:root {
  --bg: #07101f;
  --bg-soft: #0c1730;
  --panel: rgba(11, 21, 42, 0.9);
  --panel-2: rgba(16, 30, 60, 0.92);
  --text: #eef4ff;
  --muted: #b9c7e6;
  --line: rgba(255,255,255,0.08);
  --brand: #82d8ff;
  --accent: #ffc96b;
  --accent-2: #ff8d67;
  --shadow: 0 18px 60px rgba(0,0,0,0.34);
  --radius: 24px;
  --radius-sm: 16px;
  --max: 1240px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 20% 20%, rgba(130,216,255,0.10), transparent 24%),
    radial-gradient(circle at 80% 0%, rgba(255,141,103,0.12), transparent 22%),
    linear-gradient(180deg, #050b16 0%, #081328 55%, #09162d 100%);
  line-height:1.65;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(var(--max), calc(100% - 32px));margin:0 auto}
.topbar{
  position:sticky;top:0;z-index:50;
  backdrop-filter: blur(16px);
  background:rgba(6,12,24,0.82);
  border-bottom:1px solid var(--line);
}
.topbar-inner{display:flex;align-items:center;gap:18px;padding:12px 0}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand img{width:54px;height:54px;object-fit:contain;background:rgba(255,255,255,0.04);border-radius:14px;padding:8px}
.brand span{display:flex;flex-direction:column;line-height:1.1}
.brand strong{font-size:1rem}
.brand small{color:var(--muted);font-size:.8rem}
.nav{display:flex;flex-wrap:wrap;gap:8px;flex:1}
.nav a{padding:10px 14px;border-radius:999px;color:var(--muted);font-size:.95rem;border:1px solid transparent}
.nav a:hover,.nav a.active{background:rgba(255,255,255,0.06);border-color:var(--line);color:var(--text)}
.topbar-actions{display:flex;align-items:center;gap:10px}
main{padding-bottom:64px}
.hero,.page-hero{padding:48px 0 18px}
.hero-grid,.page-hero-grid,.page-hero-wrap{display:grid;grid-template-columns:1.08fr .92fr;gap:26px;align-items:stretch}
.kicker{color:var(--accent);text-transform:uppercase;letter-spacing:.14em;font-size:.78rem;font-weight:700;margin-bottom:14px}
h1{font-size:clamp(2.2rem,5vw,4.3rem);line-height:1.02;margin:0 0 18px}
h2{font-size:clamp(1.5rem,3vw,2.4rem);line-height:1.1;margin:0 0 14px}
h3{font-size:1.15rem;margin:0 0 10px}
p{margin:0 0 14px;color:var(--muted)}
.lead{font-size:1.13rem;color:var(--text)}
.hero-copy,.hero-card,.panel,.stage,.image-panel,.section-nav,.mini-card,.fact-card,.quote-box,.source-box{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.hero-copy{padding:34px}
.hero-card,.image-panel{overflow:hidden}
.hero-card img,.cover-img{width:100%;height:100%;object-fit:cover;min-height:320px}
.hero-actions,.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 18px;border-radius:999px;font-weight:700;border:1px solid var(--line);background:rgba(255,255,255,0.04)}
.btn-primary{background:linear-gradient(135deg, var(--brand), #b5f0ff);color:#062238;border:none}
.btn-secondary:hover,.btn:hover{transform:translateY(-1px)}
.section{padding:18px 0}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.panel{padding:28px}
.panel strong{color:var(--text)}
.fact-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.fact{padding:16px;border-radius:18px;background:var(--panel-2);border:1px solid var(--line)}
.fact .label{font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--brand);margin-bottom:5px}
.fact .value{font-size:1.03rem;font-weight:700}
.topic-list,.subnav-list{display:grid;gap:12px}
.topic,.subnav-link{padding:15px 16px;border-radius:18px;background:var(--panel-2);border:1px solid var(--line)}
.topic strong,.subnav-link strong{display:block;margin-bottom:4px}
.planet-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.planet-card,.subpage-card{overflow:hidden;background:var(--panel);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.planet-card img,.subpage-card img{height:230px;object-fit:cover;width:100%}
.planet-card .content,.subpage-card .content{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.breadcrumbs{color:var(--muted);font-size:.92rem;margin-bottom:12px}
.section-nav{padding:18px 20px}
.section-nav .subnav-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stage{padding:26px}
