html, body {
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.dhide {
    display: none !important;
}

.canvas {
    cursor: crosshair;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 1;
    transition: opacity .2s;
}

.canvas.white {
    opacity: 0;
}

.canvas.moving {
    cursor: move;
}

#canvas0 {
    z-index: 0;
}

#canvas1 {
    z-index: 1;
    pointer-events: none;
    opacity: 0.3;
}

.toolbar {
    position: fixed;
    left: 20px;
    top: 20px;
    background: #eee;
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0px 2px 2px 0px rgba(0, 0, 0, 0.1);
    display: flex;
    gap: 10px;
    z-index: 10;
    align-items: center;
}

.toolbar #brush-width {
    width: 7ch;
    height: 30px;
    padding: 5px;
    box-sizing: border-box;
    border: none;
    cursor: crosshair;
}

.toolbar #brush-color {
    padding: 0;
    height: 30px;
    width: 30px;
    border: none;
    cursor: pointer;
}

#brush-preview {
    border-radius: 50%;
    width: 5px;
    height: 5px;
    background: black;
    position: absolute;
    pointer-events: none;
    z-index: 11;
}

.toolbar #brush-color::-moz-color-swatch {
    border: none;
}