/* Main Q&A content wrapper */
.qa-content-wrapper {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

@media (min-width: 1024px) {
    .qa-content-wrapper {
        flex-direction: row;
        gap: 4rem;
    }
}

/* Search Box */
.qa-search-container {
    margin: 1.5rem 0 2rem;
}

.qa-search-container .relative {
    position: relative;
}

.qa-search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border-radius: 0.5rem;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
}

.qa-search-input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 131, 0, 0.15);
}

.qa-search-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.qa-search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
    font-size: 1rem;
}

.qa-search-clear {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    transition: color var(--transition-speed), background-color var(--transition-speed);
    display: none;
    font-size: 0.875rem;
}

.qa-search-clear:hover {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

.qa-search-clear.visible {
    display: block;
}

.qa-search-stats {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: none;
}

.qa-search-stats.visible {
    display: block;
}

.qa-search-stats span {
    font-weight: 600;
    color: var(--accent-color);
}

/* Episode Wrapper */
.qa-episode-wrapper {
    margin-bottom: 1.5rem;
    border-radius: 0.5rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--bg-tertiary);
    transition: border-color var(--transition-speed);
}

.qa-episode-wrapper:last-child {
    margin-bottom: 0;
}

/* Episode Header - Collapsible */
.qa-collapsible-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    cursor: pointer;
    background-color: var(--bg-secondary);
    transition: background-color var(--transition-speed);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.qa-collapsible-header:hover {
    background-color: var(--bg-secondary);
}

.qa-collapsible-header:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: -2px;
}

.qa-collapsible-header .qa-episode-header-left {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.qa-collapsible-header .qa-episode-number {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: var(--font-heading);
}

.qa-collapsible-header .qa-episode-date-badge {
    font-size: 0.8rem;
    font-weight: bold;
    color: var(--text-primary);
    background-color: var(--bg-quaternary);
    padding: 0.2rem 0.6rem;
    border-radius: 0.25rem;
}

.qa-collapsible-header .qa-episode-question-count {
    font-size: 0.8rem;
    font-weight: bold;
    color: var(--text-primary);
    background-color: var(--accent-color);
    padding: 0.2rem 0.6rem;
    border-radius: 0.25rem;
}

.qa-collapsible-header .qa-episode-header-right {
    display: flex;
    align-items: center;
}

.qa-collapsible-header .qa-episode-toggle-icon {
    color: var(--text-secondary);
    font-size: 1rem;
    transition: transform var(--transition-speed);
}

.qa-collapsible-header.expanded .qa-episode-toggle-icon {
    transform: rotate(0deg);
}

/* Episode Content */
.qa-episode-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                padding 0.3s ease,
                opacity 0.3s ease;
    padding: 0 1.25rem;
    opacity: 0;
}

.qa-episode-content.expanded {
    max-height: 100000px; /* Large enough for all content */
    padding: 1.25rem;
    opacity: 1;
    transition: max-height 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                padding 0.3s ease,
                opacity 0.3s ease;
}

/* TLDR inside episode content */
.qa-episode-content .qa-episode-tldr {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    padding: 0.75rem 1rem;
    background-color: var(--bg-secondary);
    border-radius: 0.375rem;
    font-size: 0.95rem;
    border-left: 3px solid var(--accent-color);
}

.qa-episode-content .qa-episode-tldr strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Q&A Items (Questions) */
.qa-item {
    margin-bottom: 1.5rem;
    transition: opacity var(--transition-speed), transform var(--transition-speed);
}

.qa-item:last-child {
    margin-bottom: 0;
}

.qa-item.hidden {
    display: none;
}

/* Highlight-takeaways wrapper */
.qa-item .highlight-takeaways {
    background-color: var(--card-bg);
    border-left: 4px solid var(--accent-color);
    padding: 1.5rem;
    border-radius: 0 0.375rem 0.375rem 0;
    box-shadow: var(--shadow);
    transition: box-shadow var(--transition-speed);
}

.qa-item .highlight-takeaways:hover {
    box-shadow: var(--shadow-lg);
}

.qa-item .highlight-takeaways .title {
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 0.75rem;
    font-size: 1rem;
    font-family: var(--font-heading);
}

.qa-item .highlight-takeaways ul {
    padding-left: 1.5rem;
    margin: 0;
    list-style: disc;
}

.qa-item .highlight-takeaways li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    line-height: 1.6;
    font-size: 0.95rem;
}

.qa-item .highlight-takeaways li:last-child {
    margin-bottom: 0;
}

.qa-item .highlight-takeaways li strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Notes section within Q&A */
.qa-notes {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.qa-notes strong {
    color: var(--text-primary);
    font-weight: 600;
}

.qa-notes ul {
    padding-left: 1.5rem;
    margin-top: 0.25rem;
    list-style: disc;
}

.qa-notes li {
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    font-size: 0.875rem;
}

/* Empty state */
.qa-empty-state {
    color: var(--text-secondary);
    font-style: italic;
    padding: 1rem 0;
}

/* Loading & Error States */
.qa-loading {
    text-align: center;
    padding: 3rem 0;
}

.qa-loading-spinner {
    display: inline-block;
    width: 3rem;
    height: 3rem;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: qa-spin 0.8s linear infinite;
    margin-bottom: 1rem;
}

@keyframes qa-spin {
    to {
        transform: rotate(360deg);
    }
}

.qa-loading-text {
    color: var(--text-secondary);
    font-size: 1rem;
}

.qa-error {
    text-align: center;
    padding: 3rem 0;
}

.qa-error-icon {
    font-size: 2.5rem;
    color: #ef4444;
    margin-bottom: 1rem;
}

