* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #667eea, #764ba2);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.wrapper {
  width: 100%;
  padding: 20px;
}

.card {
  background: #ffffff;
  max-width: 480px;
  margin: auto;
  padding: 40px 30px;
  border-radius: 16px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  text-align: center;
}

.card h1 {
  font-size: 24px;
  margin-bottom: 10px;
  color: #333;
}

.sub {
  font-size: 14px;
  color: #666;
  margin-bottom: 20px;
}

input[type="text"] {
  width: 100%;
  padding: 14px;
  margin: 10px 0;
  border: 2px solid #ddd;
  border-radius: 8px;
  font-size: 16px;
  outline: none;
  transition: 0.2s ease;
}

input[type="text"]:focus {
  border-color: #764ba2;
}

button {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  border: none;
  background: #764ba2;
  color: #fff;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s ease;
}

button:hover {
  background: #5e3d96;
}

#result {
  margin-top: 20px;
  font-size: 16px;
  word-break: break-all;
}

#result a {
  color: #667eea;
  text-decoration: none;
  font-weight: 600;
}

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