/* EtherLabXᵉ — Unified Design System */
:root{
  --void:#0A0A0F;
  --obsidian:#0B0A0E;
  --slate:#13131A;
  --pearl:#F0F0F5;
  --mist:#8A8A99;
  --ash:#4A4A5A;
  --platinum:#C8C8D8;
  --aurum:#E8D5A3;
  --aurum-deep:#C4B082;
  --champ-1:#F6EBCB;
  --champ-2:#D9BD86;
  --champ-3:#BE9C5C;
  --gold:linear-gradient(135deg,#F6EBCB 0%,#D9BD86 45%,#BE9C5C 100%);
  --glass-bg:linear-gradient(165deg,rgba(255,255,255,0.06),rgba(255,255,255,0.02));
  --ease-smooth:cubic-bezier(0.23,1,0.32,1);
  --ease-luxury:cubic-bezier(0.16,1,0.3,1);
  --ease-drawer:cubic-bezier(0.32,0.72,0,1);
  --mono:'Martian Mono',ui-monospace,monospace;
  --disp:'Syne',sans-serif;
  --body:'Hanken Grotesk',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--void);
  color:var(--pearl);
  font-family:var(--body);
  font-weight:400;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:var(--aurum);color:var(--void)}

/* Atmosphere */
.atmosphere{
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(ellipse 50% 45% at 85% 8%,rgba(200,200,216,0.10),transparent 60%),
    radial-gradient(ellipse 45% 40% at 15% 75%,rgba(232,213,163,0.06),transparent 55%),
    radial-gradient(ellipse 35% 30% at 50% 50%,rgba(200,200,216,0.04),transparent 50%);
  animation:atmosDrift 30s ease-in-out infinite alternate;
}
@keyframes atmosDrift{
  0%{transform:translate3d(0,0,0) scale(1) rotate(0deg)}
  50%{transform:translate3d(-1.5%,1%,0) scale(1.05) rotate(0.5deg)}
  100%{transform:translate3d(-2.5%,2%,0) scale(1.08) rotate(1deg)}
}

/* Grid */
.grid{
  position:fixed;
  inset:0;
  pointer-events:none;
  opacity:.06;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,0.04) 1px,transparent 1px);
  background-size:80px 80px;
  -webkit-mask-image:radial-gradient(ellipse 90% 90% at 50% 30%,#000 20%,transparent 80%);
  mask-image:radial-gradient(ellipse 90% 90% at 50% 30%,#000 20%,transparent 80%);
  animation:gridPulse 12s ease-in-out infinite;
}
@keyframes gridPulse{
  0%,100%{opacity:0.06;transform:scale(1)}
  50%{opacity:0.10;transform:scale(1.02)}
}

/* Grain */
.grain{
  position:fixed;
  inset:0;
  pointer-events:none;
  opacity:.03;
  mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Progress */
.progress{
  position:fixed;
  top:0;
  left:0;
  height:2px;
  width:100%;
  z-index:60;
  transform-origin:0 50%;
  transform:scaleX(0);
  background:linear-gradient(90deg,var(--champ-1),var(--champ-2),var(--champ-3),var(--champ-2),var(--champ-1));
  background-size:200% 100%;
  box-shadow:0 0 20px rgba(217,189,134,0.8),0 0 40px rgba(217,189,134,0.4);
  animation:progressShimmer 3s linear infinite;
}
@keyframes progressShimmer{
  0%{background-position:0% 50%}
  100%{background-position:200% 50%}
}

main{position:relative;z-index:2}
.wrap{max-width:1200px;margin:0 auto;padding:0 40px}

