.hero {
    background-image: url('../img/bg.jpg');
}

.index-img {
    background-image: url('../img/img2.png');
}

#top-button {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    border: none;
    outline: none;
    background-color: #52ab49;
    color: white;
    cursor: pointer;
    padding: 10px;
    border-radius: 50%;
    font-size: 18px;
}

#top-button:hover {
    background-color: #2e7627;
}