/* ============================================================
   VOLTAIC — electric dark, chrome, technical
   ============================================================ */

:root{
  --ink:#04060c;
  --ink-2:#080c16;
  --paper:#e8edf6;
  --dim:#7d8aa3;
  --cyan:#4de2ff;
  --violet:#8b7bff;
  --amber:#ffab5e;
  --edge:rgba(232,237,246,.12);
  --edge-soft:rgba(232,237,246,.06);
  --max:1280px;
  --ease:cubic-bezier(.16,1,.3,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--ink);
  color:var(--paper);
  font-family:'Space Grotesk',system-ui,sans-serif;
  font-size:17px;
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--cyan);color:var(--ink)}

/* ---------- fixed layers ---------- */
#gl{position:fixed;inset:0;z-index:0;display:block}
body.no-gl #gl{display:none}
body.no-gl{background:
  radial-gradient(ellipse 80% 60% at 50% 30%, #123049 0%, transparent 60%),
  radial-gradient(ellipse 60% 50% at 20% 70%, #2a1840 0%, transparent 60%),
  var(--ink);
}

.grain{
  position:fixed;inset:-200%;z-index:1;pointer-events:none;opacity:.20;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
  animation:grainShift 7s steps(6) infinite;
  mix-blend-mode:overlay;
}
@keyframes grainShift{
  0%{transform:translate(0,0)}20%{transform:translate(-3%,2%)}
  40%{transform:translate(2%,-3%)}60%{transform:translate(-2%,-2%)}
  80%{transform:translate(3%,1%)}100%{transform:translate(0,0)}
}
.vignette{
  position:fixed;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(ellipse 120% 100% at 50% 45%, transparent 40%, rgba(2,3,8,.92) 100%);
}
/* legibility scrim — the shader lives behind the type, so the left third
   gets a soft ink wash that keeps contrast without looking like a panel */
.scrim{
  position:fixed;inset:0;z-index:2;pointer-events:none;
  background:linear-gradient(100deg,
    rgba(4,6,12,.94) 0%,
    rgba(4,6,12,.80) 26%,
    rgba(4,6,12,.34) 48%,
    rgba(4,6,12,0) 68%);
  opacity:1;transition:opacity .6s var(--ease);
}
@media(max-width:860px){
  .scrim{background:linear-gradient(180deg,rgba(4,6,12,.90) 0%,rgba(4,6,12,.62) 46%,rgba(4,6,12,.30) 100%)}
}
/* Past the hero the shader must stop competing with the copy. This dimmer
   ramps in on scroll so the metal recedes to a presence rather than a
   subject — set from JS via --dim. */
.dimmer{
  position:fixed;inset:0;z-index:2;pointer-events:none;
  background:rgba(3,5,11,1);
  opacity:var(--dim,0);
  transition:opacity .25s linear;
}
/* content sections float on their own faint plate so long-form copy always
   has a floor under it */
.section .wrap{position:relative}
.section:not(.closer) .wrap::before{
  content:'';position:absolute;inset:-42px -46px;z-index:-1;
  background:radial-gradient(ellipse 92% 84% at 34% 50%, rgba(4,6,12,.86) 0%, rgba(4,6,12,.55) 52%, transparent 82%);
  border-radius:6px;pointer-events:none;
}
.closer .wrap{
  padding:64px 32px;
  background:radial-gradient(ellipse 78% 100% at 50% 50%, rgba(4,6,12,.90) 0%, rgba(4,6,12,.60) 55%, transparent 85%);
}

