/* ============================================================
   Research — interactive, scientifically-grounded simulations
   Themed to match the site (black / white / grey + red accent)
   ============================================================ */
@font-face{font-family:'GFMono';src:url('fonts/c322f9101d11e4655c4d3c822869_57991824.woff2') format('woff2');font-display:swap}
@font-face{font-family:'GFHelv';src:url('fonts/helveticaw01boldwoff2_4a6a2be7.woff2') format('woff2');font-weight:700;font-display:swap}

:root{
  --bg:#000002; --fg:#fff; --muted:rgba(255,255,255,.56); --faint:rgba(255,255,255,.34);
  --line:rgba(255,255,255,.12); --panel:rgba(255,255,255,.02);
  --accent:#ff4242; --accent2:#ff7a7a;
  --mono:'GFMono',ui-monospace,'SFMono-Regular',Menlo,monospace;
  --disp:'GFHelv','Helvetica Neue',Arial,sans-serif;
  --wrap:1240px; --pad:clamp(20px,5vw,64px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body.research{margin:0;background:var(--bg);color:var(--fg);font-family:var(--mono);
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
.research a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--pad)}
#stars{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
.research>*{position:relative;z-index:1}

/* nav */
.r-nav{display:flex;align-items:center;justify-content:space-between;
  padding:22px var(--pad);font-size:13px;letter-spacing:.18em;text-transform:lowercase;
  position:absolute;top:0;left:0;right:0;z-index:5}
.r-nav a{opacity:.78;transition:opacity .25s}
.r-nav a:hover{opacity:1}
.r-nav .group{display:flex;gap:clamp(14px,2.6vw,36px)}
.r-nav .here{color:var(--accent);opacity:1}

/* hero */
.r-hero{padding-block:130px 40px}
.r-hero h1{font-family:var(--disp);font-weight:700;letter-spacing:.3px;margin:0;
  font-size:clamp(30px,4.4vw,56px);line-height:1.06}
.r-hero .lead{max-width:64ch;margin:24px 0 0;color:var(--muted);
  font-size:clamp(14px,1.4vw,17px);line-height:1.75}
.r-hero .tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.r-hero .tags span{font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--faint);border:1px solid var(--line);border-radius:999px;padding:7px 14px}

/* module */
.module{padding:64px 0;border-top:1px solid var(--line)}
.module__eyebrow{font-size:11px;letter-spacing:.4em;text-transform:uppercase;color:var(--accent);margin:0 0 14px}
.module__eyebrow b{color:var(--faint);font-weight:400}
.module h2{font-family:var(--disp);font-weight:700;text-transform:none;letter-spacing:.2px;
  margin:0 0 16px;font-size:clamp(22px,3vw,34px);line-height:1.1}
.module__desc{max-width:64ch;color:var(--muted);line-height:1.8;font-size:14px;margin:0 0 30px}
.module__desc b{color:#fff;font-weight:400}

.stage{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(260px,.9fr);
  gap:26px;align-items:start}
@media (max-width:880px){.stage{grid-template-columns:1fr}}

.viewport{position:relative;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  background:#000;aspect-ratio:1/1}
.viewport canvas{display:block;width:100%;height:100%;touch-action:none}
.viewport .hint{position:absolute;left:12px;bottom:10px;font-size:10.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--faint);pointer-events:none;
  background:rgba(0,0,0,.4);padding:5px 9px;border-radius:6px}
.viewport .badge{position:absolute;right:12px;top:12px;font-size:11px;letter-spacing:.1em;
  color:#fff;background:rgba(0,0,0,.45);border:1px solid var(--line);border-radius:8px;
  padding:7px 11px;line-height:1.5;pointer-events:none;backdrop-filter:blur(3px)}
.viewport .badge b{color:var(--accent);font-weight:400}

/* control panel */
.panel{display:flex;flex-direction:column;gap:18px}
.ctl{display:flex;flex-direction:column;gap:9px}
.ctl__row{display:flex;align-items:center;justify-content:space-between;gap:12px}
.ctl label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.ctl .val{font-size:12px;color:var(--accent)}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:2px;
  background:var(--line);border-radius:2px;outline:none;cursor:pointer}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:15px;height:15px;border-radius:50%;
  background:var(--accent);cursor:pointer;box-shadow:0 0 0 4px rgba(255,66,66,.18)}
input[type=range]::-moz-range-thumb{width:15px;height:15px;border:none;border-radius:50%;background:var(--accent);cursor:pointer}

