/* Responsive Design - Mobile-first approach */

/* Mobile styles (default, < 768px) */
@media (max-width: 767px) {
    /* Layout */
    .feed-sidebar {
        display: none;
    }
    
    .wiki-sidebar {
        display: none;
    }
    
    /* Hide sidebar note on mobile since sidebar is hidden */
    .wiki-sidebar-note {
        display: none;
    }
    
    /* Show mobile selector on mobile */
    .mobile-selector {
        display: block;
    }
    
    /* Show mobile custom dropdown on mobile */
    .mobile-selector-custom {
        display: block;
    }
    
    /* Hide e-books table on mobile, show dropdown instead */
    .ebooks-table {
        display: none;
    }
    
    .layout-container {
        flex-direction: column;
        padding: 1rem;
        gap: 1rem;
    }
    
    .main-content {
        width: 100%;
        min-width: 0;
    }
    
    /* Ensure no overflow on mobile */
    article, .feed-container, .nav-container {
        overflow-x: hidden;
        word-wrap: break-word;
    }
    
    /* Navigation */
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px; /* Match header height */
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-secondary);
        flex-direction: column;
        align-items: flex-start;
        padding: 2rem;
        transition: left 0.3s;
        border-top: 1px solid var(--border-color);
        z-index: 999;
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.2);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
        padding: 0.5rem 0;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        border: none;
        box-shadow: none;
        margin-left: 1rem;
        margin-top: 0.5rem;
        margin-bottom: 0.5rem;
    }
    
    .dropdown-toggle .dropdown-arrow {
        transform: none !important;
    }
    
    /* Typography */
    h1 {
        font-size: 1.75rem;
        line-height: 1.2;
    }
    
    h2 {
        font-size: 1.5rem;
        line-height: 1.3;
    }
    
    h3 {
        font-size: 1.25rem;
    }
    
    h4 {
        font-size: 1.1rem;
    }
    
    /* Spacing */
    article {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .nav-container {
        padding: 0.5rem 1rem;
    }
    
    /* Landing Page */
    .landing-page {
        padding: 1rem;
    }
    
    .landing-page .hero {
        padding: 1.5rem 0;
        margin-bottom: 2rem;
    }
    
    .landing-page .hero h1 {
        font-size: 1.75rem;
        margin-bottom: 0.75rem;
    }
    
    .landing-page .hero .lead {
        font-size: 1rem;
        padding: 0 1rem;
    }
    
    .landing-page .features {
        margin-top: 2rem;
    }
    
    .landing-page .features h2 {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: 1.5rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
    
    .feature-card h3 {
        font-size: 1.1rem;
        margin-bottom: 0.75rem;
    }
    
    .feature-image-title {
        font-size: 1rem;
    }
    
    .feature-image-summary {
        font-size: 0.85rem;
    }
    
    .feature-image-overlay {
        padding: 1rem 0.75rem 0.75rem;
    }
    
    .feature-card .wiki-links {
        gap: 0.5rem;
        margin-bottom: 1rem;
    }
    
    .feature-card .wiki-link {
        padding: 0.4rem 0.75rem;
        font-size: 0.85rem;
    }
    
    /* Blog Layout */
    .blog-layout {
        flex-direction: column;
        padding: 1rem;
        gap: 1.5rem;
    }
    
    .blog-sidebar {
        width: 100%;
        position: static;
        max-height: none;
        overflow-y: visible;
        padding: 1.5rem;
        order: 2;
    }
    
    .blog-content {
        order: 1;
        padding: 1.5rem;
    }
    
    .blog-header {
        margin-bottom: 1.5rem;
        padding-bottom: 1.5rem;
    }
    
    .blog-title {
        font-size: 1.5rem;
    }
    
    .blog-image img {
        max-width: 150px;
    }
    
    .article-title {
        font-size: 1.75rem;
        line-height: 1.3;
    }
    
    .article-summary {
        font-size: 1rem;
        padding: 0.75rem;
        margin: 1rem 0;
    }
    
    .article-link {
        padding: 0.75rem;
    }
    
    .article-link-title {
        font-size: 0.95rem;
    }
    
    .article-link-meta {
        font-size: 0.8rem;
    }
    
    /* Contact Page */
    .contact-page {
        padding: 1rem;
    }
    
    .contact-links {
        padding: 1rem;
        margin-bottom: 1.5rem;
    }
    
    .contact-links h2 {
        font-size: 1.25rem;
        margin-bottom: 0.75rem;
    }
    
    .nostr-profile {
        padding: 1rem;
        margin-bottom: 1.5rem;
    }
    
    .nostr-profile-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .nostr-profile-picture {
        width: 100px;
        height: 100px;
        margin-bottom: 1rem;
    }
    
    .nostr-profile-info {
        width: 100%;
    }
    
    .contact-form {
        margin-top: 1.5rem;
    }
    
    .form-group {
        margin-bottom: 1.25rem;
    }
    
    .form-group input[type="text"],
    .form-group textarea {
        padding: 0.625rem;
        font-size: 16px; /* Prevent zoom on iOS */
    }
    
    .form-group textarea {
        min-height: 120px;
    }
    
    .form-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    /* Buttons */
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.95rem;
        min-width: 44px; /* Touch target */
    }
    
