body {
    margin: 0;
    padding: 0;
    background-color: #cccccc;
    font-family: arial;
    padding: 0 25%;
    display: flex;    
    justify-content: center;
    align-items: center;
    height: 100vh;
    box-sizing: border-box;
    overflow: hidden;
    flex-direction: column;
    color: #777;
}

p {
    font-size: 0.8rem;
    text-align: center;
}

.anim-zone {
    background-color: #fff;
    border-radius: 6px;    
    width: 100%;
    overflow: hidden;
    margin-bottom: 15px;
}

img {
    width: 100%;
    display: block;
}

.ball {
    width: 80px;
    height: 80px;
    position: absolute;
    top: 10px;
    left: 10px;
    border-radius: 50%;
    background-color: #ffffff;
    opacity: 0.2;
    display: flex;    
    justify-content: center;
    align-items: center;
    font-size: 0.5em;
}

#zone2 .ball {
    width: 60px;
    height: 60px;    
    background-color: #000000;
}