:root{
  --navy:#17324d; --navy-2:#244760; --petrol:#1f6f78; --teal:#2c9c95; --coral:#df7359;
  --sand:#f4efe6; --mist:#eef4f5; --paper:#ffffff; --ink:#24323e; --muted:#687986; --line:#d9e3e6;
  --people:#80649a; --earth:#b06a43; --success:#38785b; --shadow:0 18px 45px rgba(25,56,73,.10);
  --radius:22px; --max:1180px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f7f9fa;color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.58}a{color:inherit;text-decoration:none}button,input{font:inherit}.site-header{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:32px;justify-content:space-between;padding:14px max(24px,calc((100vw - var(--max))/2));background:rgba(247,249,250,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(23,50,77,.08)}.brand{display:flex;align-items:center;gap:11px;min-width:max-content}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:14px;background:var(--navy);color:white;font-size:24px;font-weight:700}.brand strong{display:block;font-size:14px;letter-spacing:.01em}.brand small{display:block;font-size:12px;color:var(--muted);margin-top:-2px}.top-nav{display:flex;align-items:center;gap:8px}.top-nav a{padding:9px 12px;border-radius:12px;font-size:14px;color:#536572}.top-nav a:hover,.top-nav a.active{background:white;color:var(--navy);box-shadow:0 4px 18px rgba(31,64,82,.07)}.menu-toggle{display:none;background:white;border:1px solid var(--line);border-radius:12px;padding:8px 11px}.hero{position:relative;overflow:hidden;max-width:var(--max);margin:26px auto 0;min-height:485px;border-radius:34px;padding:64px;display:grid;grid-template-columns:1.2fr .8fr;align-items:center;background:linear-gradient(135deg,var(--navy) 0%,#1f5168 62%,#2a7580 100%);color:white;box-shadow:var(--shadow)}.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.12),transparent 28%),repeating-radial-gradient(ellipse at 83% 50%,transparent 0 24px,rgba(255,255,255,.045) 25px 26px);pointer-events:none}.hero-copy{position:relative;z-index:2;max-width:700px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.16em;color:var(--petrol)}.hero .eyebrow{color:#a8e1dc}.hero h1{font-size:clamp(42px,5.3vw,68px);line-height:1.04;margin:12px 0 18px;letter-spacing:-.045em}.hero p{font-size:18px;max-width:640px;color:#e5eef1;margin:0 0 28px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:14px;font-weight:750;font-size:14px}.btn.primary{background:white;color:var(--navy)}.btn.secondary{border:1px solid rgba(255,255,255,.28);color:white;background:rgba(255,255,255,.08)}.hero-pills{display:flex;gap:8px;flex-wrap:wrap;margin-top:30px}.hero-pills span{font-size:12px;padding:7px 10px;border:1px solid rgba(255,255,255,.20);border-radius:999px;color:#e9f1f3}.hero-visual{position:relative;height:340px}.globe-grid{position:absolute;right:4%;top:2%;width:290px;aspect-ratio:1;border-radius:50%;border:1px solid rgba(255,255,255,.23);background:repeating-radial-gradient(circle at center,transparent 0 28px,rgba(255,255,255,.09) 29px 30px),repeating-linear-gradient(90deg,transparent 0 34px,rgba(255,255,255,.075) 35px 36px);transform:rotate(-8deg)}.orbit{position:absolute;border:1px solid rgba(255,255,255,.18);border-radius:50%}.orbit-a{right:-10px;top:80px;width:360px;height:170px;transform:rotate(22deg)}.orbit-b{right:48px;top:32px;width:220px;height:270px;transform:rotate(-18deg)}.terrain-card{position:absolute;display:flex;gap:8px;align-items:center;padding:12px 14px;border-radius:16px;background:rgba(255,255,255,.93);color:var(--navy);box-shadow:0 18px 28px rgba(6,29,42,.2);font-size:13px}.terrain-card span{color:var(--petrol);font-size:18px}.tc-1{left:2%;top:22%}.tc-2{right:-2%;bottom:18%}.tc-3{left:15%;bottom:5%}.section-shell{max-width:var(--max);margin:68px auto;padding:0 8px}.intro-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:20px}.intro-strip article{display:flex;gap:14px;align-items:center;padding:18px 20px;border:1px solid var(--line);border-radius:18px;background:white}.intro-strip article>span{font-weight:850;color:var(--teal);font-size:14px}.intro-strip b,.intro-strip small{display:block}.intro-strip small{color:var(--muted);margin-top:2px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:24px}.section-heading.compact{align-items:center}.section-heading h2{font-size:32px;letter-spacing:-.03em;margin:4px 0 0;color:var(--navy)}.section-heading p{max-width:430px;color:var(--muted);margin:0}.field-grid{display:grid;grid-template-columns:1fr 1.12fr 1fr;gap:18px}.field-card{position:relative;overflow:hidden;min-height:290px;padding:28px;border-radius:26px;color:white;box-shadow:var(--shadow);cursor:pointer;transition:transform .2s ease}.field-card:hover{transform:translateY(-4px)}.field-card.maps{background:linear-gradient(145deg,#1d6a74,#2a8d90)}.field-card.earth{background:linear-gradient(145deg,#754b38,#b46d45)}.field-card.people{background:linear-gradient(145deg,#5a4f76,#886da1)}.field-card:after{content:"";position:absolute;inset:0;background:repeating-radial-gradient(ellipse at 86% 85%,transparent 0 22px,rgba(255,255,255,.055) 23px 24px)}.field-number{font-size:12px;letter-spacing:.17em;opacity:.8}.field-icon{display:grid;place-items:center;width:56px;height:56px;margin:48px 0 16px;border-radius:18px;background:rgba(255,255,255,.14);font-size:28px}.field-card h3{font-size:23px;line-height:1.2;margin:0 0 8px}.field-card p{margin:0;color:rgba(255,255,255,.82)}.field-card .open-field{position:absolute;z-index:2;right:24px;bottom:22px;border:1px solid rgba(255,255,255,.22);padding:8px 11px;border-radius:12px;font-size:12px}.chapter-browser{margin-top:36px;padding:30px;border-radius:28px;background:white;border:1px solid var(--line);box-shadow:var(--shadow)}.chapter-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.chapter-card{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px;border:1px solid var(--line);border-radius:15px;background:#fbfcfc;transition:.2s}.chapter-card:hover{border-color:#a7c9cd;background:white;transform:translateY(-1px)}.chapter-card span{font-weight:850;color:var(--petrol);min-width:42px}.chapter-card b{font-size:14px;flex:1}.chapter-card i{font-style:normal;color:#81909a}.text-button{border:0;background:transparent;color:var(--muted);cursor:pointer}.support-band{display:grid;grid-template-columns:.9fr 1.5fr;gap:34px;align-items:center;padding:38px;border-radius:30px;background:var(--navy);color:white}.support-band .eyebrow{color:#99dbd6}.support-band h2{font-size:34px;line-height:1.18;margin:8px 0 0}.support-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.support-cards article{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.12);padding:18px;border-radius:18px}.support-cards b{display:block;margin:8px 0 5px;font-size:14px}.support-cards p{font-size:12px;color:#dbe7eb;margin:0}.support-icon{font-size:22px;color:#a9e0d9}.site-footer{max-width:var(--max);margin:60px auto 26px;padding:22px 10px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px}.site-footer strong,.site-footer span{display:block}.site-footer strong{color:var(--navy);font-size:13px}
/* lesson */
.lesson-shell{max-width:var(--max);margin:0 auto;padding:18px 8px 50px}.breadcrumb{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:12px;margin:10px 0 20px}.breadcrumb b{color:var(--navy)}.lesson-hero{position:relative;overflow:hidden;display:grid;grid-template-columns:1.3fr .7fr;align-items:center;min-height:320px;padding:46px 48px;border-radius:30px;background:linear-gradient(135deg,#e9f4f4,#f8fbfb 55%,#eef6f0);border:1px solid #d5e6e8}.lesson-hero:after{content:"";position:absolute;inset:0;background:repeating-radial-gradient(ellipse at 88% 78%,transparent 0 20px,rgba(31,111,120,.055) 21px 22px);pointer-events:none}.chapter-kicker{display:inline-flex;padding:7px 10px;border-radius:999px;background:white;color:var(--petrol);font-size:12px;font-weight:800;letter-spacing:.08em}.lesson-hero h1{font-size:46px;line-height:1.05;letter-spacing:-.04em;color:var(--navy);margin:14px 0}.lesson-hero p{max-width:700px;color:#526874;font-size:17px}.lesson-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}.lesson-meta span{font-size:11px;padding:6px 9px;border-radius:999px;background:rgba(255,255,255,.78);color:#57707b;border:1px solid #d8e6e8}.lesson-hero-art{display:grid;place-items:center;position:relative;z-index:2}.mini-map{position:relative;width:270px;height:220px;border-radius:24px;background:#f2eadb;border:8px solid white;box-shadow:0 22px 45px rgba(37,80,90,.15);overflow:hidden}.mini-map:before{content:"";position:absolute;inset:0;background:linear-gradient(35deg,transparent 