/* ===== RESET & VARIABLES ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg-primary:#0a0e1a;--bg-secondary:#0d1224;--bg-card:#131832;--bg-card-hover:#1a2148;
  --text-primary:#e8eaf6;--text-secondary:#9fa8da;--text-muted:#5c6bc0;
  --accent-electric:#ffd700;--accent-cyan:#00e5ff;--accent-purple:#7c4dff;
  --accent-blue:#2979ff;--accent-green:#00e676;--accent-red:#ff5252;--accent-orange:#ffab40;
  --gradient-hero:linear-gradient(135deg,#0a0e1a 0%,#1a0a2e 40%,#0d2137 70%,#0a0e1a 100%);
  --font-display:'Orbitron',sans-serif;--font-body:'Inter',sans-serif;--font-mono:'Fira Code',monospace;
  --radius:12px;--shadow-glow:0 0 30px rgba(0,229,255,.15);
}
[data-theme="light"]{
  --bg-primary:#f5f7ff;--bg-secondary:#e8ecff;--bg-card:#ffffff;--bg-card-hover:#f0f4ff;
  --text-primary:#1a1a2e;--text-secondary:#3949ab;--text-muted:#7986cb;
  --shadow-glow:0 4px 20px rgba(41,121,255,.1);
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-body);background:var(--bg-primary);color:var(--text-primary);line-height:1.7;overflow-x:hidden;transition:background .4s,color .4s}
a{color:var(--accent-cyan);text-decoration:none;transition:color .3s}
a:hover{color:var(--accent-electric)}
a:focus-visible,button:focus-visible{outline:3px solid var(--accent-electric);outline-offset:4px}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}
.skip-link{position:fixed;top:.75rem;left:.75rem;z-index:2000;background:var(--accent-electric);color:#08101d;padding:.7rem 1rem;border-radius:8px;font-weight:700;transform:translateY(-150%);transition:transform .2s}
.skip-link:focus{transform:translateY(0)}

/* ===== NAVIGATION ===== */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;padding:.8rem 0;backdrop-filter:blur(16px);background:rgba(10,14,26,.85);border-bottom:1px solid rgba(0,229,255,.1);transition:all .3s}
[data-theme="light"] .navbar{background:rgba(245,247,255,.9)}
.navbar .container{display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-family:var(--font-display);font-size:1.1rem;font-weight:700;color:var(--accent-electric)}
.nav-logo span{color:var(--accent-cyan)}
.nav-links{display:flex;gap:1.5rem;list-style:none;align-items:center}
.nav-links a{color:var(--text-secondary);font-size:.85rem;font-weight:500;white-space:nowrap}
.nav-links a:hover{color:var(--accent-electric)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.nav-toggle span{width:26px;height:2px;background:var(--text-primary);border-radius:2px;transition:all .3s}
.theme-toggle{background:none;border:2px solid var(--accent-cyan);color:var(--accent-cyan);width:38px;height:38px;border-radius:50%;cursor:pointer;font-size:1.1rem;display:flex;align-items:center;justify-content:center;transition:all .3s}
.theme-toggle:hover{background:var(--accent-cyan);color:var(--bg-primary)}

/* ===== HERO ===== */
.hero{min-height:100vh;display:flex;align-items:center;justify-content:flex-start;text-align:left;position:relative;background:linear-gradient(90deg,rgba(5,9,20,.95) 0%,rgba(5,9,20,.8) 44%,rgba(5,9,20,.32) 75%,rgba(5,9,20,.6) 100%),url("images/hero-electricity-history.webp") center/cover no-repeat;overflow:hidden;padding:6rem 1.5rem 4rem}
#sparkCanvas{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:1}
.hero-content{position:relative;z-index:2;max-width:760px;margin-left:max(0px,calc((100vw - 1200px)/2))}
.hero h1{font-family:var(--font-display);font-size:clamp(2rem,6vw,4.5rem);font-weight:900;line-height:1.15;margin-bottom:1rem;background:linear-gradient(135deg,var(--accent-electric),var(--accent-cyan),var(--accent-purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero .subtitle{font-size:clamp(1rem,2.5vw,1.4rem);color:var(--text-secondary);margin-bottom:2.5rem;font-weight:300;line-height:1.6}
.hero-buttons{display:flex;gap:1rem;flex-wrap:wrap;justify-content:flex-start}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 2rem;border-radius:50px;font-weight:600;font-size:.95rem;text-decoration:none;transition:all .3s;cursor:pointer;border:none;font-family:var(--font-body)}
.btn-primary{background:linear-gradient(135deg,var(--accent-cyan),var(--accent-blue));color:#fff;box-shadow:0 4px 20px rgba(0,229,255,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,229,255,.4)}
.btn-secondary{background:transparent;color:var(--accent-electric);border:2px solid var(--accent-electric)}
.btn-secondary:hover{background:rgba(255,215,0,.1);transform:translateY(-2px)}
.scroll-hint{position:absolute;bottom:2rem;left:50%;transform:translateX(-50%);animation:bounce 2s infinite;z-index:2}
@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(-10px)}}

