:root {
  --paper: #fff8e8;
  --ink: #26332b;
  --muted: #6c705b;
  --leaf: #4c9b72;
  --leaf-dark: #2f6f55;
  --sun: #f2b84b;
  --berry: #cf5c56;
  --sky: #bcdde0;
  --soil: #8a6145;
  --line: #d8caa4;
  --tile: #fffdf4;
  --tile-fixed: #e7f0d1;
  --focus: #255d8a;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    linear-gradient(180deg, var(--sky) 0 46%, #f6e7b9 46% 100%);
  color: var(--ink);
  font-family: Avenir Next, Trebuchet MS, Verdana, sans-serif;
}

button,
input {
  font: inherit;
}

.app {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 340px);
  gap: clamp(18px, 3vw, 34px);
  padding: clamp(16px, 4vw, 42px);
  max-width: 1180px;
  margin: 0 auto;
}

.playfield {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  z-index: 2;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--leaf-dark);
  font-size: 0.9rem;
  font-weight: 800;
}

h1 {
  margin: 0;
  font-size: clamp(2.1rem, 4vw, 4.4rem);
  line-height: 0.9;
  letter-spacing: 0;
}

.stars {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  color: #7b512c;
  font-weight: 900;
}

.stars span {
  color: var(--sun);
  font-size: 1.35rem;
  letter-spacing: 0;
  text-shadow: 0 1px 0 var(--soil);
}

.stars strong {
  min-width: 32px;
  padding: 3px 8px;
  border: 2px solid color-mix(in srgb, var(--soil), transparent 45%);
  background: #fffdf4;
  text-align: center;
}

.score-strip {
  display: grid;
  grid-template-columns: repeat(3, 76px);
  border: 2px solid color-mix(in srgb, var(--soil), transparent 52%);
  background: color-mix(in srgb, var(--paper), transparent 4%);
}

.score-strip div {
  padding: 10px 8px;
  border-left: 1px solid var(--line);
  text-align: center;
}

.score-strip div:first-child {
  border-left: 0;
}

.score-strip span {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
}

.score-strip strong {
  display: block;
  font-size: 1.4rem;
  line-height: 1.1;
}

.garden-wrap {
  position: relative;
  flex: 1;
  display: grid;
  place-items: center;
  width: 100%;
  overflow: hidden;
  min-height: min(58vh, 620px);
  padding: 18px 0;
}

.garden-art {
  position: absolute;
  inset: auto 0 0;
  width: min(100%, 900px);
  margin: auto;
  opacity: 0.95;
}

.board-shell {
  position: relative;
  display: block;
  width: max-content;
  max-width: 100%;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
  z-index: 1;
}

.board {
  display: grid;
  gap: 8px;
  align-items: center;
  justify-items: center;
  max-width: 100%;
}

.cell {
  width: 52px;
  aspect-ratio: 1;
  min-height: 0;
  display: grid;
  place-items: center;
  border: 2px solid var(--soil);
  background: var(--tile);
  font-size: clamp(1.45rem, 4vw, 2.25rem);
  font-weight: 900;
}

.cell.fixed {
  background: var(--tile-fixed);
  color: var(--leaf-dark);
}

.cell.empty {
  background: #fffaf0;
  cursor: pointer;
}

.cell.selected {
  outline: 5px solid color-mix(in srgb, var(--focus), transparent 35%);
  outline-offset: 2px;
}

.cell.wrong {
  background: #f7d5cf;
  border-color: var(--berry);
}

.cell.correct {
  background: #d9efd7;
}

.cell.user-filled {
  color: #234a3a;
}

.candidates {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(var(--candidate-cols), 1fr);
  align-items: center;
  justify-items: center;
  padding: 4px;
  gap: 1px;
  color: color-mix(in srgb, var(--leaf-dark), transparent 10%);
  font-size: clamp(0.42rem, 1.2vw, 0.62rem);
  font-weight: 850;
  line-height: 1;
}

.candidates span {
  min-width: 0;
}

.panel {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 18px;
  background: var(--paper);
  border-left: 5px solid var(--leaf);
}

.mode-group {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.difficulty-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

button {
  min-height: 44px;
  border: 2px solid var(--soil);
  background: #fffdf4;
  color: var(--ink);
  cursor: pointer;
  font-weight: 850;
}

button:hover {
  transform: translateY(-1px);
}

button:focus-visible,
.cell:focus-visible {
  outline: 4px solid var(--focus);
  outline-offset: 2px;
}

.mode.active,
.difficulty.active,
.primary {
  background: var(--leaf);
  color: #fffdf4;
}

.message {
  min-height: 74px;
  display: flex;
  align-items: center;
  padding: 14px;
  background: #f8eecf;
  border: 2px solid var(--line);
  color: #4d432b;
  font-weight: 800;
  line-height: 1.35;
}