45%,rgba(101,141,96,.22) 46% 55%,transparent 56%),linear-gradient(-20deg,transparent 60%,rgba(101,141,96,.18) 61% 72%,transparent 73%)}.mini-map b{position:absolute;right:16px;top:13px;color:var(--navy)}.river{position:absolute;left:110px;top:-20px;width:20px;height:280px;border-left:9px solid #69b3c5;border-radius:50%;transform:rotate(24deg)}.road{position:absolute;height:4px;background:#d39b65;transform-origin:left center}.r1{width:330px;left:-20px;top:78px;transform:rotate(15deg)}.r2{width:270px;left:10px;top:170px;transform:rotate(-15deg)}.pin{position:absolute;width:13px;height:13px;border-radius:50% 50% 50% 0;background:var(--coral);transform:rotate(-45deg);box-shadow:0 3px 7px rgba(0,0,0,.12)}.p1{left:55px;top:52px}.p2{left:185px;top:112px}.p3{left:90px;top:158px}.lesson-jump{position:sticky;top:69px;z-index:35;display:flex;gap:6px;overflow:auto;margin:14px 0 34px;padding:8px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.94);backdrop-filter:blur(10px)}.lesson-jump a{white-space:nowrap;padding:8px 11px;border-radius:11px;font-size:12px;color:#5f7480}.lesson-jump a:hover{background:var(--mist);color:var(--petrol)}.lesson-section{margin:34px 0}.lesson-section-header{display:flex;align-items:center;gap:12px;margin-bottom:17px}.section-index{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;background:var(--navy);color:white;font-size:12px;font-weight:800}.lesson-section h2{margin:0;font-size:29px;color:var(--navy);letter-spacing:-.025em}.goal-grid,.theory-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.goal-card,.theory-card,.activity-card,.support-panel,.oral-card,.quiz-card{background:white;border:1px solid var(--line);border-radius:20px;padding:20px}.goal-card{display:flex;gap:12px;align-items:flex-start}.goal-card i{font-style:normal;display:grid;place-items:center;min-width:28px;height:28px;border-radius:10px;background:#e8f4f1;color:var(--success);font-weight:850}.theory-card{position:relative;overflow:hidden}.theory-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--mist);color:var(--petrol);font-size:19px}.theory-card h3{margin:13px 0 7px;color:var(--navy);font-size:17px}.theory-card p{margin:0;color:#607480;font-size:14px}.keyword-row{display:flex;gap:7px;flex-wrap:wrap;margin-top:14px}.keyword-row span{padding:6px 9px;border-radius:999px;background:#f0f5f5;color:#57717a;font-size:11px}.observe-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:14px}.map-identity{position:relative;min-height:340px;background:#eef4e9;border-radius:22px;overflow:hidden;border:1px solid #dce8d6}.map-identity .sea{position:absolute;right:-30px;top:-40px;width:46%;height:120%;background:#d7edf0;border-radius:50% 0 0 50%}.map-identity .park{position:absolute;left:52px;top:88px;width:120px;height:110px;background:#c7ddbd;border-radius:47% 53% 38% 62% / 52% 46% 54% 48%}.map-identity .roadline{position:absolute;left:-40px;top:220px;width:420px;height:8px;background:#c89765;transform:rotate(-13deg)}.map-identity .town{position:absolute;display:grid;place-items:center;width:18px;height:18px;border-radius:5px;background:#e18869;color:white;font-size:8px}.map-identity .t1{left:75px;top:45px}.map-identity .t2{left:205px;top:175px}.map-identity .t3{left:270px;top:90px}.map-tag{position:absolute;background:white;border:1px solid #cddadc;border-radius:10px;padding:7px 9px;font-size:11px;font-weight:750;box-shadow:0 6px 14px rgba(28,65,78,.08)}.tag-title{left:16px;top:14px}.tag-legend{left:16px;bottom:16px}.tag-scale{right:18px;bottom:16px}.tag-north{right:18px;top:16px}.observe-copy h3{margin-top:0;color:var(--navy)}.observe-copy p{color:var(--muted)}.observe-copy .mini-task{padding:14px;border-radius:15px;background:#f4f7f7;margin-top:12px;font-size:13px}.activity-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.activity-card h3,.quiz-card h3{margin:0 0 8px;color:var(--navy);font-size:17px}.activity-card>p,.quiz-card>p{margin:0 0 14px;color:var(--muted);font-size:13px}.option-list{display:grid;gap:8px}.option{display:flex;gap:10px;align-items:center;padding:10px 11px;border:1px solid var(--line);border-radius:12px;background:#fbfcfc;cursor:pointer;font-size:13px}.option:hover{border-color:#9fc5c8}.option input{accent-color:var(--petrol)}.action-row{display:flex;gap:8px;align-items:center;margin-top:12px}.check-btn,.reset-btn,.reveal-btn{border:0;border-radius:11px;padding:9px 12px;cursor:pointer;font-weight:750;font-size:12px}.check-btn{background:var(--navy);color:white}.reset-btn{background:#eef2f3;color:#627680}.feedback{font-size:12px;font-weight:750}.feedback.good{color:var(--success)}.feedback.bad{color:#a85448}.fill-sentence{display:flex;gap:7px;align-items:center;flex-wrap:wrap;font-size:14px}.fill-sentence select,.fill-sentence input{border:1px solid var(--line);background:white;border-radius:9px;padding:7px 8px;color:var(--navy)}.match-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}.match-grid select{width:100%;border:1px solid var(--line);border-radius:10px;padding:8px;background:white}.compass-dnd{display:grid;grid-template-columns:120px 1fr;gap:18px;align-items:center}.compass{position:relative;width:116px;aspect-ratio:1;border:2px solid #bfd1d3;border-radius:50%;background:radial-gradient(circle,#fff 0 22%,#eff5f5 23% 100%)}.drop{position:absolute;display:grid;place-items:center;width:34px;height:26px;border:1px dashed #91adb2;border-radius:8px;background:white;font-size:11px}.drop.n{left:40px;top:-9px}.drop.s{left:40px;bottom:-9px}.drop.w{left:-12px;top:44px}.drop.e{right:-12px;top:44px}.drag-bank{display:flex;gap:7px;flex-wrap:wrap}.drag-item{padding:7px 9px;background:var(--navy);color:white;border-radius:9px;font-size:11px;cursor:grab;user-select:none}.drag-item.dragging{opacity:.35}.help-box{padding:16px;border-radius:15px;background:#fff8ec;border:1px solid #eddcbc;font-size:13px;color:#6b5a40}.quiz-list{display:grid;gap:10px}.quiz-q{padding:14px;border-radius:15px;background:#f9fbfb;border:1px solid var(--line)}.quiz-q b{display:block;margin-bottom:9px;font-size:13px}.support-layout{display:grid;grid-template-columns:1fr 1fr;gap:14px}.support-panel{background:#fffaf0;border-color:#ecdcb8}.support-panel h3,.oral-card h3{margin-top:0;color:var(--navy)}.support-panel ol{padding-left:20px;margin-bottom:0;color:#665f52;font-size:13px}.oral-list{display:grid;gap:9px}.oral-q{border:1px solid var(--line);border-radius:13px;padding:12px;background:#fbfcfc}.oral-q button{width:100%;text-align:left;border:0;background:transparent;color:var(--navy);font-weight:750;cursor:pointer}.oral-a{display:none;margin:8px 0 0;padding-top:8px;border-top:1px dashed var(--line);font-size:12px;color:var(--muted)}.oral-q.open .oral-a{display:block}.lesson-nav-bottom{display:flex;justify-content:space-between;gap:12px;margin-top:42px;padding-top:22px;border-top:1px solid var(--line)}.nav-chapter{display:flex;align-items:center;gap:10px;padding:13px 15px;border:1px solid var(--line);background:white;border-radius:14px;font-size:12px;max-width:48%}.nav-chapter b{display:block;color:var(--navy)}.nav-chapter span{color:var(--muted)}.placeholder{padding:55px 30px;text-align:center;border:1px dashed #bdcbce;border-radius:24px;background:white}.placeholder h2{color:var(--navy)}.placeholder p{max-width:680px;margin:10px auto;color:var(--muted)}
@media(max-width:900px){.top-nav{display:none}.menu-toggle{display:block}.top-nav.open{position:absolute;display:grid;right:20px;top:62px;padding:10px;background:white;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.hero{grid-template-columns:1fr;padding:40px;min-height:auto}.hero-visual{height:240px;margin-top:20px}.field-grid,.support-band,.observe-grid{grid-template-columns:1fr}.field-card{min-height:230px}.support-cards{grid-template-columns:1fr 1fr 1fr}.lesson-hero{grid-template-columns:1fr;padding:34px}.lesson-hero-art{display:none}.goal-grid,.theory-grid,.activity-grid,.support-layout{grid-template-columns:1fr}.section-shell{padding:0 16px}.lesson-shell{padding-left:16px;padding-right:16px}}
@media(max-width:640px){.site-header{padding:12px 16px}.brand strong{font-size:13px}.hero{margin:14px 12px 0;padding:28px;border-radius:24px}.hero h1{font-size:39px}.hero-visual{display:none}.intro-strip,.chapter-grid,.support-cards{grid-template-columns:1fr}.section-heading{display:block}.section-heading p{margin-top:10px}.field-grid{grid-template-columns:1fr}.support-band{margin-left:12px;margin-right:12px;padding:26px}.lesson-hero h1{font-size:36px}.lesson-jump{top:64px}.compass-dnd{grid-template-columns:1fr}.site-footer{margin-left:16px;margin-right:16px}}

