:root {
  color-scheme: dark;
  --ink: #f7fbf8;
  --muted: #9fb2ac;
  --panel: rgba(10, 19, 22, 0.82);
  --panel-solid: #101b1f;
  --line: rgba(214, 241, 229, 0.18);
  --line-bright: rgba(255, 255, 255, 0.3);
  --mint: #6de1a6;
  --blue: #68b7ff;
  --gold: #f5c45b;
  --pink: #ff7ac3;
  --danger: #ff6f61;
  --cyan: #46d6ca;
  --shadow: 0 22px 80px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  overflow-x: hidden;
  overflow-y: auto;
  background:
    radial-gradient(circle at 12% 14%, rgba(109, 225, 166, 0.2), transparent 28rem),
    radial-gradient(circle at 88% 8%, rgba(104, 183, 255, 0.2), transparent 24rem),
    linear-gradient(145deg, #081013 0%, #101922 46%, #08110e 100%);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
a {
  color: inherit;
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 1;
}

.sr-only {
  position: absolute;
  overflow: hidden;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.merge-app {
  position: relative;
  isolation: isolate;
  display: grid;
  align-content: start;
  grid-template-rows: auto;
  gap: 12px;
  width: 100%;
  min-height: 100svh;
  padding: 16px;
  overflow: visible;
}

.merge-app::before,
.merge-app::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.merge-app::before {
  inset: -20% -10%;
  z-index: -3;
  background:
    linear-gradient(118deg, transparent 0 23%, rgba(109, 225, 166, 0.1) 23% 25%, transparent 25% 48%, rgba(104, 183, 255, 0.09) 48% 50%, transparent 50% 100%),
    linear-gradient(72deg, transparent 0 34%, rgba(245, 196, 91, 0.08) 34% 35%, transparent 35% 100%);
  opacity: 0.92;
  transform: rotate(-2deg);
}

.merge-app::after {
  inset: auto 12% -14px;
  z-index: -2;
  height: 180px;
  background: linear-gradient(90deg, transparent, rgba(109, 225, 166, 0.18), rgba(104, 183, 255, 0.18), transparent);
  filter: blur(34px);
  opacity: 0.72;
}

.ambient-grid {
  position: absolute;
  inset: 0;
  z-index: -4;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 82%);
}

.titlebar,
.game-hud {
  position: relative;
  z-index: 2;
  width: min(1120px, 100%);
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.025)),
    rgba(9, 16, 19, 0.76);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 68px;
  padding: 10px 12px;
}

.brand-link {
  min-width: 0;
  text-decoration: none;
}

.brand {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: 12px;
}

.brand-mark {
  display: grid;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(245, 196, 91, 0.95), rgba(109, 225, 166, 0.92)),
    #f5c45b;
  color: #061013;
  font-size: 0.88rem;
  font-weight: 900;
  box-shadow: 0 12px 28px rgba(109, 225, 166, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.52);
}

.brand-title {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.brand-title strong {
  font-size: 1.28rem;
  line-height: 1;
}

.document-name {
  overflow: hidden;
  color: var(--muted);
  font-size: 0.78rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.game-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.game-nav a,
.game-nav button {
  min-height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.035)),
    rgba(255, 255, 255, 0.045);
  padding: 0 12px;
  text-decoration: none;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.game-nav a {
  display: inline-grid;
  place-items: center;
}

.game-nav a:hover,
.game-nav button:hover:not(:disabled),
.game-nav a:focus-visible,
.game-nav button:focus-visible {
  border-color: rgba(109, 225, 166, 0.8);
  background: rgba(109, 225, 166, 0.12);
  box-shadow: 0 0 0 3px rgba(109, 225, 166, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  outline: 3px solid #f5c45b;
  outline-offset: 4px;
}

.game-nav button:active:not(:disabled) {
  transform: translateY(1px);
}

.game-nav .nav-cta {
  border-color: rgba(245, 196, 91, 0.52);
  background:
    linear-gradient(135deg, rgba(245, 196, 91, 0.98), rgba(109, 225, 166, 0.9) 58%, rgba(104, 183, 255, 0.86));
  color: #071013;
  font-weight: 800;
  box-shadow: 0 12px 32px rgba(104, 183, 255, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.42);
}

.game-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px;
}

.hud-cluster {
  display: grid;
  flex: 1 1 auto;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.score-chip {
  position: relative;
  overflow: hidden;
  display: grid;
  min-height: 58px;
  align-content: center;
  gap: 3px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 8px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.025)),
    rgba(255, 255, 255, 0.052);
  padding: 8px 10px;
}

.score-chip::before {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.12), transparent 45%);
  opacity: 0.34;
  pointer-events: none;
}

