:root {
  --bg: #f4f6fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #667085;
  --line: #d9e1ec;
  --accent: #111827;
  --accent-soft: #eef2ff;
  --gold: #d99a1b;
  --red: #c2410c;
  --green: #166534;
  --blue: #1d4ed8;
  --shadow: 0 16px 40px rgba(23, 32, 51, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
}

body {
  margin: 0;
  color: var(--ink);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial,
    sans-serif;
  line-height: 1.6;
  letter-spacing: 0;
}

a {
  color: inherit;
}

button {
  font: inherit;
}

.site-header {
  height: 60px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  padding: 0 28px;
  background: #172033;
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 80;
}

.brand {
  font-size: 20px;
  font-weight: 900;
  text-decoration: none;
  white-space: nowrap;
}

.desktop-nav {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 6px;
}

.desktop-nav a {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.84);
  text-decoration: none;
}

.desktop-nav a:hover,
.desktop-nav a:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
}

.header-download,
.mobile-menu {
  display: none;
}

main {
  padding: 28px 18px 0;
}

.home-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.home-top {
  padding: 22px 24px;
  background:
    linear-gradient(90deg, rgba(17, 24, 39, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(17, 24, 39, 0.05) 1px, transparent 1px), #fbfcff;
  background-size: 18px 18px;
  border-bottom: 1px solid var(--line);
}

.home-top h1 {
  margin: 0 0 4px;
  font-size: 34px;
  line-height: 1.15;
}

.home-top p {
  margin: 0;
  color: var(--muted);
  font-weight: 700;
}

.client-notice {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  background: #fff7e6;
  border-bottom: 1px solid #f1d39b;
  color: #68430d;
}

.client-notice.hidden {
  display: none;
}

.client-notice-icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: #f4d792;
  color: #6b4405;
  font-size: 18px;
  font-weight: 900;
}

.client-notice p {
  margin: 0;
  min-width: 0;
}

.client-notice a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border-radius: 6px;
  background: var(--gold);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.client-notice-close {
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 6px;
  background: rgba(104, 67, 13, 0.1);
  color: #68430d;
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
}

.chess-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  padding: 16px;
}

.chess-card {
  min-height: 108px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  text-decoration: none;
  transition:
    border-color 0.18s,
    transform 0.18s,
    box-shadow 0.18s;
}

.chess-card:hover,
.chess-card:focus-visible {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(23, 32, 51, 0.1);
  outline: none;
}

.card-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  color: #fff;
  font-size: 20px;
  font-weight: 900;
}

.card-icon.gomoku {
  background: #111827;
}

.card-icon.snake {
  background: #15803d;
}

.card-icon.mine {
  background: #0f8b8d;
}

.card-icon.block {
  background: #1d4ed8;
}

.card-icon.tile {
  background: #f59e0b;
  font-size: 16px;
}

.card-icon.sudoku {
  background: #2f6f9f;
}

.card-icon.spider {
  background: #1f7a5c;
}

.card-icon.link {
  background: #0f8b8d;
}

.card-icon.xiangqi {
  background: var(--red);
}

.card-icon.weiqi {
  background: var(--green);
}

.card-icon.chess {
  background: var(--blue);
}

.card-icon.reversi {
  background: #0f766e;
}

.card-icon.checkers {
  background: #9f1239;
}

.card-icon.tic {
  background: #7c2d12;
}

.chess-card strong {
  display: block;
  font-size: 18px;
  line-height: 1.2;
}

.chess-card b {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
}

.content-page {
  width: min(980px, 100%);
  margin: 28px auto 0;
  padding: 0 18px;
}

.content-page article {
  margin-bottom: 18px;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.content-page h1,
.content-page h2 {
  margin: 0 0 10px;
  line-height: 1.25;
}

.content-page h1 {
  font-size: 32px;
}

.content-page h2 {
  margin-top: 24px;
  font-size: 23px;
}

.content-page p,
.content-page li {
  color: var(--muted);
}

.content-page a {
  color: var(--accent);
  font-weight: 800;
}

.play-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.board-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  margin-bottom: 14px;
}

.board-head h1 {
  margin: 0 0 4px;
  font-size: 30px;
  line-height: 1.2;
}

.board-head p {
  margin: 0;
  color: var(--muted);
  font-weight: 800;
}

.play-download {
  min-height: 42px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  margin: -2px 0 14px;
  padding: 7px 10px;
  border: 1px solid #f1d39b;
  border-radius: 7px;
  background: #fff7e6;
  color: #68430d;
}

.play-download span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
}

.play-download a {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border-radius: 6px;
  background: var(--gold);
  color: #fff;
  font-size: 13px;
  font-weight: 900;
  text-decoration: none;
  white-space: nowrap;
}

.action-row,
.mode-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.action-row button,
.action-row a,
.mode-tabs button {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 900;
  text-decoration: none;
}

.action-row button:first-child,
.mode-tabs button.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.action-row button:disabled {
  cursor: not-allowed;
  color: #98a2b3;
  background: #eef2f7;
}

.game-layout {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) 220px;
  gap: 16px;
  align-items: start;
}

.board-wrap {
  display: grid;
  place-items: center;
  overflow: auto;
  padding: 12px;
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(17, 24, 39, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(17, 24, 39, 0.05) 1px, transparent 1px), #f8fafc;
  background-size: 18px 18px;
}

.info-panel {
  display: grid;
  gap: 10px;
}

.info-panel div {
  min-height: 72px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
}

.info-panel span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.info-panel strong {
  font-size: 20px;
  line-height: 1.2;
}

.snake-board-wrap {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(22, 101, 52, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(22, 101, 52, 0.08) 1px, transparent 1px), #eef7e8;
  background-size: 18px 18px;
}

.snake-layout {
  grid-template-columns: minmax(300px, 1fr) 240px;
  align-items: start;
}

.snake-canvas {
  width: min(640px, 100%);
  aspect-ratio: 1;
  display: block;
  border-radius: 8px;
  background: #173b28;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.12);
  touch-action: none;
}

.board-badge {
  position: absolute;
  left: 14px;
  top: 14px;
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  border-radius: 6px;
  background: rgba(23, 32, 51, 0.82);
  color: #fff;
  font-size: 13px;
  font-weight: 900;
  pointer-events: none;
}

.snake-side-panel {
  display: grid;
  gap: 10px;
}

.snake-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.snake-stat {
  min-height: 72px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
}

.snake-stat span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.snake-stat strong {
  font-size: 20px;
  line-height: 1.1;
}

.snake-level-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.snake-level-row button,
.dir-btn {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 900;
}

.snake-level-row button {
  padding: 0 8px;
}

.snake-level-row button.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.dir-pad {
  display: grid;
  grid-template-columns: repeat(3, 52px);
  grid-template-rows: repeat(3, 40px);
  justify-content: center;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
}

.dir-btn {
  padding: 0;
  background: #172033;
  color: #fff;
  border-color: #172033;
  font-size: 20px;
  line-height: 1;
}

.dir-up {
  grid-column: 2;
}

.dir-left {
  grid-column: 1;
  grid-row: 2;
}

.dir-right {
  grid-column: 3;
  grid-row: 2;
}

.dir-down {
  grid-column: 2;
  grid-row: 3;
}

.snake-links {
  display: grid;
  gap: 8px;
}

.snake-links a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.tetris-shell {
  width: min(1120px, 100%);
}

.tetris-speed-tabs {
  margin-bottom: 14px;
}

.tetris-speed-tabs button:first-child {
  color: var(--ink);
  background: #fff;
  border-color: var(--line);
}

.tetris-speed-tabs .mode-btn.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.tetris-score-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.tetris-score-grid div {
  min-height: 68px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #101828;
  color: #fff;
}

.tetris-score-grid span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
  font-weight: 800;
}

.tetris-score-grid strong {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 22px;
  line-height: 1.1;
  color: #f4c95d;
}

