main.css

@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;
    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;
}

@-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: #bbada0;
    padding: 15px 25px;
    font-size: 25px;
    height: 25px;
    line-height: 47px;
    font-weight: bold;
    border-radius: 3px;
    color: white;
    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: #eee4da;
}

.score-container .score-addition, .best-container .score-addition {
    position: absolute;
    right: 30px;
    color: red;
    font-size: 25px;
    line-height: 25px;
    font-weight: bold;
    color: rgba(119, 110, 101, 0.9);
    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;
}

a {
    color: #776e65;
    font-weight: bold;
    text-decoration: underline;
    cursor: pointer;
}

strong.important {
    text-transform: uppercase;
}

hr {
    border: none;
    border-bottom: 1px solid #d8d4d0;
    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: #bbada0;
    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(238, 228, 218, 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: 60px;
    font-weight: bold;
    height: 60px;
    line-height: 60px;
    margin-top: 222px;
}

.game-container .game-message .lower {
    display: block;
    margin-top: 59px;
}

.game-container .game-message a {
    display: inline-block;
    background: #8f7a66;
    border-radius: 3px;
    padding: 0 20px;
    text-decoration: none;
    color: #f9f6f2;
    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(237, 194, 46, 0.5);
    color: #f9f6f2;
}

.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: 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, .tile .tile-inner {
    width: 107px;
    height: 107px;
    line-height: 107px;
}

.tile.tile-position-1-1 {
    -webkit-transform: translate(0px, 0px);
    -moz-transform: translate(0px, 0px);
    -ms-transform: translate(0px, 0px);
    transform: translate(0px, 0px);
}

.tile.tile-position-1-2 {
    -webkit-transform: translate(0px, 121px);
    -moz-transform: translate(0px, 121px);
    -ms-transform: translate(0px, 121px);
    transform: translate(0px, 121px);
}

.tile.tile-position-1-3 {
    -webkit-transform: translate(0px, 242px);
    -moz-transform: translate(0px, 242px);
    -ms-transform: translate(0px, 242px);
    transform: translate(0px, 242px);
}

.tile.tile-position-1-4 {
    -webkit-transform: translate(0px, 363px);
    -moz-transform: translate(0px, 363px);
    -ms-transform: translate(0px, 363px);
    transform: translate(0px, 363px);
}

.tile.tile-position-2-1 {
    -webkit-transform: translate(121px, 0px);
    -moz-transform: translate(121px, 0px);
    -ms-transform: translate(121px, 0px);
    transform: translate(121px, 0px);
}

.tile.tile-position-2-2 {
    -webkit-transform: translate(121px, 121px);
    -moz-transform: translate(121px, 121px);
    -ms-transform: translate(121px, 121px);
    transform: translate(121px, 121px);
}

.tile.tile-position-2-3 {
    -webkit-transform: translate(121px, 242px);
    -moz-transform: translate(121px, 242px);
    -ms-transform: translate(121px, 242px);
    transform: translate(121px, 242px);
}

.tile.tile-position-2-4 {
    -webkit-transform: translate(121px, 363px);
    -moz-transform: translate(121px, 363px);
    -ms-transform: translate(121px, 363px);
    transform: translate(121px, 363px);
}

.tile.tile-position-3-1 {
    -webkit-transform: translate(242px, 0px);
    -moz-transform: translate(242px, 0px);
    -ms-transform: translate(242px, 0px);
    transform: translate(242px, 0px);
}

.tile.tile-position-3-2 {
    -webkit-transform: translate(242px, 121px);
    -moz-transform: translate(242px, 121px);
    -ms-transform: translate(242px, 121px);
    transform: translate(242px, 121px);
}

.tile.tile-position-3-3 {
    -webkit-transform: translate(242px, 242px);
    -moz-transform: translate(242px, 242px);
    -ms-transform: translate(242px, 242px);
    transform: translate(242px, 242px);
}

.tile.tile-position-3-4 {
    -webkit-transform: translate(242px, 363px);
    -moz-transform: translate(242px, 363px);
    -ms-transform: translate(242px, 363px);
    transform: translate(242px, 363px);
}

.tile.tile-position-4-1 {
    -webkit-transform: translate(363px, 0px);
    -moz-transform: translate(363px, 0px);
    -ms-transform: translate(363px, 0px);
    transform: translate(363px, 0px);
}

.tile.tile-position-4-2 {
    -webkit-transform: translate(363px, 121px);
    -moz-transform: translate(363px, 121px);
    -ms-transform: translate(363px, 121px);
    transform: translate(363px, 121px);
}

.tile.tile-position-4-3 {
    -webkit-transform: translate(363px, 242px);
    -moz-transform: translate(363px, 242px);
    -ms-transform: translate(363px, 242px);
    transform: translate(363px, 242px);
}

.tile.tile-position-4-4 {
    -webkit-transform: translate(363px, 363px);
    -moz-transform: translate(363px, 363px);
    -ms-transform: translate(363px, 363px);
    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: #fff;
    text-align: center;
    font-weight: bold;
    z-index: 10;
    font-size: 0px;
}