/* v0.2 — enriched theory + first thematic field */
.theory-grid.enriched{grid-template-columns:repeat(2,minmax(0,1fr));align-items:stretch}.theory-grid.enriched .theory-card{padding:22px}.theory-copy{color:#5e737e;font-size:14px;line-height:1.68}.theory-copy p{margin:0 0 10px}.theory-copy p:last-child{margin-bottom:0}.theory-copy b{color:var(--navy)}.section-note{margin:-4px 0 16px;padding:11px 14px;border-left:4px solid var(--petrol);background:#f2f7f7;border-radius:0 12px 12px 0;color:#60737c;font-size:12px}.activity-card.wide{grid-column:1/-1}.activity-hint{display:none}.answer-input{width:100%;max-width:260px;border:1px solid var(--line);border-radius:11px;padding:10px 11px;font-size:14px;color:var(--navy);background:white}.mini-help{margin-top:10px;padding:10px 12px;border-radius:11px;background:#f6f8f8;color:#657781;font-size:12px}.quiz-options{display:flex;flex-wrap:wrap;gap:10px}.quiz-options label{display:inline-flex;gap:6px;align-items:center;padding:8px 10px;border-radius:10px;background:white;border:1px solid var(--line);font-size:12px}.support-panel .help-box ul{padding-left:18px;margin:9px 0 0}.support-panel .help-box li{margin:5px 0}.support-tip{font-size:12px;color:#7b6d56}.oral-q button{display:flex;align-items:center;justify-content:space-between;gap:12px}.oral-q button span{font-size:17px;color:var(--petrol)}.drag-help{font-size:11px;color:#73858e;margin:9px 0 0}.drag-item.selected{outline:3px solid rgba(31,111,120,.2);background:var(--petrol)}

