/* Sudoku Main Layout - Unified Vertical Stack for ALL devices */
.sudoku-mode .memory-grid-layout,
.peaks-mode .memory-grid-layout {
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important; /* Horizontal centering */
  justify-content: flex-start !important; /* Pull to top */
  gap: 15px !important; /* Tight spacing "just below board" */
  width: 100% !important;
  max-width: 1000px !important;
  margin: 0 auto !important;
  padding-top: 0.2rem !important; /* v2.8.0: Compact top for standard screens */
}

@media (min-width: 801px) and (min-height: 880px) {
  .sudoku-mode .memory-grid-layout,
  .peaks-mode .memory-grid-layout {
    padding-top: 0 !important;
  }
}

.sudoku-mode .memory-grid-layout,
.peaks-mode .memory-grid-layout {
  /* Swapped Contrast Logic: Light mode gets DARK lines */
  --sudoku-grid-line: #000;
  --sudoku-inner-line: #bbb;
}

/* Correct selector: space between body class and game class */
.dark-mode .sudoku-mode .memory-grid-layout,
.dark-mode .peaks-mode .memory-grid-layout {
  /* Swapped Contrast Logic: Dark mode gets LIGHT lines */
  --sudoku-grid-line: #fff;
  --sudoku-inner-line: #444;
}

/* Also swap the board background which forms the "thick" lines (gap) 
   But KEEP the outer border consistent with the background */
/* Also swap the board background which forms the "thick" lines (gap) 
   But KEEP the outer border consistent with the background */
.sudoku-mode .memory-board,
.peaks-mode .memory-board {
  background: var(--bg-secondary) !important; /* Back to theme background */
  padding: 0 !important;
  gap: 0 !important; /* REMOVE GAP: Borders provide better precision */
  border: 4px solid var(--bg-secondary) !important;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 1/1 !important; /* REINFORCE SYMMETRY */
}

/* Remove internal rounding to prevent background bleed at edges */
/* Remove internal rounding to prevent background bleed at edges */
.sudoku-mode .sudoku-chunk-slot,
.sudoku-mode .mini-sudoku-grid,
.peaks-mode .sudoku-chunk-slot,
.peaks-mode .mini-sudoku-grid {
  border-radius: 0 !important;
  box-sizing: border-box !important;
}

/* PIXEL-PERFECT SYMMETRY: Use borders instead of gaps to avoid rounding errors */
/* PIXEL-PERFECT SYMMETRY: Use borders instead of gaps to avoid rounding errors */
.sudoku-mode .sudoku-chunk-slot,
.peaks-mode .sudoku-chunk-slot {
  border-right: 3px solid var(--sudoku-grid-line);
  border-bottom: 3px solid var(--sudoku-grid-line);
}

/* Remove borders on the edges of the board */
/* Remove borders on the edges of the board */
.sudoku-mode .sudoku-chunk-slot:nth-child(3n),
.peaks-mode .sudoku-chunk-slot:nth-child(3n) {
  border-right: none !important;
}

.sudoku-mode .sudoku-chunk-slot:nth-child(n + 7),
.peaks-mode .sudoku-chunk-slot:nth-child(n + 7) {
  border-bottom: none !important;
}

/* Ensure side panels and cards are completely gone */
/* Ensure side panels and cards are completely gone */
.sudoku-mode .collected-zone,
.sudoku-mode .collected-wrapper,
.sudoku-mode .cards-area,
.peaks-mode .collected-zone,
.peaks-mode .collected-wrapper,
.peaks-mode .cards-area {
  display: none !important;
}

/* Center elements within the stack */
/* Center elements within the stack */
.sudoku-mode .board-wrapper,
.peaks-mode .board-wrapper {
  order: 1 !important;
  width: auto !important;
  margin: 0 !important;
  padding: 0 !important;
}

.sudoku-controls {
  --btn-size: 62px;
  --btn-gap: 6px;
  --grid-width: calc(var(--btn-size) * 3 + var(--btn-gap) * 2);

  order: 2 !important;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--btn-gap);
  width: var(--grid-width);
  margin: 0 auto 5px auto !important;
  animation: slideUp 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.sudoku-controls.hidden {
  display: none !important;
}

/* Both rows share the same width */
.control-row {
  display: flex;
  justify-content: center;
  gap: var(--btn-gap);
  width: var(--grid-width);
}

/* Action buttons: 4 in a row, each equal size */
.btn-sudoku-action {
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.2s ease;
  width: var(--btn-size);
  height: var(--btn-size);
  flex: none;
  display: flex;
  justify-content: center;
  align-items: center;
}

.btn-sudoku-action:hover {
  background: color-mix(in srgb, var(--accent-color) 15%, var(--bg-tertiary));
  border-color: var(--accent-color);
}

.btn-sudoku-action:active {
  transform: scale(0.95);
  background: color-mix(in srgb, var(--accent-color) 25%, var(--bg-tertiary));
}

.btn-sudoku-action.active {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* Number grid: 3x3 */
.numbers {
  display: grid;
  grid-template-columns: repeat(3, var(--btn-size));
  grid-template-rows: repeat(3, var(--btn-size));
  gap: var(--btn-gap);
  width: var(--grid-width);
}

.sudoku-num {
  width: var(--btn-size);
  height: var(--btn-size);
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  justify-content: center;
  align-items: center;

