* {
    margin: 0;
    padding: 0;
}

/* https://www.paulirish.com/2012/box-sizing-border-box-ftw/ */
html {
    -webkit-box-sizing: border-box;
       -moz-box-sizing: border-box;
            box-sizing: border-box;
}
*, *:before, *:after {
    -webkit-box-sizing: inherit;
       -moz-box-sizing: inherit;
            box-sizing: inherit;
}

/* Fancy checkboxes */
/* http://stackoverflow.com/questions/4148499/how-to-style-checkbox-using-css */
input[type='checkbox'] {
    display: none;
}
input[type='checkbox'] + label {
    position: relative;
    cursor: pointer;
}
input[type='checkbox'] + label > span {
    -webkit-box-sizing: content-box;
       -moz-box-sizing: content-box;
            box-sizing: content-box;

    display: inline-block;
    /* The text is not aligned exactly with the checkbox. */
    vertical-align: -2px;
    width: 16px;
    height: 16px;
    margin-right: 4px;
    color: rgb(245, 4, 3);
    text-shadow: -1px 1px 6px rgb(245, 4, 3),
                 1px -1px 6px rgb(245, 4, 3);
    background-color: #525252;
    text-align: center;
    cursor: pointer;

    border: 4px solid #3a3a3a;
    border-radius: 3px;
}
input[type='checkbox'] + label > span::before {
    content: '\2714';       /* Tick sign. */
    opacity: 0;
    /* The tick sign is not placed exactly in the center. */
    position: relative;
    top: -3px;
}
input[type='checkbox'] + label:hover > span::before {
    opacity: 0.6;
}
input[type='checkbox']:checked + label > span::before {
    opacity: 1;
}

/* http://stackoverflow.com/a/4407335/1751037 */
.no-select {
    -webkit-touch-callout: none;    /* iOS Safari */
      -webkit-user-select: none;    /* Chrome/Safari/Opera */
       -khtml-user-select: none;    /* Konqueror */
         -moz-user-select: none;    /* Firefox */
          -ms-user-select: none;    /* Internet Explorer/Edge */
              user-select: none;
    cursor: default;
}
.no-touch-action {
    -ms-touch-action: none;
        touch-action: none;
}

html, body, #supercold-canvas {
    width: 100%;
    height: 100%;
    overflow: hidden;               /* no scrollbar */
}
body {
    font-family: Helvetica, Arial;
    color: rgb(230, 251, 255);
    text-shadow: 0px -1px 8px rgba(230, 251, 255, 1),
                 0px  1px 8px rgba(230, 251, 255, 1),
                -1px  0px 4px rgba(245, 4, 3, 0.275),
                 1px  0px 4px rgba(220, 250, 255, 1);
    background-color: rgb(10, 10, 10);
}
a {
    color: rgb(235, 251, 255);
    text-decoration: none;
}
button {
    margin: 4px 0;
    padding: 3px 40px;

    font-size: 1.15em;
    color: rgb(235, 251, 255);
    text-shadow: -1px 0 4px rgb(230, 251, 255),
                  1px 0 4px rgb(230, 251, 255);

    background-color: rgb(34, 34, 34);
    background: -webkit-linear-gradient(top, rgb(70, 70, 70), rgb(34, 34, 34));
    background:    -moz-linear-gradient(top, rgb(70, 70, 70), rgb(34, 34, 34));
    background:     -ms-linear-gradient(top, rgb(70, 70, 70), rgb(34, 34, 34));
    background:      -o-linear-gradient(top, rgb(70, 70, 70), rgb(34, 34, 34));
    background:   linear-gradient(to bottom, rgb(70, 70, 70), rgb(34, 34, 34));

    border: 2px solid rgb(34, 34, 34);
    border-radius: 6px;

    -webkit-box-shadow: 0 0 5px 1px rgb(70, 70, 70);
            box-shadow: 0 0 5px 1px rgb(70, 70, 70);

    -webkit-transition-duration: 0.2s;
       -moz-transition-duration: 0.2s;
         -o-transition-duration: 0.2s;
            transition-duration: 0.2s;
}
button:hover {
    color: rgb(34, 34, 34);
    text-shadow: -1px 0 2px rgb(34, 34, 34),
                  1px 0 2px rgb(34, 34, 34);

    background-color: rgb(245, 4, 3);
    background: -webkit-linear-gradient(top, rgb(245, 30, 30), rgb(245, 4, 3));
    background:    -moz-linear-gradient(top, rgb(245, 30, 30), rgb(245, 4, 3));
    background:     -ms-linear-gradient(top, rgb(245, 30, 30), rgb(245, 4, 3));
    background:      -o-linear-gradient(top, rgb(245, 30, 30), rgb(245, 4, 3));
    background:   linear-gradient(to bottom, rgb(245, 30, 30), rgb(245, 4, 3));

    border: 2px solid #f44336;

    -webkit-box-shadow: 0 0 5px 1px rgb(245, 4, 3);
            box-shadow: 0 0 5px 1px rgb(245, 4, 3);
}

