:root{--bg:#071421;--mint:#6ee5cd;--gold:#ffd18c;--text:#f5f7fa;--muted:#aac0d0}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 12% 35%,#14404a66,transparent 48%),radial-gradient(ellipse at 85% 80%,#34294b66,transparent 45%),var(--bg);color:var(--text);font-family:"Geeza Pro","Tahoma",sans-serif;min-height:100vh}body:before{content:"";position:fixed;inset:0;z-index:-1;background-image:radial-gradient(#ffffff44 1px,transparent 1px);background-size:61px 61px}button,a{touch-action:manipulation}button{cursor:pointer;border:1px solid #ffffff25;border-radius:12px;padding:11px 17px;background:#ffffff08;color:inherit;font:inherit}button:hover{background:#6ee5cd25;border-color:var(--mint)}button:focus-visible,a:focus-visible{outline:3px solid var(--gold);outline-offset:4px}.primary{background:var(--mint);color:#08202b;border:0;font-weight:bold}a{color:var(--mint)}header{height:88px;display:flex;align-items:center;justify-content:space-between;padding:0 5vw;border-bottom:1px solid #ffffff15}.brand{text-decoration:none;font-size:21px;font-weight:bold;color:white}.brand span{color:var(--mint);font-size:14px;margin-right:10px}.tools{display:flex;gap:9px;font-size:13px}#timerBtn{font-variant-numeric:tabular-nums;min-width:100px;direction:ltr}main{min-height:calc(100vh - 190px)}.slide{display:none;padding:35px 7vw 26px;animation:enter .3s ease}.slide.active{display:flex;flex-direction:column;justify-content:center;min-height:calc(100vh - 190px)}@keyframes enter{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}.eyebrow{color:var(--mint);font-size:14px;font-weight:bold;letter-spacing:1px;margin-bottom:16px}.split{display:grid;grid-template-columns:1.12fr 1fr;align-items:center;gap:45px}h1{font-size:clamp(55px,7.5vw,105px);line-height:1.18;margin:12px 0 24px;letter-spacing:-3px}h1 em{font-style:normal;color:var(--gold)}h2{font-size:clamp(28px,3.7vw,49px);line-height:1.4;margin:0 0 22px}h3{font-size:23px;margin:12px 0}p{line-height:1.85;font-size:22px;color:var(--muted);margin:12px 0}.lead{font-size:26px;max-width:740px}.pill{display:inline-block;border:1px solid #ffffff25;padding:8px 15px;border-radius:30px;color:var(--gold);font-size:15px;margin:10px 0}.question{border-right:3px solid var(--gold);padding:10px 20px;margin:23px 0;color:var(--gold);font-size:22px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:20px}.card{border:1px solid #ffffff20;background:linear-gradient(130deg,#ffffff09,#ffffff02);border-radius:22px;padding:25px}.card p{font-size:19px}.icon{font-size:35px;color:var(--mint)}.bigyear{font-size:76px;color:var(--gold);font-weight:bold;direction:ltr;text-align:right}.visual{min-height:290px;display:flex;justify-content:center;align-items:center}.rocket{width:100%;max-width:470px;filter:drop-shadow(0 0 35px #6ee5cd22)}.earth{width:280px;height:280px;border-radius:50%;background:radial-gradient(circle at 34% 25%,#84e6ce 0,#286b79 22%,#173953 55%,#061c32 77%);box-shadow:-15px -10px 45px #75eaff33,inset -50px -20px 60px #0008;position:relative}.earth:after{content:"";position:absolute;inset:-38px;border:1px solid #6ee5cd45;border-radius:50%;transform:rotate(-25deg) scaleY(.32)}.steps{display:flex;gap:12px;margin:20px 0}.step{flex:1;text-align:center;border-top:2px solid var(--mint);padding:20px 12px}.step b{display:block;color:var(--gold);font-size:38px}.step p{font-size:18px}.play{display:inline-flex;gap:10px;align-items:center;margin-top:14px}.videoHint{font-size:14px}.studentGrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.student{padding:0;overflow:hidden;text-align:right;background:#122435;border-radius:18px}.student img{width:100%;height:230px;object-fit:contain;background:#050d15}.student .caption{padding:12px}.student h3{font-size:19px}.student p{font-size:14px;margin:0}.student small{color:var(--gold);display:block;line-height:1.6;margin-top:7px}.quiz{display:grid;gap:14px;max-width:850px}.quiz button{text-align:right;font-size:22px;padding:22px}.quiz .correct{border-color:var(--mint);background:#6ee5cd25}.quiz .wrong{border-color:#fc958a}#feedback{min-height:40px;color:var(--gold)}footer{display:flex;align-items:center;justify-content:space-between;padding:17px 5vw;border-top:1px solid #ffffff15;gap:12px}footer span{display:block;font-size:13px;color:var(--muted);margin:5px}#dots{display:flex;gap:8px}#dots button{width:9px;height:9px;padding:0;border-radius:50%;background:#ffffff25}#dots button.selected{background:var(--gold);transform:scale(1.4)}.navbuttons{display:flex;gap:10px}.progress{height:3px;background:#ffffff10}.progress div{height:100%;background:var(--mint);transition:width .3s}aside{position:fixed;z-index:5;left:0;top:0;bottom:0;width:min(470px,100vw);background:#102736;padding:30px;overflow:auto;box-shadow:0 0 0 100vw #0005}aside p{font-size:18px}aside h2{font-size:29px;margin-top:40px}.close{float:left;margin-bottom:15px}dialog{width:min(1000px,94vw);max-height:92vh;overflow:auto;background:#0e2433;color:white;border:1px solid #6ee5cd55;border-radius:22px;padding:24px}dialog::backdrop{background:#020914df}dialog h2{font-size:26px;clear:both}dialog video{width:100%;max-height:65vh;background:black}dialog img{display:block;max-width:100%;max-height:66vh;object-fit:contain;margin:auto}#videoList{display:grid;grid-template-columns:1fr 1fr;gap:14px}#videoList button{text-align:right}details{margin-top:30px;line-height:2}details p{font-size:15px}#motion{height:230px;display:flex;justify-content:center;align-items:center;gap:30px;font-size:65px}#motion.launch .miniRocket{animation:launch 1.5s ease forwards}.miniRocket{transition:transform .5s}@keyframes launch{to{transform:translateY(-130px)}}.reveal{color:var(--mint);font-size:24px;min-height:45px}.closing{text-align:center}.closing h2{font-size:60px}.closing p{max-width:820px;margin:20px auto}@media(max-width:900px){header{height:auto;min-height:90px;padding:18px 5vw;gap:15px;flex-wrap:wrap}.tools{flex-wrap:wrap}.split{grid-template-columns:1fr;gap:20px}.visual{min-height:200px}.rocket{max-width:260px}.cards{grid-template-columns:1fr}.studentGrid{grid-template-columns:1fr 1fr}.slide.active{min-height:600px}.earth{height:190px;width:190px}footer{flex-wrap:wrap}#dots{order:3;width:100%;justify-content:center}.lead,p{font-size:20px}h1{font-size:65px}.student img{height:190px}#videoList{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* Readability and school identification */
p{font-size:24px}.lead{font-size:28px}.card p{font-size:21px}.question{font-size:24px}.eyebrow{font-size:16px}.student p{font-size:16px}.student small{font-size:15px}.videoHint{font-size:16px}.tools{font-size:15px}footer span{font-size:15px}.school-info{font-size:20px;line-height:1.6;color:var(--muted);margin-bottom:18px}.school-info strong{color:white}.team-info{font-size:18px;line-height:1.8;color:var(--muted);margin-top:12px}.team-info strong{color:var(--mint)}#slide-0 h1{font-size:clamp(52px,6.5vw,90px);margin:8px 0 16px}#slide-0 .question{margin:16px 0}#slide-0{padding-top:24px;padding-bottom:24px}@media(max-width:900px){p{font-size:22px}.lead{font-size:24px}.school-info{font-size:19px}.team-info{font-size:18px}}

