/* =========================================================
   Sudoku (lifesuncertain.com/games/sudoku.html)
   Everything is scoped under .sdk and uses --sdk-* tokens so
   it can't collide with styles.css. Light/dark follows the
   site's html[data-theme]. Layout uses container queries, so
   it responds to the space it's given, not the window size.
   ========================================================= */

/* ---------- Tokens: light ---------- */
.sdk {
  --sdk-ink: #2D3448;
  --sdk-ink-muted: #47506B;
  --sdk-panel: #F3F4F6;
  --sdk-line: #2D3448;
  --sdk-line-thin: #A9B1C6;

  --sdk-cell-bg: #FFFFFF;
  --sdk-cell-peer: #E4E8F1;
  --sdk-cell-same: #C5CCDD;
  --sdk-cell-sel: #FFD800;
  --sdk-cell-sel-ink: #2D3448;
  --sdk-given-ink: #2D3448;
  --sdk-user-ink: #1D4E9E;
  --sdk-wrong-ink: #B3001B;
  --sdk-wrong-ink-sel: #A00018;
  --sdk-note-ink: #47506B;

  --sdk-btn-bg: #D7DBE5;
  --sdk-btn-ink: #2D3448;
  --sdk-btn-hover: #C5CCDD;
  --sdk-primary-bg: #2D3448;
  --sdk-primary-ink: #FFFFFF;
  --sdk-pressed-bg: #2D3448;
  --sdk-pressed-ink: #FFD800;
  --sdk-accent: #FFD800;
  --sdk-input-border: #7C86A1;

  --sdk-focus: #2D3448;
  --sdk-focus-cell: #2D3448;
  --sdk-radius: 10px;
}

/* ---------- Tokens: dark (site toggle) ---------- */
:root[data-theme="dark"] .sdk {
  --sdk-ink: #EEEEEE;
  --sdk-ink-muted: #C4CAD8;
  --sdk-panel: #2A3040;
  --sdk-line: #D7DBE5;
  --sdk-line-thin: #5B6585;

  --sdk-cell-bg: #2D3448;
  --sdk-cell-peer: #3B4462;
  --sdk-cell-same: #4A5372;
  --sdk-given-ink: #FFFFFF;
  --sdk-user-ink: #FFE45C;
  --sdk-wrong-ink: #FFC2C2;
  --sdk-note-ink: #D7DBE5;

  --sdk-btn-bg: #3B4462;
  --sdk-btn-ink: #FFFFFF;
  --sdk-btn-hover: #4A5372;
  --sdk-primary-bg: #FFD800;
  --sdk-primary-ink: #2D3448;
  --sdk-pressed-bg: #FFD800;
  --sdk-pressed-ink: #2D3448;
  --sdk-input-border: #7C86A1;

  --sdk-focus: #FFD600;
}

/* ---------- Base ---------- */
.sdk {
  container: sdk / inline-size;
  color: var(--sdk-ink);
}
.sdk *, .sdk *::before, .sdk *::after { box-sizing: border-box; }
.sdk :focus-visible { outline: 3px solid var(--sdk-focus); outline-offset: 3px; }

.sdk-vh {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.sdk-intro { margin: 0 0 20px; }

/* =========================================================
   Layout
   Narrow (phones, tablets, zoomed in): one column, in this order:
   stats, board, tools, number pad, then status, Move box, new game.
   Board + tools + pad are sized to fit one phone screen together.
   ========================================================= */
.sdk-game {
  --cell: clamp(26px, calc((100cqi - 26px) / 9), 60px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: calc(var(--cell) * 9 + 26px);
  margin: 0 auto;
}
.sdk-col { display: contents; }

.sdk-statbar     { order: 1; }
.sdk-board-frame { order: 2; }
.sdk-tools       { order: 3; }
.sdk-pad         { order: 4; }
.sdk-status      { order: 5; }
.sdk-command     { order: 6; }
.sdk-newgame     { order: 7; }
.sdk-keys        { order: 8; }

/* Wide: board on the left, controls on the right. */
@container sdk (min-width: 880px) {
  .sdk-game {
    --cell: 60px;
    display: grid;
    grid-template-columns: auto minmax(300px, 380px);
    justify-content: center;
    align-items: start;
    gap: 28px;
    max-width: none;
  }
  .sdk-col { display: flex; flex-direction: column; gap: 14px; }
}

