:root{
  --navy:#071d4f;--navy2:#04102d;--blue:#0e3a79;--orange:#ff8c24;--cream:#fffaf1;
  --ink:#10213f;--muted:#51607a;--card:#fff;--radius:24px;--focus:#ffd34d;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:#f6f8fc;color:var(--ink);line-height:1.55}.skip-link{position:absolute;left:-9999px;top:0}.skip-link:focus{left:1rem;top:1rem;background:#fff;padding:.8rem 1rem;z-index:999;border:3px solid #000;border-radius:10px}
a,button{font:inherit}.site-header{position:sticky;top:0;z-index:80;display:flex;align-items:center;gap:1.2rem;padding:.85rem 4vw;background:rgba(4,16,45,.97);color:#fff;box-shadow:0 10px 28px #00122d35;backdrop-filter:blur(16px)}.brand{display:flex;align-items:center;gap:.7rem;color:#fff;text-decoration:none;min-width:max-content}.brand-mark{width:44px;height:44px;border-radius:50%;border:3px solid #49a7ff;display:grid;place-items:center;position:relative;box-shadow:0 0 0 5px #ff8c2420,0 0 20px #49a7ff40}.brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#ff8c24;border-radius:999px}.brand-mark:before{width:54px;height:3px;transform:rotate(35deg)}.brand-mark:after{width:54px;height:3px;transform:rotate(-35deg)}.brand-clock{font-size:1.55rem;background:#071d4f;z-index:1}.brand-copy strong{font-size:1.65rem;letter-spacing:-.04em}.brand-copy strong span{color:var(--orange)}.brand-copy small{display:block;color:#cbd8f0;font-size:.72rem}.site-header nav{display:flex;gap:.25rem;align-items:center;flex:1;justify-content:center}.site-header nav a{color:#fff;text-decoration:none;padding:.62rem .75rem;border-radius:12px;font-weight:800}.site-header nav a:hover,.site-header nav a:focus-visible,.site-header nav a.active{background:#ffffff12;outline:none}.site-header nav a.active{box-shadow:inset 0 -3px var(--orange)}.menu-toggle{display:none}.accessibility-btn,.menu-toggle{border:1px solid #ffffff55;background:#ffffff10;color:#fff;border-radius:12px;padding:.68rem .85rem;font-weight:800}.accessibility-panel{position:fixed;z-index:90;right:1rem;top:5rem;background:white;border:1px solid #d7deea;border-radius:18px;padding:1rem;box-shadow:0 20px 50px #00122d38;width:min(300px,calc(100vw - 2rem))}.accessibility-panel h2{font-size:1.1rem;margin:.1rem 0 .65rem}.accessibility-panel button{display:block;width:100%;margin:.35rem 0;padding:.72rem;border:0;border-radius:10px;background:#eef3fb;font-weight:800;color:#0d2f63;text-align:left}

.hero{min-height:690px;padding:6.2rem 7vw 1.5rem;display:grid;grid-template-columns:1.05fr .95fr;grid-template-rows:1fr auto;align-items:center;gap:2.2rem;color:#fff;overflow:hidden;position:relative;background:linear-gradient(110deg,#020817 0%,#071b45 55%,#0f4770 100%);isolation:isolate}.space-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:-3}.nebula{position:absolute;inset:-10%;z-index:-2;background:radial-gradient(circle at 13% 16%,rgba(140,72,255,.24),transparent 18%),radial-gradient(circle at 31% 30%,rgba(43,132,255,.15),transparent 24%),radial-gradient(circle at 82% 58%,rgba(255,153,52,.13),transparent 22%);filter:blur(8px);pointer-events:none}.hero-copy{position:relative;z-index:2;align-self:center;max-width:760px}.eyebrow{text-transform:uppercase;letter-spacing:.09em;font-size:.78rem;font-weight:900;color:#657493}.hero .eyebrow,.space-feature .eyebrow{color:#ffbe70}.hero h1{font-size:clamp(3.1rem,6.4vw,6.1rem);line-height:.94;margin:.3rem 0 1rem;letter-spacing:-.055em;text-wrap:balance}.hero-intro{font-size:clamp(1.05rem,2vw,1.28rem);max-width:680px;color:#eef4ff}.hero-actions,.space-actions{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.7rem}.primary,.secondary,.ghost{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:.9rem 1.3rem;font-weight:900;text-decoration:none;cursor:pointer}.primary{background:var(--orange);color:#fff;border:0;box-shadow:0 8px 22px #ff8c2440}.secondary{background:#fff;color:var(--navy);border:0}.ghost{background:#ffffff12;color:#fff;border:1px solid #ffffff66}.hero-visual{position:relative;z-index:2;min-height:340px;display:flex;align-items:flex-start;justify-content:center}.hero-visual img{width:min(100%,560px);height:auto;filter:drop-shadow(0 34px 60px rgba(0,0,0,.42)) drop-shadow(0 0 26px rgba(74,186,255,.34));transform:translateY(-8px) rotate(-2deg)}.hero-visual:after{content:"";position:absolute;right:2%;top:37%;width:150px;height:62px;background:linear-gradient(90deg,rgba(98,212,255,.72),rgba(98,212,255,.08));filter:blur(14px);border-radius:999px;z-index:-1}.orbit{position:absolute;border:1px solid #7fd3ff55;border-radius:50%;pointer-events:none}.orbit-a{width:470px;height:160px;transform:rotate(14deg)}.orbit-b{width:360px;height:110px;transform:rotate(-18deg);border-color:#ffc56f55}.hero-timeline{grid-column:1/-1;background:linear-gradient(180deg,transparent,rgba(2,8,23,.28) 15%,rgba(2,8,23,.93) 56%,#020817 100%);margin:0 -7vw -1.5rem;padding:1.1rem 7vw 1.65rem;position:relative;z-index:3;overflow:hidden}.timeline-curve{position:absolute;left:7vw;right:7vw;top:.1rem;width:calc(100% - 14vw);height:128px;pointer-events:none}.timeline-curve-glow,.timeline-curve-line{fill:none;stroke-linecap:round}.timeline-curve-glow{stroke:url(#wzTimelineGradient);stroke-width:22;opacity:.38;filter:url(#wzGlow)}.timeline-curve-line{stroke:url(#wzTimelineGradient);stroke-width:6}.hero-eras{position:relative;z-index:2;display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:.2rem;align-items:end;padding-top:2.45rem}.hero-era{color:#fff;text-decoration:none;display:block;text-align:center;border-radius:16px;position:relative;padding:.2rem}.hero-era:hover,.hero-era:focus-visible{background:#ffffff10;outline:none}.era-marker{width:68px;height:68px;margin:0 auto -17px;display:grid;place-items:center;border-radius:50%;background:#0a1737;border:4px solid currentColor;box-shadow:0 0 0 6px rgba(255,255,255,.08),0 0 22px currentColor;font-size:1.65rem;position:relative;z-index:3}.era-card{min-height:176px;border-radius:0 0 18px 18px;padding:1.05rem .6rem .9rem;display:flex;flex-direction:column;justify-content:flex-end;background-size:cover;background-position:center;box-shadow:inset 0 -80px 120px rgba(2,8,23,.9), inset 0 32px 40px rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);position:relative;overflow:hidden}.era-card strong,.era-card small{display:block;text-shadow:0 3px 10px rgba(0,0,0,.55)}.era-card strong{font-size:1.05rem;font-weight:900;line-height:1.08}.era-card