/* Reset & Variables */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary-orange:#FF6B35;
  --primary-blue:#003B6F;
  --accent-green:#39FF14;
  --bg-light:#F8F9FA;
  --bg-dark:#1A1A2E;
  --text-dark:#1E1E1E;
  --text-light:#FFFFFF;
  --card-glass:rgba(255,255,255,0.15);
  --data-highlight:#FFD700;
  --font-head:'Inter',sans-serif;
  --font-body:'Inter',sans-serif;
  --font-mono:'JetBrains Mono',monospace;
  --base-size:16px;
  --max-width:1200px;
  --nav-height:64px;
  --glass-blur:12px;
}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  font-size:var(--base-size);
  line-height:1.5;
  color:var(--text-dark);
  background:var(--bg-light);
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary-blue);text-decoration:none}
a:hover{color:var(--primary-orange)}
a:focus-visible{outline:3px solid var(--primary-orange);outline-offset:2px}
img{max-width:100%;height:auto;display:block}
.skip-link{
  position:absolute;top:-100px;left:0;z-index:9999;
  background:var(--primary-orange);color:var(--text-light);padding:8px 16px;
  border-radius:0 0 8px 0;font-weight:bold;
}
.skip-link:focus{top:0}
/* Header */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(26,26,46,0.85);backdrop-filter:blur(var(--glass-blur));
  -webkit-backdrop-filter:blur(var(--glass-blur));
  border-bottom:1px solid rgba(255,255,255,0.1);
  transition:background 0.3s,box-shadow 0.3s;
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  max-width:var(--max-width);margin:0 auto;padding:0 24px;height:var(--nav-height);
}
.logo{
  font-family:var(--font-head);font-size:1.75rem;font-weight:800;
  color:var(--primary-orange);letter-spacing:-0.02em;
}
.logo:hover{color:var(--accent-green)}
.nav-toggle{
  display:none;background:none;border:none;cursor:pointer;
  flex-direction:column;gap:5px;padding:8px;
}
.nav-toggle-line{
  display:block;width:28px;height:3px;background:var(--text-light);
  border-radius:2px;transition:transform 0.3s,opacity 0.3s;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
.nav-list{display:flex;gap:8px;list-style:none}
.nav-list a{
  display:block;padding:8px 16px;
  border-radius:100px;font-weight:600;font-size:0.95rem;
  color:var(--text-light);transition:background 0.2s,color 0.2s;
}
.nav-list a:hover,.nav-list a[aria-current="page"]{
  background:var(--primary-orange);color:var(--text-light);
}
.header-cta{
  background:var(--primary-orange);color:var(--text-light);
  padding:10px 20px;border-radius:100px;font-weight:700;
  transition:background 0.2s,transform 0.2s;
}
.header-cta:hover{background:#e55a2b;transform:scale(1.03)}
/* Reading Progress */
.reading-progress{
  position:absolute;bottom:-2px;left:0;height:3px;
  background:linear-gradient(90deg,var(--accent-green),var(--primary-orange));
  width:0%;transition:width 0.1s linear;
}
/* Footer */
.site-footer{
  background:var(--bg-dark);color:var(--text-light);
  padding:48px 24px 24px;
}
.footer-inner{
  max-width:var(--max-width);margin:0 auto;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px;
}
.footer-brand{flex:1 1 300px}
.footer-logo{
  font-family:var(--font-head);font-size:1.5rem;font-weight:800;
  color:var(--primary-orange);margin-bottom:8px;
}
.footer-icp,.footer-contact,.footer-note{font-size:0.85rem;opacity:0.8;margin-top:4px}
.footer-links{display:flex;gap:16px;align-items:flex-start}
.footer-links a{color:var(--text-light);font-size:0.9rem;border-bottom:1px solid transparent}
.footer-links a:hover{border-color:var(--primary-orange);color:var(--primary-orange)}
/* Base Components */
.glass-card{
  background:var(--card-glass);backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,0.2);
  border-radius:16px;padding:24px;
}
.btn-primary{
  display:inline-block;background:var(--primary-orange);color:var(--text-light);
  padding:12px 28px;border-radius:100px;font-weight:700;
  border:none;cursor:pointer;transition:background 0.2s,transform 0.1s;
  font-family:var(--font-head);font-size:1rem;
}
.btn-primary:hover{background:#e55a2b;transform:translateY(-2px)}
.btn-primary:focus-visible{outline:3px solid var(--accent-green)}
.btn-outline{
  display:inline-block;background:transparent;color:var(--primary-blue);
  border:2px solid var(--primary-blue);padding:10px 26px;
  border-radius:100px;font-weight:600;cursor:pointer;transition:all 0.2s;
  font-family:var(--font-head);font-size:1rem;
}
.btn-outline:hover{background:var(--primary-blue);color:var(--text-light)}
.section-highlight{color:var(--accent-green);font-weight:700}
.split-hero{display:flex;flex-wrap:wrap;min-height:80vh;align-items:center}
.split-hero > *{flex:1 1 50%;padding:24px}
.particle-bg{position:relative;overflow:hidden}
/* Responsive */
@media (max-width:768px){
  .header-inner{padding:0 16px}
  .nav-toggle{display:flex}
  .nav{
    position:absolute;top:var(--nav-height);left:0;right:0;
    background:rgba(26,26,46,0.95);backdrop-filter:blur(12px);
    max-height:0;overflow:hidden;transition:max-height 0.4s ease;
  }
  .nav[data-open]{max-height:500px}
  .nav-list{flex-direction:column;padding:16px 24px}
  .nav-list a{padding:12px 16px}
  .header-cta{display:none}
  .split-hero > *{flex:1 1 100%}
  .footer-inner{flex-direction:column}
}
@media (max-width:480px){
  .logo{font-size:1.4rem}
}
/* Accessibility */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:0.01ms !important;animation-duration:0.01ms !important}
  html{scroll-behavior:auto}
}