body {
  margin: 0;
  padding-bottom: 80px;
  min-height: 100vh;
  background: linear-gradient(to bottom right, #1f2937, #374151);
  font-family: Arial, sans-serif;
  color: white;
  display: block;
  overflow: hidden;
}

.container {
  background: radial-gradient(ellipse at center, #1f2937, #4b5563);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  max-width: 400px;
  width: 90%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 100px auto 0 auto;
}

h1 {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 16px;
}

input[type="text"] {
  width: 100%;
  padding: 12px;
  border-radius: 12px;
  border: none;
  margin-bottom: 16px;
  font-size: 16px;
  color: black;
  text-align: center;
  box-sizing: border-box;
}


button {
  background-color: #6366f1;
  color: white;
  padding: 10px 24px;
  font-size: 16px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #4f46e5;
}

.back-button {
  position: fixed;
  top: 10px;
  left: 10px;
  background-color: #6366f1;
  color: white;
  padding: 10px 24px;
  font-size: 16px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.back-button:hover {
  background-color: #4f46e5;
}

#qrcode {
  margin-top: 24px;
}

.footer {
  background-color: #1f293799;
  color: #ffffffcc;
  padding: 12px;
  font-size: 14px;
  text-align: center;
  position: fixed;
  bottom: 0;
  width: 100%;
  backdrop-filter: blur(5px);
}

@media (max-width: 500px) {
  .container {
    padding: 1rem;
    margin-top: 60px;
  }

  input[type="text"] {
    font-size: 14px;
  }

  button {
    font-size: 14px;
    padding: 8px 16px;
  }

  #qrcode {
    margin-top: 16px;
  }
}