.tetris-layout {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) 260px;
  gap: 16px;
  align-items: start;
}

.tetris-board-panel,
.tetris-preview-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.tetris-board-panel {
  position: relative;
  display: grid;
  place-items: center;
  padding: 12px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(33, 102, 213, 0.055) 1px, transparent 1px),
    linear-gradient(rgba(33, 102, 213, 0.055) 1px, transparent 1px), #edf2f8;
  background-size: 18px 18px;
}

.tetris-board-canvas {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  background: #101828;
  touch-action: none;
}

.tetris-overlay {
  position: absolute;
  inset: 12px;
  display: grid;
  place-content: center;
  gap: 8px;
  text-align: center;
  border-radius: 6px;
  background: rgba(16, 24, 40, 0.72);
  color: #fff;
}

.tetris-overlay[hidden] {
  display: none;
}

.tetris-overlay strong {
  font-size: 28px;
  line-height: 1.2;
}

.tetris-overlay span {
  color: rgba(255, 255, 255, 0.82);
}

.tetris-side-panel {
  display: grid;
  gap: 12px;
}

.tetris-preview-grid {
  display: grid;
  gap: 12px;
}

.tetris-preview-card {
  padding: 12px;
}

.tetris-preview-card h2 {
  margin: 0 0 10px;
  font-size: 15px;
}

.tetris-preview-card canvas {
  width: 100%;
  display: block;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f8fafc;
}

.tetris-mini-btn,
.tetris-touch-controls button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
}

.tetris-mini-btn {
  width: 100%;
  margin-top: 10px;
}

.tetris-links {
  display: grid;
  gap: 8px;
}

.tetris-links a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.tetris-touch-controls {
  display: none;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 14px;
}

.tetris-touch-controls button {
  padding: 0 10px;
}

.tetris-status-text {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.game2048-shell {
  width: min(1120px, 100%);
}

.game2048-mode-tabs {
  margin-bottom: 14px;
}

.game2048-mode-tabs button:first-child {
  color: var(--ink);
  background: #fff;
  border-color: var(--line);
}

.game2048-mode-tabs .mode-btn.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.game2048-layout {
  display: grid;
  grid-template-columns: minmax(300px, 1fr) 260px;
  gap: 16px;
  align-items: start;
}

.game2048-board-panel,
.game2048-side-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.game2048-board-panel {
  position: relative;
  display: grid;
  place-items: center;
  padding: 14px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(245, 158, 11, 0.055) 1px, transparent 1px),
    linear-gradient(rgba(245, 158, 11, 0.055) 1px, transparent 1px), #edf2f8;
  background-size: 18px 18px;
}

.game2048-board {
  --game2048-gap: 12px;
  --game2048-tile-size: calc((100% - var(--game2048-gap) * 3) / 4);
  position: relative;
  width: min(520px, 100%);
  aspect-ratio: 1;
  padding: var(--game2048-gap);
  border-radius: 8px;
  background: #243447;
  cursor: grab;
  outline: none;
  touch-action: none;
  user-select: none;
}

.game2048-board.dragging {
  cursor: grabbing;
}

.game2048-board:focus-visible {
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.28);
}

.game2048-grid-cells,
.game2048-tile-layer {
  position: absolute;
  inset: var(--game2048-gap);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: var(--game2048-gap);
}

.game2048-grid-cell {
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.16);
}

.game2048-tile-layer {
  pointer-events: none;
}

.game2048-tile {
  position: absolute;
  left: calc(var(--x) * (var(--game2048-tile-size) + var(--game2048-gap)));
  top: calc(var(--y) * (var(--game2048-tile-size) + var(--game2048-gap)));
  width: var(--game2048-tile-size);
  height: var(--game2048-tile-size);
  display: grid;
  place-items: center;
  border-radius: 6px;
  color: #fff;
  font-size: clamp(24px, 7vw, 46px);
  font-weight: 900;
  line-height: 1;
  box-shadow: 0 6px 16px rgba(2, 6, 23, 0.16);
  transition:
    left 0.12s ease,
    top 0.12s ease,
    transform 0.12s ease;
}

.game2048-tile.tile-2 {
  background: #3b82f6;
}

.game2048-tile.tile-4 {
  background: #14b8a6;
}

.game2048-tile.tile-8 {
  background: #f59e0b;
}

.game2048-tile.tile-16 {
  background: #ef6c35;
}

.game2048-tile.tile-32 {
  background: #ef4444;
}

.game2048-tile.tile-64 {
  background: #c026d3;
}

.game2048-tile.tile-128 {
  background: #7c3aed;
  font-size: clamp(22px, 6vw, 42px);
}

.game2048-tile.tile-256 {
  background: #2563eb;
  font-size: clamp(22px, 6vw, 42px);
}

.game2048-tile.tile-512 {
  background: #0f766e;
  font-size: clamp(22px, 6vw, 42px);
}

.game2048-tile.tile-1024 {
  background: #b45309;
  font-size: clamp(18px, 5vw, 34px);
}

.game2048-tile.tile-2048 {
  background: #be123c;
  font-size: clamp(18px, 5vw, 34px);
}

.game2048-tile.tile-4096 {
  background: #334155;
  font-size: clamp(18px, 5vw, 34px);
}

.game2048-tile.tile-8192 {
  background: #111827;
  font-size: clamp(18px, 5vw, 34px);
}

.game2048-tile.tile-16384,
.game2048-tile.tile-super {
  background: #020617;
  font-size: clamp(15px, 4.4vw, 28px);
}

.game2048-result-overlay {
  position: absolute;
  inset: 14px;
  display: grid;
  place-items: center;
  padding: 20px;
  border-radius: 8px;
  background: rgba(16, 24, 40, 0.62);
  z-index: 20;
}

.game2048-result-overlay[hidden] {
  display: none;
}

.game2048-result-card {
  width: min(320px, 100%);
  display: grid;
  gap: 10px;
  padding: 22px;
  border-radius: 8px;
  background: #fff;
  text-align: center;
  box-shadow: var(--shadow);
}

.game2048-result-card strong {
  font-size: 24px;
  line-height: 1.2;
}

.game2048-result-card span {
  color: var(--muted);
}

.game2048-result-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.game2048-result-card button {
  min-height: 40px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
}

.game2048-result-actions button:first-child {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.game2048-side-panel {
  display: grid;
  gap: 12px;
  padding: 14px;
}

.game2048-status-card {
  min-height: 74px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 12px;
  border-radius: 8px;
  background: #f8fafc;
  border: 1px solid var(--line);
}

.game2048-status-card span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.game2048-status-card strong {
  overflow-wrap: anywhere;
  font-size: 17px;
  line-height: 1.3;
}

.game2048-mini-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.game2048-mini-board button {
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
}

.game2048-mini-board button:first-child {
  grid-column: 2;
}

.game2048-mini-board button:nth-child(2) {
  grid-column: 1;
}

.game2048-mini-board button:nth-child(3) {
  grid-column: 2;
}

.game2048-mini-board button:nth-child(4) {
  grid-column: 3;
  grid-row: 2;
}

.sudoku-shell {
  width: min(1120px, 100%);
}

.sudoku-mode-group {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.sudoku-mode-btn,
.sudoku-tool-grid button,
.sudoku-number-pad button,
.sudoku-finish-card button,
.sudoku-links a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
  text-decoration: none;
  transition:
    border-color 0.18s,
    background 0.18s,
    color 0.18s;
}

.sudoku-mode-btn:hover,
.sudoku-mode-btn:focus-visible,
.sudoku-tool-grid button:hover,
.sudoku-tool-grid button:focus-visible,
.sudoku-number-pad button:hover,
.sudoku-number-pad button:focus-visible,
.sudoku-finish-card button:hover,
.sudoku-finish-card button:focus-visible,
.sudoku-links a:hover,
.sudoku-links a:focus-visible,
.sudoku-cell:focus-visible {
  border-color: #2f6f9f;
  outline: none;
}

