:root {
  --bg: #f3f5f8;
  --card: #ffffff;
  --text: #1c2430;
  --muted: #5d6b7e;
  --line: #d9dfe8;
  --accent: #0b6e8a;
  --accent-text: #ffffff;
  --accent-soft: #e3f2f7;
  --danger: #b3261e;
  --danger-soft: #fdecea;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(20, 30, 50, 0.08), 0 4px 14px rgba(20, 30, 50, 0.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12171e;
    --card: #1b222c;
    --text: #e6ebf2;
    --muted: #9aa8bb;
    --line: #2d3746;
    --accent: #4fb3d1;
    --accent-text: #0a1218;
    --accent-soft: #1b3440;
    --danger: #ff8a80;
    --danger-soft: #3a1f1d;
    --shadow: none;
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.top { max-width: 760px; margin: 0 auto; padding: 28px 16px 8px; }
.top h1 { margin: 0; font-size: 1.7rem; letter-spacing: -0.01em; }
.subtitle { margin: 4px 0 0; color: var(--muted); }

#app { max-width: 760px; margin: 0 auto; padding: 8px 16px 48px; }

.hidden { display: none !important; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  margin-top: 14px;
}
.card h2 { margin: 0 0 6px; font-size: 1.25rem; }

.progress { margin-top: 14px; }
.bar { height: 6px; background: var(--line); border-radius: 999px; overflow: hidden; }
.bar span { display: block; height: 100%; width: 0; background: var(--accent); transition: width 0.25s ease; }
.progress-label { margin-top: 6px; font-size: 0.85rem; color: var(--muted); }

.hint { color: var(--muted); font-size: 0.9rem; margin: 6px 0 14px; }
.privacy { font-size: 0.85rem; color: var(--muted); border-left: 3px solid var(--line); padding-left: 10px; margin: 16px 0; }

label { display: block; font-weight: 600; margin-bottom: 4px; }

input[type="text"], input[type="password"], select, textarea {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
}
input[type="text"]:focus, input[type="password"]:focus, select:focus, textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}
textarea { resize: vertical; min-height: 90px; }
.invalid { border-color: var(--danger) !important; background: var(--danger-soft) !important; }

.hp { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }

.error {
  color: var(--danger);
  background: var(--danger-soft);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 12px 0 0;
}

.actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; }
.actions.wrap { flex-wrap: wrap; justify-content: flex-start; }

button {
  font: inherit;
  font-weight: 600;
  border-radius: 8px;
  padding: 11px 20px;
  cursor: pointer;
  border: 1px solid transparent;
  min-height: 44px;
}
button.primary { background: var(--accent); color: var(--accent-text); }
button.secondary { background: transparent; color: var(--text); border-color: var(--line); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* Verfahren-Auswahl */
.choices { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 8px; }
@media (max-width: 560px) { .choices { grid-template-columns: 1fr; } }
.choice {
  text-align: left;
  background: var(--bg);
  color: var(--text);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  min-height: 110px;
}
.choice:hover, .choice:focus-visible { border-color: var(--accent); background: var(--accent-soft); }
.choice .t { display: block; font-size: 1.25rem; font-weight: 700; margin-bottom: 4px; }
.choice .d { display: block; font-weight: 400; font-size: 0.9rem; color: var(--muted); }
.choice.direct { grid-column: 1 / -1; min-height: 0; border-style: dashed; }
#direct-text { margin-top: 4px; }

/* Problemliste */
.options { display: flex; flex-direction: column; gap: 8px; }
.option {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 4px 12px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 400;
  margin: 0;
}
.option:hover { border-color: var(--accent); }
.option.selected { border-color: var(--accent); background: var(--accent-soft); }
.option input { margin-top: 4px; accent-color: var(--accent); }
.option .opt-title { font-weight: 600; }
.option .opt-desc { grid-column: 2; color: var(--muted); font-size: 0.88rem; }
#custom-box { margin-top: 10px; }

