/* version 0.13 */

@import url(fonts/clear-sans.css);
html, body {
  margin: 0;
  padding: 0;
  background: #000000; /* Black background */
  color: #FF69B4; /* Bright pink text */
  font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
}

body {
  margin: 80px 0;
}

.heading:after {
  content: "";
  display: block;
  clear: both;
}

h1.title {
  font-size: 80px;
  font-weight: bold;
  margin: 0;
  display: block;
  float: left;
  color: #FF69B4; /* Pink title */
}

@-webkit-keyframes move-up {
  0% { top: 25px; opacity: 1; }
  100% { top: -50px; opacity: 0; }
}
@-moz-keyframes move-up {
  0% { top: 25px; opacity: 1; }
  100% { top: -50px; opacity: 0; }
}
@keyframes move-up {
  0% { top: 25px; opacity: 1; }
  100% { top: -50px; opacity: 0; }
}

.scores-container {
  float: right;
  text-align: right;
}

.score-container, .best-container {
  position: relative;
  display: inline-block;
  background: #FFF5F8; /* Nearly white with pink tint */
  padding: 15px 25px;
  font-size: 25px;
  height: 25px;
  line-height: 47px;
  font-weight: bold;
  border-radius: 3px;
  color: #FF69B4; /* Pink score text */
  margin-top: 8px;
  text-align: center;
}
.score-container:after, .best-container:after {
  position: absolute;
  width: 100%;
  top: 10px;
  left: 0;
  text-transform: uppercase;
  font-size: 13px;
  line-height: 13px;
  text-align: center;
  color: #FFB6C1; /* Light pink */
}
.score-container .score-addition, .best-container .score-addition {
  position: absolute;
  right: 30px;
  color: #FF69B4; /* Pink for score additions */
  font-size: 25px;
  line-height: 25px;
  font-weight: bold;
  z-index: 100;
  -webkit-animation: move-up 600ms ease-in;
  -moz-animation: move-up 600ms ease-in;
  animation: move-up 600ms ease-in;
  -webkit-animation-fill-mode: both;
  -moz-animation-fill-mode: both;
  animation-fill-mode: both;
}

.score-container:after { content: "Score"; }
.best-container:after { content: "Best"; }

p {
  margin-top: 0;
  margin-bottom: 10px;
  line-height: 1.65;
  color: #FF69B4; /* Pink for instructions */
}

a {
  color: #FF69B4; /* Pink links */
  font-weight: bold;
  text-decoration: underline;
  cursor: pointer;
}

strong.important {
  text-transform: uppercase;
}

hr {
  border: none;
  border-bottom: 1px solid #FF99CC; /* Subtle pink border */
  margin-top: 20px;
  margin-bottom: 30px;
}

.container {
  width: 500px;
  margin: 0 auto;
}

@-webkit-keyframes fade-in {
  0% { opacity: 0; }
  100% { opacity: 1; }
}
@-moz-keyframes fade-in {
  0% { opacity: 0; }
  100% { opacity: 1; }
}
@keyframes fade-in {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

.game-container {
  margin-top: 40px;
  position: relative;
  padding: 15px;
  cursor: default;
  -webkit-touch-callout: none;
  -ms-touch-callout: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -ms-touch-action: none;
  touch-action: none;
  background: #FFF5F8; /* Nearly white with pink tint */
  border-radius: 6px;
  width: 500px;
  height: 500px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
.game-container .game-message {
  display: none;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(255, 182, 193, 0.5); /* Light pink overlay */
  z-index: 100;
  text-align: center;
  -webkit-animation: fade-in 800ms ease 1200ms;
  -moz-animation: fade-in 800ms ease 1200ms;
  animation: fade-in 800ms ease 1200ms;
  -webkit-animation-fill-mode: both;
  -moz-animation-fill-mode: both;
  animation-fill-mode: both;
}
.game-container .game-message p {
  font-size: 60px;
  font-weight: bold;
  height: 60px;
  line-height: 60px;
  margin-top: 222px;
  color: #FF69B4; /* Pink for game messages */
}
.game-container .game-message .lower {
  display: block;
  margin-top: 59px;
}
.game-container .game-message a {
  display: inline-block;
  background: #FF3385; /* Darker pink button */
  border-radius: 3px;
  padding: 0 20px;
  text-decoration: none;
  color: #FFFFFF; /* White text for buttons */
  height: 40px;
  line-height: 42px;
  margin-left: 9px;
}
.game-container .game-message a.keep-playing-button {
  display: none;
}
.game-container .game-message.game-won {
  background: rgba(255, 105, 180, 0.5); /* Hot pink overlay */
  color: #FFFFFF; /* White for won message */
}
.game-container .game-message.game-won a.keep-playing-button {
  display: inline-block;
}
.game-container .game-message.game-won, .game-container .game-message.game-over {
  display: block;
}

