:root {
  --paper: #f3f0e9;
  --paper-deep: #ded5c7;
  --ink: #1e1e1c;
  --muted: #74716b;
  --line: rgba(16, 19, 15, .18);
  --forest: #15251b;
  --forest-soft: #294536;
  --chalk: #f6f3ec;
  --ease: cubic-bezier(.16, 1, .3, 1);
  font-family: Inter, "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { overscroll-behavior: none; }
body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(16,19,15,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16,19,15,.025) 1px, transparent 1px),
    var(--paper);
  background-size: 44px 44px;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.game-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 56px;
}
.game-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 17px 0;
  border-bottom: 1px solid var(--ink);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.game-nav a { font-weight: 700; }
.game-nav-actions { display: flex; align-items: center; gap: 10px; }
.game-nav-actions > a { min-height: 42px; display: inline-flex; align-items: center; }
.game-language { position: relative; }
.game-language-toggle {
  display: inline-flex;
  width: 44px;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 0;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .12em;
}
.game-language-panel {
  position: absolute;
  z-index: 20;
  top: calc(100% + 7px);
  right: 0;
  display: none;
  grid-template-columns: repeat(4, 44px);
  padding: 5px;
  border: 1px solid var(--ink);
  background: rgba(244,241,234,.96);
  backdrop-filter: blur(18px);
}
.game-language.is-open .game-language-panel { display: block; }
.game-language-panel button { min-height: 42px; padding: 0; border: 0; font-size: 10px; }
.game-language-panel button.is-active { color: var(--paper); background: var(--ink); }
.game-language .game-language-toggle { border-radius: 50%; }
.game-language .game-language-panel { width: 176px; height: 176px; left: auto; padding: 0; border-radius: 50%; background: var(--paper); }
.game-language .game-language-panel button { position: absolute; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 50%; }
.game-language-panel button:nth-child(1) { top: 8px; left: 65px; }
.game-language-panel button:nth-child(2) { top: 65px; right: 8px; }
.game-language-panel button:nth-child(3) { bottom: 8px; left: 65px; }
.game-language-panel button:nth-child(4) { top: 65px; left: 8px; }
.game-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  align-items: end;
  padding: 54px 0 28px;
}
.game-title {
  max-width: 8ch;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3.4rem, 9vw, 7.4rem);
  font-weight: 400;
  line-height: .82;
  letter-spacing: 0;
}
.game-header .muted { max-width: 33ch; margin: 0; }
.game-panel {
  padding: clamp(18px, 3vw, 34px);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.3);
}
.game-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(190px, 280px);
  gap: clamp(24px, 5vw, 72px);
  align-items: start;
}
.game-stage {
  display: grid;
  min-width: 0;
  place-items: center;
  padding: clamp(12px, 3vw, 28px);
  background: var(--forest);
  width: 100%;
}
.game-sidebar { display: grid; gap: 24px; align-content: start; }
.game-sidebar h2 { margin: 0; font: 400 1.7rem/1 Georgia, serif; }
.game-actions { display: flex; flex-wrap: wrap; gap: 9px; margin: 0; }
.game-score {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-block: 1px solid var(--line);
}
.game-score span { color: var(--muted); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; }
.game-score strong { font: 400 2rem/1 Georgia, serif; }
.muted { color: var(--muted); font-size: 14px; line-height: 1.7; }

button {
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--ink);
  border-radius: 0;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  transition: color 280ms var(--ease), background 280ms var(--ease), transform 280ms var(--ease);
}
button:hover { color: var(--paper); background: var(--ink); transform: translateY(-2px); }
button:active { transform: scale(.97); }
button.primary { color: var(--paper); background: var(--ink); }
button[disabled] { opacity: .4; cursor: not-allowed; }

.grid-2048 {
  display: grid;
  width: min(100%, 560px);
  grid-template-columns: repeat(4, minmax(54px, 1fr));
