/* ============================================================
   Lern-App - Schueler-Oberflaeche
   Grosse Flaechen, klare Farben, gut mit dem Finger bedienbar.
   ============================================================ */

:root {
  --bg:        #f4f2fb;
  --bg-2:      #e9f0ff;
  --card:      #ffffff;
  --card-2:    #f8f9ff;
  --ink:       #1b1d2b;
  --ink-soft:  #5c6178;
  --line:      #e4e5f0;
  --accent:    #6b4dff;
  --accent-2:  #8f7bff;
  --accent-ink:#ffffff;
  --ok:        #16a34a;
  --ok-bg:     #dcfce7;
  --bad:       #e11d48;
  --bad-bg:    #ffe4e9;
  --warm:      #f59e0b;
  --radius:    20px;
  --radius-sm: 12px;
  --shadow:    0 10px 30px rgba(43, 33, 92, .10);
  --shadow-sm: 0 3px 10px rgba(43, 33, 92, .08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:       #0f1220;
    --bg-2:     #131a2e;
    --card:     #1a1f33;
    --card-2:   #222842;
    --ink:      #eceefb;
    --ink-soft: #9aa2c4;
    --line:     #2c3352;
    --accent:   #7c68ff;
    --accent-2: #9b8bff;
    --ok:       #22c55e;
    --ok-bg:    #14351f;
    --bad:      #fb7185;
    --bad-bg:   #3d1520;
    --shadow:   0 10px 30px rgba(0, 0, 0, .40);
    --shadow-sm:0 3px 10px rgba(0, 0, 0, .30);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(165deg, var(--bg) 0%, var(--bg-2) 100%);
  background-attachment: fixed;
  color: var(--ink);
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: none;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1rem 3rem;
}

/* ---------------------------------------------------- Kopfzeile */
.topbar {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1rem 0 1.25rem;
}
.topbar h1 {
  font-size: 1.25rem;
  margin: 0;
  letter-spacing: -.01em;
  flex: 1;
}
.topbar .logo {
  width: 38px; height: 38px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 800; font-size: 1.05rem;
  box-shadow: var(--shadow-sm);
}
.icon-btn {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  border-radius: 12px;
  padding: .5rem .75rem;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.icon-btn:active { transform: translateY(1px); }

/* ------------------------------------------------------- Karten */
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.card > h2 {
  margin: 0 0 .2rem;
  font-size: 1rem;
  letter-spacing: .01em;
}
.card > p.hint {
  margin: 0 0 .9rem;
  font-size: .82rem;
  color: var(--ink-soft);
}

/* ------------------------------------------------------- Chips */
.chips { display: flex; flex-wrap: wrap; gap: .5rem; }

.chip {
  border: 2px solid var(--line);
  background: var(--card-2);
  color: var(--ink);
  border-radius: 999px;
  padding: .55rem 1rem;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform .08s, border-color .12s, background .12s;
}
.chip:active { transform: scale(.96); }
.chip[aria-pressed="true"],
.chip.on {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, var(--card));
  color: var(--accent);
}
.chip .dot {
  display: inline-block;
  width: .6rem; height: .6rem;
  border-radius: 50%;
  margin-right: .45rem;
  vertical-align: baseline;
}

/* --------------------------------------------------- Stufenliste */
.level {
  border: 2px solid var(--line);
  border-radius: var(--radius-sm);
  margin-bottom: .6rem;
  overflow: hidden;
  background: var(--card-2);
  transition: border-color .12s;
}
.level.on { border-color: var(--accent); }

