/* ==========================================================================
   2048 KANTO EMPIRE — BESPOKE EARTH-TONE DESIGN SYSTEM
   Palette: Mahogany (#4D342D), Moss (#6A6A53), Olive (#9B9879),
            Linen (#DDCCB7), Egg Shell (#EDE7DB)
   ========================================================================== */

:root {
  /* Kanto Reference Palette */
  --kanto-mahogany: #4D342D;
  --kanto-moss: #6A6A53;
  --kanto-olive: #9B9879;
  --kanto-linen: #DDCCB7;
  --kanto-eggshell: #EDE7DB;

  /* Dimensions & Spacing */
  --board-max-size: 460px;
  --board-padding: 12px;
  --cell-gap: 12px;
  --cell-radius: 6px;
  --board-radius: 10px;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono-stack: "SF Mono", "Roboto Mono", Menlo, Consolas, monospace;

  /* Night Atmosphere (Default & Automatic) */
  --bg-primary: #1C1513;
  --bg-surface: #271C19;
  --bg-board: #4D342D;
  --bg-cell-empty: #382520;
  --text-main: #EDE7DB;
  --text-muted: #DDCCB7;
  --text-dark: #1C1513;
  --border-subtle: #45312B;
  --btn-bg: #2D201C;
  --btn-border: #4A352F;
  --btn-hover: #3A2A25;
  --btn-active: #231815;
  --accent-score: #9B9879;
  --accent-glow: rgba(155, 152, 121, 0.25);

  /* Tile Progression (Artisanal Kanto Earth Tones) */
  --tile-2-bg: #EDE7DB;       /* Egg Shell */
  --tile-2-text: #4D342D;     /* Mahogany */
  --tile-4-bg: #DDCCB7;       /* Linen */
  --tile-4-text: #4D342D;     /* Mahogany */
  --tile-8-bg: #9B9879;       /* Olive */
  --tile-8-text: #EDE7DB;     /* Egg Shell */
  --tile-16-bg: #6A6A53;      /* Moss */
  --tile-16-text: #EDE7DB;    /* Egg Shell */
  --tile-32-bg: #4D342D;      /* Mahogany */
  --tile-32-text: #EDE7DB;    /* Egg Shell */
  --tile-64-bg: #7D4133;      /* Warm Terracotta Mahogany */
  --tile-64-text: #EDE7DB;
  --tile-128-bg: #A85B3F;     /* Deep Terracotta */
  --tile-128-text: #EDE7DB;
  --tile-256-bg: #BFA067;     /* Warm Linen Gold */
  --tile-256-text: #1C1513;
  --tile-512-bg: #B08B48;     /* Rich Harvest Gold */
  --tile-512-text: #1C1513;
  --tile-1024-bg: #859356;    /* Vibrant Forest Olive */
  --tile-1024-text: #EDE7DB;
  --tile-2048-bg: #E0C068;    /* Kanto Imperial Gold */
  --tile-2048-text: #1C1513;
  --tile-super-bg: #38241D;
  --tile-super-text: #E0C068;
}

/* ==========================================================================
   RESET & FOUNDATIONS
   ========================================================================== */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100dvh;
  max-height: 100dvh;
  overflow: hidden;
  position: fixed;
  top: 0;
  left: 0;
  font-family: var(--font-stack);
  background-color: var(--bg-primary);
  color: var(--text-main);
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  overscroll-behavior: none;
  overscroll-behavior-y: none;
  -webkit-tap-highlight-color: transparent;
}

.app-wrapper {
  max-width: 500px;
  height: 100dvh;
  max-height: 100dvh;
  margin: 0 auto;
  padding: env(safe-area-inset-top, 14px) 16px env(safe-area-inset-bottom, 16px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-sizing: border-box;
  overflow: hidden;
}

/* ==========================================================================
   HEADER & SCORE MODULE
   ========================================================================== */

.app-header {
  margin-bottom: 12px;
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.branding {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo {
  font-size: 3rem;
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -1.5px;
  color: var(--text-main);
}

.badge {
  font-family: var(--mono-stack);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--kanto-olive);
  text-transform: uppercase;
}

.scores-group {
  display: flex;
  gap: 6px;
}

.score-card {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  min-width: 64px;
  padding: 5px 8px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.score-card .label {
  display: block;
  font-family: var(--mono-stack);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: var(--text-muted);
}

.score-card .value {
  display: block;
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

/* Floating Score Bubble */
.floating-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.score-popup {
  position: absolute;
  left: 50%;
  top: 2px;
  transform: translateX(-50%);
  font-family: var(--mono-stack);
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--kanto-olive);
  animation: float-score 700ms cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  white-space: nowrap;
}

