:root{--bg:#06101f;--panel:#0e1c33;--text:#f4f7fb;--muted:#a7b6ca;--line:#243a57;--cyan:#67d5f5;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.55}a{color:inherit;text-decoration:none}.shell{width:min(var(--max),calc(100% - 40px));margin:auto}.narrow{max-width:760px}.siteHeader{z-index:20;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#06101ff2;position:sticky;top:0}.headerInner{justify-content:space-between;align-items:center;height:82px;display:flex}.brand{align-items:center;gap:12px;font-size:21px;font-weight:800;display:flex}.brandMark{color:#fff;background:linear-gradient(135deg,#ff7d29,#ffc139);border-radius:13px;place-items:center;width:42px;height:42px;display:grid}.siteHeader nav{align-items:center;gap:30px;font-size:14px;font-weight:700;display:flex}.teacherLink{border:1px solid #758399;border-radius:999px;padding:11px 16px}.hero{background:radial-gradient(circle at 80% 30%,#16396d 0,#0b1b39 35%,#06101f 68%);padding:80px 0 62px}.heroGrid{grid-template-columns:1.5fr .7fr;align-items:center;gap:64px;display:grid}.hero h1,.projectHero h1{letter-spacing:-.055em;margin:14px 0 24px;font-size:clamp(54px,7vw,92px);line-height:.98}.hero h1 em{color:var(--cyan);font-style:normal}.lead{color:#bdc9d8;max-width:820px;font-size:20px}.eyebrow{letter-spacing:.18em;color:#90a5be;margin:0 0 12px;font-size:12px;font-weight:900}.cyan{color:var(--cyan)}.actions{gap:12px;margin-top:28px;display:flex}.button{border:1px solid #40526b;border-radius:999px;padding:13px 18px;font-weight:800;display:inline-block}.button.primary{color:#07101d;background:#f2f6fb;border-color:#f2f6fb}.heroPanel,.projectCard,.learningCard,.emptyState,.notice{border:1px solid var(--line);background:linear-gradient(#10213b,#0b182d);border-radius:26px}.heroPanel{text-align:center;color:var(--muted);padding:40px}.heroMonogram{color:#fff;background:linear-gradient(135deg,#ff7d29,#ffc139);border-radius:28px;place-items:center;width:110px;height:110px;margin:auto;font-size:52px;font-weight:900;display:grid}.interests{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.chips{flex-wrap:wrap;gap:12px;padding:18px 0;display:flex}.chips span,.meta span{border:1px solid var(--line);color:#d2dbe7;background:#0d1a2e;border-radius:999px;padding:8px 12px;font-size:13px;font-weight:700}.section{padding:78px 0;scroll-margin-top:128px}.section.alt{background:#081426}.section h2{letter-spacing:-.035em;margin:0 0 24px;font-size:clamp(36px,4vw,56px);line-height:1.05}.projectCard{grid-template-columns:1.5fr .55fr;gap:40px;padding:34px;display:grid}.projectCard h3{margin:10px 0 14px;font-size:42px}.meta{flex-wrap:wrap;gap:8px;margin-bottom:24px;display:flex}.projectVisual{border-left:1px solid var(--line);color:var(--muted);flex-direction:column;justify-content:center;gap:9px;padding-left:34px;display:flex}.orbitIcon{color:var(--cyan);font-size:72px}.muted{color:var(--muted)}.twoCol{grid-template-columns:1fr 1fr;gap:70px;display:grid}.footer{border-top:1px solid var(--line);color:var(--muted);padding:28px 0}.footer .shell{justify-content:space-between;display:flex}.projectHero{background:radial-gradient(circle at 85% 25%,#173e75 0,#0b1b39 36%,#06101f 70%);padding:50px 0 70px}.projectHero h1{margin-top:16px}.projectHeroInner{grid-template-columns:minmax(0,1.25fr) .55fr;align-items:center;gap:56px;display:grid}.back{color:#9cc6f4;margin-bottom:24px;font-weight:800;display:inline-block}.heroOrbit{min-height:290px;position:relative}.heroOrbit