update screenshot in README
update screenshot in README

file:a/README.md -> file:b/README.md
# 2048 # 2048
A small clone of [1024](https://play.google.com/store/apps/details?id=com.veewo.a1024), based on [Saming's 2048](saming.fr/p/2048/) (also a clone). A small clone of [1024](https://play.google.com/store/apps/details?id=com.veewo.a1024), based on [Saming's 2048](saming.fr/p/2048/) (also a clone).
   
Made just for fun. Made just for fun.
   
[![Screenshot](http://pictures.gabrielecirulli.com/2048-20140305-170629.png)](http://pictures.gabrielecirulli.com/2048-20140305-170629.png) [![Screenshot](http://pictures.gabrielecirulli.com/2048-20140305-231246.png)](http://pictures.gabrielecirulli.com/2048-20140305-231246.png)
   
file:a/index.html -> file:b/index.html
<!DOCTYPE html> <!DOCTYPE html>
<html> <html>
<head> <head>
<meta charset="utf-8"> <meta charset="utf-8">
<title>2048</title> <title>2048</title>
   
<link href="style/main.css" rel="stylesheet" type="text/css"> <link href="style/main.css" rel="stylesheet" type="text/css">
</head> </head>
<body> <body>
<div class="container"> <div class="container">
<h1>2048</h1> <h1>2048</h1>
  <p class="game-intro">Join the numbers and get to the <strong>2048 tile!</strong></p>
   
<div class="game-container"> <div class="game-container">
<div class="grid-container"> <div class="grid-container">
<div class="grid-row"> <div class="grid-row">
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
</div> </div>
<div class="grid-row"> <div class="grid-row">
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
</div> </div>
<div class="grid-row"> <div class="grid-row">
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
</div> </div>
<div class="grid-row"> <div class="grid-row">
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
<div class="grid-cell"></div> <div class="grid-cell"></div>
</div> </div>
</div> </div>
   
<div class="tile-container"> <div class="tile-container">
<div class="tile tile-2 tile-position-1-1"> <div class="tile tile-2 tile-position-1-1">
2 2
</div> </div>
<div class="tile tile-4 tile-position-2-1"> <div class="tile tile-4 tile-position-2-3">
4 4
</div> </div>
<div class="tile tile-8 tile-position-3-1"> <div class="tile tile-512 tile-position-3-2">
8 512
</div> </div>
<div class="tile tile-16 tile-position-4-1"> <div class="tile tile-2048 tile-position-4-4">
16 2048
</div> </div>
<div class="tile tile-32 tile-position-1-2">  
32  
</div>  
<div class="tile tile-64 tile-position-2-2">  
64  
</div>  
<div class="tile tile-128 tile-position-3-2">  
128  
</div>  
<div class="tile tile-256 tile-position-4-2">  
256  
</div>  
<div class="tile tile-512 tile-position-1-3">  
512  
</div>  
<div class="tile tile-1024 tile-position-2-3">  
1024  
</div>  
<div class="tile tile-2048 tile-position-3-3">  
2048  
</div>  
</div> </div>
</div> </div>
   
  <p class="game-explanation">
  <strong class="important">How to play:</strong> Use your <strong>arrow keys</strong> to move the tiles. When two tiles with the same number touch, they <strong>merge into one!</strong>
  </p>
  <hr>
  <p>
  Created by <a href="http://gabrielecirulli.com" target="_blank">Gabriele Cirulli.</a> Based on <a href="https://itunes.apple.com/us/app/1024!/id823499224" target="_blank">1024 by Veewo Studio.</a>
  </p>
</div> </div>
</body> </body>
</html> </html>
   
@import url(fonts/clear-sans.css); @import url(fonts/clear-sans.css);
html, body { html, body {
margin: 0; margin: 0;
padding: 0; padding: 0;
background: #faf8ef; background: #faf8ef;
color: #776e65; color: #776e65;
font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif; } font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 18px; }
   
body { body {
margin: 80px 0; } margin: 80px 0; }
   
h1 { h1 {
font-size: 80px; font-size: 80px;
font-weight: bold; font-weight: bold;
margin: 0; } margin: 0; }
   
  p {
  margin-top: 0;
  margin-bottom: 10px;
  line-height: 1.65; }
   
  a {
  color: #776e65;
  font-weight: bold;
  text-decoration: underline; }
   
  strong.important {
  text-transform: uppercase; }
   
  hr {
  border: none;
  border-bottom: 1px solid #d8d4d0;
  margin-top: 20px;
  margin-bottom: 30px; }
   
