:root {
  --bg-primary: #030712;
  --bg-surface: #0b0f19;
  --card-bg: rgba(13, 19, 32, 0.85);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --accent: #06b6d4;
  --accent-rgb: 6, 182, 212;
  --border-glow: rgba(6, 182, 212, 0.3);
}

* { box-sizing: border-box; scroll-behavior: smooth; }

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  overflow-x: hidden;
}

#bg-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: 0; pointer-events: none;
  opacity: 0.45;
}

.cyan-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glow);
  box-shadow: 0 0 30px rgba(6, 182, 212, 0.12);
  transition: all 0.3s ease;
}

.cyan-card:hover {
  border-color: rgba(var(--accent-rgb), 0.8);
  box-shadow: 0 0 35px rgba(6, 182, 212, 0.35);
  transform: translateY(-2px);
}

.btn-cyan {
  background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
  color: #030712;
  font-weight: 800;
  box-shadow: 0 0 25px rgba(6, 182, 212, 0.4);
  transition: all 0.3s ease;
}

.btn-cyan:hover {
  box-shadow: 0 0 40px rgba(6, 182, 212, 0.8);
  transform: scale(1.02);
}

.glow-cyan {
  text-shadow: 0 0 20px rgba(6, 182, 212, 0.6);
}