i{border:1px solid #385578;border-radius:50%;position:absolute;inset:50%;transform:translate(-50%,-50%)}.heroOrbit i:first-of-type{width:150px;height:72px}.heroOrbit i:nth-of-type(2){width:235px;height:112px}.heroOrbit i:nth-of-type(3){width:320px;height:154px}.heroSun{background:radial-gradient(circle at 35% 30%,#fff7a9,#ffb217 30%,#ff6d00 72%);border-radius:50%;width:72px;height:72px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 0 45px #ff7b2055}.heroOrbit:after{content:"";background:#67d5f5;border-radius:50%;width:16px;height:16px;position:absolute;top:calc(50% - 19px);left:calc(50% + 102px);box-shadow:-78px 60px 0 -2px #b64c2d,58px 52px 0 3px #d9bd79}.projectNav{z-index:15;border-top:1px solid var(--line);border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#081426f2;position:sticky;top:82px}.projectNavInner{white-space:nowrap;align-items:center;gap:18px;min-height:54px;display:flex;overflow-x:auto}.projectNavInner span{letter-spacing:.14em;text-transform:uppercase;color:#7389a5;font-size:11px;font-weight:900}.projectNavInner a{color:#c9d6e6;font-size:13px;font-weight:800}.projectNavInner a:hover{color:var(--cyan)}.sectionHeading{justify-content:space-between;align-items:end;gap:35px;margin-bottom:28px;display:flex}.sectionHeading>p{max-width:430px;color:var(--muted)}.factGrid{grid-template-columns:repeat(6,1fr);gap:12px;display:grid}.factGrid article{border:1px solid var(--line);background:#0c192c;border-radius:18px;min-height:130px;padding:24px 18px}.factGrid b{margin-bottom:8px;font-size:24px;display:block}.factGrid span{color:var(--muted)}.planetLayout{grid-template-columns:1.65fr .8fr;align-items:stretch;gap:22px;display:grid}.solarStrip{border:1px solid var(--line);background:radial-gradient(circle at 20%,#15233b 0,#06101f 42%);border-radius:28px;justify-content:center;align-items:center;gap:13px;min-height:370px;padding:34px;display:flex;overflow:auto}.sun{background:radial-gradient(circle at 35% 30%,#fff7a9,#ffb217 30%,#ff6d00 72%);border-radius:50%;flex:0 0 88px;width:88px;height:88px;box-shadow:0 0 35px #ff7b2066}.planetChoice{appearance:none;color:#d8e1ec;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:16px;flex-direction:column;align-items:center;gap:10px;min-width:62px;padding:13px 9px;display:flex;position:relative}.planetChoice:hover{background:#10233b;border-color:#284463}.planetChoice.active{background:#142943;border-color:#3b668f}.planetNumber{letter-spacing:.12em;color:#7188a3;font-size:10px}.planet{border-radius:50%;width:36px;height:36px;display:block;box-shadow:inset -8px -8px 14px #0003}.planet.large{width:76px;height:76px}.mercury{background:#8b8d91}.venus{background:linear-gradient(135deg,#edb45d,#b66d25)}.earth{background:linear-gradient(135deg,#2695e6 0 48%,#55bc52 49% 74%,#2087d3 75%)}.mars{background:#b64c2d}.jupiter{background:repeating-linear-gradient(#d2ad76 0 7px,#9e6749 8px 11px,#d8b98a 12px 17px)}.saturn{background:#d9bd79;box-shadow:0 0 0 4px #75634a}.uranus{background:#75d4db}.neptune{background:#3157b8}.learningCard{flex-direction:column;justify-content:center;padding:28px;display:flex}.cardTop{align-items:center;gap:20px;display:flex}.learningCard h3{margin:0;font-size:42px}.position{background:#142a46;border-radius:12px;padding:13px 15px;font-weight:800}.knowledge{border-top:1px solid