/* Collapsible Section Styles */
.collapsible-container {
    margin-bottom: 24px;
}

details.collapsible {
    background: #fff;
    border: 1px solid #dadce0;
    border-radius: 8px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: all 0.2s ease-in-out;
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
}

details.collapsible summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    cursor: pointer;
    list-style: none;
    background-color: #fff;
    transition: background-color 0.2s;
    user-select: none;
}

details.collapsible summary:hover {
    background-color: #f8f9fa;
}

/* Hide default marker */
details.collapsible summary::-webkit-details-marker {
    display: none;
}

details.collapsible summary h2,
details.collapsible summary h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 500;
    color: #202124;
    /* Google Grey 900 */
    letter-spacing: 0.1px;
}

/* Content Area */
details.collapsible .collapsible-content {
    padding: 0 24px 24px 24px;
    border-top: 1px solid transparent;
    transition: border-color 0.2s;
}

details.collapsible[open] summary {
    border-bottom: 1px solid #dadce0;
}

/* Material Icon Rotation */
details.collapsible summary .expand-icon {
    font-size: 24px;
    color: #5f6368;
    /* Google Grey 700 */
    transition: transform 0.3s ease;
}

details.collapsible[open] summary .expand-icon {
    transform: rotate(180deg);
}

/* Nested List Styling in HowTo */
details.collapsible .collapsible-content ol {
    padding-left: 20px;
    margin-top: 16px;
}

details.collapsible .collapsible-content li {
    margin-bottom: 12px;
    line-height: 1.6;
    color: #3c4043;
}