/* ---------- nav ---------- */
#nav{
  position:fixed;top:0;left:0;right:0;z-index:20;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px clamp(20px,4vw,44px);
  transition:background .5s var(--ease), backdrop-filter .5s var(--ease), border-color .5s;
  border-bottom:1px solid transparent;
}
#nav.stuck{
  background:rgba(4,6,12,.72);
  backdrop-filter:blur(18px) saturate(1.3);
  border-bottom-color:var(--edge-soft);
}
.wordmark{
  display:flex;align-items:center;gap:9px;
  color:var(--paper);text-decoration:none;
  font-weight:600;font-size:15px;letter-spacing:.26em;
}
.wordmark svg{width:17px;height:17px;fill:var(--cyan);filter:drop-shadow(0 0 8px rgba(77,226,255,.7))}
.navlinks{display:flex;gap:30px}
.navlinks a{
  color:var(--dim);text-decoration:none;font-size:13px;letter-spacing:.1em;
  text-transform:uppercase;font-weight:500;position:relative;padding:4px 0;
  transition:color .35s var(--ease);
}
.navlinks a::after{
  content:'';position:absolute;left:0;bottom:0;width:0;height:1px;
  background:var(--cyan);transition:width .45s var(--ease);
}
.navlinks a:hover{color:var(--paper)}
.navlinks a:hover::after{width:100%}
.navcta{
  color:var(--paper);text-decoration:none;font-size:13px;font-weight:500;
  letter-spacing:.06em;padding:10px 20px;border:1px solid var(--edge);
  border-radius:2px;transition:all .4s var(--ease);white-space:nowrap;
}
.navcta:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 26px rgba(77,226,255,.22)}
@media(max-width:860px){.navlinks{display:none}}

/* ---------- hero ---------- */
#hero{
  position:relative;z-index:10;min-height:100svh;
  display:flex;flex-direction:column;justify-content:center;
  padding:120px clamp(20px,4vw,44px) 80px;
  max-width:var(--max);margin:0 auto;width:100%;
}
.hero-inner{max-width:900px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:'JetBrains Mono',monospace;font-size:11.5px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--cyan);
  border:1px solid rgba(77,226,255,.28);border-radius:100px;
  padding:7px 16px;margin-bottom:34px;
  background:rgba(77,226,255,.05);
  backdrop-filter:blur(8px);
}
.pulse{
  width:6px;height:6px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 0 rgba(77,226,255,.8);animation:pulse 2.4s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(77,226,255,.7)}
  70%{box-shadow:0 0 0 11px rgba(77,226,255,0)}
  100%{box-shadow:0 0 0 0 rgba(77,226,255,0)}
}

.display{
  font-size:clamp(3rem,9.2vw,8.6rem);
  line-height:.92;font-weight:500;letter-spacing:-.045em;
}
.display em{
  font-style:normal;
  background:linear-gradient(100deg,var(--cyan) 0%,var(--violet) 55%,var(--amber) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  background-size:200% 100%;
  animation:shimmer 9s linear infinite;
}
@keyframes shimmer{0%{background-position:0% 50%}100%{background-position:200% 50%}}
.line{display:block;overflow:hidden}
.line>span{
  display:block;
  transform:translateY(105%);
  animation:lineUp 1.15s var(--ease) forwards;
}
.line:nth-child(1)>span{animation-delay:.20s}
.line:nth-child(2)>span{animation-delay:.31s}
.line:nth-child(3)>span{animation-delay:.42s}
@keyframes lineUp{to{transform:translateY(0)}}

.lede{
  margin-top:32px;max-width:520px;font-size:clamp(1rem,1.5vw,1.18rem);
  line-height:1.65;color:var(--dim);
}
.lede.center{margin-left:auto;margin-right:auto;text-align:center}
.hero-actions{display:flex;gap:14px;margin-top:42px;flex-wrap:wrap}

.btn-primary{
  display:inline-block;background:var(--paper);color:var(--ink);
  text-decoration:none;font-size:14px;font-weight:600;letter-spacing:.02em;
  padding:15px 30px;border-radius:2px;position:relative;overflow:hidden;
  transition:transform .45s var(--ease), box-shadow .45s var(--ease);
}
.btn-primary::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(100deg,var(--cyan),var(--violet));
  opacity:0;transition:opacity .45s var(--ease);z-index:-1;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 40px -12px rgba(77,226,255,.55)}
.btn-primary.big{padding:19px 46px;font-size:15px;margin-top:38px}
.btn-ghost{
  display:inline-flex;align-items:center;gap:9px;color:var(--paper);
  text-decoration:none;font-size:14px;font-weight:500;padding:15px 26px;
  border:1px solid var(--edge);border-radius:2px;
  transition:all .4s var(--ease);
}
.btn-ghost span{transition:transform .4s var(--ease);display:inline-block}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-ghost:hover span{transform:translateX(5px)}

