/* Sudoku Arena - Custom Board, Action Dock & 9-Level Segmented Numpad Styles */

.sudoku-board {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1 / 1;
  border: 2.5px solid #0F172A;
  border-radius: 14px;
  overflow: hidden;
  background-color: #ffffff;
  user-select: none;
  touch-action: manipulation;
  box-shadow: 0 10px 28px -6px rgba(15, 23, 42, 0.1), 0 2px 6px -1px rgba(15, 23, 42, 0.05);
}

.sudoku-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: clamp(18px, 4vw, 24px);
  border-right: 1px solid #e2e8f0;
  border-bottom: 1px solid #e2e8f0;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

/* 3x3 Block Thicker Dividers */
.sudoku-cell:nth-child(3n) {
  border-right: 2px solid #0F172A;
}
.sudoku-cell:nth-child(9n) {
  border-right: none;
}
.sudoku-cell:nth-child(n+19):nth-child(-n+27),
.sudoku-cell:nth-child(n+46):nth-child(-n+54) {
  border-bottom: 2px solid #0F172A;
}
.sudoku-cell:nth-child(n+73):nth-child(-n+81) {
  border-bottom: none;
}

/* Cell States */
.sudoku-cell.given {
  color: #0F172A;
  background-color: #f8fafc;
}

.sudoku-cell.user-filled {
  color: #FA520F;
  font-weight: 800;
}

.sudoku-cell.highlight-cross {
  background-color: #fff8e0 !important;
}

.sudoku-cell.highlight-same {
  background-color: #fed7aa !important;
  color: #9a3412 !important;
}

.sudoku-cell.selected {
  background-color: #ffedd5 !important;
  outline: 2px solid #fa520f;
  outline-offset: -2px;
  z-index: 2;
}

.sudoku-cell.conflict {
  background-color: #ffe4e6 !important;
  color: #e11d48 !important;
  animation: shake 0.25s ease-in-out;
}

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

/* Pencil Notes (Aday Sayılar) Grid inside empty cell */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  width: 100%;
  height: 100%;
  padding: 2px;
  pointer-events: none;
}

.notes-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(9px, 2vw, 11px);
  font-weight: 700;
  color: #334155;
  line-height: 1;
  border-radius: 4px;
  transition: all 0.15s ease;
}

/* Seçili rakamla eşleşen aday notlarının vurgulanması */
.sudoku-cell.highlight-note-cell {
  background-color: #fff7ed !important;
}

.notes-cell.note-match {
  background-color: #fa520f !important;
  color: #ffffff !important;
  font-weight: 900 !important;
  box-shadow: 0 1px 4px rgba(250, 82, 15, 0.4);
  transform: scale(1.08);
}

/* ==========================================================================
   1. METİNSİZ SEMBOL ARAÇ ÇUBUĞU (TAHTA İLE TUŞ TAKIMI ARASI)
   ========================================================================== */
.sudoku-action-dock {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.5rem;
  width: 100%;
  max-width: 480px;
}

.sudoku-tool-btn {
  position: relative;
  height: 3.125rem;
  border-radius: 0.875rem !important;
  background-color: #ffffff !important;
  border: 1.5px solid #e2e8f0 !important;
  color: #0F172A !important;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 6px -1px rgba(15, 23, 42, 0.05);
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
  touch-action: manipulation;
}

.sudoku-tool-btn svg {
  width: 1.35rem;
  height: 1.35rem;
  stroke-width: 2;
  transition: transform 0.16s ease, color 0.16s ease;
}

.sudoku-tool-btn:hover:not(:disabled) {
  border-color: #fa520f !important;
  background-color: #fff7ed !important;
  color: #fa520f !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px -2px rgba(250, 82, 15, 0.16);
}

.sudoku-tool-btn:active:not(:disabled) {
  transform: translateY(0) scale(0.97);
}

.sudoku-tool-btn.is-active {
  background: linear-gradient(135deg, #FA520F 0%, #EA580C 100%) !important;
  border-color: #CC3A05 !important;
  color: #FFFFFF !important;
  box-shadow: 0 6px 16px -3px rgba(250, 82, 15, 0.38) !important;
}

.sudoku-tool-btn.is-active svg {
  stroke: #FFFFFF !important;
}

.sudoku-tool-dot {
  position: absolute;
  top: 0.4rem;
  right: 0.45rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 9999px;
  background-color: #cbd5e1;
  transition: background-color 0.18s ease, box-shadow 0.18s ease;
}

.sudoku-tool-btn.is-active .sudoku-tool-dot {
  background-color: #ffffff;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.35);
}