small{font-size:.72rem;color:#e6f0ff;margin-top:.28rem;line-height:1.3}.era-urknall{color:#b76cff}.era-dinosaurier{color:#ff8a2d}.era-steinzeit{color:#ffc949}.era-aegypten{color:#6bd85b}.era-mittelalter{color:#5eb8ff}.era-raumfahrt{color:#7f63ff}.era-heute{color:#43d4c2}.era-urknall .era-card{background-image:linear-gradient(180deg,rgba(5,10,26,.08),rgba(5,10,26,.15)),radial-gradient(circle at 12% 58%,rgba(255,173,70,.95),rgba(255,133,0,.12) 16%,transparent 22%),radial-gradient(circle at 70% 22%,rgba(162,105,255,.36),transparent 26%),radial-gradient(circle at 18% 26%,rgba(255,255,255,.14),transparent 2%),linear-gradient(135deg,#1b1440 0%,#172b6c 36%,#0a1031 100%)}.era-dinosaurier .era-card{background-image:linear-gradient(180deg,rgba(0,0,0,.08),rgba(0,0,0,.14)),url('assets/dinosaurier-card.jpg')}.era-steinzeit .era-card{background-image:linear-gradient(180deg,rgba(0,0,0,.08),rgba(0,0,0,.12)),url('assets/steinzeit-card.jpg')}.era-aegypten .era-card{background-image:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.12)),radial-gradient(circle at 75% 22%,rgba(255,247,171,.42),transparent 18%),linear-gradient(180deg,#e4c98c 0%,#d8bb77 44%,#af8c49 100%)}.era-mittelalter .era-card{background-image:linear-gradient(180deg,rgba(0,0,0,.06),rgba(0,0,0,.18)),linear-gradient(180deg,#8bc6ff 0%,#4767b7 54%,#283152 100%)}.era-raumfahrt .era-card{background-image:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.16)),linear-gradient(180deg,#5c8cff 0%,#2f4c93 48%,#0f1934 100%)}.era-heute .era-card{background-image:linear-gradient(180deg,rgba(0,0,0,.03),rgba(0,0,0,.18)),linear-gradient(180deg,#9dd8ff 0%,#60a7d1 40%,#365d7d 100%)}.era-aegypten .era-card::before,.era-mittelalter .era-card::before,.era-raumfahrt .era-card::before,.era-heute .era-card::before{content:"";display:block;position:absolute;inset:auto .8rem 2.95rem .8rem;height:58px;opacity:.95;pointer-events:none}.era-aegypten .era-card::before{background:linear-gradient(transparent 48%,rgba(124,78,24,.55) 48%,rgba(124,78,24,.55) 52%,transparent 52%),conic-gradient(from 45deg at 28% 100%,transparent 0 25%,rgba(198,150,71,.95) 0 50%,transparent 0) left bottom/42% 90% no-repeat,conic-gradient(from 45deg at 70% 100%,transparent 0 25%,rgba(215,168,83,.94) 0 50%,transparent 0) right bottom/46% 100% no-repeat}.era-mittelalter .era-card::before{background:radial-gradient(circle at 24% 42%,rgba(255,232,163,.25),transparent 16%),linear-gradient(transparent 55%,rgba(17,24,47,.7) 55%),linear-gradient(90deg,transparent 10%,rgba(190,206,255,.92) 10% 18%,transparent 18% 24%,rgba(190,206,255,.92) 24% 32%,transparent 32% 41%,rgba(190,206,255,.92) 41% 49%,transparent 49% 60%,rgba(190,206,255,.92) 60% 68%,transparent 68%)}.era-raumfahrt .era-card::before{background:radial-gradient(circle at 68% 16%,rgba(255,255,255,.55),transparent 12%),linear-gradient(transparent 52%,rgba(14,22,52,.74) 52%),conic-gradient(from 180deg at 50% 100%,transparent 0 130deg,rgba(255,255,255,.9) 0 230deg,transparent 0) center 72%/24px 46px no-repeat,linear-gradient(90deg,transparent 43%,rgba(255,255,255,.86) 43% 57%,transparent 57%) center 58%/6px 52px no-repeat,linear-gradient(180deg,rgba(255,155,64,.95),rgba(255,212,110,.0)) center calc(100% - 6px)/20px 34px no-repeat}.era-heute .era-card::before{background:linear-gradient(transparent 48%,rgba(35,86,110,.7) 48%),linear-gradient(90deg,transparent 8%,rgba(231,241,255,.95) 8% 14%,transparent 14% 18%,rgba(184,214,255,.95) 18% 22%,transparent 22% 29%,rgba(231,241,255,.95) 29% 37%,transparent 37% 44%,rgba(184,214,255,.95) 44% 51%,transparent 51% 62%,rgba(231,241,255,.95) 62% 70%,transparent 70%)}

