body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: Arial;
}

main {
    flex: 1;
    display: flex;
    padding: 20px;
    gap: 20px;
    width: 60%;
    margin: 0 auto;
    align-items: center;
}

.content-left,
.content-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    text-align: justify;
    padding: 20px;
}

div p {
    line-height: 1.25;
    font-size: 1.125em;
}

h1 #heading-first {
    font-size: 1.5em;
}

h1 #heading-last {
    color: #007bff;
    font-size: 2em;
}

.highlight-box {
    background-color: #efefef;
    border-left: 4px solid #007bff;
    padding: 10px 30px;
    border-radius: 4px;
}