:root { color-scheme: light dark; --text: #1b1d21; --leise: #5c6370; --grund: #f6f6f4; --flaeche: #fff; --linie: #d9dad6;
  --akzent: #1f5f8b; --akzent-text: #fff; --ok: #1d6b3a; --fehler: #a4262c; }
@media (prefers-color-scheme: dark) { :root { --text: #e8e8e6; --leise: #a3a7ae; --grund: #16181b; --flaeche: #202327;
  --linie: #34383e; --akzent: #6fb1e0; --akzent-text: #0e1114; --ok: #6cc28a; --fehler: #ff8a8f; } }
* { box-sizing: border-box; }
body { margin: 0; font: 17px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; color: var(--text); background: var(--grund); }
header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .75rem 1rem;
  border-bottom: 1px solid var(--linie); background: var(--flaeche); }
.marke { font-weight: 600; }
main { max-width: 40rem; margin: 0 auto; padding: 1rem 1rem 3rem; }
h1 { font-size: 1.4rem; margin: .5rem 0 1rem; }
h2 { font-size: 1.1rem; margin: 2rem 0 .5rem; }
form { display: grid; gap: .75rem; margin: 1rem 0; }
label { display: grid; gap: .25rem; font-weight: 500; }
input, select { font: inherit; padding: .7rem .8rem; border: 1px solid var(--linie); border-radius: .5rem; background: var(--flaeche); color: var(--text); width: 100%; }
input:focus-visible, select:focus-visible, button:focus-visible { outline: 3px solid var(--akzent); outline-offset: 2px; }
button { font: inherit; font-weight: 600; padding: .8rem 1rem; border: 0; border-radius: .5rem; background: var(--akzent); color: var(--akzent-text); cursor: pointer; min-height: 48px; }
button.leise { background: none; color: var(--akzent); padding: .4rem .6rem; min-height: 44px; }
a.knopf { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: .8rem 1rem;
  border-radius: .5rem; border: 2px solid var(--akzent); color: var(--akzent); font-weight: 600; text-decoration: none; }
.abmelden { margin: 0; }
.hinweis { padding: .75rem 1rem; border-radius: .5rem; background: var(--flaeche); border-left: 4px solid var(--ok); }
.hinweis.fehler { border-left-color: var(--fehler); }
.leise-text { color: var(--leise); font-size: .95rem; }
ul.liste { list-style: none; padding: 0; margin: 0; display: grid; gap: .5rem; }
ul.liste li { background: var(--flaeche); border: 1px solid var(--linie); border-radius: .5rem; padding: .75rem 1rem; }
ul.liste a { color: var(--akzent); }
section.kunde { background: var(--flaeche); border: 1px solid var(--linie); border-radius: .75rem; padding: 0 1rem 1rem; margin: 1rem 0; }
section.kunde h2 { margin-top: 1rem; }
details { margin: .5rem 0; }
summary { cursor: pointer; color: var(--akzent); font-weight: 500; min-height: 44px; display: flex; align-items: center; }
.qr { background: #fff; padding: 1rem; border-radius: .5rem; width: min(100%, 16rem); }
.qr svg { display: block; width: 100%; height: auto; }
code.geheimnis { font-size: 1.05rem; letter-spacing: .08em; word-break: break-all; }