/* Praxis-Look: grün-weiß, runde Ecken, große Buttons */
* { box-sizing: border-box; }
:root {
  --green: #43a047;
  --green-2: #66bb6a;
  --bg: #f6fbf6;
  --ink: #1b1b1b;
  --muted: #667085;
  --card: #ffffff;
  --warn: #e53935;
}
html, body {
  margin: 0; padding: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--ink); background: var(--bg);
}
.app-header {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; background: var(--card); border-bottom: 1px solid #e6e6e6;
}
.logo { width: 56px; height: 56px; object-fit: contain; }
.title-wrap h1 { margin: 0; font-size: 1.35rem; }
.subtitle { margin: 2px 0 0; color: var(--muted); font-size: .95rem; }
.header-actions { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }

.container {
  max-width: 980px; margin: 18px auto; padding: 0 16px;
}
.card {
  background: var(--card); border: 1px solid #e9ecef;
  padding: 16px; border-radius: 16px; box-shadow: 0 3px 10px rgba(0,0,0,.04);
  margin-bottom: 16px;
}
.card h2 { margin-top: 0; }
.text-box {
  max-height: 300px; overflow: auto; padding: 12px 14px; line-height: 1.6;
  background: #f9fff9; border: 1px solid #e0f2e9; border-radius: 12px;
}
.hint { margin-top: 10px; }
.qa-form label { display: block; margin: 10px 0; font-weight: 600; }
.qa-form textarea {
  width: 100%; margin-top: 6px; padding: 10px; border-radius: 12px; border: 1px solid #dfe3e6;
  min-height: 2.6em; resize: vertical; font-size: 1rem; background: #fff;
}
.qa-form .actions { display:flex; align-items:center; gap:12px; margin-top: 8px; }

.btn {
  border: 1px solid #cfe8d2; background: var(--card); color: var(--ink);
  padding: 9px 14px; border-radius: 12px; cursor: pointer; font-weight: 600;
}
.btn.primary { background: var(--green); color: #fff; border-color: var(--green); }
.btn.ghost { background: #fff; }
.btn.danger { background: var(--warn); color: #fff; border-color: var(--warn); }
.btn:active { transform: translateY(1px); }
.autosave { color: var(--muted); font-size: .9rem; }

.choices { margin-top: 0; }
.teacher details summary { cursor: pointer; font-weight: 700; }
.pw-box { display:flex; gap:10px; align-items:center; margin: 8px 0 12px; flex-wrap: wrap; }
.pw-hint { color: var(--muted); margin: 0; }
.solutions.hidden { display: none; }
.solutions ul { margin-top: 0; }
.note { color: var(--muted); }

.footer {
  text-align: center; color: var(--muted); padding: 24px 8px; font-size: .95rem;
}

@media print {
  header, .header-actions, #installBtn, #ttsBtn, #resetBtn, #exportTxt { display: none !important; }
  .text-box { max-height: none; border-color: #ddd; background: #fff; }
  body { background: #fff; }
}