/* Jigsaw Puzzle styles */

/* Base Placeholders */
.collected-piece.placeholder {
  visibility: visible;
  opacity: 0.3;
  background: rgba(255, 255, 255, 0.05);
  /* Explicit border props to override generic */
  border-width: 1px;
  border-style: dashed;
  border-color: var(--text-muted);
  pointer-events: auto;
  cursor: default; /* Arrow for empty placeholders */
  box-shadow: none; /* Ensure no shadow */
  transform: none; /* Ensure no scale */
}

/* Selected State - Must come AFTER placeholder or have higher specificity if we want selection to show on placeholders (usually we don't select placeholders but just in case) */
/* Selected State - Updated to use ::after for glow to avoid overflow:hidden clipping */
.collected-piece.selected,
.sudoku-chunk-slot.selected {
  /* border-color handled by parent border but we can re-force it */
  border-color: var(--accent-color) !important;
  transform: scale(1.1);
  z-index: 1510;
  opacity: 1;
}

.collected-piece.selected::after,
.sudoku-chunk-slot.selected::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: inherit;
  box-shadow: 0 0 15px var(--accent-color);
  pointer-events: none;
  z-index: -1; /* Place behind content if possible, wait, piece is opaque */
}

/* If piece is opaque, shadow needs to be outside. 
   To be outside WHILE being a child of overflow:hidden parent, it's impossible.
   So we MUST use overflow:visible during selection OR use a different approach.
*/
.jigsaw-mode .collected-piece.selected,
.jigsaw-mode .sudoku-chunk-slot.selected {
  overflow: visible !important;
}

/* Jigsaw Mode Transitions */
.jigsaw-mode .collected-piece,
.jigsaw-mode .sudoku-chunk-slot {
  /* overflow: hidden is critical for rounded corners to work correctly on the piece content.
     The selection glow (box-shadow) is now handled by an ::after pseudo-element 
     to avoid being clipped by this property. */
  overflow: hidden !important;
}

/* Internal Grid Rounding Fix (Ensure it overrides Sudoku-mode's possible 0px) */
.jigsaw-mode .mini-sudoku-grid {
  border-radius: 8px !important;
  overflow: hidden !important;
}

/* Jigsaw Mode Transitions */
/* Default Jigsaw Cursors */
.jigsaw-mode .collected-piece {
  cursor: pointer; /* Selectable pieces */
}
.jigsaw-mode .collected-piece.placeholder {
  cursor: default; /* Not selectable */
}

.jigsaw-mode .sudoku-chunk-slot {
  cursor: default; /* Not selectable if empty */
}
.jigsaw-mode .sudoku-chunk-slot.filled {
  cursor: pointer; /* Selectable piece on board */
}

/* Active Selection Cursors: Everything becomes a target */
.jigsaw-mode.selection-active .collected-piece.placeholder {
  cursor: pointer; /* Valid Drop Target */
}

.jigsaw-mode.selection-active .sudoku-chunk-slot {
  cursor: pointer; /* Valid Move/Swap Target */
}

/* Locked Center Place always locked during Jigsaw */
.jigsaw-mode .sudoku-chunk-slot[data-slot-index="4"] {
  cursor: not-allowed;
  position: relative; /* Ensure pseudo-element is positioned relative to this */
}

/* Overlay effect to ensure it is visible ON TOP of the piece */
.jigsaw-mode .sudoku-chunk-slot[data-slot-index="4"]::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.05); /* Much lighter for Light Mode */
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.2); /* Softer shadow */
  pointer-events: none; /* Let clicks pass through (though slot is locked anyway) */
  z-index: 10;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px; /* Match the parent slot's curvature */
}

/* User-Locked & Center Piece Style (v1.7.3: Subtle Overlay Lock) */
.jigsaw-mode .sudoku-chunk-slot.user-locked,
.jigsaw-mode .sudoku-chunk-slot.fixed-piece,
.jigsaw-mode .sudoku-chunk-slot[data-slot-index="4"] {
  position: relative;
}

.jigsaw-mode .sudoku-chunk-slot.user-locked {
  border: 2px solid var(--accent-color) !important;
}

