/* General Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Background Gradient */
body {
  background: linear-gradient(135deg, #4facfe, #00f2fe);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

/* Main Container */
.container {
  background: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 6px 15px rgba(0,0,0,0.15);
  text-align: center;
  max-width: 400px;
  width: 90%;
  animation: fadeIn 1s ease-in-out;
}

.container h1 {
  margin-bottom: 0.5rem;
  font-size: 1.8rem;
  color: #333;
}

.container p {
  margin-bottom: 1.5rem;
  color: #555;
}

/* Form */
form {
  display: flex;
  gap: 10px;
  margin-bottom: 1.5rem;
}

input[type="text"] {
  flex: 1;
  padding: 0.8rem;
  border: 2px solid #4facfe;
  border-radius: 8px;
  outline: none;
  transition: border 0.3s ease;
}

input[type="text"]:focus {
  border-color: #0078ff;
}

button {
  background: #4facfe;
  color: #fff;
  border: none;
  padding: 0.8rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background: #0078ff;
}

/* QR Code Area */
.qr-container {
  margin-top: 1rem;
}

#qr-code {
  margin: 1rem auto;
}

#download-link {
  display: inline-block;
  background: #00c851;
  color: #fff;
  text-decoration: none;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  transition: background 0.3s ease;
}

#download-link:hover {
  background: #007e33;
}

.hidden {
  display: none;
}

/* Footer */
footer {
  margin-top: 2rem;
  color: #fff;
  font-size: 0.9rem;
}

/* Animation */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}