body {
    font-size: 14px;
}

@keyframes animate-top {
    0% {
        background: #3e3e3e; /* Old browsers */
        background: -moz-linear-gradient(top, #3e3e3e 0%, #2b2b2b 100%); /* FF3.6+ */
        background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#3e3e3e), color-stop(100%,#2b2b2b)); /* Chrome,Safari4+ */
        background: -webkit-linear-gradient(top, #3e3e3e 0%,#2b2b2b 100%); /* Chrome10+,Safari5.1+ */
        background: -o-linear-gradient(top, #3e3e3e 0%,#2b2b2b 100%); /* Opera 11.10+ */
        background: -ms-linear-gradient(top, #3e3e3e 0%,#2b2b2b 100%); /* IE10+ */
        background: linear-gradient(to bottom, #3e3e3e 0%,#2b2b2b 100%); /* W3C */
        filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#3e3e3e', endColorstr='#2b2b2b',GradientType=0 );
    }

    100% {
        color: #474747;
        transform: translateX(0px) translateY(0.35em) translateZ(5px) rotateX(-90deg) rotateY(0deg) rotateZ(0deg);
    }
}

@keyframes animate-bottom {
    0% {
        color: #474747;
        opacity: 1;
    }

    100% {
        transform: translateX(0) translateY(0) translateZ(0) rotateX(0deg) rotateY(0deg) rotateZ(0deg);
        opacity: 1;
    }
}

@-webkit-keyframes animate-top {
    0% {
        background: #3e3e3e; /* Old browsers */
        background: -moz-linear-gradient(top, #3e3e3e 0%, #2b2b2b 100%); /* FF3.6+ */
        background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#3e3e3e), color-stop(100%,#2b2b2b)); /* Chrome,Safari4+ */
        background: -webkit-linear-gradient(top, #3e3e3e 0%,#2b2b2b 100%); /* Chrome10+,Safari5.1+ */
        background: -o-linear-gradient(top, #3e3e3e 0%,#2b2b2b 100%); /* Opera 11.10+ */
        background: -ms-linear-gradient(top, #3e3e3e 0%,#2b2b2b 100%); /* IE10+ */
        background: linear-gradient(to bottom, #3e3e3e 0%,#2b2b2b 100%); /* W3C */
        filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#3e3e3e', endColorstr='#2b2b2b',GradientType=0 );
    }

    100% {
        color: #474747;
        -webkit-transform: translateX(0px) translateY(0.35em) translateZ(5px) rotateX(-90deg) rotateY(0deg) rotateZ(0deg);
    }
}

@-webkit-keyframes animate-bottom {
    0% {
        color: #474747;
        opacity: 1;
    }

    100% {
        -webkit-transform: translateX(0) translateY(0) translateZ(0) rotateX(0deg) rotateY(0deg) rotateZ(0deg);
        opacity: 1;
    }
}

.number {
    position: relative;
    float: left;
    margin-right: 5px;
    font-size: 1.5em;
    width: 1em;
    height: 1.5em;
}

    .number span {
        position: absolute;
        display: block;
        font-weight: bold;
        text-align: center;
        box-sizing: border-box;
        -moz-box-sizing: border-box;
        -webkit-box-sizing: border-box;
        color: white;
        width: 1em;
        height: 1.5em;
        perspective: 7.14em;
    }

        .number span:before {
            display: block;
            height: 0.75em;
            overflow: hidden;
            line-height: 1.52em;
            border-bottom: 1px rgba(0, 0, 0, 0.5);
            border-radius: 20% 20% 0 0;
            background: #3e3e3e; /* Old browsers */
            background: -moz-linear-gradient(top, #3e3e3e 0%, #2b2b2b 100%); /* FF3.6+ */
            background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#3e3e3e), color-stop(100%,#2b2b2b)); /* Chrome,Safari4+ */
            background: -webkit-linear-gradient(top, #3e3e3e 0%,#2b2b2b 100%); /* Chrome10+,Safari5.1+ */
            background: -o-linear-gradient(top, #3e3e3e 0%,#2b2b2b 100%); /* Opera 11.10+ */
            background: -ms-linear-gradient(top, #3e3e3e 0%,#2b2b2b 100%); /* IE10+ */
            background: linear-gradient(to bottom, #3e3e3e 0%,#2b2b2b 100%); /* W3C */
            filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#3e3e3e', endColorstr='#2b2b2b',GradientType=0 ); /* IE6-9 */
        }

