generate tile colors automatically
generate tile colors automatically

file:a/index.html -> file:b/index.html
--- a/index.html
+++ b/index.html
@@ -4,7 +4,7 @@
   <meta charset="utf-8">
   <title>2048</title>
 
-  <link href="style/style.css" rel="stylesheet" type="text/css">
+  <link href="style/main.css" rel="stylesheet" type="text/css">
 </head>
 <body>
   <div class="container">
@@ -45,6 +45,12 @@
         <div class="tile tile-4 tile-position-2-3">
           4
         </div>
+        <div class="tile tile-512 tile-position-3-2">
+          512
+        </div>
+        <div class="tile tile-2048 tile-position-4-4">
+          2048
+        </div>
       </div>
     </div>
   </div>

--- /dev/null
+++ b/style/helpers.scss
@@ -1,1 +1,22 @@
+// Exponent
+// From: https://github.com/Team-Sass/Sassy-math/blob/master/sass/math.scss#L36
 
+@function exponent($base, $exponent) {
+  // reset value
+  $value: $base;
+  // positive intergers get multiplied
+  @if $exponent > 1 {
+    @for $i from 2 through $exponent {
+      $value: $value * $base; } }
+  // negitive intergers get divided. A number divided by itself is 1
+  @if $exponent < 1 {
+    @for $i from 0 through -$exponent {
+      $value: $value / $base; } }
+  // return the last value written
+  @return $value;
+}
+
+@function pow($base, $exponent) {
+  @return exponent($base, $exponent);
+}
+

file:b/style/main.css (new)
--- /dev/null
+++ b/style/main.css
@@ -1,1 +1,159 @@
+@import url(fonts/clear-sans.css);
+html, body {
+  margin: 0;
+  padding: 0;
+  background: #faf8ef;
+  color: #776E65;
+  font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif; }
 
+body {
+  margin: 80px 0; }
+
+h1 {
+  font-size: 80px;
+  font-weight: bold;
+  margin: 0; }
+
+.container {
+  width: 500px;
+  margin: 0 auto; }
+
+.game-container {
+  margin-top: 50px;
+  position: relative;
+  padding: 15px;
+  background: #bbada0;
+  border-radius: 6px;
+  width: 500px;
+  height: 500px;
+  box-sizing: border-box; }
+
+.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: 106.25px;
+  height: 106.25px;
+  margin-right: 15px;
+  float: left;
+  border-radius: 3px;
+  background: rgba(238, 228, 218, 0.35); }
+  .grid-cell:last-child {
+    margin-right: 0; }
+
+.tile-container {
+  position: absolute;
+  z-index: 2; }
+
+.tile {
+  background: red;
+  width: 106.25px;
+  height: 106.25px;
+  border-radius: 3px;
+  background: #eee4da;
+  text-align: center;
+  line-height: 116.25px;
+  font-size: 60px;
+  font-weight: bold; }
+  .tile.tile-position-1-1 {
+    position: absolute;
+    left: 0px;
+    top: 0px; }
+  .tile.tile-position-1-2 {
+    position: absolute;
+    left: 0px;
+    top: 121.25px; }
+  .tile.tile-position-1-3 {
+    position: absolute;
+    left: 0px;
+    top: 242.5px; }
+  .tile.tile-position-1-4 {
+    position: absolute;
+    left: 0px;
+    top: 363.75px; }
+  .tile.tile-position-2-1 {
+    position: absolute;
+    left: 121.25px;
+    top: 0px; }
+  .tile.tile-position-2-2 {
+    position: absolute;
+    left: 121.25px;
+    top: 121.25px; }
+  .tile.tile-position-2-3 {
+    position: absolute;
+    left: 121.25px;
+    top: 242.5px; }
+  .tile.tile-position-2-4 {
+    position: absolute;
+    left: 121.25px;
+    top: 363.75px; }
+  .tile.tile-position-3-1 {
+    position: absolute;
+    left: 242.5px;
+    top: 0px; }
+  .tile.tile-position-3-2 {
+    position: absolute;
+    left: 242.5px;
+    top: 121.25px; }
+  .tile.tile-position-3-3 {
+    position: absolute;
+    left: 242.5px;
+    top: 242.5px; }
+  .tile.tile-position-3-4 {
+    position: absolute;
+    left: 242.5px;
+    top: 363.75px; }
+  .tile.tile-position-4-1 {
+    position: absolute;
+    left: 363.75px;
+    top: 0px; }
+  .tile.tile-position-4-2 {
+    position: absolute;
+    left: 363.75px;
+    top: 121.25px; }
+  .tile.tile-position-4-3 {
+    position: absolute;
+    left: 363.75px;
+    top: 242.5px; }
+  .tile.tile-position-4-4 {
+    position: absolute;
+    left: 363.75px;
+    top: 363.75px; }
+  .tile.tile-2 {
+    background: #eee4da; }
+  .tile.tile-4 {
+    background: #ede0ca; }
+  .tile.tile-8 {
+    background: #edddba; }
+  .tile.tile-16 {
+    background: #eddaab; }
+  .tile.tile-32 {
+    background: #edd79b; }
+  .tile.tile-64 {
+    background: #edd48b; }
+  .tile.tile-128 {
+    background: #edd17c;
+    font-size: 45px; }
+  .tile.tile-256 {
+    background: #edce6c;
+    font-size: 45px; }
+  .tile.tile-512 {
+    background: #edcb5c;
+    font-size: 45px; }
+  .tile.tile-1024 {
+    background: #edc84d;
+    font-size: 35px; }
+  .tile.tile-2048 {
+    background: #edc53d;
+    font-size: 35px; }
+

