:root{--navy:#08223e;--ink:#10263b;--muted:#5f7181;--orange:#f47a2a;--blue:#1d78a7;--light:#f5f7f8;--green:#2e7d65;--red:#a94545;--amber:#a76520}
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.feasibility-rail{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:20;display:flex;flex-direction:column;gap:5px}.feasibility-rail .chapter-rail-line{position:absolute;left:6px;top:8px;bottom:8px;width:1px;background:rgba(90,110,125,.28)}.feasibility-rail a{position:relative;display:flex;align-items:center;gap:8px;color:#5f7381;text-decoration:none;font-size:10px;padding:3px 0}.feasibility-rail a i{width:13px;height:13px;border:2px solid #b8c4cb;border-radius:50%;background:white;z-index:2}.feasibility-rail a span{display:none;background:white;padding:5px 8px;border-radius:8px;box-shadow:0 4px 14px rgba(0,0,0,.1)}.feasibility-rail a:hover span,.feasibility-rail a.active span{display:block}.feasibility-rail a.active i{background:var(--orange);border-color:var(--orange)}.feasibility-rail a b{color:var(--orange);margin-right:6px}.story-progress{position:fixed;left:0;top:0;width:100%;height:3px;z-index:100}.story-progress span{display:block;height:100%;width:0;background:var(--orange)}
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/* V1.20 — add warmth, depth and visual anchors to Agreements + Execution */
#agreements,
#execution{isolation:isolate;background:#f4efe6;color:var(--ink)}
#agreements::before,
#execution::before{content:"";position:absolute;inset:0;z-index:-2;pointer-events:none}
#agreements::after,
#execution::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none}

/* Regional / river-system atmosphere for governance */
#agreements::before{
  background:url('challenge-reservoir.jpg') center 42%/cover no-repeat;
  opacity:.28;
  transform:scale(1.02)
}
#agreements::after{
  background:linear-gradient(90deg,rgba(248,245,238,.97) 0%,rgba(248,245,238,.91) 47%,rgba(244,239,230,.72) 100%),linear-gradient(180deg,rgba(255,255,255,.30),rgba(226,214,193,.22))
}
#agreements .agreement-flow>div{background:rgba(255,255,255,.82);border:1px solid rgba(63,92,108,.10);box-shadow:0 14px 34px rgba(30,57,72,.07);backdrop-filter:blur(6px)}
#agreements .governance-cards article{background:rgba(255,255,255,.55);border-radius:0 0 14px 14px;padding:14px 14px 16px}
#agreements .dark-change{background:rgba(13,48,77,.94);color:#fff;box-shadow:0 18px 42px rgba(13,48,77,.16)}
#agreements .dark-change span{color:rgba(255,255,255,.88)}

/* Build-the-future atmosphere for execution */
#execution::before{
  background:url('research-pipeline.jpg') center/cover no-repeat;
  opacity:.32;
  transform:scale(1.04)
}
#execution::after{
  background:linear-gradient(90deg,rgba(248,245,238,.98) 0%,rgba(248,245,238,.90) 45%,rgba(244,239,230,.64) 100%),linear-gradient(180deg,rgba(255,255,255,.22),rgba(224,202,169,.18))
}
#execution .section-wrap{transform:translateY(-10px)}
#execution .section-head{margin-bottom:22px}
#execution .execution-roadmap>div{background:rgba(255,255,255,.88);border-color:rgba(97,91,78,.16);box-shadow:0 14px 34px rgba(64,51,35,.08);backdrop-filter:blur(6px)}
#execution .execution-principle{margin-top:16px;background:rgba(13,48,77,.96);box-shadow:0 18px 42px rgba(13,48,77,.18)}
#execution .section-cta{margin-top:16px}

@media(min-width:901px){
  #agreements,#execution{padding-top:94px;padding-bottom:34px}
  #agreements .split-head,#execution .split-head{gap:48px}
  #agreements .split-head h2,#execution .split-head h2{font-size:clamp(42px,3.7vw,60px)}
}
@media(max-width:760px){
  #agreements::before,#execution::before{opacity:.18}
  #agreements::after,#execution::after{background:rgba(248,245,238,.90)}
  #execution .section-wrap{transform:none}
}

/* V1.21 — cohesive photographic evidence language across Feasibility */
#test,#river,#infrastructure{isolation:isolate;background:#f4efe6;color:var(--ink)}
#test::before,#river::before,#infrastructure::before,#evidence::before{content:"";position:absolute;inset:0;z-index:-2;pointer-events:none;background-size:cover;background-repeat:no-repeat}
#test::after,#river::after,#infrastructure::after,#evidence::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none}
#test::before{background-image:url('vision-city.jpg');background-position:center 48%;opacity:.42;transform:scale(1.03)}
#test::after{background:linear-gradient(90deg,rgba(249,246,239,.97),rgba(249,246,239,.88) 58%,rgba(244,236,222,.67)),linear-gradient(180deg,rgba(255,255,255,.18),rgba(225,204,172,.16))}
#river::before{background-image:url('goal-reservoir.jpg');background-position:center 48%;opacity:.40;transform:scale(1.03)}
#river::after{background:linear-gradient(90deg,rgba(248,245,238,.96),rgba(248,245,238,.84) 58%,rgba(238,230,214,.62)),linear-gradient(180deg,rgba(255,255,255,.20),rgba(213,197,170,.14))}
#infrastructure::before{background-image:url('research-infrastructure-v14.jpg');background-position:center;opacity:.40;transform:scale(1.03)}
#infrastructure::after{background:linear-gradient(90deg,rgba(248,245,238,.97),rgba(248,245,238,.87) 54%,rgba(241,230,212,.64)),linear-gradient(180deg,rgba(255,255,255,.18),rgba(224,198,162,.14))}
#test .test-grid article,#river .river-scenarios article,#infrastructure .infra-grid article{background:rgba(255,255,255,.86);border-color:rgba(66,86,98,.12);box-shadow:0 14px 34px rgba(40,56,65,.08);backdrop-filter:blur(6px)}
#river .truth-banner,#infrastructure .scale-strip>div{background:rgba(13,48,77,.95);box-shadow:0 18px 42px rgba(13,48,77,.16)}
#test .method-band{background:rgba(13,48,77,.95);box-shadow:0 18px 42px rgba(13,48,77,.15)}

