/* Lisanslı font dosyaları dağıtıma verilmemiştir. Yerel sistem yedeği
   kullanılır; bulunmayan WOFF2 dosyaları için ağ/404 isteği üretilmez. */

body{font-synthesis:none;font-weight:400}
.brand{width:310px;height:310px;top:-130px;background:rgb(244 127 80 / 90%);z-index:2;pointer-events:none}
.brand img{top:154px;z-index:3}
.hero-mark{z-index:1}
.subject,.grade{z-index:4}
.masthead:after{z-index:3}
.subject strong{font-weight:900}
.subject span{font-weight:700}
.grade{font-weight:500;line-height:1.2;bottom:15px}
.squares{display:inline-flex;align-items:center;gap:5px;font-size:inherit;line-height:1;letter-spacing:normal;flex-shrink:0}
.squares i{display:block;width:12px;height:12px;background:var(--rust)}
.grade .squares{display:flex;justify-content:flex-end;margin-top:5px;gap:4px}
.grade .squares i{width:11px;height:11px}
.course-title{font-weight:800}
#sections button{font-weight:500}
.section-title{font-size:20px;font-weight:500;padding:5px 10px;line-height:1.35;margin:0 0 30px}
.section-title:after{display:none}
.section-dots{position:absolute;display:flex;gap:4px;left:10px;bottom:-5px}
.section-dots i{width:8px;height:8px;border-radius:50%;background:#595955}
.section-dots i:first-child{background:var(--orange)}
.section-title[data-section="0"] .section-dots i:first-child{background:#595955}
.source-subtitle{font-size:18px;font-weight:700;margin:0 0 20px}
.question{font-weight:500}
.intro-content,.intro-content.lead{max-width:none;padding:5px 0 0;font-size:18px;line-height:1.75}
.intro-content p{margin-bottom:18px}
.intro-note{margin:24px 0 0}
.start-action{display:flex;justify-content:center;margin:27px 0 9px}
.start-button{display:inline-flex;align-items:center;justify-content:center;gap:38px;min-width:260px;padding:15px 26px;background:var(--rust);font-size:19px;font-weight:700;border:1px solid var(--rust);border-bottom:4px solid #702417;border-radius:5px}
.start-button span{font-size:25px;line-height:1}

/* Dört etkinlik birbiriyle ilişkili bir çalışma akışı olarak görünür. */
.activity-flow{margin:0 0 27px}
.activity-flow ol{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:0;padding:0}
.activity-flow li{min-width:0;position:relative}
.activity-flow li+li:before{content:'';position:absolute;height:1px;width:12px;background:#ceab98;left:-12px;top:28px}
.activity-flow button{display:flex;align-items:flex-start;gap:11px;width:100%;height:100%;border:1px solid #dfcbbf;border-radius:3px;background:#fff;color:#50463f;text-align:left;padding:14px 12px;font-weight:400}
.flow-number{display:flex;justify-content:center;align-items:center;flex-shrink:0;border:1px solid #b47b5b;border-radius:50%;width:29px;height:29px;color:var(--rust);font-weight:500;line-height:1}
.flow-text{display:flex;flex-direction:column;min-width:0;gap:4px}
.flow-text small{font-size:10px;letter-spacing:.06em;margin:0;color:#806454;font-weight:500}
.flow-text strong{font-size:15px;line-height:1.3;font-weight:700}
.flow-text>span{font-size:12px;line-height:1.4;color:#76695e}
.activity-flow button[aria-current]{background:var(--peach);border-color:#b95e3b;border-bottom-width:3px}
.activity-flow button[aria-current] .flow-number{color:white;background:var(--rust);border-color:var(--rust)}
.question-navigation,.reading-navigation{display:flex;gap:9px;flex-wrap:wrap;margin:0 0 26px}
.question-navigation button,.reading-navigation button{background:white;border:1px solid #cfb6a5;color:var(--rust);border-radius:3px;font-size:15px;padding:8px 20px;font-weight:500}
.question-navigation button[aria-current],.reading-navigation button[aria-current]{background:var(--peach);border-color:var(--rust)}
.reading-navigation button{padding:6px 17px;font-size:14px}

