/* ===================================================
   Reference Library Styles
   ================================================ */

/* ===== Library Index Page ===== */

/* Library Grid */
.library-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .library-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

/* Library Cards */
.library-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
    color: var(--color-text-primary);
    transition: all 0.2s ease;
    cursor: pointer;
    /* iPhone/iOS touch optimizations */
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
}

/* Desktop hover state */
@media (hover: hover) and (pointer: fine) {
    .library-card:hover {
        border-color: var(--color-primary);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }
}

/* Touch device active state */
.library-card:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.library-card-icon {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 1rem;
}

.library-card-content {
    flex: 1;
}

.library-card-category {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    background: var(--color-bg-secondary);
    border-radius: 12px;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
}

.library-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.3;
    color: var(--color-text-primary);
}

.library-card-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.library-card-author {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
}

.library-card-description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.library-card-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--card-border);
    margin-top: auto;
}

.library-card-meta {
    display: flex;
    align-items: center;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

/* Card Actions (Edit/Delete) */
.library-card-actions {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    z-index: 10;
}

.library-card-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    /* iPhone/iOS touch optimizations */
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

/* Desktop hover state */
@media (hover: hover) and (pointer: fine) {
    .library-card-action-btn:hover {
        background: var(--color-primary);
        color: white;
        border-color: var(--color-primary);
        transform: scale(1.1);
    }
}

/* Touch device active state */
.library-card-action-btn:active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: scale(0.95);
}

/* Desktop: Show on hover */
@media (min-width: 769px) {
    .library-card-actions {
        opacity: 0;
        transition: opacity 0.2s ease;
    }

    .library-card:hover .library-card-actions {
        opacity: 1;
    }
}

/* Mobile: Always visible with better touch targets (Apple's 44px guideline) */
@media (max-width: 768px) {
    .library-card-action-btn {
        width: 44px;
        height: 44px;
    }

    /* Increase card padding on mobile to prevent accidental clicks */
    .library-card {
        padding: 1.25rem;
    }

    /* Position action buttons further from edge */
    .library-card-actions {
        top: 0.75rem;
        right: 0.75rem;
    }
}

/* Empty State */
.library-empty-icon {
    font-size: 4rem;
    opacity: 0.5;
}

/* iPhone-specific optimizations */
@media (max-width: 768px) {
    /* Ensure all buttons meet 44px touch target */
    .btn {
        min-height: 44px;
    }

    /* Improve page header button spacing on mobile */
    .d-flex.justify-content-between {
        gap: 1rem;
    }

    /* Better spacing for search hint on mobile */
    .search-hint {
        padding: 0.75rem 0;
    }

    /* Optimize grid spacing for smaller screens */
    .library-grid {
        margin-top: 1rem;
    }
}

/* Circular add button on mobile */
@media (max-width: 575.98px) {
    .btn-primary.rounded-pill.add-reference-btn {
        width: 44px;
        height: 44px;
        padding: 0;
        border-radius: 50% !important;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* ===== Reference Reader Page ===== */

.reference-reader {
    position: fixed;
    top: 56px; /* Account for navbar */
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
}

.reference-reader-container {
    display: flex;
    height: 100%;
    position: relative;
}

/* Mobile Header */
.reference-mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--card-bg);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.reference-mobile-menu-btn {
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: 1.25rem;
    padding: 0.5rem;
    cursor: pointer;
}

.reference-mobile-title {
    flex: 1;
    text-align: center;
    padding: 0 1rem;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
    transition: opacity 0.2s ease;
}

.reference-mobile-title:active {
    opacity: 0.6;
}

/* Sidebars */
.reference-sidebar {
    width: 280px;
    background: var(--card-bg);
    border-right: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
}

.reference-search-sidebar {
    border-right: none;
    border-left: 1px solid var(--card-border);
}

.reference-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--card-border);
    flex-shrink: 0;
}

.reference-sidebar-title {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.reference-sidebar-close {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* Table of Contents */
.reference-toc {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.reference-toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.reference-toc-item {
    margin-bottom: 0.25rem;
}