/* ===== SECTIONS ===== */
.section{padding:5rem 0}
.section-alt{background:var(--bg-secondary)}
.section-header{text-align:center;margin-bottom:3.5rem}
.section-header h2{font-family:var(--font-display);font-size:clamp(1.6rem,4vw,2.8rem);font-weight:700;margin-bottom:.8rem;background:linear-gradient(135deg,var(--accent-electric),var(--accent-cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.section-header p{color:var(--text-secondary);max-width:650px;margin:0 auto;font-size:1.05rem}
.section-header .divider{width:80px;height:3px;background:linear-gradient(90deg,var(--accent-electric),var(--accent-cyan));margin:1rem auto;border-radius:2px}

/* ===== INTRO CARDS ===== */
.intro-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.5rem;margin-top:2rem}
.intro-card{background:var(--bg-card);border:1px solid rgba(0,229,255,.1);border-radius:var(--radius);overflow:hidden;transition:all .3s;display:flex;flex-direction:column}
.intro-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-glow);border-color:var(--accent-cyan)}
.intro-card .intro-image{width:100%;height:clamp(180px,18vw,230px);aspect-ratio:16/9;object-fit:cover;background:var(--bg-secondary);filter:saturate(.92) contrast(1.05);transition:transform .45s,filter .45s}
.intro-card:hover .intro-image{transform:scale(1.04);filter:saturate(1.08) contrast(1.1)}
.intro-card .intro-body{padding:1.35rem;display:grid;gap:.55rem;flex:1}
.intro-card .icon{font-size:2.5rem;margin-bottom:.8rem;display:block}
.intro-card h3{font-family:var(--font-display);font-size:1rem;color:var(--accent-electric)}
.intro-card p{color:var(--text-secondary);font-size:.9rem;line-height:1.65}
.intro-card .micro-note{font-size:.74rem;color:var(--accent-cyan);margin-top:auto}

/* ===== VISUAL STORY ===== */
.visual-story{display:grid;gap:2rem;margin-top:3rem}
.visual-feature{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(300px,.95fr);gap:2rem;align-items:center}
.visual-feature:nth-child(even){grid-template-columns:minmax(300px,.95fr) minmax(0,1.05fr)}
.visual-feature:nth-child(even) .visual-copy{order:2}
.visual-feature:nth-child(even) .visual-media{order:1}
.visual-copy .eyebrow{color:var(--accent-cyan);font-family:var(--font-mono);font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:.45rem}
.visual-copy h3{font-family:var(--font-display);font-size:clamp(1.25rem,3vw,2rem);line-height:1.25;color:var(--accent-electric);margin-bottom:.8rem}
.visual-copy p{color:var(--text-secondary);font-size:.98rem;line-height:1.75;margin-bottom:.75rem}
.visual-points{list-style:none;display:grid;gap:.45rem;margin-top:.8rem;color:var(--text-secondary);font-size:.9rem}
.visual-points li{border-left:2px solid rgba(0,229,255,.35);padding-left:.75rem}
.visual-media{position:relative;overflow:hidden;border-radius:var(--radius);border:1px solid rgba(0,229,255,.16);background:var(--bg-card)}
.visual-media img{width:100%;height:clamp(230px,30vw,430px);aspect-ratio:16/10;object-fit:cover;filter:saturate(.95) contrast(1.08)}
.visual-caption{position:absolute;left:1rem;right:1rem;bottom:1rem;color:#fff;background:rgba(5,9,20,.72);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:.75rem .85rem;font-size:.8rem;line-height:1.45}