/* Add photographic depth to the already-dark analytical chapters */
.water-bg{background:linear-gradient(105deg,rgba(6,37,61,.94) 0%,rgba(7,67,91,.82) 55%,rgba(7,86,119,.66) 100%),url('plan-v2-water-photo.png') center/cover no-repeat}
.energy-bg{background:linear-gradient(105deg,rgba(8,30,50,.94),rgba(22,55,69,.78) 58%,rgba(26,65,77,.62)),url('plan-power-clean-v117.png') center/cover no-repeat}
.environment-bg{background:linear-gradient(105deg,rgba(18,60,50,.93),rgba(35,84,68,.76) 58%,rgba(40,98,78,.60)),url('research-environment-v14.jpg') center/cover no-repeat}
.economics-bg{background:linear-gradient(105deg,rgba(10,31,50,.95),rgba(23,61,78,.80) 58%,rgba(28,69,83,.66)),url('research-economics-v14.jpg') center/cover no-repeat}
.water-paths article,.energy-kpis article,.environment-grid article,.econ-primary article{box-shadow:0 14px 34px rgba(0,0,0,.12);backdrop-filter:blur(8px)}

/* Final evidence page: return to the river and the future rather than a flat gradient */
#evidence{isolation:isolate;background:#08223e;color:white}
#evidence::before{background-image:url('goal-reservoir.jpg');background-position:center;opacity:.52;transform:scale(1.03)}
#evidence::after{background:linear-gradient(110deg,rgba(5,25,43,.96),rgba(8,42,61,.88) 52%,rgba(9,66,82,.70)),linear-gradient(180deg,rgba(5,25,43,.12),rgba(5,25,43,.35))}
#evidence .scorecard>div{background:rgba(255,255,255,.11);backdrop-filter:blur(8px);box-shadow:0 12px 28px rgba(0,0,0,.10)}

/* Give the generational opener slightly warmer Southwest character */
.feas-hero-bg{background-image:url('hero-v16.png');background-position:center;background-size:cover;filter:saturate(1.02) contrast(1.02)}
.feas-hero-shade{background:linear-gradient(90deg,rgba(5,20,35,.90) 0%,rgba(5,20,35,.69) 46%,rgba(63,41,22,.20) 100%)}

@media(min-width:901px){
 #test,#river,#infrastructure{padding-top:94px;padding-bottom:34px}
 #test .section-wrap,#river .section-wrap,#infrastructure .section-wrap{transform:translateY(-4px)}
}
@media(max-width:760px){
 #test::before,#river::before,#infrastructure::before,#evidence::before{opacity:.20}
 #test::after,#river::after,#infrastructure::after{background:rgba(248,245,238,.90)}
 #test .section-wrap,#river .section-wrap,#infrastructure .section-wrap{transform:none}
}

/* V1.22 — make the photographic feasibility language actually visible.
   V1.20/V1.21 used negative-z pseudo layers; Safari painted them behind
   the section background. These sections now use layered backgrounds directly. */

#test,
#river,
#infrastructure,
#agreements,
#execution {
  background-color:#f3ede3;
  background-repeat:no-repeat;
  background-size:cover;
  color:var(--ink);
}

#test {
  background-image:
    linear-gradient(90deg,rgba(248,244,236,.94) 0%,rgba(248,244,236,.82) 53%,rgba(236,220,194,.55) 100%),
    url('vision-city.jpg');
  background-position:center, center 48%;
}
#river {
  background-image:
    linear-gradient(90deg,rgba(248,244,236,.94) 0%,rgba(248,244,236,.80) 52%,rgba(224,209,183,.52) 100%),
    url('goal-reservoir.jpg');
  background-position:center, center 48%;
}
#infrastructure {
  background-image:
    linear-gradient(90deg,rgba(248,244,236,.95) 0%,rgba(248,244,236,.81) 51%,rgba(230,207,176,.52) 100%),
    url('research-infrastructure-v14.jpg');
  background-position:center, center;
}
#agreements {
  background-image:
    linear-gradient(90deg,rgba(248,244,236,.94) 0%,rgba(248,244,236,.79) 50%,rgba(229,208,179,.50) 100%),
    url('challenge-reservoir.jpg');
  background-position:center, center 42%;
}
#execution {
  background-image:
    linear-gradient(90deg,rgba(248,244,236,.94) 0%,rgba(248,244,236,.76) 47%,rgba(224,195,157,.48) 100%),
    url('research-pipeline.jpg');
  background-position:center, center;
}

/* Turn off the old pseudo-background mechanism so it cannot wash out the image. */
#test::before,#test::after,
#river::before,#river::after,
#infrastructure::before,#infrastructure::after,
#agreements::before,#agreements::after,
#execution::before,#execution::after { content:none !important; }