  gap: clamp(7px, 1.5vw, 13px);
  padding: clamp(9px, 2vw, 16px);
  background: var(--forest);
  touch-action: none;
}
.tile {
  display: grid;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(246,243,236,.2);
  color: var(--chalk);
  background: rgba(246,243,236,.06);
  font: 400 clamp(1.35rem, 5vw, 2.7rem)/1 Georgia, serif;
}
canvas {
  display: block;
  max-width: 100%;
  border: 1px solid rgba(246,243,236,.18);
  background: var(--forest);
  touch-action: none;
}
.game-layout--tetris .game-stage { min-height: min(72svh, 720px); }
.game-layout--tetris canvas { width: auto; height: min(68svh, 680px); aspect-ratio: 1 / 2; }
.game-layout--square canvas { width: min(100%, 620px); aspect-ratio: 1; }
.touch-controls { display: grid; justify-content: center; }
.touch-controls--dpad {
  grid-template: repeat(3, 54px) / repeat(3, 54px);
  grid-template-areas: ". up ." "left center right" ". down .";
  gap: 3px;
  touch-action: none;
}
.touch-controls--dpad button { min-width: 0; min-height: 54px; padding: 0; font-size: 20px; line-height: 1; }
.dpad-up { grid-area: up; }
.dpad-left { grid-area: left; }
.dpad-right { grid-area: right; }
.dpad-down { grid-area: down; }
.dpad-center {
  grid-area: center;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: rgba(21,37,27,.06);
}
.dpad-center::after { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--forest); opacity: .55; }
.touch-secondary { width: 165px; justify-self: center; margin-top: 8px; font-size: 10px; letter-spacing: .12em; text-transform: uppercase; }

.game-hub { padding-bottom: 80px; }
.game-hub-header { max-width: 900px; padding: clamp(68px, 10vw, 140px) 0 clamp(40px, 7vw, 88px); }
.game-hub-title { max-width: 8ch; margin: 10px 0 24px; font: 400 clamp(4rem, 11vw, 9.5rem)/.82 Georgia, serif; }
.game-hub-intro { max-width: 45ch; }
.game-catalogue { display: grid; grid-template-columns: repeat(12, 1fr); border-top: 1px solid var(--ink); }
.game-card { grid-column: span 6; display: grid; min-height: 320px; padding: clamp(24px, 4vw, 54px); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background 360ms var(--ease), transform 360ms var(--ease); }
.game-card:nth-child(even) { border-right: 0; }
.game-card:nth-child(1), .game-card:nth-child(4) { background: #e6ddd0; }
.game-card:nth-child(2), .game-card:nth-child(5) { background: #dce4e5; }
.game-card:nth-child(3) { background: #eadcdb; }
.game-card:hover { background: rgba(255,255,255,.32); transform: translateY(-3px); }
.game-card-index { color: var(--muted); font-size: 10px; letter-spacing: .16em; }
.game-card h2 { align-self: end; margin: 40px 0 12px; font: 400 clamp(2.6rem, 6vw, 5rem)/.88 Georgia, serif; }
.game-card p { margin: 0; color: var(--muted); font-size: 13px; }
.game-card-action { align-self: end; justify-self: start; margin-top: 32px; padding-bottom: 5px; border-bottom: 1px solid currentColor; font-size: 10px; letter-spacing: .13em; text-transform: uppercase; }
.memory-panel { display: grid; gap: 24px; }
.memory-grid, .lights-grid { display: grid; grid-template-columns: repeat(4, minmax(60px, 1fr)); gap: 10px; max-width: 560px; }
.memory-card, .light-cell { min-height: 110px; padding: 0; border: 1px solid var(--ink); background: rgba(255,255,255,.22); font: 400 clamp(2rem, 6vw, 4rem)/1 Georgia, serif; }
.memory-card.is-open { color: var(--paper); background: var(--forest-soft); }
.lights-grid { grid-template-columns: repeat(5, minmax(42px, 1fr)); }
.light-cell { min-height: 76px; background: var(--ink); }
.light-cell.is-on { background: #d7a64a; }
.game-hub-title, .game-title { font-size: clamp(36px, 5vw, 64px); line-height: 1.15; max-width: none; }
.game-header { padding: 44px 0 28px; }
.game-hub-header { padding: 60px 0 44px; }
.game-catalogue { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px; border: 0; }
.game-catalogue .game-card { grid-column: auto; min-width: 0; min-height: 260px; display: flex; flex-direction: column; padding: 28px; border: 1px solid var(--line); background: #ece6dc; }
.game-catalogue .game-card:nth-child(3n+2) { background: #dce4e5; }
.game-catalogue .game-card:nth-child(3n) { background: #eadcdb; }