@keyframes float-score {
  0% {
    opacity: 1;
    transform: translate(-50%, 0) scale(0.9);
  }
  60% {
    opacity: 0.9;
    transform: translate(-50%, -24px) scale(1.1);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -36px) scale(1);
  }
}

/* ==========================================================================
   TOOLBAR & BUTTONS
   ========================================================================== */

.controls-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 8px;
}

.toolbar-left .subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.35;
  letter-spacing: 0.2px;
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-tactile {
  background-color: var(--btn-bg);
  border: 1px solid var(--btn-border);
  color: var(--text-main);
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: background-color 100ms ease, border-color 100ms ease, transform 60ms ease, box-shadow 100ms ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.btn-tactile:hover:not(:disabled) {
  background-color: var(--btn-hover);
  border-color: var(--kanto-olive);
}

.btn-tactile:active:not(:disabled) {
  background-color: var(--btn-active);
  transform: translateY(1px);
  box-shadow: none;
}

.icon-btn {
  width: 38px;
  height: 38px;
}

.text-btn {
  height: 38px;
  padding: 0 14px;
  font-family: var(--mono-stack);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.8px;
}

.install-app-btn {
  height: 38px;
  padding: 0 10px;
  gap: 5px;
  font-family: var(--mono-stack);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.8px;
  background-color: var(--kanto-olive);
  color: var(--text-dark);
  border-color: var(--kanto-olive);
}

.install-app-btn:hover {
  background-color: var(--kanto-linen);
  color: var(--kanto-mahogany);
}

.ios-install-panel {
  max-width: 310px;
}

.ios-install-steps {
  text-align: left;
  margin: 10px auto 16px;
  padding-left: 20px;
  font-size: 0.84rem;
  color: var(--text-main);
  line-height: 1.6;
}

.ios-install-steps li {
  margin-bottom: 6px;
}

.hidden {
  display: none !important;
}

/* ==========================================================================
   STATUS INDICATOR & GAUGE
   ========================================================================== */

.status-indicator-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  height: 24px;
}

.combo-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  animation: combo-pulse 500ms ease infinite alternate;
}

.combo-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--kanto-olive);
}

.combo-text {
  font-family: var(--mono-stack);
  font-size: 0.68rem;
  font-weight: 800;
  color: var(--kanto-olive);
  letter-spacing: 0.6px;
}

@keyframes combo-pulse {
  from { transform: scale(0.96); }
  to { transform: scale(1.04); }
}

.resonance-gauge {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.gauge-label {
  font-family: var(--mono-stack);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.meter-bar {
  width: 80px;
  height: 6px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  background-color: var(--kanto-olive);
  transition: width 250ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ==========================================================================
   GAME BOARD VIEWPORT & HARDWARE ANIMATED TILES
   ========================================================================== */

.board-viewport {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex: 1;
  min-height: 0;
  outline: none;
}

.board-frame {
  position: relative;
  width: 100%;
  max-width: min(var(--board-max-size), calc(100dvh - 270px));
  aspect-ratio: 1 / 1;
  background-color: var(--bg-board);
  border: 1px solid var(--border-subtle);
  border-radius: var(--board-radius);
  padding: var(--board-padding);
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.3), 0 4px 14px rgba(0, 0, 0, 0.2);
  touch-action: none;
  cursor: grab;
  outline: none;
}

.board-frame:active {
  cursor: grabbing;
}

/* Static Grid Slots */
.grid-layer {
  display: grid;
  grid-template-rows: repeat(4, 1fr);
  gap: var(--cell-gap);
  width: 100%;
  height: 100%;
}

.grid-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--cell-gap);
}

.grid-cell {
  background-color: var(--bg-cell-empty);
  border-radius: var(--cell-radius);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* Dynamic Active Tiles Layer */
.tile-layer {
  position: absolute;
  top: var(--board-padding);
  left: var(--board-padding);
  right: var(--board-padding);
  bottom: var(--board-padding);
  pointer-events: none;
}

.tile {
  position: absolute;
  width: calc((100% - 3 * var(--cell-gap)) / 4);
  height: calc((100% - 3 * var(--cell-gap)) / 4);
  border-radius: var(--cell-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 2.2rem;
  letter-spacing: -0.5px;
  line-height: 1;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  will-change: transform;
  transform: translate3d(calc(var(--col-idx, 0) * (100% + var(--cell-gap))), calc(var(--row-idx, 0) * (100% + var(--cell-gap))), 0);
  transition: transform 120ms cubic-bezier(0.25, 1, 0.5, 1);
  user-select: none;
}

/* Hardware Transform Coordinates */
.tile[data-col="0"] { --col-idx: 0; }
.tile[data-col="1"] { --col-idx: 1; }
.tile[data-col="2"] { --col-idx: 2; }
.tile[data-col="3"] { --col-idx: 3; }