.reference-toc-h1 {
    margin-top: 0.5rem;
}

.reference-toc-h2 {
    padding-left: 1rem;
}

.reference-toc-h3 {
    padding-left: 2rem;
}

.reference-toc-link {
    display: block;
    padding: 0.5rem 0.75rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.875rem;
    line-height: 1.4;
    transition: all 0.2s ease;
}

.reference-toc-link:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.reference-toc-link.active {
    background: var(--color-primary);
    color: white;
    font-weight: 500;
}

.reference-toc-loading,
.reference-toc-empty {
    padding: 1rem;
    text-align: center;
    color: var(--color-text-secondary);
}

/* Main Content */
.reference-main-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.reference-back-nav {
    margin-bottom: 1rem;
}

.reference-back-link {
    display: inline-flex;
    align-items: center;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
}

.reference-back-link:hover {
    color: var(--color-primary);
}

/* Reference Header (Compact) */
.reference-header {
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--card-border);
    margin-bottom: 1.5rem;
}

.reference-header-main {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.reference-icon-compact {
    font-size: 2.5rem;
    line-height: 1;
    flex-shrink: 0;
}

.reference-header-text {
    flex: 1;
    min-width: 0;
}

.reference-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--color-text-primary);
    line-height: 1.2;
}

.reference-title-clickable {
    cursor: pointer;
    transition: color 0.2s ease;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
}

/* Desktop hover state */
@media (hover: hover) and (pointer: fine) {
    .reference-title-clickable:hover {
        color: var(--color-primary);
    }
}

/* Touch device active state */
.reference-title-clickable:active {
    color: var(--color-primary);
    opacity: 0.8;
}

.reference-subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.reference-author {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

.reference-header-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.reference-category-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: var(--color-bg-secondary);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Reference Meta */
.reference-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.reference-meta-item {
    display: flex;
    align-items: center;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

/* Reference Actions */
.reference-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

/* Reference Content */
.reference-content {
    font-size: 1.0625rem;
    line-height: 1.75;
    color: var(--color-text-primary);
}

.reference-content h1,
.reference-content h2,
.reference-content h3,
.reference-content h4,
.reference-content h5,
.reference-content h6 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
}

.reference-content h1 {
    font-size: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--card-border);
}

.reference-content h2 {
    font-size: 1.5rem;
}

.reference-content h3 {
    font-size: 1.25rem;
}

.reference-content p {
    margin-bottom: 1rem;
}

.reference-content ul,
.reference-content ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.reference-content li {
    margin-bottom: 0.5rem;
}

.reference-content blockquote {
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: var(--color-bg-secondary);
    border-left: 4px solid var(--color-primary);
    border-radius: 8px;
}

.reference-content code {
    background: var(--color-bg-secondary);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: 'Courier New', monospace;
}

.reference-content pre {
    background: var(--color-bg-secondary);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.reference-content pre code {
    background: none;
    padding: 0;
}

.reference-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.reference-content a {
    color: var(--color-primary);
    text-decoration: underline;
}

.reference-content a:hover {
    color: var(--color-primary-dark, var(--color-primary));
}

/* Mark.js Highlight Styling */
.reference-content mark {
    background-color: #fff59d;
    color: #000;
    padding: 0.1rem 0.2rem;
    border-radius: 2px;
}

/* Search Panel */
.reference-search-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.reference-search-input-container {
    position: relative;
    margin-bottom: 1rem;
    padding: 1.5rem 1.5rem 0;
    flex-shrink: 0;
}

.reference-search-input {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    border: 1px solid var(--card-border);
    border-radius: 8px;
    font-size: 0.875rem;
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.reference-search-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.reference-search-clear {
    position: absolute;
    right: 2rem;
    top: calc(1.5rem + 50%);
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    font-size: 0.875rem;
}

.reference-search-clear:hover {
    color: var(--color-text-primary);
}

.reference-search-results {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0 1.5rem 1.5rem;
    font-size: 0.875rem;
    /* Enable smooth scrolling on iOS */
    -webkit-overflow-scrolling: touch;
}

.reference-search-help,
.reference-search-no-results {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--color-text-secondary);
}

.reference-search-help i,
.reference-search-no-results i {
    display: block;
    font-size: 2rem;
    opacity: 0.5;
}