        .number span:after {
            display: block;
            height: 0.75em;
            overflow: hidden;
            line-height: 0;
            border-top: 1px solid rgba(0, 0, 0, 0.5);
            border-radius: 0 0 20% 20%;
            transition: color 100ms, background-color 100ms;
            background: #252525; /* Old browsers */
            background: -moz-linear-gradient(top, #252525 0%, #070707 100%); /* FF3.6+ */
            background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#252525), color-stop(100%,#070707)); /* Chrome,Safari4+ */
            background: -webkit-linear-gradient(top, #252525 0%,#070707 100%); /* Chrome10+,Safari5.1+ */
            background: -o-linear-gradient(top, #252525 0%,#070707 100%); /* Opera 11.10+ */
            background: -ms-linear-gradient(top, #252525 0%,#070707 100%); /* IE10+ */
            background: linear-gradient(to bottom, #252525 0%,#070707 100%); /* W3C */
            filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#252525', endColorstr='#070707',GradientType=0 ); /* IE6-9 */
        }


.flip .primary:before {
    animation: animate-top 250ms;
    -moz-animation-fill-mode: forwards;
    -webkit-animation: animate-top 250ms;
    -webkit-animation-fill-mode: forwards;
    background: #000000; /* Old browsers */
    background: -moz-linear-gradient(top, #000000 0%, #303030 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#000000), color-stop(100%,#303030)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, #000000 0%,#303030 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, #000000 0%,#303030 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top, #000000 0%,#303030 100%); /* IE10+ */
    background: linear-gradient(to bottom, #000000 0%,#303030 100%); /* W3C */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#000000', endColorstr='#303030',GradientType=0 ); /* IE6-9 */
}

.flip .primary:after {
    animation: animate-bottom 250ms;
    -moz-animation-fill-mode: forwards;
    animation-delay: 250ms;
    -webkit-animation: animate-bottom 250ms;
    -webkit-animation-fill-mode: forwards;
    -webkit-animation-delay: 250ms;
}

.primary:after {
    opacity: 0;
    transform: translateX(0) translateY(-0.28em) translateZ(0.35em) rotateX(91deg) rotateY(0deg) rotateZ(0deg);
    -webkit-transform: translateX(0) translateY(-0.28em) translateZ(0.35em) rotateX(91deg) rotateY(0deg) rotateZ(0deg);
}

.primary {
    z-index: 2;
}

.secondary {
    z-index: 1;
}

/* Number 0 */

[data-number="0"] span.primary:before {
    content: "0";
}

[data-number="0"] span.secondary:after {
    content: "0";
}

[data-number="0"] span.secondary:before {
    content: attr(title);
}

[data-number="0"] span.primary:after {
    content: attr(title);
}

/* Number 9 */

[data-number="9"] span.primary:before {
    content: "9";
}

[data-number="9"] span.secondary:after {
    content: "9";
}

[data-number="9"] span.secondary:before {
    content: attr(title);
}

[data-number="9"] span.primary:after {
    content: attr(title);
}

/* Number 8 */

[data-number="8"] span.primary:before {
    content: "8";
}

[data-number="8"] span.secondary:after {
    content: "8";
}

[data-number="8"] span.secondary:before {
    content: attr(title);
}

[data-number="8"] span.primary:after {
    content: attr(title);
}

/* Number 7 */

[data-number="7"] span.primary:before {
    content: "7";
}

[data-number="7"] span.secondary:after {
    content: "7";
}

[data-number="7"] span.secondary:before {
    content: attr(title);
}

[data-number="7"] span.primary:after {
    content: attr(title);
}

/* Number 6 */

[data-number="6"] span.primary:before {
    content: "6";
}

[data-number="6"] span.secondary:after {
    content: "6";
}

[data-number="6"] span.secondary:before {
    content: attr(title);
}

[data-number="6"] span.primary:after {
    content: attr(title);
}

/* Number 5 */

[data-number="5"] span.primary:before {
    content: attr(title);
}

[data-number="5"] span.secondary:after {
    content: attr(title);
}

[data-number="5"] span.secondary:before {
    content: attr(title);
}

[data-number="5"] span.primary:after {
    content: attr(title);
}

/* Number 4 */

[data-number="4"] span.primary:before {
    content: "4";
}

[data-number="4"] span.secondary:after {
    content: "4";
}

[data-number="4"] span.secondary:before {
    content: attr(title);
}

[data-number="4"] span.primary:after {
    content: attr(title);
}

/* Number 3 */

[data-number="3"] span.primary:before {
    content: attr(title);
}

[data-number="3"] span.secondary:after {
    content: attr(title);
}

[data-number="3"] span.secondary:before {
    content: attr(title);
}

[data-number="3"] span.primary:after {
    content: attr(title);
}

/* Number 2 */

[data-number="2"] span.primary:before {
    content: "2";
}

[data-number="2"] span.secondary:after {
    content: "2";
}

[data-number="2"] span.secondary:before {
    content: attr(title);
}

[data-number="2"] span.primary:after {
    content: attr(title);
}

/* Number 1 */

[data-number="1"] span.primary:before {
    content: "1";
}

[data-number="1"] span.secondary:after {
    content: "1";
}

[data-number="1"] span.secondary:before {
    content: attr(title);
}

[data-number="1"] span.primary:after {
    content: attr(title);
}