/* 2048 im ISSON-Stil „Lieferschein“. Farben und Schriften setzt spiele.css. */

* { box-sizing: border-box; }

body {
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 620px;
  margin: 0 auto;
  padding: 28px 16px 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ---------- Kopfzeile ---------- */

.app__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px 20px;
  border-bottom: 2px solid var(--tinte);
  padding-bottom: 14px;
}

.app__title {
  margin: 0;
  font-family: var(--schrift-titel);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--tinte);
}

.app__meta { display: flex; flex-wrap: wrap; gap: 8px 22px; }

.meta__item { display: flex; flex-direction: column; gap: 2px; }

.meta__label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-leise);
}

.meta__value {
  font-size: 1.25rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--tinte);
}

/* ---------- Spielfeld ---------- */

.board__frame {
  position: relative;
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  aspect-ratio: 1 / 1;
  background: var(--papier);
  border: 2px solid var(--tinte);
  padding: 8px;
}

#board {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--papier);
  touch-action: none;
}

.overlay, .banner {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(255, 255, 255, 0.35);
  text-align: center;
}

/* Meldung als kleiner Beleg über dem Feld, das Spielfeld bleibt lesbar */
.overlay__karte {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  max-width: 320px;
  padding: 18px 22px;
  background: var(--papier);
  border: 2px solid var(--tinte);
}


.overlay[hidden] { display: none; }

.overlay__title, .banner__text {
  margin: 0;
  font-family: var(--schrift-titel);
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--tinte);
}

.overlay__hint { margin: 0; max-width: 34ch; color: var(--text-leise); font-size: 0.95rem; }

.overlay__actions, .banner__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }

/* ---------- Punkte-Anzeige nach einem Zug ---------- */

.score-pop {
  position: absolute;
  left: 50%;
  top: 18%;
  transform: translateX(-50%);
  padding: 0 0.3em;
  font-size: 1.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--tinte);
  background: linear-gradient(transparent 58%, var(--cyan) 58%, var(--cyan) 92%, transparent 92%);
  pointer-events: none;
  animation: score-pop 0.7s var(--ease) forwards;
}

@keyframes score-pop {
  0%   { opacity: 0; transform: translate(-50%, 14px) scale(0.8); }
  20%  { opacity: 1; transform: translate(-50%, 0) scale(1.05); }
  100% { opacity: 0; transform: translate(-50%, -34px) scale(1); }
}

.button {
  min-height: 44px;
  margin-top: 6px;
  padding: 0.6rem 1.1rem;
  font: 600 0.95rem/1.2 var(--schrift-text);
  color: var(--papier);
  background: var(--tinte);
  border: 2px solid var(--tinte);
  border-radius: 0;
  cursor: pointer;
  transition: background-color 180ms var(--ease), color 180ms var(--ease);
}

.button:hover { background: var(--papier); color: var(--tinte); }

.button--undo { color: var(--tinte); background: var(--papier); }
.button--undo:hover { background: var(--tinte); color: var(--papier); }
.app__meta .button--undo { margin-top: 0; align-self: center; }
.button--undo:disabled { color: var(--text-leise); border-color: var(--linie); background: var(--papier); cursor: default; }

/* ---------- Tastenlegende ---------- */

.legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 24px; padding-top: 4px; }

.legend__copyright { flex-basis: 100%; text-align: center; font-size: 0.78rem; color: var(--text-leise); }

.legend__group { display: inline-flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 5px; font-size: 0.85rem; color: var(--text-leise); }

kbd {
  display: inline-block;
  min-width: 22px;
  padding: 2px 6px;
  font: 600 0.75rem/1.3 var(--schrift-text);
  text-align: center;
  color: var(--tinte);
  background: var(--papier);
  border: 1px solid var(--tinte);
  border-radius: 0;
}

@media (max-width: 420px) {
  .app { padding: 20px 16px 32px; }
  .app__meta { gap: 8px 16px; }
  .meta__value { font-size: 1.1rem; }
  .legend { gap: 8px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .score-pop { animation: none; opacity: 0; }
}