/* Basic page styling */
body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f4f6ff;
    color: #222;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* Header */
header {
    background-color: #121826;
    color: #ffffff;
    padding: 20px;
    text-align: center;
}

h1 {
    font-size: 2.2em;
    margin-bottom: 10px;
}

.intro {
    max-width: 900px;
    margin: 0 auto;
}

/* Headings with different sizes and colors */
h2 {
    color: #0066cc;   /* blue */
    font-size: 1.8em;
}

h3 {
    color: #009966;   /* green */
    font-size: 1.4em;
}

/* Main content blocks */
.content-block {
    max-width: 900px;
    margin: 20px auto;
    padding: 20px;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
}

/* Images */
.center-image {
    display: block;
    margin: 10px auto 20px auto;
    max-width: 100%;
    height: auto;
}

/* Floated image for text wrapping */
.float-image {
    float: left;
    margin: 0 20px 10px 0;
    max-width: 230px;
    height: auto;
}

/* Right-aligned image */
.right-image {
    float: right;
    margin: 0 0 10px 20px;
    max-width: 260px;
    height: auto;
}

/* Clearfix for sections with floated images */
.clearfix::after {
    content: "";
    display: block;
    clear: both;
}

/* Lists & links */
ul, ol {
    margin-left: 30px;
}

a {
    color: #cc3300;   /* accent color */
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.links {
    margin-top: 10px;
}

/* Back-to-top link */
.back-to-top {
    text-align: right;
    font-size: 0.95em;
}

/* Horizontal rule */
hr {
    border: none;
    border-top: 2px solid #ccccff;
    margin: 0;
}

/* Footer */
footer {
    background-color: #121826;
    color: #f0f0f0;
    text-align: center;
    padding: 10px 0;
    font-size: 0.9em;
}