.tile[data-row="0"] { --row-idx: 0; }
.tile[data-row="1"] { --row-idx: 1; }
.tile[data-row="2"] { --row-idx: 2; }
.tile[data-row="3"] { --row-idx: 3; }

/* Tile Inner Container for Keyframe Scaling */
.tile-inner {
  width: 100%;
  height: 100%;
  border-radius: var(--cell-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--tile-2-bg);
  color: var(--tile-2-text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Animations */
.tile.tile-spawn .tile-inner {
  animation: tile-appear 150ms cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.tile.tile-merged .tile-inner {
  animation: tile-pop 200ms cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes tile-appear {
  0% {
    opacity: 0;
    transform: scale(0.2);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes tile-pop {
  0% {
    transform: scale(0.85);
  }
  50% {
    transform: scale(1.15);
  }
  100% {
    transform: scale(1);
  }
}

/* Tile Values & Typographic Scaling */
.tile-val-2 .tile-inner    { background-color: var(--tile-2-bg); color: var(--tile-2-text); }
.tile-val-4 .tile-inner    { background-color: var(--tile-4-bg); color: var(--tile-4-text); }
.tile-val-8 .tile-inner    { background-color: var(--tile-8-bg); color: var(--tile-8-text); }
.tile-val-16 .tile-inner   { background-color: var(--tile-16-bg); color: var(--tile-16-text); font-size: 2rem; }
.tile-val-32 .tile-inner   { background-color: var(--tile-32-bg); color: var(--tile-32-text); font-size: 2rem; border: 1px solid var(--kanto-moss); }
.tile-val-64 .tile-inner   { background-color: var(--tile-64-bg); color: var(--tile-64-text); font-size: 2rem; }
.tile-val-128 .tile-inner  { background-color: var(--tile-128-bg); color: var(--tile-128-text); font-size: 1.7rem; }
.tile-val-256 .tile-inner  { background-color: var(--tile-256-bg); color: var(--tile-256-text); font-size: 1.7rem; box-shadow: 0 0 10px rgba(191, 160, 103, 0.3); }
.tile-val-512 .tile-inner  { background-color: var(--tile-512-bg); color: var(--tile-512-text); font-size: 1.7rem; box-shadow: 0 0 14px rgba(176, 139, 72, 0.35); }
.tile-val-1024 .tile-inner { background-color: var(--tile-1024-bg); color: var(--tile-1024-text); font-size: 1.35rem; box-shadow: 0 0 18px rgba(133, 147, 86, 0.4); }
.tile-val-2048 .tile-inner { background-color: var(--tile-2048-bg); color: var(--tile-2048-text); font-size: 1.35rem; box-shadow: 0 0 24px rgba(224, 192, 104, 0.5); }
.tile-val-super .tile-inner{ background-color: var(--tile-super-bg); color: var(--tile-super-text); font-size: 1.2rem; border: 2px solid var(--kanto-olive); }

/* ==========================================================================
   OVERLAY DIALOG (GAME OVER / WIN) — IMAGE 1 REFERENCE DESIGN
   ========================================================================== */

.overlay-modal {
  position: fixed;
  inset: 0;
  background-color: rgba(28, 21, 19, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 9999;
  animation: overlay-fade-in 200ms ease forwards;
  pointer-events: auto;
  cursor: default;
}

.overlay-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 24px 20px 20px;
  width: 100%;
  max-width: 330px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
  animation: panel-pop-in 220ms cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
  position: relative;
  z-index: 10000;
  pointer-events: auto;
  box-sizing: border-box;
}

@keyframes overlay-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.kanto-game-over-panel {
  text-align: center;
  padding: 24px 20px 18px;
  max-width: 320px;
}

@keyframes panel-pop-in {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.overlay-heading {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 6px;
  color: var(--text-main);
}

.overlay-body {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 12px;
}

.overlay-body span {
  font-weight: 700;
  color: var(--text-main);
}

/* Mini 4x4 Board Snapshot Preview */
.mini-board-snapshot {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: 4px;
  width: 140px;
  height: 140px;
  margin: 0 auto 18px;
  background-color: var(--kanto-mahogany);
  padding: 5px;
  border-radius: 6px;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.4), 0 3px 10px rgba(0, 0, 0, 0.2);
}

.mini-tile {
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 800;
  line-height: 1;
  background-color: var(--bg-cell-empty);
  color: var(--text-muted);
}

