:root {
  --v-orange: #ff8c42;
  --v-dark: #0b0e14;
  --v-card: #161b24;
  --v-grid: #242b36;
  --v-text-soft: rgba(255, 255, 255, 0.68);
  --v-glow: rgba(255, 140, 66, 0.25);
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(255, 140, 66, 0.08), transparent 38%),
    linear-gradient(180deg, #131821 0%, #0b0e14 100%);
  color: #fff;
  font-family: 'JetBrains Mono', monospace;
}

#game-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.game-shell {
  width: min(100%, 980px);
}

.game-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.title-block {
  max-width: 620px;
}

.game-title {
  margin: 0 0 10px;
  font-family: 'Exo 2', sans-serif;
  font-size: clamp(2.2rem, 3vw, 3.4rem);
  letter-spacing: -0.04em;
}

.game-subtitle {
  margin: 0;
  color: var(--v-text-soft);
  font-size: 0.98rem;
  line-height: 1.7;
}

.text-orange {
  color: var(--v-orange);
  text-shadow: 0 0 20px rgba(255, 140, 66, 0.35);
}

.score-cluster {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.score-box,
.utility-toggle {
  min-width: 130px;
  padding: 14px 18px;
  border: 1px solid rgba(255, 140, 66, 0.2);
  border-radius: 18px;
  background: rgba(22, 27, 36, 0.86);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.score-box small,
.utility-toggle-caption {
  display: block;
  margin-bottom: 6px;
  color: var(--v-text-soft);
  letter-spacing: 0.14em;
}

.score-value {
  font-family: 'Exo 2', sans-serif;
  font-size: 2rem;
  color: var(--v-orange);
}

.utility-toggle {
  min-width: 112px;
  text-align: left;
  color: #fff;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.utility-toggle:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 140, 66, 0.38);
}

.utility-toggle:focus-visible {
  outline: 2px solid rgba(255, 140, 66, 0.7);
  outline-offset: 3px;
}

.utility-toggle[data-sound-state="on"] {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), 0 0 0 1px rgba(255, 140, 66, 0.14);
}

.utility-toggle[data-sound-state="off"] {
  opacity: 0.68;
}

.utility-toggle-value {
  font-family: 'Exo 2', sans-serif;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--v-orange);
}

.achievement-box {
  background:
    linear-gradient(135deg, rgba(255, 140, 66, 0.12), rgba(255, 255, 255, 0.03)),
    rgba(22, 27, 36, 0.92);
}

.score-value-compact {
  font-size: 1.7rem;
}

.game-wrapper {
  position: relative;
  width: min(100%, 640px);
  margin-inline: auto;
  padding: 24px;
  border-radius: 30px;
  background:
    linear-gradient(145deg, rgba(255, 140, 66, 0.06), rgba(255, 255, 255, 0.02)),
    rgba(22, 27, 36, 0.92);
  border: 1px solid rgba(255, 140, 66, 0.16);
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.42);
}

.game-wrapper.has-combo-flare {
  animation: combo-flare 0.42s ease;
}

.game-wrapper.is-critical {
  animation: critical-shell 1.4s ease-in-out infinite;
}

.critical-alert {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 0;
  padding: 0 18px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  border-radius: 20px;
  border: 1px solid transparent;
  background: linear-gradient(135deg, rgba(255, 94, 94, 0.12), rgba(255, 140, 66, 0.08));
  transition: max-height 0.26s ease, opacity 0.22s ease, margin-bottom 0.22s ease, padding 0.22s ease, border-color 0.22s ease;
}

.critical-alert.is-active {
  max-height: 120px;
  margin-bottom: 16px;
  padding: 14px 18px;
  opacity: 1;
  border-color: rgba(255, 140, 66, 0.28);
}

.critical-pill {
  flex: none;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 140, 66, 0.18);
  color: #ffd7b9;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.critical-copy {
  font-family: 'Exo 2', sans-serif;
  font-size: 1rem;
}

.critical-meta {
  margin-left: auto;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.86rem;
}

.merge-board-shell {
  position: relative;
  overflow: hidden;
}

.fx-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 3;
}

.score-burst,
.combo-indicator {
  position: absolute;
  opacity: 0;
  border-radius: 999px;
  border: 1px solid rgba(255, 140, 66, 0.2);
  background: rgba(11, 14, 20, 0.82);
  box-shadow: 0 16px 45px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(8px);
}

.score-burst {
  top: 20px;
  right: 20px;
  padding: 10px 14px;
  font-family: 'Exo 2', sans-serif;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--v-orange);
}