.container { .container {
width: 500px; width: 500px;
margin: 0 auto; } margin: 0 auto; }
   
.game-container { .game-container {
margin-top: 50px; margin-top: 40px;
position: relative; position: relative;
padding: 15px; padding: 15px;
cursor: default; cursor: default;
-webkit-touch-callout: none; -webkit-touch-callout: none;
-webkit-user-select: none; -webkit-user-select: none;
-moz-user-select: none; -moz-user-select: none;
background: #bbada0; background: #bbada0;
border-radius: 6px; border-radius: 6px;
width: 500px; width: 500px;
height: 500px; height: 500px;
box-sizing: border-box; } box-sizing: border-box; }
   
.grid-container { .grid-container {
position: absolute; position: absolute;
z-index: 1; } z-index: 1; }
   
.grid-row { .grid-row {
margin-bottom: 15px; } margin-bottom: 15px; }
.grid-row:last-child { .grid-row:last-child {
margin-bottom: 0; } margin-bottom: 0; }
.grid-row:after { .grid-row:after {
content: ""; content: "";
display: block; display: block;
clear: both; } clear: both; }
   
.grid-cell { .grid-cell {
width: 106.25px; width: 106.25px;
height: 106.25px; height: 106.25px;
margin-right: 15px; margin-right: 15px;
float: left; float: left;
border-radius: 3px; border-radius: 3px;
background: rgba(238, 228, 218, 0.35); } background: rgba(238, 228, 218, 0.35); }
.grid-cell:last-child { .grid-cell:last-child {
margin-right: 0; } margin-right: 0; }
   
.tile-container { .tile-container {
position: absolute; position: absolute;
z-index: 2; } z-index: 2; }
   