.game-catalogue .game-card h2 { align-self: stretch; margin: 32px 0 14px; font-size: clamp(26px, 3vw, 40px); line-height: 1.2; overflow-wrap: anywhere; }
.game-catalogue .game-card p { font-size: 15px; line-height: 1.7; max-width: 35ch; }
.game-catalogue .game-card-action { margin-top: auto; padding-top: 24px; font-size: 12px; }
.game-panel { border-radius: 8px; }
.game-score strong { font-size: 28px; }
@media (max-width: 700px) { .game-catalogue { grid-template-columns: 1fr; } .game-catalogue .game-card { grid-column: 1; } }
.game-card--wide {
  grid-column: span 12;
  min-height: 280px;
  grid-template-columns: minmax(0, 1.4fr) minmax(220px, .6fr);
  column-gap: 40px;
  border-right: 0;
}
.game-card--wide .game-card-index { grid-column: 1 / -1; }
.game-card--wide h2 { grid-column: 1; }
.game-card--wide p { grid-column: 2; grid-row: 2; align-self: end; }
.game-card--wide .game-card-action { grid-column: 2; }

.word-shell { width: min(1240px, calc(100% - 40px)); }
.word-header .game-title { max-width: 11ch; font-size: clamp(4rem, 8vw, 7.6rem); }
.word-layout { grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr); }
.word-stage { min-height: 570px; padding: clamp(18px, 4vw, 54px); }
.word-card { display: grid; width: min(100%, 720px); min-height: 430px; align-content: space-between; padding: clamp(24px, 4.5vw, 58px); border: 1px solid rgba(246,243,236,.22); color: var(--chalk); }
.word-card-meta { display: flex; justify-content: space-between; gap: 20px; color: rgba(246,243,236,.58); font-size: 9px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.word-clue { max-width: 29ch; margin: 50px 0; font: 400 clamp(1.7rem, 3.2vw, 3.2rem)/1.12 Georgia, serif; }
.word-slots { display: flex; flex-wrap: wrap; gap: clamp(5px, 1vw, 10px); }
.word-slot { width: clamp(40px, 6vw, 62px); min-height: clamp(54px, 7vw, 72px); padding: 0; border-color: rgba(246,243,236,.45); color: var(--chalk); background: transparent; font: 400 clamp(1.5rem, 3vw, 2.5rem)/1 Georgia, serif; }
.word-slot.is-fixed { border-color: transparent; border-bottom-color: rgba(246,243,236,.25); color: rgba(246,243,236,.56); opacity: 1; }
.word-slot.is-selected { color: var(--forest); background: var(--chalk); }
.word-slot:hover:not(:disabled) { color: var(--forest); background: var(--chalk); transform: translateY(-2px); }
.word-message { min-height: 42px; margin: 36px 0 0; color: rgba(246,243,236,.62); font-size: 12px; line-height: 1.6; }
.word-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.letter-keyboard { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.letter-keyboard button { min-width: 0; min-height: 40px; padding: 0; font-size: 11px; }
.word-actions { display: grid; grid-template-columns: 1fr 1fr; }
.word-actions button { min-width: 0; padding-inline: 10px; font-size: 11px; }
.word-actions #next { grid-column: 1 / -1; }

.sudoku-board {
  display: grid;
  width: min(100%, 610px);
  aspect-ratio: 1;
  grid-template-columns: repeat(9, 1fr);
  border: 2px solid var(--chalk);
  background: var(--forest);
}
.sudoku-cell {
  display: grid;
  min-width: 0;
  min-height: 0;
  place-items: center;
  padding: 0;
  border: 0;
  border-right: 1px solid rgba(246,243,236,.2);
  border-bottom: 1px solid rgba(246,243,236,.2);
  color: var(--chalk);
  background: transparent;
  font: 400 clamp(1rem, 4vw, 2rem)/1 Georgia, serif;
}
.sudoku-cell:nth-child(3n) { border-right-color: var(--chalk); }
.sudoku-cell:nth-child(n+19):nth-child(-n+27),
.sudoku-cell:nth-child(n+46):nth-child(-n+54) { border-bottom-color: var(--chalk); }
.sudoku-cell.is-fixed { color: #b7c7ba; background: rgba(255,255,255,.04); }
.sudoku-cell.is-selected { color: var(--forest); background: var(--chalk); }
.sudoku-cell.is-related:not(.is-selected) { background: rgba(246,243,236,.1); }
.sudoku-cell.is-error { color: #f3a89e; }
.sudoku-cell:hover { color: var(--forest); background: var(--chalk); transform: none; }
.number-pad { display: grid; grid-template-columns: repeat(5, 1fr); gap: 7px; }
.number-pad button { padding: 0; }

/* Daily Sudoku: a quiet paper-like solving desk. */
.game-kicker {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
}
.sudoku-shell { width: min(1400px, calc(100% - 48px)); }
