/* ---------------------------------------------------------------------------
   The cards themselves.

   Each card carries both faces at once and flips in 3D, which means turning a
   card over is a CSS state change rather than a re-render — and Turbo's morph
   can leave the element exactly where it is while the browser animates.
   --------------------------------------------------------------------------- */

.card {
  perspective: 900px;
  transition:
    transform 0.30s var(--ease-out),
    filter 0.2s var(--ease-out);
  will-change: transform;
  cursor: default;
  touch-action: none;
}

.card.is-playable { cursor: grab; }
.card.is-dragging { cursor: grabbing; transition: none; z-index: 900 !important; }
.card.is-dragging .card__inner { box-shadow: var(--shadow-lift); transform: scale(1.03); }

.card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  transform-style: preserve-3d;
  box-shadow: var(--shadow-card);
  transition: transform 0.42s var(--ease-out), box-shadow 0.2s var(--ease-out);
}

.card.is-down .card__inner { transform: rotateY(180deg); }

/* Two dozen shadows stacked in one spot turn into a smudge. Face-down cards
   get a hairline instead. */
.card.is-down .card__inner {
  box-shadow: 0 1px 2px rgba(16, 24, 20, 0.12);
}

.card__face {
  position: absolute;
  inset: 0;
  border-radius: calc(var(--card-w) * 0.11);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  overflow: hidden;
}

/* Front ------------------------------------------------------------------- */

.card__face--front {
  background: linear-gradient(178deg, #ffffff 0%, #fbfbfa 100%);
  border: 1px solid rgba(20, 30, 25, 0.10);
  color: #16181a;
  display: grid;
  grid-template-rows: auto 1fr;
  padding: calc(var(--card-w) * 0.06) calc(var(--card-w) * 0.07);
}

.card--red .card__face--front { color: #d7382e; }

.card__index {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 0.98;
  font-family: var(--font-rounded);
  font-weight: 600;
  letter-spacing: -0.04em;
}

.card__index--start { justify-self: start; }

.card__rank { font-size: calc(var(--card-w) * 0.25); }
.card__suit { font-size: calc(var(--card-w) * 0.155); line-height: 1; margin-top: 1px; }

.card__center {
  place-self: center;
  font-size: calc(var(--card-w) * 0.42);
  line-height: 1;
  opacity: 0.88;
}

/* Back -------------------------------------------------------------------- */

.card__face--back {
  transform: rotateY(180deg);
  background:
    repeating-linear-gradient(
      45deg,
      rgba(255, 255, 255, 0.055) 0 3px,
      transparent 3px 6px
    ),
    linear-gradient(150deg, #4a6d78 0%, #35525c 48%, #2b434c 100%);
  border: 1px solid rgba(10, 20, 24, 0.35);
  display: grid;
  place-items: center;
}

@media (prefers-color-scheme: dark) {
  .card__face--front {
    background: linear-gradient(178deg, #f7f7f6 0%, #ececeb 100%);
    border-color: rgba(0, 0, 0, 0.35);
  }

  .card__face--back {
    background:
      repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.05) 0 3px, transparent 3px 6px),
      linear-gradient(150deg, #33505a 0%, #24393f 48%, #1b2b30 100%);
  }
}

.card__emblem {
  width: 52%;
  height: 62%;
  border-radius: calc(var(--card-w) * 0.06);
  border: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.07);
}

/* States ------------------------------------------------------------------ */

.card.is-hinted .card__inner {
  outline: 3px solid var(--accent);
  outline-offset: -1px;
  animation: pulse 1.1s var(--ease-out) 2;
}

.card.is-rejected { animation: shake 0.34s var(--ease-out); }

@keyframes shake {
  10%, 90% { margin-left: -3px; }
  30%, 70% { margin-left: 4px; }
  50%      { margin-left: -2px; }
}

/* The winning flourish: every card lifts a touch once the game is solved. */
.board.is-won .card:not(.is-down) .card__inner {
  animation: settle 0.6s var(--ease-spring) both;
}

@keyframes settle {
  from { transform: translateY(6px) scale(0.98); }
  to   { transform: none; }
}