.score-chip.current {
  border-color: rgba(109, 225, 166, 0.36);
  background:
    linear-gradient(145deg, rgba(109, 225, 166, 0.18), rgba(104, 183, 255, 0.06)),
    rgba(109, 225, 166, 0.08);
}

.score-chip.current::after {
  position: absolute;
  right: 12px;
  bottom: 7px;
  content: attr(data-gain);
  color: var(--gold);
  font-size: 0.82rem;
  font-weight: 950;
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
}

.score-chip.current.is-bumped::after {
  animation: score-pop 620ms ease-out;
}

.score-chip span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 750;
  text-transform: uppercase;
}

.score-chip strong {
  overflow: hidden;
  color: #ffffff;
  font-size: 1.24rem;
  font-weight: 900;
  line-height: 1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hud-status {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 180px;
  gap: 9px;
  padding: 8px 10px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--mint);
  box-shadow: 0 0 0 5px rgba(109, 225, 166, 0.12);
}

.round-status {
  margin: 0;
  color: #dfeee7;
  font-size: 0.92rem;
  font-weight: 800;
}

.game-stage-wrap {
  --merge-stage-size: min(calc(100vw - 42px), calc(100svh - 190px), 560px);
  min-height: calc(var(--merge-stage-size) + 2px);
  padding-top: 2px;
}

.game-stage {
  display: grid;
  width: 100%;
  height: 100%;
  min-height: var(--merge-stage-size);
  place-items: center;
}

.merge-panel {
  display: grid;
  align-content: center;
  justify-items: center;
  width: 100%;
  min-height: 0;
  gap: 12px;
}

.merge-board {
  --board-size: var(--merge-stage-size);
  --gap: 12px;
  --cell: calc((100% - (var(--gap) * 5)) / 4);
  position: relative;
  width: var(--board-size);
  height: var(--board-size);
  min-width: 260px;
  min-height: 260px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 10px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.025)),
    radial-gradient(circle at 26% 14%, rgba(109, 225, 166, 0.16), transparent 36%),
    radial-gradient(circle at 82% 80%, rgba(104, 183, 255, 0.14), transparent 36%),
    #122025;
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.12), inset 0 -20px 70px rgba(0, 0, 0, 0.28);
  touch-action: none;
}

.merge-board::before,
.merge-board::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.merge-board::before {
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.13), transparent 26%),
    linear-gradient(315deg, rgba(255, 255, 255, 0.06), transparent 34%);
  mix-blend-mode: screen;
  opacity: 0.62;
}

.merge-board::after {
  inset: 10px;
  z-index: 3;
  border: 1px solid rgba(255, 255, 255, 0.075);
  border-radius: 8px;
}

.merge-board:focus-visible {
  outline: 3px solid rgba(104, 183, 255, 0.75);
  outline-offset: 4px;
}

.board-grid,
.tile-layer {
  position: absolute;
  inset: var(--gap);
}

.board-grid {
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: var(--gap);
}

.board-grid span {
  border: 1px solid rgba(255, 255, 255, 0.055);
  border-radius: 8px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.085), rgba(255, 255, 255, 0.018)),
    rgba(4, 11, 13, 0.34);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.035), inset 0 -10px 24px rgba(0, 0, 0, 0.14);
}

.tile-layer {
  z-index: 2;
  pointer-events: none;
}

.tile {
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  width: var(--cell);
  height: var(--cell);
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background: #eef7f4;
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.45), inset 0 -10px 18px rgba(0, 0, 0, 0.08);
  color: #081013;
  font-size: 2rem;
  font-weight: 950;
  line-height: 1;
  overflow: hidden;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.22);
  transition: left 130ms ease, top 130ms ease, filter 130ms ease, transform 130ms ease;
  user-select: none;
  will-change: left, top, transform;
}

.tile::before {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.34), transparent 34%),
    linear-gradient(315deg, rgba(0, 0, 0, 0.09), transparent 42%);
  pointer-events: none;
}

.tile::after {
  position: relative;
  z-index: 1;
  content: attr(data-label);
}

.tile-x-0 {
  left: 0;
}

.tile-x-1 {
  left: calc(var(--cell) + var(--gap));
}

.tile-x-2 {
  left: calc(var(--cell) + var(--gap) + var(--cell) + var(--gap));
}

.tile-x-3 {
  left: calc(var(--cell) + var(--gap) + var(--cell) + var(--gap) + var(--cell) + var(--gap));
}

.tile-y-0 {
  top: 0;
}

.tile-y-1 {
  top: calc(var(--cell) + var(--gap));
}

.tile-y-2 {
  top: calc(var(--cell) + var(--gap) + var(--cell) + var(--gap));
}

.tile-y-3 {
  top: calc(var(--cell) + var(--gap) + var(--cell) + var(--gap) + var(--cell) + var(--gap));
}

