/* Sudoku — Super Mario World–inspired theme (bold SNES colors, light sky base) */

.sudoku-app {
  --sdk-cell: clamp(2rem, 9vw, 3.15rem);
  --sdk-sky: #5c94fc;
  --sdk-sky-light: #a8d0ff;
  --sdk-sky-pale: #e8f2ff;
  --sdk-ground: #00a800;
  --sdk-ground-dark: #007800;
  --sdk-coin: #fcb414;
  --sdk-coin-dark: #c87800;
  --sdk-block: #f8d878;
  --sdk-mario: #e52521;
  --sdk-mario-dark: #a81010;
  --sdk-dirt: #c84c0c;
  --sdk-outline: #181818;
  --sdk-given: #181818;
  --sdk-user: #1844c8;
  --sdk-note: #4868a8;
  --sdk-sel: #ffe050;
  --sdk-peer: #c8e0ff;
  --sdk-same: #70e070;
  --sdk-err: #ff6870;
  --sdk-panel: #fff8e8;
  max-width: 42rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.1rem 1rem 1.35rem;
  border-radius: 18px;
  border: 4px solid var(--sdk-outline);
  background:
    linear-gradient(180deg, var(--sdk-sky) 0%, var(--sdk-sky-light) 42%, #b8f0a0 78%, var(--sdk-ground) 100%);
  box-shadow:
    0 0 0 3px #fff,
    6px 8px 0 rgba(24, 24, 24, 0.22);
}

.sudoku-app__header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding: 0.55rem 0.75rem;
  border: 3px solid var(--sdk-outline);
  border-radius: 12px;
  background: var(--sdk-panel);
  box-shadow: inset 0 -3px 0 rgba(200, 76, 12, 0.18);
}

.sudoku-timer {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  margin-left: auto;
  padding: 0.15rem 0.55rem 0.2rem;
  border: 3px solid var(--sdk-outline);
  border-radius: 8px;
  background: #181818;
  min-width: 4.6rem;
}

.sudoku-timer__label {
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sdk-coin);
}

.sudoku-timer__value {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.1;
  color: #fff;
  font-variant-numeric: tabular-nums;
}

.sudoku-app__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--sdk-mario);
  text-shadow:
    2px 0 0 #fff,
    -2px 0 0 #fff,
    0 2px 0 #fff,
    0 -2px 0 #fff,
    3px 3px 0 var(--sdk-outline);
  letter-spacing: 0.02em;
}

.sudoku-app__meta {
  margin: 0;
  color: var(--sdk-dirt);
  font-size: 0.95rem;
  font-weight: 800;
}

.sudoku-app__board-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.sudoku-board {
  display: grid;
  grid-template-columns: repeat(9, var(--sdk-cell));
  grid-template-rows: repeat(9, var(--sdk-cell));
  gap: 0;
  padding: 5px;
  background: var(--sdk-outline);
  border-radius: 10px;
  border: 3px solid var(--sdk-outline);
  box-shadow:
    0 0 0 3px var(--sdk-coin),
    4px 5px 0 rgba(24, 24, 24, 0.28);
  user-select: none;
  -webkit-user-select: none;
}

.sudoku-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--sdk-cell);
  height: var(--sdk-cell);
  margin: 0;
  padding: 0;
  border: none;
  border-right: 1px solid #90b8e8;
  border-bottom: 1px solid #90b8e8;
  background: #fffef8;
  font-family: var(--font-display);
  font-size: calc(var(--sdk-cell) * 0.52);
  font-weight: 700;
  color: var(--sdk-user);
  cursor: pointer;
  line-height: 1;
}

/* Soft checkerboard — light, not pastel wash */
.sudoku-cell:nth-child(odd) {
  background: #fffef8;
}
.sudoku-cell:nth-child(even) {
  background: #f0f7ff;
}

.sudoku-cell:nth-child(9n) {
  border-right: none;
}
.sudoku-cell:nth-child(n+73) {
  border-bottom: none;
}
.sudoku-cell:nth-child(3n):not(:nth-child(9n)) {
  border-right: 3px solid var(--sdk-outline);
}
.sudoku-cell:nth-child(n+19):nth-child(-n+27),
.sudoku-cell:nth-child(n+46):nth-child(-n+54) {
  border-bottom: 3px solid var(--sdk-outline);
}