.sudoku-mode-btn.active,
.sudoku-tool-grid button.active,
.sudoku-tool-grid button.primary,
.sudoku-finish-card button {
  color: #fff;
  background: #2f6f9f;
  border-color: #2f6f9f;
}

.sudoku-tool-grid button:disabled {
  cursor: not-allowed;
  color: #98a2b3;
  background: #eef2f7;
  border-color: #e2e8f0;
}

.sudoku-score-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.sudoku-score-grid div {
  min-height: 68px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #101828;
  color: #fff;
}

.sudoku-score-grid span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
  font-weight: 800;
}

.sudoku-score-grid strong {
  overflow: hidden;
  color: #80d6ff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 22px;
  line-height: 1.1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sudoku-layout {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) 260px;
  gap: 16px;
  align-items: start;
}

.sudoku-board-panel,
.sudoku-side-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.sudoku-board-panel {
  position: relative;
  display: grid;
  place-items: center;
  padding: 14px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(47, 111, 159, 0.055) 1px, transparent 1px),
    linear-gradient(rgba(47, 111, 159, 0.055) 1px, transparent 1px), #edf2f8;
  background-size: 18px 18px;
}

.sudoku-board {
  width: min(620px, 100%);
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  grid-template-rows: repeat(9, 1fr);
  border: 3px solid #20557d;
  background: #20557d;
}

.sudoku-cell {
  position: relative;
  min-width: 0;
  min-height: 0;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid #c7d7e7;
  background: #fff;
  color: #20557d;
  font-size: clamp(22px, 5.6vw, 40px);
  font-weight: 900;
  line-height: 1;
  cursor: pointer;
}

.sudoku-cell:nth-child(3n) {
  border-right: 2px solid #20557d;
}

.sudoku-cell:nth-child(n + 19):nth-child(-n + 27),
.sudoku-cell:nth-child(n + 46):nth-child(-n + 54) {
  border-bottom: 2px solid #20557d;
}

.sudoku-cell.fixed {
  color: #172033;
  background: #f3f6fb;
}

.sudoku-cell.related {
  background: #eef6fd;
}

.sudoku-cell.same {
  background: #dbeefe;
}

.sudoku-cell.wrong {
  color: #c2410c;
  background: #fff1f2;
}

.sudoku-cell.selected {
  z-index: 1;
  background: #cfe6f7;
  box-shadow: inset 0 0 0 3px #2f6f9f;
}

.sudoku-cell.selected.wrong {
  background: #ffe2e5;
  box-shadow: inset 0 0 0 3px #dc2626;
}

.sudoku-notes {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  align-items: center;
  justify-items: center;
  color: #61758d;
  font-size: clamp(8px, 1.3vw, 14px);
  font-weight: 800;
}

.sudoku-finish-overlay {
  position: absolute;
  inset: 14px;
  display: grid;
  place-items: center;
  padding: 20px;
  border-radius: 8px;
  background: rgba(16, 24, 40, 0.62);
  z-index: 20;
}

.sudoku-finish-overlay[hidden] {
  display: none;
}

.sudoku-finish-card {
  width: min(320px, 100%);
  display: grid;
  gap: 10px;
  padding: 22px;
  border-radius: 8px;
  background: #fff;
  text-align: center;
  box-shadow: var(--shadow);
}

.sudoku-finish-card strong {
  font-size: 24px;
  line-height: 1.2;
}

.sudoku-finish-card span {
  color: var(--muted);
}

.sudoku-side-panel {
  display: grid;
  gap: 12px;
  padding: 14px;
}

.sudoku-status-card {
  min-height: 74px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 12px;
  border-radius: 8px;
  background: #f8fafc;
  border: 1px solid var(--line);
}

.sudoku-status-card span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.sudoku-status-card strong {
  overflow-wrap: anywhere;
  font-size: 17px;
  line-height: 1.3;
}

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

.sudoku-number-pad {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.sudoku-number-pad button {
  min-height: 54px;
  font-size: 22px;
  color: #20557d;
}

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

.mines-shell {
  width: min(1180px, 100%);
}

.mines-toolbar {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 18px;
  padding: 18px;
  background: #f9fbfe;
  border-bottom: 1px solid var(--line);
}

.mines-mode-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.mines-mode-btn,
.mines-action-btn,
.mines-custom-panel button,
.mines-dialog-actions button {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  transition:
    background 0.18s,
    border-color 0.18s,
    color 0.18s,
    transform 0.18s;
}

.mines-mode-btn {
  padding: 0 16px;
  font-weight: 800;
}

.mines-mode-btn:hover,
.mines-action-btn:hover,
.mines-mode-btn:focus-visible,
.mines-action-btn:focus-visible,
.mines-reset-btn:hover,
.mines-reset-btn:focus-visible,
.mines-custom-panel input:focus {
  border-color: #0f8b8d;
  outline: none;
}

.mines-mode-btn.active,
.mines-action-btn.active {
  background: #0f8b8d;
  color: #fff;
  border-color: #0f8b8d;
}

.mines-play-tools {
  display: grid;
  grid-template-columns: auto auto;
  gap: 8px;
  align-items: center;
}

.mines-action-toggle {
  display: grid;
  grid-template-columns: repeat(2, minmax(58px, 1fr));
  gap: 6px;
}

.mines-action-btn {
  min-width: 58px;
  padding: 0 12px;
  font-weight: 800;
}

.mines-score-strip {
  display: grid;
  grid-template-columns: 84px 48px 84px;
  gap: 10px;
  align-items: center;
}

.mines-score-item {
  min-width: 0;
  min-height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid #ccd4df;
  border-radius: 6px;
  background: #111827;
  color: #fff;
}

.mines-score-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.62);
}

.mines-score-item strong {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 22px;
  line-height: 1;
  color: #f14f45;
}

.mines-reset-btn {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid #ccd4df;
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
  font-size: 24px;
}

.mines-custom-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(110px, 1fr)) auto;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.mines-custom-panel[hidden] {
  display: none;
}

.mines-custom-panel label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.mines-custom-panel input {
  width: 100%;
  height: 40px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
}

.mines-custom-panel button {
  align-self: end;
  padding: 0 20px;
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
  font-weight: 800;
}

.mines-board-wrap {
  overflow: auto;
  padding: 22px;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  background:
    linear-gradient(90deg, rgba(15, 139, 141, 0.06) 1px, transparent 1px),
    linear-gradient(rgba(15, 139, 141, 0.06) 1px, transparent 1px), #edf2f8;
  background-size: 18px 18px;
}

.mines-board-frame {
  width: max-content;
  margin: 0 auto;
  padding: 12px;
  background: #b9c2cf;
  border: 1px solid #8e9aaa;
  border-radius: 6px;
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.45),
    inset 0 -2px 0 rgba(37, 45, 59, 0.2);
}

.mines-board {
  --cell-size: 34px;
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--cell-size));
  grid-auto-rows: var(--cell-size);
  gap: 2px;
  touch-action: manipulation;
  user-select: none;
}

.mines-cell {
  width: var(--cell-size);
  height: var(--cell-size);
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 4px;
  background: linear-gradient(145deg, #f7f9fc, #d8dee8);
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(12px, calc(var(--cell-size) * 0.52), 18px);
  font-weight: 900;
  line-height: 1;
  cursor: pointer;
  box-shadow:
    inset 2px 2px 0 rgba(255, 255, 255, 0.86),
    inset -2px -2px 0 rgba(75, 85, 99, 0.26);
}

.mines-cell:hover,
.mines-cell:focus-visible {
  filter: brightness(1.04);
  outline: 2px solid rgba(15, 139, 141, 0.42);
  outline-offset: -2px;
}

.mines-cell.revealed {
  background: #eef2f7;
  box-shadow: inset 0 0 0 1px rgba(134, 146, 164, 0.55);
  cursor: default;
}

