:root{
  --black:#000; --off:#0b0b0b; --charcoal:#111; --mid:#1a1a1a; --line:rgba(255,255,255,.1); --text:#fff; --muted:rgba(255,255,255,.7);
  --radius:18px; --radius-lg:22px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--black);color:var(--text);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif}
html{scroll-behavior:smooth}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1120px;margin:0 auto;padding:0 1rem}
.border{border:1px solid var(--line)}
.card{background:#0f0f0f;border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem}
.pill{display:inline-block;padding:.35rem .6rem;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.06);font-size:.78rem;color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.9rem 1.1rem;border-radius:16px;border:1px solid var(--line);background:#fff;color:#000;font-weight:600;transition:all 0.3s ease}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(255,255,255,0.15)}
.btn.secondary{background:transparent;color:#fff}
.btn.secondary:hover{background:rgba(255,255,255,.08)}
header{position:sticky;top:0;z-index:20;backdrop-filter:saturate(1.2) blur(6px);background:rgba(0,0,0,.5);border-bottom:1px solid var(--line);transition:all 0.3s ease}
/* Desktop Navigation */
nav{display:flex;align-items:center}
nav a{font-size:.95rem;color:rgba(255,255,255,.8);margin-left:1rem;transition:all 0.3s ease;position:relative}
nav a:hover{color:#fff;transform:translateY(-1px)}
nav a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:#fff;transition:width 0.3s ease}
nav a:hover::after{width:100%}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle{display:none;flex-direction:column;justify-content:space-around;width:40px;height:40px;background:transparent;border:none;cursor:pointer;padding:8px;z-index:1001;position:relative;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.mobile-menu-toggle span{width:100%;height:3px;background:#fff;border-radius:2px;transition:all 0.3s ease;transform-origin:center;display:block;pointer-events:none}
.mobile-menu-toggle.active span:nth-child(1){transform:rotate(45deg) translate(6px,6px)}
.mobile-menu-toggle.active span:nth-child(2){opacity:0}
.mobile-menu-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(6px,-6px)}

/* Mobile Navigation Overlay */
.mobile-nav{display:none;position:fixed;top:0;left:0;right:0;background:rgba(0,0,0,0.98);backdrop-filter:blur(20px);z-index:1000;flex-direction:column;justify-content:center;align-items:center;gap:2rem;opacity:0;visibility:hidden;transition:all 0.4s ease;min-height:100vh}
.mobile-nav.show{opacity:1;visibility:visible}
.mobile-nav a{font-size:1.5rem;color:#fff;text-decoration:none;padding:1.5rem;border-radius:12px;transition:all 0.3s ease;min-width:250px;text-align:center;display:block;width:100%;max-width:350px;font-weight:500}
.mobile-nav a:hover{background:rgba(255,255,255,0.1);transform:translateY(-3px);box-shadow:0 10px 30px rgba(0,0,0,0.3)}
.mobile-nav a.btn{background:#fff;color:#000;font-weight:600;padding:1.5rem 2rem;border-radius:16px}

/* Mobile Responsive */
@media (max-width:768px){
  nav{display:none}
  .mobile-menu-toggle{display:flex}
  .mobile-nav{display:flex}
}
.section{padding:5rem 0;border-top:1px solid var(--line)}
.section.gradient{background:linear-gradient(to bottom,var(--black),var(--off))}
.h1{font-size:clamp(2.2rem,5vw,3.6rem);line-height:1.1;margin:.5rem 0}
.h2{font-size:clamp(1.6rem,3.5vw,2.1rem);margin:0 0 1rem}
.muted{color:var(--muted)}
.grid{display:grid;gap:1rem}
@media(min-width:768px){.grid-2{grid-template-columns:1fr 1fr}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-5{grid-template-columns:repeat(5,1fr)}}
.hero-box{position:relative;border-radius:24px;overflow:hidden}
.hero-box .mesh{position:absolute;inset:0;background:radial-gradient(60% 40% at 50% -10%,rgba(255,255,255,.08),transparent)}
.mesh-grid{position:absolute;inset:0;opacity:.2;display:grid;grid-template-columns:repeat(6,1fr);grid-template-rows:repeat(4,1fr)}
.mesh-grid div{border:1px solid var(--line)}
.list{display:flex;flex-wrap:wrap;gap:.75rem 1.5rem;font-size:.95rem;color:rgba(255,255,255,.7)}
.stat{border:1px solid var(--line);border-radius:var(--radius);padding:1rem;text-align:center;transition:all 0.3s ease}
.stat:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(0,0,0,0.3)}
.stack-tag{display:inline-block;padding:.4rem .7rem;border-radius:999px;background:rgba(255,255,255,.08);font-size:.86rem;transition:all 0.3s ease}
.stack-tag:hover{background:rgba(255,255,255,.15);transform:translateY(-2px)}
.skip{position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip:focus{left:1rem;top:4.5rem;width:auto;height:auto;background:#fff;color:#000;padding:.5rem .75rem;border-radius:10px}
footer{border-top:1px solid var(--line)}
/* Enhanced reveal animations */
.reveal{opacity:0;transform:translateY(30px);transition:opacity 0.8s ease,transform 0.8s ease}
.reveal.show{opacity:1;transform:translateY(0)}
.reveal:nth-child(1){transition-delay:0.1s}
.reveal:nth-child(2){transition-delay:0.2s}
.reveal:nth-child(3){transition-delay:0.3s}
.reveal:nth-child(4){transition-delay:0.4s}
.reveal:nth-child(5){transition-delay:0.5s}
.logo{display:flex;align-items:center;gap:.5rem}
.logo svg{color:#fff}
.badge{position:absolute;left:.75rem;bottom:.75rem;background:#fff;color:#000;border-radius:999px;font-size:.75rem;padding:.2rem .5rem}
/* Card hover effects */
.card{transition:all 0.3s ease}
.card:hover{transform:translateY(-4px);box-shadow:0 15px 40px rgba(0,0,0,0.3)}
/* Smooth scroll offset for fixed header */
section[id]{scroll-margin-top:80px}

/* Loading animation */
body:not(.loaded) * {
  opacity: 0;
  transform: translateY(20px);
}

body.loaded * {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* Enhanced button animations */
.btn {
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

/* Scroll progress indicator */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, #fff, #888);
  z-index: 1000;
  transition: width 0.1s ease;
}

/* Back to top button */
.back-to-top {
  position: fixed !important;
  bottom: 30px !important;
  right: 30px !important;
  width: 50px !important;
  height: 50px !important;
  background: rgba(255, 255, 255, 0.1) !important;
  border: 1px solid var(--line) !important;
  border-radius: 50% !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  cursor: pointer !important;
  opacity: 1 !important;
  visibility: visible !important;
  transform: translateY(20px) !important;
  transition: all 0.3s ease !important;
  z-index: 1000 !important;
  backdrop-filter: blur(10px) !important;
  margin: 0 !important;
  padding: 0 !important;
  box-sizing: border-box !important;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  color: #fff;
  transition: transform 0.3s ease;
}

.back-to-top:hover svg {
  transform: translateY(-2px);
}

/* Mobile responsive */
@media (max-width: 768px) {
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
  
  .back-to-top svg {
    width: 18px;
    height: 18px;
  }
}