:root{
  --night:#0b1036; --night2:#151a4f; --plum:#2b2370; --cream:#fff6dc; --moon:#efe9d8;
  --sun:#ffcf4a; --coral:#ff8a5c; --mint:#7fe0c8; --ink:#1d1840; --muted:#c9c6ee;
  --radius:28px; --display:'Chillax','Nunito',system-ui,sans-serif; --body:'Nunito',system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--night);color:var(--cream);font-family:var(--body);font-size:clamp(18px,1.15vw + 12px,22px);line-height:1.55;overflow-x:hidden}
img{max-width:100%;display:block}
button{font:inherit;cursor:pointer}
a{color:var(--sun)}
#stars{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
main,header,footer{position:relative;z-index:1}

/* nav dots */
.dots{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:20;display:flex;flex-direction:column;gap:12px}
.dots a{width:14px;height:14px;border-radius:50%;background:rgba(255,246,220,.25);border:2px solid rgba(255,246,220,.5);transition:all .3s;position:relative}
.dots a.on{background:var(--sun);border-color:var(--sun);transform:scale(1.35);box-shadow:0 0 14px var(--sun)}
.dots a span{position:absolute;right:24px;top:50%;transform:translateY(-50%);white-space:nowrap;font-size:14px;font-weight:800;background:var(--plum);padding:3px 10px;border-radius:99px;opacity:0;pointer-events:none;transition:opacity .2s}
.dots a:hover span{opacity:1}

/* hero */
.hero{min-height:100svh;display:grid;place-items:center;position:relative;overflow:hidden}
.hero-3d{position:absolute;left:0;right:0;bottom:90px;top:clamp(170px,30vh,290px);cursor:grab}
.hero-3d:active{cursor:grabbing}
.hero-copy{position:absolute;top:9vh;left:0;right:0;text-align:center;pointer-events:none;padding:0 20px}
.kicker{font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--mint);font-size:.8em;margin:0 0 .3em}
h1{font-family:var(--display);font-weight:700;font-size:clamp(56px,10vw,140px);line-height:.95;margin:0;color:var(--cream);text-shadow:0 6px 0 var(--plum),0 0 40px rgba(255,207,74,.35)}
.wob{display:inline-block;animation:wob 3.2s ease-in-out infinite}
.wob.d2{animation-delay:.4s;color:var(--sun)}
@keyframes wob{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-10px) rotate(2deg)}}
.hint{position:absolute;left:0;right:0;bottom:-0;margin:0;font-weight:700;color:var(--muted);font-size:.9em}
.hero > .hint{bottom:78px;text-align:center;pointer-events:none}
.hand{display:inline-block;animation:swipe 1.8s ease-in-out infinite}
@keyframes swipe{0%,100%{transform:translateX(-8px)}50%{transform:translateX(8px)}}
.scroll-cue{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;color:var(--sun);text-decoration:none;font-weight:800;animation:bob 1.6s ease-in-out infinite}
@keyframes bob{50%{transform:translate(-50%,8px)}}

/* chapters */
.chapter{min-height:100svh;display:flex;align-items:center;padding:110px 0;position:relative}
.chapter.alt{background:radial-gradient(ellipse at 30% 20%,rgba(43,35,112,.75),rgba(11,16,54,.2) 70%)}
.wrap{width:min(1180px,100% - 48px);margin:0 auto}
.two{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(32px,5vw,72px);align-items:center}
.two.rev .media{order:2}
.num{display:inline-grid;place-items:center;width:52px;height:52px;border-radius:50%;background:var(--sun);color:var(--ink);font-family:var(--display);font-weight:700;font-size:26px;box-shadow:0 6px 0 #c99a1a}
h2{font-family:var(--display);font-weight:700;font-size:clamp(36px,4.6vw,64px);line-height:1.02;margin:.35em 0 .4em;color:var(--cream)}
.say{font-size:1.15em;margin:0 0 1em;max-width:34ch}
.say b{color:var(--sun)}
.center{text-align:center}
.center .say{margin-left:auto;margin-right:auto}
.try{font-weight:800;color:var(--mint);margin:.8em 0}

