/* Web-safe font for all text */
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
}

/* Four-column layout */
.four-column-text {
    width: 100%;
    box-sizing: border-box;
    padding: 25px;
    
    column-count: 4;
    column-gap: 30px;
    
    border: 2px solid #333;
}

/* Paragraph formatting */
p {
    margin-top: 0;
    margin-bottom: 18px;
    line-height: 1.6;
    text-align: left;
}

/* History of CSS heading */
.history-title {
    font-family: "Roboto Slab", serif;
    font-size: 28px;
    margin-top: 0;
}

/* Difficulty with Adoption heading */
.adoption-title {
    font-family: "Playfair Display", serif;
    font-size: 28px;
}

/* Source and date */
.source {
    text-shadow: 2px 2px 3px #999;
    font-weight: bold;
}