.concept-table{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin:15px 0}.concept-table span{display:flex;flex-direction:column;gap:3px;padding:11px;border:1px solid var(--line);border-radius:12px;background:white;color:#61747d;font-size:11px}.concept-table b{color:var(--navy);font-size:12px}.formula-card{display:flex;gap:10px;align-items:center;justify-content:center;flex-wrap:wrap;margin:14px 0;padding:15px;border-radius:15px;background:#eef6f3;border:1px solid #d9e9e3;color:var(--navy);font-size:13px}.formula-card span{color:var(--coral);font-size:18px;font-weight:800}

.scale-visual{display:grid;grid-template-columns:1fr 1fr;gap:12px;min-height:340px}.zoom-map{position:relative;overflow:hidden;border-radius:20px;border:1px solid #dbe5e2;background:#eaf1df}.zoom-map:after{content:"";position:absolute;inset:0;background:repeating-radial-gradient(circle at 55% 50%,transparent 0 29px,rgba(72,112,76,.07) 30px 31px)}.zoom-map b{position:absolute;right:12px;bottom:12px;z-index:3;background:white;border-radius:9px;padding:6px 8px;color:var(--navy);font-size:11px}.zoom-title{position:absolute;left:12px;top:12px;z-index:3;background:white;border-radius:9px;padding:6px 8px;color:var(--petrol);font-weight:800;font-size:11px}.zoom-map .road-z{position:absolute;left:-20%;top:55%;width:150%;height:7px;background:#d89c66;transform:rotate(-13deg);z-index:2}.zoom-a .block{position:absolute;width:44px;height:38px;border-radius:7px;background:#d8c2a4;z-index:2}.zoom-a .b1{left:25%;top:25%}.zoom-a .b2{right:20%;top:38%}.zoom-b .region-shape{position:absolute;inset:18% 12% 20% 18%;background:#c6d9b7;border-radius:43% 57% 46% 54% / 57% 39% 61% 43%;z-index:1}