.qa-error-text {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.qa-error-retry {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--accent-color);
    color: white;
    padding: 0.625rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
    font-family: var(--font-body);
}

.qa-error-retry:hover {
    background-color: var(--accent-color-hover);
    transform: translateY(-2px);
}

/* Table of Contents (Sidebar) */
.qa-toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.qa-toc-list li {
    margin-bottom: 0.5rem;
}

.qa-toc-list li:last-child {
    margin-bottom: 0;
}

.qa-toc-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-speed);
    font-size: 0.95rem;
    display: block;
    padding: 0.25rem 0;
    font-family: var(--font-body);
}

.qa-toc-link:hover {
    color: var(--accent-color);
}

.qa-toc-link.active {
    color: var(--accent-color);
    font-weight: 500;
}

/* Mobile Sidebar Content */
.qa-mobile-sidebar {
    display: block;
    margin-top: 2rem;
}

@media (min-width: 1024px) {
    .qa-mobile-sidebar {
        display: none;
    }
}

/* Desktop Sidebar */
.qa-desktop-sidebar {
    display: none;
}

@media (min-width: 1024px) {
    .qa-desktop-sidebar {
        display: block;
        flex: 1;
        position: sticky;
        top: 6rem;
        align-self: flex-start;
        max-height: calc(100vh - 7rem);
        overflow-y: auto;
    }
}

/* Author Card (reuses sidebar-card) */

.qa-author-card .author-info {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.qa-author-card .author-info img {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-color);
}

.qa-author-card .author-info h4 {
    font-weight: bold;
    margin-bottom: 0.25rem;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: var(--font-heading);
}

.qa-author-card .author-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-family: var(--font-body);
}

/* Responsive Adjustments */
@media (max-width: 640px) {
    .qa-search-input {
        padding: 0.625rem 1rem 0.625rem 2.75rem;
        font-size: 0.95rem;
    }

    .qa-search-icon {
        left: 0.75rem;
        font-size: 0.875rem;
    }

    .qa-collapsible-header {
        padding: 0.75rem 1rem;
    }

    .qa-collapsible-header .qa-episode-number {
        font-size: 0.9rem;
    }

    .qa-collapsible-header .qa-episode-date-badge {
        font-size: 0.7rem;
        padding: 0.15rem 0.5rem;
    }

    .qa-collapsible-header .qa-episode-question-count {
        font-size: 0.7rem;
        padding: 0.15rem 0.5rem;
    }

    .qa-episode-content.expanded {
        padding: 1rem;
    }

    .qa-item .highlight-takeaways {
        padding: 1rem;
    }

    .qa-item .highlight-takeaways .title {
        font-size: 0.95rem;
    }

    .qa-item .highlight-takeaways li {
        font-size: 0.9rem;
    }

    .qa-episode-content .qa-episode-tldr {
        font-size: 0.9rem;
        padding: 0.625rem 0.875rem;
    }
}

@media (max-width: 480px) {
    .qa-search-container {
        margin: 1rem 0 1.5rem;
    }

    .qa-search-input {
        padding: 0.5rem 0.75rem 0.5rem 2.5rem;
        font-size: 0.9rem;
        border-radius: 0.375rem;
    }

    .qa-search-icon {
        left: 0.625rem;
        font-size: 0.8rem;
    }

    .qa-search-clear {
        right: 0.5rem;
        font-size: 0.8rem;
    }

    .qa-collapsible-header {
        padding: 0.625rem 0.75rem;
        flex-wrap: wrap;
    }

    .qa-collapsible-header .qa-episode-header-left {
        gap: 0.5rem;
        flex: 1;
    }

    .qa-collapsible-header .qa-episode-number {
        font-size: 0.85rem;
    }

    .qa-collapsible-header .qa-episode-date-badge {
        font-size: 0.65rem;
        padding: 0.1rem 0.4rem;
    }

    .qa-collapsible-header .qa-episode-question-count {
        font-size: 0.65rem;
        padding: 0.1rem 0.4rem;
    }

    .qa-episode-content.expanded {
        padding: 0.75rem;
    }

    .qa-item .highlight-takeaways {
        padding: 0.875rem;
        border-left-width: 3px;
    }

    .qa-item .highlight-takeaways .title {
        font-size: 0.9rem;
    }

    .qa-item .highlight-takeaways li {
        font-size: 0.85rem;
        margin-bottom: 0.375rem;
    }

    .qa-notes {
        font-size: 0.8rem;
    }

    .qa-notes li {
        font-size: 0.8rem;
    }

    .qa-episode-content .qa-episode-tldr {
        font-size: 0.85rem;
        padding: 0.5rem 0.75rem;
    }
}

/* Reduced Motion */
.reduced-motion .qa-item {
    transition: none !important;
}

.reduced-motion .qa-item .highlight-takeaways {
    transition: none !important;
}

.reduced-motion .qa-error-retry {
    transition: none !important;
}

.reduced-motion .qa-loading-spinner {
    animation-duration: 0.01ms !important;
}

.reduced-motion .qa-episode-content {
    transition: none !important;
}

.reduced-motion .qa-collapsible-header {
    transition: none !important;
}

/* Scroll Margin for Anchor Links */
#introduction {
    scroll-margin-top: 6rem;
}

.qa-section-target {
    scroll-margin-top: 6rem;
}

@media (max-width: 640px) {
    #introduction,
    .qa-section-target {
        scroll-margin-top: 5.5rem;
    }
}