/* Style HTML tags */
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

/* ID selector */
#main-title {
    color: #333;
    /* Box model properties */
    padding: 20px;
    margin-bottom: 10px;
}

/* Class selector (used multiple times) */
.description {
    color: #666;
    font-size: 16px;
}

.subtitle {
    color: #777;
    font-style: italic;
}

/* Div sections styling */
.header {
    background-color: #4CAF50;
    color: white;
    text-align: center;
    /* Box model properties */
    padding: 50px 20px;
    margin-bottom: 20px;
}

.content {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background: white;
}

/* Link hover effect */
a {
    color: #4CAF50;
    text-decoration: none;
}

a:hover {
    color: #45a049;
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px 0;
}