.tile.large {
  font-size: 1.45rem;
}

.tile.xlarge {
  font-size: 1.08rem;
}

.tile[data-value="2"] {
  background: #eff8f3;
}

.tile[data-value="4"] {
  background: #d7f4e5;
}

.tile[data-value="8"] {
  background: linear-gradient(145deg, #9cf3c2, #54d995);
}

.tile[data-value="16"] {
  background: linear-gradient(145deg, #9bd3ff, #58aaf2);
}

.tile[data-value="32"] {
  background: linear-gradient(145deg, #ffb6d8, #f06da9);
}

.tile[data-value="64"] {
  background: linear-gradient(145deg, #ffa08d, #f46e5e);
}

.tile[data-value="128"] {
  background: linear-gradient(145deg, #ffe38a, #f0b94c);
}

.tile[data-value="256"] {
  background: linear-gradient(145deg, #86eee5, #35c9bc);
}

.tile[data-value="512"] {
  background: linear-gradient(145deg, #c4bfff, #8d7df5);
}

.tile[data-value="1024"] {
  background: linear-gradient(145deg, #fff69a, #ecd94c);
}

.tile[data-value="2048"] {
  background: linear-gradient(135deg, #f5c45b, #6de1a6 54%, #68b7ff);
  box-shadow: 0 18px 42px rgba(245, 196, 91, 0.28), 0 0 34px rgba(109, 225, 166, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.tile.tile-super {
  background: linear-gradient(135deg, #ffffff, #ff7ac3 45%, #68b7ff);
}

.tile.is-new {
  animation: tile-pop 150ms ease-out;
}

.tile.is-merged {
  animation: tile-merge 180ms ease-out;
  filter: saturate(1.18) brightness(1.05);
}

.game-menu {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: grid;
  place-items: center;
  padding: 18px;
  background:
    linear-gradient(135deg, rgba(6, 11, 13, 0.78), rgba(6, 11, 13, 0.48)),
    rgba(6, 11, 13, 0.58);
  opacity: 1;
  pointer-events: auto;
  transition: opacity 160ms ease, visibility 160ms ease;
  visibility: visible;
}

.game-menu.is-hidden {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.menu-card {
  position: relative;
  overflow: hidden;
  display: grid;
  justify-items: center;
  width: min(320px, 100%);
  gap: 12px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.11), rgba(255, 255, 255, 0.035)),
    rgba(10, 18, 21, 0.94);
  box-shadow: 0 26px 86px rgba(0, 0, 0, 0.56), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  padding: 20px;
  text-align: center;
}

.menu-card::before {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, rgba(245, 196, 91, 0.16), transparent 32%, rgba(104, 183, 255, 0.12));
  opacity: 0.7;
  pointer-events: none;
}

.menu-card > * {
  position: relative;
}

.menu-kicker {
  color: var(--mint);
  font-size: 0.74rem;
  font-weight: 850;
  text-transform: uppercase;
}

.menu-tile-stack {
  display: grid;
  grid-template-columns: repeat(4, 42px);
  gap: 7px;
}

.menu-tile-stack span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  color: #081013;
  font-size: 0.95rem;
  font-weight: 900;
}

.menu-tile-stack span:nth-child(1) {
  background: #eff8f3;
}

.menu-tile-stack span:nth-child(2) {
  background: #d7f4e5;
}

.menu-tile-stack span:nth-child(3) {
  background: #6de1a6;
}

.menu-tile-stack span:nth-child(4) {
  background: #68b7ff;
}

.menu-card strong {
  font-size: 2.15rem;
  line-height: 1;
}

.menu-meta {
  min-height: 1.2em;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.menu-button,
.menu-link {
  width: 100%;
  min-height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  font-weight: 900;
}

.menu-button {
  background: linear-gradient(135deg, #f5c45b, #6de1a6 60%, #68b7ff);
  color: #081013;
  box-shadow: 0 14px 34px rgba(109, 225, 166, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.42);
}

.menu-link {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.035)),
    rgba(255, 255, 255, 0.06);
}

.touch-pad {
  display: none;
  grid-template-columns: repeat(3, 48px);
  grid-template-areas:
    ". up ."
    "left down right";
  gap: 8px;
}

.touch-pad button {
  display: grid;
  min-width: 48px;
  min-height: 48px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.035)),
    rgba(255, 255, 255, 0.08);
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 900;
  touch-action: manipulation;
}

.touch-pad button:hover,
.touch-pad button:focus-visible {
  border-color: rgba(104, 183, 255, 0.74);
  background: rgba(104, 183, 255, 0.14);
  box-shadow: 0 0 0 3px rgba(104, 183, 255, 0.12);
  outline: 3px solid #f5c45b;
  outline-offset: 4px;
}