.sudoku-cell.is-given {
  color: var(--sdk-given);
  font-weight: 700;
  text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.7);
}

.sudoku-cell.is-selected {
  background: var(--sdk-sel) !important;
  box-shadow: inset 0 0 0 3px var(--sdk-coin-dark);
  z-index: 1;
}

.sudoku-cell.is-peer {
  background: var(--sdk-peer) !important;
}

.sudoku-cell.is-same {
  background: var(--sdk-same) !important;
  color: #084808;
}

.sudoku-cell.is-selected.is-same {
  background: var(--sdk-sel) !important;
}

.sudoku-cell.is-error {
  background: var(--sdk-err) !important;
  color: #700008;
  box-shadow: inset 0 0 0 2px var(--sdk-mario-dark);
}

.sudoku-cell.is-hint {
  animation: sudoku-hint-pulse 0.9s ease;
}

@keyframes sudoku-hint-pulse {
  0%, 100% { box-shadow: inset 0 0 0 0 transparent; }
  40% { box-shadow: inset 0 0 0 4px var(--sdk-ground); }
}

.sudoku-cell__notes {
  position: absolute;
  inset: 2px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  pointer-events: none;
  font-family: var(--font-body);
  font-size: calc(var(--sdk-cell) * 0.22);
  font-weight: 800;
  color: var(--sdk-note);
  line-height: 1;
}

.sudoku-cell__notes span {
  display: flex;
  align-items: center;
  justify-content: center;
}

.sudoku-pad {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.45rem;
  width: min(100%, 22rem);
}

.sudoku-pad button {
  font: inherit;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  padding: 0.55rem 0.35rem;
  border: 3px solid var(--sdk-outline);
  border-radius: 10px;
  background:
    linear-gradient(180deg, #ffe898 0%, var(--sdk-block) 45%, var(--sdk-coin) 100%);
  color: var(--sdk-outline);
  cursor: pointer;
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.55),
    inset 0 -3px 0 rgba(200, 120, 0, 0.45),
    2px 3px 0 rgba(24, 24, 24, 0.2);
  transition: transform 0.1s ease, filter 0.12s ease;
}

.sudoku-pad button:hover {
  filter: brightness(1.06);
}

.sudoku-pad button:active {
  transform: translateY(2px);
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.35),
    inset 0 -1px 0 rgba(200, 120, 0, 0.45);
}

.sudoku-pad button:last-child {
  background:
    linear-gradient(180deg, #ff9088 0%, #f05048 50%, var(--sdk-mario) 100%);
  color: #fff;
  text-shadow: 1px 1px 0 var(--sdk-outline);
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.35),
    inset 0 -3px 0 rgba(120, 16, 16, 0.45),
    2px 3px 0 rgba(24, 24, 24, 0.2);
}

.sudoku-pad button.is-active-tool {
  background: var(--sdk-ground);
  color: #fff;
}

.sudoku-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: center;
}

.sudoku-tools .btn {
  border: 3px solid var(--sdk-outline) !important;
  border-radius: 10px !important;
  font-weight: 800 !important;
  background: var(--sdk-panel) !important;
  color: var(--sdk-outline) !important;
  box-shadow: 2px 3px 0 rgba(24, 24, 24, 0.18);
}

.sudoku-tools .btn:hover {
  background: #fff !important;
  filter: brightness(1.02);
}

.sudoku-tools .btn.is-on {
  background: var(--sdk-ground) !important;
  color: #fff !important;
  border-color: var(--sdk-outline) !important;
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.25);
}

.sudoku-status {
  min-height: 1.4em;
  text-align: center;
  font-weight: 800;
  color: #084808;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
}

.sudoku-status.is-error {
  color: var(--sdk-mario-dark);
}

.sudoku-status.is-win {
  color: var(--sdk-coin-dark);
  font-size: 1.15rem;
  text-shadow:
    1px 1px 0 #fff,
    2px 2px 0 var(--sdk-outline);
}