.combo-indicator {
  top: 20px;
  left: 50%;
  padding: 11px 18px;
  font-size: 0.88rem;
  letter-spacing: 0.1em;
  color: #fff4de;
  text-transform: uppercase;
  transform: translateX(-50%);
}

.score-burst.is-visible {
  animation: score-burst 0.72s ease forwards;
}

.combo-indicator.is-visible {
  animation: combo-chip 1.05s cubic-bezier(0.2, 0.85, 0.25, 1) forwards;
}

.merge-board {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding: 16px;
  background: linear-gradient(180deg, rgba(11, 14, 20, 0.95), rgba(18, 23, 30, 0.95));
  border: 1px solid rgba(255, 140, 66, 0.14);
  border-radius: 24px;
}

.merge-board.is-critical {
  animation: critical-board 1.2s ease-in-out infinite;
}

.merge-cell {
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
  color: #f5efe8;
  font-family: 'Exo 2', sans-serif;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  border: 1px solid rgba(255, 255, 255, 0.04);
  transition: transform 0.16s ease, background-color 0.16s ease, box-shadow 0.16s ease;
}

.merge-cell.is-spawned {
  animation: tile-spawn 0.22s ease;
}

.merge-cell.is-merged {
  animation: tile-merge 0.34s cubic-bezier(0.18, 0.9, 0.3, 1.2);
}

.merge-cell[data-value="0"] {
  color: transparent;
  background: rgba(255, 255, 255, 0.035);
}

.merge-cell[data-value="2"] { background: #2b3442; }
.merge-cell[data-value="4"] { background: #344253; }
.merge-cell[data-value="8"] { background: #6a3f26; }
.merge-cell[data-value="16"] { background: #7d4424; }
.merge-cell[data-value="32"] { background: #92481d; }
.merge-cell[data-value="64"] { background: #b25518; box-shadow: 0 0 0 1px rgba(255, 140, 66, 0.25), 0 0 25px rgba(255, 140, 66, 0.16); }
.merge-cell[data-value="128"] { background: #c96a18; color: #0b0e14; }
.merge-cell[data-value="256"] { background: #dd7c1b; color: #0b0e14; }
.merge-cell[data-value="512"] { background: #ec9226; color: #0b0e14; }
.merge-cell[data-value="1024"] { background: #f4a93f; color: #0b0e14; }
.merge-cell[data-value="2048"] { background: linear-gradient(135deg, #ffe38d, #ff9e2f); color: #0b0e14; box-shadow: 0 0 35px rgba(255, 174, 54, 0.32); }
.merge-cell[data-value="4096"] { background: linear-gradient(135deg, #fff4c3, #ff8c42); color: #0b0e14; box-shadow: 0 0 42px rgba(255, 140, 66, 0.38); }

.overlay-menu {
  position: absolute;
  inset: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 34px;
  gap: 12px;
  border-radius: 24px;
  text-align: center;
  background: rgba(11, 14, 20, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 140, 66, 0.4);
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.5), inset 0 0 35px rgba(255, 140, 66, 0.08);
  z-index: 8;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  width: 100%;
  margin: 0 0 24px;
}

.result-box {
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.result-box span {
  display: block;
  color: var(--v-text-soft);
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.result-box strong {
  font-family: 'Exo 2', sans-serif;
  font-size: 1.55rem;
}

.overlay-menu h2,
.overlay-menu p,
.overlay-menu .result-grid,
.overlay-menu .btn {
  margin-bottom: 0 !important;
}

#game-over-menu {
  justify-content: flex-start;
}

.btn-venus {
  background: var(--v-orange);
  border: 1px solid var(--v-orange);
  color: var(--v-dark);
  font-weight: 800;
}

.btn-venus:hover {
  background: #e67e35;
  border-color: #e67e35;
  color: var(--v-dark);
}

.score-box.is-boosted {
  animation: box-boost 0.4s ease;
}

.score-value.is-pop {
  animation: score-pop 0.34s ease;
}

.info-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.info-card {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.info-label {
  display: block;
  margin-bottom: 6px;
  color: var(--v-text-soft);
  font-size: 0.82rem;
  letter-spacing: 0.15em;
}

.keyboard-hint {
  margin: 18px 0 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.54);
  font-size: 0.83rem;
  letter-spacing: 0.06em;
}

.mobile-controls {
  display: none;
  grid-template-columns: repeat(3, 72px);
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
}