.coord-visual{display:grid;grid-template-columns:1.1fr .9fr;gap:12px;min-height:340px}.coord-globe{position:relative;min-height:340px;border-radius:22px;background:radial-gradient(circle at 38% 34%,#f8fbfb 0 7%,#d7edef 8% 44%,#b8dcdf 45% 100%);overflow:hidden;border:1px solid #cfe2e4}.coord-globe:before{content:"";position:absolute;left:14%;top:14%;width:72%;height:72%;border-radius:50%;background:rgba(185,205,154,.42);clip-path:polygon(12% 31%,28% 14%,45% 19%,58% 36%,76% 31%,88% 50%,73% 63%,54% 58%,42% 78%,25% 68%,19% 51%)}.coord-globe .equator,.coord-globe .lat{position:absolute;left:5%;right:5%;height:2px;background:rgba(197,92,76,.65)}.coord-globe .equator{top:50%;background:var(--coral);height:3px}.coord-globe .l1{top:33%}.coord-globe .l2{top:67%}.coord-globe .prime,.coord-globe .lon{position:absolute;top:5%;bottom:5%;width:2px;background:rgba(32,77,96,.5)}.coord-globe .prime{left:50%;background:var(--navy);width:3px}.coord-globe .o1{left:32%}.coord-globe .o2{left:68%}.coord-point{position:absolute;left:66%;top:31%;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--coral);color:white;font-style:normal;font-weight:850;box-shadow:0 7px 16px rgba(120,70,55,.2)}.eq-label,.pm-label{position:absolute;z-index:3;background:white;padding:5px 7px;border-radius:8px;font-size:9px;color:#536c76}.eq-label{left:9%;top:52%}.pm-label{left:52%;top:8%;writing-mode:vertical-rl}.contour-demo{position:relative;border-radius:22px;background:#f3eee1;border:1px solid #e2dac7;overflow:hidden;min-height:340px}.contour-demo .c{position:absolute;border:3px solid #b89562;border-radius:50%;display:grid;place-items:start center;color:#7d684b;font-size:10px;padding-top:5px}.contour-demo .c1{inset:28px 18px 45px}.contour-demo .c2{inset:75px 42px 82px}.contour-demo .c3{inset:120px 68px 122px}.contour-demo .peak{position:absolute;left:50%;top:49%;transform:translate(-50%,-50%);color:var(--coral)}.contour-demo small{position:absolute;left:12px;right:12px;bottom:12px;padding:8px;border-radius:10px;background:white;color:#746952;text-align:center}

