:root {
  --blau: #1f3a5f;
  --blau-hell: #2d5a8f;
  --grund: #f4f6f9;
  --flaeche: #ffffff;
  --text: #1b2430;
  --text-leise: #5b6676;
  --rand: #d8dee7;
  --rot: #b42318;
  --radius: 12px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --grund: #10151c;
    --flaeche: #1a222d;
    --text: #e6ebf2;
    --text-leise: #9aa6b6;
    --rand: #2c3746;
    --rot: #f97066;
    --blau-hell: #6f9fd8;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 17px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--grund);
  color: var(--text);
  padding-bottom: env(safe-area-inset-bottom);
}

.kopf {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: calc(12px + env(safe-area-inset-top)) 16px 12px;
  background: var(--blau);
  color: #fff;
}
.marke { font-weight: 700; letter-spacing: .02em; }
.marke span { font-weight: 400; opacity: .8; }
#benutzer-info { display: flex; align-items: center; gap: 12px; }
#benutzer-info[hidden] { display: none; }

main { max-width: 900px; margin: 0 auto; padding: 24px 16px; }

.karte {
  background: var(--flaeche);
  border: 1px solid var(--rand);
  border-radius: var(--radius);
  padding: 24px;
}
.login { max-width: 420px; margin: 8vh auto 0; }

h1 { font-size: 1.5rem; margin: 0 0 16px; }
.hinweis { color: var(--text-leise); }

label { display: block; margin-bottom: 16px; font-weight: 600; font-size: .95rem; }
input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 12px 14px;
  font: inherit;
  color: var(--text);
  background: var(--grund);
  border: 1px solid var(--rand);
  border-radius: 8px;
}
input:focus { outline: 2px solid var(--blau-hell); outline-offset: 1px; }

.knopf {
  min-height: 48px;
  padding: 0 20px;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--blau-hell);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}
form .knopf { width: 100%; }
.knopf:disabled { opacity: .6; }
.knopf-leise {
  min-height: 36px;
  padding: 0 12px;
  background: transparent;
  border: 1px solid rgba(255,255,255,.5);
}

.fehler { color: var(--rot); margin: 0 0 16px; }