body, html {
    margin: 0;
    padding: 0;
}

.bg-container {
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background: url("../gif/flex.gif");
    background-size: 10vw 20vh;
}

@media (max-width:480px)  {
    .bg-container {
        background-size: 25vw 12.5vh;
    }
}

#menu {
    position: absolute;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24pt;
    color: white;
    background-color: rgba(0,0,0,0.8);
}


#menu span {
    cursor: pointer;
}

#menu span:hover {
    color: aqua;
}

#footer {
    position: absolute;
    bottom: 15px;
    left: 15px;
    color: white;
    text-shadow: -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000, 1px 1px 0 #000;
    font-weight: bold;
}