:root {
  --bg: #e8eef1;
  --surface: #ffffff;
  --ink: #15283b;
  --muted: #5a6b7b;
  --line: #cfd9df;
  --accent: #0d7a85;
  --accent-ink: #ffffff;
  --ok: #2b7a4b;
  --ok-bg: #e2f3e8;
  --bad: #b83a2b;
  --bad-bg: #fbe6e2;
  --mid: #e9c46a;
  --serif: Charter, "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1923; --surface: #172633; --ink: #e5edf2; --muted: #93a5b4;
    --line: #2a3d4c; --accent: #4fc0ca; --accent-ink: #082126;
    --ok: #6fd095; --ok-bg: #163427; --bad: #ff8d7c; --bad-bg: #3b1d1a; --mid: #c9a13d;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.5 var(--sans);
}
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 64px; }
h1, h2 { font-family: var(--serif); line-height: 1.2; margin: 0 0 12px; }
h1 { font-size: 1.9rem; } h2 { font-size: 1.25rem; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
a { color: var(--accent); }

.top {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 8px 24px; max-width: 760px; margin: 0 auto; padding: 16px 16px 0;
}
.brand { font: 700 1.2rem var(--serif); color: var(--ink); text-decoration: none; }
nav { display: flex; gap: 4px; }
nav a {
  padding: 8px 14px; border-radius: 999px; color: var(--muted);
  text-decoration: none; font-weight: 600;
}
nav a:hover { color: var(--ink); }
nav a.on { background: var(--ink); color: var(--bg); }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.panel, .card, .ds {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 14px; padding: 20px; margin-bottom: 16px;
}

/* Buttons & Eingaben */
.btn {
  display: inline-block; font: 600 1rem var(--sans); cursor: pointer;
  padding: 10px 18px; border-radius: 10px; text-decoration: none;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
}
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.danger { color: var(--bad); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.small { padding: 6px 12px; font-size: .9rem; }
input[type=text], select {
  font: 1rem var(--sans); color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px; padding: 11px 14px; width: 100%;
}
select { width: auto; padding: 6px 10px; }
input[type=file] { position: absolute; width: 1px; height: 1px; opacity: 0; }
input[type=file]:focus-visible + label { outline: 3px solid var(--accent); outline-offset: 2px; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 12px; }
.row input[type=text] { flex: 1 1 260px; width: auto; }
.upload { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin: 12px 0; }

/* Abfrage */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.chip {
  display: inline-flex; gap: 6px; align-items: center; cursor: pointer;
  padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--surface); font-size: .92rem; user-select: none;
}
.chip input { accent-color: var(--accent); margin: 0; }
.chip.on { border-color: var(--accent); }

.card { padding: 28px 24px; }
.meta { display: flex; gap: 10px; align-items: center; color: var(--muted); font-size: .9rem; min-height: 24px; }
.meta .dots { margin-left: auto; }
.badge {
  background: var(--accent); color: var(--accent-ink); font-weight: 700;
  font-size: .78rem; padding: 2px 9px; border-radius: 999px;
}
.dots { display: inline-flex; gap: 4px; }
.dots i { width: 10px; height: 10px; border-radius: 50%; border: 2px solid var(--line); }
.dots i.f { background: var(--accent); border-color: var(--accent); }
.key-label { margin: 22px 0 2px; color: var(--muted); }
.key { font-size: clamp(2rem, 7vw, 3rem); margin: 0 0 8px; overflow-wrap: anywhere; }
.ask { font-size: 1.15rem; margin-bottom: 20px; }
.hint { color: var(--muted); font-size: .9rem; margin: 8px 0 0; }
#answer { font-size: 1.15rem; padding: 14px 16px; }

.verdict {
  font: 700 1.3rem var(--serif); padding: 12px 16px; border-radius: 10px; margin-bottom: 16px;
}
.verdict.ok { background: var(--ok-bg); color: var(--ok); }
.verdict.bad { background: var(--bad-bg); color: var(--bad); }
.solution { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0 0 12px; }
.solution dt { color: var(--muted); }
.solution dd { margin: 0; font-weight: 600; overflow-wrap: anywhere; }
.detail { color: var(--muted); }
.extras { border-top: 1px solid var(--line); margin-top: 8px; padding-top: 12px; }
.extras h3 { font-size: .95rem; margin: 0 0 2px; color: var(--muted); font-weight: 600; }
.extras p { margin-bottom: 10px; }
.session { text-align: center; color: var(--muted); }

/* Datensätze */
.ds header { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: baseline; justify-content: space-between; }
.ds h2 { margin: 0; }
.ds .actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
table { border-collapse: collapse; width: 100%; }
.cols th, .cols td { text-align: left; padding: 8px 6px; border-top: 1px solid var(--line); font-weight: 400; }
.cols th { font-weight: 600; }
.cols { margin-top: 12px; }
.msg { margin-top: 12px; padding: 10px 14px; border-radius: 10px; }
.msg.ok { background: var(--ok-bg); color: var(--ok); }
.msg.err { background: var(--bad-bg); color: var(--bad); }

/* Statistik */
.legend { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 16px; font-size: .9rem; }
.sw { display: inline-block; width: 14px; height: 14px; border-radius: 4px; margin-right: 6px; vertical-align: -2px; }
.s-none { background: var(--line); }
.s-bad  { background: #e26d5c; }
.s-mid  { background: var(--mid); }
.s-good { background: #4caf7a; }
.bar { height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; margin: 8px 0 4px; }
.bar > span { display: block; height: 100%; background: #4caf7a; }
.scroll { overflow-x: auto; margin-top: 12px; }
.grid th, .grid td { padding: 6px 8px; font-size: .88rem; text-align: center; white-space: nowrap; }
.grid th { font-weight: 600; color: var(--muted); }
.grid td:first-child, .grid th:first-child { text-align: left; position: sticky; left: 0; background: var(--surface); font-weight: 600; color: var(--ink); }
.grid td.c { border: 2px solid var(--surface); border-radius: 6px; color: #10202e; min-width: 56px; }
.grid td.s-none { background: var(--line); color: var(--muted); }
.grid td.na { color: var(--muted); }

@media (max-width: 520px) {
  .card { padding: 22px 16px; }
  .solution { grid-template-columns: 1fr; gap: 0; }
  .solution dd { margin-bottom: 8px; }
}
@media (prefers-reduced-motion: no-preference) {
  .verdict { animation: pop .18s ease-out; }
  @keyframes pop { from { transform: scale(.97); opacity: .4; } to { transform: none; opacity: 1; } }
}