}

/* Mobile: slightly smaller buttons */
@media (max-width: 768px) {
  .sudoku-mode .memory-grid-layout,
  .peaks-mode .memory-grid-layout {
    flex: 1 !important;
    min-height: 0;
    width: 100% !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: flex-start !important;
    align-items: center !important;
    gap: 8px !important;
    padding-bottom: 2px !important;
    max-height: calc(100dvh - var(--header-height) - var(--footer-height)) !important;
    overflow: hidden !important;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* Ultra-Short Screens */
  @media (max-height: 660px) {
    .sudoku-mode .memory-grid-layout,
    .peaks-mode .memory-grid-layout {
      gap: 4px !important;
      padding-bottom: 0 !important;
      justify-content: space-between !important;
    }
    .sudoku-controls {
      --btn-size: clamp(44px, 12vw, 54px);
    }
  }

  .sudoku-controls {
    --btn-size: clamp(52px, 15vw, 64px);
  }
}

/* Desktop */
@media (min-width: 769px) {
  .sudoku-mode .memory-grid-layout,
  .peaks-mode .memory-grid-layout {
    flex: 1 !important;
    min-height: 0;
    display: flex !important;
    flex-direction: column !important;
    justify-content: flex-start !important;
    gap: 10px !important;
    padding-bottom: 30px !important;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .sudoku-controls {
    --btn-size: 58px;
    align-self: center;
  }

  /* High-Res Pad */
  @media (min-height: 880px) and (min-width: 801px) {
    .sudoku-controls {
      --btn-size: 64px;
    }
  }
}




.dark-mode .sudoku-num {
  background: #333;
  border-color: #444;
  color: #eee;
}

.sudoku-num:hover {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
  transform: scale(1.1);
}

.sudoku-num:active {
  transform: scale(0.95);
}

/* Feedback: Number is present in selected cell */
.sudoku-num.key-present {
  background: #e2e8f0; /* Light slate */
  color: var(--text-main);
  border-color: #cbd5e1;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.dark-mode .sudoku-num.key-present {
  background: #475569; /* Slate 600 */
  color: white;
  border-color: #64748b;
}

/* Disabled Key (Notes Constraint) */
.sudoku-num.key-disabled {
  opacity: 0.2;
  pointer-events: none;
  filter: grayscale(1);
}

/* Completed Number (9 instances) */
.sudoku-num.key-completed {
  opacity: 0.5;
  background: #f1f5f9;
  color: #94a3b8;
  border-color: #cbd5e1;
  /* Important: Clickable for highlighting */
  pointer-events: auto;
  cursor: help;
}

.dark-mode .sudoku-num.key-completed {
  background: #1e293b;
  color: #64748b;
  border-color: #334155;
}

/* LOCKED STATE (Must be last to override others) */
.sudoku-num.locked-num {
  background: var(--accent-color) !important;
  color: white !important;
  border-color: var(--accent-color) !important;
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.2);
  transform: scale(1.05);
  font-weight: 800;
  z-index: 10;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Mobile adjustments */
@media (max-width: 768px) {
  .sudoku-num {
    font-size: 1.1rem;
  }

  .btn-sudoku-action {
    padding: 8px 15px;
  }
}

/* Cell Selection */
.sudoku-mode .mini-cell:not(.has-number),
.sudoku-mode .mini-cell.user-filled {
  cursor: pointer;
}

.mini-cell.selected-cell {
  background: rgba(var(--accent-rgb), 0.2) !important;
  outline: 2px solid var(--accent-color);
  outline-offset: -2px;
  z-index: 5;
}

/* Default user-filled numbers are theme-colored (Memory/Jigsaw) */
/* Default user-filled numbers are theme-colored (Memory/Jigsaw) */
.mini-cell.user-filled {
  color: var(--text-main);
  font-weight: 900;
}

/* Orange user numbers ONLY during Sudoku modes */
.sudoku-mode .mini-cell.user-filled {
  color: var(--accent-color);
}

/* Orange notes ONLY during Sudoku modes - heightened specificity to beat theme defaults */
.sudoku-mode .mini-sudoku-grid .note-slot {
  color: var(--accent-color);
}

/* Return to theme color during win animation (Smoothly) */
.sudoku-mode .memory-board.board-complete .mini-cell.user-filled,
.sudoku-mode .memory-board.board-complete .note-slot {
  color: var(--text-main);
  transition: color 0.6s ease-out;
}

/* Matching Numbers Highlight */
.mini-cell.highlight-match {
  background: rgba(var(--accent-rgb), 0.15) !important;
  font-weight: 800;
}

/* ERROR FEEDBACK */
.mini-cell.error {
  color: #f44336 !important; /* Red for incorrect numbers */
}

/* SUCCESS FEEDBACK */
@keyframes sudokuPulseGreen {
  0% {
    box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.4);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 20px 10px rgba(76, 175, 80, 0.6);
    transform: scale(1.02);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(76, 175, 80, 0);
    transform: scale(1);
  }
}

.sudoku-mode .memory-board.board-complete {
  animation: sudokuPulseGreen 0.6s ease-out 1; /* Match memory: 1 pulse */
}

/* Notes Grid */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  width: 100%;
  height: 100%;
  padding: 2px;
  box-sizing: border-box;
}

.note-slot {
  font-size: 8px; /* Use container relative sizing if needed: 3cqw? */
  display: flex;
  justify-content: center;
  align-items: center;
  color: #666;
  line-height: 1;
}

.dark-mode .note-slot {
  color: #aaa;
}

/* Base transition removed to prevent entry delay */

.mini-cell {
  position: relative; /* For notes-grid positioning */
}