/* Centered typography and renewed palette */
:root{--bg:#11132f;--mint:#b5b8ff;--gold:#ffda91;--muted:#d3d7ed;--text:#fffdf9}
body{background:radial-gradient(ellipse at 12% 30%,#4542a966,transparent 50%),radial-gradient(ellipse at 86% 75%,#254e8566,transparent 48%),var(--bg);font-family:"Geeza Pro","Tahoma",sans-serif}
.slide{text-align:center}.split{grid-template-columns:1.15fr .85fr;gap:30px}.lead{margin-left:auto;margin-right:auto;font-size:30px}p{font-size:26px;line-height:1.9}h2{font-size:clamp(33px,4vw,54px)}h3{font-size:26px}.eyebrow{font-size:18px}.question{border-right:0;border-bottom:2px solid var(--gold);padding:12px 15px;max-width:850px;margin:22px auto;font-size:26px}.card{background:linear-gradient(135deg,#b5b8ff16,#699dea08)}.card p{font-size:23px}.bigyear{text-align:center}.student{text-align:center;background:#212546}.student p{font-size:18px}.student small{font-size:16px}.quiz{margin:0 auto;width:100%}.quiz button{text-align:center;font-size:26px}.school-info{font-size:23px;line-height:1.65;margin-bottom:14px}.team-info{font-size:23px;line-height:1.8;margin-top:15px}.team-info span{display:block;color:var(--text)}.team-info strong{font-size:22px}.primary{background:#b5b8ff;color:#151633}button:hover{background:#b5b8ff25;border-color:#b5b8ff}.pill{font-size:18px}.studentGrid{gap:16px}aside{text-align:center;background:#222747}dialog{background:#1b2040}#videoList button{text-align:center}#timerBtn{margin:12px auto}#slide-0 h1{font-size:clamp(52px,5.7vw,78px);line-height:1.13;margin:8px 0 14px}#slide-0 .lead{font-size:27px}#slide-0 p:not(.lead){font-size:22px;margin:8px 0}#slide-0 .question{font-size:23px;margin:14px auto}#slide-0 .pill{margin:5px 0}#slide-0 .visual{align-self:center}#duration{font-size:18px}@media(max-width:900px){.split{grid-template-columns:1fr}p{font-size:24px}.lead{font-size:27px}.team-info{font-size:23px}.school-info{font-size:22px}.quiz button{font-size:24px}}


