/* =========================================================
   CryptoSim — Design Tokens
========================================================= */
:root{
  --bg-0:#0B1020;
  --bg-1:#111827;
  --bg-2:#151B2F;
  --gold:#F5A623;
  --gold-soft:rgba(245,166,35,.14);
  --cyan:#00D4FF;
  --cyan-soft:rgba(0,212,255,.14);
  --text-hi:#F5F7FA;
  --text-lo:#9AA4B8;
  --border:rgba(255,255,255,.08);
  --border-hi:rgba(255,255,255,.16);
  --glass:rgba(255,255,255,.04);

  --font-main:'Calibri','Segoe UI',system-ui,-apple-system,sans-serif;

  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:22px;

  --shadow-soft:0 10px 30px rgba(0,0,0,.35);
  --shadow-lift:0 20px 50px rgba(0,0,0,.45);

  --ease:cubic-bezier(.22,1,.36,1);
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg-0);
  color:var(--text-hi);
  font-family:var(--font-main);
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
img,svg{display:block;}
button{font-family:inherit;border:none;background:none;cursor:pointer;}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

::selection{background:var(--gold-soft);color:var(--gold);}

.accent-gold{color:var(--gold);}
.accent-cyan{color:var(--cyan);}

.section-container{
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}

/* =========================================================
   Reveal animation
========================================================= */
[data-animate]{
  opacity:0;
  transform:translateY(28px);
  transition:opacity .8s var(--ease), transform .8s var(--ease);
}
[data-animate].in-view{
  opacity:1;
  transform:translateY(0);
}

/* =========================================================
   Navbar
========================================================= */
.navbar{
  position:fixed;
  top:0; left:0; right:0;
  z-index:100;
  padding:20px 0;
  transition:background .35s var(--ease), padding .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s var(--ease);
  border-bottom:1px solid transparent;
}
.navbar.scrolled{
  background:rgba(11,16,32,.78);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--border);
  padding:14px 0;
}
.nav-container{
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.nav-logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:1.15rem;
  letter-spacing:.2px;
}
.logo-mark{
  color:var(--cyan);
  display:flex;
  filter:drop-shadow(0 0 8px rgba(0,212,255,.45));
}
.logo-text{color:var(--text-hi);}

.nav-links{
  display:flex;
  align-items:center;
  gap:36px;
}
.nav-links a{
  font-size:.92rem;
  color:var(--text-lo);
  position:relative;
  padding:4px 0;
  transition:color .25s ease;
}
.nav-links a::after{
  content:'';
  position:absolute;
  left:0; bottom:-2px;
  width:0; height:1.5px;
  background:linear-gradient(90deg,var(--gold),var(--cyan));
  transition:width .3s var(--ease);
}
.nav-links a:hover{color:var(--text-hi);}
.nav-links a:hover::after{width:100%;}

.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  width:26px;
}
.nav-toggle span{
  height:2px;
  width:100%;
  background:var(--text-hi);
  border-radius:2px;
  transition:transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* =========================================================
   Hero
========================================================= */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:140px 32px 100px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  z-index:0;
}
#gridCanvas{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  opacity:.35;
}
.glow{
  position:absolute;
  border-radius:50%;
  filter:blur(90px);
  pointer-events:none;
}
.glow-blue{
  width:520px;height:520px;
  background:radial-gradient(circle, rgba(0,212,255,.30), transparent 70%);
  top:-120px; left:-120px;
  animation:float-a 14s ease-in-out infinite;
}
.glow-gold{
  width:460px;height:460px;
  background:radial-gradient(circle, rgba(245,166,35,.22), transparent 70%);
  bottom:-140px; right:-100px;
  animation:float-b 16s ease-in-out infinite;
}
@keyframes float-a{
  0%,100%{transform:translate(0,0);}
  50%{transform:translate(40px,30px);}
}
@keyframes float-b{
  0%,100%{transform:translate(0,0);}
  50%{transform:translate(-30px,-40px);}
}
.blur-shape{
  position:absolute;
  border:1px solid var(--border-hi);
  border-radius:28px;
  opacity:.5;
}
.shape-1{
  width:180px;height:180px;
  top:18%; right:12%;
  transform:rotate(18deg);
  animation:drift 10s ease-in-out infinite;
}
.shape-2{
  width:120px;height:120px;
  bottom:16%; left:9%;
  transform:rotate(-12deg);
  animation:drift 12s ease-in-out infinite reverse;
}
@keyframes drift{
  0%,100%{transform:translateY(0) rotate(18deg);}
  50%{transform:translateY(-18px) rotate(22deg);}
}
.particles{
  position:absolute;
  inset:0;
  pointer-events:none;
}
.particle{
  position:absolute;
  width:3px;height:3px;
  border-radius:50%;
  background:var(--cyan);
  opacity:.6;
  box-shadow:0 0 6px rgba(0,212,255,.8);
  animation:rise linear infinite;
}
@keyframes rise{
  from{transform:translateY(0); opacity:0;}
  10%{opacity:.7;}
  90%{opacity:.4;}
  to{transform:translateY(-100vh); opacity:0;}
}