/* ===== TIMELINE ===== */
.timeline-container{position:relative;padding:2rem 0}
.timeline-line{position:absolute;left:50%;top:0;bottom:0;width:3px;background:linear-gradient(180deg,var(--accent-cyan),var(--accent-purple),var(--accent-electric));transform:translateX(-50%);border-radius:2px}
.timeline-item{display:flex;align-items:flex-start;margin-bottom:3rem;position:relative;width:50%}
.timeline-item:nth-child(odd){padding-right:3rem;text-align:right;margin-left:auto}
.timeline-item:nth-child(even){padding-left:3rem}
.timeline-dot{position:absolute;width:20px;height:20px;background:var(--accent-cyan);border-radius:50%;border:3px solid var(--bg-primary);z-index:2;box-shadow:0 0 15px rgba(0,229,255,.5)}
.timeline-item:nth-child(odd) .timeline-dot{right:-10px}
.timeline-item:nth-child(even) .timeline-dot{left:-10px}
.timeline-content{background:var(--bg-card);border:1px solid rgba(0,229,255,.1);border-radius:var(--radius);padding:1.5rem;transition:all .3s;position:relative}
.timeline-content:hover{box-shadow:var(--shadow-glow)}
.timeline-year{font-family:var(--font-display);color:var(--accent-electric);font-size:1.3rem;font-weight:700;margin-bottom:.4rem}
.timeline-title{font-size:1.1rem;font-weight:600;color:var(--text-primary);margin-bottom:.5rem}
.timeline-text{color:var(--text-secondary);font-size:.9rem;line-height:1.6}
.timeline-source{display:inline-block;margin-top:.6rem;font-size:.75rem;color:var(--accent-cyan);background:rgba(0,229,255,.08);padding:.2rem .6rem;border-radius:4px}
@media(max-width:768px){
  .timeline-line{left:20px}
  .timeline-item{width:100%;padding-left:3.5rem!important;padding-right:0!important;text-align:left!important;margin-left:0!important}
  .timeline-dot{left:11px!important;right:auto!important}
}

/* ===== FIGURES GRID ===== */
.figures-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}
.figure-card{background:var(--bg-card);border:1px solid rgba(0,229,255,.1);border-radius:var(--radius);overflow:hidden;transition:all .3s;display:flex;flex-direction:column}
.figure-card:hover{transform:translateY(-6px);box-shadow:0 8px 30px rgba(0,229,255,.2)}
.figure-avatar{height:250px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;background:linear-gradient(135deg,#0b1020,#151a33)}
.figure-avatar img{width:100%;height:100%;object-fit:contain;object-position:center top;padding:.35rem;filter:grayscale(.18) contrast(1.08) saturate(.9);transition:transform .45s,filter .45s}
.figure-card:hover .figure-avatar img{transform:scale(1.045);filter:grayscale(0) contrast(1.1) saturate(1)}
.figure-avatar::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 52%,rgba(5,9,20,.72));pointer-events:none}
.figure-info{padding:1.2rem;flex:1;display:flex;flex-direction:column}
.figure-name{font-family:var(--font-display);font-size:1rem;color:var(--accent-electric);margin-bottom:.3rem}
.figure-dates{font-size:.8rem;color:var(--text-muted);margin-bottom:.3rem;font-family:var(--font-mono)}
.figure-country{font-size:.85rem;color:var(--accent-cyan);margin-bottom:.5rem}
.figure-role{font-size:.9rem;color:var(--text-secondary);margin-bottom:.6rem;line-height:1.5;flex:1}
.figure-trivia{font-size:.75rem;color:var(--accent-purple);border-top:1px solid rgba(124,77,255,.15);padding-top:.5rem;margin-top:auto;font-style:italic}
.figure-source{font-size:.7rem;color:var(--text-muted);margin-top:.3rem}
.figure-source a,.timeline-source a,.source-ref a{color:inherit;text-decoration:underline;text-decoration-color:rgba(0,229,255,.45)}

