.example_headline {
    margin-top: 20px;
    text-align: center;

}

#examples_block h3 {
    color: black;
}

.example_headline a {
    font-size: 40px;
}

.example_block {
    margin: 10px auto auto auto;
    width: 90%;
    text-align: center;
    font-size: 20px;
    color: white;
    border-bottom: 5px solid;
    border-image-slice: 0.5;
    border-image-source: radial-gradient(darkblue 75%, white 85%);
}

.example_block > img {
    width: 100%;
}

.example_block h3 {
    margin-top: 10px;
}

#examples_block {
    margin: auto;
    text-align: center;
}

#myBtn {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    font-size: 30px;
    border: none;
    outline: none;
    background-color: darkblue;
    color: white;
    cursor: pointer;
    padding: 15px;
    border-radius: 4px;
}

#myBtn:hover {
    background-color: royalblue;
}