/* Keşif görsellerinin oranı 579:351. Tam genişlik, kırpmasız yerleşim. */
.discovery-cards .card{display:flex;flex-direction:column;align-items:stretch;background:var(--gray);border:1px solid #e0d5ce;border-top:0}
.discovery-cards .card img{display:block;width:100%;height:auto;aspect-ratio:579 / 351;object-fit:contain;background:transparent}
.discovery-cards .card .card-text{display:flex;flex-direction:column;flex:1;padding:17px 18px}
.discovery-cards .card strong{color:#ad4628;font-size:17px;font-weight:700}
.discovery-cards .card .open-label{margin-top:auto;padding-top:15px;font-weight:500}
.library-cards .card{min-height:133px;border:1px dotted var(--accent);border-top:4px solid var(--accent);box-shadow:none}
.library-cards .card .card-text{display:flex;flex-direction:column;justify-content:space-between;height:100%;padding:20px}
.library-cards .card strong{font-size:17px;font-weight:700}
.library-cards .open-label{margin-top:15px}

/* PDF'deki ortak krem zemin footer boyunca devam eder. */
.page{padding-bottom:0}
.footer-area{background:var(--cream);margin:0 -38px;border-top:1px solid #d5c6b8;padding:0 38px 17px}
footer{border:0;padding:24px 0 19px}
.footer-brand{font-size:13px;font-weight:300;gap:10px;line-height:1.3}
.footer-brand .squares{gap:5px}
.footer-brand .squares i{width:12px;height:12px}
.scene-nav{gap:17px;min-height:42px}
.scene-nav span{font-weight:500;font-size:14px}
.scene-nav button{font-weight:500}



/* Popup: PDF bilgi kutusu, özgün görsel ve açıklama aynı kompozisyonda. */
dialog{max-height:90vh;max-width:960px;border:1px solid #ab9b8c;border-radius:4px;box-shadow:0 20px 80px #20150d30}
.modal-head{align-items:flex-start;gap:20px;padding:22px 26px 18px}
.modal-head h2{font-size:20px;line-height:1.35;font-weight:700}
.modal-head button{font-size:13px;padding:5px 12px;background:#fff;color:var(--rust);flex-shrink:0;border:1px solid #bd9a85;border-radius:3px;font-weight:500}
#modal-body{padding:0 26px 26px;max-height:calc(90vh - 100px);overflow:auto}
dialog.discovery-dialog{background:white;max-width:870px}
.discovery-dialog .modal-head{background:white;border:0}
.discovery-dialog .modal-head h2{color:#af492c}
.discovery-detail{display:grid;grid-template-columns:38% 1fr;gap:25px;align-items:center;padding-top:3px}
figure{margin:0}
.discovery-detail figure img{display:block;width:100%;height:auto;border:1px solid var(--orange)}
.discovery-explanation{background:var(--gray);padding:25px 23px;line-height:1.65;position:relative;font-size:17px}
.discovery-explanation p:last-child{margin:0}
.discovery-explanation.quote:before{position:absolute;left:-12px;top:-9px;width:25px;height:22px;background:var(--orange)}
dialog.library-dialog{background:var(--tint);border:1px dotted var(--accent)}
.library-dialog .modal-head{background:var(--tint);border:0}
.library-dialog .modal-head h2{color:var(--ink)}
.pdf-library-page{font-size:16px;line-height:1.55}
.pdf-library-page h3{font-size:17px;font-weight:700;line-height:1.35;margin:18px 0 7px}
.pdf-library-page h3:first-child{margin-top:0}
.pdf-library-page p{margin:0 0 12px}
.pdf-quote-row{display:grid;grid-template-columns:minmax(140px,26%) 1fr;align-items:center;gap:28px;margin:21px 0}
.pdf-quote-row figure img{display:block;width:100%;height:auto;max-height:310px;object-fit:contain}
.pdf-information{background:white;position:relative;padding:17px 19px;border-radius:6px 6px 0 0;font-size:15px;line-height:1.55}
.pdf-information.quote:before{position:absolute;left:-15px;top:-10px;width:25px;height:22px;background:var(--accent)}
.pdf-information p{margin:0 0 10px}
.pdf-information p:last-child{margin:0}
.pdf-extra-figure{display:flex;justify-content:center;margin-top:20px;gap:20px}
.pdf-extra-figure img{max-height:230px;width:auto;max-width:100%;object-fit:contain}
.hooke-top{display:grid;grid-template-columns:23% 24% 1fr;align-items:start;gap:21px}
.hooke-portrait img{width:100%;height:auto;display:block}
.hooke-note{margin-top:17px}
.hooke-note .pdf-information{font-size:14px;padding:15px}
.hooke-story h3{margin-top:0}
.hooke-story h3:not(:first-child){margin-top:15px}
.hooke-bottom{display:grid;grid-template-columns:1fr 31%;gap:24px;align-items:center;margin-top:21px}
.hooke-bottom figure img{width:100%;height:auto;display:block}
.pcr-quote-row{grid-template-columns:33% 1fr;align-items:start}
.pcr-visuals{display:flex;gap:13px;align-items:flex-end;margin-top:18px;flex-wrap:wrap}
.pcr-visuals>.source-image{max-width:68%;height:auto;max-height:180px;object-fit:contain}
.qr-block{display:flex;align-items:center;gap:7px;font-size:11px;line-height:1.35}
.qr-block img{width:68px;height:68px;display:block}