/* ===== TECHNICAL EXPLANATIONS ===== */
.tech-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:2rem}
.tech-card{background:var(--bg-card);border:1px solid rgba(0,229,255,.1);border-radius:var(--radius);padding:2rem;transition:all .3s}
.tech-card:hover{box-shadow:var(--shadow-glow)}
.tech-card h3{font-family:var(--font-display);color:var(--accent-cyan);font-size:1.05rem;margin-bottom:.8rem;display:flex;align-items:center;gap:.6rem}
.tech-card p{color:var(--text-secondary);font-size:.92rem;line-height:1.7}
.analogy-box{background:rgba(255,215,0,.06);border-left:3px solid var(--accent-electric);padding:.8rem 1rem;border-radius:0 8px 8px 0;margin-top:1rem;font-size:.85rem;color:var(--text-secondary)}
.analogy-box strong{color:var(--accent-electric)}

/* ===== WAR OF CURRENTS ===== */
.woc-layout{display:grid;grid-template-columns:1fr auto 1fr;gap:2rem;align-items:center}
.woc-fighter{background:var(--bg-card);border-radius:var(--radius);padding:2.5rem;text-align:center;border:1px solid rgba(255,255,255,.05)}
.woc-fighter.edison{border-color:rgba(255,171,64,.3)}
.woc-fighter.tesla{border-color:rgba(0,229,255,.3)}
.woc-vs{font-family:var(--font-display);font-size:2.5rem;font-weight:900;background:linear-gradient(135deg,var(--accent-electric),var(--accent-cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.woc-fighter h3{font-family:var(--font-display);font-size:1.4rem;margin-bottom:.5rem}
.woc-fighter.edison h3{color:var(--accent-orange)}
.woc-fighter.tesla h3{color:var(--accent-cyan)}
.woc-fighter p{color:var(--text-secondary);font-size:.92rem;line-height:1.6;margin-top:1rem}
.woc-portrait{width:128px;height:128px;margin:0 auto 1rem;border-radius:50%;overflow:hidden;border:2px solid rgba(255,255,255,.12);box-shadow:0 0 28px rgba(0,229,255,.12)}
.woc-portrait img{width:100%;height:100%;object-fit:cover;object-position:center top}
.woc-result{margin-top:3rem;padding:2rem;background:var(--bg-card);border-radius:var(--radius);border:1px solid rgba(0,229,255,.15);text-align:center}
.woc-result p{color:var(--text-secondary)}

/* ===== PORTUGAL SECTION ===== */
.portugal-feature{display:grid;grid-template-columns:minmax(320px,.95fr) minmax(0,1.05fr);gap:2rem;align-items:center;margin-bottom:2rem}
.portugal-feature img{width:100%;height:clamp(240px,30vw,430px);aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius);border:1px solid rgba(0,229,255,.16);filter:saturate(.95) contrast(1.06)}
.portugal-feature h3{font-family:var(--font-display);color:var(--accent-electric);font-size:clamp(1.25rem,3vw,1.9rem);line-height:1.25;margin-bottom:.8rem}
.portugal-feature p{color:var(--text-secondary);font-size:.96rem;line-height:1.75;margin-bottom:.75rem}
.portugal-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}
.pt-card{background:var(--bg-card);border-radius:var(--radius);padding:2rem;border-left:4px solid var(--accent-electric)}
.pt-card h3{font-family:var(--font-display);color:var(--accent-electric);font-size:1rem;margin-bottom:.6rem}
.pt-card p{color:var(--text-secondary);font-size:.9rem;line-height:1.7}
.pt-card .source-ref{font-size:.75rem;color:var(--accent-cyan);margin-top:.5rem;display:block}

/* ===== IMPACT SECTION ===== */
.impact-list{display:grid;gap:1.2rem}
.impact-item{background:var(--bg-card);border-radius:var(--radius);padding:1.8rem;border:1px solid rgba(0,229,255,.08);display:flex;gap:1.2rem;align-items:flex-start;transition:all .3s}
.impact-item:hover{box-shadow:var(--shadow-glow)}
.impact-icon{font-size:2rem;flex-shrink:0;width:60px;height:60px;display:flex;align-items:center;justify-content:center;background:rgba(0,229,255,.06);border-radius:12px}
.impact-item h3{font-size:1.05rem;color:var(--accent-electric);margin-bottom:.3rem}
.impact-item p{color:var(--text-secondary);font-size:.9rem;line-height:1.6}

