/* CONTROLS */
#controls {
    position: fixed;
    bottom: 0;
    max-width: 720px;
    width: 100%;
    padding: 10px 0;
    text-align: center;
}

.control-button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 0 20px;
    cursor: pointer;
    border-radius: 5px;
}