@import url(https://fonts.googleapis.com/css?family=Open+Sans);
@import url(https://fonts.googleapis.com/css?family=Federo);

body {
    /* general styles */
    font-family: 'Open Sans', sans-serif;
    background: #ffffff;
    color: #000000;
}

/* overlay styles, all needed */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background-color: rgba(0,0,0,0.5);
    z-index: 10;
}

/* just some content with arbitrary styles for explanation purposes */
.modal {
    width: 300px;
    height: 288px;
    line-height: 25px;
    position: fixed;
    top: 50%; 
    left: 50%;
    margin-top: -150px;
    margin-left: -150px;
    background-color: #ffffff;
    border-radius: 5px;
    text-align: center;
    z-index: 11; /* 1px higher than the overlay layer */
}

.content {
    margin: 30px;
}

h1 {
    font-family: 'Open Sans', sans-serif;
}

.responsive {
  max-width: 100%;
  height: auto;
}