/* ============================================
   DOCS — ZIRA Documentation Styles
   ============================================ */

/* ============================================
   Docs Header
   ============================================ */

.docs-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-4) var(--space-6);
    background: rgba(5, 8, 15, 0.95);
    border-bottom: 1px solid var(--border-subtle);
    backdrop-filter: blur(20px);
}

.docs-nav {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.docs-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
}

.docs-logo .logo-text {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 500;
    letter-spacing: var(--tracking-wide);
    color: var(--text-primary);
}

.docs-logo .logo-mark {
    width: 8px;
    height: 8px;
    background: var(--signal-blue);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.docs-nav-links {
    display: flex;
    gap: var(--space-8);
}

.docs-nav-links a {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.docs-nav-links a:hover,
.docs-nav-links a.active {
    color: var(--text-primary);
}

/* ============================================
   Docs Main Layout
   ============================================ */

.docs-main {
    padding-top: 80px;
    min-height: 100vh;
}

.docs-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-12);
    padding: var(--space-8) var(--space-6);
}

/* ============================================
   Sidebar
   ============================================ */

.docs-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
    padding-right: var(--space-6);
    border-right: 1px solid var(--border-subtle);
}

.docs-toc {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.toc-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.toc-title {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 400;
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: var(--space-2);
}

.toc-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-link {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 300;
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    display: block;
}

.toc-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.toc-link.active {
    color: var(--signal-blue);
    background: rgba(59, 130, 246, 0.1);
}

/* ============================================
   Content Area
   ============================================ */

.docs-content {
    max-width: 800px;
    padding-bottom: var(--space-16);
}

.docs-section {
    margin-bottom: var(--space-16);
    scroll-margin-top: 100px;
}

.docs-title {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.docs-lead {
    font-family: var(--font-body);
    font-size: var(--text-xl);
    font-weight: 300;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-8);
}

.docs-section h2 {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 400;
    color: var(--text-primary);
    margin-top: var(--space-12);
    margin-bottom: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-subtle);
}

.docs-section h2:first-of-type {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.docs-section h3 {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 500;
    color: var(--text-primary);
    margin-top: var(--space-8);
    margin-bottom: var(--space-4);
}

.docs-section h4 {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--text-primary);
    margin-top: var(--space-6);
    margin-bottom: var(--space-3);
}

.docs-section p {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 300;
    line-height: 1.85;
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.docs-section ul,
.docs-section ol {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 300;
    line-height: 1.85;
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    padding-left: var(--space-6);
}

.docs-section li {
    margin-bottom: var(--space-2);
}

.docs-section ul li {
    list-style-type: disc;
}

.docs-section ol li {
    list-style-type: decimal;
}

.docs-section strong {
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================
   Concept Cards
   ============================================ */

.concept-card {
    background: rgba(10, 14, 23, 0.5);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
}

.concept-card h3 {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 500;
    color: var(--signal-blue);
    margin-top: 0;
    margin-bottom: var(--space-4);
}

.concept-card h4 {
    color: var(--convergence-teal);
}

.concept-card ul {
    margin-bottom: 0;
}

.concept-card p {
    margin-bottom: var(--space-4);
}

.concept-card p:last-child {
    margin-bottom: 0;
}

.docs-highlight {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(59, 130, 246, 0.02));
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin: var(--space-8) 0;
}

.docs-highlight h3,
.docs-highlight h4 {
    color: var(--signal-blue);
    margin-top: 0;
}

.docs-highlight p {
    margin-bottom: 0;
}

.important {
    background: rgba(212, 160, 23, 0.1);
    border-left: 3px solid var(--structural-gold);
    padding: var(--space-4);
    padding-left: var(--space-5);
    margin: var(--space-4) 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
}

/* ============================================
   Tables
   ============================================ */

.docs-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-6) 0;
    background: rgba(10, 14, 23, 0.5);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.docs-table th,
.docs-table td {
    padding: var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
}

.docs-table th {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 400;
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    color: var(--text-tertiary);
    background: rgba(10, 14, 23, 0.8);
}

.docs-table td {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 300;
    color: var(--text-secondary);
}

.docs-table tr:last-child td {
    border-bottom: none;
}

.docs-table tr:hover td {
    background: rgba(59, 130, 246, 0.03);
}

/* ============================================
   Layer Diagram
   ============================================ */

.layer-diagram {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin: var(--space-8) 0;
}

.layer-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-5);
    padding: var(--space-5);
    background: rgba(10, 14, 23, 0.5);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
}

.layer-item.layer-1 {
    border-color: rgba(212, 160, 23, 0.3);
}

.layer-item.layer-2 {
    border-color: rgba(59, 130, 246, 0.3);
}

.layer-item.layer-3 {
    border-color: rgba(20, 184, 166, 0.3);
}

.layer-num {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    font-weight: 400;
    border-radius: 50%;
    flex-shrink: 0;
}

.layer-1 .layer-num {
    background: rgba(212, 160, 23, 0.1);
    color: var(--structural-gold);
    border: 1px solid rgba(212, 160, 23, 0.3);
}

.layer-2 .layer-num {
    background: rgba(59, 130, 246, 0.1);
    color: var(--signal-blue);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.layer-3 .layer-num {
    background: rgba(20, 184, 166, 0.1);
    color: var(--convergence-teal);
    border: 1px solid rgba(20, 184, 166, 0.3);
}

.layer-info h4 {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 500;
    color: var(--text-primary);
    margin: 0 0 var(--space-2);
}

.layer-info p {
    font-size: var(--text-sm);
    margin: 0 0 var(--space-2);
}

.layer-detail {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

/* ============================================
   Mechanic Grid
   ============================================ */

.mechanic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-4);
    margin: var(--space-6) 0;
}

.mechanic-item {
    padding: var(--space-5);
    background: rgba(10, 14, 23, 0.5);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
}

.mechanic-item h4 {
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--convergence-teal);
    margin: 0 0 var(--space-2);
}

.mechanic-item p {
    font-size: var(--text-sm);
    margin: 0;
}

/* ============================================
   Continuum Timeline
   ============================================ */

.continuum-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin: var(--space-8) 0;
}

.phase {
    padding: var(--space-5);
    background: rgba(10, 14, 23, 0.5);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
}

.phase.current {
    border-color: rgba(59, 130, 246, 0.4);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), transparent);
}

.phase h4 {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 500;
    color: var(--text-primary);
    margin: 0 0 var(--space-2);
}

.phase p {
    font-size: var(--text-sm);
    margin: 0;
}

/* ============================================
   Footer
   ============================================ */

.docs-footer {
    padding: var(--space-8) var(--space-6);
    background: rgba(5, 8, 15, 0.95);
    border-top: 1px solid var(--border-subtle);
}

.docs-footer .footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

@media (max-width: 1024px) {
    .docs-container {
        grid-template-columns: 1fr;
    }
    
    .docs-sidebar {
        position: static;
        border-right: none;
        border-bottom: 1px solid var(--border-subtle);
        padding-right: 0;
        padding-bottom: var(--space-6);
        margin-bottom: var(--space-6);
    }
    
    .docs-toc {
        flex-direction: row;
        flex-wrap: wrap;
        gap: var(--space-6);
    }
    
    .toc-section {
        min-width: 150px;
    }
}

@media (max-width: 768px) {
    .docs-nav-links {
        gap: var(--space-4);
    }
    
    .docs-nav-links a {
        font-size: var(--text-xs);
    }
    
    .docs-title {
        font-size: var(--text-4xl);
    }
    
    .docs-section h2 {
        font-size: var(--text-2xl);
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.8; }
}