#drawing {
    border: 1px solid black;
    display: block;
    position: relative;
}

#drawing::after {
    content: "";
    opacity: 1;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    position: absolute;
    z-index: -1;
}

#drawing.grid {
    background-size: 10px 10px;
    background-image: linear-gradient(to right, grey 1px, transparent 1px), linear-gradient(to bottom, grey 1px, transparent 1px);
}

/* TOOLTIP */
.svg-tooltip {
    pointer-events: none;
    position: absolute;
    font-size: 18px;
    text-align: center;
    background: white;
    padding: 5px 5px;
    z-index: 5;
    /*height: 30px;*/
    min-width: 100px;
    line-height: 30px;
    margin: -5px auto;
    color: #21669e;
    display: none;
}
.svg-tooltip.svg-active {
    display: block;
}
/**********************/

/* RIGHT CLICK MENU */
.custom-menu {
    display: none;
    z-index: 1000;
    position: absolute;
    overflow: hidden;
    border: 1px solid #CCC;
    white-space: nowrap;
    font-family: sans-serif;
    background: #FFF;
    color: #333;
    list-style: none;
    padding:0;
    margin: 0;
}

.custom-menu li {
    padding: 8px 12px;
    cursor: pointer;
}

.custom-menu li:hover {
    background-color: #DEF;
}