/* Clear everything inside to show our overlay lock correctly if needed, 
   but we want to PRESERVE the piece color. So we don't force transparency anymore. */

.jigsaw-mode .sudoku-chunk-slot.user-locked .mini-sudoku-grid::before,
.jigsaw-mode .sudoku-chunk-slot.fixed-piece .mini-sudoku-grid::before,
.jigsaw-mode .sudoku-chunk-slot[data-slot-index="4"] .mini-sudoku-grid::before {
  display: none; /* Remove background lock */
}

.jigsaw-mode .sudoku-chunk-slot.user-locked .mini-sudoku-grid::after,
.jigsaw-mode .sudoku-chunk-slot.fixed-piece .mini-sudoku-grid::after,
.jigsaw-mode .sudoku-chunk-slot[data-slot-index="4"] .mini-sudoku-grid::after {
  content: "🔒";
  display: flex;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  opacity: 0.12; /* Subtle watermark */
  color: #888;
  z-index: 10; /* OVER numbers but very transparent */
  pointer-events: none;
  filter: grayscale(1);
}

/* Tutorial-specific: Smaller lock icon for fixed pieces and user-locked pieces */
.jigsaw-mode .sudoku-chunk-slot.fixed-piece .mini-sudoku-grid::after,
#tutorial-game-area .sudoku-chunk-slot.user-locked .mini-sudoku-grid::after {
  font-size: 3.2rem !important;
  opacity: 0.18 !important;
}

/* Dark Mode adjustment */
.dark-mode .jigsaw-mode .sudoku-chunk-slot.user-locked .mini-sudoku-grid::after,
.dark-mode .jigsaw-mode .sudoku-chunk-slot.fixed-piece .mini-sudoku-grid::after,
.dark-mode
  .jigsaw-mode
  .sudoku-chunk-slot[data-slot-index="4"]
  .mini-sudoku-grid::after {
  opacity: 0.1;
  color: #fff;
}

.jigsaw-mode .sudoku-chunk-slot.user-locked .mini-sudoku-grid,
.jigsaw-mode .sudoku-chunk-slot.fixed-piece .mini-sudoku-grid,
.jigsaw-mode .sudoku-chunk-slot[data-slot-index="4"] .mini-sudoku-grid {
  /* Remove dull filters */
  filter: none !important;
}

.jigsaw-mode .sudoku-chunk-slot.user-locked::after {
  display: none; /* Remove old floating lock */
}

/* Dark Mode Override for Center Slot */
.dark-mode .jigsaw-mode .sudoku-chunk-slot[data-slot-index="4"]::after {
  background: rgba(0, 0, 0, 0.3); /* Darker for proper contrast in Dark Mode */
  box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.6);
}

/* Fixed Pieces (immovable, no accent border, no hover) */
.jigsaw-mode .sudoku-chunk-slot.fixed-piece {
  cursor: not-allowed;
  position: relative;
}

/* Darkening overlay for fixed tutorial pieces */
.jigsaw-mode .sudoku-chunk-slot.fixed-piece::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.2); /* Noticeably darker for tutorial */
  box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.3);
  pointer-events: none;
  z-index: 10;
  border-radius: 10px;
}

.dark-mode .jigsaw-mode .sudoku-chunk-slot.fixed-piece::after {
  background: rgba(0, 0, 0, 0.4);
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.6);
}

.memory-board,
.collected-piece,
.collected-wrapper,
.sudoku-chunk-slot {
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Hover Feedback */
@media (hover: hover) {
  /* Panel Pieces Hover */
  .jigsaw-mode .collected-piece:not(.placeholder):not(.selected):hover {
    transform: scale(1.05);
    z-index: 1500;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  }

  /* Board Pieces Hover */
  .jigsaw-mode
    .sudoku-chunk-slot.filled:not(.selected):not([data-slot-index="4"]):not(.user-locked):not(.fixed-piece):hover {
    transform: scale(1.05);
    z-index: 1500;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  }

  /* Selected Pieces Hover - Even higher to stay on top */
  .jigsaw-mode .collected-piece.selected:hover,
  .jigsaw-mode .sudoku-chunk-slot.selected:hover {
    transform: scale(1.15);
    z-index: 1600;
  }
}