.grid-container {
  position: absolute;
  z-index: 1;
}

.grid-row {
  margin-bottom: 15px;
}
.grid-row:last-child { margin-bottom: 0; }
.grid-row:after {
  content: "";
  display: block;
  clear: both;
}

.grid-cell {
  width: 106px; /* Whole pixels for exact alignment */
  height: 106px; /* Whole pixels for exact alignment */
  margin-right: 15px;
  float: left;
  border-radius: 3px;
  box-shadow: 0 0 1px rgba(255, 153, 204, 0.5); // Subtle pink shadow for separation (no border)
  background: #FFE4E9; /* Slightly darker pink */
}
.grid-cell:last-child { margin-right: 0; }

.tile-container {
  position: absolute;
  z-index: 2;
}

/* Tile glow behavior: Tiles of 128 and above glow with a pink shadow, increasing opacity with higher values. */
.tile, .tile .tile-inner {
  width: 106px; /* Match grid cell exactly */
  height: 106px; /* Match grid cell exactly */
  line-height: 106px; /* Center text vertically */
}
.tile.tile-position-1-1 { transform: translate(0px, 0px); }
.tile.tile-position-1-2 { transform: translate(0px, 121px); } /* Adjusted for whole pixel spacing */
.tile.tile-position-1-3 { transform: translate(0px, 242px); }  /* Adjusted for whole pixel spacing */
.tile.tile-position-1-4 { transform: translate(0px, 363px); } /* Adjusted for whole pixel spacing */
.tile.tile-position-2-1 { transform: translate(121px, 0px); }  /* Adjusted for whole pixel spacing */
.tile.tile-position-2-2 { transform: translate(121px, 121px); }
.tile.tile-position-2-3 { transform: translate(121px, 242px); }
.tile.tile-position-2-4 { transform: translate(121px, 363px); }
.tile.tile-position-3-1 { transform: translate(242px, 0px); }
.tile.tile-position-3-2 { transform: translate(242px, 121px); }
.tile.tile-position-3-3 { transform: translate(242px, 242px); }
.tile.tile-position-3-4 { transform: translate(242px, 363px); }
.tile.tile-position-4-1 { transform: translate(363px, 0px); }
.tile.tile-position-4-2 { transform: translate(363px, 121px); }
.tile.tile-position-4-3 { transform: translate(363px, 242px); }
.tile.tile-position-4-4 { transform: translate(363px, 363px); }

