* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Poppins", sans-serif;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0a2540, #081c33);
  padding: 20px;
}

.container {
  background: #0f2a44;
  color: #ffffff;
  padding: 40px 30px;
  border-radius: 14px;
  text-align: center;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

.success-icon {
  font-size: 90px;
  color: #22c55e;
  margin-bottom: 20px;
}

h1 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 10px;
}

.success-text {
  font-size: 18px;
  opacity: 0.9;
  margin-bottom: 12px;
}

.redirect-text {
  font-size: 15px;
  opacity: 0.85;
  color: #cfc6c6;
}

#countdown {
  font-weight: 600;
  color: #38bdf8;
}

.whatsapp-btn {
  display: none;
  margin-top: 25px;
  background: #25d366;
  color: #ffffff;
  padding: 12px 20px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 500;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.whatsapp-btn i {
  font-size: 20px;
}

/* Responsive */
@media (max-width: 480px) {
  .success-icon {
    font-size: 70px;
  }

  h1 {
    font-size: 24px;
  }

  .success-text {
    font-size: 16px;
  }
}