html, body, div, canvas {
    padding: 0px;
    margin: 0px;
    box-sizing: border-box;
}

#wrapper {
    display: flex;
    width: 100%;
    height: 100vh;
    flex-direction: row;
}

#buttons_div {
    display: flex;
    flex-direction: column;
    overflow-y: scroll;
}

#log_canvas {
    flex-grow: 1;
}

.active_button {
    background: #888;
    color: #FFF;
}