/* Original space colors, with persistent navigation and larger media */
:root{--bg:#071421;--mint:#6ee5cd;--gold:#ffd18c;--text:#f5f7fa;--muted:#aac0d0}
body{background:radial-gradient(ellipse at 12% 35%,#14404a66,transparent 48%),radial-gradient(ellipse at 85% 80%,#34294b66,transparent 45%),var(--bg);padding-bottom:100px}
body:before{background-image:radial-gradient(#ffffff44 1px,transparent 1px);background-size:61px 61px}
header{background:#071421bb;border-color:#ffffff15}.brand{color:white}.brand span{color:var(--mint)}button{background:#ffffff08;color:var(--text);border-color:#ffffff25}button:hover{background:#6ee5cd25;border-color:var(--mint)}.primary{background:var(--mint);color:#08202b}.primary:hover{background:#95f0dd;color:#08202b}
footer{position:fixed;bottom:0;left:0;right:0;z-index:4;min-height:80px;background:#091827f5;border-top:1px solid #ffffff20;padding:14px 4vw}footer span{color:var(--muted)}.progress{position:fixed;bottom:0;left:0;right:0;z-index:6}.progress div{background:var(--mint)}#dots button{background:#ffffff25}#dots button.selected{background:var(--gold)}
.card{background:linear-gradient(130deg,#ffffff09,#ffffff02);border-color:#ffffff20}.eyebrow,.icon,.reveal,.team-info strong{color:var(--mint)}.pill{background:#ffffff04;border-color:#ffffff25;color:var(--gold)}.question{color:var(--gold);border-color:var(--gold)}.team-info span{color:var(--text)}.student{background:#122435}.student img{background:#050d15}.student small{color:var(--gold)}.bigyear,.step b{color:var(--gold)}.step{border-color:var(--mint)}.quiz .correct{background:#6ee5cd25;border-color:var(--mint)}.quiz .wrong{background:#fc958a18;border-color:#fc958a}#feedback{color:var(--gold)}aside{background:#102736}dialog{background:#0e2433;color:var(--text)}dialog::backdrop{background:#020914df}#mediaModal{width:min(1420px,97vw);max-height:96vh;padding:18px}#mediaModal video{max-height:78vh}#mediaModal img{max-height:76vh}
.staff{display:flex;justify-content:center;gap:35px;flex-wrap:wrap;margin:25px auto}.staff p{margin:0!important;font-size:25px!important;line-height:1.7}.staff span,.staff strong{display:block}.staff span{font-size:21px;color:var(--mint)}.staff strong{font-size:29px;color:var(--text)}.closing h2{font-size:52px}.closing h2 span{color:var(--gold)!important}
#slide-0 h1.event-title{font-size:clamp(30px,3.3vw,46px);line-height:1.5;letter-spacing:0;margin:10px 0 14px}#slide-0 .team-info{font-size:23px;line-height:1.7}.previous-theme{margin:22px auto;padding:20px 25px;max-width:1050px;border:1px solid #6ee5cd40;border-radius:18px;background:#6ee5cd08}.previous-theme strong{font-size:25px;color:var(--gold)}.previous-theme p{font-size:22px;line-height:1.8}.previous-theme span{color:var(--mint);font-size:20px}.space-history{display:grid;grid-template-columns:1fr 1fr;gap:25px;margin:22px auto 0;max-width:1050px}.space-history p{font-size:21px;line-height:1.7;border-top:2px solid #6ee5cd40;padding-top:15px}.space-history strong{color:var(--gold)}.source-note{font-size:15px!important}
@media(max-width:900px){body{padding-bottom:132px}footer{min-height:112px;padding:10px 4vw}.navbuttons{margin-right:auto}.space-history{grid-template-columns:1fr}.staff{gap:18px}.staff strong{font-size:26px}.closing h2{font-size:40px}#slide-0 h1.event-title{font-size:32px}}@media(max-width:550px){footer>div:first-child{max-width:95px}.navbuttons button{padding:10px 12px}}