figure{margin:0;position:relative}
figcaption{font-size:.72em;font-weight:700;color:var(--muted);margin-top:10px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.tag{font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;padding:4px 10px;border-radius:99px;white-space:nowrap}
.tag.real{background:var(--mint);color:var(--ink)}
.tag.art{background:var(--coral);color:var(--ink)}
.photo img,.illus img{border-radius:var(--radius);box-shadow:0 30px 60px -20px rgba(0,0,0,.7),0 0 0 4px rgba(255,246,220,.12)}
.photo.round{border-radius:50%;overflow:hidden;aspect-ratio:1;box-shadow:0 0 80px rgba(255,246,220,.25)}
.photo.round figcaption{position:absolute;left:50%;bottom:4%;transform:translateX(-50%);background:rgba(11,16,54,.7);padding:4px 10px;border-radius:99px;margin:0}
.photo.round img{transform:scale(1.18);border-radius:50%;aspect-ratio:1;object-fit:cover;background:#000;box-shadow:0 0 80px rgba(255,246,220,.25),0 0 0 6px rgba(255,246,220,.1)}
.mini{max-width:420px;margin:6px 0 18px}
.mini img{aspect-ratio:16/10;object-fit:cover}
.tilt{transform-style:preserve-3d;transition:transform .25s ease-out;will-change:transform}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:12px;margin:0 0 20px}
.chip{position:relative;border:none;border-radius:20px;background:var(--plum);color:var(--cream);padding:14px 18px;min-height:56px;font-weight:800;font-size:.85em;max-width:290px;text-align:left;box-shadow:0 5px 0 #17124a;transition:transform .15s,background .3s}
.chip:hover{transform:translateY(-3px)}
.chip:active{transform:translateY(2px);box-shadow:0 2px 0 #17124a}
.chip .b{display:none}
.chip.open{background:var(--sun);color:var(--ink);box-shadow:0 5px 0 #c99a1a}
.chip.open .f{display:none}.chip.open .b{display:inline;animation:pop .35s}
.chip .f::after{content:" ?";opacity:0}
@keyframes pop{0%{transform:scale(.8);opacity:0}100%{transform:scale(1);opacity:1}}

.read,.pill{border:none;border-radius:99px;background:var(--coral);color:var(--ink);font-weight:800;padding:12px 22px;min-height:48px;font-size:.85em;box-shadow:0 5px 0 #c05a33;transition:transform .15s;display:inline-flex;align-items:center;gap:8px;text-decoration:none}
.read:hover,.pill:hover{transform:translateY(-2px)}
.read:active,.pill:active{transform:translateY(3px);box-shadow:0 2px 0 #c05a33}
.read.on{background:var(--mint);box-shadow:0 5px 0 #3fa58c}
.pill.big{font-size:1.15em;padding:16px 40px;background:var(--sun);box-shadow:0 6px 0 #c99a1a}
.ico{width:20px;height:20px;flex:none}

/* 3d stages */
.stage3d{width:100%;aspect-ratio:4/3;border-radius:var(--radius);overflow:hidden;background:radial-gradient(circle at 50% 50%,#1b2160,#070a26);box-shadow:inset 0 0 0 4px rgba(255,246,220,.08),0 30px 60px -20px rgba(0,0,0,.7);cursor:grab}
.stage3d.sq{aspect-ratio:1/1;max-width:520px;margin:0 auto}
.stage-ctrl{display:flex;gap:12px;justify-content:center;margin-top:18px;flex-wrap:wrap}

/* phases */
.phase-ui{max-width:520px;margin:18px auto 0;text-align:center}
#phase{width:100%;accent-color:var(--sun);height:36px}
input[type=range]{-webkit-appearance:none;appearance:none;background:transparent}
input[type=range]::-webkit-slider-runnable-track{height:14px;border-radius:99px;background:linear-gradient(90deg,#222a66,var(--sun))}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:40px;height:40px;border-radius:50%;background:var(--cream);border:5px solid var(--sun);margin-top:-13px;box-shadow:0 0 18px var(--sun)}
input[type=range]::-moz-range-track{height:14px;border-radius:99px;background:linear-gradient(90deg,#222a66,var(--sun))}
input[type=range]::-moz-range-thumb{width:30px;height:30px;border-radius:50%;background:var(--cream);border:5px solid var(--sun)}
.phase-names{font-family:var(--display);font-weight:700;font-size:1.6em;color:var(--sun);margin:6px 0 10px}
.phase-btns{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.phase-btns button{border:2px solid rgba(255,246,220,.3);background:transparent;color:var(--cream);border-radius:99px;padding:8px 14px;min-height:44px;font-weight:800;font-size:.8em}
.phase-btns button.on{background:var(--sun);color:var(--ink);border-color:var(--sun)}

