body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #121212;
  color: #eee;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}
.wrapper {
  max-width: 480px;
  padding: 2rem;
  text-align: center;
}
.header img.logo {
  width: 64px;
  margin-bottom: 1rem;
}
.header h1 {
  color: #29abe2;
  margin: 0.5rem 0;
}
.scan-form input {
  width: 100%;
  padding: 1rem;
  margin-bottom: 1rem;
  background: #1f1f1f;
  border: none;
  border-radius: 8px;
  color: #fff;
}
.scan-form button {
  width: 100%;
  padding: 1rem;
  background: #29abe2;
  border: none;
  border-radius: 8px;
  font-weight: bold;
  color: #000;
  cursor: pointer;
}
.nav-links a {
  display: inline-block;
  margin: 1rem 0.5rem 0;
  color: #29abe2;
  text-decoration: none;
}