.mines-cell.flagged {
  color: #c2413b;
}

.mines-cell.exploded {
  background: #f7c7c4;
  color: #7f1d1d;
}

.mines-cell.mine {
  color: #111827;
}

.mines-cell[data-number="1"] {
  color: #2563eb;
}

.mines-cell[data-number="2"] {
  color: #16803c;
}

.mines-cell[data-number="3"] {
  color: #dc2626;
}

.mines-cell[data-number="4"] {
  color: #4c1d95;
}

.mines-cell[data-number="5"] {
  color: #a14416;
}

.mines-cell[data-number="6"] {
  color: #087b83;
}

.mines-cell[data-number="7"] {
  color: #111827;
}

.mines-cell[data-number="8"] {
  color: #6b7280;
}

.mines-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: #fff;
}

.mines-status-row p {
  margin: 0;
}

.mines-best-text {
  font-weight: 800;
  color: #0b5f60;
  text-align: right;
}

.mines-dialog-backdrop {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(17, 24, 39, 0.55);
  z-index: 20;
}

.mines-dialog-backdrop[hidden] {
  display: none;
}

.mines-result-dialog {
  width: min(420px, 100%);
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.mines-result-dialog h2 {
  margin: 0 0 10px;
  line-height: 1.25;
}

.mines-result-dialog p {
  margin: 0 0 20px;
  color: var(--muted);
}

.mines-dialog-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.mines-dialog-actions button {
  padding: 0 18px;
}

.mines-dialog-actions button:first-child {
  background: #0f8b8d;
  color: #fff;
  border-color: #0f8b8d;
}

.spider-shell {
  width: min(1240px, 100%);
}

.spider-top {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 18px;
  background: #f9fbfe;
  border-bottom: 1px solid var(--line);
}

.spider-mode-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.spider-mode-btn,
.spider-control-bar button,
.spider-stock-card,
.spider-result-card button {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
  transition:
    border-color 0.18s,
    background 0.18s,
    color 0.18s;
}

.spider-mode-btn {
  padding: 0 16px;
}

.spider-mode-btn.active,
.spider-control-bar button:first-child,
.spider-result-card button {
  color: #fff;
  background: #1f7a5c;
  border-color: #1f7a5c;
}

.spider-mode-btn:hover,
.spider-mode-btn:focus-visible,
.spider-control-bar button:hover,
.spider-control-bar button:focus-visible,
.spider-stock-card:hover,
.spider-stock-card:focus-visible,
.spider-result-card button:hover,
.spider-result-card button:focus-visible {
  border-color: #1f7a5c;
  outline: none;
}

.spider-control-bar button:disabled,
.spider-stock-card:disabled {
  cursor: not-allowed;
  color: #97a3b6;
  background: #eef2f7;
  border-color: var(--line);
}

.spider-score-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(74px, 1fr));
  gap: 8px;
}

.spider-score-grid div {
  min-height: 48px;
  display: grid;
  place-items: center;
  padding: 4px 8px;
  border-radius: 6px;
  background: #101828;
  color: #fff;
}

.spider-score-grid span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
}

.spider-score-grid strong {
  max-width: 100%;
  overflow: hidden;
  color: #f4c95d;
  text-overflow: ellipsis;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 20px;
  line-height: 1;
  white-space: nowrap;
}

.spider-play-area {
  position: relative;
  padding: 18px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px), #116149;
  background-size: 20px 20px;
}

.spider-table-top {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr) 240px;
  gap: 12px;
  align-items: stretch;
  margin-bottom: 14px;
}

.spider-stock-card {
  min-height: 74px;
  display: grid;
  place-content: center;
  gap: 2px;
  padding: 8px;
  background: #fff;
}

.spider-stock-card span {
  color: var(--muted);
  font-size: 13px;
}

.spider-stock-card strong {
  font-size: 18px;
}

.spider-foundation-grid {
  display: grid;
  grid-template-columns: repeat(8, minmax(54px, 1fr));
  gap: 8px;
}

.spider-foundation-pile {
  min-height: 74px;
  display: grid;
  place-items: center;
  padding: 4px;
  border: 1px dashed rgba(255, 255, 255, 0.48);
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.7);
  background: rgba(11, 63, 50, 0.36);
  font-weight: 900;
  text-align: center;
}

.spider-foundation-pile.black,
.spider-foundation-pile.red {
  border-style: solid;
  background: #fff;
  color: #111827;
}

.spider-foundation-pile.red {
  color: #c8433f;
}

.spider-status-card {
  min-height: 74px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 12px;
  border-radius: 6px;
  background: #fff;
  border: 1px solid var(--line);
}

.spider-status-card span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.spider-status-card strong {
  overflow-wrap: anywhere;
  font-size: 16px;
  line-height: 1.35;
}

.spider-tableau-scroll {
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-color: rgba(255, 255, 255, 0.45) rgba(11, 63, 50, 0.4);
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
}

.spider-tableau {
  --card-top: 5px;
  --card-step: 28px;
  --card-height: 104px;
  --table-min-height: 560px;
  min-width: 980px;
  min-height: var(--table-min-height);
  display: grid;
  grid-template-columns: repeat(10, minmax(84px, 1fr));
  gap: 8px;
  align-items: start;
}

.spider-column {
  position: relative;
  min-height: calc(var(--table-min-height) - 12px);
  padding: 5px;
  border-radius: 8px;
  background: rgba(11, 63, 50, 0.32);
  outline: 1px solid rgba(255, 255, 255, 0.08);
}

.spider-column.hint-target {
  outline: 2px solid #f4c95d;
  background: rgba(244, 201, 93, 0.14);
}

.spider-empty-slot {
  height: 118px;
  display: grid;
  place-items: center;
  border: 1px dashed rgba(255, 255, 255, 0.42);
  border-radius: 7px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  font-weight: 800;
}

.spider-card {
  --offset: 0;
  position: absolute;
  top: calc(var(--card-top) + var(--offset) * var(--card-step));
  left: 5px;
  right: 5px;
  height: var(--card-height);
  display: grid;
  grid-template-rows: auto 1fr;
  justify-items: start;
  gap: 2px;
  padding: 8px;
  border: 1px solid rgba(15, 23, 42, 0.18);
  border-radius: 7px;
  background: #fff;
  color: #111827;
  box-shadow: 0 3px 8px rgba(2, 6, 23, 0.22);
  cursor: pointer;
  user-select: none;
  touch-action: manipulation;
}

.spider-card.face-down {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.2) 25%, transparent 25%) 0 0 / 14px 14px,
    linear-gradient(135deg, transparent 75%, rgba(255, 255, 255, 0.2) 75%) 0 0 / 14px 14px,
    #174b8e;
  border-color: rgba(255, 255, 255, 0.2);
}

.spider-card.face-up.red {
  color: #c8433f;
}

.spider-card span {
  font-size: 18px;
  font-weight: 900;
  line-height: 1;
}

.spider-card strong {
  align-self: end;
  justify-self: end;
  font-size: 28px;
  line-height: 1;
}

.spider-card.selected {
  transform: translateY(-5px);
  outline: 3px solid #f4c95d;
  z-index: 20;
}

.spider-card.hint-source {
  outline: 3px solid rgba(244, 201, 93, 0.72);
  z-index: 18;
}

.spider-result-overlay {
  position: absolute;
  inset: 18px;
  display: grid;
  place-items: center;
  padding: 20px;
  border-radius: 8px;
  background: rgba(16, 24, 40, 0.62);
  z-index: 50;
}

.spider-result-overlay[hidden] {
  display: none;
}

.spider-result-card {
  width: min(300px, 100%);
  display: grid;
  gap: 10px;
  padding: 22px;
  border-radius: 8px;
  background: #fff;
  text-align: center;
  box-shadow: var(--shadow);
}

.spider-result-card strong {
  font-size: 24px;
  line-height: 1.2;
}

.spider-result-card span {
  color: var(--muted);
}

.spider-result-card button {
  width: 100%;
}

.spider-control-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 0 18px 18px;
  background: #116149;
}