/* ===== MITOS ===== */
.mitos-container{display:grid;gap:1.2rem}
.mito-card{background:var(--bg-card);border-radius:var(--radius);padding:2rem;border-left:4px solid var(--accent-red)}
.mito-false{color:var(--accent-red);font-size:.9rem;font-weight:600;margin-bottom:.5rem;font-style:italic}
.mito-true{color:var(--accent-green);font-size:.9rem;line-height:1.7}

/* ===== QUIZ ===== */
.quiz-container{max-width:700px;margin:0 auto;background:var(--bg-card);border-radius:var(--radius);padding:2.5rem;border:1px solid rgba(0,229,255,.1)}
.quiz-progress{display:flex;gap:.4rem;margin-bottom:2rem}
.quiz-progress .bar{flex:1;height:4px;background:rgba(255,255,255,.1);border-radius:2px;overflow:hidden}
.quiz-progress .bar.active{background:linear-gradient(90deg,var(--accent-cyan),var(--accent-electric))}
.quiz-question{font-size:1.15rem;font-weight:600;margin-bottom:1.5rem;line-height:1.5}
.quiz-options{display:grid;gap:.8rem}
.quiz-option{padding:1rem 1.2rem;border:2px solid rgba(0,229,255,.15);border-radius:var(--radius);cursor:pointer;transition:all .3s;font-size:.95rem;color:var(--text-primary);background:transparent;text-align:left;width:100%;font-family:var(--font-body)}
.quiz-option:hover{border-color:var(--accent-cyan);background:rgba(0,229,255,.05)}
.quiz-option.correct{border-color:var(--accent-green);background:rgba(0,230,118,.1)}
.quiz-option.wrong{border-color:var(--accent-red);background:rgba(255,82,82,.1)}
.quiz-explanation{margin-top:1.2rem;padding:1rem;background:rgba(0,229,255,.06);border-radius:8px;color:var(--text-secondary);font-size:.9rem;line-height:1.6;display:none}
.quiz-score{text-align:center;display:none}
.quiz-score .score-num{font-family:var(--font-display);font-size:3rem;background:linear-gradient(135deg,var(--accent-electric),var(--accent-cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent}

/* ===== GLOSSARY ===== */
.glossary-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.2rem}
.glossary-term{background:var(--bg-card);border-radius:var(--radius);padding:1.5rem;border:1px solid rgba(0,229,255,.08)}
.glossary-term h3{color:var(--accent-cyan);font-family:var(--font-display);font-size:.95rem;margin-bottom:.4rem}
.glossary-term p{color:var(--text-secondary);font-size:.85rem;line-height:1.6}

/* ===== BIBLIOGRAPHY ===== */
.bib-list{max-width:800px;margin:0 auto;list-style:none;display:grid;gap:.8rem}
.bib-item{padding:1rem 1.2rem;background:var(--bg-card);border-radius:8px;font-size:.9rem;color:var(--text-secondary);border-left:3px solid var(--accent-purple)}
.bib-item .bib-title{color:var(--accent-electric);font-weight:600}

/* ===== GALLERY ===== */
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}
.gallery-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;border:1px solid rgba(0,229,255,.1);display:flex;flex-direction:column;min-height:100%;transition:transform .3s,box-shadow .3s,border-color .3s}
.gallery-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-glow);border-color:rgba(0,229,255,.35)}
.gallery-card img{width:100%;height:clamp(200px,20vw,280px);aspect-ratio:16/10;object-fit:cover;background:var(--bg-secondary)}
.gallery-card figcaption{padding:1.15rem;display:grid;gap:.45rem}
.gallery-card h4{color:var(--accent-electric);font-size:1rem;line-height:1.35}
.gallery-card p{font-size:.85rem;color:var(--text-secondary);line-height:1.6}
.gallery-card .image-credit{font-size:.74rem;color:var(--accent-cyan)}
.gallery-card .image-credit a{text-decoration:underline;text-decoration-color:rgba(0,229,255,.45)}
.media-note{margin:1.5rem auto 0;max-width:820px;color:var(--text-muted);font-size:.84rem;text-align:center}