.scrollhint{
  position:absolute;bottom:34px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:11px;
  font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.34em;color:var(--dim);
}
.scrollhint .bar{
  width:1px;height:44px;
  background:linear-gradient(to bottom,transparent,var(--cyan));
  animation:barPulse 2.6s var(--ease) infinite;
}
@keyframes barPulse{0%,100%{opacity:.25;transform:scaleY(.55)}50%{opacity:1;transform:scaleY(1)}}

/* ---------- ticker ---------- */
#ticker{
  position:relative;z-index:10;overflow:hidden;
  border-top:1px solid var(--edge-soft);border-bottom:1px solid var(--edge-soft);
  background:rgba(4,6,12,.55);backdrop-filter:blur(12px);
  padding:15px 0;
}
.ticker-track{
  display:flex;gap:52px;width:max-content;
  animation:tickerScroll 44s linear infinite;
  font-family:'JetBrains Mono',monospace;font-size:12.5px;letter-spacing:.06em;
}
.tick{display:flex;align-items:center;gap:11px;color:var(--dim);white-space:nowrap}
.tick b{color:var(--paper);font-weight:500}
.tick .up{color:var(--cyan)}
.tick .down{color:var(--amber)}
@keyframes tickerScroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
.section{position:relative;z-index:10;padding:clamp(90px,14vh,150px) clamp(20px,4vw,44px)}
.wrap{max-width:var(--max);margin:0 auto}
.sec-label{
  font-family:'JetBrains Mono',monospace;font-size:11.5px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--cyan);margin-bottom:26px;
}
.sec-head{
  font-size:clamp(2rem,5.2vw,4.1rem);line-height:1.04;
  font-weight:500;letter-spacing:-.035em;max-width:16ch;
}
.sec-head .dim{color:var(--dim)}
.split{
  display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,80px);
  margin-top:58px;padding-top:38px;border-top:1px solid var(--edge-soft);
}
@media(max-width:760px){.split{grid-template-columns:1fr}}
.body{color:var(--dim);font-size:clamp(.98rem,1.35vw,1.08rem);line-height:1.72}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;margin-top:56px;background:var(--edge-soft)}
@media(max-width:900px){.cards{grid-template-columns:1fr}}
.card{
  background:rgba(6,9,18,.80);backdrop-filter:blur(14px);
  padding:40px 34px 32px;position:relative;overflow:hidden;
  transition:background .55s var(--ease), transform .55s var(--ease);
}
.card::after{
  content:'';position:absolute;left:0;top:0;height:2px;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  transition:width .7s var(--ease);
}
.card:hover{background:rgba(11,17,32,.92);transform:translateY(-4px)}
.card:hover::after{width:100%}
.card-idx{
  font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--cyan);
  letter-spacing:.2em;margin-bottom:26px;opacity:.75;
}
.card h3{font-size:1.42rem;font-weight:500;letter-spacing:-.02em;margin-bottom:14px;line-height:1.22}
.card p{color:var(--dim);font-size:.96rem;line-height:1.66}
.card-meta{
  display:flex;justify-content:space-between;align-items:baseline;
  margin-top:34px;padding-top:16px;border-top:1px solid var(--edge-soft);
  font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.14em;color:var(--dim);
}
.card-meta b{color:var(--paper);font-size:15px;font-weight:500;letter-spacing:0}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:56px;background:var(--edge-soft)}
@media(max-width:900px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{background:var(--ink);padding:44px 26px;text-align:left}
.stat b{
  display:block;font-size:clamp(2.3rem,5vw,3.9rem);font-weight:400;
  letter-spacing:-.045em;line-height:1;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(160deg,var(--paper) 30%,var(--dim));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat span{
  display:block;margin-top:14px;font-family:'JetBrains Mono',monospace;
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);
}