.control-btn-up {
  grid-column: 2;
}

.control-btn {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  border: 1px solid rgba(255, 140, 66, 0.28);
  background: rgba(255, 255, 255, 0.04);
  color: var(--v-orange);
  font-size: 1.4rem;
  font-weight: 800;
}

.control-btn:focus-visible,
.btn:focus-visible,
.merge-board:focus-visible {
  outline: 2px solid var(--v-orange);
  outline-offset: 3px;
}

.is-hidden {
  display: none;
}

@media (min-width: 992px) {
  #game-container {
    justify-content: center;
    align-items: center;
    padding: 14px 18px 10px;
  }

  .game-shell {
    width: min(100%, 620px);
  }

  .game-header {
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    text-align: center;
  }

  .title-block {
    max-width: 560px;
  }

  .game-title {
    margin-bottom: 6px;
    font-size: clamp(1.8rem, 2.45vw, 2.6rem);
  }

  .game-subtitle {
    font-size: 0.86rem;
    line-height: 1.45;
  }

  .score-cluster {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    justify-content: center;
    width: min(100%, 520px);
  }

  .score-box,
  .utility-toggle {
    min-width: 0;
    padding: 10px 12px;
    border-radius: 14px;
  }

  .score-box small,
  .utility-toggle-caption {
    margin-bottom: 3px;
    font-size: 0.78rem;
  }

  .score-value {
    font-size: 1.45rem;
  }

  .score-value-compact,
  .utility-toggle-value {
    font-size: 1.05rem;
  }

  .game-wrapper {
    width: min(100%, 44dvh, 430px);
    padding: 14px;
    border-radius: 22px;
  }

  .critical-alert.is-active {
    margin-bottom: 10px;
    padding: 10px 12px;
  }

  .critical-pill {
    padding: 5px 9px;
    font-size: 0.68rem;
  }

  .critical-copy {
    font-size: 0.82rem;
  }

  .critical-meta {
    font-size: 0.72rem;
  }

  .score-burst {
    top: 10px;
    right: 10px;
    padding: 7px 10px;
    font-size: 0.9rem;
  }

  .combo-indicator {
    top: 10px;
    padding: 7px 12px;
    font-size: 0.68rem;
  }

  .merge-board {
    gap: 8px;
    padding: 10px;
    border-radius: 18px;
  }

  .merge-cell {
    border-radius: 12px;
    font-size: clamp(0.98rem, 1.55vw, 1.3rem);
  }

  .overlay-menu {
    inset: 10px;
    padding: 18px 16px;
    border-radius: 18px;
    gap: 10px;
  }

  .overlay-menu h2 {
    font-size: 1.28rem;
    line-height: 1.05;
  }

  .overlay-menu p.small {
    font-size: 0.84rem;
    line-height: 1.4;
  }

  .result-grid {
    gap: 8px;
  }

  .result-box {
    padding: 10px 12px;
    border-radius: 14px;
  }

  .result-box span {
    font-size: 0.74rem;
    margin-bottom: 4px;
  }

  .result-box strong {
    font-size: 1.18rem;
  }

  .overlay-menu .btn {
    padding-top: 0.78rem !important;
    padding-bottom: 0.78rem !important;
  }

  .info-strip {
    width: min(100%, 44dvh, 430px);
    margin: 8px auto 0;
    gap: 8px;
  }

  .info-card {
    padding: 10px 12px;
    border-radius: 14px;
  }

  .info-label {
    margin-bottom: 3px;
    font-size: 0.7rem;
  }

  .info-card strong {
    font-size: 0.82rem;
  }

  .keyboard-hint {
    width: min(100%, 44dvh, 430px);
    margin: 8px auto 0;
    font-size: 0.68rem;
  }
}

@media (min-width: 992px) and (max-height: 920px) {
  #game-container {
    padding: 10px 16px 8px;
  }

  .game-header {
    margin-bottom: 8px;
  }

  .game-title {
    font-size: clamp(1.65rem, 2.15vw, 2.3rem);
  }

  .game-subtitle {
    font-size: 0.8rem;
    line-height: 1.4;
  }

  .score-box,
  .utility-toggle {
    padding: 8px 10px;
  }

  .score-value {
    font-size: 1.28rem;
  }

  .score-value-compact,
  .utility-toggle-value {
    font-size: 0.96rem;
  }

  .game-wrapper {
    width: min(100%, 41dvh, 390px);
    padding: 12px;
  }

  .critical-alert.is-active {
    margin-bottom: 8px;
    padding: 8px 10px;
  }

  .overlay-menu {
    inset: 8px;
    padding: 14px 12px;
    gap: 8px;
  }

  .overlay-menu h2 {
    font-size: 1.08rem;
  }

  .overlay-menu p.small {
    font-size: 0.76rem;
  }

  .merge-board {
    gap: 7px;
    padding: 9px;
  }

  .merge-cell {
    font-size: clamp(0.92rem, 1.38vw, 1.18rem);
  }

  .info-strip {
    width: min(100%, 41dvh, 390px);
    margin-top: 6px;
  }

  .info-card {
    padding: 8px 10px;
  }

  .info-card strong {
    font-size: 0.76rem;
  }

  .keyboard-hint {
    width: min(100%, 41dvh, 390px);
    margin-top: 6px;
    font-size: 0.62rem;
  }

