*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #060b18;
  --text: #f4f7ff;
  --muted: #8fa3cc;
  --accent: #3b7dff;
  --accent-light: #6ea0ff;
  --card: rgba(14, 22, 48, 0.75);
  --border: rgba(100, 140, 220, 0.12);
}

html, body {
  min-height: 100vh;
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

.noise {
  position: fixed;
  inset: 0;
  opacity: 0.04;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}
.glow-1 { width: 500px; height: 500px; background: rgba(59,125,255,0.15); top: -100px; left: 20%; }
.glow-2 { width: 400px; height: 400px; background: rgba(80,60,200,0.1); bottom: 0; right: 10%; }

.header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent), #5b4fff);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.logo-text { font-size: 22px; font-weight: 800; letter-spacing: -0.5px; }

.header-link {
  display: flex; align-items: center; gap: 8px;
  color: var(--muted); text-decoration: none; font-size: 14px;
  transition: color 0.2s;
}
.header-link:hover { color: var(--text); }

.hero {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  align-items: center;
  gap: 24px;
  max-width: 1200px;
  margin: 40px auto 60px;
  padding: 0 32px;
  min-height: 55vh;
}

.hero-center { text-align: center; }

.hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.highlight { color: var(--accent-light); }

.hero-sub {
  font-size: 15px;
  line-height: 1.65;
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto 32px;
}

.cta-btn {
  display: inline-flex;
  align-items: stretch;
  background: var(--accent);
  border-radius: 50px;
  text-decoration: none;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(59,125,255,0.35);
  transition: transform 0.2s, box-shadow 0.2s;
}
.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(59,125,255,0.45);
}
.cta-main {
  padding: 16px 28px;
  font-weight: 600;
  font-size: 16px;
  color: white;
}
.cta-badge {
  background: white;
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
  padding: 16px 22px;
  border-radius: 50px;
  margin: 4px;
  display: flex; align-items: center;
}

.preview-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px 24px;
  backdrop-filter: blur(12px);
  width: 240px;
}
.preview-icon { font-size: 28px; margin-bottom: 12px; }
.preview-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; }
.preview-card p { font-size: 12px; color: var(--muted); line-height: 1.5; margin-bottom: 16px; }
.preview-input {
  height: 36px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
}

.preview-left { justify-self: end; }
.preview-right { justify-self: start; }

.float { animation: float 6s ease-in-out infinite; }
.float-delay { animation: float 6s ease-in-out 1.5s infinite; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.radar {
  width: 200px; height: 200px;
  position: relative;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.radar-ring {
  position: absolute;
  border: 1px solid rgba(59,125,255,0.2);
  border-radius: 50%;
}
.r1 { width: 60px; height: 60px; }
.r2 { width: 110px; height: 110px; }
.r3 { width: 160px; height: 160px; }
.radar-dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent);
}
.radar-sweep {
  position: absolute;
  width: 80px; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent));
  transform-origin: left center;
  animation: sweep 3s linear infinite;
}
@keyframes sweep {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.download-section {
  text-align: center;
  padding: 40px 20px 80px;
  position: relative; z-index: 5;
}
.download-link {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 4px;
  transition: color 0.2s;
}
.download-link:hover { color: var(--accent-light); }
.download-hint { margin-top: 10px; font-size: 13px; color: var(--muted); }

.chat-fab {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 56px; height: 56px;
  background: var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 24px rgba(59,125,255,0.4);
  z-index: 20;
  transition: transform 0.2s;
}
.chat-fab:hover { transform: scale(1.08); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .preview { display: none; }
  .header { padding: 20px 24px; }
}