/* ============================================================================
   RETO · juego.css — PUZLE
   Los colores salen de las variables de cada web (--r-…).
   ========================================================================== */
.puzle-cuenta { font-weight: 700; }
.puzle-cuenta b { color: var(--r-acento-claro); }
.puzle-cabecera { display: flex; align-items: center; justify-content: center; gap: 12px; margin: 8px 0 6px; }
.puzle-guia { width: 74px; height: 74px; border-radius: 8px; border: 2px solid var(--r-borde-fuerte); object-fit: cover; }
.puzle-titulo { margin: 0; font-weight: 700; }

/* Tablero cuadrado; cada pieza se coloca con left/top (y se anima al moverse). --n lo pone juego.js */
.puzle-tablero {
  --n: 4; position: relative; width: 100%; max-width: 520px; aspect-ratio: 1; margin: 6px auto 10px;
  border-radius: 12px; background: #0b0b0b; border: 2px solid var(--r-borde-fuerte); overflow: hidden;
  touch-action: manipulation; -webkit-user-select: none; user-select: none; -webkit-touch-callout: none;
}
.puzle-tablero.cargando { cursor: progress; }
.puzle-pieza {
  position: absolute; width: calc(100% / var(--n)); height: calc(100% / var(--n)); padding: 0; margin: 0;
  border: 1px solid rgba(0, 0, 0, .55); border-radius: 4px; background-color: #222; background-repeat: no-repeat;
  cursor: pointer; transition: left .18s ease, top .18s ease, box-shadow .15s; -webkit-tap-highlight-color: transparent;
}
.puzle-pieza:focus { outline: none; }
.puzle-pieza:focus-visible { outline: 3px solid var(--r-acento-claro); outline-offset: -3px; z-index: 2; }
.puzle-pieza.elegida { box-shadow: inset 0 0 0 4px var(--r-acento-claro); z-index: 2; }
.puzle-pieza.movida { animation: puzle-brillo .35s ease; }
.puzle-hueco { background: transparent; border-color: transparent; cursor: default; }
.puzle-num {
  position: absolute; left: 4px; top: 3px; min-width: 20px; padding: 0 4px; border-radius: 6px;
  background: rgba(0, 0, 0, .65); color: #fff; font-size: 12px; font-weight: 700; line-height: 18px; text-align: center;
}
@keyframes puzle-brillo { 0% { filter: brightness(1.35); } 100% { filter: none; } }
.puzle-ayuda { text-align: center; margin: 0; }

/* Resultado */
.puzle-final { text-align: center; margin: 14px 0 6px; }
.puzle-final img { width: 100%; max-width: 260px; border-radius: 12px; border: 2px solid var(--r-borde-fuerte); display: block; margin: 0 auto 6px; }
.puzle-final p { margin: 0; font-weight: 700; }
@media (max-width: 480px) {
  .puzle-tablero { width: calc(100% + 20px); max-width: none; margin-left: -10px; margin-right: -10px; }
}