*, *::before, *::after { box-sizing: border-box; }
:root {
  --bg: #05070d;
  --fg: #eef2f8;
  --muted: #8a95ab;
  --primary: #22d3ee;
  --accent: #34e0a1;
  --border: rgba(255,255,255,0.08);
  --card: rgba(255,255,255,0.03);
}
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: "DM Sans", system-ui, sans-serif;
  overflow-x: hidden;
  min-height: 100vh;
}
#particles {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
}
main, .site-header, footer { position: relative; z-index: 1; }

.site-header {
  display: flex; justify-content: space-between; align-items: center;
  max-width: 1200px; margin: 0 auto; padding: 24px 32px;
}
.logo {
  font-family: "Orbitron", sans-serif; font-weight: 900;
  letter-spacing: 0.2em; font-size: 18px;
}
.logo span { color: var(--primary); }
nav a {
  color: var(--muted); text-decoration: none; margin-left: 32px;
  font-size: 14px; font-weight: 500; transition: color .2s;
}
nav a:hover { color: var(--fg); }

.hero {
  text-align: center; padding: 80px 24px 120px;
  max-width: 900px; margin: 0 auto;
  background: radial-gradient(circle at 50% 0%, rgba(34,211,238,0.12), transparent 60%);
}
.hero h1 {
  font-family: "Orbitron", sans-serif; font-weight: 900;
  font-size: clamp(2.5rem, 7vw, 6rem);
  line-height: 0.95; margin: 0;
}
.glow {
  color: var(--primary);
  text-shadow: 0 0 20px rgba(34,211,238,0.6), 0 0 40px rgba(34,211,238,0.4), 0 0 80px rgba(34,211,238,0.2);
}
.hero p {
  color: var(--muted); font-size: 1.2rem; max-width: 620px;
  margin: 24px auto 0;
}
.cta { margin-top: 40px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 14px 28px; border-radius: 10px;
  text-decoration: none; font-weight: 600; font-size: 15px;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.btn-primary {
  background: var(--primary); color: #05070d;
  box-shadow: 0 0 20px rgba(34,211,238,0.4), 0 0 40px rgba(34,211,238,0.2);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(34,211,238,0.6), 0 0 60px rgba(34,211,238,0.3); }
.btn-outline {
  border: 1px solid rgba(34,211,238,0.4); color: var(--fg);
}
.btn-outline:hover { background: rgba(34,211,238,0.1); border-color: rgba(34,211,238,0.7); }

.about {
  max-width: 1100px; margin: 0 auto; padding: 80px 32px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
}
.about h2 {
  font-family: "Orbitron", sans-serif; font-size: 2rem; margin: 0 0 16px;
}
.about p { color: var(--muted); line-height: 1.7; }
.about-visual {
  aspect-ratio: 1; border-radius: 20px;
  background:
    radial-gradient(circle at 30% 30%, rgba(34,211,238,0.6), transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(52,224,161,0.4), transparent 60%),
    linear-gradient(135deg, #0a1220, #050810);
  border: 1px solid var(--border);
  box-shadow: 0 0 60px rgba(34,211,238,0.15);
}
@media (max-width: 768px) {
  .about { grid-template-columns: 1fr; }
}

.features {
  max-width: 1100px; margin: 0 auto; padding: 80px 32px;
  text-align: center;
}
.features h2 {
  font-family: "Orbitron", sans-serif; font-size: 2rem; margin: 0;
}
.features .sub { color: var(--muted); margin-top: 12px; }
.grid {
  margin-top: 48px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.card {
  background: var(--card); border: 1px solid var(--border);
  padding: 24px; border-radius: 14px; text-align: left;
  transition: transform .2s, border-color .2s, box-shadow .2s;
  backdrop-filter: blur(6px);
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(34,211,238,0.4);
  box-shadow: 0 0 30px rgba(34,211,238,0.15);
}
.card h3 {
  font-family: "Orbitron", sans-serif; margin: 0 0 8px; font-size: 1.05rem;
}
.card p { color: var(--muted); margin: 0; font-size: 0.95rem; line-height: 1.6; }

footer {
  border-top: 1px solid var(--border);
  padding: 40px 32px; text-align: center;
}
footer p { color: var(--muted); margin: 8px 0 0; font-size: 14px; }

html { scroll-behavior: smooth; }