:root { color-scheme: light; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: flex; align-items: center; justify-content: center; background: #f6f6f4; color: #111;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; font-size: 15px; line-height: 1.5; padding: 24px; }
.karte { background: #fff; border: 1px solid #e6e6e6; border-radius: 12px; padding: 40px; width: 100%; max-width: 420px; }
h1 { font-size: 20px; margin: 0 0 4px; }
.unter { margin: 0 0 24px; color: #555; font-size: 13px; }
label { display: block; font-size: 13px; color: #555; margin-bottom: 16px; }
input { display: block; width: 100%; margin-top: 6px; padding: 12px 14px; font-size: 16px; border: 1px solid #cfcfcf; border-radius: 8px; background: #fff; color: #111; }
input:focus { outline: 2px solid #1a56c4; outline-offset: 1px; border-color: #1a56c4; }
button { width: 100%; padding: 13px; font-size: 15px; font-weight: 600; color: #fff; background: #1a56c4; border: 0; border-radius: 8px; cursor: pointer; margin-top: 8px; }
button[disabled] { opacity: .6; cursor: default; }
.fehler { color: #b3261e; background: #fbeeed; border-radius: 8px; padding: 10px 12px; margin: 0 0 12px; font-size: 14px; }
.ok { color: #1f7a4d; background: #ecf7f0; border-radius: 8px; padding: 10px 12px; margin: 0 0 12px; font-size: 14px; }
.hinweis { margin: 24px 0 0; color: #555; font-size: 13px; }
.schritt { border-top: 1px solid #e6e6e6; padding-top: 20px; margin-top: 20px; }
.schritt h2 { font-size: 15px; margin: 0 0 8px; }
.qr { display: flex; justify-content: center; margin: 12px 0; }
.qr img { width: 280px; height: 280px; max-width: 100%; display: block; image-rendering: pixelated; }
code.geheim { display: block; text-align: center; font-size: 14px; letter-spacing: .06em; color: #333; background: #f3f3f1; padding: 8px; border-radius: 6px; user-select: all; }
details { margin-top: 8px; font-size: 13px; color: #555; }