/* toggle switch */
.tog{display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer;
  font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);user-select:none}
.tog input{display:none}
.tog .sw{width:40px;height:22px;border-radius:999px;background:rgba(255,255,255,.12);
  position:relative;transition:background .25s;flex:none}
.tog .sw::after{content:"";position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;
  background:#fff;transition:transform .25s}
.tog input:checked + .sw{background:var(--accent)}
.tog input:checked + .sw::after{transform:translateX(18px)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);cursor:pointer;
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:#fff;background:none;
  border:1px solid rgba(255,255,255,.55);border-radius:999px;padding:11px 20px;transition:.25s}
.btn:hover{background:#fff;color:#0a0a0a}
.btn--accent{border-color:var(--accent)}
.btn--accent:hover{background:var(--accent);color:#0a0a0a}
.btnrow{display:flex;flex-wrap:wrap;gap:10px}

/* readout chips */
.readout{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.chip{border:1px solid var(--line);border-radius:9px;padding:10px 12px;background:var(--panel)}
.chip .k{font-size:9.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--faint)}
.chip .v{font-size:15px;margin-top:3px;font-variant-numeric:tabular-nums}
.chip .v.accent{color:var(--accent)}

/* high-z filter strip */
.filters{display:flex;gap:6px;margin-top:6px}
.filt{flex:1;text-align:center;border:1px solid var(--line);border-radius:7px;padding:9px 4px;
  font-size:10px;letter-spacing:.06em;color:var(--faint);transition:.3s;background:var(--panel)}
.filt.lit{color:#0a0a0a;background:#fff;border-color:#fff}
.filt.drop{opacity:.28}
.filt .f{display:block;font-size:9px;margin-top:3px;opacity:.7}

/* focus buttons + Pop III vs enriched comparison */
.btn--mini{padding:8px 13px;font-size:11px;letter-spacing:.1em}
.btn.on{background:var(--accent);color:#0a0a0a;border-color:var(--accent)}
.focusrow{display:flex;flex-wrap:wrap;gap:8px}
.cmp{display:grid;grid-template-columns:auto 1fr 1fr;gap:6px 12px;align-items:center;
  border:1px solid var(--line);border-radius:10px;padding:13px 14px;background:var(--panel);font-size:11.5px}
.cmp__h{font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);padding-bottom:4px;border-bottom:1px solid var(--line)}
.cmp__pop{color:#a9c6ff} .cmp__enr{color:var(--accent2)}
.cmp__k{color:var(--muted);text-transform:uppercase;letter-spacing:.07em;font-size:9.5px}
.cmp>div{line-height:1.4;font-variant-numeric:tabular-nums}

/* lensed Pop III explorer (module 3) */
#lpCanvas{transition:opacity .32s ease-in-out}
.lp-steps{display:flex;justify-content:space-between;gap:6px;position:relative;margin-bottom:2px}
.lp-steps::before{content:"";position:absolute;left:6px;right:6px;top:5px;height:2px;background:var(--line)}
.lp-step{flex:1;background:none;border:none;cursor:pointer;padding:0;color:var(--faint);
  display:flex;flex-direction:column;align-items:flex-start;gap:9px;position:relative;z-index:1;transition:color .25s}
.lp-step .d{width:12px;height:12px;border-radius:50%;background:#0a0a0c;border:2px solid var(--line);transition:.25s}
.lp-step .t{font-size:9px;letter-spacing:.12em;text-transform:uppercase}
.lp-step:hover{color:var(--muted)}
.lp-step.on{color:#fff}
.lp-step.on .d{border-color:var(--accent);background:var(--accent);box-shadow:0 0 0 4px rgba(255,66,66,.18)}
.lp-step.done .d{border-color:var(--accent2);background:var(--accent2)}
.lp-narr{min-height:104px}
.lp-narr h3{font-family:var(--disp);font-weight:700;font-size:16px;margin:0 0 8px}
.lp-narr p{color:var(--muted);line-height:1.7;font-size:13px;margin:0;transition:opacity .28s}
.lp-narr.fade h3,.lp-narr.fade p{opacity:0}
.lp-ctl{min-height:8px}
.lp-ctlgrp{display:none}
.lp-ctlgrp.show{display:block}
.lp-cap{border-left:2px solid var(--accent);padding:4px 0 4px 14px;color:var(--muted);
  font-size:11.5px;line-height:1.65;font-style:italic;margin:4px 0 0}
.btn.is-off{opacity:.35;pointer-events:none}

/* footer */
.r-foot{border-top:1px solid var(--line);margin-top:30px;padding:36px var(--pad);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint)}
.r-foot a:hover{color:#fff}
.note{font-size:11px;color:var(--faint);line-height:1.6;margin-top:14px}

/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform .9s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}*{scroll-behavior:auto}}