/* Stronger glass surfaces so content remains clear while the Southwest stays visible. */
#test .test-grid article,
#river .river-scenarios article,
#infrastructure .infra-grid article,
#agreements .agreement-flow>div,
#execution .execution-roadmap>div {
  background:rgba(255,255,255,.84);
  border-color:rgba(50,72,84,.14);
  box-shadow:0 14px 34px rgba(31,48,58,.10);
  -webkit-backdrop-filter:blur(7px);
  backdrop-filter:blur(7px);
}
#agreements .governance-cards article {
  background:rgba(255,255,255,.64);
  -webkit-backdrop-filter:blur(5px);
  backdrop-filter:blur(5px);
}
#agreements .dark-change,
#execution .execution-principle,
#river .truth-banner,
#infrastructure .scale-strip>div,
#test .method-band {
  background:rgba(9,43,70,.95);
  box-shadow:0 16px 38px rgba(9,43,70,.16);
}

/* Slightly darker typography on light photographic chapters. */
#test .split-head p,
#river .split-head p,
#infrastructure .split-head p,
#agreements .split-head p,
#execution .split-head p { color:#455b6b; }

/* Ensure iPad landscape uses the image, rather than mobile's opaque fallback. */
@media (min-width:761px) {
  #test,#river,#infrastructure,#agreements,#execution { background-attachment:scroll; }
}
@media (max-width:760px) {
  #test,#river,#infrastructure,#agreements,#execution {
    background-blend-mode:normal;
    background-position:center, center;
  }
}

/* V1.23 — interactive river teaching model */
#river.river-interactive{background:
  linear-gradient(90deg,rgba(248,245,238,.97) 0%,rgba(248,245,238,.93) 52%,rgba(236,226,207,.78) 100%),
  url('goal-reservoir.jpg') center 48%/cover no-repeat;
  padding-top:92px;padding-bottom:28px;align-items:flex-start}
#river.river-interactive::before,#river.river-interactive::after{display:none!important}
.river-wrap{max-width:1220px}
.river-intro{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(330px,.8fr);gap:42px;align-items:end;margin:4px 0 16px}
.river-intro h2{font:800 clamp(34px,3.5vw,54px)/.98 Manrope,Inter,sans-serif;letter-spacing:-.045em;margin:7px 0 8px;color:#0b2e49}
.river-intro p{margin:0;max-width:760px;color:#536979;font-size:16px;line-height:1.48}
.river-key-idea{background:rgba(10,47,76,.94);color:white;border-radius:18px;padding:16px 18px;box-shadow:0 16px 34px rgba(13,48,77,.16)}
.river-key-idea span{display:block;color:#9bd6ee;font-size:10px;font-weight:800;letter-spacing:.14em;margin-bottom:5px}
.river-key-idea strong{display:block;font:700 18px/1.25 Manrope,Inter,sans-serif}
.river-key-idea small{display:block;margin-top:6px;color:#d8e5ec;font-size:12px;line-height:1.35}
.river-simulator{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,.72fr);gap:16px;align-items:stretch}
.river-chart-card,.river-controls-card{background:rgba(255,255,255,.91);border:1px solid rgba(52,78,94,.12);border-radius:20px;box-shadow:0 16px 36px rgba(24,49,64,.10);backdrop-filter:blur(8px)}
.river-chart-card{padding:15px 16px 10px;min-width:0}
.chart-topline{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;padding:0 4px 6px}
.chart-topline>div:first-child strong{display:block;color:#0b2e49;font-size:16px}.chart-topline>div:first-child span{font-size:11px;color:#637684}
.chart-legend{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end;font-size:10px;font-weight:700;color:#536879}
.chart-legend span:before{content:"";display:inline-block;width:16px;height:3px;vertical-align:middle;margin-right:5px;border-radius:3px;background:#0f739c}.chart-legend .legend-without:before{background:#778690}.chart-legend .legend-target:before{height:2px;background:#e68039}
#riverChart{display:block;width:100%;height:auto;max-height:325px;overflow:visible}
.chart-note{font-size:10px;line-height:1.35;color:#6d7c86;border-top:1px solid #e2e7ea;padding:7px 4px 0}
.river-controls-card{padding:16px;display:flex;flex-direction:column;min-width:0}.control-label{font-size:10px;letter-spacing:.12em;font-weight:800;color:#204963;margin-bottom:8px}
.scenario-presets{display:grid;grid-template-columns:1fr;gap:6px;margin-bottom:10px}.scenario-btn{appearance:none;border:1px solid #d6e0e5;background:#f7fafb;color:#183c55;border-radius:10px;padding:8px 10px;text-align:left;font:700 12px/1.2 Inter,sans-serif;cursor:pointer}.scenario-btn.active{background:#0c2f4c;color:white;border-color:#0c2f4c}.scenario-btn:focus-visible,.year-editor select:focus-visible{outline:3px solid rgba(244,124,51,.35);outline-offset:2px}
.year-editor{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}.year-cell{min-width:0}.year-cell label{display:block;font-size:9px;font-weight:800;color:#6a7b86;margin:0 0 3px 2px}.year-cell select{width:100%;min-width:0;border:1px solid #d7e0e5;border-radius:8px;background:white;color:#173a54;font-size:11px;padding:7px 4px}
.year-detail{margin-top:10px;background:#edf4f7;border-radius:12px;padding:10px 11px;color:#173a54;min-height:88px}.year-detail strong{display:block;font-size:12px;margin-bottom:5px}.year-math{display:grid;grid-template-columns:1fr auto;gap:3px 10px;font-size:10px;line-height:1.3}.year-math b{text-align:right}.year-math .net{border-top:1px solid #cbdbe3;padding-top:4px;margin-top:3px;font-weight:800}
.river-takeaway{margin-top:12px;background:rgba(12,47,76,.95);color:white;border-radius:17px;padding:13px 18px;display:grid;grid-template-columns:210px 1fr auto;gap:18px;align-items:center}.river-takeaway strong{font-size:18px}.river-takeaway span{font-size:12px;line-height:1.42;color:#d9e5eb}.river-takeaway em{font-style:normal;font-weight:800;font-size:13px;color:#ffb078;max-width:195px}
#river .section-cta{margin-top:10px}
@media(max-width:1100px){#river.river-interactive{padding:90px 42px 26px}.river-intro{gap:24px}.river-simulator{grid-template-columns:minmax(0,1.35fr) minmax(280px,.75fr)}.river-takeaway{grid-template-columns:180px 1fr}.river-takeaway em{grid-column:2}}
@media(max-width:850px){#river.river-interactive{padding:88px 28px 34px}.river-intro,.river-simulator{grid-template-columns:1fr}.river-intro{gap:12px}.river-controls-card{padding:14px}.scenario-presets{grid-template-columns:repeat(3,1fr)}.scenario-btn{text-align:center}.year-editor{grid-template-columns:repeat(5,1fr)}.river-takeaway{grid-template-columns:1fr;gap:5px}.river-takeaway em{grid-column:auto;max-width:none}}
@media(max-width:560px){.river-intro h2{font-size:38px}.scenario-presets{grid-template-columns:1fr}.year-editor{grid-template-columns:repeat(2,1fr)}.chart-legend{justify-content:flex-start}.chart-topline{flex-direction:column}.river-chart-card{padding:12px 8px 8px}}