/* ---------- Stat bar ---------- */
.sdk-statbar {
  display: flex;
  flex-wrap: wrap;            /* very narrow / zoomed: Pause drops to its own line */
  align-items: center;
  justify-content: space-between;
  gap: 4px 10px;
}
.sdk-stat {
  margin: 0;
  display: flex; flex-direction: column;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.sdk-stat-label { color: var(--sdk-ink-muted); font-size: 13px; }
.sdk-stat-value { font-weight: 600; font-size: 18px; }

@container sdk (min-width: 880px) {
  .sdk-statbar { justify-content: flex-start; gap: 6px 22px; }
  .sdk-stat { flex-direction: row; align-items: baseline; gap: 6px; }
  .sdk-stat-label { font-size: 16px; }
  .sdk-stat-value { font-size: 20px; }
  .sdk-pause { margin-left: auto; }
}

.sdk.no-timer #sdk-time-wrap { display: none; }
.sdk.no-mistakes #sdk-mistakes-wrap { display: none; }

/* ---------- Board ---------- */
.sdk-board-frame {
  position: relative;
  display: grid;
  grid-template-columns: 20px auto;
  grid-template-rows: 20px auto;
  width: max-content;
}
.sdk-colheads {
  grid-column: 2; grid-row: 1;
  display: grid; grid-template-columns: repeat(9, var(--cell));
  padding-left: 3px;
}
.sdk-rowheads {
  grid-column: 1; grid-row: 2;
  display: grid; grid-template-rows: repeat(9, var(--cell));
  padding-top: 3px;
}
.sdk-colheads span, .sdk-rowheads span {
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: var(--sdk-ink-muted); line-height: 1;
}

/* Undo the site's general table/td rules for the board. */
.sdk .sdk-board {
  grid-column: 2; grid-row: 2;
  width: auto;
  margin: 0;
  border-collapse: collapse;
  border: 3px solid var(--sdk-line);
  background: var(--sdk-cell-bg);
  table-layout: fixed;
}
.sdk .sdk-board td {
  padding: 0;
  width: var(--cell); height: var(--cell);
  border: 1px solid var(--sdk-line-thin);
  vertical-align: middle;
}
.sdk .sdk-board td.bx-l { border-left: 3px solid var(--sdk-line); }
.sdk .sdk-board td.bx-t { border-top: 3px solid var(--sdk-line); }

.sdk-cell {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  width: 100%; height: 100%;
  min-width: 0;
  margin: 0; padding: 0;
  border: 0; border-radius: 0;
  background: var(--sdk-cell-bg);
  color: var(--sdk-user-ink);
  font: inherit;
  font-size: calc(var(--cell) * .56);
  line-height: 1;
  cursor: pointer;
  font-variant-numeric: tabular-nums;
  -webkit-tap-highlight-color: transparent;
}
.sdk-cell.is-peer { background: var(--sdk-cell-peer); }
.sdk-cell.is-same { background: var(--sdk-cell-same); }
.sdk-cell.is-given { color: var(--sdk-given-ink); font-weight: 700; }
.sdk-cell.is-user { font-weight: 500; }
.sdk-cell.is-wrong { color: var(--sdk-wrong-ink); }
.sdk-cell.is-wrong .sdk-val {
  text-decoration: underline wavy;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}
.sdk-cell.is-selected { background: var(--sdk-cell-sel); color: var(--sdk-cell-sel-ink); }
.sdk-cell.is-selected.is-wrong { color: var(--sdk-wrong-ink-sel); }
.sdk-cell.is-selected .sdk-notes { color: var(--sdk-cell-sel-ink); }
.sdk-cell:focus { outline: none; }
.sdk-cell:focus-visible,
.sdk-cell.is-selected:focus {
  outline: 3px solid var(--sdk-focus-cell);
  outline-offset: -5px;
}

.sdk-notes {
  position: absolute; inset: 2px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  color: var(--sdk-note-ink);
  font-size: calc(var(--cell) * .25);
  font-weight: 600;
  line-height: 1;
}
.sdk-notes span { display: flex; align-items: center; justify-content: center; }

.sdk-cname {
  display: none;
  position: absolute; top: 2px; left: 3px;
  font-size: 10px; font-weight: 700; line-height: 1;
  color: var(--sdk-ink-muted);
}
.sdk-cell.is-selected .sdk-cname { color: var(--sdk-cell-sel-ink); }
.sdk.show-cellnames .sdk-cname { display: block; }
.sdk.show-cellnames .sdk-notes { top: 11px; }

