.canvas {
    width: 100%;
    height: 100%;
}
.editor {
    height: 100%;
    overflow: hidden;
}
.editor>img {
    display: block;
    max-width: 100%;
    max-height: 100%;
    margin: auto;
    vertical-align: middle;
}
.toolbar {
    position: absolute;
    left: 50%;
    bottom: 16px;
    z-index: 2015;
    width: 256px;
    height: 32px;
    margin-left: -128px;
    color: #fff;
}
.toolbar__button {
    float: left;
    display: block;
    width: 32px;
    height: 32px;
    border-width: 0;
    font-size: 14px;
    text-align: center;
    background-color: transparent;
    color: #fff;
    cursor: pointer;
}