/* Module Sidebar Styles */
.module-sidebar {
    position: fixed;
    top: 110px;
    left: 0;
    width: 220px;
    height: calc(100vh - 110px);
    background: #f7fafd;
    border-right: 1px solid #e0e0e0;
    padding: 28px 12px 24px 28px;
    overflow-y: auto;
    z-index: 900;
    font-size: 1rem;
}

/* Heading styles */
.module-sidebar > h4 {
    margin-top: 0;
    color: #4a6fa5;
    font-size: 1.1rem;
    margin-bottom: 16px;
}

/* List styles */
.module-sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.module-sidebar li {
    margin-bottom: 8px;
}

/* Nested list styles */
.module-sidebar .h4-list {
    margin-left: 16px;
    margin-top: 8px;
    margin-bottom: 12px;
}

.module-sidebar .h4-item {
    margin-bottom: 6px;
}

/* Link styles */
.module-sidebar a {
    color: #333;
    text-decoration: none;
    padding: 6px 8px;
    border-radius: 4px;
    display: block;
    transition: background 0.2s, color 0.2s;
}

.module-sidebar a.active {
    background: rgba(74, 111, 165, 0.15);
    color: #4a6fa5;
    font-weight: bold;
}

/* H3 items styling */
.module-sidebar .h3-item > a {
    font-weight: 500;
    color: #4a6fa5;
}

.module-sidebar .h3-item > a.active {
    background: rgba(74, 111, 165, 0.15);
    color: #4a6fa5;
}

/* H4 items styling */
.module-sidebar .h4-item > a {
    color: #4a6fa5;
    font-size: 0.95em;
}

.module-sidebar .h4-item > a.active {
    background: rgba(74, 111, 165, 0.15);
    color: #4a6fa5;
}

/* No sections message */
.module-sidebar .no-sections {
    color: #666;
    font-size: 0.9em;
    padding: 8px;
    font-style: italic;
}

/* --- Content Layout (sidebar-related) --- */
.content-inner {
    padding-top: 10px; /* fallback for no-JS */
    margin-left: 300px; /* 220px sidebar + 80px gap */
    max-width: calc(85% - 220px - 80px);
    width: 85%;
}

@media (max-width: 900px) {
    .content-inner {
        margin-left: 0;
        max-width: 95%;
        width: 95%;
        padding-top: 10px;
    }
    .module-sidebar {
        display: none;
    }
}

@media (max-width: 600px) {
    .content-inner {
        padding-top: 10px;
    }
}