:root {
  --primary: #7CC7A4;
  --secondary: #6FB7D6;
  --accent: #F6A64D;
  --dark: #1F2937;
  --light: #F8FAFC;
}

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

body {
  min-height: 100vh;
  background: radial-gradient(
    circle at top,
    var(--secondary),
    var(--dark)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--light);
}

.container {
  padding: 20px;
}

.card {
  background: rgba(31, 41, 55, 0.85);
  backdrop-filter: blur(12px);
  border-radius: 24px;
  padding: 40px 30px;
  max-width: 420px;
  text-align: center;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
  100% { transform: translateY(0); }
}

.app-icon {
  width: 110px;
  height: 110px;
  border-radius: 24px;
  margin-bottom: 20px;
  box-shadow: 0 15px 40px rgba(124, 199, 164, 0.5);
}

h1 {
  font-size: 2rem;
  margin-bottom: 10px;
}

p {
  font-size: 1rem;
  opacity: 0.9;
  margin-bottom: 30px;
  line-height: 1.8;
}

button {
  background: linear-gradient(
    135deg,
    var(--primary),
    var(--accent)
  );
  border: none;
  color: var(--dark);
  padding: 16px 30px;
  font-size: 1.1rem;
  font-weight: bold;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 12px 35px rgba(246, 166, 77, 0.4);
}

button:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 18px 50px rgba(246, 166, 77, 0.6);
}

.qr-section {
  margin-top: 35px;
}

.qr-section h3 {
  margin-bottom: 15px;
  color: var(--secondary);
}

#qrcode {
  display: flex;
  justify-content: center;
}

.download-btn {
  display: inline-block;
  text-decoration: none;
  background: linear-gradient(
    135deg,
    var(--primary),
    var(--accent)
  );
  color: var(--dark);
  padding: 16px 30px;
  font-size: 1.1rem;
  font-weight: bold;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 12px 35px rgba(246, 166, 77, 0.4);
}

.download-btn:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 18px 50px rgba(246, 166, 77, 0.6);
}