.game-started .dark-overlay {
    display: none
}

.game-started #play-button {
    display: none
}

.dark-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.25);
    z-index: 999
}

#play-button {
    max-height: 30dvh;
    max-width: 30dvw;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1000;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent
}

html, body {
    height: 100%;
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    background-color: #999797;
}

#game-field {
    display: block;
    background-color: white;
    width: 95dvmin;
    height: 95dvmin;
    z-index: 3;
    touch-action: none
}