.tile { .tile {
background: red; background: red;
width: 106.25px; width: 106.25px;
height: 106.25px; height: 106.25px;
border-radius: 3px; border-radius: 3px;
background: #eee4da; background: #eee4da;
text-align: center; text-align: center;
line-height: 116.25px; line-height: 116.25px;
font-size: 55px; font-size: 55px;
font-weight: bold; font-weight: bold;
-webkit-transition: 200ms ease; -webkit-transition: 200ms ease;
-moz-transition: 200ms ease; -moz-transition: 200ms ease;
-webkit-transition-property: top, left; -webkit-transition-property: top, left;
-moz-transition-property: top, left; } -moz-transition-property: top, left; }
.tile.tile-position-1-1 { .tile.tile-position-1-1 {
position: absolute; position: absolute;
left: 0px; left: 0px;
top: 0px; } top: 0px; }
.tile.tile-position-1-2 { .tile.tile-position-1-2 {
position: absolute; position: absolute;
left: 0px; left: 0px;
top: 121.25px; } top: 121.25px; }
.tile.tile-position-1-3 { .tile.tile-position-1-3 {
position: absolute; position: absolute;
left: 0px; left: 0px;
top: 242.5px; } top: 242.5px; }
.tile.tile-position-1-4 { .tile.tile-position-1-4 {
position: absolute; position: absolute;
left: 0px; left: 0px;
top: 363.75px; } top: 363.75px; }
.tile.tile-position-2-1 { .tile.tile-position-2-1 {
position: absolute; position: absolute;
left: 121.25px; left: 121.25px;
top: 0px; } top: 0px; }
.tile.tile-position-2-2 { .tile.tile-position-2-2 {
position: absolute; position: absolute;
left: 121.25px; left: 121.25px;
top: 121.25px; } top: 121.25px; }
.tile.tile-position-2-3 { .tile.tile-position-2-3 {
position: absolute; position: absolute;
left: 121.25px; left: 121.25px;
top: 242.5px; } top: 242.5px; }
.tile.tile-position-2-4 { .tile.tile-position-2-4 {
position: absolute; position: absolute;
left: 121.25px; left: 121.25px;
top: 363.75px; } top: 363.75px; }
.tile.tile-position-3-1 { .tile.tile-position-3-1 {
position: absolute; position: absolute;
left: 242.5px; left: 242.5px;
top: 0px; } top: 0px; }
.tile.tile-position-3-2 { .tile.tile-position-3-2 {
position: absolute; position: absolute;
left: 242.5px; left: 242.5px;
top: 121.25px; } top: 121.25px; }
.tile.tile-position-3-3 { .tile.tile-position-3-3 {
position: absolute; position: absolute;
left: 242.5px; left: 242.5px;
top: 242.5px; } top: 242.5px; }
.tile.tile-position-3-4 { .tile.tile-position-3-4 {
position: absolute; position: absolute;
left: 242.5px; left: 242.5px;
top: 363.75px; } top: 363.75px; }
.tile.tile-position-4-1 { .tile.tile-position-4-1 {
position: absolute; position: absolute;
left: 363.75px; left: 363.75px;
top: 0px; } top: 0px; }
.tile.tile-position-4-2 { .tile.tile-position-4-2 {
position: absolute; position: absolute;
left: 363.75px; left: 363.75px;
top: 121.25px; } top: 121.25px; }
.tile.tile-position-4-3 { .tile.tile-position-4-3 {
position: absolute; position: absolute;
left: 363.75px; left: 363.75px;
top: 242.5px; } top: 242.5px; }
.tile.tile-position-4-4 { .tile.tile-position-4-4 {
position: absolute; position: absolute;
left: 363.75px; left: 363.75px;
top: 363.75px; } top: 363.75px; }
.tile.tile-2 { .tile.tile-2 {
background: #eee4da; background: #eee4da;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0); } box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0); }
.tile.tile-4 { .tile.tile-4 {
background: #ede0c8; background: #ede0c8;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0); } box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0); }
.tile.tile-8 { .tile.tile-8 {
background: #edddb7; color: #f9f6f2;
  background: #f2b179;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0); } box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0); }
.tile.tile-16 { .tile.tile-16 {
background: #edd9a6; color: #f9f6f2;
  background: #f59563;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0); } box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0), inset 0 0 0 1px rgba(255, 255, 255, 0); }
.tile.tile-32 { .tile.tile-32 {
background: #edd695; color: #f9f6f2;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.09524), inset 0 0 0 1px rgba(255, 255, 255, 0.04762); } background: #f67c5f;
  box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.07937), inset 0 0 0 1px rgba(255, 255, 255, 0.04762); }
.tile.tile-64 { .tile.tile-64 {
background: #edd384; color: #f9f6f2;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.19048), inset 0 0 0 1px rgba(255, 255, 255, 0.09524); } background: #f65e3b;
  box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.15873), inset 0 0 0 1px rgba(255, 255, 255, 0.09524); }
.tile.tile-128 { .tile.tile-128 {
  color: #f9f6f2;
background: #edcf72; background: #edcf72;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.28571), inset 0 0 0 1px rgba(255, 255, 255, 0.14286); box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.2381), inset 0 0 0 1px rgba(255, 255, 255, 0.14286);
font-size: 45px; } font-size: 45px; }
.tile.tile-256 { .tile.tile-256 {
  color: #f9f6f2;
background: #edcc61; background: #edcc61;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.38095), inset 0 0 0 1px rgba(255, 255, 255, 0.19048); box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.31746), inset 0 0 0 1px rgba(255, 255, 255, 0.19048);
color: #ede9e5;  
font-size: 45px; } font-size: 45px; }
.tile.tile-512 { .tile.tile-512 {
  color: #f9f6f2;
background: #edc850; background: #edc850;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.47619), inset 0 0 0 1px rgba(255, 255, 255, 0.2381); box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.39683), inset 0 0 0 1px rgba(255, 255, 255, 0.2381);
color: #f9f6f2;  
font-size: 45px; } font-size: 45px; }
.tile.tile-1024 { .tile.tile-1024 {
  color: #f9f6f2;
background: #edc53f; background: #edc53f;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.57143), inset 0 0 0 1px rgba(255, 255, 255, 0.28571); box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.47619), inset 0 0 0 1px rgba(255, 255, 255, 0.28571);
color: #f9f6f2;  
font-size: 35px; } font-size: 35px; }
.tile.tile-2048 { .tile.tile-2048 {
  color: #f9f6f2;
background: #edc22e; background: #edc22e;
box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.66667), inset 0 0 0 1px rgba(255, 255, 255, 0.33333); box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.55556), inset 0 0 0 1px rgba(255, 255, 255, 0.33333);
color: #f9f6f2;  
font-size: 35px; } font-size: 35px; }
   