/* ===== FOOTER ===== */
.portfolio-footer{display:flex;width:min(100% - 3rem,1200px);margin:3rem auto 0;padding:2rem 0;align-items:center;justify-content:space-between;gap:1rem;border-top:1px solid rgba(0,229,255,.12);color:var(--text-muted)}
.portfolio-brand,.portfolio-mail{color:var(--text-primary);text-decoration:none}
.portfolio-brand{display:inline-flex;align-items:center;gap:.75rem;font-weight:800;letter-spacing:-.02em}
.portfolio-brand>span:last-child span{color:var(--accent-cyan)}
.portfolio-brand-mark{display:inline-flex;width:2.35rem;height:2.35rem;align-items:center;justify-content:center;border-radius:50%;color:#08101d;background:linear-gradient(135deg,var(--accent-electric),var(--accent-cyan));font-size:.78rem;font-weight:900}
.portfolio-mail{font-weight:700}
.portfolio-footer p{color:var(--text-muted);font-size:.9rem}

/* ===== SCROLL ANIMATIONS ===== */
.reveal{opacity:0;transform:translateY(30px);transition:all .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ===== RESPONSIVE ===== */
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:rgba(10,14,26,.95);flex-direction:column;padding:1.5rem;gap:1rem;border-bottom:1px solid rgba(0,229,255,.1)}
  .nav-links.open{display:flex}
  .nav-toggle{display:flex}
  .woc-layout{grid-template-columns:1fr}
  .hero-buttons{flex-direction:column;align-items:center}
  .hero{text-align:center;justify-content:center;background-position:center}
  .hero-content{margin-left:0}
  .hero-buttons{justify-content:center}
  .impact-item{flex-direction:column}
  .visual-feature,.visual-feature:nth-child(even),.portugal-feature{grid-template-columns:1fr}
  .visual-feature:nth-child(even) .visual-copy,.visual-feature:nth-child(even) .visual-media{order:initial}
  .visual-caption{position:static;border-radius:0;border-left:none;border-right:none;border-bottom:none}
}

/* ===== SECTION SPAN FULL WIDTH CARDS ===== */
.full-width-bg{background:linear-gradient(135deg,rgba(0,229,255,.03),rgba(124,77,255,.03));padding:3rem 0}

/* Smooth scroll target offset for fixed nav */
[id]{scroll-margin-top:80px}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  #sparkCanvas{display:none}
  .reveal{opacity:1;transform:none}
}

/* ===== MULTI-PAGE STRUCTURE ===== */
main{min-height:65vh}
.nav-links{gap:1rem}
.nav-links a{font-size:.82rem}
.nav-links a[aria-current="page"]{color:var(--accent-electric)}
.page-hero{min-height:44svh;display:flex;align-items:flex-end;position:relative;overflow:hidden;padding:8rem 1.5rem 4rem;background:linear-gradient(90deg,rgba(5,9,20,.96),rgba(5,9,20,.78) 48%,rgba(5,9,20,.28)),var(--page-image, url("images/hero-electricity-history.webp")) center/cover no-repeat;border-bottom:1px solid rgba(0,229,255,.1)}
.page-hero .hero-content{max-width:820px;margin-left:max(0px,calc((100vw - 1200px)/2))}
.page-hero .eyebrow{font-family:var(--font-mono);font-size:.78rem;color:var(--accent-cyan);text-transform:uppercase;letter-spacing:.08em;margin-bottom:.75rem}
.page-hero h1{font-family:var(--font-display);font-size:clamp(2rem,5vw,4rem);font-weight:900;line-height:1.12;margin-bottom:.85rem;background:linear-gradient(135deg,var(--accent-electric),var(--accent-cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.page-hero p{max-width:760px;color:var(--text-secondary);font-size:clamp(1rem,2vw,1.2rem);line-height:1.65}
.home-chapters{padding:4.5rem 0;background:var(--bg-secondary)}
.chapter-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.2rem;margin-top:2rem}
.chapter-card{position:relative;min-height:280px;border-radius:var(--radius);overflow:hidden;border:1px solid rgba(0,229,255,.14);background:var(--bg-card);display:flex;align-items:flex-end;transition:transform .3s,box-shadow .3s,border-color .3s;color:var(--text-primary)}
.chapter-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-glow);border-color:rgba(0,229,255,.38);color:var(--text-primary)}
.chapter-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(.88) contrast(1.08);transition:transform .45s,filter .45s}
.chapter-card:hover img{transform:scale(1.045);filter:saturate(1.05) contrast(1.12)}
.chapter-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,9,20,.08),rgba(5,9,20,.86) 68%,rgba(5,9,20,.96));pointer-events:none}
.chapter-card div{position:relative;z-index:1;padding:1.15rem}
.chapter-card .kicker{font-family:var(--font-mono);font-size:.72rem;color:var(--accent-cyan);text-transform:uppercase;letter-spacing:.08em;margin-bottom:.45rem;display:block}
.chapter-card h3{font-family:var(--font-display);font-size:1.08rem;color:var(--accent-electric);line-height:1.3;margin-bottom:.45rem}
.chapter-card p{font-size:.86rem;color:var(--text-secondary);line-height:1.55}
.home-brief{padding:4rem 0}
.brief-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem;margin-top:2rem}
.brief-item{border-left:3px solid var(--accent-cyan);padding:0 0 0 1rem}
.brief-item h3{font-family:var(--font-display);font-size:1rem;color:var(--accent-electric);margin-bottom:.45rem}
.brief-item p{color:var(--text-secondary);font-size:.9rem;line-height:1.65}
.page-end-nav{padding:3rem 0;background:var(--bg-secondary)}
.next-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}
.next-link{display:block;border:1px solid rgba(0,229,255,.12);border-radius:var(--radius);padding:1.1rem;background:var(--bg-card);transition:transform .3s,border-color .3s,box-shadow .3s}
.next-link:hover{transform:translateY(-3px);border-color:rgba(0,229,255,.35);box-shadow:var(--shadow-glow)}
.next-link span{display:block;color:var(--accent-cyan);font-size:.78rem;font-family:var(--font-mono);margin-bottom:.35rem;text-transform:uppercase;letter-spacing:.06em}
.next-link strong{display:block;color:var(--accent-electric);font-size:1rem;line-height:1.35}
.hero-buttons .btn{white-space:normal;justify-content:center;text-align:center}