/* Standard Desktop Jigsaw Expansion (769px - 1099px, Height > 850px) */

/* Mobile Adjustments for Lock Icon */
@media (max-width: 768px) {
  .jigsaw-mode .sudoku-chunk-slot.user-locked .mini-sudoku-grid::after,
  .jigsaw-mode .sudoku-chunk-slot[data-slot-index="4"] .mini-sudoku-grid::after {
    font-size: 3rem; /* Reduced for mobile parity */
  }
}

/* Large Desktop Jigsaw Expansion (Scale Up only if there is enough height) */
/* Standard Desktop Jigsaw (Responsive) */
@media (min-width: 769px) {
  .jigsaw-mode .memory-board,
  .sudoku-mode .memory-board,
  .peaks-mode .memory-board {
    /* Use clamp/min to handle smaller desktops gracefully without media queries */
    width: min(420px, 45vw) !important;
    height: auto !important;
    aspect-ratio: 1/1 !important;
  }

  .jigsaw-mode .collected-piece {
    width: min(99px, 10vw) !important;
    height: auto !important;
    aspect-ratio: 1/1 !important;
    font-size: clamp(1rem, 2vw, 2rem) !important;
  }

  .jigsaw-mode .collected-wrapper,
  .sudoku-mode .collected-wrapper,
  .peaks-mode .collected-wrapper {
    gap: 15px;
    padding: 10px;
  }

  /* Adjust layout to fit larger board */
  .jigsaw-mode .memory-grid-layout,
  .sudoku-mode .memory-grid-layout,
  .peaks-mode .memory-grid-layout {
    gap: 2rem;
    column-gap: 4rem;
    grid-template-columns: 1fr auto 1fr !important; /* Flexible sides, board automatic */
    justify-content: center;
  }
}

/* Drag & Drop Styles */
.dragging-clone {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.9;
  transform: scale(1.1);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  /* Use explicit container sizing for the inner grid */
  display: block;
  overflow: hidden;
  border-radius: 10px; /* Round the piece while dragging */
  transition:
    width 0.4s ease,
    height 0.4s ease,
    transform 0.4s ease;
}

.dragging-clone .mini-sudoku-grid {
  width: 100% !important;
  height: 100% !important;
  container-type: size !important; /* Ensure internal numbers resolve cqw correctly */
}

/* Override Selected State during Drag (No glow/scale on the empty hole) */
.collected-piece.selected.dragging-source,
.sudoku-chunk-slot.selected.dragging-source {
  border-color: transparent !important;
  box-shadow: none !important;
  transform: none !important;
  z-index: auto !important;
}

/* Force background to appear "empty" when lifting the piece */
/* Case A: Board Slot -> Opaque Grey */
.sudoku-chunk-slot.filled.dragging-source {
  background: var(--bg-tertiary) !important;
}

/* Case B: Panel Slot -> Transparent Dashed (Matches Placeholder) */
.collected-piece.dragging-source {
  background: rgba(255, 255, 255, 0.05) !important;
  border: 1px dashed var(--text-muted) !important;
  opacity: 0.5 !important; /* Slightly dimmed to match placeholder vibe */
}

.drop-hover {
  background-color: rgba(255, 255, 255, 0.2);
  border-color: var(--accent-color) !important;
}

/* Fix for Self-Hover: Allow drop-hover to win against dragging-source background */
/* Board: Highlight Background + Border */
.sudoku-chunk-slot.filled.dragging-source.drop-hover {
  background-color: rgba(255, 255, 255, 0.2) !important;
  border-color: var(--accent-color) !important;
  opacity: 1 !important;
}

/* Panel: Highlight Border ONLY (Keep background subtle) for ALL panel slots */
.collected-piece.drop-hover,
.collected-piece.dragging-source.drop-hover {
  background: rgba(
    255,
    255,
    255,
    0.05
  ) !important; /* Keep original placeholder look */
  border-color: var(--accent-color) !important;
}

/* Ensure self-hover matches opacity of placeholders */
.collected-piece.dragging-source.drop-hover {
  opacity: 0.3 !important;
}