.touch-pad button:active {
  transform: translateY(1px);
}

.touch-pad button[data-dir="up"] {
  grid-area: up;
}

.touch-pad button[data-dir="left"] {
  grid-area: left;
}

.touch-pad button[data-dir="down"] {
  grid-area: down;
}

.touch-pad button[data-dir="right"] {
  grid-area: right;
}

body[data-game-state="won"] .status-dot {
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(245, 196, 91, 0.13);
}

body[data-game-state="over"] .status-dot {
  background: var(--danger);
  box-shadow: 0 0 0 5px rgba(255, 111, 97, 0.13);
}

.merge-board.is-shaking {
  animation: board-shake 280ms ease-in-out;
}

.merge-board.is-celebrating {
  animation: board-celebrate 920ms ease-out;
}

@keyframes score-pop {
  0% {
    opacity: 0;
    transform: translateY(6px) scale(0.92);
  }
  22% {
    opacity: 1;
    transform: translateY(-7px) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(-18px) scale(1);
  }
}

@keyframes board-shake {
  0%,
  100% {
    transform: translateX(0);
  }
  22% {
    transform: translateX(-5px);
  }
  46% {
    transform: translateX(5px);
  }
  70% {
    transform: translateX(-2px);
  }
}

@keyframes board-celebrate {
  0% {
    box-shadow: var(--shadow), 0 0 0 rgba(245, 196, 91, 0), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  }
  35% {
    box-shadow: var(--shadow), 0 0 80px rgba(245, 196, 91, 0.38), 0 0 120px rgba(109, 225, 166, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.18);
  }
  100% {
    box-shadow: var(--shadow), 0 0 0 rgba(245, 196, 91, 0), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  }
}

@keyframes tile-pop {
  0% {
    opacity: 0;
    transform: scale(0.76);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes tile-merge {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.08);
  }
}

@media (hover: none), (pointer: coarse) {
  .touch-pad {
    display: grid;
  }
}

@media (min-width: 780px) {
  .tile {
    font-size: 2.45rem;
  }

  .tile.large {
    font-size: 1.82rem;
  }

  .tile.xlarge {
    font-size: 1.32rem;
  }
}

@media (max-width: 760px) {
  .merge-app {
    gap: 8px;
    padding: 8px;
  }

  .titlebar {
    align-items: stretch;
    min-height: auto;
  }

  .brand {
    height: 100%;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
  }

  .document-name {
    display: none;
  }

  .game-nav {
    display: grid;
    flex: 0 0 min(210px, 56%);
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .game-nav a,
  .game-nav button {
    min-height: 34px;
    padding: 0 7px;
    font-size: 0.78rem;
  }

  .game-hud {
    align-items: stretch;
    flex-direction: column;
    gap: 7px;
    padding: 8px;
  }

  .hud-cluster {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 6px;
  }

  .score-chip {
    min-height: 50px;
    padding: 7px 6px;
  }

  .score-chip span {
    font-size: 0.62rem;
  }

  .score-chip strong {
    font-size: 1.02rem;
  }

  .hud-status {
    justify-content: center;
    min-width: 0;
    padding: 2px 6px 0;
  }

  .round-status {
    font-size: 0.84rem;
  }

  .merge-panel {
    gap: 8px;
  }

  .merge-board {
    --board-size: min(calc(100vw - 16px), calc(100svh - 300px));
    --gap: 8px;
    min-width: 190px;
    min-height: 190px;
  }

  .tile {
    font-size: 1.5rem;
  }

  .tile.large {
    font-size: 1.12rem;
  }

  .tile.xlarge {
    font-size: 0.86rem;
  }

  .menu-card {
    gap: 10px;
    padding: 16px;
  }

  .menu-tile-stack {
    grid-template-columns: repeat(4, 36px);
  }

  .menu-tile-stack span {
    width: 36px;
    height: 36px;
  }

  .menu-card strong {
    font-size: 1.78rem;
  }

  .touch-pad {
    display: grid;
    grid-template-columns: repeat(3, 46px);
    gap: 6px;
  }

  .touch-pad button {
    min-width: 46px;
    min-height: 46px;
  }
}

@media (max-height: 640px) {
  .merge-app {
    gap: 6px;
    padding: 6px;
  }

  .titlebar {
    padding: 7px;
  }

  .game-hud {
    padding: 6px;
  }

  .score-chip.moves {
    display: none;
  }

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

  .merge-board {
    --board-size: min(calc(100vw - 12px), calc(100svh - 292px));
  }

  .touch-pad button {
    min-height: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .game-nav a:hover,
  .game-nav button:hover:not(:disabled),
  .touch-pad button:hover {
    transform: none;
  }
}