@media(max-width:980px){
  .nav-links{gap:1rem}.nav-links a{font-size:.8rem}.brief-grid{grid-template-columns:1fr}
}
@media(max-width:1100px){
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:rgba(10,14,26,.97);flex-direction:column;padding:1.5rem;gap:1rem;border-bottom:1px solid rgba(0,229,255,.1)}
  [data-theme="light"] .nav-links{background:rgba(245,247,255,.98)}
  .nav-links.open{display:flex}
  .nav-toggle{display:flex}
}
@media(max-width:768px){
  .page-hero{min-height:auto;padding:7rem 1.2rem 3rem;align-items:flex-end;background-position:center}
  .page-hero .hero-content{margin-left:0}
  .home-chapters,.home-brief{padding:3.25rem 0}
  .chapter-grid{grid-template-columns:1fr;gap:1rem}
  .chapter-card{min-height:220px}
  .section{padding:3.5rem 0}
  .section-header{margin-bottom:2rem;text-align:left}
  .section-header .divider{margin:1rem 0}
  .section-header p{margin:0;font-size:.98rem}
  .hero{min-height:88svh;padding:6rem 1rem 3rem}
  .hero h1{font-size:clamp(2rem,13vw,3.8rem)}
  .hero .subtitle{font-size:1rem;margin-bottom:1.5rem}
  .btn{width:100%;padding:.85rem 1rem;border-radius:14px}
  .quiz-container{padding:1.25rem}
  .figure-avatar{height:220px}
}
@media(max-width:420px){
  .nav-logo{font-size:.95rem}.container{padding:0 1rem}.page-hero h1{font-size:2.1rem}.chapter-card{min-height:205px}
}
@media(max-width:600px){
  .figures-grid{grid-template-columns:1fr;gap:1rem}
  .figure-card{display:grid;grid-template-columns:104px minmax(0,1fr);align-items:stretch}
  .figure-avatar{height:auto;min-height:100%;border-right:1px solid rgba(0,229,255,.1)}
  .figure-avatar img{height:100%;padding:0;object-fit:cover;object-position:center top}
  .figure-info{padding:.9rem}
  .figure-name{font-size:.9rem}
  .figure-dates,.figure-country{font-size:.75rem}
  .figure-role{font-size:.82rem;line-height:1.55}
  .figure-trivia{font-size:.72rem;line-height:1.45}
  .figure-source{font-size:.66rem}
}

@media(max-width:760px){
  .portfolio-footer{width:min(100% - 1.5rem,1200px);align-items:flex-start;flex-direction:column}
}