.tile.tile-2 .tile-inner {
    font-size: 0px;
    background-image: url('../img/vanilla-cupcake.jpg');
    background-size: cover;
}

.tile.tile-4 .tile-inner {
    font-size: 0px;
    background-image: url('../img/strawberry-vanilla-cupcake.jpg');
    background-size: cover;
}

.tile.tile-8 .tile-inner {
    font-size: 0px;
    background-image: url('../img/lemon-cupcake.jpg');
    background-size: cover;
}

.tile.tile-16 .tile-inner {
    font-size: 0px;
    background-image: url('../img/red-velvet-cupcake.jpg');
    background-size: cover;
}

.tile.tile-32 .tile-inner {
    font-size: 0px;
    background-image: url('../img/mint-cupcake.jpg');
    background-size: cover;
}

.tile.tile-64 .tile-inner {
    font-size: 0px;
    background-image: url('../img/jumbo-oreo-cupcake.jpg');
    background-size: cover;
}

.tile.tile-128 .tile-inner {
    font-size: 0px;
    background-image: url('../img/birthday-cupcake.jpg');
    background-size: cover;
}

.tile.tile-256 .tile-inner {
    font-size: 0px;
    background-image: url('../img/royal-blue-cupcake.jpg');
    background-size: cover;
}

.tile.tile-512 .tile-inner {
    font-size: 0px;
    background-image: url('../img/caramel-cupcake.jpg');
    background-size: cover;
}

.tile.tile-1024 .tile-inner {
    font-size: 0px;
    background-image: url('../img/pink-champagne-cupcake.jpg');
    background-size: cover;
}

.tile.tile-2048 .tile-inner {
    font-size: 0px;
    background-image: url('../img/christmas-cupcake.jpg');
    /* use ../img/pumpkin-cupcake.jpg for fall */
    background-size: cover;
}

.tile.tile-super .tile-inner {
    font-size: 0px;
    background-image: url('../img/gold-cupcake.jpg');
    background-size: cover;
}

@-webkit-keyframes appear {
    0% {
        opacity: 0;
        -webkit-transform: scale(0);
        -moz-transform: scale(0);
        -ms-transform: scale(0);
        transform: scale(0);
    }
    100% {
        opacity: 1;
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
}

@-moz-keyframes appear {
    0% {
        opacity: 0;
        -webkit-transform: scale(0);
        -moz-transform: scale(0);
        -ms-transform: scale(0);
        transform: scale(0);
    }
    100% {
        opacity: 1;
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
}

@keyframes appear {
    0% {
        opacity: 0;
        -webkit-transform: scale(0);
        -moz-transform: scale(0);
        -ms-transform: scale(0);
        transform: scale(0);
    }
    100% {
        opacity: 1;
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
}

.tile-new .tile-inner {
    -webkit-animation: appear 200ms ease 100ms;
    -moz-animation: appear 200ms ease 100ms;
    animation: appear 200ms ease 100ms;
    -webkit-animation-fill-mode: backwards;
    -moz-animation-fill-mode: backwards;
    animation-fill-mode: backwards;
}

@-webkit-keyframes pop {
    0% {
        -webkit-transform: scale(0);
        -moz-transform: scale(0);
        -ms-transform: scale(0);
        transform: scale(0);
    }
    50% {
        -webkit-transform: scale(1.2);
        -moz-transform: scale(1.2);
        -ms-transform: scale(1.2);
        transform: scale(1.2);
    }
    100% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
}

@-moz-keyframes pop {
    0% {
        -webkit-transform: scale(0);
        -moz-transform: scale(0);
        -ms-transform: scale(0);
        transform: scale(0);
    }
    50% {
        -webkit-transform: scale(1.2);
        -moz-transform: scale(1.2);
        -ms-transform: scale(1.2);
        transform: scale(1.2);
    }
    100% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
}

@keyframes pop {
    0% {
        -webkit-transform: scale(0);
        -moz-transform: scale(0);
        -ms-transform: scale(0);
        transform: scale(0);
    }
    50% {
        -webkit-transform: scale(1.2);
        -moz-transform: scale(1.2);
        -ms-transform: scale(1.2);
        transform: scale(1.2);
    }
    100% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -ms-transform: scale(1);
        transform: scale(1);
    }
}

.tile-merged .tile-inner {
    z-index: 20;
    -webkit-animation: pop 200ms ease 100ms;
    -moz-animation: pop 200ms ease 100ms;
    animation: pop 200ms ease 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;
}

.restart-button {
    display: inline-block;
    background: #8f7a66;
    border-radius: 3px;
    padding: 0 20px;
    text-decoration: none;
    color: #f9f6f2;
    height: 40px;
    line-height: 42px;
    display: block;
    text-align: center;
    float: right;
}

.game-explanation {
    margin-top: 50px;
}

.github-ribbon {
    position: fixed;
    top: 0;
    right: 0;
}

@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;
    }
    
    .container {
        width: 280px;
        margin: 0 auto;
    }
    
    .score-container,
    .best-container {
        margin-top: 0;
        padding: 15px 10px;
        min-width: 40px;
    }
    