/* craters */
.crater-box{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:0 30px 60px -20px rgba(0,0,0,.7);aspect-ratio:4/3;background:#8d8a84;cursor:crosshair;touch-action:manipulation}
#craterCanvas{width:100%;height:100%;display:block}
.crater-count{position:absolute;top:14px;left:14px;background:rgba(11,16,54,.75);padding:6px 14px;border-radius:99px;font-weight:800;font-size:.8em}
.crater-count span{color:var(--sun);font-size:1.2em}
.crater-tip{position:absolute;bottom:14px;left:0;right:0;text-align:center;margin:0;font-weight:800;color:var(--ink);text-shadow:0 1px 0 rgba(255,255,255,.4);pointer-events:none;animation:bob2 1.4s infinite}
@keyframes bob2{50%{transform:translateY(-6px)}}

/* stack */
.stack{position:relative;padding-bottom:60px}
.illus.big img{aspect-ratio:4/3;object-fit:cover}
.float-card{position:absolute;right:-14px;bottom:0;width:46%;transform:rotate(5deg)}
.float-card img{aspect-ratio:1;object-fit:cover;border:6px solid var(--cream);border-radius:18px}
.float-card figcaption{background:var(--night);padding:4px 8px;border-radius:12px;display:inline-flex}

/* jump */
.jump-stage{display:grid;grid-template-columns:1fr 1fr;gap:16px;height:440px}
.lane{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:0 20px 50px -20px rgba(0,0,0,.7)}
.lane.earth{background:linear-gradient(#7cc8ff,#cdeeff)}
.lane.moon{background:linear-gradient(#05071c,#1b1f4d)}
.lane.moon::before{content:"";position:absolute;inset:0;background-image:radial-gradient(2px 2px at 20% 30%,#fff,transparent),radial-gradient(2px 2px at 70% 15%,#fff,transparent),radial-gradient(1.5px 1.5px at 45% 55%,#fff,transparent),radial-gradient(2px 2px at 85% 45%,#fff,transparent);}
.lane .ground{position:absolute;left:0;right:0;bottom:0;height:70px}
.lane.earth .ground{background:#5fbf5a;border-top:6px solid #47a041}
.lane.moon .ground{background:radial-gradient(circle at 30% 40%,#8a8780 10%,transparent 11%),radial-gradient(circle at 75% 60%,#8a8780 7%,transparent 8%),#b7b3aa;border-top:6px solid #9d9990}
.kid{position:absolute;left:50%;bottom:62px;width:70px;margin-left:-35px}
.lane-label{position:absolute;top:12px;left:0;right:0;text-align:center;font-weight:800;font-size:.85em;color:var(--ink)}
.lane.moon .lane-label{color:var(--cream)}
.lane .mark{position:absolute;left:8px;right:8px;border-top:3px dashed rgba(255,207,74,.9);font-size:12px;font-weight:800;color:var(--sun);text-align:right;padding-right:4px;opacity:0;transition:opacity .4s}
.lane.earth .mark{border-color:#e76a3c;color:#c4471c}

/* trip */
.trip{display:block;height:300vh;padding:0}
.trip-sticky{position:sticky;top:0;height:100svh;overflow:hidden;display:grid;place-items:center}
.trip-bg{position:absolute;inset:-5%;background-size:cover;background-position:center;transform:scale(1.1)}
.trip-shade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,16,54,.75),rgba(11,16,54,.35) 50%,rgba(11,16,54,.8))}
.trip-inner{position:relative;text-align:center;width:min(1000px,100% - 40px)}
.trip-inner .say{margin:0 auto 1em}
.track{position:relative;display:flex;align-items:center;gap:0;margin:40px 0 10px;height:90px}
.planet{width:80px;height:80px;border-radius:50%;flex:none;z-index:2}
.planet.e{background:url(img/tex_earth.jpg) center/cover;box-shadow:inset -12px -8px 20px rgba(0,0,0,.6),0 0 30px #4aa3ff}
.planet.m{width:44px;height:44px;background:url(img/tex_moon_b.jpg) center/cover;box-shadow:inset -8px -6px 12px rgba(0,0,0,.6),0 0 24px rgba(255,246,220,.6)}
.path{flex:1;height:6px;border-radius:9px;background:repeating-linear-gradient(90deg,rgba(255,246,220,.5) 0 10px,transparent 10px 20px);position:relative}
.path .fill{position:absolute;left:0;top:0;bottom:0;width:0;background:var(--sun);border-radius:9px;box-shadow:0 0 12px var(--sun)}
.rocket{position:absolute;left:80px;top:50%;transform:translate(-50%,-50%) rotate(90deg);z-index:3;filter:drop-shadow(0 0 10px rgba(255,138,92,.8))}
.rocket svg{width:64px;height:64px}
.odo{font-family:var(--display);font-weight:700;font-size:clamp(40px,7vw,84px);color:var(--sun);line-height:1;margin-top:10px;font-variant-numeric:tabular-nums}
.days{font-weight:800;font-size:1.1em;margin:6px 0 20px;color:var(--mint)}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;perspective:1400px}
.card{border:none;background:none;padding:0;aspect-ratio:3/4;color:inherit}
.card-in{display:block;position:relative;width:100%;height:100%;transition:transform .8s cubic-bezier(.3,1.4,.5,1);transform-style:preserve-3d}
.card.flipped .card-in{transform:rotateY(180deg)}
.face{position:absolute;inset:0;border-radius:var(--radius);overflow:hidden;backface-visibility:hidden;-webkit-backface-visibility:hidden;box-shadow:0 30px 50px -20px rgba(0,0,0,.8)}
.face.front img{width:100%;height:100%;object-fit:cover}
.face.front .tag{position:absolute;left:12px;top:12px}
.face.back{transform:rotateY(180deg);background:linear-gradient(160deg,var(--plum),#3d3392);display:flex;flex-direction:column;justify-content:center;padding:28px;text-align:left;font-weight:700;font-size:1em}
.face.back b{font-family:var(--display);font-size:2.6em;color:var(--sun);line-height:1;margin-bottom:12px}
.card:hover .card-in{transform:rotateY(8deg) translateY(-6px)}
.card.flipped:hover .card-in{transform:rotateY(172deg) translateY(-6px)}