.hero-content{
  position:relative;
  z-index:2;
  max-width:760px;
  text-align:center;
  margin:0 auto;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 16px;
  border-radius:999px;
  border:1px solid var(--border-hi);
  background:var(--glass);
  backdrop-filter:blur(10px);
  font-size:.72rem;
  letter-spacing:1.6px;
  color:var(--cyan);
  font-weight:600;
  margin-bottom:28px;
}
.badge-dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 8px var(--cyan);
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1; transform:scale(1);}
  50%{opacity:.4; transform:scale(1.3);}
}
.hero-title{
  font-size:clamp(2.4rem, 5.4vw, 4.3rem);
  font-weight:800;
  line-height:1.1;
  letter-spacing:-1px;
  margin-bottom:22px;
}
.hero-subtitle{
  font-size:clamp(1rem, 1.6vw, 1.15rem);
  color:var(--text-lo);
  max-width:600px;
  margin:0 auto 40px;
}
.hero-actions{
  display:flex;
  gap:16px;
  justify-content:center;
  flex-wrap:wrap;
  margin-bottom:60px;
}
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px 26px;
  border-radius:12px;
  font-size:.95rem;
  font-weight:600;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease);
  overflow:hidden;
}
.btn-primary{
  background:linear-gradient(135deg, var(--gold), #ffbf4d);
  color:#161006;
  box-shadow:0 8px 26px rgba(245,166,35,.28);
}
.btn-primary:hover{
  transform:translateY(-3px);
  box-shadow:0 14px 34px rgba(245,166,35,.4);
}
.btn-secondary{
  background:var(--glass);
  border:1px solid var(--border-hi);
  color:var(--text-hi);
  backdrop-filter:blur(10px);
}
.btn-secondary:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  transform:translateY(-3px);
  box-shadow:0 10px 26px rgba(0,212,255,.18);
}
.btn::after{
  content:'';
  position:absolute;
  inset:0;
  border-radius:inherit;
  background:radial-gradient(circle, rgba(255,255,255,.5), transparent 60%);
  opacity:0;
  transform:scale(0);
  transition:transform .5s ease, opacity .5s ease;
}
.btn:active::after{
  opacity:.35;
  transform:scale(2.2);
  transition:0s;
}

.hero-stats{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:28px;
}
.stat{display:flex;flex-direction:column;align-items:center;gap:4px;}
.stat-value{font-size:1.4rem;font-weight:700;color:var(--text-hi);}
.stat-label{font-size:.72rem;letter-spacing:.6px;color:var(--text-lo);text-transform:uppercase;}
.stat-divider{width:1px;height:32px;background:var(--border-hi);}

.scroll-indicator{
  position:absolute;
  bottom:28px; left:50%;
  transform:translateX(-50%);
  width:26px;height:42px;
  border:2px solid var(--border-hi);
  border-radius:14px;
  z-index:2;
}
.scroll-indicator span{
  position:absolute;
  top:8px; left:50%;
  transform:translateX(-50%);
  width:4px;height:8px;
  border-radius:2px;
  background:var(--cyan);
  animation:scroll-dot 1.8s ease-in-out infinite;
}
@keyframes scroll-dot{
  0%{opacity:1; top:8px;}
  70%{opacity:0; top:20px;}
  100%{opacity:0; top:8px;}
}

