#theme-content-box {
    max-width: 900px;
    margin: 0 auto;
}

#canvas-box-panel {
    background-image: linear-gradient(45deg, #ddd 25%, transparent 25%), linear-gradient(-45deg, #ddd 25%, transparent 25%), linear-gradient(45deg, transparent 75%, #ddd 75%), linear-gradient(-45deg, transparent 75%, #ddd 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    display: flex;
    flex-wrap: wrap;
}

.options-panel button {
    background: #444499;
    cursor: pointer;
    width: 130px;
    justify-content: center;
    display: flex;
    align-items: center;
    padding: 10px 0;
    text-align: center;
    border-radius: 4px;
    font-size: 16px;
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s;
    border: none;
}

.options-panel select, input[type=text], input[type=number] {
    width: 100%;
    padding: 2px;
    border: none;
    outline: none;
    border-radius: 4px;
    box-shadow: 0 0 5px #aaa;
}

#canvas-box-panel img, #canvas-box-panel canvas {
    width: 100%;
}