/* V1.24 — interactive power teaching model */
#energy.energy-interactive{padding-top:90px;padding-bottom:34px;align-items:flex-start;background:linear-gradient(90deg,rgba(7,34,55,.94),rgba(7,34,55,.78)),url('plan-power-clean-v117.png') center/cover no-repeat}
.energy-wrap{max-width:1220px}.energy-intro{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(330px,.75fr);gap:36px;align-items:end;margin:2px 0 16px}.energy-intro h2{font:800 clamp(34px,3.5vw,54px)/.98 Manrope,Inter,sans-serif;letter-spacing:-.045em;color:#fff;margin:7px 0 8px}.energy-intro p{margin:0;color:#d7e4eb;font-size:15px;line-height:1.5;max-width:760px}.energy-key-idea{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);border-radius:18px;padding:15px 17px;backdrop-filter:blur(9px);color:white}.energy-key-idea span{display:block;color:#ffae72;font-size:10px;font-weight:800;letter-spacing:.14em;margin-bottom:5px}.energy-key-idea strong{display:block;font:700 17px/1.3 Manrope,Inter,sans-serif}.energy-key-idea small{display:block;color:#d4e1e8;font-size:11px;line-height:1.4;margin-top:6px}
.power-simulator{display:grid;grid-template-columns:minmax(0,1.48fr) minmax(300px,.72fr);gap:16px}.power-chart-card,.power-controls-card{background:rgba(255,255,255,.94);border:1px solid rgba(255,255,255,.24);border-radius:20px;box-shadow:0 16px 38px rgba(0,0,0,.2);backdrop-filter:blur(9px)}.power-chart-card{padding:15px 16px 13px;min-width:0}.power-controls-card{padding:16px}.power-legend{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end;font-size:10px;font-weight:700;color:#536879}.power-legend span:before{content:"";display:inline-block;width:16px;height:3px;border-radius:4px;vertical-align:middle;margin-right:5px}.p-nuclear:before{background:#173e59}.p-solar:before{background:#e99a43}.p-demand:before{background:#1492b5}.power-presets{display:grid;grid-template-columns:1fr;gap:6px}.power-preset{border:1px solid #d6e0e5;background:#f7fafb;color:#183c55;border-radius:10px;padding:8px 10px;text-align:left;font:700 12px/1.2 Inter,sans-serif;cursor:pointer}.power-preset.active{background:#0c2f4c;color:white;border-color:#0c2f4c}.component-label{margin-top:14px}.power-switch{display:flex;gap:9px;align-items:center;padding:8px 4px;border-bottom:1px solid #e1e7ea;color:#173a54}.power-switch input{width:19px;height:19px;accent-color:#0f739c}.power-switch span{display:flex;flex-direction:column}.power-switch b{font-size:12px}.power-switch small{font-size:10px;color:#6b7c86;margin-top:2px}.power-explain{margin-top:11px;background:#edf4f7;border-radius:12px;padding:11px;color:#173a54}.power-explain strong{display:block;font-size:12px;margin-bottom:4px}.power-explain span{font-size:10px;line-height:1.4;color:#526976}.power-flow{display:grid;grid-template-columns:repeat(7,auto);align-items:center;justify-content:space-between;gap:6px;border-top:1px solid #e2e7ea;padding:10px 4px 0}.power-flow div{min-width:0}.power-flow span{display:block;font-size:8px;font-weight:800;letter-spacing:.09em;color:#6a7d89}.power-flow b{display:block;font-size:12px;color:#143c57;margin-top:2px}.power-flow i{font-style:normal;color:#e68039;font-weight:900}#powerChart{display:block;width:100%;height:auto;max-height:300px}
.store-water-lesson,.shared-power{margin-top:14px;background:rgba(8,38,62,.92);border:1px solid rgba(255,255,255,.12);border-radius:20px;padding:18px;color:white}.store-water-lesson{display:grid;grid-template-columns:.8fr 1.45fr;gap:18px;align-items:center}.lesson-copy span,.shared-power>div:first-child>span{color:#ffad70;font-size:9px;font-weight:800;letter-spacing:.14em}.lesson-copy h3,.shared-power h3{font:750 21px/1.12 Manrope,Inter,sans-serif;margin:5px 0 6px}.lesson-copy p,.shared-power p{font-size:11px;line-height:1.45;color:#d5e1e8;margin:0}.lesson-diagram{display:flex;align-items:center;justify-content:space-between;gap:7px}.lesson-diagram>div{flex:1;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.13);border-radius:13px;padding:10px;text-align:center}.lesson-diagram b{display:block;font-size:23px;color:#ffb16f}.lesson-diagram span{display:block;font-size:8px;font-weight:800;letter-spacing:.11em;color:#9dc9dd;margin:3px 0}.lesson-diagram strong{font-size:10px;line-height:1.2;display:block}.lesson-diagram i{font-style:normal;color:#ff9b55;font-weight:900}.energy-principle-v124{grid-column:1/-1;display:flex;align-items:center;gap:16px;border-top:1px solid rgba(255,255,255,.14);padding-top:12px}.energy-principle-v124 span{font-size:9px;font-weight:800;letter-spacing:.14em;color:#9bcce1}.energy-principle-v124 strong{font:800 17px/1.1 Manrope,Inter,sans-serif;color:#ffb078}
.shared-power{display:grid;grid-template-columns:.7fr 1.3fr;gap:24px;align-items:center}.shared-hub{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;align-items:stretch}.hub-core{grid-column:1/-1;background:#fff;color:#103550;border-radius:13px;padding:9px 14px;display:flex;align-items:baseline;gap:12px}.hub-core small{font-weight:800;letter-spacing:.1em}.hub-core b{font-size:22px}.hub-core span{font-size:10px;color:#60727e}.hub-use{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.13);border-radius:12px;padding:10px}.hub-use b{display:block;font-size:10px;color:#9fd4e8}.hub-use span{display:block;font-size:9px;color:#d7e2e8;margin-top:3px}.energy-model-note{margin-top:10px;color:#cbdbe4;font-size:9px;line-height:1.45}.energy-model-note strong{color:white}
@media(max-width:950px){.energy-intro,.power-simulator,.store-water-lesson,.shared-power{grid-template-columns:1fr}.power-presets{grid-template-columns:repeat(3,1fr)}.power-preset{text-align:center}.shared-hub{grid-template-columns:repeat(2,1fr)}.hub-core{grid-column:1/-1}}
@media(max-width:600px){#energy.energy-interactive{padding:86px 22px 32px}.energy-intro h2{font-size:37px}.power-presets{grid-template-columns:1fr}.power-flow{grid-template-columns:1fr auto 1fr}.power-flow div:nth-of-type(3),.power-flow i:nth-of-type(3){display:none}.lesson-diagram{display:grid;grid-template-columns:1fr 24px 1fr}.lesson-diagram>div:nth-of-type(3),.lesson-diagram>div:nth-of-type(4){margin-top:4px}.shared-hub{grid-template-columns:1fr}.hub-core{grid-column:auto;flex-wrap:wrap}}
/* V1.25 battery visibility fix */
.p-battery:before{background:#7c5ce0}
.power-flow{grid-template-columns:repeat(9,auto)}
@media(max-width:600px){.power-flow{grid-template-columns:1fr auto 1fr}.power-flow div:nth-of-type(3),.power-flow div:nth-of-type(4),.power-flow i:nth-of-type(3),.power-flow i:nth-of-type(4){display:none}}