/* Reserve the measured navigation height at every zoom and viewport size. */
:root{--navigation-height:100px}
body{padding-bottom:calc(var(--navigation-height) + 32px)}
main{min-height:calc(100dvh - 88px - var(--navigation-height) - 32px)}
.slide.active{min-height:calc(100dvh - 88px - var(--navigation-height) - 32px)}
.slide{padding-bottom:40px}
html{scroll-padding-bottom:calc(var(--navigation-height) + 32px)}
footer{max-height:45dvh;overflow:auto}
@media(max-width:900px){body{padding-bottom:calc(var(--navigation-height) + 32px)}.slide.active{min-height:0}.slide{padding-bottom:40px}}

/* Separate content and navigation into non-overlapping screen rows. */
html{height:100%;overflow:hidden}
body{height:100dvh;min-height:0;padding:0!important;display:grid;grid-template-rows:auto minmax(0,1fr) auto 3px;overflow:hidden}
header{grid-row:1;height:auto;min-height:76px;padding-top:16px;padding-bottom:16px}
main{grid-row:2;min-height:0!important;overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;scroll-padding:24px}
.slide.active{min-height:100%!important;overflow:visible}
.slide{padding:28px 7vw 42px}
footer{grid-row:3;position:relative!important;inset:auto!important;min-height:76px;max-height:35dvh;overflow:auto;flex-shrink:0}
.progress{grid-row:4;position:relative!important;inset:auto!important;height:3px}
:root{--bg:#ecf3ff;--mint:#365ebd;--gold:#986012;--text:#1d3158;--muted:#435b7e}
body{background:radial-gradient(ellipse at 12% 28%,#bcecf3 0,transparent 55%),radial-gradient(ellipse at 88% 70%,#dfd4fc 0,transparent 55%),#eef3ff;color:var(--text)}
body:before{background-image:radial-gradient(#fff 1.5px,transparent 2px);background-size:57px 57px}
header{background:#ffffffbd;border-color:#bed0ea}.brand{color:#294475}.brand span{color:#435fa9}
button{background:#ffffffbc;color:#294475;border-color:#b7c8e5}button:hover{background:#e0e9ff;border-color:#6b83c3}.primary{background:#5d6bd2;color:white}.primary:hover{background:#4957b6;color:white}
footer{background:#f8faff;border-color:#bbceea}.progress div{background:#6573d4}#dots button{background:#b8c7e0}#dots button.selected{background:#6370ca}
.card{background:#ffffffc9;border-color:#c2d1ea}.eyebrow,.icon,.reveal,.team-info strong{color:#4164b1}.team-info span,.staff strong{color:#233f6b}.staff span{color:#5a5ca6}.pill{background:#fff1cb;color:#895919;border-color:#dec78b}.question{color:#865724;border-color:#d7b36c}.bigyear,.step b{color:#8160b6}.student{background:#ffffffdf;border-color:#bdcde7}.student img{background:#e2eafa}.student small{color:#85601f}.step{border-color:#7a8bc7}.quiz .correct{background:#d6f2e2;border-color:#43916b}.quiz .wrong{background:#ffe4e2;border-color:#cf7b70}#feedback{color:#815622}
aside{background:#f1f4ff;color:var(--text)}dialog{background:#f5f7ff;color:var(--text);border-color:#b9cbea}dialog::backdrop{background:#23375d88}.previous-theme{background:#ffffff80;border-color:#a8bee1}.previous-theme strong,.space-history strong{color:#5e5196}.previous-theme span{color:#4262a6}.space-history p{border-color:#acbce0}.closing h2 span{color:#7760ad!important}
@media(max-width:900px){header{min-height:76px}.slide.active{min-height:100%!important}.slide{padding-bottom:42px}footer{min-height:102px}}