/* Dallanmış ağaç: PDF'deki yedi kutu ve sekiz çıkış aynı düzlemde. */
.tree-scroll{margin:16px 0 8px}
.tree-board{position:relative;min-width:760px;height:560px;width:100%;font-size:14px;line-height:1.4}
.tree-connections{position:absolute;inset:0;width:100%;height:560px;overflow:visible}
.tree-connections path{fill:none;stroke:var(--orange);stroke-width:1.25;vector-effect:non-scaling-stroke}
.tree-connections marker path{fill:var(--orange);stroke:none}
.tree-connections .traced{stroke:var(--rust);stroke-width:2.6}
.branch-label circle{fill:#fff;stroke:#87776c;stroke-width:.8}
.branch-label text{fill:#302924;font-size:13px;text-anchor:middle;font-weight:400}
.tree-board .tree-node{position:absolute;display:flex;align-items:center;justify-content:center;text-align:center;border-radius:6px;background:var(--gray);margin:0;padding:13px 14px;min-height:0;border:1px solid transparent}
.tree-board .traced-node{border-color:#be8d72;background:#f1e8e1}
.tree-board .node-0{left:36%;width:28%;top:0;height:84px}
.tree-board .node-1{left:12%;width:26%;top:140px;height:105px}
.tree-board .node-2{left:62%;width:26%;top:140px;height:105px}
.tree-board .node-3,.tree-board .node-4,.tree-board .node-5,.tree-board .node-6{width:22%;top:292px;height:160px}
.tree-board .node-3{left:1.5%}.tree-board .node-4{left:26.5%}.tree-board .node-5{left:51.5%}.tree-board .node-6{left:76.5%}
.tree-exits{position:absolute;top:510px;left:0;width:100%;display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:6px}
.tree-exits .exit{background:#fbd5c0;border:1px solid transparent;border-radius:5px;padding:9px 2px;color:#56382a;font-size:13px;font-weight:500;line-height:1.2;min-height:38px}
.tree-exits .exit[aria-pressed="true"]{background:var(--rust);color:#fff;border-color:var(--rust);outline:2px solid var(--rust);outline-offset:2px}
.tree-action{display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--cream);padding:15px 18px;margin:12px 0 0;border:1px solid #e5d9cd}
.tree-action span{font-size:14px;color:#695347}
.tree-action button{font-size:14px;white-space:nowrap}
.exit-feedback{border:1px solid #e5b396;margin-top:20px;background:#fff8f2}
.exit-feedback-heading{display:flex;align-items:center;gap:20px;padding:13px 20px;background:var(--peach);font-size:15px}
.exit-feedback-heading strong{font-weight:700;color:var(--rust)}
.pdf-tree-quote{background:#ffddc8;border:1px solid var(--orange);border-radius:5px;padding:22px 25px;margin:24px 22px;font-size:17px;line-height:1.6}
.pdf-tree-quote.quote:before{position:absolute;top:-10px;left:-12px;background:var(--orange)}
.pdf-tree-quote p:last-child{margin:0}
.path-details{padding:0 22px 20px;font-size:15px}
.path-details ol{padding-left:23px;margin:18px 0}
.path-details li{margin-bottom:14px}
.path-choice{font-size:13px;color:#6d5547;margin-top:5px}

