/* ═══════════════════════════════════════════════════
   game.css — game screen, board grid, arrow cells,
              HUD, footer, win overlay, animations
════════════════════════════════════════════════════ */

/* ── Game screen layout ─────────────────────────── */
#screen-game {
  display: flex;
  flex-direction: column;
  /* Override generic screen padding — manage it per-area */
  padding: 0;
  overflow: hidden;
}

/* ── HUD ────────────────────────────────────────── */
.game-hud {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: center;
  gap: var(--sp-2);
  padding-block: var(--sp-3);
  padding-inline: var(--sp-4);
  padding-top: calc(var(--safe-top) + var(--sp-3));
  background-color: var(--c-surface);
  border-block-end: 1px solid var(--c-border);
  flex-shrink: 0;
}

.hud-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.hud-item--center {
  align-items: center;
}

.hud-item:last-child {
  align-items: flex-end;
}

.hud-label {
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  font-weight: var(--fw-medium);
  letter-spacing: 0.04em;
}

.hud-value {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--c-text);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  /* Reserve space for up to 4 digits to prevent layout shift */
  min-width: 2.5ch;
  text-align: center;
  transition: color var(--dur-fast) var(--ease-out);
}

#hud-score { color: var(--c-score); }

/* Score pop animation */
.hud-value.score-pop {
  animation: score-pop var(--dur-slow) var(--ease-spring);
}
@keyframes score-pop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.35); color: var(--c-accent); }
  100% { transform: scale(1); }
}

/* ── Board wrap ─────────────────────────────────── */
.game-board-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-4);
  overflow: hidden;
  /* Clamp height so the HUD and footer are always visible */
  min-height: 0;
}

/* ── Game board grid ────────────────────────────── */
.game-board {
  display: grid;
  /* --cols set inline by JS */
  grid-template-columns: repeat(var(--cols, 4), 1fr);
  gap: 3px;
  background-color: var(--c-border);
  border: 3px solid var(--c-border);
  border-radius: var(--r-md);
  /* Scale to fill available space without overflowing */
  width: min(
    calc(100vw - var(--sp-8)),
    calc(var(--vh) - 220px - var(--safe-top) - var(--safe-bottom))
  );
  aspect-ratio: 1 / 1;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  user-select: none;
}

/* ── Individual cells ───────────────────────────── */
.cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--c-surface);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transition:
    background-color var(--dur-fast) var(--ease-out);
  /* Aspect ratio maintained by the grid */
  min-width: 0;
  min-height: 0;
}

.cell:active { background-color: var(--c-surface-alt); }

.cell:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: -3px;
  z-index: 1;
}

/* Target cell: the goal */
.cell--target {
  background-color: var(--c-target-soft);
  cursor: default;
}

/* Solved cell */
.cell--solved {
  background-color: var(--c-solved-soft);
}

/* Hinted cell (briefly highlighted) */
.cell--hint {
  animation: hint-pulse 0.8s var(--ease-out) 2;
}
@keyframes hint-pulse {
  0%,100% { background-color: var(--c-surface); }
  50%      { background-color: var(--c-accent-soft); }
}

/* Arrow glyph inside each cell */
.cell-arrow {
  font-size: clamp(1.1rem, 4.5vw, 2rem);
  line-height: 1;
  color: var(--c-text);
  display: block;
  /* Rotation set via CSS custom property --deg */
  transform: rotate(var(--deg, 0deg));
  transition: transform var(--dur-normal) var(--ease-spring);
  will-change: transform;
}

/* Arrow color states */
.cell--solved   .cell-arrow { color: var(--c-solved); }
.cell--target   .cell-arrow { color: var(--c-target); font-size: clamp(1rem, 4vw, 1.8rem); }

/* Tap feedback — the cell briefly scales */
.cell.tapped .cell-arrow {
  animation: arrow-tap var(--dur-fast) var(--ease-spring);
}
@keyframes arrow-tap {
  0%   { transform: rotate(var(--deg, 0deg)) scale(1); }
  50%  { transform: rotate(var(--deg, 0deg)) scale(0.7); }
  100% { transform: rotate(var(--deg, 0deg)) scale(1); }
}

/* Row/column solve flash */
.cell--flash {
  animation: cell-flash 0.4s var(--ease-out) forwards;
}
@keyframes cell-flash {
  0%   { background-color: var(--c-accent-soft); }
  100% { background-color: var(--c-solved-soft); }
}

/* ── Progress bar in footer ─────────────────────── */
.game-footer {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding-block: var(--sp-3);
  padding-inline: var(--sp-4);
  padding-bottom: calc(var(--safe-bottom) + var(--sp-3));
  background-color: var(--c-surface);
  border-block-start: 1px solid var(--c-border);
  flex-shrink: 0;
}

.game-progress-wrap {
  flex: 1;
  height: 8px;
  background-color: var(--c-surface-alt);
  border-radius: var(--r-full);
  overflow: hidden;
}

.game-progress-bar {
  height: 100%;
  background-color: var(--c-accent);
  border-radius: inherit;
  width: 0%;
  transition: width var(--dur-normal) var(--ease-out);
}

/* Green when complete */
.game-progress-bar--done {
  background-color: var(--c-solved);
}

/* ── Win overlay ────────────────────────────────── */
.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 200;
  padding: var(--sp-6);
  transition:
    opacity   var(--dur-normal) var(--ease-out),
    transform var(--dur-normal) var(--ease-out);
}

.overlay--hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.95);
}

.overlay-card {
  background-color: var(--c-surface);
  border-radius: var(--r-xl);
  padding: var(--sp-8);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-4);
  max-width: 340px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--c-border);
  animation: card-in var(--dur-slow) var(--ease-spring);
}

@keyframes card-in {
  from { transform: scale(0.85) translateY(20px); opacity: 0; }
  to   { transform: scale(1) translateY(0);       opacity: 1; }
}

.win-icon {
  font-size: 3.5rem;
  color: var(--c-accent);
  animation: star-pop 0.6s var(--ease-spring) 0.2s both;
}
@keyframes star-pop {
  from { transform: scale(0) rotate(-30deg); opacity: 0; }
  to   { transform: scale(1) rotate(0deg);   opacity: 1; }
}

.win-title {
  font-size: var(--fs-2xl);
  color: var(--c-accent);
  text-align: center;
}

.win-level-label {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  text-align: center;
}

.win-stats {
  display: flex;
  gap: var(--sp-4);
  width: 100%;
  justify-content: center;
}

.win-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-1);
  flex: 1;
}

.win-stat-label {
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  font-weight: var(--fw-medium);
}

.win-stat-value {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--c-score);
  font-variant-numeric: tabular-nums;
}

.win-actions {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  width: 100%;
}

.win-actions .btn { width: 100%; }

/* ── Responsive tweaks ──────────────────────────── */

/* Wider screens — let the board breathe a bit more */
@media (min-width: 480px) {
  .game-board {
    width: min(
      420px,
      calc(var(--vh) - 220px - var(--safe-top) - var(--safe-bottom))
    );
  }
}

/* Very small screens — compact HUD */
@media (max-height: 600px) {
  .game-hud { padding-block: var(--sp-2); }
  .hud-value { font-size: var(--fs-md); }
  .game-footer { padding-block: var(--sp-2); }
  .game-board-wrap { padding: var(--sp-2); }
}