html {
    height: 100%;
}

body {
    margin: 0;
    padding: 0;
    color: rgba(255, 255, 255, 0.87);
    background-color: #000000;
    height: 100%;
}

#app {
    width: 100%;
    height: 100%;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

button {
    background-color: transparent;
    border: none;
    width: 100px;
    height: 100px;
    outline-color: rgba(0 0 0 0.5)
}

/* @media screen and (max-width: 500px) { */
button {
    width: 70px;
    height: 70px;
}

button img {
    transform: scale(0.7);
}


button img {
    opacity: 0.35;
}

@media (hover: hover) {
    button:hover img {
        opacity: 0.5;
    }
}

button:active {
    opacity: 0.8;
}

#button-info {
    position: absolute;
    left: 0;
    top: 0;
}

#button-sound {
    position: absolute;
    right: 0;
    top: 0;
}