.sdk-paused-cover {
  grid-column: 2; grid-row: 2;
  display: flex; align-items: center; justify-content: center;
  background: var(--sdk-panel);
  border: 3px solid var(--sdk-line);
  z-index: 2;
}
.sdk-paused-cover[hidden] { display: none; }
.sdk-paused-cover p { margin: 0; font-size: 1.6em; font-weight: 800; }

.sdk-status {
  min-height: 3.2em;
  margin: 0;
  padding: 10px 14px;
  background: var(--sdk-panel);
  border-left: 6px solid var(--sdk-accent);
  border-radius: 6px;
  font-size: 18px;
  font-weight: 500;
  line-height: 1.45;
}
.sdk-status:empty { display: none; }

.sdk-keys { font-size: 15px; color: var(--sdk-ink-muted); margin: 0; line-height: 1.5; }

/* ---------- Buttons ---------- */
.sdk-btn, .sdk-tool, .sdk-num {
  font: inherit;
  color: var(--sdk-btn-ink);
  background: var(--sdk-btn-bg);
  border: 2px solid transparent;
  border-radius: var(--sdk-radius);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
@media (hover: hover) {   /* touch screens keep :hover after a tap; skip it there */
  .sdk-btn:hover, .sdk-tool:hover, .sdk-num:hover { background: var(--sdk-btn-hover); }
}
.sdk-btn {
  min-height: 48px;
  padding: 8px 20px;
  font-weight: 600;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.sdk-btn-small { min-height: 44px; padding: 6px 12px; font-size: 16px; gap: 6px; }
.sdk-btn-primary { background: var(--sdk-primary-bg); color: var(--sdk-primary-ink); }
@media (hover: hover) {
  .sdk-btn-primary:hover { background: var(--sdk-primary-bg); filter: brightness(1.15); }
}

.sdk-icon {
  width: 22px; height: 22px; flex: none;
  fill: none; stroke: currentColor; stroke-width: 2.2;
  stroke-linecap: round; stroke-linejoin: round;
}

/* Tools: one row of four */
.sdk-tools {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.sdk-tool {
  position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px;
  min-height: 54px;
  padding: 6px 4px;
  font-size: 14px; font-weight: 600; line-height: 1.2;
}
.sdk-tool[aria-pressed="true"] { background: var(--sdk-pressed-bg); color: var(--sdk-pressed-ink); }
.sdk-badge {
  position: absolute; top: 3px; right: 3px;
  font-size: 10px; line-height: 1; padding: 2px 4px;
  border-radius: 999px;
  background: var(--sdk-cell-bg); color: var(--sdk-ink);
  border: 1px solid currentColor;
}

/* Number pad: two rows (1–5, 6–9) on phones, so each button is
   about 64px wide with room for the "3 left" count. */
.sdk-pad {
  display: grid; grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}
.sdk-num {
  min-height: 54px;
  min-width: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 2px;
  line-height: 1.05;
}
.sdk-num .sdk-num-n { font-size: 28px; font-weight: 600; }
.sdk-num .sdk-num-left { font-size: 12px; }
.sdk-num.is-done .sdk-num-n { text-decoration: line-through; text-decoration-thickness: 3px; opacity: .6; }

/* Tablet width: one row of nine is wide enough again */
@container sdk (min-width: 520px) {
  .sdk-pad { grid-template-columns: repeat(9, 1fr); }
  .sdk-num { min-height: 62px; }
  .sdk-tool { min-height: 62px; font-size: 15px; }
}

/* Wide: bigger tools, 3 × 3 pad */
@container sdk (min-width: 880px) {
  .sdk-tool { min-height: 76px; font-size: 16px; gap: 4px; }
  .sdk-icon { width: 24px; height: 24px; }
  .sdk-badge { font-size: 11px; top: 4px; right: 4px; padding: 3px 5px; }
  .sdk-pad { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .sdk-num { min-height: 68px; }
  .sdk-num .sdk-num-n { font-size: 34px; }
  .sdk-num .sdk-num-left { font-size: 12px; }
  .sdk-status { min-height: 3.4em; }
  .sdk-status:empty { display: block; visibility: hidden; }
}

