */
.school-footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin:16px auto 0;max-width:1100px}.school-footer-links a{display:flex;align-items:center;justify-content:center;min-height:48px;padding:12px 16px;border:1px solid #07549a;border-radius:10px;font-weight:700;line-height:1.5}.school-footer-links a:hover{background:#eaf3fb}@media(max-width:560px){.school-footer-links a{width:100%}}

/* Reviewed learning visuals: preserve diagrams and photograph context. */
.learning-visuals{margin:26px 0}.visual-single{max-width:1050px;margin-inline:auto}.visual-single .source-image img{max-height:none}.visual-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.visual-pair .source-image img{height:auto;max-height:390px;object-fit:contain}.full-image-link{display:inline-block;margin:4px 0 12px;font-size:15px}.additional-visual{padding:16px;border:1px solid #cbdbe8;border-radius:10px;margin:20px 0}.additional-visual>summary{cursor:pointer;font-weight:700;min-height:44px}.lesson-visual-wide .lesson-grid{grid-template-columns:1fr}.lesson-visual-wide .lesson-grid>aside:empty{display:none}.teacher-visuals img{max-height:400px!important}.teacher-visuals details{font-size:14px}.source-image details p{overflow-wrap:anywhere}.lesson-grid>*{min-width:0}
@media(max-width:600px){.visual-pair{grid-template-columns:1fr}.learning-visuals{margin:20px 0}.full-image-link{min-height:44px;padding:8px 0}}
@media print{.teacher-visuals{break-inside:avoid}.teacher-visuals .source-image img{max-height:95mm!important;width:100%;object-fit:contain}.teacher-visuals .visual-pair{grid-template-columns:1fr 1fr}.teacher-visuals details{display:block}.teacher-visuals summary,.teacher-visuals .full-image-link{display:none}.teacher-visuals a{overflow-wrap:anywhere}.teacher-visuals{font-size:10pt}}