file:b/style/main.scss (new)
--- /dev/null
+++ b/style/main.scss
@@ -1,1 +1,133 @@
+@import "helpers";
+@import "fonts/clear-sans.css";
 
+$field-width: 500px;
+$grid-spacing: 15px;
+$grid-row-cells: 4;
+$tile-size: ($field-width - $grid-spacing * ($grid-row-cells + 1)) / $grid-row-cells;
+$tile-border-radius: 3px;
+
+$tile-color: #eee4da;
+$tile-gold-color: #edc22e;
+
+html, body {
+  margin: 0;
+  padding: 0;
+
+  background: #faf8ef;
+  color: #776E65;
+  font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif;
+}
+
+body {
+  margin: 80px 0;
+}
+
+h1 {
+  font-size: 80px;
+  font-weight: bold;
+  margin: 0;
+}
+
+.container {
+  width: $field-width;
+  margin: 0 auto;
+}
+
+.game-container {
+  margin-top: 50px;
+  position: relative;
+  padding: $grid-spacing;
+
+  background: #bbada0;
+  border-radius: $tile-border-radius * 2;
+  width: $field-width;
+  height: $field-width;
+  box-sizing: border-box;
+}
+
+.grid-container {
+  position: absolute;
+  z-index: 1;
+}
+
+.grid-row {
+  margin-bottom: $grid-spacing;
+
+  &:last-child {
+    margin-bottom: 0;
+  }
+
+  &:after {
+    content: "";
+    display: block;
+    clear: both;
+  }
+}
+
+.grid-cell {
+  width: $tile-size;
+  height: $tile-size;
+  margin-right: $grid-spacing;
+  float: left;
+
+  border-radius: $tile-border-radius;
+
+  background: rgba($tile-color, .35);
+
+  &:last-child {
+    margin-right: 0;
+  }
+}
+
+.tile-container {
+  position: absolute;
+  z-index: 2;
+}
+
+.tile {
+  background: red;
+  width: $tile-size;
+  height: $tile-size;
+  border-radius: $tile-border-radius;
+
+  background: $tile-color;
+  text-align: center;
+  line-height: $tile-size + 10px;
+  font-size: 60px;
+  font-weight: bold;
+
+  @for $x from 1 through $grid-row-cells {
+    @for $y from 1 through $grid-row-cells {
+      &.tile-position-#{$x}-#{$y} {
+        position: absolute;
+        left: ($tile-size + $grid-spacing) * ($x - 1);
+        top: ($tile-size + $grid-spacing) * ($y - 1);
+      }
+    }
+  }
+
+  $base: 2;
+  $exponent: 1;
+  $limit: 11;
+
+  @while $exponent <= $limit {
+    $power: pow($base, $exponent);
+    $percent: (($exponent - 1) / $limit) * 100;
+
+    &.tile-#{$power} {
+      background: mix($tile-gold-color, $tile-color, $percent);
+
+      @if $power >= 100 and $power < 1000 {
+        font-size: 45px;
+      } @else if $power >= 1000 {
+        font-size: 35px;
+      }
+    }
+
+    $exponent: $exponent + 1;
+  }
+}
+
+
+

file:a/style/style.css (deleted)
--- a/style/style.css
+++ /dev/null
@@ -1,132 +1,1 @@
-@import url(fonts/clear-sans.css);
-html, body {
-  margin: 0;
-  padding: 0;
-  background: #faf8ef;
-  color: #776E65;
-  font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif; }
 