.gis-visual{display:grid;grid-template-columns:1fr;gap:12px;min-height:340px}.gis-stack{display:grid;gap:0;align-content:center;perspective:700px;padding:14px 28px}.gis-layer{position:relative;height:62px;margin-top:-12px;border:1px solid rgba(31,78,96,.18);border-radius:14px;background:rgba(255,255,255,.88);box-shadow:0 13px 25px rgba(34,78,90,.08);transform:rotateX(58deg) rotateZ(-5deg);display:flex;align-items:center;justify-content:space-between;padding:0 18px;color:var(--navy)}.gis-layer span{font-weight:800;font-size:12px}.gis-layer i{font-style:normal;letter-spacing:5px}.l-relief{background:#e5eddc}.l-water{background:#dcedf0}.l-road{background:#f6e8d8}.l-pop{background:#f6dfd8}.sat-box{display:flex;align-items:center;justify-content:center;gap:10px;padding:13px;border-radius:14px;background:#f4f7f7;border:1px solid var(--line);color:#60737c;font-size:11px}.sat-box span{font-size:24px}

.project-flow{display:grid;grid-template-columns:1fr;gap:8px}.project-flow div{display:grid;grid-template-columns:34px 1fr;column-gap:10px;align-items:center;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:white}.project-flow i{grid-row:1/3;display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:var(--navy);color:white;font-style:normal;font-weight:850}.project-flow b{color:var(--navy);font-size:13px}.project-flow span{color:var(--muted);font-size:11px}

.sequence-dnd,.layers-dnd,.axis-dnd{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}.sequence-slots,.layer-slots{display:grid;gap:8px}.seq-drop,.layer-drop{position:relative;min-height:48px;border:1px dashed #91adb2;border-radius:11px;background:#fbfdfd;padding:7px 10px;display:grid;grid-template-columns:70px 1fr;align-items:center}.seq-drop small,.layer-drop small{color:#74868e}.seq-drop b,.layer-drop b{color:var(--navy);font-size:12px}.layer-drop:nth-child(1){background:#edf3e7}.layer-drop:nth-child(2){background:#e7f2f4}.layer-drop:nth-child(3){background:#f7ece0}.layer-drop:nth-child(4){background:#f8e5df}.axis-board{position:relative;min-height:250px;border-radius:18px;background:#f8fbfb;border:1px solid var(--line)}.axis-h,.axis-v{position:absolute;background:#7999a1}.axis-h{left:8%;right:8%;height:2px;top:50%}.axis-v{top:8%;bottom:8%;width:2px;left:50%}.axis-slot{position:absolute;width:126px;min-height:54px;padding:7px;border:1px dashed #91adb2;border-radius:10px;background:white;text-align:center}.axis-slot small{display:block;color:#75858c;font-size:9px}.axis-slot b{display:block;margin-top:4px;color:var(--navy)}.axis-slot.as1{left:50%;top:7px;transform:translateX(-50%)}.axis-slot.as2{left:50%;bottom:7px;transform:translateX(-50%)}.axis-slot.as3{left:7px;top:50%;transform:translateY(-50%)}.axis-slot.as4{right:7px;top:50%;transform:translateY(-50%)}

@media(max-width:900px){.theory-grid.enriched{grid-template-columns:1fr}.scale-visual,.coord-visual{grid-template-columns:1fr}.coord-globe,.contour-demo{min-height:300px}.sequence-dnd,.layers-dnd,.axis-dnd{grid-template-columns:1fr}.activity-card.wide{grid-column:auto}.concept-table{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.concept-table{grid-template-columns:1fr}.scale-visual{grid-template-columns:1fr}.zoom-map{min-height:220px}.coord-visual{grid-template-columns:1fr}.axis-slot{width:106px}.theory-copy{font-size:13px}.activity-grid{grid-template-columns:1fr}}
.section-note.warm{border-left-color:var(--coral);background:#fff6f1;color:#7a655d}