  .game-intro {
  margin-bottom: 0; }
   
  .game-explanation {
  margin-top: 50px; }
   
@import "helpers"; @import "helpers";
@import "fonts/clear-sans.css"; @import "fonts/clear-sans.css";
   
$field-width: 500px; $field-width: 500px;
$grid-spacing: 15px; $grid-spacing: 15px;
$grid-row-cells: 4; $grid-row-cells: 4;
$tile-size: ($field-width - $grid-spacing * ($grid-row-cells + 1)) / $grid-row-cells; $tile-size: ($field-width - $grid-spacing * ($grid-row-cells + 1)) / $grid-row-cells;
$tile-border-radius: 3px; $tile-border-radius: 3px;
   
$text-color: #776E65; $text-color: #776E65;
$gold-text-color: #f9f6f2; $bright-text-color: #f9f6f2;
   
$tile-color: #eee4da; $tile-color: #eee4da;
$tile-gold-color: #edc22e; $tile-gold-color: #edc22e;
$tile-gold-glow-color: lighten($tile-gold-color, 15%); $tile-gold-glow-color: lighten($tile-gold-color, 15%);
   
html, body { html, body {
margin: 0; margin: 0;
padding: 0; padding: 0;
   
background: #faf8ef; background: #faf8ef;
color: $text-color; color: $text-color;
font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif; font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
} }
   
body { body {
margin: 80px 0; margin: 80px 0;
} }
   
h1 { h1 {
font-size: 80px; font-size: 80px;
font-weight: bold; font-weight: bold;
margin: 0; margin: 0;
} }
   
  p {
  margin-top: 0;
  margin-bottom: 10px;
  line-height: 1.65;
  }
   
  a {
  color: $text-color;
  font-weight: bold;
  text-decoration: underline;
  }
   
  strong {
  &.important {
  text-transform: uppercase;
  }
  }
   
  hr {
  border: none;
  border-bottom: 1px solid lighten($text-color, 40%);
  margin-top: 20px;
  margin-bottom: 30px;
  }
   
.container { .container {
width: $field-width; width: $field-width;
margin: 0 auto; margin: 0 auto;
} }
   
.game-container { .game-container {
margin-top: 50px; margin-top: 40px;
position: relative; position: relative;
padding: $grid-spacing; padding: $grid-spacing;
   
cursor: default; cursor: default;
-webkit-touch-callout: none; -webkit-touch-callout: none;
-webkit-user-select: none; -webkit-user-select: none;
-moz-user-select: none; -moz-user-select: none;
   
background: #bbada0; background: #bbada0;
border-radius: $tile-border-radius * 2; border-radius: $tile-border-radius * 2;
width: $field-width; width: $field-width;
height: $field-width; height: $field-width;
box-sizing: border-box; box-sizing: border-box;
} }
   
.grid-container { .grid-container {
position: absolute; position: absolute;
z-index: 1; z-index: 1;
} }
   
.grid-row { .grid-row {
margin-bottom: $grid-spacing; margin-bottom: $grid-spacing;
   
&:last-child { &:last-child {
margin-bottom: 0; margin-bottom: 0;
} }
   
&:after { &:after {
content: ""; content: "";
display: block; display: block;
clear: both; clear: both;
} }
} }
   
.grid-cell { .grid-cell {
width: $tile-size; width: $tile-size;
height: $tile-size; height: $tile-size;
margin-right: $grid-spacing; margin-right: $grid-spacing;
float: left; float: left;
   
border-radius: $tile-border-radius; border-radius: $tile-border-radius;
   
background: rgba($tile-color, .35); background: rgba($tile-color, .35);
   