-body {
-  margin: 80px 0; }
-
-h1 {
-  font-size: 80px;
-  font-weight: bold;
-  margin: 0; }
-
-.container {
-  width: 500px;
-  margin: 0 auto; }
-
-.game-container {
-  margin-top: 50px;
-  position: relative;
-  padding: 15px;
-  background: #bbada0;
-  border-radius: 6px;
-  width: 500px;
-  height: 500px;
-  box-sizing: border-box; }
-
-.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: 106.25px;
-  height: 106.25px;
-  margin-right: 15px;
-  float: left;
-  border-radius: 3px;
-  background: rgba(238, 228, 218, 0.35); }
-  .grid-cell:last-child {
-    margin-right: 0; }
-
-.tile-container {
-  position: absolute;
-  z-index: 2; }
-
-.tile {
-  background: red;
-  width: 106.25px;
-  height: 106.25px;
-  border-radius: 3px;
-  background: #eee4da;
-  text-align: center;
-  line-height: 116.25px;
-  font-size: 60px;
-  font-weight: bold; }
-  .tile.tile-position-1-1 {
-    position: absolute;
-    left: 0px;
-    top: 0px; }
-  .tile.tile-position-1-2 {
-    position: absolute;
-    left: 0px;
-    top: 121.25px; }
-  .tile.tile-position-1-3 {
-    position: absolute;
-    left: 0px;
-    top: 242.5px; }
-  .tile.tile-position-1-4 {
-    position: absolute;
-    left: 0px;
-    top: 363.75px; }
-  .tile.tile-position-2-1 {
-    position: absolute;
-    left: 121.25px;
-    top: 0px; }
-  .tile.tile-position-2-2 {
-    position: absolute;
-    left: 121.25px;
-    top: 121.25px; }
-  .tile.tile-position-2-3 {
-    position: absolute;
-    left: 121.25px;
-    top: 242.5px; }
-  .tile.tile-position-2-4 {
-    position: absolute;
-    left: 121.25px;
-    top: 363.75px; }
-  .tile.tile-position-3-1 {
-    position: absolute;
-    left: 242.5px;
-    top: 0px; }
-  .tile.tile-position-3-2 {
-    position: absolute;
-    left: 242.5px;
-    top: 121.25px; }
-  .tile.tile-position-3-3 {
-    position: absolute;
-    left: 242.5px;
-    top: 242.5px; }
-  .tile.tile-position-3-4 {
-    position: absolute;
-    left: 242.5px;
-    top: 363.75px; }
-  .tile.tile-position-4-1 {
-    position: absolute;
-    left: 363.75px;
-    top: 0px; }
-  .tile.tile-position-4-2 {
-    position: absolute;
-    left: 363.75px;
-    top: 121.25px; }
-  .tile.tile-position-4-3 {
-    position: absolute;
-    left: 363.75px;
-    top: 242.5px; }
-  .tile.tile-position-4-4 {
-    position: absolute;
-    left: 363.75px;
-    top: 363.75px; }
-

file:a/style/style.scss (deleted)
--- a/style/style.scss
+++ /dev/null
@@ -1,110 +1,1 @@
-@import "fonts/clear-sans.css";
 
-$field-width: 500px;
-$grid-spacing: 15px;
-$grid-row-cells: 4;
-$tile-size: ($field-width - $grid-spacing * ($grid-row-cells + 1)) / $grid-row-cells;
-$tile-border-radius: 3px;
-
-$tile-color: #eee4da;
-
-html, body {
-  margin: 0;
-  padding: 0;
-
-  background: #faf8ef;
-  color: #776E65;
-  font-family: "Clear Sans", "Helvetica Neue", Arial, sans-serif;
-}
-
-body {
-  margin: 80px 0;
-}
-
-h1 {
-  font-size: 80px;
-  font-weight: bold;
-  margin: 0;
-}
-
-.container {
-  width: $field-width;
-  margin: 0 auto;
-}
-
-.game-container {
-  margin-top: 50px;
-  position: relative;
-  padding: $grid-spacing;
-
-  background: #bbada0;
-  border-radius: $tile-border-radius * 2;
-  width: $field-width;
-  height: $field-width;
-  box-sizing: border-box;
-}
-
-.grid-container {
-  position: absolute;
-  z-index: 1;
-}
-
-.grid-row {
-  margin-bottom: $grid-spacing;
-
-  &:last-child {
-    margin-bottom: 0;
-  }
-
-  &:after {
-    content: "";
-    display: block;
-    clear: both;
-  }
-}
-
-.grid-cell {
-  width: $tile-size;
-  height: $tile-size;
-  margin-right: $grid-spacing;
-  float: left;
-
-  border-radius: $tile-border-radius;
-
-  background: rgba($tile-color, .35);
-
-  &:last-child {
-    margin-right: 0;
-  }
-}
-
-.tile-container {
-  position: absolute;
-  z-index: 2;
-}
-
-.tile {
-  background: red;
-  width: $tile-size;
-  height: $tile-size;
-  border-radius: $tile-border-radius;
-
-  background: $tile-color;
-  text-align: center;
-  line-height: $tile-size + 10px;
-  font-size: 60px;
-  font-weight: bold;
-
-  @for $x from 1 through $grid-row-cells {
-    @for $y from 1 through $grid-row-cells {
-      &.tile-position-#{$x}-#{$y} {
-        position: absolute;
-        left: ($tile-size + $grid-spacing) * ($x - 1);
-        top: ($tile-size + $grid-spacing) * ($y - 1);
-      }
-    }
-  }
-}
-
-
-

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