.memory-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.memory-header__brand {
  font-weight: 700;
  font-size: 1.1rem;
}

.memory-header__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.memory-header__back {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
}

.memory-header__back:hover {
  color: var(--color-primary-dark);
}

.memory-setup__intro {
  color: var(--color-text-muted);
  margin: 0 0 1.2rem;
}

/* Schüler-Modus (fester Pool per ?pool=): kompletter Header weg (kein Platz auf iPad-Viewports,
   Fullscreen-API sowieso von Safari auf iPadOS nicht zuverlässig unterstützt – daher gibt es
   dort auch keinen Vollbild-Button mehr). Nur das Spiel selbst bleibt sichtbar. */
html.is-pupil-mode .memory-header {
  display: none;
}

html.is-pupil-mode .page {
  padding: 0.8rem;
  max-width: none;
}

html.is-pupil-mode .memory-board {
  max-width: 900px;
  margin: 0 auto;
}

.memory-setup__row {
  display: flex;
  align-items: flex-end;
  gap: 1rem;
  flex-wrap: wrap;
}

.memory-setup__status {
  margin: 0.9rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.memory-setup__status.is-error {
  color: var(--color-error);
}

.pool-generator {
  margin-top: 1.4rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
}

.pool-generator summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-primary-dark);
  font-size: 0.94rem;
}

.pool-generator__body {
  margin-top: 1rem;
}

.pool-generator__intro {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  margin: 0 0 0.9rem;
}

.pool-generator__row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.9rem;
}

.pool-generator__row label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.pool-generator__row input[type="number"] {
  width: 90px;
}

.pool-generator__output {
  margin-top: 1rem;
}

.pool-generator__output pre {
  white-space: pre-wrap;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-size: 0.86rem;
  line-height: 1.5;
  max-height: 260px;
  overflow-y: auto;
}

.pool-generator__actions {
  margin: 0.6rem 0;
}

.pool-generator__hint {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.memory-stats {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  flex-wrap: wrap;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.4rem;
  margin-bottom: 1.4rem;
  box-shadow: var(--shadow);
}

.memory-stats__item {
  display: flex;
  flex-direction: column;
  min-width: 60px;
}

.memory-stats__label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  font-weight: 700;
}

.memory-stats__value {
  font-size: 1.15rem;
  font-weight: 700;
}

.memory-stats .btn {
  margin-left: auto;
}

.memory-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.9rem;
}

@media (max-width: 720px) {
  .memory-board {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.6rem;
  }
}

@media (max-width: 460px) {
  .memory-board {
    grid-template-columns: repeat(2, 1fr);
  }
}

.memory-card {
  aspect-ratio: 4 / 3;
  perspective: 800px;
  cursor: pointer;
}

.memory-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.4s cubic-bezier(0.4, 0.2, 0.2, 1);
  transform-style: preserve-3d;
}

.memory-card.is-flipped .memory-card__inner,
.memory-card.is-matched .memory-card__inner {
  transform: rotateY(180deg);
}

.memory-card__face {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0.6rem;
  backface-visibility: hidden;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: var(--shadow);
}

.memory-card__face--back {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  font-size: 1.6rem;
}

.memory-card__face--front {
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  color: var(--color-text);
  transform: rotateY(180deg);
  word-break: break-word;
}

.memory-card.is-matched .memory-card__face--front {
  border-color: var(--color-success);
  background: var(--color-success-bg);
  color: var(--color-success);
}

.memory-card.is-mismatch .memory-card__face--front {
  border-color: var(--color-error);
  background: var(--color-error-bg);
}

.memory-card.is-matched {
  cursor: default;
}

.memory-win {
  text-align: center;
}

.memory-win__actions {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  margin-top: 1rem;
  flex-wrap: wrap;
}