body {
    margin: 0;
    display: flex;
    background-color: black;
    height: 100vh;
    padding: 0;
    overflow: hidden;
    font-family: 'Avenir Next Rounded Pro Medium';
}

#background {
    height: 100vh;
    max-width: 100vw;
    margin: auto;
}

#speaker {
    position: absolute;
    bottom: 30px;
    right: 30px;
    width: 5vw;
    transition: all 0.2s;
}

#speaker:hover {
    transform: scale(1.15);
}

.planet {
    position: absolute;
    width: 10vw;
    top: 5vh;
    transition: transform 0.5s;
}

.planet:hover {
    transform: scale(1.1);
}

#mars {
    right: 15vw;
}

#earth {
    left: 15vw;
}

#overlay {
    opacity: 0%;
    position:absolute;
    font-size: 1.3em;
    transform: translate(25%, -150%);
    padding: 5px 10px;
    border-radius: 5px;
    background-color: rgba(255, 255, 255, 0.8);
    transition: opacity 0.3s;
}

#book {
    width: 12vw;
    bottom: 1vh;
    right: 28vw;
    position: absolute;
    transition: transform 0.3s;
}

#book:hover {
    transform: scale(1.08);
}

#astronaute {
    position: absolute;
    border-radius: 50%;
    top: 31vh;
    left: 46vw;
    width: 15vw;
    height: 35vh;
}

#visu {
    position: absolute;
    width: 14vw;
    bottom: 8vh;
    right: 16vw;
    transition: transform 0.3s;
}

#visu:hover {
    transform: scale(1.08);
}