var(--line);margin-top:20px;padding-top:18px}.knowledge p{color:var(--muted);margin-bottom:8px}.audioSlot{background:linear-gradient(#0c1b30,#0a1627);border:1px solid #2d4866;border-radius:18px;align-items:flex-start;gap:16px;margin-top:22px;padding:18px 20px;display:flex}.audioIcon{width:42px;height:42px;color:var(--cyan);background:#183252;border-radius:50%;flex:none;place-items:center;font-size:12px;display:grid}.audioCopy{flex-direction:column;gap:3px;display:flex}.audioCopy strong{font-size:16px}.audioCopy small{color:var(--muted);max-width:760px}.audioLabel{letter-spacing:.15em;color:#7894b3;font-size:10px;font-weight:900}.audioPending{color:#91a7bf;border:1px dashed #3b5876;border-radius:999px;align-self:flex-start;margin-top:9px;padding:7px 10px;font-size:12px;font-weight:800}.audioSlot audio{max-width:100%;margin-top:12px}.groupGrid,.conceptGrid,.learnedGrid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.groupGrid article,.conceptGrid article,.learnedGrid article{border:1px solid var(--line);background:#0c192c;border-radius:20px;padding:24px}.groupGrid h3,.conceptGrid h3{margin:9px 0}.groupCount{letter-spacing:.12em;text-transform:uppercase;color:#718aa7;font-size:11px;font-weight:900}.miniPlanets{gap:9px;margin-top:20px;display:flex}.miniPlanets i{border-radius:50%;width:28px;height:28px;display:block}.conceptGrid{grid-template-columns:repeat(4,1fr)}.conceptMark{min-width:48px;height:48px;color:var(--cyan);background:#122b48;border-radius:13px;justify-content:center;align-items:center;font-weight:900;display:inline-flex;font-size:20px!important}.conceptGrid p,.groupGrid p{color:var(--muted)}.splitSection{grid-template-columns:1.2fr .55fr;align-items:center;gap:50px;display:grid}.factList p{border-bottom:1px solid var(--line);padding:13px 0}.moonVisual{text-align:center;color:var(--muted)}.moon{background:radial-gradient(circle at 35% 30%,#eee,#a9acb3 48%,#666b74);border-radius:50%;width:170px;height:170px;margin:auto;box-shadow:inset -30px -20px 50px #0005}.learnedGrid{grid-template-columns:repeat(4,1fr)}.learnedGrid span{letter-spacing:.2em;color:var(--cyan);font-size:12px}.learningSection{border-top:1px solid #14243a;border-bottom:1px solid #14243a}.challenge{border:1px solid var(--line);background:linear-gradient(135deg,#0d1d35,#10294b);border-radius:28px;padding:38px}.quizGrid{grid-template-columns:repeat(5,1fr);gap:12px;display:grid}.quizCard{background:#0b1728;border:1px solid #213b59;border-radius:16px;flex-direction:column;min-height:220px;padding:18px;display:flex}.quizCard p{flex:1;margin:12px 0 20px;font-weight:800}.quizNumber{letter-spacing:.16em;color:#6f89a8;font-size:10px}.quizCard button{appearance:none;color:#d7e1ed;cursor:pointer;background:0 0;border:1px solid #375574;border-radius:999px;padding:8px 10px;font-weight:800}.quizCard button:hover{border-color:#67d5f5}.quizAnswer{color:var(--cyan);margin-top:14px;font-size:14px;display:block}.quizCard.open{background:#0d1e33;border-color:#3d668c}@media (max-width:1000px){.projectHeroInner{grid-template-columns:1fr}.heroOrbit{display:none}.factGrid,.quizGrid{grid-template-columns:repeat(3,1fr)}}@media (max-width:900px){.siteHeader nav{display:none}.projectNav{top:82px}.heroGrid,.projectCard,.twoCol,.planetLayout,.splitSection{grid-template-columns:1fr}.projectVisual{border-left:0;border-top:1px solid var(--line);padding:24px 0 