html {
    display: table;
    width: 100%;
    height: 100%;
}

body {
    display: table-row;
    background: #000 radial-gradient(1000px 500px, #3f546b, #000);
}

.wrapper {
    display: table-cell;
    vertical-align: middle;
    text-align: center;
}

.content {
    display: inline-block;
    width: 668px;
    margin: 0 auto;
    padding: 10px 20px;
}

.sidebar {
    float: left;
    margin-right: 20px;
    width: 220px;
    text-align: left;
    font-family: "Doppio One", sans-serif;
    color: #ccc;
}

h1, h2 {
    color: #fff;
    margin: 0;
    font-weight: normal;
}

h1 {
    height: 68px;
    line-height: 68px;
    font-size: 40px;
    text-align: right;
}

h2 {
    font-size: 18px;
}

.panel {
    padding: 12px;
    margin-bottom: 20px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
}

.dif-options {
    clear: both;
    overflow: hidden;
    margin: 20px -7px 0;
}

.dif-options div {
    float: left;
    width: 20%;
}

.dif-options input {
    display: none;
}

.dif-options input:checked+label {
    color: #fff;
    background-color: #593f6b;
    border-color: #fff;
    cursor: default;
}

.dif-options label {
    display: block;
    margin: 0 auto;
    width: 24px;
    height: 24px;
    background-color: #666;
    border: solid 2px #ccc;
    border-radius: 8px;
    color: #999;
    text-align: center;
    line-height: 24px;
    cursor: pointer;
}

.freeze .dif-options input:not(:checked)+label {
    font-size: 0;
    margin: 7px auto;
    width: 10px;
    height: 10px;
    border-radius: 4px;
    color: transparent;
    line-height: 10px;
    cursor: default;
    transition: .2s
}

.start {
    margin-top: 20px;
}

.start button {
    display: block;
    width: 100%;
    padding: 2px 12px 4px;
    font-family: inherit;
    font-size: 24px;
    border: solid 2px #ccc;
    border-radius: 8px;
    background-color: #593f6b;
    color: #fff;
    cursor: pointer;
}

.start button:focus {
    outline: none;
}

.freeze .start {
    display: none;
}

.info div {
    margin-top: 10px;
}

.board {
    position: relative;
    float: left;
    width: 428px;
    height: 428px;
    margin-top: 68px;
    background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/77020/board.png");
    box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.4);
}

.lit-columns, .lit-cells, .chips, .click-columns {
    position: absolute;
    width: 428px;
    height: 428px;
}

.lit-columns div {
    float: left;
    width: 60px;
    height: 426px;
    margin: 1px 0 1px 1px;
    transition: background-color 0.1s;
}

.lit-columns .lit {
    background-color: rgba(255, 255, 255, 0.1);
    transition: background-color 0.1s;
}

.lit-cells div {
    position: absolute;
    width: 60px;
    height: 60px;
    background-color: rgba(255, 255, 255, 0.3);
}

.chips div {
    position: absolute;
    width: 60px;
    height: 60px;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.chips .p1 {
    background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/77020/p1-chip.png");
}

.chips .p2 {
    background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/77020/p2-chip.png");
}

.chips .cursor {
    bottom: 428px;
    transition: left 0.1s ease-out;
}

.chips .dropped {
    transition: bottom ease-in;
    animation: bounce 0.3s;
}

.click-columns div {
    float: left;
    width: 61px;
    height: 428px;
}

.click-columns div:first-child {
    padding-left: 1px;
}

.click-columns .hover {
    cursor: pointer;
}

@keyframes bounce {
    0% {
        animation-timing-function: ease-out;
        transform: translateY(0);
    }

    30% {
        animation-timing-function: ease-in;
        transform: translateY(-40px);
    }

    60% {
        animation-timing-function: ease-out;
        transform: translateY(0);
    }

    80% {
        animation-timing-function: ease-in;
        transform: translateY(-10px);
    }

    100% {
        animation-timing-function: ease-out;
        transform: translateY(0);
    }
}