/* ---------- Move box ---------- */
.sdk-command {
  background: var(--sdk-panel);
  border-radius: var(--sdk-radius);
  padding: 14px 16px 16px;
}
.sdk-command-label { display: block; font-weight: 700; font-size: 1.05em; }
.sdk-command-help { font-size: 16px; color: var(--sdk-ink-muted); margin: 2px 0 10px; line-height: 1.6; }
.sdk kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .85em;
  background: var(--sdk-btn-bg); color: var(--sdk-btn-ink);
  border-radius: 4px; padding: 1px 5px;
  white-space: nowrap;
}
.sdk-command-row { display: flex; gap: 8px; }
.sdk-command input {
  flex: 1; min-width: 0;
  min-height: 48px;
  font: inherit; font-size: 1.1em;
  padding: 6px 12px;
  color: var(--sdk-ink);
  background: var(--sdk-cell-bg);
  border: 2px solid var(--sdk-input-border);
  border-radius: 8px;
}
.sdk-command input:focus-visible { border-color: var(--sdk-focus); outline-offset: 2px; }

/* ---------- New game ---------- */
.sdk fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
.sdk legend { font-weight: 700; padding: 0; margin-bottom: 6px; }
.sdk-levels { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.sdk-levels label {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 44px; padding: 4px 14px 4px 10px;
  background: var(--sdk-panel);
  border: 2px solid var(--sdk-line-thin);
  border-radius: 999px;
  cursor: pointer;
}
.sdk-levels label:has(input:checked) { border-color: var(--sdk-line); font-weight: 600; }
.sdk input[type="radio"], .sdk input[type="checkbox"] {
  width: 22px; height: 22px; margin: 0; flex: none;
  accent-color: #2D3448;
}
:root[data-theme="dark"] .sdk input { accent-color: #FFD800; }
.sdk-newgame-row { display: flex; flex-wrap: wrap; gap: 10px; }

/* ---------- Panels (Settings, How to play) ---------- */
.sdk-panel {
  margin-top: 24px;
  background: var(--sdk-panel);
  border-radius: var(--sdk-radius);
}
.sdk-panel summary {
  cursor: pointer;
  padding: 12px 18px;
  font-weight: 700;
  font-size: 1.05em;
  min-height: 48px;
}
.sdk-panel-body { padding: 0 18px 18px; }
.sdk-panel-body fieldset { margin-bottom: 16px; }
.sdk-panel-body fieldset label {
  display: flex; align-items: center; gap: 10px;
  min-height: 44px;
  cursor: pointer;
}
.sdk-panel-note { font-size: 16px; color: var(--sdk-ink-muted); margin: 0; }
.sdk-prose h2 { font-size: 1.15em; margin: 1.2em 0 .3em; }
.sdk-prose h2:first-child { margin-top: 0; }
.sdk-prose p { margin: .4em 0; }

.sdk-more { margin: 24px 0 0; }

/* ---------- Dialogs ---------- */
.sdk-dialog {
  border: 0;
  border-radius: 14px;
  padding: 24px 26px;
  max-width: min(460px, calc(100vw - 32px));
  background: var(--sdk-cell-bg);
  color: var(--sdk-ink);
  font: inherit;
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
}
.sdk-dialog::backdrop { background: rgba(22, 26, 36, .65); }
.sdk-dialog h2 { margin: 0 0 8px; font-size: 1.4em; }
.sdk-dialog p { margin: 0 0 20px; }
.sdk-dialog-actions { display: flex; flex-wrap: wrap; gap: 10px; }

/* ---------- Motion ---------- */
@media (prefers-reduced-motion: no-preference) {
  .sdk-cell { transition: background-color .12s ease; }
}

/* ---------- Windows Contrast Themes ---------- */
@media (forced-colors: active) {
  .sdk .sdk-board, .sdk .sdk-board td { border-color: CanvasText; }
  .sdk-cell { background: Canvas; color: CanvasText; }
  .sdk-cell.is-selected { background: Highlight; color: HighlightText; forced-color-adjust: none; }
  .sdk-cell.is-same:not(.is-selected) { outline: 2px dashed CanvasText; outline-offset: -6px; }
  .sdk-cell.is-wrong .sdk-val { text-decoration-color: CanvasText; }
  .sdk-tool[aria-pressed="true"] { border: 3px solid Highlight; }
  .sdk-btn, .sdk-tool, .sdk-num { border: 2px solid ButtonText; }
  .sdk-status { border-left-color: CanvasText; }
  .sdk-panel, .sdk-command { border: 1px solid CanvasText; }
}

@media print {
  .sdk-col-controls, .sdk-statbar, .sdk-status, .sdk-panel, .sdk-keys, .sdk-more { display: none; }
}

/* Win dialog stats */
.sdk-win-stats { margin: -8px 0 20px; padding: 10px 14px; background: var(--sdk-panel); border-radius: 8px; }
.sdk-win-stats:empty { display: none; }
.sdk-win-stats p { margin: 0; }
.sdk-win-best { font-weight: 700; }