/* Royal blue and turquoise space backdrop. */
:root{--bg:#194895;--mint:#96f1e0;--gold:#ffe1a0;--text:#ffffff;--muted:#e0eaff}
body{background:radial-gradient(ellipse at 8% 20%,#168baf 0,transparent 55%),radial-gradient(ellipse at 90% 75%,#6655b0 0,transparent 55%),linear-gradient(125deg,#2466b1,#284d9b 55%,#46549e);color:var(--text)}
header{background:#24488fda;border-color:#ffffff30}.brand,.brand span{color:white}footer{background:#284f99;border-color:#ffffff30}footer span{color:#e0eaff}
button{background:#ffffff14;color:white;border-color:#ffffff55}button:hover{background:#ffffff25;border-color:#b6ffed}.primary{background:#a1f0df;color:#143a68}.primary:hover{background:#c2fff0;color:#143a68}
.card{background:#ffffff13;border-color:#ffffff40}.eyebrow,.icon,.reveal,.team-info strong{color:#abf6e7}.team-info span,.staff strong{color:white}.staff span{color:#bdf6ed}.pill{background:#fff1cb18;color:#ffe1a0;border-color:#ffe1a070}.question{color:#ffe1a0;border-color:#ffe1a080}.bigyear,.step b{color:#ffe1a0}.step{border-color:#b7f3ea}.student{background:#315695;border-color:#ffffff55}.student small{color:#ffe6b8}#dots button{background:#ffffff60}#dots button.selected{background:#ffe1a0}.previous-theme{background:#ffffff12;border-color:#ffffff55}.previous-theme strong,.space-history strong{color:#ffe1a0}.previous-theme span{color:#bdf6ed}.space-history p{border-color:#ffffff55}.closing h2 span{color:#ffe1a0!important}#feedback{color:#ffe1a0}
aside,dialog{--text:#1d3158;--muted:#435b7e;--mint:#365ebd;color:#1d3158}aside button,dialog button{background:#e4ebfb;color:#294475;border-color:#b7c8e5}aside button:hover,dialog button:hover{background:#d6e2fa}aside a,dialog a{color:#365ebd}

/* Decorative star field and planets, behind the presentation content. */
body{isolation:isolate;background:radial-gradient(ellipse at 18% 22%,#257daf66,transparent 52%),radial-gradient(ellipse at 85% 70%,#7959c155,transparent 52%),linear-gradient(135deg,#143d79,#284d91 55%,#39497f)}
body:before{z-index:-2;background-image:radial-gradient(circle,#ffffffee 1px,transparent 1.8px),radial-gradient(circle,#b5eaffcc 1.4px,transparent 2px),radial-gradient(circle,#ffe4b3cc 1px,transparent 2px);background-size:71px 89px,139px 151px,223px 197px;background-position:11px 22px,49px 78px,110px 19px;opacity:.8}
.space-planets{position:fixed;inset:0;overflow:hidden;pointer-events:none;z-index:-1}
.space-planet{position:absolute;border-radius:50%;opacity:.5;box-shadow:inset -24px -12px 35px #15275288,0 0 45px #b0e8ff22}
.space-planet.blue{width:170px;height:170px;left:-42px;top:24%;background:radial-gradient(circle at 30% 25%,#b7f5ee,#43acc6 45%,#256696 80%)}
.space-planet.ringed{width:125px;height:125px;right:-25px;top:15%;background:repeating-linear-gradient(165deg,#e8c39e 0 12px,#cfa984 14px 24px,#ecd1b2 26px 34px)}
.space-planet.ringed:after{content:"";position:absolute;inset:-28px -63px;border:14px solid #e6d2bb99;border-radius:50%;transform:rotate(-24deg) scaleY(.35);box-shadow:0 0 0 5px #d8c4b438}
.space-planet.purple{width:95px;height:95px;left:12%;bottom:9%;background:radial-gradient(circle at 28% 25%,#d9b9f8,#9873ce 50%,#684e9c)}
.space-planet.small{width:38px;height:38px;right:17%;bottom:15%;background:radial-gradient(circle at 30% 25%,#ffe4b1,#dc9a75 55%,#a36860)}
.card,.student{backdrop-filter:blur(8px);background-color:#254b85c9}
@media(max-width:900px){.space-planet{opacity:.28}.space-planet.blue{width:120px;height:120px}.space-planet.ringed{width:90px;height:90px}}