/* Glass */
.glass{
  background:var(--glass-bg);
  backdrop-filter:blur(32px) saturate(140%);
  -webkit-backdrop-filter:blur(32px) saturate(140%);
  border:1px solid rgba(255,255,255,0.10);
  border-radius:28px;
  box-shadow:
    0 40px 100px -30px rgba(0,0,0,0.7),
    0 20px 60px -20px rgba(0,0,0,0.5),
    inset 0 1px 0 rgba(255,255,255,0.20),
    inset 0 0 0 0.5px rgba(255,255,255,0.05);
  position:relative;
  overflow:hidden;
  transition:transform 0.8s var(--ease-luxury),border-color 0.8s,box-shadow 0.8s;
}
.glass::before{
  content:'';
  position:absolute;
  inset:0;
  border-radius:inherit;
  pointer-events:none;
  background:
    radial-gradient(140% 70% at 10% 0%,rgba(255,255,255,0.16),transparent 50%),
    radial-gradient(100% 50% at 90% 100%,rgba(232,213,163,0.08),transparent 40%);
}
.glass::after{
  content:'';
  position:absolute;
  inset:0;
  border-radius:inherit;
  pointer-events:none;
  opacity:0;
  transition:opacity 0.7s ease;
  mix-blend-mode:screen;
  background:radial-gradient(600px circle at var(--mx,50%) var(--my,50%),rgba(246,235,203,0.12),transparent 60%);
}
.glass:hover::after{opacity:1}
.glass:hover{
  transform:translateY(-8px) scale(1.01);
  border-color:rgba(217,189,134,0.30);
  box-shadow:
    0 50px 120px -30px rgba(0,0,0,0.8),
    0 30px 80px -20px rgba(217,189,134,0.15),
    inset 0 1px 0 rgba(255,255,255,0.25),
    inset 0 0 0 0.5px rgba(255,255,255,0.08);
}

/* Typography */
h1,h2,h3{font-family:var(--disp);line-height:1.05;letter-spacing:-0.03em}
.gold-text{
  background:var(--gold);
  background-size:200% auto;
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  animation:shimmer 8s linear infinite;
}
@keyframes shimmer{
  to{background-position:-200% center}
}
.eyebrow{
  font-family:var(--mono);
  font-weight:400;
  font-size:11px;
  letter-spacing:0.20em;
  text-transform:uppercase;
  color:var(--champ-2);
  display:inline-block;
}

/* Navigation */
nav{
  position:sticky;
  top:0;
  z-index:50;
  backdrop-filter:blur(24px) saturate(150%);
  -webkit-backdrop-filter:blur(24px) saturate(150%);
  background:rgba(10,10,15,0.65);
  border-bottom:1px solid rgba(255,255,255,0.06);
  transition:all 0.5s var(--ease-luxury);
}
nav.scrolled{
  background:rgba(10,10,15,0.85);
  box-shadow:0 16px 48px -24px rgba(0,0,0,0.9);
  border-color:rgba(255,255,255,0.12);
}
nav .row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
  transition:height 0.5s var(--ease-luxury);
}
nav.scrolled .row{height:60px}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  font-family:var(--disp);
  font-weight:700;
  font-size:20px;
  letter-spacing:-0.02em;
}
.brand .sup{font-size:0.5em;margin-left:1px}
.navlinks{display:flex;gap:32px;align-items:center}
.navlinks a{
  color:var(--mist);
  text-decoration:none;
  font-size:14px;
  font-weight:400;
  transition:all 0.4s var(--ease-luxury);
  position:relative;
}
.navlinks a::after{
  content:'';
  position:absolute;
  bottom:-6px;
  left:50%;
  width:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--aurum),transparent);
  transition:all 0.5s var(--ease-luxury);
  transform:translateX(-50%);
}
.navlinks a:hover{color:var(--pearl)}
.navlinks a:hover::after{width:120%}