0}.factGrid,.groupGrid,.conceptGrid,.learnedGrid{grid-template-columns:repeat(2,1fr)}.quizGrid{grid-template-columns:1fr 1fr}.solarStrip{justify-content:flex-start}.sectionHeading{display:block}.sectionHeading>p{max-width:none}.footer .shell{flex-direction:column;gap:10px}}@media (max-width:560px){.shell{width:min(var(--max),calc(100% - 24px))}.hero,.section{padding:54px 0}.hero h1,.projectHero h1{font-size:52px}.factGrid,.groupGrid,.conceptGrid,.learnedGrid,.quizGrid{grid-template-columns:1fr}.actions{flex-direction:column}.projectNavInner{gap:14px}.projectNavInner span{display:none}.challenge{padding:24px}.quizCard{min-height:180px}}
.solarHero{isolation:isolate;background:#030712;position:relative;overflow:hidden}.solarHero:before{content:"";z-index:-3;background-image:linear-gradient(90deg,#030712f2 0%,#030712c7 42%,#03071252 72%,#030712b3 100%),var(--hero-space);background-position:50%;background-size:cover;position:absolute;inset:0}.solarHero:after{content:"";z-index:-2;background:radial-gradient(circle at 78% 38%,#4476cc2e,#0000 34%),linear-gradient(#02061114,#020611bd);position:absolute;inset:0}.solarHero .projectHeroInner{min-height:470px}.heroCopy{z-index:2;position:relative}.heroPlanetLine{justify-content:center;align-self:stretch;align-items:center;min-height:360px;display:flex;position:relative}.heroSunPhoto{object-fit:cover;filter:saturate(1.08)contrast(1.05);border-radius:50%;width:180px;height:180px;position:absolute;top:50%;left:8%;transform:translateY(-50%);box-shadow:0 0 54px #ff811e3d}.heroPlanetRail{justify-content:space-between;align-items:center;gap:6px;display:flex;position:absolute;top:50%;left:34%;right:4%;transform:translateY(-50%)}.heroPlanetRail img{object-fit:cover;background:#02050b;border-radius:50%;width:36px;height:36px;box-shadow:0 0 0 1px #ffffff14,0 12px 32px #00000061}.heroPlanetRail img:nth-child(5){width:72px;height:72px}.heroPlanetRail img:nth-child(6){object-fit:contain;border-radius:38%;width:86px;height:52px}.heroPlanetRail img:nth-child(7),.heroPlanetRail img:nth-child(8){width:48px;height:48px}.imageCredit{letter-spacing:.12em;text-transform:uppercase;color:#d6e0ee8c;font-size:10px;position:absolute;bottom:14px;right:22px}.visualFacts{grid-template-columns:repeat(3,1fr)}.visualFact{isolation:isolate;position:relative;overflow:hidden;background:#000!important;border-color:#1f3551!important;min-height:250px!important;padding:0!important}.visualFact:before{content:"";z-index:-2;background-image:var(--fact-image);background-position:50% 36%;background-repeat:no-repeat;transition:transform .35s;position:absolute;inset:0}.visualFact:after{content:"";z-index:-1;background:linear-gradient(#0000 40%,#00000042 66%,#000000e6 100%);position:absolute;inset:0}.visualFact:hover:before{transform:scale(1.025)}.visualFact>div{padding:22px 24px;position:absolute;bottom:0;left:0;right:0}.visualFact b{text-shadow:0 2px 12px #000000e6;margin:0 0 2px!important;font-size:26px!important}.visualFact span{text-shadow:0 2px 10px #000000e6;font-size:15px;color:#d6dfeb!important}.visualFact:first-child:before{background-image:url(https://assets.science.nasa.gov/dynamicimage/assets/science/psd/photojournal/pia/pia26/pia26681/PIA26681.jpg?crop=faces%2Cfocalpoint&fit=clip&h=1600&w=1600);background-position:50% 