* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  margin: 0;
  height: 100vh;
  background: linear-gradient(135deg, #0f172a, #1e293b);
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
}

.container {
  background: #020617;
  padding: 30px;
  border-radius: 15px;
  width: 95%;
  max-width: 420px;
  text-align: center;
  box-shadow: 0 0 25px rgba(0,0,0,0.5);
}

h1 {
  margin-bottom: 10px;
}

input {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: none;
  margin-top: 15px;
  font-size: 16px;
}

button {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: none;
  margin-top: 15px;
  background: #38bdf8;
  color: black;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background: #0ea5e9;
}

#qrBox {
  margin-top: 20px;
}

#qrImage {
  width: 200px;
  height: 200px;
  border-radius: 10px;
  background: white;
  padding: 10px;
}

/* Mobile Responsive */
@media (max-width: 480px) {
  .container {
    padding: 20px;
  }

  #qrImage {
    width: 160px;
    height: 160px;
  }
}