.help-sidebar-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1024;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.help-sidebar-backdrop.open {
    opacity: 1;
}

.help-sidebar {
    position: fixed;
    top: 56px;
    right: 0;
    bottom: 0;
    width: 400px;
    z-index: 1025;
    background: var(--bs-body-bg, #fff);
    color: var(--bs-body-color, #212529);
    border-left: 1px solid var(--bs-border-color, #dee2e6);
    box-shadow: -4px 0 12px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.help-sidebar.open {
    transform: translateX(0);
}

/* Viewport compact mode (40px navbar) */
.viewport-compact .help-sidebar {
    top: 40px;
}

/* Viewport narrow mode (36px navbar) */
.viewport-narrow .help-sidebar {
    top: 36px;
}

/* Impersonation banner offset (34px) */
.impersonating .help-sidebar {
    top: 90px;
}

.impersonating.viewport-compact .help-sidebar {
    top: 74px;
}

.impersonating.viewport-narrow .help-sidebar {
    top: 70px;
}

.help-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--bs-border-color, #dee2e6);
    flex-shrink: 0;
}

.help-sidebar-header h5 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.help-sidebar-body {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.help-sidebar-footer {
    border-top: 1px solid var(--bs-border-color, #dee2e6);
    padding: 0.75rem 1rem;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Search input */
.help-search-input {
    position: relative;
    margin-bottom: 1rem;
}

.help-search-input i {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--bs-secondary-color, #6c757d);
}

.help-search-input input {
    padding-left: 2.25rem;
}

/* Article list */
.help-article-item {
    display: block;
    padding: 0.625rem 0.75rem;
    margin-bottom: 0.25rem;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: background-color 0.15s ease;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    color: var(--bs-body-color, #212529);
}

.help-article-item:hover {
    background-color: var(--bs-tertiary-bg, #f8f9fa);
}

.help-article-item .article-title {
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 0.125rem;
}

.help-article-item .article-excerpt {
    font-size: 0.8rem;
    color: var(--bs-secondary-color, #6c757d);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.help-article-item .article-category {
    font-size: 0.75rem;
    color: var(--bs-secondary-color, #6c757d);
}

/* Category list */
.help-category-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.625rem 0.75rem;
    margin-bottom: 0.25rem;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: background-color 0.15s ease;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    color: var(--bs-body-color, #212529);
}

.help-category-item:hover {
    background-color: var(--bs-tertiary-bg, #f8f9fa);
}

.help-category-item .category-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.help-category-item .category-count {
    font-size: 0.75rem;
    color: var(--bs-secondary-color, #6c757d);
}

/* Article view */
.help-article-content {
    line-height: 1.6;
    font-size: 0.9rem;
}

.help-article-content h1,
.help-article-content h2,
.help-article-content h3 {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

.help-article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 0.375rem;
}

.help-article-content pre {
    background: var(--bs-tertiary-bg, #f8f9fa);
    padding: 0.75rem;
    border-radius: 0.375rem;
    overflow-x: auto;
}

/* Video embed */
.help-video-embed {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

.help-video-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* Section headers */
.help-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--bs-secondary-color, #6c757d);
    margin-bottom: 0.5rem;
    padding: 0 0.75rem;
}

/* Back button */
.help-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    background: none;
    border: none;
    padding: 0.25rem 0;
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
    color: var(--bs-primary, #0d6efd);
    cursor: pointer;
}

.help-back-btn:hover {
    text-decoration: underline;
}

/* No results */
.help-no-results {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--bs-secondary-color, #6c757d);
}

.help-no-results i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 767.98px) {
    .help-sidebar {
        width: 100%;
    }
}