style.css

#xxx {
    /* background: green; */
    display: block;
    position: fixed;
    left: 0;
    top: 0;
}

* {
    margin: 0;
    padding: 0;
}

ul,
ol {
    list-style: none;
    margin: 0;
    padding: 0;
}


.icon {
    width: 1em;
    height: 1em;
    vertical-align: -0.15em;
    fill: currentColor;
    overflow: hidden;
}

.actions {
    position: fixed;
    left: 0;
    top: 0;
    padding: 15px;
}

.actions svg {
    width: 1.5em;
    height: 1.5em;
    transition: all 0.2s;
    margin: 0 5px;
}

.actions svg.active {
    fill: red;
    transform: scale(1.1);
}

.colors {
    position: fixed;
    top: 49px;
    left: 18px;
}

.colors>li {
    width: 20px;
    height: 20px;
    /* border: 1px solid red; */
    border-radius: 50%;
    box-shadow: 0px 0px 3px 0px rgba(0, 0, 0, 0.82);
    margin: 10px 0;
    transition: all 0.2s;
}

.colors>li.red {
    background: red;
}

.colors>li.green {
    background: green;
}

.colors>li.blue {
    background: blue;
}

.colors>li.black {
    background: black;
}

.colors>li.white {
    background: white;
    border: #666;
}


.colors>li.active {
    transform: scale(1.2);
}

.sizes {
    position: fixed;
    right: 10px;
    top: 20px;
}

.sizes>li {
    margin: 20px 0;
}

.sizes>.thin {
    height: 0;
    width: 20px;
    border-top: 4px solid black;
}

.sizes>.thick {
    height: 0;
    width: 20px;
    border-top: 9px solid black;
}

/* .actions>#brush {
    display: none;
}

.actions.x>#brush {
    display: inline-block;
}

.actions.x>#eraser {
    display: none;
} */