  .result-grid {
    gap: 6px;
  }

  .result-box {
    padding: 8px 10px;
  }

  .result-box strong {
    font-size: 1.02rem;
  }

  .overlay-menu .btn {
    padding-top: 0.62rem !important;
    padding-bottom: 0.62rem !important;
  }
}

@keyframes tile-spawn {
  0% {
    transform: scale(0.68);
    opacity: 0.3;
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes tile-merge {
  0% {
    transform: scale(0.92);
  }

  45% {
    transform: scale(1.13);
    box-shadow: 0 0 0 1px rgba(255, 140, 66, 0.26), 0 0 36px rgba(255, 140, 66, 0.24);
  }

  100% {
    transform: scale(1);
  }
}

@keyframes score-pop {
  0% {
    transform: scale(1);
  }

  45% {
    transform: scale(1.18);
  }

  100% {
    transform: scale(1);
  }
}

@keyframes box-boost {
  0% {
    transform: translateY(0);
    border-color: rgba(255, 140, 66, 0.2);
  }

  40% {
    transform: translateY(-3px);
    border-color: rgba(255, 140, 66, 0.55);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), 0 0 24px rgba(255, 140, 66, 0.18);
  }

  100% {
    transform: translateY(0);
    border-color: rgba(255, 140, 66, 0.2);
  }
}

@keyframes score-burst {
  0% {
    opacity: 0;
    transform: translate3d(0, 10px, 0) scale(0.88);
  }

  20% {
    opacity: 1;
  }

  100% {
    opacity: 0;
    transform: translate3d(0, -18px, 0) scale(1.06);
  }
}

@keyframes combo-chip {
  0% {
    opacity: 0;
    transform: translate(-50%, 10px) scale(0.88);
  }

  18% {
    opacity: 1;
    transform: translate(-50%, 0) scale(1.02);
  }

  100% {
    opacity: 0;
    transform: translate(-50%, -16px) scale(1.05);
  }
}

@keyframes combo-flare {
  0% {
    box-shadow: 0 26px 80px rgba(0, 0, 0, 0.42);
  }

  45% {
    box-shadow: 0 26px 80px rgba(0, 0, 0, 0.42), 0 0 44px rgba(255, 140, 66, 0.16);
  }

  100% {
    box-shadow: 0 26px 80px rgba(0, 0, 0, 0.42);
  }
}

@keyframes critical-shell {
  0%,
  100% {
    box-shadow: 0 26px 80px rgba(0, 0, 0, 0.42);
    border-color: rgba(255, 140, 66, 0.16);
  }

  50% {
    box-shadow: 0 26px 80px rgba(0, 0, 0, 0.42), 0 0 38px rgba(255, 98, 98, 0.16);
    border-color: rgba(255, 118, 118, 0.36);
  }
}

@keyframes critical-board {
  0%,
  100% {
    border-color: rgba(255, 140, 66, 0.14);
  }

  50% {
    border-color: rgba(255, 110, 110, 0.38);
    box-shadow: inset 0 0 24px rgba(255, 102, 102, 0.06);
  }
}

@media (max-width: 820px) {
  body {
    min-height: 100svh;
    overflow: hidden;
  }

  #game-container {
    min-height: 100svh;
    align-items: flex-start;
    padding:
      max(10px, env(safe-area-inset-top, 0px))
      12px
      calc(env(safe-area-inset-bottom, 0px) + 10px);
  }

  .game-shell {
    width: min(100%, 360px);
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .game-header {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-bottom: 0;
  }

  .game-title {
    margin-bottom: 6px;
    font-size: clamp(1.75rem, 8.4vw, 2.2rem);
    line-height: 1.03;
  }

  .game-subtitle {
    font-size: 0.82rem;
    line-height: 1.55;
  }

  .score-cluster {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    justify-content: stretch;
    width: 100%;
  }

