body {
    margin: 0;
    padding: 0;
    background-color: lightgray;
    scroll-behavior: smooth;
    font-family: Arial, Helvetica, sans-serif;
}

h1,
h2,
h3 {
    margin: 0;
    padding: 10px;
}

.mainDiv {
    max-width: 1024px;
    height: auto;
    margin: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    background-color: #fff;
}

.mainImage {
    width: 100%;
    height: auto;
}