    .heading {
        margin-bottom: 10px;
    }
    
    .game-intro {
        width: 55%;
        display: block;
        box-sizing: border-box;
        line-height: 1.65;
    }
    
    .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: #bbada0;
        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(238, 228, 218, 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: 60px;
        font-weight: bold;
        height: 60px;
        line-height: 60px;
        margin-top: 222px;
    }
    
    .game-container .game-message .lower {
        display: block;
        margin-top: 59px;
    }
    
    .game-container .game-message a {
        display: inline-block;
        background: #8f7a66;
        border-radius: 3px;
        padding: 0 20px;
        text-decoration: none;
        color: #f9f6f2;
        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(237, 194, 46, 0.5);
        color: #f9f6f2;
    }
    
    .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: 57.5px;
        height: 57.5px;
        margin-right: 10px;
        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,
    .tile .tile-inner {
        width: 58px;
        height: 58px;
        line-height: 58px;
    }
    
    .tile.tile-position-1-1 {
        -webkit-transform: translate(0px, 0px);
        -moz-transform: translate(0px, 0px);
        -ms-transform: translate(0px, 0px);
        transform: translate(0px, 0px);
    }
    
    .tile.tile-position-1-2 {
        -webkit-transform: translate(0px, 67px);
        -moz-transform: translate(0px, 67px);
        -ms-transform: translate(0px, 67px);
        transform: translate(0px, 67px);
    }
    
    .tile.tile-position-1-3 {
        -webkit-transform: translate(0px, 135px);
        -moz-transform: translate(0px, 135px);
        -ms-transform: translate(0px, 135px);
        transform: translate(0px, 135px);
    }
    
    .tile.tile-position-1-4 {
        -webkit-transform: translate(0px, 202px);
        -moz-transform: translate(0px, 202px);
        -ms-transform: translate(0px, 202px);
        transform: translate(0px, 202px);
    }
    
    .tile.tile-position-2-1 {
        -webkit-transform: translate(67px, 0px);
        -moz-transform: translate(67px, 0px);
        -ms-transform: translate(67px, 0px);
        transform: translate(67px, 0px);
    }
    
    .tile.tile-position-2-2 {
        -webkit-transform: translate(67px, 67px);
        -moz-transform: translate(67px, 67px);
        -ms-transform: translate(67px, 67px);
        transform: translate(67px, 67px);
    }
    
    .tile.tile-position-2-3 {
        -webkit-transform: translate(67px, 135px);
        -moz-transform: translate(67px, 135px);
        -ms-transform: translate(67px, 135px);
        transform: translate(67px, 135px);
    }
    
    .tile.tile-position-2-4 {
        -webkit-transform: translate(67px, 202px);
        -moz-transform: translate(67px, 202px);
        -ms-transform: translate(67px, 202px);
        transform: translate(67px, 202px);
    }
    
    .tile.tile-position-3-1 {
        -webkit-transform: translate(135px, 0px);
        -moz-transform: translate(135px, 0px);
        -ms-transform: translate(135px, 0px);
        transform: translate(135px, 0px);
    }
    
    .tile.tile-position-3-2 {
        -webkit-transform: translate(135px, 67px);
        -moz-transform: translate(135px, 67px);
        -ms-transform: translate(135px, 67px);
        transform: translate(135px, 67px);
    }
    
    .tile.tile-position-3-3 {
        -webkit-transform: translate(135px, 135px);
        -moz-transform: translate(135px, 135px);
        -ms-transform: translate(135px, 135px);
        transform: translate(135px, 135px);
    }
    
    .tile.tile-position-3-4 {
        -webkit-transform: translate(135px, 202px);
        -moz-transform: translate(135px, 202px);
        -ms-transform: translate(135px, 202px);
        transform: translate(135px, 202px);
    }
    
    .tile.tile-position-4-1 {
        -webkit-transform: translate(202px, 0px);
        -moz-transform: translate(202px, 0px);
        -ms-transform: translate(202px, 0px);
        transform: translate(202px, 0px);
    }
    
    .tile.tile-position-4-2 {
        -webkit-transform: translate(202px, 67px);
        -moz-transform: translate(202px, 67px);
        -ms-transform: translate(202px, 67px);
        transform: translate(202px, 67px);
    }
    
    .tile.tile-position-4-3 {
        -webkit-transform: translate(202px, 135px);
        -moz-transform: translate(202px, 135px);
        -ms-transform: translate(202px, 135px);
        transform: translate(202px, 135px);
    }
    
    .tile.tile-position-4-4 {
        -webkit-transform: translate(202px, 202px);
        -moz-transform: translate(202px, 202px);
        -ms-transform: translate(202px, 202px);
        transform: translate(202px, 202px);
    }
    
    .tile .tile-inner {
        font-size: 35px;
    }
    
    .game-message p {
        font-size: 30px !important;
        height: 30px !important;
        line-height: 30px !important;
        margin-top: 90px !important;
    }
    
    .game-message .lower {
        margin-top: 30px !important;
    }
    
    .github-ribbon {
        display: none;
    }
}