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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: #0a0a0f;
  color: #f0f0f0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.bg-glow {
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.18) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.card {
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 3rem 3rem 3rem;
  max-width: 480px;
  width: calc(100% - 2rem);
  text-align: center;
  backdrop-filter: blur(12px);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.03),
    0 24px 64px rgba(0,0,0,0.4),
    inset 0 1px 0 rgba(255,255,255,0.07);
}

.icon {
  font-size: 2.25rem;
  margin-bottom: 1.25rem;
  line-height: 1;
  filter: grayscale(0.2);
}

.label {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #6366f1;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

h1 {
  font-size: clamp(1.6rem, 5vw, 2.25rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1rem;
  color: #fff;
  letter-spacing: -0.02em;
}

.sub {
  font-size: 0.95rem;
  color: #888;
  line-height: 1.65;
  margin-bottom: 2rem;
}

.whatsapp-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1.6rem;
  background: #25D366;
  color: #fff;
  text-decoration: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.3);
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

.whatsapp-btn:hover {
  background: #1ebe5d;
  box-shadow: 0 6px 28px rgba(37, 211, 102, 0.45);
  transform: translateY(-1px);
}

.whatsapp-btn:active {
  transform: translateY(0);
}