.reference-search-summary {
    padding: 1rem;
    background: var(--color-bg-secondary);
    border-radius: 8px;
    display: flex;
    align-items: center;
}

/* Search Result Cards */
.reference-search-cards {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.reference-search-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    -webkit-tap-highlight-color: transparent;
}

.reference-search-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.reference-search-card.active {
    border-color: var(--color-primary);
    background: rgba(var(--bs-primary-rgb, 13, 110, 253), 0.05);
}

.reference-search-card-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.reference-search-card-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
}

.reference-search-card-section {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.reference-search-card-body {
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--color-text-primary);
}

.reference-search-card-body mark.context-highlight {
    background-color: #fff59d;
    color: #000;
    padding: 0.1rem 0.2rem;
    border-radius: 2px;
    font-weight: 600;
}

/* Match Navigation Bar */
.match-navigation {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 100;
}

.match-navigation .match-counter {
    font-size: 0.875rem;
    color: var(--color-text-primary);
    font-weight: 500;
    padding: 0 0.5rem;
}

.match-navigation .btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0.25rem 0.5rem;
}

.match-navigation .btn i {
    font-size: 0.875rem;
}

/* Current Match Highlighting */
.reference-content mark.current-match {
    background-color: #ff6f00;
    color: white;
    font-weight: 700;
    padding: 0.2rem 0.3rem;
    border-radius: 3px;
    box-shadow: 0 0 0 3px rgba(255, 111, 0, 0.2);
}

/* Mobile Sidebar Overlay */
.reference-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

.reference-overlay.active {
    display: block;
}

/* ===== Responsive Design ===== */

@media (max-width: 991px) {
    .reference-reader {
        position: relative;
        top: 0;
    }

    .reference-reader-container {
        flex-direction: column;
    }

    /* Hide sidebars by default on mobile */
    .reference-sidebar {
        position: fixed;
        top: 0;
        bottom: 0;
        width: 300px;
        z-index: 1000;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .reference-toc-sidebar {
        left: 0;
    }

    .reference-search-sidebar {
        right: 0;
        left: auto;
        transform: translateX(100%);
        border-left: 1px solid var(--card-border);
        border-right: none;
    }

    .reference-sidebar.active {
        transform: translateX(0);
    }

    .reference-sidebar-close {
        display: block;
    }

    .reference-main-content {
        padding: 1.5rem;
    }

    .reference-title {
        font-size: 1.75rem;
    }

    .reference-subtitle {
        font-size: 1rem;
    }

    .reference-content {
        font-size: 1rem;
    }

    .reference-content h1 {
        font-size: 1.5rem;
    }

    .reference-content h2 {
        font-size: 1.25rem;
    }

    .reference-content h3 {
        font-size: 1.125rem;
    }
}

@media (max-width: 768px) {
    /* Stack header on mobile */
    .reference-header-main {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 0.75rem;
    }

    .reference-icon-compact {
        font-size: 2rem;
    }

    .reference-title {
        font-size: 1.5rem;
    }

    .reference-subtitle {
        font-size: 0.875rem;
    }

    /* Stack footer on mobile */
    .reference-header-footer {
        flex-direction: column;
        align-items: flex-start;
    }

    .reference-meta {
        width: 100%;
        justify-content: space-between;
        font-size: 0.75rem;
    }

    .reference-actions {
        width: 100%;
    }

    .reference-actions .btn {
        flex: 1;
    }

    /* Mobile Navigation Bar */
    .match-navigation {
        bottom: 1rem;
        left: 1rem;
        right: 1rem;
        padding: 0.5rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .match-navigation .btn {
        min-width: 40px;
        height: 40px;
    }

    .match-navigation .match-counter {
        flex: 1 1 100%;
        text-align: center;
        padding: 0.25rem;
        order: -1;
    }
}

/* ===== Dark Mode Support ===== */

@media (prefers-color-scheme: dark) {
    .reference-content mark {
        background-color: #f9a825;
        color: #000;
    }

    .reference-search-card-body mark.context-highlight {
        background-color: #f9a825;
        color: #000;
    }

    .reference-content mark.current-match {
        background-color: #ff6f00;
        color: #fff;
    }
}