:root {
    --header-footer-bg: #212529;
    --content-bg: #ffffff;
    --primary-blue: #2E74B5; /* Blue color from screenshot */
    --text-color: #000000; /* Black text from screenshot */
    --border-color: #dee2e6;
}

html, body {
    height: 100%; 
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', sans-serif;
    background-color: #e9ecef;
}

body {
    display: flex;
    flex-direction: column;
    color: var(--text-color);
}

header {
    background-color: var(--header-footer-bg);
    padding: 20px 0;
    text-align: center;
}

header h1 {
    color: #FFFFFF;
    margin: 0;
}

#content-layout {
    display: flex;
    justify-content: center;
    width: 100%;
    flex-grow: 1;
}

#main-content {
    width: 100%;
    max-width: 960px;
    padding: 20px;
    box-sizing: border-box;
    background-color: var(--content-bg);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
}

/* --- Styles for Expandable Post --- */
.expandable-post {
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.post-title {
    background-color: #f8f9fa;
    padding: 15px;
    font-size: 1.2em;
    font-weight: bold;
    cursor: pointer;
    text-align: center;
    list-style: none;
}

.post-title::-webkit-details-marker {
    display: none;
}

.post-content {
    padding: 20px 25px;
    border-top: 1px solid var(--border-color);
    text-align: left;
}

/* --- Specific Content Styling (Matches Screenshot) --- */
.introduction-headline {
    font-family: 'Segoe UI', sans-serif;
    font-size: 10.5pt;
    font-weight: normal;
    color: var(--primary-blue);
    margin-bottom: 1em;
}

.introduction p {
    font-family: 'Segoe UI', sans-serif;
    font-size: 10.5pt;
    font-weight: normal;
    margin-bottom: 1em; /* Ensures space between paragraphs */
}

.subheading {
    font-family: 'Segoe UI', sans-serif;
    font-size: 10.5pt; /* Matches screenshot */
    font-weight: bold;
    text-transform: uppercase; /* Matches screenshot */
    color: var(--primary-blue); /* Matches screenshot */
    margin-top: 2em; /* Adds space above subheading */
    margin-bottom: 1em;
}

.main-body p {
    font-family: 'Segoe UI', sans-serif;
    font-size: 10.5pt; /* Matches screenshot */
    font-weight: normal;
    margin-bottom: 1em;
}

footer {
    background-color: var(--header-footer-bg);
    color: white;
    text-align: center;
    padding: 15px 0;
    width: 100%;
}

footer a {
    color: #ffffff;
    text-decoration: none;
}