@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');
:root {
  --bg:#0f1226;
  --fg:#E8ECF1;
  --muted:#93A1B1;
  --primary:#7C5CFF;
  --accent:#06D6A0;
  --card:#15193A;
  --shadow:rgba(0,0,0,0.45);
}
* { box-sizing:border-box; }
html, body {
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--fg);
  font-family:'Poppins', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}
.container {
  width:min(1200px,92%);
  margin:0 auto;
}
a {
  color:var(--fg);
  text-decoration:none;
  opacity:.9;
}
a:hover { opacity:1; }
.topbar {
  position:sticky;
  top:0;
  backdrop-filter:blur(6px);
  background:linear-gradient(180deg,rgba(13,16,35,.8),rgba(13,16,35,.2));
  z-index:10;
  box-shadow:0 10px 30px var(--shadow);
}
.nav {
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 0;
}
.logo {
  font-weight:700;
  letter-spacing:.5px;
}
.logo span { color:var(--accent); }
.menu { display:flex; gap:22px; }
.hero {
  padding:90px 0 40px;
  background:
    radial-gradient(1200px 600px at 20% -10%, rgba(124,92,255,.35), transparent 60%),
    radial-gradient(900px 600px at 100% 0%, rgba(6,214,160,.25), transparent 60%);
}
.hero-inner {
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
}
.hero h1 {
  font-size:clamp(28px,4vw,56px);
  line-height:1.05;
  margin:0 0 10px;
}
.hero p {
  font-size:clamp(16px,1.8vw,22px);
  color:var(--muted);
}
.cta {
  display:inline-block;
  margin-top:18px;
  background:var(--primary);
  padding:14px 20px;
  border-radius:12px;
  box-shadow:0 20px 50px rgba(124,92,255,.35);
  transition:transform .2s ease, box-shadow .2s ease;
}
.cta:hover {
  transform:translateY(-2px);
  box-shadow:0 28px 60px rgba(124,92,255,.45);
}
.section {
  padding:60px 0;
}
.section h2 {
  margin:0 0 20px;
}
.gallery .grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}
.card {
  background:var(--card);
  border-radius:16px;
  overflow:hidden;
  box-shadow:0 20px 60px var(--shadow);
}
.card img {
  display:block;
  width:100%;
  height:auto;
  opacity:0;
  transition:opacity .6s ease;
}
.card img.loaded {
  opacity:1;
}
.features-grid {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.feature {
  background:var(--card);
  padding:18px;
  border-radius:14px;
  box-shadow:0 14px 40px var(--shadow);
}
.feature .icon {
  font-size:28px;
}

.challenges ol {
  line-height:1.7;
}

.footer {
  padding:30px 0;
  border-top:1px solid rgba(255,255,255,.08);
  color:#c9d1d9;
}
.card, .feature, .cta {
  box-shadow:
    0 2px 4px rgba(0,0,0,.14),
    0 8px 24px rgba(0,0,0,.22),
    0 24px 60px rgba(0,0,0,.18);
}