body{text-align: center;}

body > * {margin:20px auto;}

h1{
    margin: 0 auto;
    padding-bottom: 10px;
    padding-top: 10px;
    width: 840px;
    font-size: 3rem;
    font-family: "Mountains of Christmas";
   /* Permalink - use to edit and share this gradient: https://colorzilla.com/gradient-editor/#d80404+0,e26404+15,ede500+30,03e500+45,00e0d8+60,0007d3+75,66004e+90 */
    background: #d80404; /* Old browsers */
    background: -moz-linear-gradient(left,  #d80404 0%, #e26404 15%, #ede500 30%, #03e500 45%, #00e0d8 60%, #0007d3 75%, #66004e 90%); /* FF3.6-15 */
    background: -webkit-linear-gradient(left,  #d80404 0%,#e26404 15%,#ede500 30%,#03e500 45%,#00e0d8 60%,#0007d3 75%,#66004e 90%); /* Chrome10-25,Safari5.1-6 */
    background: linear-gradient(to right,  #d80404 0%,#e26404 15%,#ede500 30%,#03e500 45%,#00e0d8 60%,#0007d3 75%,#66004e 90%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#d80404', endColorstr='#66004e',GradientType=1 ); /* IE6-9 */
}
canvas {
    margin:0 auto;
    background-color: white;
}

nav {margin: 25px;}

.penSize,
.penColor{
    width:40px;
    height: 40px;
    background-color: white;
    display: inline-block;
    border-radius: 50%;
}
.penSize{
    border: 0;
    background-color: black;
}
.penColor{
    border:3px solid white;
    box-shadow: inset -2px 2px 4px black;
    height: 40px;
    line-height: 3;
}
.hidden{display: none}

.black{background-color: black;}
.maroon{background-color: #5C2121;}
.red{background-color: #B9121B;}
.yellow{background-color: #FFBD07;}
.green{background-color: #13B813;}
.seagreen{background-color: #029E9A;}
.blue{background-color: #0378A6;}

.penSize:after{
    content : "";
    border: 0;
    display: block;
    border-bottom:5px solid white;
}
.size1:after{
    padding-top:15px;
    border-width: 1px;
}
.size5:after{
    padding-top:10px;
    border-width: 5px;
}
.size10:after{
    padding-top:7px;
    border-width: 10px;
}
.size20:after{
    padding-top:3px;
    border-width: 20px;
}

section#toolbox {
    background: black;
    padding: 10px;
}
.rubber {
    cursor: crosshair;
}