.sudoku-header .game-title { max-width: none; font-size: clamp(4rem, 8vw, 7.5rem); }
.sudoku-workspace {
  display: grid;
  grid-template-columns: minmax(480px, 1.5fr) minmax(250px, .62fr) minmax(270px, .72fr);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.28);
}
.sudoku-play-area { min-width: 0; padding: clamp(18px, 2.6vw, 38px); }
.sudoku-statusbar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--ink);
  margin-bottom: 18px;
}
.sudoku-statusbar > div { display: grid; gap: 5px; padding: 12px 10px 4px 0; }
.sudoku-statusbar span,
.tool-heading span,
.guide-intro > span {
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
}
.sudoku-statusbar strong { font-size: 12px; font-weight: 500; }
.sudoku-stage { padding: clamp(10px, 2vw, 24px); }
.sudoku-message {
  min-height: 46px;
  padding: 14px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}
.sudoku-tools,
.sudoku-guide {
  min-width: 0;
  padding: clamp(22px, 2.7vw, 38px);
  border-left: 1px solid var(--line);
}
.sudoku-tools { display: flex; flex-direction: column; gap: 22px; }
.tool-heading { display: grid; gap: 8px; }
.tool-heading strong { font: 400 1.65rem/1.1 Georgia, serif; }
.sudoku-tools .number-pad { grid-template-columns: repeat(3, 1fr); gap: 5px; }
.sudoku-tools .number-pad button { min-height: 48px; font: 400 1.25rem/1 Georgia, serif; }
.sudoku-tools .number-pad button:last-child { grid-column: 2; }
.mode-row { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.mode-button { display: grid; height: 62px; place-items: center; gap: 3px; padding: 7px; font-size: 10px; }
.mode-button.is-active { color: var(--paper); background: var(--forest); }
.tool-icon { font: 400 1.2rem/1 Georgia, serif; }
.tool-icon--notes { font-size: .72rem; letter-spacing: .06em; }
.assist-list { display: grid; border-top: 1px solid var(--line); }
.assist-toggle {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 12px;
  align-items: start;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}
.assist-toggle input { width: 16px; height: 16px; margin: 2px 0 0; accent-color: var(--forest); }
.assist-toggle span { display: grid; gap: 4px; }
.assist-toggle strong { font-size: 12px; font-weight: 600; }
.assist-toggle small { color: var(--muted); font-size: 10px; line-height: 1.5; }
.sudoku-actions { display: grid; grid-template-columns: 1fr 1fr; }
.sudoku-actions button { min-width: 0; padding-inline: 8px; font-size: 11px; }
.sudoku-actions .primary,
.sudoku-actions button:last-child { grid-column: span 2; }
.tool-shortcuts { margin: auto 0 0; color: var(--muted); font-size: 9px; line-height: 1.7; }
kbd { padding: 1px 4px; border: 1px solid var(--line); font: inherit; }
.sudoku-guide { color: var(--chalk); background: var(--forest); }
.guide-intro { padding-bottom: 24px; border-bottom: 1px solid rgba(246,243,236,.2); }
.guide-intro > span { color: rgba(246,243,236,.55); }
.guide-intro h2 { margin: 12px 0 16px; font: 400 clamp(2rem, 3vw, 3.2rem)/.95 Georgia, serif; }
.guide-intro p { margin: 0; color: rgba(246,243,236,.65); font-size: 12px; line-height: 1.75; }
.technique-list { margin: 0; padding: 0; list-style: none; }
.technique-list li { border-bottom: 1px solid rgba(246,243,236,.2); }
.technique-button {
  display: grid;
  width: 100%;
  min-height: 66px;
  grid-template-columns: 25px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  border: 0;
  color: var(--chalk);
  text-align: left;
}
.technique-button:hover { color: var(--chalk); background: transparent; transform: none; }
.technique-button > span { color: rgba(246,243,236,.45); font-size: 9px; }
.technique-button strong { font-size: 12px; font-weight: 500; }
.technique-button small { color: rgba(246,243,236,.45); font-size: 8px; letter-spacing: .08em; text-transform: uppercase; }
.technique-button::after { content: "+"; grid-column: 3; grid-row: 1; justify-self: end; opacity: .7; }
.technique-button[aria-expanded="true"]::after { content: "−"; }
.technique-button small { margin-right: 18px; }
.technique-detail { padding: 0 25px 18px; }
.technique-detail p { margin: 0; color: rgba(246,243,236,.66); font-size: 11px; line-height: 1.7; }
.guide-source {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 26px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(246,243,236,.55);
