/* ============================================================================
   Athena Library Admin - Styles
   A sophisticated, scholarly aesthetic with warm accents
   ============================================================================ */

:root {
    /* Base colors - Deep scholarly palette */
    --color-bg: #0f1419;
    --color-bg-elevated: #1a2028;
    --color-bg-card: #1e2530;
    --color-bg-hover: #252d3a;
    
    /* Text */
    --color-text: #e8eaed;
    --color-text-muted: #8b9199;
    --color-text-dim: #5f6770;
    
    /* Accent - Warm amber/gold */
    --color-accent: #f0b429;
    --color-accent-hover: #ffc93c;
    --color-accent-dim: #b38600;
    
    /* Status colors */
    --color-success: #10b981;
    --color-success-bg: rgba(16, 185, 129, 0.1);
    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.1);
    --color-error: #ef4444;
    --color-error-bg: rgba(239, 68, 68, 0.1);
    --color-info: #3b82f6;
    --color-info-bg: rgba(59, 130, 246, 0.1);
    
    /* Borders */
    --color-border: #2d3748;
    --color-border-light: #374151;
    
    /* Fonts */
    --font-display: 'Crimson Pro', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(240, 180, 41, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Layout */
    --sidebar-width: 260px;
}

/* ============================================================================
   Reset & Base
   ============================================================================ */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ============================================================================
   App Layout
   ============================================================================ */

.app {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-bg-elevated);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.nav-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.nav-item:hover {
    background: var(--color-bg-hover);
    color: var(--color-text);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(240, 180, 41, 0.15), rgba(240, 180, 41, 0.05));
    color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-text-muted);
    transition: background var(--transition-normal);
}

.status-indicator.healthy .status-dot {
    background: var(--color-success);
    box-shadow: 0 0 8px var(--color-success);
}

.status-indicator.unhealthy .status-dot {
    background: var(--color-error);
    box-shadow: 0 0 8px var(--color-error);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--spacing-2xl);
    min-height: 100vh;
    background: 
        radial-gradient(ellipse at top right, rgba(240, 180, 41, 0.03), transparent 50%),
        radial-gradient(ellipse at bottom left, rgba(59, 130, 246, 0.02), transparent 50%),
        var(--color-bg);
}

/* Views */
.view {
    display: none;
    animation: fadeIn var(--transition-normal);
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.view-header {
    margin-bottom: var(--spacing-2xl);
}

.view-header h1 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

.view-header .subtitle {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

/* ============================================================================
   Dashboard
   ============================================================================ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    border-color: var(--color-border-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon svg {
    width: 28px;
    height: 28px;
}

.stat-icon.books {
    background: var(--color-accent-dim);
    background: linear-gradient(135deg, rgba(240, 180, 41, 0.2), rgba(240, 180, 41, 0.1));
    color: var(--color-accent);
}

.stat-icon.chunks {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(59, 130, 246, 0.1));
    color: var(--color-info);
}

.stat-icon.pages {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
    color: var(--color-success);
}

.stat-icon.processed {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(139, 92, 246, 0.1));
    color: #a78bfa;
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* Action Cards */
.recent-section h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.action-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.action-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
}

.action-card:hover {
    border-color: var(--color-accent);
    background: var(--color-bg-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.action-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(240, 180, 41, 0.15), rgba(240, 180, 41, 0.05));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
}

.action-icon svg {
    width: 24px;
    height: 24px;
}

/* ============================================================================
   Upload Form
   ============================================================================ */

.upload-container {
    max-width: 800px;
    position: relative;
}

.upload-form {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.dropzone {
    border: 2px dashed var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.dropzone:hover, .dropzone.dragover {
    border-color: var(--color-accent);
    background: rgba(240, 180, 41, 0.05);
}

.dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.dropzone-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.dropzone h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-text);
}

.dropzone p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.dropzone-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.dropzone-preview svg {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
}

.dropzone-preview span {
    font-weight: 500;
    color: var(--color-text);
}

.clear-file {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    font-size: 1rem;
    transition: color var(--transition-fast);
}

.clear-file:hover {
    color: var(--color-error);
}

/* Form Grid */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group.full {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(240, 180, 41, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-dim);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.checkbox-group {
    justify-content: flex-end;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-accent);
}

.checkbox-hint {
    font-size: 0.75rem;
    color: var(--color-text-dim);
    margin-top: var(--spacing-xs);
    margin-left: 26px;
}

.checkbox-hint.warning {
    color: var(--color-warning);
}

/* Form Actions */
.form-actions {
    margin-top: var(--spacing-xl);
    display: flex;
    justify-content: flex-end;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dim));
    color: #1a1a1a;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-accent-hover), var(--color-accent));
    transform: translateY(-1px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-border-light);
}

.btn-danger {
    background: var(--color-error);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

/* Upload Progress */
.upload-progress {
    position: absolute;
    inset: 0;
    background: rgba(15, 20, 25, 0.95);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-progress[hidden] {
    display: none;
}

.progress-content {
    text-align: center;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

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

.progress-content h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.progress-content p {
    color: var(--color-text-muted);
}