    /* Full-width buttons in forms and feature cards */
    .form-actions .btn,
    .feature-card .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* Tables */
    table {
        font-size: 0.875rem;
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    thead, tbody, tr {
        display: table;
        width: 100%;
        table-layout: fixed;
    }
    
    th, td {
        padding: 0.5rem;
        word-break: break-word;
    }
    
    /* E-books table: show only avatar on mobile, narrow author column */
    .ebooks-table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .ebooks-table thead,
    .ebooks-table tbody,
    .ebooks-table tr {
        display: table;
        width: 100%;
        table-layout: fixed;
    }
    
    .ebooks-table th[data-sort="author"],
    .ebooks-table td:nth-child(2) {
        width: 60px;
        min-width: 60px;
        max-width: 60px;
        padding: 0.5rem;
        text-align: center;
    }
    
    .ebooks-table th:not([data-sort="author"]),
    .ebooks-table td:not(:nth-child(2)) {
        padding: 0.5rem;
    }
    
    .ebooks-table td .user-badge {
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 0;
        background: transparent;
        border: none;
        width: 100%;
    }
    
    .ebooks-table td .user-badge-name,
    .ebooks-table td .user-badge-handle {
        display: none !important;
    }
    
    .ebooks-table td .user-badge-avatar,
    .ebooks-table td .user-badge-avatar-placeholder {
        width: 40px;
        height: 40px;
        margin: 0;
    }
    
    .ebooks-table td .user-badge-avatar-placeholder .icon-inline {
        width: 20px;
        height: 20px;
    }
    
    /* Wiki Pages */
    .breadcrumbs {
        margin-bottom: 0.75rem;
        font-size: 0.875rem;
    }
    
    .breadcrumbs ol {
        flex-wrap: wrap;
        gap: 0.25rem;
    }
    
    .page-header {
        margin-bottom: 1.5rem;
        padding-bottom: 1rem;
    }
    
    .page-summary {
        font-size: 1rem;
    }
    
    .page-content {
        line-height: 1.7;
        font-size: 0.95rem;
    }
    
    /* Feed */
    .feed-container {
        padding: 1rem;
    }
    
    .feed-item {
        padding: 0.75rem 0;
    }
    
    .feed-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
    
    .feed-content {
        font-size: 0.85rem;
    }
    
    .feed-time {
        font-size: 0.8rem;
    }
    
    /* Error Pages */
    .error-page {
        padding: 2rem 1rem;
    }
    
    .error-page h1 {
        font-size: 3rem;
    }
    
    .error-page p {
        font-size: 1.1rem;
    }
    
    /* Footer */
    footer {
        padding: 1.5rem 1rem;
        font-size: 0.875rem;
    }
    
    /* Code blocks */
    pre {
        padding: 0.75rem;
        font-size: 0.85rem;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    code {
        font-size: 0.85rem;
        padding: 0.15rem 0.3rem;
    }
    
    /* Lists */
    ul, ol {
        margin-left: 1.5rem;
        margin-bottom: 0.75rem;
    }
    
    /* Logo */
    .logo {
        font-size: 1.1rem;
        margin-right: 1rem;
    }
    
    .logo-icon {
        width: 28px;
        height: 28px;
    }
    
    /* Touch-friendly targets */
    a, button {
        min-height: 44px; /* iOS recommended touch target */
        display: inline-flex;
        align-items: center;
    }
    
    .nav-menu a {
        min-height: 48px;
        padding: 0.75rem 0;
    }
    
    .wiki-menu a {
        min-height: 44px;
    }
    
    /* Images */
    img {
        max-width: 100%;
        height: auto;
    }
    
    /* Prevent horizontal scroll */
    body {
        overflow-x: hidden;
    }
    
    html {
        overflow-x: hidden;
    }
    
    /* Alerts */
    .alert {
        padding: 0.875rem;
        font-size: 0.9rem;
    }
    
    /* User badges */
    .user-badge {
        padding: 0.375rem 0.5rem;
    }
    
    .user-badge-avatar,
    .user-badge-avatar-placeholder {
        width: 20px;
        height: 20px;
    }
    
    /* Feed sidebar hidden on mobile but show on landing if needed */
    .landing-page .feed-section {
        margin: 1.5rem 0;
    }
}

/* Tablet styles (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    .feed-sidebar {
        width: 250px;
    }
    
    .wiki-sidebar {
        width: 200px;
    }
    
    .layout-container {
        padding: 1.5rem;
        gap: 1.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    /* Landing Page */
    .landing-page {
        padding: 1.5rem;
    }
    
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    /* Blog Layout */
    .blog-layout {
        padding: 1.5rem;
        gap: 2rem;
    }
    
    .blog-sidebar {
        width: 300px;
    }
    
    .blog-content {
        padding: 2rem;
    }
    
    /* Contact Page */
    .contact-page {
        padding: 1.5rem;
    }
    
    .nostr-profile-content {
        flex-direction: row;
        text-align: left;
    }
    
    .form-actions {
        flex-direction: row;
    }
    
    .form-actions .btn {
        width: auto;
    }
    
    /* Buttons */
    .btn {
        width: auto;
    }
    
    .feature-card .btn {
        width: auto;
    }
}

/* Desktop styles (> 1024px) */
@media (min-width: 1025px) {
    .feed-sidebar {
        display: block;
    }
    
    .layout-container {
        max-width: 1400px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --bg-primary: #1a1a1a;
        --bg-secondary: #0f0f0f;
        --text-primary: #ffffff;
        --text-secondary: #e0e0e0;
        --link-color: #9bb3ff;
        --border-color: #606060;
    }
}