/* V1.26 — Infrastructure teaching model */
#infrastructure.infra-interactive{padding-top:88px;padding-bottom:26px;align-items:flex-start}
#infrastructure .infra-wrap{max-width:1240px}
.infra-simulator{margin-top:16px;background:rgba(255,255,255,.82);border:1px solid rgba(54,78,92,.14);border-radius:24px;padding:18px;box-shadow:0 18px 42px rgba(37,55,66,.11);-webkit-backdrop-filter:blur(9px);backdrop-filter:blur(9px)}
.infra-toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.infra-mode,.infra-volume button{appearance:none;border:1px solid #cbd6dc;background:#fff;color:#173e59;border-radius:999px;min-height:42px;padding:9px 15px;font:700 13px/1 Inter,sans-serif;cursor:pointer}
.infra-mode.active,.infra-volume button.active{background:#123f5e;color:#fff;border-color:#123f5e;box-shadow:0 6px 16px rgba(18,63,94,.18)}
.infra-volume{margin-left:auto;display:flex;align-items:center;gap:7px;flex-wrap:wrap}.infra-volume>span{font-size:11px;font-weight:800;letter-spacing:.08em;color:#5a6e7c;margin-right:4px;text-transform:uppercase}
.infra-stage{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(285px,.72fr);gap:16px;align-items:stretch}
.infra-schematic{position:relative;min-height:310px;border-radius:20px;overflow:hidden;background:linear-gradient(180deg,#d9f1fb 0 33%,#efd8b3 33% 100%);border:1px solid rgba(41,73,91,.13)}
.infra-scene{position:absolute;inset:0;padding:22px 22px 18px;display:grid;grid-template-columns:repeat(4,1fr);gap:10px;align-items:center}
.infra-scene.substitution{grid-template-columns:repeat(4,1fr)}
.infra-node{position:relative;z-index:2;background:rgba(255,255,255,.92);border:1px solid rgba(42,69,84,.13);border-radius:18px;padding:15px 12px;min-height:132px;display:flex;flex-direction:column;justify-content:center;text-align:center;box-shadow:0 10px 24px rgba(31,53,67,.08)}
.infra-node .icon{font-size:30px;line-height:1;margin-bottom:8px}.infra-node b{font:800 14px/1.15 Manrope,sans-serif;color:#153b55}.infra-node small{display:block;color:#647784;font-size:11px;line-height:1.35;margin-top:7px}.infra-node.off{opacity:.35;filter:grayscale(1)}
.infra-arrow{position:absolute;top:50%;height:5px;background:#228cb8;border-radius:4px;z-index:1;transform:translateY(-50%)}
.infra-arrow::after{content:"";position:absolute;right:-2px;top:50%;transform:translateY(-50%);border-left:12px solid #228cb8;border-top:8px solid transparent;border-bottom:8px solid transparent}
.infra-arrow.stopped{background:#a6b0b6}.infra-arrow.stopped::after{border-left-color:#a6b0b6}.infra-arrow.a1{left:21%;width:8%}.infra-arrow.a2{left:46%;width:8%}.infra-arrow.a3{left:71%;width:8%}
.infra-route-note{position:absolute;left:22px;bottom:14px;z-index:3;background:rgba(11,46,72,.92);color:#fff;border-radius:999px;padding:7px 11px;font-size:10px;font-weight:800;letter-spacing:.05em}.infra-route-note.alt{background:rgba(37,104,75,.94)}
.infra-readout{display:grid;gap:12px}.infra-answer,.infra-result{background:#103a57;color:#fff;border-radius:18px;padding:18px}.infra-answer>span,.infra-result>span{display:block;font-size:10px;font-weight:800;letter-spacing:.1em;opacity:.72}.infra-answer strong,.infra-result strong{display:block;font:800 20px/1.15 Manrope,sans-serif;margin:8px 0}.infra-answer p{font-size:12px;line-height:1.45;opacity:.84}.infra-result small{display:block;font-size:11px;line-height:1.35;opacity:.72;margin-top:7px}