.figure-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:22px;align-items:start}
.image-panel figure{margin:0}
.image-panel img{width:100%;max-height:620px;object-fit:contain;background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01))}
.image-panel figcaption{padding:14px 18px;border-top:1px solid var(--line);color:var(--muted)}
.copy-stack{display:grid;gap:18px}
.mini-card,.quote-box,.source-box{padding:20px}
.mini-card h3,.quote-box h3,.source-box h3{margin-bottom:8px}
.copy-columns{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.quote-box{background:linear-gradient(135deg, rgba(130,216,255,0.08), rgba(255,201,107,0.06));}
.note-list{padding-left:18px;color:var(--muted);margin:0}
.note-list li{margin-bottom:8px}
.speak-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,0.06);color:var(--text);font-weight:700;cursor:pointer}
.speak-btn:hover{background:rgba(255,255,255,0.1)}
.speak-btn.is-speaking{background:rgba(255,141,103,0.2);border-color:rgba(255,141,103,0.45)}
.hero-copy > .speak-btn,.panel > .speak-btn,.mini-card > .speak-btn,.image-panel > .speak-btn,.subpage-card .content > .speak-btn{margin-bottom:14px}
.callout{background:linear-gradient(135deg, rgba(255,201,107,0.09), rgba(255,141,103,0.07))}
.footer{padding:30px 0 60px;color:var(--muted)}
.footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}
.lightbox{position:fixed;inset:0;background:rgba(2,6,16,.92);display:none;align-items:center;justify-content:center;padding:24px;z-index:120}
.lightbox.open{display:flex}.lightbox img{max-width:min(1200px,95vw);max-height:86vh;border-radius:24px}.lightbox button{position:absolute;top:18px;right:18px}
.badge{display:inline-flex;padding:7px 12px;border-radius:999px;background:rgba(130,216,255,.08);color:var(--brand);border:1px solid var(--line);font-size:.86rem;font-weight:700}
@media (max-width:1080px){
  .hero-grid,.page-hero-grid,.page-hero-wrap,.figure-grid,.grid-2,.footer-grid{grid-template-columns:1fr}
  .planet-grid,.grid-3{grid-template-columns:repeat(2,1fr)}
  .section-nav .subnav-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  .topbar-inner{flex-wrap:wrap}
  .nav{order:3;width:100%}
  .planet-grid,.grid-3,.fact-grid,.copy-columns,.section-nav .subnav-grid{grid-template-columns:1fr}
  .hero-copy,.panel,.stage{padding:22px}
  h1{font-size:2.3rem}
}


.brand{padding:6px 10px;border-radius:20px;background:linear-gradient(135deg, rgba(255,255,255,.08), rgba(130,216,255,.06));border:1px solid rgba(255,255,255,.08);box-shadow:0 12px 35px rgba(0,0,0,.25)}
.brand img{width:190px;height:auto;object-fit:contain;background:transparent;border-radius:0;padding:0;filter:drop-shadow(0 6px 18px rgba(130,216,255,.22))}
.brand span strong{font-size:1.02rem}
.brand span small{font-size:.82rem;opacity:.95}
.topbar-actions .speak-btn{background:linear-gradient(135deg, var(--accent), #ffdca0);color:#1b1407;border:none;box-shadow:0 10px 24px rgba(255,201,107,.24)}
.topbar-actions .speak-btn:hover,.floating-voice:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(255,201,107,.25)}
.floating-voice{position:fixed;right:18px;bottom:18px;z-index:90;background:linear-gradient(135deg, var(--brand), #d0f5ff);color:#062238;border:none;box-shadow:0 16px 36px rgba(0,0,0,.34);padding:14px 18px;font-size:1rem}
.floating-voice.is-speaking{background:linear-gradient(135deg, var(--accent-2), #ffbe8f);color:#241007}
.lightbox-close{background:rgba(255,255,255,.1);color:var(--text);border:1px solid var(--line);border-radius:999px;padding:10px 16px;cursor:pointer}
.lightbox-close:hover{background:rgba(255,255,255,.16)}
.hero-copy,.panel,.mini-card,.stage,.image-panel,.subpage-card,.section-nav{position:relative}
.mini-card .speak-btn.auto-speak,.subpage-card .content .speak-btn.auto-speak,.panel .speak-btn.auto-speak{margin-bottom:12px;background:rgba(130,216,255,.08)}
@media (max-width:760px){
  .brand{width:100%;justify-content:center}
  .brand img{width:160px}
  .topbar-actions{width:100%;justify-content:flex-end}
  .floating-voice{right:12px;left:12px;bottom:12px;justify-content:center}
}