.linkgame-score-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.linkgame-score-grid div {
  min-height: 54px;
  display: grid;
  place-items: center;
  gap: 2px;
  padding: 6px 8px;
  border-radius: 8px;
  background: #101828;
  color: #fff;
}

.linkgame-score-grid span {
  color: rgba(255, 255, 255, 0.64);
  font-size: 12px;
  font-weight: 800;
}

.linkgame-score-grid strong {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 20px;
  line-height: 1;
  color: #6ee7b7;
  white-space: nowrap;
}

.linkgame-mode-group {
  display: flex;
  flex-wrap: wrap;
  justify-self: end;
  gap: 8px;
}

.linkgame-mode-btn,
.linkgame-control-bar button,
.linkgame-result-card button {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
  transition:
    border-color 0.18s,
    background 0.18s,
    color 0.18s,
    transform 0.18s;
}

.linkgame-mode-btn {
  padding: 0 16px;
}

.linkgame-mode-btn.active,
.linkgame-control-bar button:first-child,
.linkgame-result-card button {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.linkgame-mode-btn:hover,
.linkgame-mode-btn:focus-visible,
.linkgame-control-bar button:hover,
.linkgame-control-bar button:focus-visible,
.linkgame-result-card button:hover,
.linkgame-result-card button:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.linkgame-play-area {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 16px;
  align-items: start;
  padding: 12px;
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(15, 139, 141, 0.055) 1px, transparent 1px),
    linear-gradient(rgba(15, 139, 141, 0.055) 1px, transparent 1px), #edf5f5;
  background-size: 18px 18px;
}

.linkgame-board-panel,
.linkgame-side-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.linkgame-board-panel {
  position: relative;
  display: grid;
  gap: 12px;
  justify-items: center;
  padding: 14px;
  overflow: hidden;
}

.linkgame-board-status {
  width: min(820px, 100%);
  min-height: 44px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 10px;
}

.linkgame-board-status span {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  border-radius: 6px;
  background: #ccfbf1;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
}

.linkgame-board-status strong {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--ink);
  font-size: 15px;
  white-space: nowrap;
}

.linkgame-board {
  --cols: 10;
  --rows: 8;
  width: min(820px, 100%);
  aspect-ratio: var(--cols) / var(--rows);
  display: grid;
  grid-template-columns: repeat(var(--cols), 1fr);
  grid-template-rows: repeat(var(--rows), 1fr);
  gap: 7px;
  padding: 10px;
  border-radius: 8px;
  background: #182537;
  touch-action: manipulation;
  user-select: none;
}

.linkgame-tile {
  min-width: 0;
  min-height: 0;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
  font-size: clamp(15px, 2.8vw, 27px);
  font-weight: 900;
  line-height: 1;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.25),
    0 5px 12px rgba(2, 6, 23, 0.22);
  transition:
    opacity 0.14s,
    transform 0.14s,
    box-shadow 0.14s;
}

.linkgame-tile:hover,
.linkgame-tile:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.linkgame-tile.empty {
  pointer-events: none;
  opacity: 0;
  box-shadow: none;
}

.linkgame-tile.linkgame-type-0 {
  background: #0f8b8d;
}

.linkgame-tile.linkgame-type-1 {
  background: #ef4444;
}

.linkgame-tile.linkgame-type-2 {
  background: #f59e0b;
}

.linkgame-tile.linkgame-type-3 {
  background: #16a34a;
}

.linkgame-tile.linkgame-type-4 {
  background: #2563eb;
}

.linkgame-tile.linkgame-type-5 {
  background: #7c3aed;
}

.linkgame-tile.linkgame-type-6 {
  background: #db2777;
}

.linkgame-tile.linkgame-type-7 {
  background: #475569;
}

.linkgame-tile.linkgame-selected {
  transform: translateY(-3px) scale(1.04);
  box-shadow:
    0 0 0 3px #fde047,
    inset 0 1px 0 rgba(255, 255, 255, 0.28),
    0 8px 18px rgba(2, 6, 23, 0.24);
  z-index: 3;
}

.linkgame-tile.linkgame-hint {
  animation: linkgameHintPulse 0.72s ease-in-out infinite alternate;
  box-shadow:
    0 0 0 3px #6ee7b7,
    inset 0 1px 0 rgba(255, 255, 255, 0.28),
    0 8px 18px rgba(2, 6, 23, 0.24);
}

.linkgame-side-panel {
  display: grid;
  gap: 12px;
  padding: 14px;
}

.linkgame-control-bar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.linkgame-control-bar button {
  width: 100%;
}

.linkgame-status-card {
  min-height: 74px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 12px;
  border-radius: 6px;
  background: #f8fafc;
  border: 1px solid var(--line);
}

.linkgame-status-card span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.linkgame-status-card strong {
  overflow-wrap: anywhere;
  font-size: 18px;
  line-height: 1.25;
}

.linkgame-result-overlay {
  position: absolute;
  inset: 14px;
  display: grid;
  place-items: center;
  padding: 20px;
  border-radius: 8px;
  background: rgba(16, 24, 40, 0.62);
  z-index: 50;
}

.linkgame-result-overlay[hidden] {
  display: none;
}

.linkgame-result-card {
  width: min(310px, 100%);
  display: grid;
  gap: 10px;
  padding: 22px;
  border-radius: 8px;
  background: #fff;
  text-align: center;
  box-shadow: var(--shadow);
}

.linkgame-result-card strong {
  font-size: 24px;
  line-height: 1.2;
}

.linkgame-result-card span {
  color: var(--muted);
}

@keyframes linkgameHintPulse {
  from {
    transform: translateY(-2px) scale(1);
  }
  to {
    transform: translateY(-4px) scale(1.06);
  }
}

.gomoku-board,
.xiangqi-board,
.western-board,
.reversi-board,
.checkers-board,
.tic-board {
  width: min(680px, 100%);
  aspect-ratio: 1;
  display: grid;
  touch-action: manipulation;
  user-select: none;
}

.gomoku-board {
  grid-template-columns: repeat(15, 1fr);
  grid-template-rows: repeat(15, 1fr);
  padding: 8px;
  border-radius: 8px;
  background: #d8a657;
}

.gomoku-cell {
  position: relative;
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 0;
  padding: 0;
  border: 0;
  background:
    linear-gradient(#5f3a16, #5f3a16) center / 100% 1px no-repeat,
    linear-gradient(90deg, #5f3a16, #5f3a16) center / 1px 100% no-repeat;
  cursor: pointer;
}

.stone {
  display: block;
  aspect-ratio: 1;
  width: 74%;
  height: auto;
  border-radius: 50%;
  box-shadow: 0 2px 5px rgba(2, 6, 23, 0.35);
}

.stone.black {
  background: #111827;
}

.stone.white {
  background: #f8fafc;
  border: 1px solid #cbd5e1;
}

.xiangqi-board {
  grid-template-columns: repeat(9, 1fr);
  grid-template-rows: repeat(10, 1fr);
  aspect-ratio: 9 / 10;
  padding: 8px;
  border-radius: 8px;
  background: #d9a85f;
}

.xiangqi-cell,
.western-cell,
.go-cell {
  position: relative;
  display: grid;
  place-items: center;
  border: 1px solid rgba(17, 24, 39, 0.24);
  cursor: pointer;
}

.xiangqi-cell {
  background: #e7bd78;
}

.xiangqi-cell.shade {
  background: #e0b46c;
}

.xiangqi-cell.selected,
.western-cell.selected {
  outline: 3px solid #facc15;
  z-index: 2;
}

.xiangqi-piece {
  width: 82%;
  height: 82%;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #fff7ed;
  border: 2px solid currentColor;
  font-size: clamp(16px, 4vw, 30px);
  font-weight: 900;
  box-shadow: 0 2px 5px rgba(2, 6, 23, 0.24);
}

