body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    background-color: #f0f0f8; /* pastel lightest */
    color: #333; /* text primary */
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.6;
}

header {
    background-color: #a39bff; /* pastel medium */
    color: #fff; /* white */
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

header h1 {
    margin-bottom: 5px;
    font-size: 2.5em;
    font-weight: bold;
}

.container {
    padding: 30px 20px;
    flex-grow: 1;
    max-width: 1000px;
    margin: 0 auto;
}

.section {
    background-color: #e6e6fa; /* pastel light */
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.section h2 {
    color: #7c6aff; /* pastel dark */
    margin-top: 0;
    margin-bottom: 20px;
    border-bottom: 3px solid #d0bff7; /* pastel medium light */
    padding-bottom: 10px;
    font-size: 2em;
    font-weight: bold;
}

.section h3 {
    color: #8e7bff; /* accent color */
    margin-top: 25px;
    margin-bottom: 15px;
    font-size: 1.6em;
    font-weight: bold;
}

.section p {
    margin-bottom: 15px;
    line-height: 1.7;
}

.section ul {
    padding-left: 25px;
    margin-bottom: 15px;
    list-style-type: disc;
}

.section li {
    margin-bottom: 8px;
}

.image-container {
    text-align: center;
    margin-bottom: 20px;
}

.image-container img {
    max-width: 50%;
    max-height: 15%;
    border-radius: 8px;
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
}

footer {
    background-color: #a39bff; /* pastel medium */
    color: #fff; /* white */
    padding: 20px;
    text-align: center;
    margin-top: auto;
    box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.1);
}

footer p {
    margin: 8px 0;
    font-size: 0.95em;
}

footer a {
    color: #fff; /* white */
    text-decoration: none;
    transition: text-decoration 0.3s ease;
}

footer a:hover {
    text-decoration: underline;
}

.code-example {
    background-color: #f0f0f8; /* pastel lightest */
    border: 1px solid #d0bff7; /* pastel medium light */
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
    font-family: monospace;
    white-space: pre-wrap;
    overflow-x: auto;
}