:root{
  --bg:#000; --fg:#fff; --muted:#5d636e; --teal:#58d8b9; --card:#1b1b1b;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
*,*::before,*::after{box-sizing:inherit}
html{background:var(--bg);scroll-snap-type:y proximity;scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--bg);color:var(--fg);font-family:"Barlow","Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
#gl{position:fixed;inset:0;width:100%;height:100%;display:block;z-index:0}
#track section{height:100vh;scroll-snap-align:start}

/* header */
#top{position:fixed;left:0;right:0;top:env(safe-area-inset-top,0px);z-index:6;display:flex;justify-content:space-between;align-items:flex-start;padding:clamp(14px,1.6vw,30px) clamp(16px,1.6vw,34px);pointer-events:none}
#top .logo{display:block;width:clamp(96px,9.5vw,190px);height:auto}
#top .by{display:block;width:clamp(150px,15vw,300px);height:auto}

/* headline */
#hero{position:fixed;left:clamp(16px,1.6vw,34px);top:50.5%;z-index:3;pointer-events:none;will-change:transform,opacity}
#hero h1{margin:0;font-weight:400;text-transform:uppercase;font-size:clamp(2.3rem,4.55vw,6.4rem);line-height:1.02;letter-spacing:-.005em}

/* labels */
#labels{position:fixed;inset:0;z-index:2;pointer-events:none;overflow:hidden}
.lbl{position:absolute;left:0;top:0;pointer-events:auto;white-space:nowrap;line-height:1;font-weight:400;
  text-transform:uppercase;padding:.1em .15em;will-change:transform,opacity;letter-spacing:.005em}
.lbl .sub{position:absolute;left:.15em;top:calc(100% + .32em);font-size:.27em;color:var(--teal);letter-spacing:.02em;
  display:flex;gap:.9em;align-items:center;opacity:0}
.lbl .sub i{width:.5em;height:.5em;border-radius:50%;background:var(--teal);display:block;margin-left:-.4em}
.lbl .desc{position:absolute;left:.15em;top:calc(100% + .34em);font-size:.2em;font-weight:300;color:var(--muted);
  letter-spacing:.01em;text-transform:none;text-align:left;white-space:normal;max-width:15em;line-height:1.4;opacity:0}
.lbl:focus-visible{outline:2px solid var(--teal);outline-offset:4px;border-radius:4px}

/* left index */
#index{position:fixed;left:clamp(16px,1.6vw,34px);top:50%;transform:translateY(-50%);z-index:4;display:flex;flex-direction:column;gap:.7em;opacity:0;pointer-events:none}
#index.on{pointer-events:auto}
#index button{display:flex;align-items:center;gap:.7em;text-align:left;text-transform:uppercase;color:var(--muted);
  font-size:clamp(.85rem,1.1vw,1.15rem);transition:color .25s}
#index button::before{content:"";width:.42em;height:.42em;border-radius:50%;background:currentColor;opacity:0;transition:opacity .25s}
#index button.act{color:var(--fg)}
#index button.act::before{opacity:1}
#index button:hover{color:var(--fg)}
#index button:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:3px}

/* bottom left */
#bl{position:fixed;left:clamp(16px,1.6vw,34px);bottom:calc(clamp(14px,1.6vw,30px) + env(safe-area-inset-bottom,0px));z-index:5;
  display:flex;flex-direction:column;align-items:flex-start;gap:1.1em;font-size:clamp(.72rem,.95vw,1rem);text-transform:uppercase}
.pill{display:flex;align-items:center;gap:.9em;background:#fff;color:#000;border-radius:7px;padding:.75em 1.3em .75em 1.1em;
  text-decoration:none;cursor:pointer;transition:background .2s}
.pill:hover,.pill:focus-visible{background:#e4e4e4}
.dot{width:.55em;height:.55em;border-radius:50%;background:currentColor;display:inline-block;flex:none}
#cue{display:flex;align-items:center;gap:.9em;padding:0 0 0 1.1em;text-transform:uppercase}
#cue .dot{animation:bob 1.8s ease-in-out infinite}
@keyframes bob{50%{transform:translateY(.35em)}}

/* collaboration card */
#collab{position:fixed;right:clamp(16px,1.6vw,34px);bottom:calc(clamp(14px,1.6vw,30px) + env(safe-area-inset-bottom,0px));z-index:6;
  display:flex;flex-direction:column;align-items:flex-end;gap:.9em}
#collab .hint{color:var(--teal);font-size:clamp(.7rem,.9vw,.95rem);text-transform:uppercase;transition:opacity .3s}
#card{width:clamp(210px,13.6vw,300px);background:#fff;color:#000;border-radius:14px;padding:1em 1.1em;text-align:left;
  transition:width .45s cubic-bezier(.2,.8,.2,1),background .3s,color .3s}
#card .hd{display:flex;gap:.8em;align-items:flex-start;font-size:clamp(1rem,1.45vw,1.6rem);line-height:1.25}
#card .hd .dot{margin-top:.55em;width:.4em;height:.4em}
#card .more{max-height:0;opacity:0;overflow:hidden;transition:max-height .5s cubic-bezier(.2,.8,.2,1),opacity .35s;font-size:clamp(.78rem,.95vw,1rem);line-height:1.4}
#card .more p{margin:1.6em 0 0}
#card .more hr{border:0;border-top:1px solid rgba(255,255,255,.22);margin:1.4em 0 .9em}
#card .more dl{margin:0;display:grid;grid-template-columns:1fr auto;gap:.1em 1em;font-size:1.1em;line-height:1.3}
#card .more dd{margin:0;text-align:right}
#collab:hover #card,#collab:focus-within #card,#collab.open #card{width:clamp(300px,26vw,470px);background:var(--card);color:#fff}
#collab:hover .more,#collab:focus-within .more,#collab.open .more{max-height:420px;opacity:1}
#collab:hover .hint,#collab:focus-within .hint,#collab.open .hint{opacity:0}
#card:focus-visible{outline:2px solid var(--teal);outline-offset:3px}

