body {
    margin: 0;
    padding: 0;
    font-family: 'Open Sans', Fallback, sans-serif;
    overflow-wrap: break-word;
    -webkit-text-size-adjust: none;
    -moz-text-size-adjust: none;
    -ms-text-size-adjust: none;
    text-size-adjust: none;
    background-color: #f2f2f2;
    width: 80%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
}

h1 {
    color: #003366;
    font-size: 2.0em;
    margin-bottom: 20px;
    border-bottom: 1px solid #ccc;
    padding-bottom: 10px;
}

h2 {
    color: #0099cc;
    font-size: 2.0em;
    margin-bottom: 20px;
}

h3 {
    color: #cc3300;
    font-size: 1.75em;
    margin-bottom: 20px;
}

p, ul {
    font-size: 1.2em;
    color: #4d4d4d;
    line-height: 1.6;
    text-align: justify;
    margin-bottom: 20px;
}

.image-container {
    margin: 20px auto;
    width: 300px;
    height: 300px;
    background-color: #ddd;
    padding: 30px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
}

img.kidneys {
    max-width: 100%;
    max-height: 100%;
}

h1:last-child {
    border-bottom: none;
}

body::after {
    content: '';
    display: block;
    width: 100%;
    height: 1px;
    background-color: #ccc;
    margin-top: 20px;
}

body::before {
    content: '';
    display: block;
    width: 100%;
    height: 1px;
    background-color: #ccc;
    margin-bottom: 20px;
}