/* ---------- closer ---------- */
.closer{text-align:center;padding-top:clamp(110px,18vh,190px);padding-bottom:clamp(110px,18vh,190px)}
.closer-head{font-size:clamp(3.4rem,13vw,10rem);letter-spacing:-.05em;line-height:.88}

/* ---------- footer ---------- */
footer{position:relative;z-index:10;border-top:1px solid var(--edge-soft);padding:34px clamp(20px,4vw,44px);background:rgba(4,6,12,.72)}
.footrow{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-family:'JetBrains Mono',monospace;font-size:11.5px;letter-spacing:.1em;color:var(--dim);
}
.footrow a{color:var(--dim);text-decoration:none;transition:color .35s}
.footrow a:hover{color:var(--cyan)}
@media(max-width:700px){.footmid{display:none}}

/* ---------- reveals ---------- */
[data-reveal]{opacity:0;transform:translateY(26px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
[data-reveal].in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .line>span{transform:none}
  [data-reveal]{opacity:1;transform:none}
}

/* ---------- guide page ---------- */
.guide{position:relative;z-index:10;max-width:820px;margin:0 auto;padding:140px clamp(20px,4vw,44px) 100px}
.guide h1{font-size:clamp(2.4rem,6vw,4.2rem);letter-spacing:-.04em;line-height:1;margin-bottom:22px;font-weight:500}
.guide .sub{color:var(--dim);font-size:1.1rem;margin-bottom:56px;max-width:60ch}
.guide h2{font-size:1.5rem;margin:52px 0 16px;letter-spacing:-.02em;font-weight:500}
.guide p{color:var(--dim);margin-bottom:16px;line-height:1.75}
.guide li{color:var(--dim);margin:0 0 10px 20px;line-height:1.7}
.guide code{
  font-family:'JetBrains Mono',monospace;font-size:.86em;
  background:rgba(77,226,255,.10);color:var(--cyan);padding:2px 7px;border-radius:3px;
}
.guide pre{
  background:rgba(6,9,18,.9);border:1px solid var(--edge-soft);border-left:2px solid var(--cyan);
  padding:22px 24px;border-radius:3px;overflow-x:auto;margin:20px 0 26px;
}
.guide pre code{background:none;color:var(--paper);padding:0;font-size:12.5px;line-height:1.7}
.guide .back{
  display:inline-block;margin-bottom:44px;color:var(--cyan);text-decoration:none;
  font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.14em;text-transform:uppercase;
}
.guide .back:hover{text-decoration:underline}

/* ---------- scroll progress ---------- */
.progress{
  position:fixed;top:0;left:0;height:2px;z-index:30;width:0%;
  background:linear-gradient(90deg,var(--cyan),var(--violet),var(--amber));
  box-shadow:0 0 14px rgba(77,226,255,.6);
  transition:width .12s linear;
}
/* ---------- section rail ---------- */
.rail{
  position:fixed;right:26px;top:50%;transform:translateY(-50%);z-index:20;
  display:flex;flex-direction:column;gap:16px;align-items:flex-end;
}
.rail a{
  display:flex;align-items:center;gap:10px;text-decoration:none;
  font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.2em;
  color:var(--dim);opacity:.45;transition:opacity .4s var(--ease),color .4s var(--ease);
}
.rail a i{display:block;width:18px;height:1px;background:currentColor;transition:width .4s var(--ease)}
.rail a span{opacity:0;transform:translateX(6px);transition:all .4s var(--ease)}
.rail a:hover,.rail a.on{opacity:1;color:var(--cyan)}
.rail a.on i{width:32px}
.rail a:hover span,.rail a.on span{opacity:1;transform:none}
@media(max-width:1100px){.rail{display:none}}