.tile {
  position: absolute;
  -webkit-transition: 100ms ease-in-out;
  -moz-transition: 100ms ease-in-out;
  transition: 100ms ease-in-out;
  -webkit-transition-property: -webkit-transform;
  -moz-transition-property: -moz-transform;
  transition-property: transform;
}
.tile .tile-inner {
  border-radius: 3px;
  background: #FFB6C1; /* Light pink base */
  text-align: center;
  font-weight: bold;
  z-index: 10;
  font-size: 55px;
}
.tile.tile-2 .tile-inner {
  background: #FFB6C1;
  color: #FFFFFF; /* White text for 2 */
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0), inset 0 0 0 1px rgba(255, 255, 255, 0);
}
.tile.tile-4 .tile-inner {
  background: #FFB3CC;
  color: #FFFFFF; /* White text for 4 */
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0), inset 0 0 0 1px rgba(255, 255, 255, 0);
}
.tile.tile-8 .tile-inner {
  color: #FFFFFF;
  background: #FF99CC;
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0), inset 0 0 0 1px rgba(255, 255, 255, 0);
}
.tile.tile-16 .tile-inner {
  color: #FFFFFF;
  background: #FF85A2;
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0), inset 0 0 0 1px rgba(255, 255, 255, 0);
}
.tile.tile-32 .tile-inner {
  color: #FFFFFF;
  background: #FF6699;
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0), inset 0 0 0 1px rgba(255, 255, 255, 0);
}
.tile.tile-64 .tile-inner {
  color: #FFFFFF;
  background: #FF3385;
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0), inset 0 0 0 1px rgba(255, 255, 255, 0);
}
.tile.tile-128 .tile-inner {
  color: #FFFFFF;
  background: #FF1493;
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0.5), inset 0 0 0 1px rgba(255, 255, 255, 0.14286); // Glow starts here
  font-size: 45px;
}
@media screen and (max-width: 520px) {
  .tile.tile-128 .tile-inner { font-size: 25px; }
}
.tile.tile-256 .tile-inner {
  color: #FFFFFF;
  background: #FF00FF;
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0.5), inset 0 0 0 1px rgba(255, 255, 255, 0.19048);
  font-size: 45px;
}
@media screen and (max-width: 520px) {
  .tile.tile-256 .tile-inner { font-size: 25px; }
}
.tile.tile-512 .tile-inner {
  color: #FFFFFF;
  background: #EE00EE;
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0.5), inset 0 0 0 1px rgba(255, 255, 255, 0.2381);
  font-size: 45px;
}
@media screen and (max-width: 520px) {
  .tile.tile-512 .tile-inner { font-size: 25px; }
}
.tile.tile-1024 .tile-inner {
  color: #FFFFFF;
  background: #DD00DD;
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0.5), inset 0 0 0 1px rgba(255, 255, 255, 0.28571);
  font-size: 35px;
}
@media screen and (max-width: 520px) {
  .tile.tile-1024 .tile-inner { font-size: 20px; }
}
.tile.tile-2048 .tile-inner {
  color: #FFFFFF;
  background: #C71585;
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0.5), inset 0 0 0 1px rgba(255, 255, 255, 0.33333);
  font-size: 35px;
}
@media screen and (max-width: 520px) {
  .tile.tile-2048 .tile-inner { font-size: 20px; }
}
.tile.tile-super .tile-inner {
  color: #FFFFFF;
  background: #800080; /* Very dark pink/purple */
  box-shadow: 0 0 30px 10px rgba(255, 105, 180, 0.5), inset 0 0 0 1px rgba(255, 255, 255, 0.25);
  font-size: 30px;
}
@media screen and (max-width: 520px) {
  .tile.tile-super .tile-inner { font-size: 15px; }
}

@-webkit-keyframes appear {
  0% { opacity: 0; transform: scale(0); }
  50% { transform: scale(1.1); } /* Bounce effect */
  100% { opacity: 1; transform: scale(1); }
}
@-moz-keyframes appear {
  0% { opacity: 0; transform: scale(0); }
  50% { transform: scale(1.1); }
  100% { opacity: 1; transform: scale(1); }
}
@keyframes appear {
  0% { opacity: 0; transform: scale(0); }
  50% { transform: scale(1.1); }
  100% { opacity: 1; transform: scale(1); }
}
.tile-new .tile-inner {
  -webkit-animation: appear 200ms ease-out 100ms;
  -moz-animation: appear 200ms ease-out 100ms;
  animation: appear 200ms ease-out 100ms;
  -webkit-animation-fill-mode: backwards;
  -moz-animation-fill-mode: backwards;
  animation-fill-mode: backwards;
}

@-webkit-keyframes pop {
  0% { transform: scale(0); }
  50% { transform: scale(1.1); } /* Bounce effect */
  100% { transform: scale(1); }
}
@-moz-keyframes pop {
  0% { transform: scale(0); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}
@keyframes pop {
  0% { transform: scale(0); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}
.tile-merged .tile-inner {
  z-index: 20;
  -webkit-animation: pop 200ms ease-out 100ms;
  -moz-animation: pop 200ms ease-out 100ms;
  animation: pop 200ms ease-out 100ms;
  -webkit-animation-fill-mode: backwards;
  -moz-animation-fill-mode: backwards;
  animation-fill-mode: backwards;
}

.above-game:after {
  content: "";
  display: block;
  clear: both;
}

.game-intro {
  float: left;
  line-height: 42px;
  margin-bottom: 0;
  color: #FF69B4; /* Pink for intro text */
}

.restart-button {
  display: inline-block;
  background: #FF3385; /* Darker pink button */
  border-radius: 3px;
  padding: 0 20px;
  text-decoration: none;
  color: #FFFFFF; /* White text for buttons */
  height: 40px;
  line-height: 42px;
  display: block;
  text-align: center;
  float: right;
}

.game-explanation {
  margin-top: 50px;
  color: #FF69B4; /* Pink for explanation */
}