/* Language Switcher */
.lang-switch{
  display:flex;
  gap:8px;
  align-items:center;
  margin-left:16px;
  padding-left:16px;
  border-left:1px solid rgba(255,255,255,0.1);
}
.lang-btn{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--mist);
  background:transparent;
  border:1px solid rgba(255,255,255,0.1);
  border-radius:6px;
  padding:6px 10px;
  cursor:pointer;
  transition:all 0.3s var(--ease-smooth);
}
.lang-btn:hover{color:var(--pearl);border-color:rgba(255,255,255,0.3)}
.lang-btn.active{
  color:var(--champ-1);
  border-color:rgba(217,189,134,0.4);
  background:rgba(217,189,134,0.08);
}

/* Buttons */
.btn{
  font-family:var(--body);
  font-weight:600;
  font-size:14px;
  text-decoration:none;
  padding:16px 32px;
  border-radius:18px;
  transition:all 0.3s var(--ease-smooth);
  display:inline-block;
  cursor:pointer;
  border:none;
  position:relative;
  overflow:hidden;
}
.btn:active{transform:scale(0.96)}
.btn-gold{
  background:var(--gold);
  color:#1a1508;
  box-shadow:0 8px 24px -8px rgba(217,189,134,0.4);
}
.btn-gold::after{
  content:'';
  position:absolute;
  top:0;
  left:-130%;
  width:60%;
  height:100%;
  transform:skewX(-22deg);
  background:linear-gradient(90deg,transparent,rgba(255,255,255,0.6),transparent);
  transition:none;
}
.btn-gold:hover::after{animation:sheen 1s ease}
@keyframes sheen{from{left:-130%}to{left:150%}}
.btn-gold:hover{
  filter:brightness(1.08);
  transform:translateY(-3px);
  box-shadow:0 16px 40px -12px rgba(217,189,134,0.6);
}
.btn-ghost{
  background:transparent;
  border:1px solid rgba(255,255,255,0.14);
  color:var(--pearl);
}
.btn-ghost:hover{
  border-color:rgba(232,213,163,0.45);
  color:var(--aurum);
  box-shadow:0 12px 32px -12px rgba(217,189,134,0.4);
  transform:translateY(-2px);
}

/* Hero */
.hero{
  padding:160px 0;
  text-align:center;
  position:relative;
}
.hero h1{
  font-size:clamp(52px,10vw,140px);
  font-weight:800;
  max-width:16ch;
  margin:0 auto;
  line-height:0.95;
}
.hero .sub{
  color:var(--mist);
  font-size:clamp(17px,2.2vw,22px);
  font-weight:300;
  max-width:60ch;
  margin:36px auto 0;
  line-height:1.7;
}
.hero .cta-row{
  display:flex;
  gap:16px;
  justify-content:center;
  margin-top:48px;
  flex-wrap:wrap;
}

/* Sections */
section{padding:160px 0}
.sec-head{margin-bottom:72px}
.sec-head h2{
  font-size:clamp(36px,5vw,64px);
  font-weight:700;
  margin:20px 0 16px;
}
.sec-head .lead{
  color:var(--mist);
  font-size:clamp(16px,2vw,20px);
  font-weight:300;
  max-width:64ch;
  line-height:1.7;
}

/* Footer */
footer{
  border-top:1px solid rgba(255,255,255,0.06);
  padding:48px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}
footer .meta{
  font-family:var(--mono);
  font-weight:300;
  font-size:12px;
  color:var(--ash);
  letter-spacing:0.08em;
}

/* Reveal */
.reveal{
  opacity:0;
  transform:translateY(50px);
  transition:opacity 1.2s var(--ease-luxury),transform 1.2s var(--ease-luxury);
  transition-delay:var(--d,0ms);
}
.reveal.in{
  opacity:1;
  transform:none;
}

/* Responsive */
@media(max-width:768px){
  .wrap{padding:0 24px}
  .navlinks{display:none}
  .lang-switch{margin-left:auto;padding-left:12px}
  section{padding:100px 0}
  .hero{padding:100px 0}
}

@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .atmosphere,.grid,.gold-text,.progress{animation:none}
  *{scroll-behavior:auto}
}