  font-size: 10px;
  letter-spacing: .08em;
}
.sudoku-cell { position: relative; }
.sudoku-digit { pointer-events: none; }
.sudoku-notes {
  display: grid;
  position: absolute;
  inset: 5%;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  pointer-events: none;
}
.sudoku-notes span { display: grid; place-items: center; color: rgba(246,243,236,.72); font: 500 clamp(.42rem, .9vw, .67rem)/1 Inter, sans-serif; }
.sudoku-cell.is-selected .sudoku-notes span { color: var(--forest); }
.sudoku-cell.is-matching:not(.is-selected) { color: var(--chalk); background: rgba(120,162,132,.32); }
.sudoku-cell.is-error { color: #ff9f95; background: rgba(160,54,45,.22); }

@media (max-width: 1120px) {
  .sudoku-workspace { grid-template-columns: minmax(430px, 1.35fr) minmax(240px, .65fr); }
  .sudoku-guide { grid-column: 1 / -1; border-top: 1px solid var(--line); border-left: 0; }
  .technique-list { display: grid; grid-template-columns: 1fr 1fr; }
  .technique-list li:nth-child(odd) { border-right: 1px solid rgba(246,243,236,.2); }
}

@media (max-width: 760px) {
  .game-shell { width: calc(100% - 24px); padding-top: 10px; }
  .game-header { grid-template-columns: 1fr; gap: 18px; padding-top: 38px; }
  .game-title { font-size: clamp(3.2rem, 18vw, 5.4rem); }
  .game-layout { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .game-sidebar { grid-template-columns: 1fr; }
  .game-layout--tetris .game-stage { min-height: 0; }
  .game-layout--tetris canvas { height: min(62svh, 590px); }
  .game-panel { padding: 12px; }
  .game-nav { gap: 10px; }
  .game-nav > span { display: none; }
  .game-nav-actions { margin-left: auto; }
  .game-language-panel { position: fixed; top: 62px; right: 12px; left: 12px; grid-template-columns: repeat(4, 1fr); }
  .game-layout:not(.sudoku-workspace) .game-sidebar { padding: 4px 8px 12px; }
  .touch-controls--dpad { grid-template-rows: repeat(3, 58px); grid-template-columns: repeat(3, 58px); }
  .touch-controls--dpad button { min-height: 58px; }
  .game-hub-header { padding-top: 58px; }
  .game-hub-title { font-size: clamp(4.2rem, 21vw, 6.4rem); }
  .game-catalogue { grid-template-columns: 1fr; }
  .game-card { grid-column: 1; min-height: 250px; border-right: 0; }
  .game-card--wide { grid-template-columns: 1fr; }
  .game-card--wide .game-card-index,
  .game-card--wide h2,
  .game-card--wide p,
  .game-card--wide .game-card-action { grid-column: 1; grid-row: auto; }
  .word-shell { width: calc(100% - 20px); }
  .word-header .game-title { font-size: clamp(3.4rem, 17vw, 5.2rem); }
  .word-layout { grid-template-columns: 1fr; }
  .word-stage { min-height: 450px; padding: 8px; }
  .word-card { min-height: 420px; padding: 24px 16px; }
  .word-clue { margin: 38px 0; font-size: clamp(1.55rem, 8vw, 2.35rem); }
  .word-slot { width: clamp(36px, 11vw, 48px); min-height: 56px; }
  .letter-keyboard { grid-template-columns: repeat(7, 1fr); }
  .letter-keyboard button { min-height: 44px; }
  .sudoku-board { width: calc(100vw - 72px); max-width: 610px; }
  .sudoku-shell { width: calc(100% - 20px); }
  .sudoku-header .game-title { font-size: clamp(3.5rem, 18vw, 5.8rem); }
  .sudoku-workspace { grid-template-columns: minmax(0, 1fr); }
  .sudoku-play-area { padding: 12px; }
  .sudoku-tools,
  .sudoku-guide { border-top: 1px solid var(--line); border-left: 0; }
  .sudoku-tools { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .tool-heading,
  .assist-list,
  .sudoku-actions,
  .tool-shortcuts { grid-column: 1 / -1; }
  .sudoku-tools .number-pad { grid-template-columns: repeat(5, 1fr); }
  .sudoku-tools .number-pad button:last-child { grid-column: auto; }
  .technique-list { grid-template-columns: 1fr; }
  .technique-list li:nth-child(odd) { border-right: 0; }
  .sudoku-notes span { font-size: clamp(.38rem, 2.2vw, .65rem); }
}
@media (max-width: 420px) {
  .game-shell { width: calc(100% - 16px); }
  .game-nav { font-size: 9px; }
  .game-stage { padding: 8px; }
  .game-language-toggle { width: 40px; min-height: 40px; }
  .sudoku-cell { font-size: 1.1rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; transition-duration: 1ms !important; }
}