.timeline-section,.topics,.fact-quiz,.accessibility-info{padding:5rem 7vw}.section-head{display:flex;justify-content:space-between;gap:2rem;align-items:end;margin-bottom:2rem}.section-head h2,.fact-box h2,.quiz-box h2,.accessibility-info h2,.space-feature h2{font-size:clamp(2rem,4vw,3.6rem);line-height:1;margin:.25rem 0}.section-head>p{max-width:520px;color:var(--muted)}.timeline{position:relative;display:grid;grid-template-columns:repeat(7,1fr);gap:1rem;padding:2rem 0 1rem}.timeline:before{content:"";position:absolute;left:3%;right:3%;top:5.1rem;height:6px;border-radius:999px;background:linear-gradient(90deg,#965ad9,#ef7c33,#d4b13b,#58a562,#438bc2,#8062db,#3fa38d)}.era{position:relative;z-index:2;border:0;background:transparent;padding:0;color:var(--ink);cursor:pointer}.era span{width:78px;height:78px;border-radius:50%;display:grid;place-items:center;margin:0 auto 1rem;background:white;border:5px solid #d8e0ee;font-size:2rem;box-shadow:0 10px 24px #00122d1c;transition:.2s ease}.era:hover span,.era:focus-visible span{transform:translateY(-6px);box-shadow:0 14px 30px #00122d31}.era:focus-visible{outline:3px solid #111;outline-offset:6px;border-radius:12px}.era strong,.era small{display:block;text-align:center}.era small{font-size:.75rem;color:var(--muted)}.era-popup{max-width:430px;margin:2rem auto 0;background:white;border-radius:20px;padding:1.4rem 1.5rem;box-shadow:0 20px 45px #00122d28;border:2px solid var(--popup-color,#5f7db5);position:relative}.era-popup h3{font-size:1.6rem;margin:0 0 .4rem}.popup-close{position:absolute;right:.7rem;top:.55rem;border:0;background:#eef3fb;width:34px;height:34px;border-radius:50%;font-size:1.3rem}.popup-link{font-weight:800;color:var(--blue)}

.topics{background:var(--cream)}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}.topic-card{background:white;border-radius:22px;overflow:hidden;box-shadow:0 12px 30px #1b2c4d14;transition:transform .2s ease,box-shadow .2s ease}.topic-card:hover{transform:translateY(-5px);box-shadow:0 18px 40px #1b2c4d22}.topic-image{width:100%;height:210px;display:block;object-fit:cover}.topic-card>div{padding:1.3rem}.topic-card h3{font-size:1.45rem;margin:.1rem 0 .5rem}.topic-card p{color:var(--muted)}.topic-card a{font-weight:900;color:var(--blue)}

.space-feature{position:relative;min-height:600px;padding:6rem 7vw;color:#fff;overflow:hidden;background:#020817;display:grid;grid-template-columns:1.1fr .9fr;align-items:end;gap:2rem;isolation:isolate}.deep-space-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:-2}.space-feature:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(2,8,23,.88) 0%,rgba(2,8,23,.55) 45%,rgba(2,8,23,.15) 100%);z-index:-1}.space-feature-copy{max-width:720px}.space-feature-copy p{font-size:1.1rem;color:#dfeaff}.space-facts{display:grid;gap:.8rem}.space-facts article{background:#081a3bcc;border:1px solid #ffffff26;border-radius:18px;padding:1rem 1.1rem;backdrop-filter:blur(10px)}.space-facts strong{display:block;font-size:2rem;color:#ffbd65}.space-facts span{color:#dbe8fa}