  .score-box,
  .utility-toggle {
    min-width: 0;
    padding: 10px 8px;
    border-radius: 16px;
  }

  .score-box small,
  .utility-toggle-caption {
    margin-bottom: 2px;
    font-size: 0.66rem;
    letter-spacing: 0.1em;
  }

  .score-value {
    font-size: 1.34rem;
  }

  .score-value-compact,
  .utility-toggle-value {
    font-size: 0.94rem;
  }

  .critical-alert {
    align-items: flex-start;
    flex-direction: column;
  }

  .critical-meta {
    margin-left: 0;
  }

  .game-wrapper {
    width: min(100%, clamp(248px, calc(100svh - 430px), 320px));
    margin-inline: auto;
    padding: 12px;
    border-radius: 20px;
  }

  .score-burst {
    top: 10px;
    right: 10px;
  }

  .combo-indicator {
    top: 10px;
  }

  .merge-board {
    gap: 8px;
    padding: 10px;
  }

  .merge-cell {
    border-radius: 12px;
    font-size: clamp(0.94rem, 5.4vw, 1.28rem);
  }

  .overlay-menu {
    inset: 10px;
    padding: 16px 14px;
    border-radius: 18px;
    gap: 10px;
  }

  .overlay-menu h2 {
    font-size: 1.08rem;
    line-height: 1.08;
  }

  .overlay-menu p.small {
    font-size: 0.78rem;
    line-height: 1.4;
  }

  .result-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-bottom: 14px;
  }

  .result-box {
    padding: 10px;
    border-radius: 14px;
  }

  .result-box span {
    margin-bottom: 4px;
    font-size: 0.7rem;
  }

  .result-box strong {
    font-size: 1.06rem;
  }

  .mobile-controls {
    display: grid;
    grid-template-columns: repeat(3, 56px);
    gap: 8px;
    margin-top: 10px;
  }

  .control-btn {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    font-size: 1.15rem;
  }

  #mergeUpBtn {
    grid-column: 2;
    grid-row: 1;
  }

  #mergeLeftBtn {
    grid-column: 1;
    grid-row: 2;
  }

  #mergeDownBtn {
    grid-column: 2;
    grid-row: 2;
  }

  #mergeRightBtn {
    grid-column: 3;
    grid-row: 2;
  }

  .info-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 0;
  }

  .info-card {
    padding: 10px;
    border-radius: 16px;
  }

  .info-label {
    margin-bottom: 3px;
    font-size: 0.66rem;
  }

  .info-card strong {
    display: block;
    font-size: 0.74rem;
    line-height: 1.4;
  }

  .keyboard-hint {
    display: none;
  }
}

@media (max-width: 640px) {
  .game-shell {
    width: min(100%, 342px);
    gap: 8px;
  }

  .score-burst {
    font-size: 0.84rem;
  }

  .combo-indicator {
    width: calc(100% - 20px);
    text-align: center;
    font-size: 0.68rem;
  }

  .critical-copy {
    font-size: 0.84rem;
  }

  .critical-meta {
    font-size: 0.72rem;
  }

  .game-wrapper {
    width: min(100%, clamp(236px, calc(100svh - 410px), 306px));
  }

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

  .score-box,
  .utility-toggle {
    padding: 9px 10px;
  }

  .info-card strong {
    font-size: 0.7rem;
  }
}

@media (max-width: 390px) {
  #game-container {
    padding-inline: 10px;
  }

  .game-shell {
    width: min(100%, 328px);
  }

  .game-title {
    font-size: clamp(1.58rem, 8vw, 1.95rem);
  }

  .game-subtitle {
    font-size: 0.76rem;
    line-height: 1.48;
  }

  .game-wrapper {
    width: min(100%, clamp(228px, calc(100svh - 398px), 292px));
  }

  .merge-board {
    gap: 7px;
    padding: 9px;
  }

  .info-card {
    padding: 8px 9px;
  }

  .mobile-controls {
    grid-template-columns: repeat(3, 52px);
  }

  .control-btn {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    font-size: 1.02rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .merge-cell,
  .score-box,
  .score-value,
  .game-wrapper,
  .utility-toggle {
    transition: none;
  }

  .merge-cell.is-spawned,
  .merge-cell.is-merged,
  .score-box.is-boosted,
  .score-value.is-pop,
  .score-burst.is-visible,
  .combo-indicator.is-visible,
  .game-wrapper.has-combo-flare,
  .game-wrapper.is-critical,
  .merge-board.is-critical {
    animation-duration: 0.01ms;
    animation-iteration-count: 1;
  }
}