:root{
  --bg:#0b0f19;
  --card:rgba(255,255,255,.06);
  --card-border:rgba(255,255,255,.10);
  --text:rgba(255,255,255,.92);
  --muted:rgba(255,255,255,.65);
  --accent:#3b82f6; /* blue */
  --accent-2:#60a5fa;
  --shadow: 0 20px 60px rgba(0,0,0,.45);
  --radius:18px;
}

html, body {
  height: 100%;
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: #0b0f19;
  color: white;
}

body {
  display: flex;
  flex-direction: column;
}

/* Top Navigation */
.nav {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px 0;
}

.nav a {
  text-decoration: none;
  color: white;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.5px;
  opacity: 0.8;
  transition: opacity 0.2s ease;
}

.nav a:hover {
  opacity: 1;
}

/* Main Section */
.main {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 20px;
}

.container {
  max-width: 600px;
}

h1 {
  font-size: 42px;
  margin-bottom: 40px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.cta {
  display: inline-block;
  padding: 16px 28px;
  font-size: 16px;
  font-weight: 700;
  border-radius: 12px;
  text-decoration: none;
  color: white;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  box-shadow: 0 15px 40px rgba(37, 99, 235, 0.35);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 50px rgba(37, 99, 235, 0.45);
}

/* Footer */
.footer {
  text-align: center;
  padding: 16px;
  font-size: 12px;
  opacity: 0.6;
  color: var(--muted);
}