.infra-gauges{background:#fff;border:1px solid #e0e7eb;border-radius:18px;padding:14px 16px;display:grid;gap:11px}.infra-gauges>div{display:grid;grid-template-columns:1fr 1.5fr auto;align-items:center;gap:9px}.infra-gauges span{font-size:11px;font-weight:700;color:#526874}.infra-gauges b{height:8px;background:#e7edf0;border-radius:99px;overflow:hidden}.infra-gauges i{display:block;height:100%;background:linear-gradient(90deg,#2f87ad,#e88b45);border-radius:99px;transition:width .28s ease}.infra-gauges small{font-size:10px;font-weight:800;color:#435c69;min-width:42px;text-align:right}
.infra-controls{margin-top:14px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:rgba(13,48,77,.94);color:#fff;border-radius:18px;padding:13px 16px}.infra-controls>strong{font-size:12px;margin-right:2px}.infra-controls label{display:flex;align-items:center;gap:6px;background:rgba(255,255,255,.1);padding:8px 10px;border-radius:10px;font-size:11px;font-weight:700}.infra-controls input{width:18px;height:18px;accent-color:#e97d39}.infra-controls small{font-size:10px;opacity:.7;flex:1 1 100%}
.infra-controls.hidden{display:none}
.infra-lesson{margin-top:12px;display:grid;grid-template-columns:auto 1fr;gap:14px;background:#fff7eb;border:1px solid #efd8b7;border-radius:16px;padding:13px 16px;color:#284858}.infra-lesson strong{font-size:12px;color:#b35d24}.infra-lesson span{font-size:12px;line-height:1.4}.infra-disclaimer{margin-top:8px;font-size:9px;line-height:1.4;color:#697b86}
@media(max-width:900px){.infra-stage{grid-template-columns:1fr}.infra-schematic{min-height:280px}.infra-readout{grid-template-columns:1fr 1fr}.infra-answer{grid-column:1/-1}.infra-volume{margin-left:0}}
@media(max-width:760px){#infrastructure.infra-interactive{padding-top:84px}.infra-simulator{padding:12px}.infra-toolbar{align-items:stretch}.infra-mode{flex:1 1 calc(50% - 5px)}.infra-volume{flex:1 1 100%;display:grid;grid-template-columns:1fr 1fr 1fr}.infra-volume>span{grid-column:1/-1}.infra-stage{grid-template-columns:1fr}.infra-schematic{min-height:520px}.infra-scene,.infra-scene.substitution{grid-template-columns:1fr;grid-template-rows:repeat(4,1fr);padding:18px 18px 28px}.infra-node{min-height:88px}.infra-arrow{left:50%!important;width:5px!important;height:8%!important;transform:translateX(-50%);top:auto}.infra-arrow::after{right:auto;left:50%;top:auto;bottom:-8px;transform:translateX(-50%);border-left:8px solid transparent;border-right:8px solid transparent;border-top:12px solid #228cb8;border-bottom:0}.infra-arrow.stopped::after{border-top-color:#a6b0b6;border-left-color:transparent}.infra-arrow.a1{top:22%!important}.infra-arrow.a2{top:46%!important}.infra-arrow.a3{top:70%!important}.infra-readout{grid-template-columns:1fr}.infra-answer{grid-column:auto}.infra-controls{display:grid;grid-template-columns:1fr 1fr}.infra-controls>strong,.infra-controls small{grid-column:1/-1}.infra-lesson{grid-template-columns:1fr}.infra-gauges>div{grid-template-columns:1fr 1.4fr auto}}