.xiangqi-piece.red {
  color: #b91c1c;
}

.xiangqi-piece.black {
  color: #111827;
}

.go-board {
  --size: 9;
  --go-min: 270px;
  width: min(680px, 100%);
  min-width: min(680px, var(--go-min));
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(var(--size), 1fr);
  grid-template-rows: repeat(var(--size), 1fr);
  padding: 8px;
  border-radius: 8px;
  background: #d8a657;
  touch-action: manipulation;
  user-select: none;
}

.go-cell {
  border: 0;
  background:
    linear-gradient(#5f3a16, #5f3a16) center / 100% 1px no-repeat,
    linear-gradient(90deg, #5f3a16, #5f3a16) center / 1px 100% no-repeat;
}

.western-board {
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  border: 1px solid #111827;
  border-radius: 8px;
  overflow: hidden;
}

.western-cell {
  border: 0;
  font-size: clamp(26px, 7vw, 52px);
  line-height: 1;
}

.western-cell.light {
  background: #f1d9b5;
}

.western-cell.dark {
  background: #7b4f2c;
}

.white-piece {
  color: #fff;
  text-shadow: 0 2px 4px rgba(2, 6, 23, 0.75);
}

.black-piece {
  color: #111827;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.42);
}

.reversi-board,
.checkers-board {
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  border: 1px solid #123524;
  border-radius: 8px;
  overflow: hidden;
}

.reversi-cell,
.checkers-cell,
.tic-cell {
  position: relative;
  display: grid;
  place-items: center;
  border: 0;
  cursor: pointer;
  touch-action: manipulation;
}

.reversi-cell {
  background: #15803d;
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.reversi-cell.hint::after,
.checkers-cell.hint::after {
  content: "";
  width: 28%;
  height: 28%;
  border-radius: 50%;
  background: rgba(250, 204, 21, 0.82);
  box-shadow: 0 0 0 3px rgba(250, 204, 21, 0.22);
}

.disc,
.checker-piece {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  width: 76%;
  height: auto;
  border-radius: 50%;
  box-shadow: 0 4px 10px rgba(2, 6, 23, 0.35);
}

.disc.black {
  background: #111827;
}

.disc.white {
  background: #f8fafc;
  border: 1px solid #cbd5e1;
}

.checkers-board {
  border-color: #111827;
}

.checkers-cell.light {
  background: #f1d9b5;
}

.checkers-cell.dark {
  background: #7b4f2c;
}

.checkers-cell.selected {
  outline: 3px solid #facc15;
  z-index: 2;
}

.checker-piece.red {
  background: #dc2626;
  border: 3px solid #fecaca;
}

.checker-piece.black {
  background: #111827;
  border: 3px solid #9ca3af;
}

.checker-piece.king::after {
  content: "";
  width: 44%;
  height: 44%;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.72);
}

.tic-board {
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  width: min(520px, 100%);
  max-width: 520px;
  gap: 8px;
  padding: 8px;
  border-radius: 8px;
  background: #172033;
}

.tic-cell {
  min-height: 120px;
  border-radius: 7px;
  background: #f8fafc;
  color: #172033;
  font-size: clamp(54px, 10vw, 92px);
  font-weight: 900;
  line-height: 1;
}

.tic-cell.x {
  color: #1d4ed8;
}

.tic-cell.o {
  color: #c2410c;
}

.tic-cell.win {
  background: #fef3c7;
}

.game-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.game-card {
  min-height: 56px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
  color: var(--ink);
  text-decoration: none;
}

.game-card:hover,
.game-card:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.game-card-icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  color: #fff;
  font-size: 14px;
  font-weight: 900;
}

.game-card strong {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.2;
  white-space: nowrap;
}

.game-card-icon.snake {
  background: #15803d;
}

.game-card-icon.mine {
  background: #0f8b8d;
}

.game-card-icon.block {
  background: #172033;
}

.game-card-icon.gomoku {
  background: #111827;
}

.game-card-icon.spider {
  background: #166534;
}

.game-card-icon.tile {
  background: #2563eb;
  font-size: 12px;
}

.game-card-icon.jump {
  background: #d93a2f;
}

.game-card-icon.sudoku {
  background: #2f6f9f;
}

.game-card-icon.match {
  background: #e11d48;
}

.game-card-icon.link {
  background: #0f8b8d;
}

.game-card-icon.word {
  background: #7c3aed;
}

.game-card-icon.box {
  background: #d99a1b;
}

.site-footer {
  margin-top: 34px;
  padding: 22px 18px;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 6px 0;
}

.site-footer a {
  color: var(--accent);
  font-weight: 800;
  text-decoration: none;
}

@media (max-width: 800px) {
  .board-head,
  .game-layout {
    grid-template-columns: 1fr;
  }

  .tetris-layout {
    grid-template-columns: 1fr;
  }

  .game2048-layout {
    grid-template-columns: 1fr;
  }

  .mines-toolbar {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .spider-top,
  .spider-table-top {
    grid-template-columns: 1fr;
  }

  .linkgame-play-area {
    grid-template-columns: 1fr;
  }

  .linkgame-side-panel {
    grid-template-columns: minmax(0, 1.2fr) repeat(2, minmax(0, 1fr));
    align-items: stretch;
  }

  .linkgame-control-bar {
    grid-template-columns: repeat(3, 1fr);
  }

  .sudoku-layout {
    grid-template-columns: 1fr;
  }

  .tetris-preview-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .game2048-side-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mines-score-strip {
    justify-self: stretch;
    grid-template-columns: 1fr 52px 1fr;
  }

  .mines-action-toggle {
    grid-template-columns: repeat(2, 1fr);
  }

  .mines-play-tools {
    grid-template-columns: 1fr;
  }

  .spider-score-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .spider-foundation-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .spider-tableau {
    min-width: 820px;
    grid-template-columns: repeat(10, 76px);
  }

  .sudoku-side-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sudoku-status-card,
  .sudoku-links {
    grid-column: 1 / -1;
  }

  .info-panel {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .board-wrap {
    justify-content: flex-start;
  }
}

@media (max-width: 700px) {
  .site-header {
    height: 48px;
    grid-template-columns: minmax(0, 1fr) auto 40px;
    gap: 6px;
    padding: 0 8px;
  }

  .brand {
    font-size: 17px;
  }

  .desktop-nav {
    display: none;
  }

  .header-download {
    min-height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 10px;
    border-radius: 6px;
    background: #fff7e6;
    color: #68430d;
    border: 1px solid #e5c16b;
    font-size: 13px;
    font-weight: 800;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
  }

  .mobile-menu {
    display: block;
    position: relative;
  }

  .mobile-menu summary {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    gap: 4px;
    padding: 10px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.1);
    cursor: pointer;
    list-style: none;
  }

  .mobile-menu summary::-webkit-details-marker {
    display: none;
  }

  .mobile-menu span {
    width: 18px;
    height: 2px;
    display: block;
    border-radius: 2px;
    background: #fff;
  }

  .mobile-menu nav {
    position: fixed;
    top: 48px;
    right: 8px;
    z-index: 90;
    width: min(220px, calc(100vw - 16px));
    display: grid;
    gap: 4px;
    padding: 10px;
    border-radius: 8px;
    background: #172033;
    box-shadow: var(--shadow);
  }

  .mobile-menu:not([open]) nav {
    display: none;
  }

  .mobile-menu nav a {
    min-height: 42px;
    display: flex;
    align-items: center;
    padding: 0 12px;
    border-radius: 6px;
    color: #fff;
    text-decoration: none;
  }

  main {
    padding: 8px 8px 0;
  }

  .home-shell {
    overflow: visible;
  }

  .home-top {
    gap: 12px;
    padding: 16px 12px;
  }

  .home-top h1 {
    font-size: 28px;
  }

  .home-top p {
    font-size: 14px;
  }

  .client-notice {
    display: none;
  }

  .chess-grid {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 10px;
  }

  .chess-card {
    position: relative;
    min-height: 94px;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 10px;
    padding: 12px 76px 12px 12px;
  }

