body{
    background: url('./background.jpg') no-repeat;
    background-size: cover;
    text-align: center;
    background-position: center;
}

#btn-watch{
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
    padding: 10px 60px;
    text-decoration: none;
    background: #fff;
    border-radius: 40px;
    font-size: 50px;
    color: #2a366b;
    margin: 0 auto;
    position: absolute;
    bottom: 10%;
    font-weight: bold;
    transform: translate(-50%);

}