/* =========================================================
   Section heads (shared)
========================================================= */
.section-head{
  max-width:660px;
  margin:0 auto 56px;
  text-align:center;
}
.eyebrow{
  display:inline-block;
  font-size:.74rem;
  letter-spacing:2.2px;
  text-transform:uppercase;
  color:var(--gold);
  font-weight:700;
  margin-bottom:14px;
}
.section-title{
  font-size:clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight:800;
  letter-spacing:-.5px;
  margin-bottom:16px;
}
.section-desc{
  color:var(--text-lo);
  font-size:1rem;
}

section{
  position:relative;
  padding:110px 0;
}

/* =========================================================
   About
========================================================= */
.about{background:var(--bg-1);}
.about-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.about-card{
  padding:26px 22px;
  border-radius:var(--radius-md);
  background:var(--glass);
  border:1px solid var(--border);
  transition:transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
}
.about-card:hover{
  transform:translateY(-6px);
  border-color:var(--cyan);
  box-shadow:0 16px 34px rgba(0,0,0,.35);
}
.about-card-tag{
  display:inline-block;
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.6px;
  color:var(--cyan);
  border:1px solid rgba(0,212,255,.35);
  background:var(--cyan-soft);
  padding:5px 12px;
  border-radius:999px;
  margin-bottom:14px;
}
.about-card p{
  color:var(--text-lo);
  font-size:.92rem;
}

/* =========================================================
   Algorithm cards
========================================================= */
.algorithms{background:var(--bg-0);}
.algo-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:26px;
}
.algo-card{
  position:relative;
  padding:32px;
  border-radius:var(--radius-lg);
  background:linear-gradient(180deg, var(--glass), rgba(255,255,255,.015));
  border:1px solid var(--border);
  backdrop-filter:blur(10px);
  transition:transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
  display:flex;
  flex-direction:column;
}
.algo-card::before{
  content:'';
  position:absolute;
  inset:-1px;
  border-radius:inherit;
  padding:1px;
  background:linear-gradient(135deg, transparent 40%, rgba(0,212,255,0));
  -webkit-mask:linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  opacity:0;
  transition:opacity .4s ease;
  pointer-events:none;
}
.algo-card:hover{
  transform:translateY(-8px);
  border-color:rgba(0,212,255,.55);
  box-shadow:0 22px 50px rgba(0,0,0,.4), 0 0 40px rgba(0,212,255,.12);
}
.algo-card-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:20px;
}
.algo-icon{
  color:var(--cyan);
  display:flex;
  padding:10px;
  border-radius:12px;
  background:var(--cyan-soft);
}
.algo-badge{
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.8px;
  color:var(--gold);
  background:var(--gold-soft);
  border:1px solid rgba(245,166,35,.35);
  padding:5px 12px;
  border-radius:999px;
}
.algo-title{
  font-size:1.28rem;
  font-weight:700;
  margin-bottom:8px;
}
.algo-desc{
  color:var(--text-lo);
  font-size:.9rem;
  margin-bottom:22px;
}
.algo-specs{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:12px;
  padding:16px;
  border-radius:12px;
  background:rgba(0,0,0,.2);
  border:1px solid var(--border);
  margin-bottom:22px;
}
.spec{display:flex;flex-direction:column;gap:3px;text-align:center;}
.spec-label{font-size:.68rem;color:var(--text-lo);text-transform:uppercase;letter-spacing:.5px;}
.spec-value{font-size:.98rem;font-weight:700;color:var(--text-hi);}

.algo-features{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:9px 14px;
  margin-bottom:26px;
  flex:1;
}
.algo-features li{
  font-size:.84rem;
  color:var(--text-lo);
  display:flex;
  align-items:center;
  gap:8px;
}
.algo-features li::before{
  content:'';
  width:6px;height:6px;
  flex:none;
  border-radius:50%;
  background:var(--gold);
  box-shadow:0 0 6px rgba(245,166,35,.7);
}
.algo-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px;
  border-radius:12px;
  border:1px solid var(--border-hi);
  font-weight:600;
  font-size:.92rem;
  color:var(--text-hi);
  transition:background .3s ease, border-color .3s ease, color .3s ease, transform .3s ease;
}
.algo-btn svg{transition:transform .3s var(--ease);}
.algo-btn:hover{
  background:linear-gradient(135deg, var(--gold), #ffbf4d);
  color:#161006;
  border-color:transparent;
}
.algo-btn:hover svg{transform:translateX(4px);}