  .card-icon {
    width: 46px;
    height: 46px;
    font-size: 20px;
  }

  .chess-card strong {
    font-size: 19px;
  }

  .chess-card b {
    position: absolute;
    top: 10px;
    right: 10px;
    min-height: 28px;
    padding: 0 10px;
    font-size: 12px;
  }

  .content-page {
    margin-top: 14px;
    padding: 0 10px;
  }

  .content-page article {
    padding: 20px;
  }

  .content-page h1 {
    font-size: 26px;
  }

  .play-shell {
    padding: 8px;
    border-radius: 8px;
  }

  .board-head {
    gap: 8px;
    margin-bottom: 8px;
  }

  .board-head h1 {
    font-size: 23px;
  }

  .board-head p {
    min-height: 22px;
    font-size: 13px;
    line-height: 1.45;
  }

  .play-download {
    min-height: 36px;
    gap: 6px;
    margin: 0 0 8px;
    padding: 5px 6px;
  }

  .play-download span {
    font-size: 12px;
  }

  .play-download a {
    min-height: 28px;
    padding: 0 9px;
    font-size: 12px;
  }

  .linkgame-mode-group {
    justify-self: stretch;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5px;
  }

  .linkgame-mode-btn {
    min-height: 36px;
    padding: 0 4px;
    font-size: 13px;
  }

  .linkgame-score-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
    margin-bottom: 8px;
  }

  .linkgame-score-grid div {
    min-height: 42px;
    padding: 4px;
  }

  .linkgame-score-grid span {
    font-size: 10px;
  }

  .linkgame-score-grid strong {
    font-size: 15px;
  }

  .linkgame-play-area {
    gap: 8px;
    padding: 8px;
  }

  .linkgame-board-panel {
    gap: 8px;
    padding: 8px;
  }

  .linkgame-board-status {
    min-height: 34px;
    gap: 6px;
  }

  .linkgame-board-status span {
    min-height: 28px;
    padding: 0 8px;
    font-size: 12px;
  }

  .linkgame-board-status strong {
    font-size: 13px;
  }

  .linkgame-board {
    gap: 5px;
    padding: 6px;
  }

  .linkgame-tile {
    border-radius: 6px;
    font-size: clamp(13px, 4vw, 20px);
  }

  .linkgame-side-panel {
    position: sticky;
    bottom: 0;
    z-index: 45;
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 6px;
    padding-bottom: calc(6px + env(safe-area-inset-bottom));
    border-color: rgba(255, 255, 255, 0.18);
    background: #182537;
    box-shadow: 0 -8px 20px rgba(2, 6, 23, 0.18);
  }

  .linkgame-control-bar {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
  }

  .linkgame-control-bar button {
    min-height: 40px;
    font-size: 13px;
  }

  .linkgame-status-card {
    display: none;
  }

  .linkgame-result-overlay {
    position: fixed;
    inset: 0;
    padding: 16px;
    border-radius: 0;
    z-index: 100;
  }

  .linkgame-result-card {
    padding: 18px;
  }

  .snake-canvas {
    width: 100%;
    max-width: 640px;
  }

  .tetris-speed-tabs {
    margin-bottom: 8px;
  }

  .tetris-score-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
    margin-bottom: 8px;
  }

  .tetris-score-grid div {
    min-height: 54px;
    gap: 2px;
    padding: 8px;
    border-radius: 7px;
  }

  .tetris-score-grid span {
    font-size: 11px;
  }

  .tetris-score-grid strong {
    font-size: 18px;
  }

  .tetris-layout {
    gap: 8px;
  }

  .tetris-board-panel,
  .tetris-preview-card {
    padding: 8px;
    border-radius: 7px;
  }

  .tetris-overlay {
    inset: 8px;
  }

  .tetris-overlay strong {
    font-size: 22px;
  }

  .tetris-preview-grid {
    gap: 8px;
  }

  .tetris-preview-card h2 {
    margin-bottom: 8px;
    font-size: 14px;
  }

  .tetris-mini-btn {
    min-height: 34px;
    margin-top: 8px;
    font-size: 13px;
  }

  .tetris-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .tetris-links a {
    min-height: 34px;
    padding: 0 8px;
    font-size: 13px;
  }

  .tetris-touch-controls {
    display: grid;
    gap: 6px;
    margin-top: 8px;
  }

  .tetris-touch-controls button {
    min-height: 34px;
    font-size: 13px;
  }

  .tetris-status-text {
    margin-top: 8px;
    padding-top: 8px;
    font-size: 13px;
  }

  .game2048-mode-tabs {
    margin-bottom: 8px;
  }

  .mines-toolbar,
  .mines-custom-panel,
  .mines-status-row {
    padding: 10px;
  }

  .spider-top {
    grid-template-columns: minmax(132px, 0.92fr) minmax(0, 1.08fr);
    align-items: stretch;
    gap: 8px;
    padding: 8px;
  }

  .spider-mode-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5px;
  }

  .spider-mode-btn {
    min-height: 36px;
    padding: 0 4px;
    font-size: 13px;
  }

  .spider-score-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 5px;
  }

  .spider-score-grid div {
    min-height: 35px;
    padding: 2px 4px;
  }

  .spider-score-grid span {
    font-size: 10px;
  }

  .spider-score-grid strong {
    font-size: 15px;
  }

  .spider-play-area {
    padding: 6px;
  }

  .spider-table-top {
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 6px;
    margin-bottom: 6px;
  }

  .spider-stock-card {
    min-height: 66px;
    padding: 5px;
  }

  .spider-stock-card span {
    font-size: 12px;
  }

  .spider-stock-card strong {
    font-size: 16px;
  }

  .spider-foundation-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
  }

  .spider-foundation-pile {
    min-height: 31px;
    padding: 1px;
    border-radius: 5px;
    font-size: 10px;
  }

  .spider-status-card {
    grid-column: 1 / -1;
    min-height: 34px;
    display: flex;
    align-items: center;
    padding: 6px 8px;
  }

  .spider-status-card span {
    display: none;
  }

  .spider-status-card strong {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
  }

  .spider-tableau-scroll {
    margin: 0 -6px;
    padding: 0 6px 8px;
    scroll-snap-type: x proximity;
  }

  .spider-tableau {
    --card-top: 4px;
    --card-step: 20px;
    --card-height: 80px;
    --table-min-height: 438px;
    min-width: 650px;
    grid-template-columns: repeat(10, 60px);
    gap: 5px;
  }

  .spider-column {
    min-height: calc(var(--table-min-height) - 10px);
    padding: 4px;
    border-radius: 6px;
    scroll-snap-align: start;
  }

  .spider-empty-slot {
    height: var(--card-height);
    border-radius: 6px;
    font-size: 11px;
  }

  .spider-card {
    left: 4px;
    right: 4px;
    padding: 5px;
    border-radius: 6px;
  }

  .spider-card span {
    font-size: 14px;
  }

  .spider-card strong {
    font-size: 21px;
  }

  .spider-card.selected,
  .spider-card.hint-source {
    outline-width: 2px;
  }

  .spider-card.selected {
    transform: translateY(-3px);
  }

  .spider-result-overlay {
    position: fixed;
    inset: 0;
    padding: 16px;
    border-radius: 0;
    z-index: 100;
  }

  .spider-result-card {
    padding: 18px;
  }

  .spider-control-bar {
    position: sticky;
    bottom: 0;
    z-index: 45;
    gap: 6px;
    padding: 6px;
    padding-bottom: calc(6px + env(safe-area-inset-bottom));
    border-top: 1px solid rgba(255, 255, 255, 0.16);
    box-shadow: 0 -8px 20px rgba(2, 6, 23, 0.18);
  }