#fallback{position:fixed;inset:0;display:none;align-items:center;justify-content:center;padding:24px;text-align:center;color:#9aa0ab;z-index:9}

@media (max-width:700px){
  #hero{top:66%}
  #hero h1{font-size:11.5vw}
  #index{display:none}
  #bl{font-size:.7rem}
  #card{width:170px;padding:.8em .9em}
  #card .hd{font-size:.95rem}
  .lbl .desc{max-width:11em;font-size:.24em}
  #collab:hover #card,#collab:focus-within #card,#collab.open #card{width:min(300px,calc(100vw - 32px))}
}
@media (prefers-reduced-motion:reduce){#cue .dot{animation:none}}

/* black holes */
#gl{transition:transform .85s cubic-bezier(.6,0,.85,1),filter .85s cubic-bezier(.6,0,.85,1)}
#gl.warp-in{transform:scale(7);filter:blur(10px) brightness(1.6)}
#gl.warp-out{transform:scale(.4);filter:blur(6px) brightness(.4)}
#gl.hole{cursor:pointer}

#flash{position:fixed;inset:0;z-index:7;background:radial-gradient(circle at var(--fx,50%) var(--fy,50%),rgba(255,255,255,.95),rgba(120,190,255,.5) 35%,rgba(0,0,0,0) 70%);
  opacity:0;pointer-events:none;transition:opacity .5s ease}
#flash.on{opacity:1;transition:opacity .28s ease-out}
#starHint{
position:fixed;
z-index:10;
padding:.55em .9em;
border:1px solid rgba(255,255,255,.35);
border-radius:999px;
background:rgba(0,0,0,.75);
backdrop-filter:blur(8px);
-webkit-backdrop-filter:blur(8px);
color:#fff;
font-size:.72rem;
letter-spacing:.08em;
text-transform:uppercase;
pointer-events:none;
opacity:0;
transform:translate(12px,12px);
transition:opacity:.2s ease;
white-space:nowrap;
}

#starHint.on{
opacity:1;
}
#enterHint{position:fixed;left:50%;bottom:calc(18px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);z-index:5;
  font-size:clamp(.68rem,.85vw,.85rem);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);opacity:0;
  pointer-events:none;transition:opacity .5s}
#enterHint.on{opacity:1}

#world{position:fixed;inset:0;z-index:8;display:flex;align-items:center;justify-content:center;text-align:center;padding:8vh 6vw;
  background:radial-gradient(ellipse at 50% 45%,rgba(30,42,70,.9),rgba(0,0,0,.98) 68%);opacity:0;pointer-events:none;
  transform:scale(1.08);filter:blur(6px);transition:opacity .6s ease,transform .7s cubic-bezier(.2,.8,.2,1),filter .7s ease}
#world.on{opacity:1;pointer-events:auto;transform:scale(1);filter:blur(0)}
#world .wrap{max-width:760px}
#world .tag{display:inline-flex;align-items:center;gap:.7em;color:var(--teal);text-transform:uppercase;letter-spacing:.08em;
  font-size:clamp(.72rem,.95vw,.95rem);margin-bottom:1.1em}
#world .tag i{width:.5em;height:.5em;border-radius:50%;background:var(--teal);display:block}
#world h2{margin:0 0 .5em;font-weight:400;text-transform:uppercase;font-size:clamp(2.4rem,6vw,5rem);line-height:1.02;letter-spacing:-.01em}
#world p{margin:0 auto;max-width:44em;font-size:clamp(.95rem,1.25vw,1.3rem);line-height:1.6;color:#c6cad3;font-weight:300}
#world .back{margin-top:2.4em;display:inline-flex;align-items:center;gap:.6em;text-transform:uppercase;letter-spacing:.06em;
  font-size:clamp(.78rem,1vw,1rem);color:#fff;border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:.85em 1.7em;
  transition:background .25s,border-color .25s}
#world .back:hover{background:rgba(255,255,255,.12);border-color:#fff}
#world .back:focus-visible{outline:2px solid var(--teal);outline-offset:3px}
#world .back svg{width:1em;height:1em}

@media (max-width:700px){
  #gl.warp-in{transform:scale(4.5)}
  #world h2{font-size:9vw}
}
@media (prefers-reduced-motion:reduce){
  #gl,#gl.warp-in,#gl.warp-out,#world,#flash{transition-duration:.15s !important;filter:none !important;transform:none !important}
}