/* Parameter */
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; margin: 6px 0; }
@media (max-width: 620px) { .fields { grid-template-columns: 1fr; } }
.field { margin-top: 14px; }
.fields .field { margin-top: 0; }
.field .help { font-size: 0.8rem; color: var(--muted); margin-top: 3px; }
.input-unit { display: flex; align-items: center; gap: 8px; }
.input-unit .unit { color: var(--muted); white-space: nowrap; font-size: 0.9rem; }

details.more { margin-top: 16px; border: 1px dashed var(--line); border-radius: 10px; padding: 10px 14px; }
details.more summary { cursor: pointer; font-weight: 600; }
details.more[open] summary { margin-bottom: 12px; }

/* Antwort */
.waiting { text-align: center; padding: 18px 8px; color: var(--muted); }
.spinner {
  width: 38px; height: 38px; margin: 0 auto 12px;
  border: 4px solid var(--line); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.question-box { margin: 10px 0 16px; border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; }
.question-box summary { cursor: pointer; font-weight: 600; }
.question-box pre { white-space: pre-wrap; word-wrap: break-word; font: inherit; font-size: 0.9rem; color: var(--muted); margin: 10px 0 0; }

.answer h4 { margin: 18px 0 6px; font-size: 1.05rem; }
.answer p { margin: 8px 0; }
.answer ul, .answer ol { margin: 6px 0 10px; padding-left: 24px; }
.answer li { margin: 4px 0; }
.answer code { background: var(--bg); padding: 1px 5px; border-radius: 4px; font-size: 0.9em; }
.model { font-size: 0.8rem; color: var(--muted); margin: 12px 0 0; }
.disclaimer { font-size: 0.82rem; color: var(--muted); border-left: 3px solid var(--line); padding-left: 10px; margin: 12px 0; }

/* Streaming */
button.small { padding: 4px 12px; min-height: 32px; font-size: 0.85rem; }
.waiting button { margin-top: 8px; }
.streaming { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 0.9rem; margin: 12px 0 0; }
.streaming .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); animation: pulse 1s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 0.25; transform: scale(0.8); } 50% { opacity: 1; transform: scale(1.15); } }

/* Konto */
.userbar { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 14px; margin-top: 10px; font-size: 0.9rem; color: var(--muted); }
button.link { background: none; border: none; padding: 2px 0; min-height: 0; color: var(--accent); font-weight: 600; text-decoration: underline; }
.success { color: #1b6e3a; background: #e6f4ea; border-radius: 8px; padding: 10px 12px; margin: 14px 0 0; }
@media (prefers-color-scheme: dark) { .success { color: #8be0a4; background: #1b3326; } }
#form0 .field, #formPw .field { margin-top: 12px; }

/* Benutzerverwaltung */
label.check { display: flex; align-items: center; gap: 8px; font-weight: 400; margin-top: 12px; }
label.check input { accent-color: var(--accent); width: 18px; height: 18px; }
.secret { margin-top: 16px; padding: 14px; border: 2px solid var(--accent); border-radius: 10px; background: var(--accent-soft); }
.secret p { margin: 0 0 6px; }
.secret code { display: inline-block; font-size: 1.2rem; font-weight: 700; letter-spacing: 0.05em; padding: 4px 10px;
  background: var(--card); border-radius: 6px; user-select: all; word-break: break-all; }
.secret .hint { margin: 8px 0; }
.table-wrap { overflow-x: auto; margin-top: 20px; }
table.users { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
table.users th { text-align: left; color: var(--muted); font-weight: 600; padding: 6px 8px; border-bottom: 1px solid var(--line); }
table.users td { padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.users .row-actions { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; }
.badge { display: inline-block; font-size: 0.75rem; font-weight: 700; padding: 0 7px; border-radius: 999px;
  border: 1px solid var(--accent); color: var(--accent); margin-left: 6px; }
.muted { color: var(--muted); }
.status-locked { color: var(--danger); font-weight: 600; }
button.danger { color: var(--danger); border-color: var(--danger); background: transparent; }
@media (max-width: 620px) {
  table.users thead { display: none; }
  table.users tr { display: block; border-bottom: 1px solid var(--line); padding: 8px 0; }
  table.users td { display: block; border: none; padding: 2px 0; }
  table.users .row-actions { justify-content: flex-start; margin-top: 6px; }
}