/* ============================================================================
   Library View
   ============================================================================ */

.library-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.filter-group {
    display: flex;
    gap: var(--spacing-lg);
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.book-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

.book-card:hover {
    border-color: var(--color-border-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.book-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.book-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.3;
}

.book-author {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.book-status {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.book-status.processed {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.book-status.pending {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.book-badge {
    display: inline-block;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    vertical-align: middle;
    margin-left: var(--spacing-xs);
}

.book-badge.ocr {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(139, 92, 246, 0.1));
    color: #a78bfa;
}

.book-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.book-meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

.book-meta-item svg {
    width: 14px;
    height: 14px;
}

.book-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.book-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.book-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.book-actions button {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.book-actions button svg {
    width: 16px;
    height: 16px;
}

.book-actions .btn-process {
    background: var(--color-info-bg);
    color: var(--color-info);
}

.book-actions .btn-process:hover {
    background: rgba(59, 130, 246, 0.2);
}

.book-actions .btn-delete {
    background: var(--color-error-bg);
    color: var(--color-error);
}

.book-actions .btn-delete:hover {
    background: rgba(239, 68, 68, 0.2);
}

/* Empty State */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-muted);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

/* ============================================================================
   Search View
   ============================================================================ */

.search-container {
    max-width: 900px;
}

.search-form {
    margin-bottom: var(--spacing-2xl);
}

.search-input-wrapper {
    display: flex;
    align-items: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.search-input-wrapper:focus-within {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(240, 180, 41, 0.1);
}

.search-input-wrapper svg {
    width: 24px;
    height: 24px;
    color: var(--color-text-muted);
    margin: 0 var(--spacing-md);
}

.search-input-wrapper input {
    flex: 1;
    background: none;
    border: none;
    font-size: 1.1rem;
    color: var(--color-text);
    font-family: var(--font-body);
    padding: var(--spacing-md);
}

.search-input-wrapper input:focus {
    outline: none;
}

.search-input-wrapper input::placeholder {
    color: var(--color-text-dim);
}

.search-btn {
    background: var(--color-accent);
    color: #1a1a1a;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-btn:hover {
    background: var(--color-accent-hover);
}

.search-options {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
    padding-left: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
}

.search-options label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.search-mode-toggle {
    display: flex;
    gap: var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.radio-label input[type="radio"] {
    margin: 0;
    accent-color: var(--color-accent);
}

.radio-label:has(input:checked) {
    background: var(--color-accent);
    color: #1a1a1a;
    font-weight: 600;
}

.search-options select {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-text);
    font-family: var(--font-body);
}

/* Search Results */
.search-results {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.search-result {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

.search-result:hover {
    border-color: var(--color-border-light);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.result-source {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-accent);
}

.result-page {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.result-similarity {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.similarity-bar {
    width: 60px;
    height: 6px;
    background: var(--color-border);
    border-radius: 3px;
    overflow: hidden;
}

.similarity-fill {
    height: 100%;
    background: var(--color-accent);
    border-radius: 3px;
}

.result-content {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-muted);
}

.result-content mark {
    background: rgba(240, 180, 41, 0.2);
    color: var(--color-text);
    padding: 0 2px;
    border-radius: 2px;
}

/* ============================================================================
   AI Chat Response
   ============================================================================ */

.chat-response {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.chat-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.chat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(139, 92, 246, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #a78bfa;
    flex-shrink: 0;
}

.chat-icon svg {
    width: 24px;
    height: 24px;
}

.chat-header h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.chat-model {
    font-size: 0.75rem;
    color: var(--color-text-dim);
    margin-top: var(--spacing-xs);
}

.chat-answer {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text);
}

.chat-answer p {
    margin: 0 0 var(--spacing-md) 0;
}

.chat-answer p:last-child {
    margin-bottom: 0;
}

.chat-sources {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.chat-sources h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
}

/* ============================================================================
   Modal
   ============================================================================ */

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 400px;
    width: 90%;
    animation: modalIn var(--transition-normal);
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-content h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.modal-content p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* ============================================================================
   Toast Notifications
   ============================================================================ */

.toast-container {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    z-index: 1001;
}

.toast {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 300px;
    box-shadow: var(--shadow-lg);
    animation: toastIn var(--transition-normal);
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

.toast.toast-out {
    animation: toastOut var(--transition-normal) forwards;
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(100%); }
}

.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.toast.success {
    border-color: var(--color-success);
}

.toast.success .toast-icon {
    color: var(--color-success);
}

.toast.error {
    border-color: var(--color-error);
}

.toast.error .toast-icon {
    color: var(--color-error);
}

.toast.info {
    border-color: var(--color-warning);
}

.toast.info .toast-icon {
    color: var(--color-warning);
}

.toast-message {
    flex: 1;
    font-size: 0.875rem;
}

.toast-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
}

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

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    
    .sidebar-nav {
        flex-direction: row;
        overflow-x: auto;
        padding: var(--spacing-sm);
    }
    
    .nav-item span {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
        padding: var(--spacing-lg);
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .form-group.full {
        grid-column: 1;
    }
}