.toggle-group {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.toggle-group label {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 2px solid var(--soil);
  background: #fffdf4;
  font-weight: 850;
  cursor: pointer;
}

.toggle-group input {
  width: 18px;
  height: 18px;
  accent-color: var(--leaf);
}

.pad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.pad[data-max="12"] {
  grid-template-columns: repeat(4, 1fr);
}

.pad[data-max="5"],
.pad[data-max="6"],
.pad[data-max="7"],
.pad[data-max="8"],
.pad[data-max="9"] {
  grid-template-columns: repeat(5, 1fr);
}

.pad button {
  aspect-ratio: 1.15;
  min-height: 0;
  font-size: 1.6rem;
  background: #ffffff;
}

.actions {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 8px;
}

.sudoku-board {
  --board-gap: clamp(3px, 0.8vw, 8px);
  width: var(--board-max);
  max-width: min(100%, calc(100vw - 460px));
  padding: 10px;
  gap: var(--board-gap);
  background: color-mix(in srgb, var(--paper), transparent 8%);
  border: 3px solid var(--soil);
  box-shadow: 10px 12px 0 color-mix(in srgb, var(--soil), transparent 45%);
}

.sudoku-cell {
  width: 100%;
  border-radius: 8px;
  font-size: clamp(1rem, 2.4vw, 1.65rem);
}

.sudoku-cell.box-right {
  border-right-width: 5px;
}

.sudoku-cell.box-bottom {
  border-bottom-width: 5px;
}

.parent-note {
  margin-top: auto;
  padding-top: 16px;
  border-top: 2px solid var(--line);
  color: var(--muted);
  line-height: 1.55;
}

.parent-note strong {
  color: var(--ink);
}

.parent-note p {
  margin: 8px 0 0;
}

.records {
  border-top: 2px solid var(--line);
  padding-top: 14px;
}

.record-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.record-actions {
  display: flex;
  gap: 8px;
}

.record-actions button {
  min-height: 32px;
  padding: 0 10px;
  font-size: 0.85rem;
}

.record-title {
  min-height: 32px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  text-align: left;
}

.record-title:hover {
  transform: none;
}

.record-best {
  margin-top: 10px;
  color: var(--leaf-dark);
  font-weight: 850;
}

.records ol {
  margin: 8px 0 0;
  padding-left: 22px;
  color: var(--muted);
  line-height: 1.55;
}

.hidden {
  display: none !important;
}

.celebration {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 24px;
  background: color-mix(in srgb, var(--ink), transparent 42%);
}

.celebration-card {
  width: min(360px, 100%);
  padding: 26px;
  border: 4px solid var(--soil);
  background: var(--paper);
  box-shadow: 10px 12px 0 color-mix(in srgb, var(--soil), transparent 35%);
  text-align: center;
}

.celebration-mark {
  width: 74px;
  height: 74px;
  display: grid;
  place-items: center;
  margin: 0 auto 10px;
  border: 3px solid var(--soil);
  border-radius: 50%;
  background: var(--sun);
  color: #fffdf4;
  font-size: 2.4rem;
  font-weight: 900;
}

.celebration-card h2 {
  margin: 0;
  font-size: 2rem;
}

.celebration-card p {
  margin: 10px 0 18px;
  color: var(--muted);
  font-weight: 800;
  line-height: 1.45;
}

.celebration-card button {
  width: 100%;
  background: var(--leaf);
  color: #fffdf4;
}

@media (max-width: 860px) {
  .app {
    grid-template-columns: 1fr;
    max-width: 720px;
    gap: 14px;
  }

  .topbar {
    flex-direction: column;
    gap: 12px;
  }

  .garden-wrap {
    min-height: 0;
  }

  .panel {
    border-left: 0;
    border-top: 5px solid var(--leaf);
    gap: 12px;
  }
}

@media (max-width: 520px) {
  .garden-wrap {
    min-height: 0;
    padding: 10px 0;
    justify-items: start;
  }

  .app {
    padding: 12px;
    width: 100%;
    max-width: 390px;
    margin: 0;
  }

  .score-strip {
    width: 100%;
    grid-template-columns: repeat(3, 1fr);
  }

  .board-shell {
    padding: 0;
  }

  .sudoku-board {
    max-width: min(100%, calc(100vw - 24px));
    padding: 7px;
    box-shadow: 6px 8px 0 color-mix(in srgb, var(--soil), transparent 45%);
  }

  .mode-group {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .difficulty-group {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .mode,
  .difficulty {
    font-size: 0.86rem;
  }

  .panel {
    padding: 12px;
  }

  .toggle-group,
  .actions {
    grid-template-columns: 1fr;
  }

  .pad {
    gap: 6px;
  }

  .record-head {
    align-items: flex-start;
  }

  .record-actions {
    flex-shrink: 0;
  }

  .celebration-card {
    padding: 22px;
    box-shadow: 6px 8px 0 color-mix(in srgb, var(--soil), transparent 35%);
  }
}