/* V1.27 — Infrastructure journey: citizen-first, no control-panel UI */
#infrastructure.infra-journey{padding-top:88px;padding-bottom:30px;align-items:flex-start}
.infra-journey .infra-wrap{max-width:1240px}
.journey-chooser{margin-top:18px}
.journey-question{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:14px;background:rgba(13,48,77,.96);color:#fff;border-radius:18px;padding:15px 18px}
.journey-question span{font-size:10px;font-weight:800;letter-spacing:.11em;color:#f0a05d}.journey-question strong{font:800 17px/1.2 Manrope,sans-serif}.journey-question small{font-size:11px;opacity:.7}
.journey-options{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:12px 0}
.journey-option{appearance:none;border:2px solid rgba(33,67,87,.13);background:rgba(255,255,255,.9);border-radius:20px;padding:16px;text-align:left;display:grid;grid-template-columns:48px 1fr auto;gap:13px;align-items:center;cursor:pointer;color:#173d56;min-height:92px;box-shadow:0 10px 25px rgba(32,54,67,.06)}
.journey-option.active{border-color:#e6813d;background:#fff8ef;box-shadow:0 12px 30px rgba(117,70,35,.11)}.journey-letter{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:#123f5e;color:#fff;font:800 18px Manrope,sans-serif}.journey-option.active .journey-letter{background:#e6813d}.journey-option b{display:block;font:800 15px Manrope,sans-serif}.journey-option small{display:block;margin-top:5px;font-size:11px;line-height:1.35;color:#657984}.journey-option>i{font-style:normal;font-size:11px;font-weight:800;color:#b86028}
.journey-panel{background:rgba(255,255,255,.88);border:1px solid rgba(54,78,92,.14);border-radius:24px;padding:20px;box-shadow:0 18px 42px rgba(37,55,66,.10);-webkit-backdrop-filter:blur(9px);backdrop-filter:blur(9px)}
.journey-title{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(260px,.75fr);column-gap:28px}.journey-title>span{grid-column:1/-1;color:#b55d25;font-size:10px;font-weight:800;letter-spacing:.11em}.journey-title h3{font:800 27px/1.08 Manrope,sans-serif;color:#123a55;margin:7px 0 0}.journey-title p{font-size:12px;line-height:1.5;color:#5c707c;margin:7px 0 0}
.journey-flow{display:grid;grid-template-columns:1fr 30px 1fr 30px 1fr 30px 1fr;align-items:center;margin:18px 0 12px;background:linear-gradient(180deg,#dff1f6 0 44%,#ecd4ad 44% 100%);border-radius:20px;padding:20px;min-height:184px;overflow:hidden}
.journey-step{background:rgba(255,255,255,.94);border:1px solid rgba(42,69,84,.13);border-radius:17px;padding:14px 12px;text-align:center;min-height:130px;display:flex;flex-direction:column;justify-content:center;box-shadow:0 8px 20px rgba(31,53,67,.07)}.journey-icon{font-size:27px;line-height:1;margin-bottom:7px}.journey-step small{font-size:9px;font-weight:800;letter-spacing:.09em;color:#c36b31}.journey-step b{font:800 13px/1.15 Manrope,sans-serif;color:#153b55;margin-top:4px}.journey-step p{font-size:10px;line-height:1.35;color:#647784;margin:6px 0 0}.journey-arrow{text-align:center;font-style:normal;font-size:24px;font-weight:800;color:#2789ad}
.journey-explain{display:grid;grid-template-columns:auto 1fr;gap:14px;background:#f4eee3;border-radius:14px;padding:12px 15px;color:#284858}.journey-explain strong{font-size:11px;color:#b35d24}.journey-explain span{font-size:11px;line-height:1.4}.journey-takeaway{margin-top:10px;background:#103a57;color:#fff;border-radius:16px;padding:13px 16px;display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:center}.journey-takeaway span{font-size:9px;font-weight:800;letter-spacing:.1em;color:#f0a05d}.journey-takeaway strong{font:700 13px/1.4 Manrope,sans-serif}
.journey-volume{margin-top:12px;display:flex;justify-content:space-between;align-items:center;gap:16px;background:rgba(255,255,255,.9);border:1px solid rgba(54,78,92,.13);border-radius:16px;padding:12px 15px}.journey-volume span{display:block;font-size:9px;font-weight:800;letter-spacing:.09em;color:#b55d25}.journey-volume strong{font:800 13px Manrope,sans-serif;color:#173e59}.journey-volume-buttons{display:flex;gap:7px}.journey-volume-buttons button{appearance:none;border:1px solid #cbd6dc;background:#fff;color:#173e59;border-radius:999px;min-height:40px;padding:8px 13px;font:800 11px Inter,sans-serif;cursor:pointer}.journey-volume-buttons button.active{background:#123f5e;color:#fff;border-color:#123f5e}
.journey-scale{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;align-items:center;gap:9px;margin-top:9px;background:#fff7eb;border:1px solid #efd8b7;border-radius:15px;padding:11px 14px}.journey-scale span{text-align:center;font-size:9px;color:#667985}.journey-scale b{display:block;color:#173e59;font:800 11px Manrope,sans-serif}.journey-scale>i{font-style:normal;color:#d3783a;font-weight:800}.journey-scale.substitution span:nth-of-type(n+2){opacity:.45}.journey-details{margin-top:9px;background:rgba(255,255,255,.76);border:1px solid rgba(54,78,92,.13);border-radius:14px;overflow:hidden}.journey-details summary{cursor:pointer;padding:11px 14px;font-size:11px;font-weight:800;color:#173e59}.journey-details>div{padding:0 14px 12px}.journey-details p{font-size:10px;line-height:1.5;color:#627580;margin:6px 0}
@media(max-width:760px){.journey-question{grid-template-columns:1fr}.journey-options{grid-template-columns:1fr}.journey-option{grid-template-columns:44px 1fr}.journey-option>i{display:none}.journey-title{grid-template-columns:1fr}.journey-flow{grid-template-columns:1fr;gap:6px}.journey-arrow{transform:rotate(90deg);font-size:20px}.journey-step{min-height:88px}.journey-explain,.journey-takeaway{grid-template-columns:1fr}.journey-volume{align-items:flex-start;flex-direction:column}.journey-volume-buttons{width:100%}.journey-volume-buttons button{flex:1}.journey-scale{grid-template-columns:1fr}.journey-scale>i{transform:rotate(90deg);text-align:center}}