.sudoku-result {
  padding: 0.85rem 1rem;
  border: 3px solid var(--sdk-outline);
  border-radius: 12px;
  background: var(--sdk-panel);
  box-shadow: 3px 4px 0 rgba(24, 24, 24, 0.16);
}

.sudoku-result__title {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--sdk-mario);
}

.sudoku-result__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(6.5rem, 1fr));
  gap: 0.55rem;
  margin: 0;
}

.sudoku-result__stats div {
  padding: 0.4rem 0.5rem;
  border-radius: 8px;
  background: #fff;
  border: 2px solid var(--sdk-outline);
}

.sudoku-result__stats dt {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--sdk-dirt);
}

.sudoku-result__stats dd {
  margin: 0.15rem 0 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--sdk-outline);
}

.sudoku-result__stats dd span {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--sdk-dirt);
}

.sudoku-result__summary,
.sudoku-result__link {
  margin: 0.7rem 0 0;
  font-size: 0.92rem;
  font-weight: 700;
}

.sudoku-result__actions {
  margin: 1rem 0 0;
}

.sudoku-result__link a {
  color: var(--sdk-user);
}

.sudoku-app__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  justify-content: center;
}

.sudoku-app__actions .btn-primary {
  border: 3px solid var(--sdk-outline) !important;
  background: var(--sdk-mario) !important;
  color: #fff !important;
  box-shadow: 2px 3px 0 rgba(24, 24, 24, 0.2);
}

.sudoku-app__actions .btn-secondary {
  border: 3px solid var(--sdk-outline) !important;
  background: var(--sdk-block) !important;
  color: var(--sdk-outline) !important;
  box-shadow: 2px 3px 0 rgba(24, 24, 24, 0.18);
}

.sudoku-print-only {
  display: none;
}

@media (max-width: 640px) {
  .sudoku-app__header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.45rem 0.65rem;
  }

  .sudoku-app__title {
    grid-column: 1;
    grid-row: 1;
    margin: 0;
  }

  .sudoku-timer {
    grid-column: 2;
    grid-row: 1;
    margin-left: 0;
  }

  .sudoku-app__header .puzzle-mode-tabs,
  .sudoku-app__header .sudoku-app__meta {
    grid-column: 1 / -1;
    grid-row: 2;
    margin-top: 0;
    justify-self: center;
  }
}

@media print {
  body * {
    visibility: hidden !important;
  }
  .sudoku-print-sheet,
  .sudoku-print-sheet * {
    visibility: visible !important;
  }
  .sudoku-print-sheet {
    display: block !important;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    padding: 1.5rem;
    background: #fff;
    color: #000;
  }
  .sudoku-print-sheet h1 {
    font-family: Georgia, serif;
    font-size: 1.5rem;
    margin: 0 0 0.35rem;
  }
  .sudoku-print-sheet p {
    margin: 0 0 1rem;
    font-size: 0.95rem;
  }
  .sudoku-print-grid {
    display: grid;
    grid-template-columns: repeat(9, 2.4rem);
    grid-template-rows: repeat(9, 2.4rem);
    border: 2px solid #000;
    width: max-content;
  }
  .sudoku-print-grid span {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 0.5px solid #999;
    font-family: Georgia, serif;
    font-size: 1.1rem;
    font-weight: 700;
  }
  .sudoku-print-grid span:nth-child(3n) {
    border-right: 2px solid #000;
  }
  .sudoku-print-grid span:nth-child(n+19):nth-child(-n+27),
  .sudoku-print-grid span:nth-child(n+46):nth-child(-n+54) {
    border-bottom: 2px solid #000;
  }
}

.play-game-shell--sudoku {
  width: 100%;
  max-width: 48rem;
  margin: 0 auto;
  padding: 1rem 0.75rem 2rem;
}

.play-game-shell--lexigo {
  width: 100%;
  max-width: 48rem;
  margin: 0 auto;
  padding: 1rem 0.75rem 2rem;
}