32%;background-size:64%}.visualFact:nth-child(2){background:#02050b!important}.visualFact:nth-child(2):before{background-image:url(https://svs.gsfc.nasa.gov/vis/a000000/a005600/a005674/solar_system.Still004_preview.jpg);background-position:50%;background-size:cover}.visualFact:nth-child(3):before{background-position:50% 35%;background-size:108%}.visualFact:nth-child(4):before{background-image:url(https://assets.science.nasa.gov/dynamicimage/assets/science/missions/hubble/releases/1999/04/STScI-01EVTA4B0CT67AJW6WYMQRF0MY.tif?w=2000);background-position:50% 34%;background-size:72%;-webkit-mask-image:radial-gradient(circle at 50% 34%,#000 0 38%,#0000 38.5%);mask-image:radial-gradient(circle at 50% 34%,#000 0 38%,#0000 38.5%)}.visualFact:nth-child(5):before{background-position:50% 36%;background-size:108%}.visualFact:nth-child(6):before{background-position:50% 36%;background-size:112%}.photoPlanetLayout{grid-template-columns:minmax(0,1.55fr) minmax(320px,.8fr)}.photoSolarStrip{background:radial-gradient(circle at 15%,#ff811e1c,#0000 24%),linear-gradient(#050914,#07111f);gap:9px;min-height:430px}.sunPhoto{border-radius:50%;flex:0 0 104px;width:104px;height:104px;margin-right:8px;overflow:hidden;box-shadow:0 0 42px #ff7f1e38}.sunPhoto img,.planetPhoto img,.selectedPlanetMedia img{object-fit:cover;width:100%;height:100%;display:block}.planetChoice{min-width:72px;padding:12px 8px}.planetPhoto{background:#02050b;border-radius:50%;width:54px;height:54px;display:block;overflow:hidden;box-shadow:0 0 0 1px #ffffff12}.planetChoice:nth-of-type(6) .planetPhoto{width:72px;height:72px}.planetChoice:nth-of-type(7) .planetPhoto{border-radius:38%;width:82px;height:54px}.planetChoice:nth-of-type(8) .planetPhoto,.planetChoice:nth-of-type(9) .planetPhoto{width:62px;height:62px}.planetChoice.active .planetPhoto{box-shadow:0 0 0 2px #67d5f5,0 0 28px #67d5f529}.photoLearningCard{justify-content:flex-start;padding:0;overflow:hidden}.selectedPlanetMedia{border-bottom:1px solid var(--line);background:#02050b;height:260px}.selectedPlanetMedia img{object-fit:cover}.selectedPlanetCopy{padding:26px}.selectedPlanetCopy h3{margin:0 0 12px;font-size:44px}.photoLearningCard .position{margin-top:14px}.photoLearningCard .knowledge{margin-top:18px}@media (max-width:1000px){.solarHero .projectHeroInner{min-height:auto}.heroPlanetLine{min-height:260px}.heroSunPhoto{width:140px;height:140px;left:5%}.heroPlanetRail{left:26%;right:1%}.visualFacts{grid-template-columns:repeat(2,1fr)}.photoPlanetLayout{grid-template-columns:1fr}.selectedPlanetMedia{height:320px}}@media (max-width:700px){.solarHero .projectHeroInner{display:block}.heroPlanetLine{display:none}.solarHero:before{background-image:linear-gradient(180deg,#030712c2,#030712eb),var(--hero-space);background-position:50%}.visualFacts{grid-template-columns:1fr 1fr}.visualFact{min-height:210px!important}.photoSolarStrip{min-height:330px}.sunPhoto{flex-basis:82px;width:82px;height:82px}.planetPhoto{width:48px;height:48px}.planetChoice{min-width:64px}.selectedPlanetMedia{height:260px}}@media (max-width:520px){.visualFacts{grid-template-columns:1fr}.visualFact{min-height:230px!important}.imageCredit{display:none}.photoSolarStrip{padding:22px 16px}.selectedPlanetMedia{height:220px}.visualFact:first-child:before,.visualFact:nth-child(4):before{background-size:72%}.visualFact:nth-child(3):before,.visualFact:nth-child(5):before,.visualFact:nth-child(6):before{background-size:110%}.visualFact:nth-child(2):before{background-position:50%;background-size:cover}}