  .spider-control-bar button {
    min-height: 40px;
    font-size: 13px;
  }

  .mines-mode-tabs {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 5px;
  }

  .mines-mode-btn {
    min-height: 34px;
    padding: 0 4px;
    font-size: 13px;
  }

  .mines-score-strip {
    grid-template-columns: 1fr 44px 1fr;
    gap: 6px;
  }

  .mines-score-item {
    min-height: 44px;
  }

  .mines-score-label {
    font-size: 11px;
  }

  .mines-score-item strong {
    font-size: 20px;
  }

  .mines-reset-btn {
    width: 44px;
    height: 44px;
  }

  .mines-action-btn {
    min-height: 36px;
  }

  .mines-custom-panel {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  .mines-custom-panel label {
    font-size: 12px;
  }

  .mines-custom-panel input {
    height: 36px;
    padding: 0 8px;
  }

  .mines-custom-panel button {
    grid-column: 1 / -1;
    align-self: stretch;
  }

  .mines-board-wrap {
    padding: 8px;
  }

  .mines-board-frame {
    padding: 6px;
  }

  .mines-cell {
    border-radius: 3px;
  }

  .mines-status-row {
    display: grid;
    gap: 6px;
    font-size: 13px;
  }

  .mines-best-text {
    text-align: left;
  }

  .sudoku-mode-group {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    width: 100%;
  }

  .sudoku-mode-btn {
    min-height: 34px;
    padding: 0 8px;
    font-size: 13px;
  }

  .game2048-layout {
    gap: 8px;
  }

  .sudoku-score-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 6px;
    margin-bottom: 8px;
  }

  .sudoku-score-grid div {
    min-height: 54px;
    gap: 2px;
    padding: 8px;
    border-radius: 7px;
  }

  .sudoku-score-grid span {
    font-size: 11px;
  }

  .sudoku-score-grid strong {
    font-size: 18px;
  }

  .game2048-board-panel,
  .game2048-side-panel {
    padding: 8px;
    border-radius: 7px;
  }

  .sudoku-layout {
    gap: 8px;
  }

  .sudoku-board-panel,
  .sudoku-side-panel {
    padding: 8px;
    border-radius: 7px;
  }

  .sudoku-cell {
    font-size: clamp(18px, 7vw, 28px);
  }

  .sudoku-notes {
    font-size: clamp(7px, 2vw, 10px);
  }

  .sudoku-finish-overlay {
    inset: 8px;
    padding: 14px;
  }

  .sudoku-finish-card {
    padding: 16px;
    border-radius: 7px;
  }

  .sudoku-finish-card strong {
    font-size: 22px;
  }

  .sudoku-side-panel {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .sudoku-status-card {
    min-height: 46px;
    gap: 2px;
    padding: 8px;
    border-radius: 7px;
  }

  .sudoku-status-card span {
    display: none;
  }

  .sudoku-status-card strong {
    font-size: 13px;
  }

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

  .sudoku-tool-grid button {
    min-height: 36px;
    padding: 0 6px;
    font-size: 13px;
  }

  .sudoku-number-pad {
    grid-template-columns: repeat(9, minmax(0, 1fr));
    gap: 4px;
  }

  .sudoku-number-pad button {
    min-height: 38px;
    padding: 0;
    font-size: 17px;
  }

  .sudoku-links {
    gap: 6px;
  }

  .sudoku-links a {
    min-height: 34px;
    padding: 0 8px;
    font-size: 13px;
  }

  .game2048-board {
    --game2048-gap: 8px;
  }

  .game2048-result-overlay {
    inset: 8px;
    padding: 12px;
  }

  .game2048-result-card {
    padding: 16px;
    border-radius: 7px;
  }

  .game2048-result-card strong {
    font-size: 22px;
  }

  .game2048-side-panel {
    gap: 8px;
  }

  .game2048-status-card {
    min-height: 62px;
    gap: 2px;
    padding: 8px;
    border-radius: 7px;
  }

  .game2048-status-card span {
    font-size: 11px;
  }

  .game2048-status-card strong {
    font-size: 15px;
  }

  .game2048-mini-board {
    gap: 6px;
  }

  .game2048-mini-board button {
    min-height: 40px;
    font-size: 13px;
  }

  .board-badge {
    left: 10px;
    top: 10px;
    min-height: 26px;
    padding: 0 8px;
    font-size: 12px;
  }

  .snake-side-panel {
    gap: 8px;
  }

  .snake-stats {
    gap: 6px;
  }

  .snake-stat {
    min-height: 56px;
    gap: 2px;
    padding: 8px;
    border-radius: 7px;
  }

  .snake-stat span {
    font-size: 11px;
  }

  .snake-stat strong {
    font-size: 18px;
  }

  .snake-level-row {
    gap: 6px;
  }

  .snake-level-row button {
    min-height: 34px;
    font-size: 13px;
  }

  .dir-pad {
    grid-template-columns: repeat(3, 48px);
    grid-template-rows: repeat(3, 38px);
    gap: 6px;
    padding: 8px;
  }

  .dir-btn {
    font-size: 18px;
  }

  .snake-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .snake-links a {
    min-height: 34px;
    padding: 0 8px;
    font-size: 13px;
  }

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

  .action-row button,
  .action-row a,
  .mode-tabs button {
    min-height: 34px;
    padding: 0 8px;
    font-size: 13px;
  }

  .mode-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    margin-bottom: 8px;
  }

  .game-layout {
    gap: 8px;
  }

  .board-wrap {
    width: 100%;
    padding: 6px;
    place-items: start;
    border-radius: 7px;
    -webkit-overflow-scrolling: touch;
  }

  .gomoku-board,
  .xiangqi-board,
  .western-board,
  .reversi-board,
  .checkers-board,
  .tic-board {
    width: 100%;
    max-width: 680px;
  }

  .go-board {
    width: 100%;
    max-width: 680px;
    min-width: min(680px, var(--go-min));
  }

  .gomoku-board,
  .xiangqi-board,
  .go-board {
    padding: 5px;
  }

  .xiangqi-piece {
    font-size: clamp(14px, 5vw, 24px);
    border-width: 1px;
  }

  .western-cell {
    font-size: clamp(28px, 10vw, 44px);
  }

  .tic-board {
    max-width: 480px;
    gap: 5px;
    padding: 5px;
  }

  .tic-cell {
    min-height: 92px;
    font-size: clamp(48px, 18vw, 76px);
  }

  .stone {
    aspect-ratio: 1;
    width: 78%;
    height: auto;
  }

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

  .info-panel div {
    min-height: 48px;
    gap: 2px;
    padding: 7px;
    border-radius: 7px;
  }

  .info-panel span {
    font-size: 11px;
  }

  .info-panel strong {
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 16px;
    white-space: nowrap;
  }

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

  .game-card {
    min-height: 54px;
    padding: 8px;
  }

  .game-card-icon {
    width: 32px;
    height: 32px;
    font-size: 13px;
  }

  .game-card strong {
    font-size: 15px;
  }

  .site-footer {
    margin-top: 20px;
    padding: 18px 12px;
    font-size: 13px;
  }
}

@media (max-width: 380px) {
  .linkgame-mode-btn {
    min-height: 34px;
    font-size: 12px;
  }

  .linkgame-score-grid strong {
    font-size: 14px;
  }

  .linkgame-board {
    gap: 4px;
    padding: 5px;
  }

  .linkgame-tile {
    font-size: 13px;
  }

  .spider-top {
    grid-template-columns: minmax(120px, 0.9fr) minmax(0, 1.1fr);
  }

  .spider-mode-btn {
    min-height: 34px;
    font-size: 12px;
  }

  .spider-score-grid strong {
    font-size: 14px;
  }

  .spider-tableau {
    --card-step: 19px;
    --card-height: 76px;
    --table-min-height: 420px;
    min-width: 610px;
    grid-template-columns: repeat(10, 56px);
    gap: 4px;
  }

  .spider-card span {
    font-size: 13px;
  }

  .spider-card strong {
    font-size: 20px;
  }
}