/* Tiny star shapes with gentle twinkling, replacing the dotted field. */
body:before{background-image:none!important}
.space-stars{position:fixed;inset:0;pointer-events:none;z-index:-1;overflow:hidden}
.tiny-star{position:absolute;width:var(--star-size);height:var(--star-size);background:#edf8ff;clip-path:polygon(50% 0,61% 36%,100% 50%,61% 64%,50% 100%,39% 64%,0 50%,39% 36%);opacity:.4;animation:starTwinkle var(--star-duration) ease-in-out var(--star-delay) infinite}
@keyframes starTwinkle{0%,100%{opacity:.25;transform:scale(.85)}50%{opacity:.75;transform:scale(1.15)}}
.space-planets .space-planet.blue{background:radial-gradient(circle at 30% 25%,hsl(var(--planet-hue) 80% 82%),hsl(var(--planet-hue) 60% 55%) 45%,hsl(var(--planet-hue) 55% 30%) 80%)}
.space-planets .space-planet.ringed{background:repeating-linear-gradient(165deg,hsl(calc(var(--planet-hue) + 45) 60% 75%) 0 12px,hsl(calc(var(--planet-hue) + 45) 40% 58%) 14px 24px,hsl(calc(var(--planet-hue) + 45) 55% 80%) 26px 34px)}
.space-planets .space-planet.purple{background:radial-gradient(circle at 28% 25%,hsl(calc(var(--planet-hue) + 100) 65% 82%),hsl(calc(var(--planet-hue) + 100) 45% 59%) 50%,hsl(calc(var(--planet-hue) + 100) 45% 35%))}
.space-planets[data-variant="1"] .blue{width:205px;height:205px;top:36%;left:-65px}
.space-planets[data-variant="2"] .blue{background:repeating-linear-gradient(155deg,hsl(var(--planet-hue) 65% 72%) 0 15px,hsl(var(--planet-hue) 50% 43%) 17px 30px);top:18%}
.space-planets[data-variant="3"] .blue{width:145px;height:145px;top:52%;left:-35px}
.space-planets[data-variant="1"] .ringed:after,.space-planets[data-variant="3"] .ringed:after{opacity:0}
@media(prefers-reduced-motion:reduce){.tiny-star{animation:none;opacity:.5}}

/* Slightly deeper blue background. */
body{background:radial-gradient(ellipse at 18% 22%,#20699555,transparent 52%),radial-gradient(ellipse at 85% 70%,#654aa344,transparent 52%),linear-gradient(135deg,#103364,#203e78 55%,#303d6d)}

/* Deeper space backdrop and Newton's third-law explanation. */
body{background:radial-gradient(ellipse at 18% 22%,#18507344,transparent 52%),radial-gradient(ellipse at 85% 70%,#51398433,transparent 52%),linear-gradient(135deg,#0b2449,#172d5a 55%,#252f55)}
.newton-law{padding:16px 22px;border:1px solid #abf6e760;border-radius:18px;background:#96f1e00c;margin:18px 0}
.newton-law h3{color:var(--mint);margin:0 0 8px}.newton-law p{font-size:24px;color:var(--gold);margin:0;line-height:1.8}