/* quiz */
.quiz{display:grid;gap:22px;max-width:860px;margin:30px auto 0}
.q{background:rgba(43,35,112,.7);border-radius:var(--radius);padding:24px;border:3px solid rgba(255,246,220,.08)}
.q h3{font-family:var(--display);font-size:1.3em;margin:0 0 14px}
.opts{display:flex;flex-wrap:wrap;gap:12px}
.opts button{flex:1 1 160px;min-height:64px;border:none;border-radius:20px;background:var(--cream);color:var(--ink);font-weight:800;font-size:.95em;box-shadow:0 5px 0 #c8bfa2;transition:transform .15s,background .3s}
.opts button:hover{transform:translateY(-2px)}
.opts button.right{background:var(--mint);box-shadow:0 5px 0 #3fa58c;animation:pop .4s}
.opts button.wrong{background:#ffb4a0;animation:shake .4s}
@keyframes shake{25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
.q .fb{min-height:1.5em;font-weight:800;color:var(--sun);margin-top:12px}
.score{text-align:center;font-family:var(--display);font-size:1.6em;color:var(--sun);margin-top:24px;min-height:1.4em}
.burst{position:fixed;pointer-events:none;z-index:50;font-size:26px;color:var(--sun)}

/* goodnight */
.goodnight{min-height:110svh;align-items:flex-end;overflow:hidden}
.gn-bg{position:absolute;inset:0;background-size:cover;background-position:center 30%}
.gn-shade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,16,54,.1) 30%,rgba(11,16,54,.92) 85%)}
.gn-copy{position:relative;width:min(900px,100% - 40px);margin:0 auto;text-align:center;padding-bottom:30px}
.gn-copy .say{margin:0 auto 1em}
.gn-title{font-size:clamp(48px,8vw,110px);text-shadow:0 6px 0 var(--plum),0 0 40px rgba(255,207,74,.5)}
.again{margin-left:10px;background:var(--sun);box-shadow:0 5px 0 #c99a1a}

.credits{padding:28px 24px 40px;text-align:center;font-size:13px;color:var(--muted);background:#070a26}
.credits a{color:var(--muted)}

/* reveal (only when JS is on) */
.js .reveal{opacity:0;transform:translateY(50px) scale(.97);transition:opacity .9s ease,transform .9s cubic-bezier(.2,.9,.3,1.2)}
.js .reveal.in{opacity:1;transform:none}

@media (max-width:860px){
  .two{grid-template-columns:1fr;gap:28px}
  .two.rev .media{order:0}
  .cards{grid-template-columns:1fr;max-width:380px;margin-left:auto;margin-right:auto}
  .dots{display:none}
  .jump-stage{height:360px}
  .chapter{padding:80px 0}
  .say{max-width:none}
  .planet{width:56px;height:56px}.planet.m{width:32px;height:32px}
  .float-card{right:-6px;width:44%}
  .mini{max-width:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .js .reveal{opacity:1;transform:none}
}