/* Grundlayout */
body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #f3f7fb;
  color: #2c3e50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  min-height: 100vh;
}

/* Container-Stil */
.container {
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  padding: 2rem;
  max-width: 400px;
  width: 100%;
  text-align: center;
}

/* Überschrift */
h2 {
  margin-bottom: 1.5rem;
  color: #0a5ea7;
}

/* Formularelemente */
form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

label {
  font-weight: 600;
  text-align: left;
}

input[type="text"],
input[type="email"] {
  padding: 0.6rem;
  font-size: 1rem;
  border: 1px solid #d0dce8;
  border-radius: 6px;
  width: 100%;
  box-sizing: border-box;
}

button {
  background-color: #0a5ea7;
  color: white;
  padding: 0.8rem;
  font-size: 1rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

button:hover {
  background-color: #084d8c;
}

/* QR-Scanner Video */
video#preview {
  width: 100%;
  margin-top: 1.5rem;
  border-radius: 8px;
  border: 1px solid #ccdcec;
  background: #eaf2f8;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* Responsive Design */
@media (max-width: 500px) {
  .container {
    padding: 1rem;
    border-radius: 8px;
  }

  h2 {
    font-size: