body {
    padding: 1em;
}

canvas {
    position: absolute;
    height: 100%;
    width: 100%;
}

#tank {
    position: relative;
    background-color: royalblue;
    padding: 0;
    height: 90vh;

    -webkit-box-shadow: 10px 10px 38px -15px rgba(0,0,0,0.92);
    -moz-box-shadow: 10px 10px 38px -15px rgba(0,0,0,0.92);
    box-shadow: 10px 10px 38px -15px rgba(0,0,0,0.92);
}

#controlpanel {
    height: 90vh;
    display:flex;
    flex-direction:column;
}

.controlpanel_slider {
    margin-bottom: 1em;
}


.slider {
    -webkit-appearance: none;  /* Override default CSS styles */
    appearance: none;
    width: 100%; /* Full-width */
    height: 15px;
    border-radius: 5px;
    background: #d3d3d3; /* Grey background */
    outline: none; /* Remove outline */
    opacity: 0.7; /* Set transparency (for mouse-over effects on hover) */
    -webkit-transition: .2s; /* 0.2 seconds transition on hover */
    transition: opacity .2s;
}

.slider:hover {
    opacity: 1; /* Fully shown on mouse-over */
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none; /* Override default look */
    appearance: none;
    width: 20px; /* Set a specific slider handle width */
    height: 20px;
    border-radius: 50%;
    background: royalblue; /* Green background */
    cursor: pointer; /* Cursor on hover */
}

.slider::-moz-range-thumb {
    width: 20px; /* Set a specific slider handle width */
    height: 20px;
    border-radius: 50%;
    background: royalblue; /* Green background */
    cursor: pointer; /* Cursor on hover */
}

.control_btn {
    padding:0.5em;
}

.controlpanel_checkboxes {
    font-size: 0.8em;
    line-height: 1.5em;
}

#controlpanel_log {
    flex:1;
    overflow-y: scroll;
}

.log-entry {
    margin-bottom: 0.5em;
    font-size: 0.7em;
}

.controlpanel_buttons {

}