&:last-child { &:last-child {
margin-right: 0; margin-right: 0;
} }
} }
   
.tile-container { .tile-container {
position: absolute; position: absolute;
z-index: 2; z-index: 2;
} }
   
.tile { .tile {
background: red; background: red;
width: $tile-size; width: $tile-size;
height: $tile-size; height: $tile-size;
border-radius: $tile-border-radius; border-radius: $tile-border-radius;
   
background: $tile-color; background: $tile-color;
text-align: center; text-align: center;
line-height: $tile-size + 10px; line-height: $tile-size + 10px;
font-size: 55px; font-size: 55px;
font-weight: bold; font-weight: bold;
   
@include transition(200ms ease); @include transition(200ms ease);
@include transition-property(top, left); @include transition-property(top, left);
   
  // Build position classes
@for $x from 1 through $grid-row-cells { @for $x from 1 through $grid-row-cells {
@for $y from 1 through $grid-row-cells { @for $y from 1 through $grid-row-cells {
&.tile-position-#{$x}-#{$y} { &.tile-position-#{$x}-#{$y} {
position: absolute; position: absolute;
left: ($tile-size + $grid-spacing) * ($x - 1); left: ($tile-size + $grid-spacing) * ($x - 1);
top: ($tile-size + $grid-spacing) * ($y - 1); top: ($tile-size + $grid-spacing) * ($y - 1);
} }
} }
} }
   
$base: 2; $base: 2;
$exponent: 1; $exponent: 1;
$limit: 11; $limit: 11;
   
  // Colors for all 11 states, false = no special color
  $special-colors: false false, // 2
  false false, // 4
  #f78e48 true, // 8
  #fc5e2e true, // 16
  #ff3333 true, // 32
  #ff0000 true, // 64
  false true, // 128
  false true, // 256
  false true, // 512
  false true, // 1024
  false true; // 2048
   
  // Build tile colors
@while $exponent <= $limit { @while $exponent <= $limit {
$power: pow($base, $exponent); $power: pow($base, $exponent);
   
$gold-percent: ($exponent - 1) / ($limit - 1) * 100;  
   
$gold-text-percent: min($exponent + 2, $limit) / ($limit) * 100;  
   
$glow-opacity: max($exponent - 4, 0) / ($limit - 4);  
   
&.tile-#{$power} { &.tile-#{$power} {
background: mix($tile-gold-color, $tile-color, $gold-percent); // Calculate base background color
  $gold-percent: ($exponent - 1) / ($limit - 1) * 100;
box-shadow: 0 0 30px 10px rgba($tile-gold-glow-color, $glow-opacity / 1.5), $mixed-background: mix($tile-gold-color, $tile-color, $gold-percent);
   
  $nth-color: nth($special-colors, $exponent);
   
  $special-background: nth($nth-color, 1);
  $bright-color: nth($nth-color, 2);
   
  @if $special-background {
  $mixed-background: mix($special-background, $mixed-background, 55%);
  }
   
  @if $bright-color {
  color: $bright-text-color;
  }
   
  // Set background
  background: $mixed-background;
   
  // Add glow
  $glow-opacity: max($exponent - 4, 0) / ($limit - 4);
  box-shadow: 0 0 30px 10px rgba($tile-gold-glow-color, $glow-opacity / 1.8),
inset 0 0 0 1px rgba(white, $glow-opacity / 3); inset 0 0 0 1px rgba(white, $glow-opacity / 3);
   
@if $exponent >= 8 { // Adjust font size for bigger numbers
color: mix($gold-text-color, $text-color, $gold-text-percent);  
}  
   
@if $power >= 100 and $power < 1000 { @if $power >= 100 and $power < 1000 {
font-size: 45px; font-size: 45px;
} @else if $power >= 1000 { } @else if $power >= 1000 {
font-size: 35px; font-size: 35px;
} }
} }
   
$exponent: $exponent + 1; $exponent: $exponent + 1;
} }
} }
   
  .game-intro {
  margin-bottom: 0;
  }
   
  .game-explanation {
  margin-top: 50px;
  }
   
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