/* =========================================================
   Flow / How It Works
========================================================= */
.flow{background:var(--bg-1);}
.flow-track{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:0;
  position:relative;
}
.flow-step{
  display:flex;
  align-items:center;
  gap:14px;
  padding:14px 20px;
  border-radius:14px;
  background:var(--glass);
  border:1px solid var(--border);
  transition:border-color .3s ease, transform .3s ease;
}
.flow-step:hover{
  border-color:var(--cyan);
  transform:translateY(-4px);
}
.flow-index{
  font-size:.78rem;
  font-weight:800;
  color:var(--bg-0);
  background:linear-gradient(135deg,var(--gold),var(--cyan));
  width:28px;height:28px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  flex:none;
}
.flow-label{font-size:.88rem;font-weight:600;white-space:nowrap;}
.flow-track > .flow-step:not(:last-child)::after{
  content:'';
  display:none;
}
.flow-track{gap:10px;}
.flow-track .flow-step + .flow-step{position:relative;}
.flow-connector{
  color:var(--border-hi);
  display:flex;
  align-items:center;
}

/* =========================================================
   Features
========================================================= */
.features{background:var(--bg-0);}
.features-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:22px;
}
.feature-card{
  padding:28px 24px;
  border-radius:var(--radius-md);
  background:var(--glass);
  border:1px solid var(--border);
  transition:transform .35s var(--ease), border-color .35s ease, box-shadow .35s ease;
}
.feature-card:hover{
  transform:translateY(-6px);
  border-color:var(--gold);
  box-shadow:0 16px 34px rgba(0,0,0,.35);
}
.feature-icon{
  color:var(--gold);
  display:inline-flex;
  padding:12px;
  border-radius:12px;
  background:var(--gold-soft);
  margin-bottom:18px;
}
.feature-card h3{
  font-size:1.05rem;
  margin-bottom:8px;
}
.feature-card p{
  font-size:.86rem;
  color:var(--text-lo);
}

/* =========================================================
   Technology
========================================================= */
.technology{background:var(--bg-1);}
.tech-row{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:14px;
}
.tech-pill{
  padding:12px 22px;
  border-radius:999px;
  border:1px solid var(--border-hi);
  background:var(--glass);
  font-size:.88rem;
  font-weight:600;
  color:var(--text-hi);
  transition:border-color .3s ease, color .3s ease, transform .3s ease;
}
.tech-pill:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  transform:translateY(-3px);
}

/* =========================================================
   Footer
========================================================= */
.footer{
  background:var(--bg-2);
  border-top:1px solid var(--border);
  padding:70px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:50px;
}
.footer-brand p{
  color:var(--text-lo);
  font-size:.86rem;
  margin-top:12px;
}
.footer-col h4{
  font-size:.82rem;
  letter-spacing:.8px;
  text-transform:uppercase;
  color:var(--text-lo);
  margin-bottom:16px;
}
.footer-col{display:flex;flex-direction:column;gap:10px;}
.footer-col a{
  font-size:.9rem;
  color:var(--text-hi);
  opacity:.8;
  transition:opacity .25s ease, color .25s ease;
  width:fit-content;
}
.footer-col a:hover{opacity:1;color:var(--cyan);}
.footer-bottom{
  border-top:1px solid var(--border);
  padding:22px 32px;
  text-align:center;
}
.footer-bottom p{
  font-size:.82rem;
  color:var(--text-lo);
}

/* =========================================================
   Responsive
========================================================= */
@media (max-width: 1024px){
  .about-grid{grid-template-columns:repeat(2,1fr);}
  .algo-grid{grid-template-columns:1fr;}
  .features-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width: 768px){
  .nav-links{
    position:fixed;
    top:0; right:0;
    height:100vh;
    width:min(78vw,320px);
    background:rgba(11,16,32,.98);
    backdrop-filter:blur(20px);
    flex-direction:column;
    align-items:flex-start;
    justify-content:center;
    gap:30px;
    padding:40px;
    transform:translateX(100%);
    transition:transform .4s var(--ease);
    border-left:1px solid var(--border);
  }
  .nav-links.open{transform:translateX(0);}
  .nav-toggle{display:flex;}

  .hero{padding-top:120px;}
  .hero-stats{gap:16px;}
  .stat-divider{height:26px;}

  .about-grid{grid-template-columns:1fr 1fr;}
  .algo-features{grid-template-columns:1fr;}
  .features-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  section{padding:80px 0;}
}

@media (max-width: 480px){
  .about-grid{grid-template-columns:1fr;}
  .section-container{padding:0 20px;}
  .nav-container{padding:0 20px;}
  .hero{padding:120px 20px 80px;}
  .algo-card{padding:24px;}
}