/* Academic CSS - Content Styling and Phase Pages */

/* ===== Page Layout ===== */
.page-container {
    max-width: 1600px;
    margin: 0 auto;
}

/* ===== Breadcrumb Navigation ===== */
.breadcrumb {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-card-bg);
    border-bottom: 1px solid var(--color-border);
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    font-family: var(--font-sans);
    font-size: 0.9rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li:not(:last-child)::after {
    content: '›';
    margin-left: var(--spacing-xs);
    color: var(--color-text-light);
}

.breadcrumb a {
    color: var(--color-primary);
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* ===== Content Layout (Sidebar + Main) ===== */
.content-layout {
    display: flex;
    min-height: calc(100vh - 200px);
}

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--color-card-bg);
    border-right: 1px solid var(--color-border);
    position: sticky;
    top: var(--header-height);
    height: calc(100vh - var(--header-height));
    overflow-y: auto;
    flex-shrink: 0;
}

.sidebar-toggle {
    display: none;
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--color-primary);
    color: white;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    text-align: left;
}

.sidebar-content {
    padding: var(--spacing-lg);
}

.sidebar h2 {
    font-size: 1.25rem;
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: var(--spacing-sm);
}

/* ===== Table of Contents ===== */
.toc {
    font-family: var(--font-sans);
}

.toc ul {
    list-style: none;
}

.toc li {
    margin-bottom: var(--spacing-xs);
}

.toc a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-text);
    border-radius: 4px;
    transition: var(--transition-fast);
    font-size: 0.95rem;
}

.toc a:hover {
    background-color: var(--color-hover);
    text-decoration: none;
}

.toc a.active {
    background-color: var(--color-primary);
    color: white;
    font-weight: 600;
}

.toc .empty-message {
    color: var(--color-text-light);
    font-style: italic;
    padding: var(--spacing-md);
}

.toc .loading {
    color: var(--color-text-light);
    padding: var(--spacing-md);
}

/* ===== Hierarchical TOC Styles ===== */
.toc-root {
    padding-left: 0;
}

.toc-node {
    margin-bottom: var(--spacing-xs);
}

.toc-node-header {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: var(--transition-fast);
    user-select: none;
}

.toc-node-header:hover {
    background-color: var(--color-hover);
}

.toc-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-xs);
    color: var(--color-text-light);
    font-size: 0.7rem;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.toc-toggle:hover {
    color: var(--color-primary);
}

.toc-label {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.95rem;
}

/* Year level styling */
.toc-level-year .toc-label {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 700;
}

/* Month level styling */
.toc-level-month .toc-label {
    font-size: 0.9rem;
    color: var(--color-text);
    font-weight: 600;
}

.toc-children {
    padding-left: var(--spacing-lg);
    margin-top: var(--spacing-xs);
    transition: all 0.3s ease;
}

/* Phase overview special styling */
.toc-phase-overview {
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    font-weight: 600;
}

.toc-phase-overview a {
    font-weight: 600;
    color: var(--color-primary);
}

/* Document links in hierarchical structure */
.toc-document {
    list-style: none;
    margin-bottom: var(--spacing-xs);
}

.toc-document a {
    padding: var(--spacing-xs) var(--spacing-sm);
    padding-left: var(--spacing-md);
    font-size: 0.9rem;
    border-left: 2px solid transparent;
    transition: all 0.2s ease;
}

.toc-document a:hover {
    border-left-color: var(--color-primary);
    background-color: var(--color-hover);
}

.toc-document a.active {
    background-color: var(--color-primary);
    color: white;
    border-left-color: var(--color-primary);
    font-weight: 600;
}

/* Smooth expand/collapse animation */
.toc-children[style*="display: none"] {
    opacity: 0;
    max-height: 0;
    overflow: hidden;
}

.toc-children[style*="display: block"] {
    opacity: 1;
    max-height: 2000px;
    overflow: visible;
}

/* ===== Main Content Area ===== */
.main-content {
    flex: 1;
    padding: var(--spacing-xl) var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