.mini-tile.mini-val-2    { background-color: var(--tile-2-bg); color: var(--tile-2-text); }
.mini-tile.mini-val-4    { background-color: var(--tile-4-bg); color: var(--tile-4-text); }
.mini-tile.mini-val-8    { background-color: var(--tile-8-bg); color: var(--tile-8-text); }
.mini-tile.mini-val-16   { background-color: var(--tile-16-bg); color: var(--tile-16-text); font-size: 0.58rem; }
.mini-tile.mini-val-32   { background-color: var(--tile-32-bg); color: var(--tile-32-text); font-size: 0.58rem; }
.mini-tile.mini-val-64   { background-color: var(--tile-64-bg); color: var(--tile-64-text); font-size: 0.58rem; }
.mini-tile.mini-val-128  { background-color: var(--tile-128-bg); color: var(--tile-128-text); font-size: 0.52rem; }
.mini-tile.mini-val-256  { background-color: var(--tile-256-bg); color: var(--tile-256-text); font-size: 0.52rem; }
.mini-tile.mini-val-512  { background-color: var(--tile-512-bg); color: var(--tile-512-text); font-size: 0.52rem; }
.mini-tile.mini-val-1024 { background-color: var(--tile-1024-bg); color: var(--tile-1024-text); font-size: 0.44rem; }
.mini-tile.mini-val-2048 { background-color: var(--tile-2048-bg); color: var(--tile-2048-text); font-size: 0.44rem; }
.mini-tile.mini-val-super{ background-color: var(--tile-super-bg); color: var(--tile-super-text); font-size: 0.42rem; }

.overlay-buttons {
  display: flex;
  flex-direction: column;
  gap: 8px;
  justify-content: center;
  margin-bottom: 14px;
}

.overlay-btn {
  width: 100%;
}

.play-again-btn {
  background-color: var(--kanto-olive);
  color: var(--text-dark);
  border-color: var(--kanto-olive);
  font-family: var(--font-stack);
  font-size: 0.95rem;
  font-weight: 700;
  height: 42px;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.play-again-btn:hover:not(:disabled) {
  background-color: var(--kanto-linen);
  border-color: var(--kanto-linen);
  color: var(--kanto-mahogany);
}

.overlay-footer-credit {
  font-size: 0.68rem;
  color: var(--text-muted);
  opacity: 0.8;
  letter-spacing: 0.3px;
}

/* ==========================================================================
   FOOTER (STREAMLINED MOVEMENT CONTROLS ONLY)
   ========================================================================== */

.app-footer {
  margin-top: 18px;
  text-align: center;
}

.shortcut-tags {
  display: flex;
  justify-content: center;
  margin-bottom: 8px;
}

.tag {
  font-size: 0.74rem;
  color: var(--text-muted);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 5px 12px;
  border-radius: 6px;
}

kbd {
  font-family: var(--mono-stack);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 5px;
  background-color: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: 4px;
  color: var(--text-main);
  margin: 0 1px;
}

.credit-line {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.4px;
}

/* ==========================================================================
   SETTINGS MENU & PRIVACY POLICY MODALS
   ========================================================================== */

.menu-dialog-panel {
  max-width: 320px;
  text-align: left;
}

.menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.close-modal-btn {
  width: 32px;
  height: 32px;
}

.menu-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.menu-item-row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 12px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease;
}

.menu-item-row:hover {
  background-color: var(--btn-hover);
  border-color: var(--kanto-olive);
}

.menu-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 6px;
  background-color: var(--bg-surface);
  color: var(--kanto-olive);
  flex-shrink: 0;
}

.menu-item-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.menu-item-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
}

.menu-item-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.privacy-dialog-panel {
  max-width: 330px;
  text-align: left;
}

.privacy-content {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
}

.privacy-content p {
  color: var(--text-main);
  margin-bottom: 10px;
}

.privacy-bullet-list {
  padding-left: 18px;
  margin-bottom: 8px;
}

.privacy-bullet-list li {
  margin-bottom: 8px;
}

.privacy-bullet-list li strong {
  color: var(--text-main);
}

/* Mobile Screens Adjustments */
@media (max-width: 440px) {
  .app-wrapper {
    padding: 12px 10px 18px;
  }
  .logo {
    font-size: 2.4rem;
  }
  .scores-group {
    gap: 4px;
  }
  .score-card {
    min-width: 52px;
    padding: 3px 5px;
  }
  .score-card .label {
    font-size: 0.54rem;
  }
  .score-card .value {
    font-size: 0.95rem;
  }
  :root {
    --board-padding: 8px;
    --cell-gap: 8px;
  }
  .tile {
    font-size: 1.8rem;
  }
  .tile-val-16 .tile-inner,
  .tile-val-32 .tile-inner,
  .tile-val-64 .tile-inner {
    font-size: 1.6rem;
  }
  .tile-val-128 .tile-inner,
  .tile-val-256 .tile-inner,
  .tile-val-512 .tile-inner {
    font-size: 1.35rem;
  }
  .tile-val-1024 .tile-inner,
  .tile-val-2048 .tile-inner {
    font-size: 1.15rem;
  }
}