::-webkit-scrollbar {
width: 5px;
height: 9px;
}
::-webkit-scrollbar-thumb {
background: #444;
border-radius: 5px;
}
body {
  font-family: Arial, sans-serif;
  padding: 1em;
  margin: 0;
  background: #000;
  color: #ccc;
}
.container {
  max-width: 800px;
  margin: auto;
  background: #1a1919;
  padding: 2em;
  border-radius: 5px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}
h1 {
  text-align: center;
  margin-bottom: 1em;
}
label {
  display: block;
  margin-top: 1em;
}
input, select, textarea {
  width: 100%;
  padding: 0.5em;
  color: #fff;
  margin-top: 0.5em;
  background: #000;
  border: 1px solid #ccc;
  border-radius: 5px;
}
button {
  display: block;
  margin-left: auto;
  margin-right: auto;
  margin-top: 1.5em;
  padding: 0.75em;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  width: 30%;
}
canvas {
  display: block;
  margin: 2em auto;
  border: 1px solid #101010;
}
.qr-options {
  display: flex;
  flex-wrap: wrap;
  gap: 1em;
}
.qr-options > div {
  flex: 1 1 45%;
}
@media (max-width: 600px) {
  .qr-options > div {
    flex: 1 1 100%;
  }
}