.fact-quiz{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem}.fact-box,.quiz-box{background:#fff;border-radius:24px;padding:2rem;box-shadow:0 12px 30px #1b2c4d14}.answers{display:grid;grid-template-columns:repeat(4,1fr);gap:.6rem;margin-top:1.2rem}.answers button{padding:1rem;border-radius:12px;border:2px solid #dbe4f2;background:#fff;font-weight:900;font-size:1.05rem}.answers button:hover,.answers button:focus-visible{border-color:var(--blue);outline:none}.accessibility-info{text-align:center;background:#eaf3ff}.accessibility-info p{max-width:760px;margin:auto;color:var(--muted)}footer{display:flex;justify-content:space-between;gap:2rem;align-items:center;padding:2rem 7vw;background:#07152f;color:white}footer nav{display:flex;gap:1rem;flex-wrap:wrap}footer a{color:#d8e4fb}

:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.big-text{font-size:118%}.high-contrast{--navy:#000;--navy2:#000;--cream:#fff;--ink:#000;--muted:#171717;background:#fff}.high-contrast *{box-shadow:none!important}.high-contrast .hero,.high-contrast .space-feature{background:#000}.reduce-motion *,@media(prefers-reduced-motion:reduce){animation:none!important;transition:none!important;scroll-behavior:auto!important}.reduce-motion .space-canvas,.reduce-motion .deep-space-canvas{opacity:.9}

@media(max-width:1040px){.site-header{flex-wrap:wrap}.menu-toggle{display:inline-block;margin-left:auto}.site-header nav{display:none;order:3;width:100%;flex-direction:column;align-items:stretch}.site-header nav.open{display:flex}.accessibility-btn{margin-left:auto}.hero{grid-template-columns:1fr;padding-top:4.6rem;min-height:auto}.hero-visual{min-height:260px}.hero-eras{grid-template-columns:repeat(4,1fr);row-gap:1rem}.timeline-curve{height:116px}.timeline{grid-template-columns:repeat(2,1fr)}.timeline:before{display:none}.topic-grid,.fact-quiz,.space-feature{grid-template-columns:1fr}.section-head{align-items:start;flex-direction:column}.era span{width:68px;height:68px}footer{flex-direction:column;align-items:flex-start}.space-feature{min-height:680px;align-items:end}.space-facts{grid-template-columns:repeat(3,1fr)}}
@media(max-width:640px){.site-header{padding:.8rem 1rem}.brand-copy strong{font-size:1.3rem}.brand-copy small{display:none}.accessibility-btn{font-size:.78rem}.hero,.timeline-section,.topics,.fact-quiz,.accessibility-info,.space-feature{padding-left:1.2rem;padding-right:1.2rem}.hero{padding-top:4rem}.hero h1{font-size:3.25rem}.hero-actions,.space-actions{align-items:stretch;flex-direction:column}.primary,.secondary,.ghost{width:100%}.hero-visual{min-height:190px}.hero-visual img{width:min(100%,430px)}.hero-timeline{margin-left:-1.2rem;margin-right:-1.2rem;padding-left:1.2rem;padding-right:1.2rem}.timeline-curve{left:1.2rem;right:1.2rem;width:calc(100% - 2.4rem);top:.3rem;height:104px}.hero-eras{grid-template-columns:repeat(2,1fr);padding-top:2rem}.era-marker{width:58px;height:58px;font-size:1.35rem}.era-card{min-height:146px;padding:.95rem .55rem .8rem}.era-card strong{font-size:.98rem}.timeline{grid-template-columns:1fr}.topic-image{height:175px}.answers{grid-template-columns:repeat(2,1fr)}.space-facts{grid-template-columns:1fr}.section-head h2,.space-feature h2{font-size:2.35rem}}