.image-dnd{display:grid;grid-template-columns:minmax(0,1.25fr) .75fr;gap:18px;align-items:start}
.image-stage-wrap{display:grid;gap:8px}
.image-stage{position:relative;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:#f7fafb;box-shadow:0 10px 24px rgba(31,111,120,.08)}
.image-stage img{display:block;width:100%;height:auto}
.image-drop{position:absolute;display:grid;grid-template-columns:20px 1fr;align-items:center;gap:6px;min-height:40px;padding:5px 7px;border:2px dashed #3f8ac6;border-radius:12px;background:rgba(255,255,255,.94);box-shadow:0 8px 18px rgba(31,111,120,.10)}
.image-drop small{display:grid;place-items:center;width:20px;height:20px;border-radius:50%;background:#e8f3fb;color:#22577a;font-weight:800;font-size:11px}
.image-drop b{font-size:12px;color:var(--navy);text-align:left}
.image-activity-caption{margin:0;color:#607480;font-size:12px}
@media(max-width:900px){.image-dnd{grid-template-columns:1fr}.image-drop{min-height:36px}}

.theory-figure{margin:14px 0 4px}.theory-figure img{display:block;width:100%;height:auto;border-radius:14px;border:1px solid var(--line);background:#fff}.theory-figure figcaption{margin-top:7px;font-size:12px;line-height:1.5;color:#71848d}.theory-copy .theory-mini-note{padding:10px 12px;border-radius:12px;background:#f4f7f7;color:#61757f;font-size:12px}

.activity-media{margin:12px 0 14px}.activity-media img{display:block;width:100%;max-height:360px;object-fit:contain;border:1px solid var(--line);border-radius:14px;background:#fff}.activity-media figcaption{margin-top:6px;font-size:11px;line-height:1.45;color:#71848d}

.observe-image-card{margin:0;background:white;border:1px solid var(--line);border-radius:20px;padding:12px;align-self:start}.observe-image-card img{display:block;width:100%;max-height:430px;object-fit:contain;border-radius:14px}.observe-image-card figcaption{font-size:11px;line-height:1.45;color:#71848d;margin-top:8px}

/* External and visual resource cards */
.resource-link-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 15px;border-radius:12px;background:var(--navy);color:#fff;text-decoration:none;font-weight:800;box-shadow:0 7px 18px rgba(28,65,90,.12)}
.resource-link-btn:hover{transform:translateY(-1px);filter:brightness(1.04)}
.external-embed{margin:12px 0;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff}
.external-embed iframe{display:block;width:100%;min-height:520px;border:0;background:#fff}
.image-prompt-card .activity-media img{max-height:none;object-fit:contain}
@media(max-width:800px){.external-embed iframe{min-height:430px}}

/* Embedded lesson videos */
.video-index{background:#5b5fc7;font-size:13px}
.video-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.video-card{overflow:hidden;background:white;border:1px solid var(--line);border-radius:20px;box-shadow:0 10px 25px rgba(38,72,82,.06)}
.video-frame{position:relative;background:#0b1720;aspect-ratio:16/9;overflow:hidden}
.video-frame video{display:block;width:100%;height:100%;object-fit:contain;background:#0b1720}
.video-duration{position:absolute;right:10px;bottom:10px;padding:4px 7px;border-radius:8px;background:rgba(11,23,32,.82);color:white;font-size:11px;font-weight:800;pointer-events:none}
.video-copy{padding:15px 17px 17px}
.video-copy h3{margin:0 0 7px;color:var(--navy);font-size:16px}
.video-copy p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}
.video-copy b{color:var(--petrol)}
@media (max-width:760px){.video-grid{grid-template-columns:1fr}.video-copy{padding:13px 14px 15px}}

/* Home page final publication layout: centered, with creator credit */
body[data-page="home"] main{display:block}
body[data-page="home"] .hero{
  grid-template-columns:1fr;
  justify-items:center;
  text-align:center;
  min-height:auto;
  padding:62px 72px 54px;
}
body[data-page="home"] .hero-copy{
  width:min(100%,920px);
  max-width:920px;
  margin:0 auto;
  text-align:center;
}
body[data-page="home"] .hero h1{max-width:900px;margin-left:auto;margin-right:auto}
body[data-page="home"] .hero p{max-width:790px;margin-left:auto;margin-right:auto}
body[data-page="home"] .hero-actions,
body[data-page="home"] .hero-pills{justify-content:center}
body[data-page="home"] .hero-visual{display:none}
body[data-page="home"] .creator-card{
  width:min(100%,780px);
  margin:34px auto 0;
  padding:18px 24px;
  border-radius:19px;
  background:rgba(255,255,255,.95);
  border:1px solid rgba(255,255,255,.42);
  color:var(--navy);
  box-shadow:0 14px 30px rgba(8,34,48,.16);
  text-align:center;
}
body[data-page="home"] .creator-card strong,
body[data-page="home"] .creator-card b,
body[data-page="home"] .creator-card small{display:block}
body[data-page="home"] .creator-card strong{font-size:14px;letter-spacing:.01em}
body[data-page="home"] .creator-card b{margin-top:5px;color:var(--teal);font-size:15px}
body[data-page="home"] .creator-card small{margin-top:7px;color:#71848d;font-size:12px;line-height:1.5}
body[data-page="home"] .section-heading{align-items:center;justify-content:center;text-align:center;flex-direction:column;gap:7px}
body[data-page="home"] .section-heading p{max-width:650px;margin:0 auto}
body[data-page="home"] .support-band>div:first-child{text-align:center}
body[data-page="home"] .support-band>div:first-child h2{max-width:760px;margin-left:auto;margin-right:auto}
body[data-page="home"] .home-footer{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:34px 72px;
}
body[data-page="home"] .footer-credit{display:grid;gap:5px;justify-items:center;max-width:860px;margin:0 auto}
body[data-page="home"] .footer-credit strong{color:var(--navy);font-size:14px}
body[data-page="home"] .footer-credit span{color:#637985;font-size:13px}
body[data-page="home"] .footer-credit small{color:#78909a;font-size:12px}
body[data-page="home"] .home-footer .back-top{position:absolute;right:28px;top:50%;transform:translateY(-50%)}