/* V1.28 — infrastructure portfolio builder */
.portfolio-builder{margin-top:30px;background:rgba(255,255,255,.94);border:1px solid rgba(14,42,59,.13);border-radius:28px;padding:28px;box-shadow:0 24px 70px rgba(15,43,59,.10)}
.portfolio-topline{display:grid;gap:5px;margin-bottom:20px}.portfolio-topline>span,.portfolio-lesson>span,.thought-panel>div:first-child>span{font-size:11px;letter-spacing:.18em;font-weight:800;color:#c86b35}.portfolio-topline strong{font-size:20px;color:#17384b}.portfolio-topline small{color:#61727b}
.portfolio-paths{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.portfolio-path{padding:18px;border-radius:20px;background:#f5f2ea;border:1px solid rgba(14,42,59,.10)}.path-head{display:flex;justify-content:space-between;gap:14px;align-items:start}.path-head span{font-size:10px;letter-spacing:.12em;font-weight:800;color:#63737b}.path-head strong{display:block;margin-top:5px;font-size:15px;color:#17384b;line-height:1.25}.path-head>b{white-space:nowrap;font-size:18px;color:#c86b35}.path-control{display:grid;grid-template-columns:44px 1fr 44px;gap:9px;align-items:center;margin:18px 0 12px}.path-control button{width:44px;height:44px;border-radius:50%;border:1px solid #bdc7c8;background:white;color:#17384b;font-size:24px;cursor:pointer}.path-control input{width:100%;accent-color:#c86b35}.path-meta{display:grid;gap:5px;font-size:11px;color:#66777e}.path-meta b{color:#17384b}
.portfolio-results{margin-top:18px;padding:22px;border-radius:22px;background:#17384b;color:white}.meter-label,.meter-foot{display:flex;justify-content:space-between;gap:16px;align-items:end}.meter-label span{font-size:11px;letter-spacing:.14em;font-weight:800;color:#c9d4d8}.meter-label strong{font-size:23px}.meter-track{height:15px;background:rgba(255,255,255,.15);border-radius:99px;overflow:hidden;margin:12px 0 9px}.meter-track i{display:block;height:100%;width:58.33%;background:#d8783f;border-radius:inherit;transition:width .3s ease}.meter-foot{font-size:12px;color:#d8e0e2}.meter-foot b{color:#f0b183}.result-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,.14);margin-top:20px}.result-cards>div{background:#17384b;padding:18px}.result-cards span{display:block;font-size:10px;letter-spacing:.12em;color:#bfcdd1;font-weight:800}.result-cards strong{display:block;font-size:24px;margin:6px 0}.result-cards small{color:#aebfc4}
.portfolio-lesson{margin:18px 0;padding:18px 20px;border-left:4px solid #d8783f;background:#f5f2ea}.portfolio-lesson strong{display:block;margin-top:5px;color:#17384b;font-size:18px;line-height:1.35}.thought-button{width:100%;min-height:54px;border:1px solid rgba(14,42,59,.16);border-radius:15px;background:white;color:#17384b;display:flex;justify-content:space-between;align-items:center;padding:0 18px;font-weight:800;font-size:15px;cursor:pointer}.thought-button span{font-size:22px}.thought-panel{margin-top:10px;padding:22px;border-radius:18px;background:#eef1ee}.thought-panel h3{margin:5px 0;color:#17384b}.thought-panel p{color:#596b74}.thought-numbers{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:18px 0}.thought-numbers>div{background:white;padding:14px;border-radius:12px}.thought-numbers span{display:block;font-size:9px;letter-spacing:.1em;color:#687980;font-weight:800}.thought-numbers strong{font-size:21px;color:#17384b}.thought-warning{font-size:12px!important}.portfolio-builder .journey-details{margin-top:14px}
@media(max-width:900px){.portfolio-paths{grid-template-columns:1fr}.result-cards{grid-template-columns:1fr}.thought-numbers{grid-template-columns:1fr 1fr}.portfolio-builder{padding:20px}.meter-label,.meter-foot{align-items:start;flex-direction:column;gap:4px}}
@media(max-width:520px){.thought-numbers{grid-template-columns:1fr}.path-head{flex-direction:column}.portfolio-builder{padding:16px;border-radius:20px}}