.level-head {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem .85rem;
  cursor: pointer;
  user-select: none;
}
.level-no {
  width: 34px; height: 34px;
  flex: 0 0 34px;
  border-radius: 10px;
  display: grid; place-items: center;
  font-weight: 800;
  background: var(--line);
  color: var(--ink-soft);
}
.level.on .level-no {
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  color: #fff;
}
.level-title { flex: 1 1 auto; min-width: 0; }
.level-title strong {
  display: block;
  font-size: .95rem;
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.level-title span {
  display: block;
  font-size: .75rem;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.level-count {
  font-size: .75rem;
  color: var(--ink-soft);
  background: var(--card);
  border-radius: 999px;
  padding: .2rem .55rem;
  white-space: nowrap;
}
.level-toggle {
  border: 0; background: none; cursor: pointer;
  font-size: 1rem; color: var(--ink-soft); padding: .3rem;
}

.level-body {
  display: none;
  padding: .2rem .85rem .85rem;
  border-top: 1px solid var(--line);
}
.level.open .level-body { display: block; }

.cat {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .5rem .1rem;
  cursor: pointer;
  border-bottom: 1px solid var(--line);
}
.cat:last-child { border-bottom: 0; }
.cat input { width: 20px; height: 20px; accent-color: var(--accent); flex: 0 0 auto; }
.cat-txt { flex: 1; min-width: 0; }
.cat-txt strong { display: block; font-size: .88rem; font-weight: 600; }
.cat-txt span { font-size: .75rem; color: var(--ink-soft); }
.cat-ex {
  font-size: .78rem;
  color: var(--ink-soft);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .15rem .45rem;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.mini-actions { display: flex; gap: .5rem; margin: .5rem 0 .2rem; }
.mini {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-soft);
  border-radius: 8px;
  padding: .3rem .6rem;
  font-size: .75rem;
  cursor: pointer;
}

/* ------------------------------------------------- Grosse Buttons */
.btn-primary {
  display: block;
  width: 100%;
  border: 0;
  border-radius: 16px;
  padding: 1.05rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-ink);
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 35%, transparent);
  cursor: pointer;
  transition: transform .08s;
}
.btn-primary:active { transform: translateY(2px); }
.btn-primary:disabled { opacity: .45; box-shadow: none; cursor: not-allowed; }

.btn-ghost {
  display: block;
  width: 100%;
  border: 2px solid var(--line);
  background: var(--card);
  color: var(--ink);
  border-radius: 14px;
  padding: .85rem;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: .6rem;
}

/* ---------------------------------------------------- Quiz-Ansicht */
.quiz-top {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: .8rem;
}
.score-pill {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-weight: 700;
  font-size: .95rem;
  background: var(--card);
  border-radius: 999px;
  padding: .4rem .8rem;
  box-shadow: var(--shadow-sm);
  font-variant-numeric: tabular-nums;
}
.score-pill.ok  { color: var(--ok); }
.score-pill.bad { color: var(--bad); }
.score-pill.time { margin-left: auto; color: var(--ink); }

.timer-track {
  height: 8px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
  margin-bottom: 1rem;
}
.timer-fill {
  height: 100%;
  width: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .3s linear, background .3s;
}
.timer-fill.low { background: linear-gradient(90deg, var(--warm), var(--bad)); }

.question-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 1.25rem;
  text-align: center;
  margin-bottom: 1rem;
  min-height: 150px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: .5rem;
}
.question-cat {
  font-size: .75rem;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.question {
  font-size: clamp(2rem, 11vw, 3.4rem);
  font-weight: 800;
  letter-spacing: .01em;
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
  word-break: break-word;
}
.question.is-text {
  font-size: clamp(1.1rem, 4.6vw, 1.5rem);
  font-weight: 700;
  line-height: 1.4;
}

.answers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
}
.answers.three { grid-template-columns: 1fr 1fr 1fr; }

.answer {
  border: 2px solid var(--line);
  background: var(--card);
  color: var(--ink);
  border-radius: 18px;
  padding: 1.2rem .5rem;
  font-size: clamp(1.4rem, 6vw, 2rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform .08s, background .15s, border-color .15s, color .15s;
  min-height: 84px;
  word-break: break-word;
}
.answer.small { font-size: clamp(1rem, 4vw, 1.35rem); }
.answer:active { transform: scale(.97); }
.answer.correct {
  background: var(--ok-bg);
  border-color: var(--ok);
  color: var(--ok);
}
.answer.wrong {
  background: var(--bad-bg);
  border-color: var(--bad);
  color: var(--bad);
}
.answer.dim { opacity: .45; }
.answers.locked .answer { cursor: default; }