@media(max-width:900px){
  body[data-page="home"] .hero{padding:44px 34px 40px}
  body[data-page="home"] .home-footer{padding:30px 52px 52px}
  body[data-page="home"] .home-footer .back-top{position:static;transform:none;margin-top:12px}
  body[data-page="home"] .home-footer{flex-direction:column}
}
@media(max-width:640px){
  body[data-page="home"] .hero{padding:30px 20px}
  body[data-page="home"] .creator-card{padding:16px 15px;margin-top:26px}
  body[data-page="home"] .creator-card strong{font-size:13px}
  body[data-page="home"] .creator-card b{font-size:14px}
  body[data-page="home"] .home-footer{padding:28px 20px 34px}
}


/* Γεωγραφικές συντεταγμένες: διαδραστικός χάρτης πέντε σημείων (1.3). */
.coords-card{min-width:0}
.coords-map-scroll{max-width:100%;overflow-x:auto;border:1px solid #b9d0de;border-radius:15px;background:#fff;box-shadow:0 9px 20px rgba(22,50,80,.05)}
.coords-map-scroll:focus-visible{outline:3px solid #2774b5;outline-offset:3px}
.coords-map{width:100%;min-width:750px;position:relative}
.coords-map img{width:100%;height:auto;display:block}
.coords-pin{position:absolute;transform:translate(-50%,-50%);width:clamp(28px,3.1vw,45px);height:clamp(28px,3.1vw,45px);border:2px solid transparent;border-radius:50%;background:transparent;cursor:pointer;padding:0;z-index:2}
.coords-pin:hover,.coords-pin:focus-visible{outline:3px solid #ed9933;outline-offset:2px;background:rgba(255,218,125,.24)}
.coords-caption{font-size:13px;color:#546f7b;line-height:1.6;margin:8px 0 17px}
.coords-answer-list{display:grid;gap:9px}
.coords-columns{display:grid;grid-template-columns:1fr 1.65fr 1.65fr;gap:12px;padding:0 14px;font-size:12px;font-weight:800;color:#39566b}
.coords-answer-row{display:grid;grid-template-columns:1fr 1.65fr 1.65fr;gap:10px 12px;align-items:center;padding:12px 14px;background:#f7fbfd;border:1px solid #cfdee8;border-radius:13px;transition:background .18s,border-color .18s}
.coords-answer-row.coord-focus{background:#fff3d9;border-color:#e4a83a;box-shadow:0 0 0 2px #ffe3a1}
.coords-answer-row strong{color:#163c61;font-size:16px}
.coords-answer-row label{display:grid;gap:5px;font-size:12px;font-weight:700;color:#385268}
.coords-answer-row select{box-sizing:border-box;width:100%;min-width:0;padding:10px 9px;border:1px solid #b7cad7;border-radius:9px;background:#fff;color:#1d364d;font:inherit;font-size:15px}
.coords-answer-row select.coord-right{border-color:#288052;background:#e6f7e9}
.coords-answer-row select.coord-wrong{border-color:#c55149;background:#fff0ee}
.coords-row-feedback{grid-column:1/-1;color:#526c7b;font-size:12px;min-height:0}
.coords-help{margin:14px 0;padding:9px 12px;background:#f0f6fa;border-radius:12px;border:1px solid #d7e3eb;color:#254863}
.coords-help summary{cursor:pointer;font-weight:800}
.coords-help p{margin:8px 0 0;font-size:13px;line-height:1.6}
@media(max-width:580px){
 .coords-answer-row{grid-template-columns:1fr 1fr;padding:11px;gap:8px}
 .coords-answer-row strong{grid-column:1/-1}
 .coords-columns{display:none}
 .coords-answer-row select{font-size:14px}
 .coords-row-feedback{grid-column:1/-1}
}