#contentArea {
    min-height: 400px;
}

.loading-message {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
}

/* ===== Academic Content Styling ===== */
article {
    font-size: 1.125rem;
    line-height: 1.8;
}

article img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: var(--spacing-lg) auto;
    border-radius: 4px;
    box-shadow: var(--shadow-sm);
}

article blockquote {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    border-left: 4px solid var(--color-secondary);
    background-color: var(--color-hover);
    font-style: italic;
}

article blockquote p:last-child {
    margin-bottom: 0;
}

article ul,
article ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

article li {
    margin-bottom: var(--spacing-xs);
}

article code {
    font-family: 'Courier New', Courier, monospace;
    background-color: var(--color-hover);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-size: 0.9em;
}

article pre {
    background-color: var(--color-hover);
    padding: var(--spacing-md);
    border-radius: 4px;
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
    white-space: pre-wrap;
    word-wrap: break-word;
}

article pre code {
    background-color: transparent;
    padding: 0;
    white-space: pre-wrap;
    word-break: break-word;
}

/* Tables */
article table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-lg);
    font-size: 0.95rem;
}

/* Table wrapper for responsive scrolling */
.table-wrapper {
    overflow-x: auto;
    margin-bottom: var(--spacing-lg);
    -webkit-overflow-scrolling: touch;
}

article th,
article td {
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    text-align: left;
}

article th {
    background-color: var(--color-primary);
    color: white;
    font-family: var(--font-sans);
    font-weight: 600;
}

article tr:nth-child(even) {
    background-color: var(--color-hover);
}

/* Figures and Captions */
article figure {
    margin: var(--spacing-lg) 0;
    text-align: center;
}

article figcaption {
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-style: italic;
    margin-top: var(--spacing-sm);
}

/* Citations and References */
.citation {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.reference-list {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--color-border);
}

.reference-list h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.reference-list ol {
    padding-left: var(--spacing-lg);
}

.reference-list li {
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

/* ===== Phase Introduction ===== */
.phase-introduction {
    background-color: var(--color-card-bg);
    border-left: 4px solid var(--color-secondary);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    border-radius: 4px;
}

.phase-introduction h1 {
    margin-top: 0;
}

.phase-introduction .phase-description {
    font-size: 1.1rem;
    color: var(--color-text-light);
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
}

.empty-state h2 {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.empty-state p {
    color: var(--color-text-light);
    font-size: 1rem;
}

/* ===== Page Navigation Buttons ===== */
.page-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--color-border);
}

/* When only one button exists, center it */
.page-navigation:has(.nav-button:only-child) {
    justify-content: center;
}

.nav-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
}

.nav-button:hover {
    background-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.nav-button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.nav-button:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.nav-button .nav-arrow {
    font-size: 1.25rem;
    line-height: 1;
}

.nav-button .nav-label {
    line-height: 1;
}

.prev-button {
    margin-right: auto;
}

.next-button {
    margin-left: auto;
}

/* ===== Print Styles ===== */
@media print {
    header,
    .sidebar,
    .breadcrumb,
    footer {
        display: none;
    }
    
    .main-content {
        max-width: 100%;
        padding: 0;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: black;
        background: white;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    h1, h2, h3, h4, h5, h6 {
        page-break-after: avoid;
        color: black;
    }
    
    img {
        max-width: 100%;
        page-break-inside: avoid;
    }
    
    table {
        page-break-inside: avoid;
    }
}

/* ===== Responsive Design for Phase Pages ===== */
@media (max-width: 1024px) {
    .sidebar {
        width: 250px;
    }
    
    .main-content {
        padding: var(--spacing-lg) var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .content-layout {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        position: static;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
    }
    
    .sidebar-toggle {
        display: block;
    }
    
    .sidebar-content {
        display: none;
    }
    
    .sidebar-content.active {
        display: block;
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    /* Responsive tables for tablets */
    article table {
        font-size: 0.9rem;
    }
    
    article th,
    article td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    article {
        font-size: 1rem;
    }
    
    .breadcrumb {
        padding: var(--spacing-sm);
    }
    
    .page-navigation {
        gap: var(--spacing-sm);
        flex-wrap: wrap;
    }
    
    .nav-button {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
        flex: 1 1 auto;
        min-width: 120px;
    }
    
    .nav-button .nav-label {
        font-size: 0.85rem;
    }
    
    /* Mobile-friendly tables */
    article table {
        font-size: 0.85rem;
    }
    
    article th,
    article td {
        padding: var(--spacing-xs);
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    /* Extra small code blocks */
    article pre {
        font-size: 0.8rem;
        padding: var(--spacing-sm);
    }
}

/* ===== Accessibility ===== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-sm);
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Screen reader only text */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}