#supercold {
    font-size: 1.75em;
    font-weight: lighter;

    color: rgb(235, 251, 255);
    text-shadow: 0px -1px 6px rgba(220, 251, 255, 1),
                 0px  1px 6px rgba(220, 251, 255, 1),
                -1px  0px 4px rgba(245, 4, 3, 0.225),
                 1px  0px 4px rgba(220, 250, 255, 1);
}
#supercold span {
    text-shadow: 0px  0px 6px rgba(220, 251, 255, 1),
                 0px -1px 6px rgba(220, 251, 255, 1),
                 0px  1px 6px rgba(220, 251, 255, 1),
                -1px  0px 4px rgba(245, 4, 3, 0.725),
                 1px  0px 4px rgba(220, 251, 255, 1);
}
#superhot {
    cursor: pointer;
    font-size: 1.4em;
    border-bottom: 1px dotted rgba(245, 4, 3, 0.5);
    color: rgb(245, 4, 3);
    text-shadow: -1px 1px 6px rgb(245, 4, 3),
                 1px -1px 6px rgb(245, 4, 3);
}
#superhot span {
    text-shadow: 0px 0px 4px rgb(245, 4, 3),
                -1px 1px 4px rgb(245, 4, 3),
                1px -1px 4px rgb(245, 4, 3);
}
#supercold, #superhot {
    font-weight: normal;
}
#supercold span, #superhot span {
    font-weight: bold;
}
#description strong {
    display: block;
}
#instructions {
    line-height: 1.25;
}
#instructions .superhotkey {
    color: rgb(245, 4, 3);
    text-shadow: 0px  0px 3px rgb(245, 4, 3),
                -1px  1px 5px rgb(245, 4, 3),
                 1px -1px 5px rgb(245, 4, 3);
}
#center {
    position: fixed;
    left: 50%;
    top: 50%;
    -webkit-transform: translate(-50%, -50%);
       -moz-transform: translate(-50%, -50%);
        -ms-transform: translate(-50%, -50%);
         -o-transform: translate(-50%, -50%);
            transform: translate(-50%, -50%);

    min-width: 704px;
    text-align: center;
    padding: 0.75em 1em;
    border-radius: 8px;

    background-color: rgba(40, 40, 40, 0.925);
    background: -webkit-radial-gradient(rgba(40, 40, 40, 0.925), rgba(16, 16, 16, 0.925));
    background:    -moz-radial-gradient(rgba(40, 40, 40, 0.925), rgba(16, 16, 16, 0.925));
    background:     -ms-radial-gradient(rgba(40, 40, 40, 0.925), rgba(16, 16, 16, 0.925));
    background:      -o-radial-gradient(rgba(40, 40, 40, 0.925), rgba(16, 16, 16, 0.925));
    background:         radial-gradient(rgba(40, 40, 40, 0.925), rgba(16, 16, 16, 0.925));

    -webkit-box-shadow: 0 0 6px 1px rgb(24, 24, 24);
            box-shadow: 0 0 6px 1px rgb(24, 24, 24);
}
#panes {
    display: table;
    border-spacing: 0.75em;
}
.pane {
    display: table-cell;
    vertical-align: middle;
}
#mutator-pane {
    font-size: 0.95em;
}
.pane div {
    margin: 4px 0;
}
#mutator-pane div {
    margin: 2px 0;
}
#mutators {
    display: inline-block;
    text-align: left;
}
#start {
    cursor: pointer;
    margin-top: 0.4em;
}
.locked10, .locked20, .locked30, .locked40, .locked50, .locked75, .locked100 {
    display: none;
}
#more {
    position: fixed;
    top: 0;
    left: 0;
    padding: 4px 8px;

    background-color: rgba(40, 40, 40, 0.75);
    border-bottom-right-radius: 6px;

    -webkit-box-shadow: 0 0 6px 1px rgb(128, 128, 128);
            box-shadow: 0 0 6px 1px rgb(128, 128, 128);
}
#bottom {
    position: fixed;
    bottom: 0;
    right: 0;
    padding: 4px 8px;

    font-size: 0.96em;
    background-color: rgba(40, 40, 40, 0.75);
    border-top-left-radius: 6px;

    -webkit-box-shadow: 0 0 5px 1px rgb(128, 128, 128);
            box-shadow: 0 0 5px 1px rgb(128, 128, 128);
}
#top {
    position: fixed;
    top: 4px;
    right: 4px;
}
#top a {
    /* Hide text of FB share and Twitter buttons until the plugins have loaded. */
    color: rgb(10, 10, 10);
    text-shadow: none;
}
#top > div {
    vertical-align: top;
    /* Override default FB display style for mobile. */
    display: inline-block;
}
#top > iframe {
    /* Use this instead of frameborder=0. */
    border: none;
}

#tips, #hint {
    display: none;
    pointer-events: none;
    position: fixed;
    left: 0;
    width: 100%;
    text-align: center;
    font-size: 1.5em;
    color: rgb(245, 251, 255);
    text-shadow: 0 -1px 7px rgba(242, 251, 255, 1),
                 0  1px 7px rgba(242, 251, 255, 1);
}
#tips {
    top: 13%;
}
#hint {
    bottom: 13%;
}
@media (min-width: 550px) {
    #tips, #hint {
        font-size: 2em;
    }
}
@media (min-width: 768px) {
    #tips, #hint {
        font-size: 2.5em;
    }
}
.tip {
    display: none;
}