/* Natural, irregular distant stars against a deeper night sky. */
body{background:radial-gradient(ellipse at 18% 22%,#16436528,transparent 52%),radial-gradient(ellipse at 85% 70%,#43307128,transparent 52%),linear-gradient(135deg,#07172f,#10203f 55%,#1b2340)}
.tiny-star{clip-path:none;border-radius:50%;background:var(--star-color);opacity:var(--star-opacity);box-shadow:0 0 3px var(--star-color);animation:naturalTwinkle var(--star-duration) ease-in-out var(--star-delay) infinite;transform:none}
.bright-star{box-shadow:0 0 4px var(--star-color),0 0 9px #d8eaff55}
.bright-star:before,.bright-star:after{content:"";position:absolute;left:50%;top:50%;background:var(--star-color);opacity:.3;transform:translate(-50%,-50%)}
.bright-star:before{width:1px;height:7px}.bright-star:after{width:7px;height:1px}
@keyframes naturalTwinkle{0%,100%{opacity:calc(var(--star-opacity)*.75)}50%{opacity:var(--star-opacity)}}
@media(prefers-reduced-motion:reduce){.tiny-star{animation:none;opacity:var(--star-opacity)}}

/* Black top and bottom navigation bars. */
header,footer{background:#000;border-color:#ffffff25}

.competition-link{color:var(--gold);border:1px solid #ffffff40;padding:10px 14px;border-radius:12px;text-decoration:none}

/* Compact touch layout: keep navigation visible without crowding the slide. */
@media(max-width:600px){
 header{display:block;min-height:0;padding:10px 14px 8px;padding-top:max(10px,env(safe-area-inset-top));}
 .brand{display:block;text-align:center;font-size:19px;line-height:1.4;margin-bottom:8px}.brand span{font-size:13px}
 .tools{flex-wrap:nowrap;overflow-x:auto;gap:8px;padding:2px 2px 6px;scrollbar-width:none}.tools::-webkit-scrollbar{display:none}
 .tools button,.tools a{flex:0 0 auto;white-space:nowrap;min-height:44px;padding:10px 12px;font-size:14px;display:inline-flex;align-items:center;justify-content:center}
 footer{min-height:0;max-height:none;display:grid;grid-template-columns:auto minmax(0,1fr);padding:10px 14px;padding-bottom:max(10px,env(safe-area-inset-bottom));gap:10px}footer span{font-size:13px;margin:0}#dots{display:none}.navbuttons{justify-content:flex-end;gap:8px}.navbuttons button{min-height:46px;padding:10px 14px;font-size:16px}
 .slide{padding:24px 18px 30px}.slide.active{justify-content:flex-start}.split{gap:20px;grid-template-columns:minmax(0,1fr)}.split>*{min-width:0}
 #slide-0 h1{font-size:clamp(32px,8.8vw,44px);line-height:1.45;letter-spacing:0}h1{font-size:40px;letter-spacing:0}h2{font-size:30px;line-height:1.55}h3{font-size:23px}p,.lead,#slide-0 .lead{font-size:22px;line-height:1.8}#slide-0 p:not(.lead){font-size:20px}.eyebrow{font-size:15px;line-height:1.7}.team-info,.team-info strong{font-size:22px}.question,#slide-0 .question{font-size:21px;padding:12px 0}.pill{font-size:16px;line-height:1.7}.cards,.studentGrid{grid-template-columns:minmax(0,1fr);gap:16px}.card{padding:20px}.card p{font-size:20px}.student img{height:240px}.student p{font-size:18px}.student small{font-size:16px}.steps{flex-direction:column}.step{padding:14px}.newton-law{padding:16px}.newton-law p{font-size:21px}.staff strong{font-size:25px!important}.staff span{font-size:20px!important}.closing h2{font-size:34px}.closing p{font-size:22px}.quiz button{font-size:21px;min-height:52px;padding:16px}.play{min-height:48px;justify-content:center;font-size:18px}.visual{min-height:180px}.rocket{max-width:230px}
 dialog{width:calc(100% - 20px);max-height:calc(100dvh - 24px);padding:16px;border-radius:16px}dialog h2{font-size:22px;line-height:1.6}dialog video{width:100%;max-height:70dvh}dialog .close,aside .close{min-height:44px;min-width:74px}aside{width:100%;padding:22px;max-height:100dvh}aside p{font-size:19px}.space-planet{opacity:.18!important}
}
@media(max-width:600px) and (max-height:500px){header .brand{display:none}footer{padding-top:6px;padding-bottom:6px}.slide{padding-top:18px}}
@media(max-width:600px){body{grid-template-columns:minmax(0,1fr)}header,main,footer{min-width:0;width:100%}.tools{min-width:0;max-width:100%}}