@media screen and (max-width: 520px) {
  html, body { font-size: 15px; }
  body { margin: 20px 0; padding: 0 20px; }
  h1.title { font-size: 27px; margin-top: 15px; color: #FF69B4; } /* Pink title on mobile */
  .container { width: 280px; margin: 0 auto; }
  .score-container, .best-container { margin-top: 0; padding: 15px 10px; min-width: 40px; color: #FF69B4; } /* Pink score on mobile */
  .heading { margin-bottom: 10px; }
  .game-intro { width: 55%; display: block; box-sizing: border-box; line-height: 1.65; color: #FF69B4; } /* Pink intro on mobile */
  .restart-button { width: 42%; padding: 0; display: block; box-sizing: border-box; margin-top: 2px; }
  .game-container {
    margin-top: 17px;
    position: relative;
    padding: 10px;
    cursor: default;
    -webkit-touch-callout: none;
    -ms-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -ms-touch-action: none;
    touch-action: none;
    background: #FFF5F8;
    border-radius: 6px;
    width: 280px;
    height: 280px;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
  }
  .game-container .game-message {
    display: none;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(255, 182, 193, 0.5);
    z-index: 100;
    text-align: center;
    -webkit-animation: fade-in 800ms ease 1200ms;
    -moz-animation: fade-in 800ms ease 1200ms;
    animation: fade-in 800ms ease 1200ms;
    -webkit-animation-fill-mode: both;
    -moz-animation-fill-mode: both;
    animation-fill-mode: both;
  }
  .game-container .game-message p {
    font-size: 25px !important; /* Adjusted for mobile */
    font-weight: bold;
    height: 25px !important;
    line-height: 25px !important;
    margin-top: 90px !important;
    color: #FF69B4 !important; /* Pink for mobile messages */
  }
  .game-container .game-message .lower {
    display: block;
    margin-top: 25px !important;
  }
  .game-container .game-message a {
    display: inline-block;
    background: #FF3385;
    border-radius: 3px;
    padding: 0 20px;
    text-decoration: none;
    color: #FFFFFF;
    height: 40px;
    line-height: 42px;
    margin-left: 9px;
  }
  .game-container .game-message a.keep-playing-button {
    display: none;
  }
  .game-container .game-message.game-won {
    background: rgba(255, 105, 180, 0.5);
    color: #FFFFFF;
  }
  .game-container .game-message.game-won a.keep-playing-button {
    display: inline-block;
  }
  .game-container .game-message.game-won, .game-container .game-message.game-over {
    display: block;
  }

  .grid-container { position: absolute; z-index: 1; }
  .grid-row { margin-bottom: 10px; }
  .grid-row:last-child { margin-bottom: 0; }
  .grid-row:after { content: ""; display: block; clear: both; }
  .grid-cell {
    width: 58px; /* Whole pixels for exact alignment */
    height: 58px; /* Whole pixels for exact alignment */
    margin-right: 10px;
    float: left;
    border-radius: 3px;
    box-shadow: 0 0 1px rgba(255, 153, 204, 0.5); // Subtle pink shadow for separation (no border)
    background: #FFE4E9;
  }
  .grid-cell:last-child { margin-right: 0; }

  .tile-container { position: absolute; z-index: 2; }
  .tile, .tile .tile-inner { width: 58px; height: 58px; line-height: 58px; } /* Match grid cell exactly */
  .tile.tile-position-1-1 { transform: translate(0px, 0px); }
  .tile.tile-position-1-2 { transform: translate(0px, 68px); } /* Adjusted for whole pixel spacing */
  .tile.tile-position-1-3 { transform: translate(0px, 136px); }  /* Adjusted for whole pixel spacing */
  .tile.tile-position-1-4 { transform: translate(0px, 204px); } /* Adjusted for whole pixel spacing */
  .tile.tile-position-2-1 { transform: translate(68px, 0px); }  /* Adjusted for whole pixel spacing */
  .tile.tile-position-2-2 { transform: translate(68px, 68px); }
  .tile.tile-position-2-3 { transform: translate(68px, 136px); }
  .tile.tile-position-2-4 { transform: translate(68px, 204px); }
  .tile.tile-position-3-1 { transform: translate(136px, 0px); }
  .tile.tile-position-3-2 { transform: translate(136px, 68px); }
  .tile.tile-position-3-3 { transform: translate(136px, 136px); }
  .tile.tile-position-3-4 { transform: translate(136px, 204px); }
  .tile.tile-position-4-1 { transform: translate(204px, 0px); }
  .tile.tile-position-4-2 { transform: translate(204px, 68px); }
  .tile.tile-position-4-3 { transform: translate(204px, 136px); }
  .tile.tile-position-4-4 { transform: translate(204px, 204px); }

  .tile .tile-inner { font-size: 30px; } /* Slightly larger for mobile readability */
  .game-message p { font-size: 25px !important; height: 25px !important; line-height: 25px !important; margin-top: 90px !important; }
  .game-message .lower { margin-top: 25px !important; }
}