.sudoku-hint-pill {
  position: absolute;
  top: 0.3rem;
  right: 0.35rem;
  min-width: 1.1rem;
  height: 1.1rem;
  padding: 0 0.25rem;
  border-radius: 9999px;
  background-color: #fff7ed;
  border: 1px solid #fed7aa;
  color: #fa520f;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 800;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   2. 9 SEVİYELİ ARKA PLANLI RAKAM TUŞ TAKIMI (1 - 9)
   ========================================================================== */
.sudoku-numpad-grid {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 0.375rem;
  width: 100%;
  max-width: 480px;
}

@media (min-width: 640px) {
  .sudoku-numpad-grid {
    gap: 0.5rem;
  }
}

.sudoku-num-btn {
  position: relative;
  height: 3.625rem;
  border-radius: 0.875rem !important;
  border: 1.5px solid #cbd5e1 !important;
  background-color: #f8fafc !important;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  cursor: pointer;
  padding: 0 !important;
  box-shadow: 0 2px 5px -1px rgba(15, 23, 42, 0.06);
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease, opacity 0.2s ease;
  user-select: none;
  touch-action: manipulation;
}

.sudoku-num-btn:hover:not(.is-depleted) {
  border-color: #fa520f !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 14px -3px rgba(250, 82, 15, 0.22);
}

.sudoku-num-btn:active:not(.is-depleted) {
  transform: translateY(0) scale(0.97);
}

.sudoku-num-btn.is-depleted {
  opacity: 0.32;
  border-color: #e2e8f0 !important;
  cursor: default;
}

/* 9 Seviyeli Arka Plan Izgarası (Alttan Üste 1..9 Kademe) */
.numpad-levels-bg {
  position: absolute;
  inset: 2px;
  border-radius: 0.7rem;
  overflow: hidden;
  display: grid;
  grid-template-rows: repeat(9, minmax(0, 1fr));
  gap: 1.5px;
  pointer-events: none;
  z-index: 1;
}

.numpad-level {
  width: 100%;
  height: 100%;
  background-color: rgba(226, 232, 240, 0.38);
  transition: background-color 0.22s ease;
}

.numpad-level.is-filled {
  background: linear-gradient(90deg, rgba(250, 82, 15, 0.24) 0%, rgba(245, 158, 11, 0.34) 100%);
}

.numpad-level.is-top-level {
  background: linear-gradient(90deg, rgba(250, 82, 15, 0.45) 0%, rgba(245, 158, 11, 0.55) 100%);
}

.numpad-digit {
  position: relative;
  z-index: 2;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 800;
  font-size: 1.25rem;
  color: #0F172A !important;
  line-height: 1;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.92);
  pointer-events: none;
}

/* ==========================================================================
   Monorepo Sudoku Layout & Utility Polyfills
   ========================================================================== */
.max-w-\[480px\] { max-width: 480px; }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.gap-1\.5 { gap: 0.375rem; }
.gap-2\.5 { gap: 0.625rem; }
.mb-1\.5 { margin-bottom: 0.375rem; }
.mb-2\.5 { margin-bottom: 0.625rem; }
.mt-0\.5 { margin-top: 0.125rem; }
.p-0\.5 { padding: 0.125rem; }
.p-2\.5 { padding: 0.625rem; }
.p-3\.5 { padding: 0.875rem; }
.px-1 { padding-left: 0.25rem; padding-right: 0.25rem; }
.px-2\.5 { padding-left: 0.625rem; padding-right: 0.625rem; }
.px-3\.5 { padding-left: 0.875rem; padding-right: 0.875rem; }
.py-0\.5 { padding-top: 0.125rem; padding-bottom: 0.125rem; }
.py-1\.5 { padding-top: 0.375rem; padding-bottom: 0.375rem; }
.py-2\.5 { padding-top: 0.625rem; padding-bottom: 0.625rem; }
.space-y-2\.5 > :not([hidden]) ~ :not([hidden]) { margin-top: 0.625rem; }

@media (min-width: 640px) {
  .sm\:flex-row { flex-direction: row; }
  .sm\:items-center { align-items: center; }
  .sm\:inline { display: inline; }
  .sm\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .sm\:grid-cols-9 { grid-template-columns: repeat(9, minmax(0, 1fr)); }
  .sm\:p-4 { padding: 1rem; }
  .sm\:p-5 { padding: 1.25rem; }
  .sm\:p-8 { padding: 2rem; }
  .sm\:px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
}

@media (min-width: 768px) {
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.backdrop-blur-md {
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

@keyframes scaleUp {
  0% { transform: scale(0.95); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
.animate-scaleUp { animation: scaleUp 0.2s ease-out; }