@media(max-width:1000px){
 .activity-flow ol{gap:8px}
 .activity-flow button{padding:12px 9px;gap:8px}
 .flow-number{width:24px;height:24px;font-size:14px}
 .flow-text strong{font-size:14px}
 .flow-text>span{font-size:11px}
 .footer-brand{font-size:12px}
 .scene-nav{gap:10px}
 .hooke-top{gap:16px}
}
@media(max-width:850px){
 .footer-area{margin:0 -22px;padding:0 22px 16px}
 footer{gap:18px}
 .scene-nav{display:grid;grid-template-columns:1fr auto 1fr}
 #prev{justify-self:start}#next{justify-self:end}#counter{grid-column:2;grid-row:1}
 .activity-flow ol{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
 .activity-flow li+li:before{display:none}
 .flow-text strong{font-size:15px}
 .flow-text>span{font-size:12px}
 .hooke-top{grid-template-columns:1fr 1fr}
 .hooke-story{grid-column:1 / -1}
 .hooke-portrait img{max-height:240px;object-fit:contain}
}
@media(max-width:560px){
 .brand{width:250px;height:250px;left:-80px;top:-100px}
 .brand img{top:119px}
 .grade{font-size:16px;bottom:10px}
 .grade .squares{gap:3px;margin-top:4px}
 .grade .squares i{width:9px;height:9px}
 .section-title{font-size:17px;margin-bottom:28px}
 .section-dots{gap:3px;bottom:-5px}
 .section-dots i{width:7px;height:7px}
 .intro-content.lead{font-size:17px}
 .start-button{min-width:245px;padding:13px 24px;font-size:18px}
 .footer-area{margin:0 -15px;padding:0 15px 15px}
 .footer-brand{font-size:11px;gap:8px}
 .footer-brand .squares{gap:4px}
 .footer-brand .squares i{width:10px;height:10px}
 .flow-text strong{font-size:13px}
 .flow-text>span{font-size:11px}
 .flow-text small{font-size:9px}
 .activity-flow button{gap:7px;padding:11px 8px}
 .flow-number{width:22px;height:22px;font-size:13px}
 .question-navigation{gap:6px}
 .question-navigation button{flex:1;padding:8px 5px;font-size:13px;white-space:nowrap}
 .discovery-cards .card strong{font-size:15px}
 .discovery-cards .card .card-text{padding:13px 12px}
 .discovery-cards .card .open-label{font-size:12px;padding-top:12px}
 .library-cards{grid-template-columns:1fr;gap:12px}
 .library-cards .card{min-height:105px}
 .library-cards .card .card-text{padding:17px}
 .library-cards .card strong{font-size:16px}
 .library-cards .open-label{font-size:13px}
 .modal-head{flex-direction:row;padding:18px 18px 15px;gap:12px}
 .modal-head h2{font-size:17px}
 .modal-head button{font-size:12px;padding:5px 9px}
 #modal-body{padding:0 18px 20px;max-height:calc(90vh - 125px)}
 .discovery-detail{grid-template-columns:1fr;gap:23px;padding-top:0}
 .discovery-detail figure{max-width:330px;justify-self:center}
 .discovery-explanation{padding:20px;font-size:16px}
 .pdf-library-page{font-size:15px}
 .pdf-library-page h3{font-size:16px}
 .pdf-quote-row,.pcr-quote-row{grid-template-columns:1fr;gap:24px}
 .pdf-quote-row>figure{justify-self:center;max-width:220px}
 .pdf-quote-row figure img{max-height:230px}
 .pdf-information{font-size:14px}
 .hooke-top{gap:16px;grid-template-columns:42% 1fr}
 .hooke-note .pdf-information{padding:13px;font-size:13px}
 .hooke-portrait img{max-height:220px}
 .hooke-bottom{grid-template-columns:1fr}
 .hooke-bottom figure{justify-self:center;max-width:230px}
 .tree-action{align-items:stretch;flex-direction:column;gap:12px}
 .tree-action button{white-space:normal}
 .exit-feedback-heading{gap:8px;flex-direction:column;align-items:flex-start}
 .pdf-tree-quote{margin:22px 17px;padding:19px;font-size:16px}
 .path-details{padding:0 17px 17px}
 .scene-nav{gap:8px}
 .scene-nav button{font-size:13px;padding:9px 13px}
 .scene-nav span{font-size:13px}
}