.feedback {
  text-align: center;
  font-weight: 700;
  font-size: 1rem;
  min-height: 1.6rem;
  margin-top: .9rem;
  font-variant-numeric: tabular-nums;
}
.feedback.ok  { color: var(--ok); }
.feedback.bad { color: var(--bad); }

.streak-badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  background: color-mix(in srgb, var(--warm) 18%, var(--card));
  color: var(--warm);
  border-radius: 999px;
  padding: .2rem .6rem;
  font-size: .8rem;
  font-weight: 700;
}

/* ------------------------------------------------------ Ergebnis */
.result-hero {
  text-align: center;
  padding: 1.5rem 1rem;
}
.result-emoji { font-size: 3rem; line-height: 1; }
.result-score {
  font-size: 3rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  margin: .3rem 0 0;
}
.result-sub { color: var(--ink-soft); font-size: .9rem; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .6rem;
  margin: 1rem 0;
}
.stat {
  background: var(--card-2);
  border-radius: var(--radius-sm);
  padding: .8rem .5rem;
  text-align: center;
}
.stat b {
  display: block;
  font-size: 1.4rem;
  font-variant-numeric: tabular-nums;
}
.stat span { font-size: .72rem; color: var(--ink-soft); }
.stat.ok b  { color: var(--ok); }
.stat.bad b { color: var(--bad); }

.mistake-list { list-style: none; margin: 0; padding: 0; }
.mistake-list li {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .55rem 0;
  border-bottom: 1px solid var(--line);
  font-size: .95rem;
  font-variant-numeric: tabular-nums;
}
.mistake-list li:last-child { border-bottom: 0; }
.mistake-list .m-prompt { flex: 1; min-width: 0; }
.mistake-list .m-given {
  color: var(--bad);
  text-decoration: line-through;
  font-weight: 600;
}
.mistake-list .m-correct { color: var(--ok); font-weight: 700; }

/* ------------------------------------------------------- Verlauf */
.run { display: flex; align-items: center; gap: .7rem; padding: .65rem 0; border-bottom: 1px solid var(--line); }
.run:last-child { border-bottom: 0; }
.run-date { font-size: .78rem; color: var(--ink-soft); width: 84px; flex: 0 0 84px; }
.run-bar { flex: 1; height: 10px; border-radius: 999px; background: var(--bad-bg); overflow: hidden; }
.run-bar i { display: block; height: 100%; background: var(--ok); }
.run-num { font-size: .85rem; font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }

.spark { display: flex; align-items: flex-end; gap: 3px; height: 46px; margin: .5rem 0 1rem; }
.spark i {
  flex: 1;
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  border-radius: 3px 3px 0 0;
  min-height: 2px;
  max-width: 16px;
}

/* --------------------------------------------------------- Rest */
.screen { display: none; }
.screen.active { display: block; animation: fade .18s ease-out; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.notice {
  border-radius: var(--radius-sm);
  padding: .6rem .8rem;
  font-size: .82rem;
  margin-bottom: .8rem;
}
.notice.warn { background: #fff4d6; color: #7a5600; }
.notice.info { background: var(--card-2); color: var(--ink-soft); }

.empty { text-align: center; color: var(--ink-soft); padding: 1.5rem 0; font-size: .9rem; }

.row-split { display: flex; gap: .6rem; }
.row-split > * { flex: 1; }

input[type="text"] {
  width: 100%;
  padding: .8rem .9rem;
  border-radius: var(--radius-sm);
  border: 2px solid var(--line);
  background: var(--card-2);
  color: var(--ink);
  font-size: 1rem;
}

@media (min-width: 560px) {
  .answers { gap: 1rem; }
  .answer { min-height: 96px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}