body { font-family: Arial, sans-serif; line-height: 1.6; max-width: 800px; margin: 20px auto; padding: 20px; }
h1 { 
    color: var(--heading-color, #333); 
    text-align: center; /* Center the page title */
}
a { text-decoration: none; color: var(--link-color, #007BFF); }
a:hover { text-decoration: underline; }

/* List and category styles */
h2.category-title { 
    color: var(--heading-color, #0056b3); 
    margin-top: 30px; 
    margin-bottom: 15px; 
    font-size: 1.4em; 
}

/* Modern card grid */
ul.category-list, ul.simple-list { 
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    list-style: none !important;
    padding-left: 0 !important;
    margin-top: 15px;
    margin-bottom: 40px;
}

ul.category-list li, ul.simple-list li { 
    margin: 0;
    padding: 0;
}

/* Styling links as modern interactive cards */
ul.category-list li a, ul.simple-list li a {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    background-color: var(--card-bg, #f8f9fa);
    border: 1px solid var(--card-border, #e9ecef);
    border-radius: 12px;
    color: var(--link-color);
    text-decoration: none;
    font-weight: 500;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    height: 100%;
    line-height: 1.4;
    box-sizing: border-box;
}

/* Custom indicator before the link text */
ul.category-list li a::before, ul.simple-list li a::before {
    content: "›";
    font-size: 1.6em;
    margin-right: 15px;
    color: var(--link-color);
    transition: transform 0.2s ease;
    padding-bottom: 4px;
}

/* Hover effects for cards */
ul.category-list li a:hover, ul.simple-list li a:hover {
    background-color: var(--card-bg-hover, #ffffff);
    border-color: var(--link-color);
    transform: translateY(-4px);
    box-shadow: 0 8px 20px var(--shadow-color, rgba(0,0,0,0.1));
    color: var(--link-hover-color, #004494);
    text-decoration: none;
}

ul.category-list li a:hover::before, ul.simple-list li a:hover::before {
    transform: translateX(5px);
    color: var(--link-hover-color, #004494);
}

/* Collapsible Course Metadata (styled similarly to modern cards) */
.course-metadata-details {
    margin-top: 30px; 
    margin-bottom: 20px;
    padding: 16px 20px; /* Match standard card padding */
    border: 1px solid var(--card-border, #e9ecef); /* Match card border */
    border-radius: 12px; /* Match card radius */
    background-color: var(--card-bg, #f8f9fa); /* Match card background */
    font-size: 0.9em; 
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

/* Match hover effect of other cards */
.course-metadata-details:hover {
    background-color: var(--card-bg-hover, #ffffff);
    border-color: var(--link-color);
    box-shadow: 0 8px 20px var(--shadow-color, rgba(0,0,0,0.1));
}

.course-metadata-details summary {
    font-weight: 500;
    color: var(--link-color); /* Matches clickable links */
    font-size: 1.1em;
    margin-bottom: 0;
    cursor: pointer;
    list-style: none; /* Hide default arrow */
    display: flex;
    align-items: center;
    justify-content: center; /* Center the text horizontally */
    transition: color 0.2s ease;
}

.course-metadata-details:hover summary {
    color: var(--link-hover-color);
}

.course-metadata-details summary::-webkit-details-marker {
    display: none;
}

/* Interactive custom arrow on the right, pointing down by default */
.course-metadata-details summary::after {
    content: "›";
    font-size: 1.6em;
    margin-left: 10px; /* Add space to the left of the arrow */
    color: inherit;
    transform: rotate(90deg); /* Point downwards initially */
    transition: transform 0.2s ease;
    padding-bottom: 4px;
    display: inline-block; 
}

/* Rotate arrow when opened to point upwards */
.course-metadata-details[open] summary::after {
    transform: rotate(-90deg);
}

.course-metadata-details[open] summary {
    margin-bottom: 16px;
}

.course-metadata-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 12px;
}

.course-metadata-list li {
    background: var(--bg-color, #ffffff);
    padding: 12px;
    border-radius: 8px; /* Slightly smaller radius for nested items */
    border: 1px solid var(--border-color, #eee);
    font-size: 0.95em;
    display: flex;
    flex-direction: column;
}

.course-metadata-list li span {
    font-weight: bold;
    color: var(--heading-color, #0056b3);
    margin-top: 4px;
}

.course-metadata-video {
    margin-top: 15px;
    position: relative;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    border-radius: 8px;
}

.course-metadata-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* ====================================================
   ANNOUNCEMENT SUMMARIES
   Arrow on the FAR RIGHT, pointing down, rotates up.
   ==================================================== */

summary.announcement-summary { 
    color: var(--text-color) !important; 
    font-size: 1.15em; 
    font-weight: normal; 
    margin-top: 25px; 
    margin-bottom: 10px; 
}

details[open] summary.announcement-details { border-bottom-color: #0056b3; }

.announcement-details-body { 
    padding-left: 15px; 
    border-left: 3px solid #f4f4f4; 
    margin-top: 10px;
}

summary[class="announcement-summary"] { 
    display: flex; 
    align-items: center;
    justify-content: space-between;
    padding: 10px 15px;
    margin-left: -15px; 
    margin-right: -15px;
    border-radius: 8px;
    transition: background-color 0.2s ease, color 0.2s ease; 
}

/* Custom downward arrow pushed to the far right */
summary[class="announcement-summary"]::after {
    content: '';
    display: inline-block;
    flex-shrink: 0;
    margin-left: 15px;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid currentColor;
    transition: transform 0.2s ease;
}

/* Rotate arrow upwards when open */
details[open] > summary[class="announcement-summary"]::after {
    transform: rotate(180deg);
}

/* Visual feedback on hover */
summary[class="announcement-summary"]:hover { 
    color: #003d82; 
    background-color: rgba(0, 123, 255, 0.08);
}

/* ====================================================
   ALL ANNOUNCEMENTS LINK (Classic Clean Button)
   ==================================================== */
.all-announcements-link {
    display: flex;
    justify-content: flex-end; /* Aligns the button to the right */
    margin-top: 25px;
    margin-bottom: 15px;
}

.all-announcements-link a {
    display: inline-flex;
    align-items: center;
    background: var(--card-bg); 
    color: var(--text-color) !important; /* Matches the blue color of the navigation cards */
    border: 1px solid var(--card-border); 
    padding: 8px 20px; 
    border-radius: 8px; 
    font-size: 0.95em;
    font-weight: 500;
    transition: all 0.2s ease; 
    text-decoration: none; 
    box-shadow: 0 2px 4px var(--shadow-color);
}

/* Hover effect: slight lift and shadow increase */
.all-announcements-link a:hover {
    background: var(--card-bg-hover); 
    border-color: var(--link-color);
    transform: translateY(-2px); 
    box-shadow: 0 4px 8px var(--shadow-color);
    color: var(--link-hover-color) !important;
}

/* Force removal of any pseudo-element arrows added previously */
.all-announcements-link a::before,
.all-announcements-link a::after {
    content: none !important;
}