/* Error Feedback Styles */
@keyframes shake-red {
  0% {
    transform: translate(1px, 1px) rotate(0deg);
    box-shadow: 0 0 10px red;
    border-color: red;
  }
  10% {
    transform: translate(-1px, -2px) rotate(-1deg);
  }
  20% {
    transform: translate(-3px, 0px) rotate(1deg);
  }
  30% {
    transform: translate(3px, 2px) rotate(0deg);
  }
  40% {
    transform: translate(1px, -1px) rotate(1deg);
  }
  50% {
    transform: translate(-1px, 2px) rotate(-1deg);
  }
  60% {
    transform: translate(-3px, 1px) rotate(0deg);
  }
  70% {
    transform: translate(3px, 1px) rotate(-1deg);
  }
  80% {
    transform: translate(-1px, -1px) rotate(1deg);
  }
  90% {
    transform: translate(1px, 2px) rotate(0deg);
  }
  100% {
    transform: translate(1px, -2px) rotate(-1deg);
    box-shadow: 0 0 10px red;
    border-color: red;
  }
}

.board-error {
  animation: shake-red 0.5s;
  border-color: red !important;
  box-shadow: 0 0 15px red !important;
}

/* Mark specific number as duplicate */
.mini-cell.error-number {
  color: red !important;
  font-weight: bold;
}

/* Ensure board and button stack vertically on desktop */
#game-section.jigsaw-mode .board-wrapper {
  flex-direction: column;
  align-items: center; /* Horizontal center */
  justify-content: flex-start; /* Vertical top align */
}

/* Jigsaw Reset Button */
.jigsaw-controls {
  display: none;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 15px;
  width: 100%;
  opacity: 0;
  transition: opacity 0.5s ease;
  z-index: 100;
}

#game-section.jigsaw-mode .jigsaw-controls {
  display: flex;
  opacity: 1;
}

/* No special grid override needed for desktop now since it's inside board-wrapper again */

.btn-jigsaw-reset {
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 12px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(10px);
}

/* Dark Mode Overrides for Reset Button */
.dark-mode .btn-jigsaw-reset {
  background: #2d333b; /* Nordic Dark Lead */
  border-color: #444c56; /* Subtle border */
  color: #adbac7; /* Pearl grey */
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn-jigsaw-reset:hover {
  background: var(--accent-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  border-color: transparent;
}

.dark-mode .btn-jigsaw-reset:hover {
  background: var(--accent-color);
  color: #1e2329; /* Dark text on bright accent */
}

.btn-jigsaw-reset:active {
  transform: translateY(0);
}

.btn-jigsaw-action {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  border-radius: 12px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(10px);
  padding: 0; /* Reset for flex centering */
}

.dark-mode .btn-jigsaw-action {
  background: #2d333b;
  border-color: #444c56;
  color: #adbac7;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn-jigsaw-action:hover {
  background: var(--accent-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  border-color: transparent;
}

.dark-mode .btn-jigsaw-action:hover {
  background: var(--accent-color);
  color: #1e2329;
}

.btn-jigsaw-action:active {
  transform: translateY(0);
}

.btn-jigsaw-action:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
  transform: none !important;
  box-shadow: none !important;
}

@media (max-width: 768px) {
  /* On mobile, we use display: contents to "unroll" board-wrapper 
     so its children become direct children of the main column layout. */
  .jigsaw-mode .board-wrapper {
    display: contents;
  }

  /* Now we can order them independently */
  .jigsaw-mode .memory-board {
    order: 1;
    margin-top: 10px;
    margin-bottom: 10px;
  }

  .jigsaw-controls {
    order: 10; /* Put it at the bottom on mobile */
    margin-top: 20px;
    margin-bottom: 20px;
    padding-bottom: 20px;
  }

  .btn-jigsaw-reset {
    padding: 10px 24px;
    font-size: 0.9rem;
    flex: 1; /* Allow reset to take more space */
    max-width: 200px;
  }

  .btn-jigsaw-action {
    width: 42px;
    height: 42px;
    font-size: 1.1rem;
  }
}