#zkflip-container {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    background: #222;
    overflow: hidden;
    box-sizing: border-box;
    min-height: 0;
    min-width: 0;
    padding: 8px;
}
#zkflip-canvas {
    background: #AADDFF;
    border: 2px solid #E95FC8;
    border-radius: 8px;
    box-shadow: 0 0 16px #0008;
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    display: block;
    box-sizing: border-box;
}