/* =============================================
   sudoku.css — Sudoku Game Styles
   Mini Games Hub — Premium Gaming UI
   ============================================= */

/* ---- Accent ---- */
.sudoku-accent {
  border-color: rgba(0, 212, 255, 0.4) !important;
  background: rgba(0, 212, 255, 0.07) !important;
}

.sudoku-accent .stat-card-value {
  color: var(--clr-neon-blue) !important;
  text-shadow: 0 0 16px rgba(0, 212, 255, 0.5);
}

/* ---- Game Area ---- */
.sudoku-game-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  width: 100%;
  max-width: 500px;
}

/* ---- Board ---- */
.sudoku-board-wrap {
  width: 100%;
  max-width: 420px;
  padding: var(--space-3);
  background: rgba(13, 13, 26, 0.9);
  border: 1.5px solid rgba(0, 212, 255, 0.2);
  border-radius: var(--radius-xl);
  box-shadow: 0 0 50px rgba(0, 212, 255, 0.08), var(--shadow-lg);
}

.sudoku-board {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 0;
  width: 100%;
  aspect-ratio: 1;
}

.sudoku-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: clamp(0.85rem, 3vw, 1.3rem);
  font-weight: 700;
  color: var(--clr-text-primary);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  cursor: pointer;
  transition: all 100ms ease;
  position: relative;
}

/* 3x3 box borders */
.sudoku-cell.border-right { border-right: 2px solid rgba(0, 212, 255, 0.25); }
.sudoku-cell.border-bottom { border-bottom: 2px solid rgba(0, 212, 255, 0.25); }
.sudoku-cell.border-left { border-left: 2px solid rgba(0, 212, 255, 0.25); }
.sudoku-cell.border-top { border-top: 2px solid rgba(0, 212, 255, 0.25); }

.sudoku-cell.given {
  color: rgba(255, 255, 255, 0.6);
  cursor: default;
}

.sudoku-cell.user {
  color: var(--clr-neon-blue);
  text-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
}

.sudoku-cell.selected {
  background: rgba(0, 212, 255, 0.12) !important;
  border-color: rgba(0, 212, 255, 0.5) !important;
  box-shadow: inset 0 0 12px rgba(0, 212, 255, 0.15);
}

.sudoku-cell.highlighted {
  background: rgba(0, 212, 255, 0.05);
}

.sudoku-cell.error {
  color: var(--clr-neon-red) !important;
  text-shadow: 0 0 8px rgba(255, 71, 87, 0.5) !important;
  animation: cellShake 0.3s ease;
}

.sudoku-cell.correct-flash {
  animation: correctFlash 0.4s ease;
}

/* Pencil marks */
.sudoku-cell .pencil-marks {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  position: absolute;
  inset: 2px;
  font-size: clamp(0.4rem, 1.2vw, 0.55rem);
  font-weight: 600;
  color: rgba(167, 139, 250, 0.6);
  pointer-events: none;
}

.sudoku-cell .pencil-marks span {
  display: flex;
  align-items: center;
  justify-content: center;
}

@keyframes cellShake {
  0%, 100% { transform: translateX(0); }
  25%      { transform: translateX(-3px); }
  75%      { transform: translateX(3px); }
}

@keyframes correctFlash {
  0%   { background: rgba(0, 245, 160, 0.3); }
  100% { background: rgba(255, 255, 255, 0.03); }
}

/* ---- Controls ---- */
.sudoku-controls {
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.sudoku-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
}

.sudoku-act-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-secondary);
  font-size: var(--text-xs);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  min-width: 60px;
}

.sudoku-act-btn i {
  font-size: 1rem;
}

.sudoku-act-btn:hover {
  color: var(--clr-neon-blue);
  border-color: rgba(0, 212, 255, 0.3);
  background: rgba(0, 212, 255, 0.06);
}

.sudoku-act-btn.active {
  color: var(--clr-neon-purple);
  border-color: rgba(167, 139, 250, 0.4);
  background: rgba(167, 139, 250, 0.1);
  box-shadow: 0 0 15px rgba(167, 139, 250, 0.15);
}

/* ---- Numpad ---- */
.sudoku-numpad {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: var(--space-2);
}

.numpad-btn {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: clamp(0.9rem, 2.5vw, 1.2rem);
  font-weight: 800;
  color: var(--clr-text-primary);
  background: rgba(255, 255, 255, 0.04);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.numpad-btn:hover {
  color: var(--clr-neon-blue);
  border-color: rgba(0, 212, 255, 0.4);
  background: rgba(0, 212, 255, 0.08);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.2);
  transform: scale(1.05);
}

.numpad-btn:active {
  transform: scale(0.95);
}

.numpad-btn.completed {
  opacity: 0.25;
  pointer-events: none;
}

/* ---- Victory Overlay ---- */
.sudoku-overlay {
  position: fixed;
  inset: 0;
  background: rgba(13, 13, 26, 0.92);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  transition: opacity var(--transition-base);
}

.sudoku-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.sudoku-overlay-card {
  background: var(--clr-bg-card);
  border: 1.5px solid rgba(0, 212, 255, 0.3);
  border-radius: var(--radius-2xl);
  padding: var(--space-10) var(--space-8);
  text-align: center;
  max-width: 380px;
  width: 90%;
  box-shadow: 0 0 60px rgba(0, 212, 255, 0.15), var(--shadow-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
  .sudoku-actions {
    gap: var(--space-2);
  }

  .sudoku-act-btn {
    min-width: 50px;
    padding: var(--space-2) var(--space-3);
  }

  .numpad-btn {
    font-size: 0.9rem;
  }
}