/* Uncent - Core Layout and Structure */
/* Essential layout, grid, and structural styles - rarely needs customization */

:root {
    --sidebar-width: 280px;
    --right-sidebar-width: 320px;
    --sidebar-border: var(--border-color);
    --nav-active: var(--primary-color);
    --nav-active-bg: var(--bg-tertiary);
    --plugin-bg: var(--bg-secondary);
}

/* Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: normal;
    color: var(--text-color);
    background-color: var(--bg-color);
    background-image: var(--bg-image);
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr var(--right-sidebar-width);
    grid-template-rows: 100vh;
    overflow: hidden;
}

/* Container and Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

/* =================================================================
   SIDEBAR LAYOUT SYSTEM
   ================================================================= */

/* Mobile-only elements */
.mobile-only {
    display: none;
}

/* Left Sidebar Navigation */
.left-sidebar {
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    width: var(--sidebar-width);
    z-index: 50;
    overflow-y: auto;
}

.sidebar-header {
    border-bottom: 1px solid var(--sidebar-border);
    background: var(--sidebar-bg-header);
    position: sticky;
    top: 0;
    z-index: 10;
}

/* Navigation Styles */
.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
}

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

.nav-item {
    margin: 0.25rem 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    border-radius: var(--nav-border-radius);
    margin-right: 1rem;
    transition: all 0.2s ease;
    font-weight: 500;
    position: relative;
}

.nav-link:hover {
    background: var(--bg-tertiary);
    outline: 2px solid var(--primary-color);
    outline-offset: -2px;
    text-decoration: none;
}

.nav-link.active {
    background: var(--primary-color);
    color: var(--text-light);
    text-decoration: none;
}

.nav-link.admin-link {
    color: var(--danger-color);
    border-right: var(--nav-border-radius) solid var(--danger-color);
    margin: 1rem 1rem 1rem 0;
}

.nav-link.admin-link:hover {
    background: #fef5e7;
    color: #c53030;
}

.nav-icon {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

.nav-text {
    font-size: 0.95rem;
}

/* === NAVIGATION STYLES === */
.nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    border-right: var(--nav-border-radius);
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--sidebar-border);
    margin-top: auto;
}

.sidebar-user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: 12px;
    background: var(--plugin-bg);
}

.user-avatar-small {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-status {
    font-size: 0.8rem;
    color: var(--success-color);
}

/* Main Content Area */
.main-content {
    grid-column: 2;
    overflow-y: auto;
    height: 100vh;
    padding: 0;
}

.full-content {
    grid-column: 1;
    overflow-y: auto;
    height: 100vh;
    padding: 0;
}

.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

/* Right Sidebar Plugins */
.right-sidebar {
    background: var(--sidebar-bg);
    border-left: 1px solid var(--sidebar-border);
    position: fixed;
    right: 0;
    top: 0;
    height: 100vh;
    width: var(--right-sidebar-width);
    overflow-y: auto;
    z-index: 50;
    padding: 0;
}

.sidebar-section {
    margin-bottom: 1.5rem;
    background: white;
    border-radius: 12px;
    margin: 0.75rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
}

.sidebar-section:first-child {
    margin-top: 1rem;
}

.section-title {
    padding: 1rem 1rem 0.5rem;
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

/* User Section in Right Sidebar */
.user-section {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: var(--text-light);
    border: none;
}

.user-section .section-title {
    color: var(--text-light);
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

/* =================================================================
   LEGACY LAYOUT SYSTEM (for backward compatibility)
   ================================================================= */

/* Header Structure - Legacy */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--box-shadow);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.logo img {
    width: 90%;
    height: auto;
    max-height: 100px;
}

/* Navigation Structure - Legacy */
.nav {
    display: flex;
    gap: var(--spacing-lg);
}

.user-menu {
    position: relative;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: background 0.2s;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 150px;
    z-index: 1000;
}

/* Main Content Structure */
.main {
    padding: var(--spacing-lg) 0;
    min-height: calc(100vh - 80px);
}

.sidebar {
    position: sticky;
    top: 100px;
}

.content {
    min-width: 0; /* Prevents flex item from overflowing */
}

/* Page Structure */
.page {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

.page.active, .page#landing-page {
    display: block;
}

.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    margin: 0;
    color: var(--text-color);
    font-size: 1.5rem;
    font-weight: 600;
}

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

/* Enhanced Post Form */
.post-form {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
    text-align: right;
}

.post-form textarea {
    width: 100%;
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.5;
    outline: none;
    background: var(--input-bg);
    color: var(--text-color);
}

.post-form textarea::placeholder {
    color: var(--text-muted);
}

.post-form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.post-options {
    display: flex;
    gap: 0.5rem;
}

.option-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.5rem;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-color);
}

.option-btn:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

/* Loading and Empty States */
.loading-spinner {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.empty-state h3 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

/* User Menu in Right Sidebar */
.user-menu .user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: background 0.2s ease;
}

.user-menu .user-info:hover {
    background: rgba(255, 255, 255, 0.1);
}

.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.dropdown-arrow {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.8);
}

.user-dropdown {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    z-index: 1000;
    overflow: hidden;
    display: none;
}

.user-dropdown.show {
    display: block;
}

.user-dropdown a,
.user-dropdown button {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    text-align: left;
    border: none;
    background: none;
    color: var(--text-color);
    text-decoration: none;
    transition: background 0.2s ease;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
}

.user-dropdown a:last-child,
.user-dropdown button:last-child {
    border-bottom: none;
}

.user-dropdown a:hover,
.user-dropdown button:hover {
    background: var(--bg-secondary);
}

.admin-link {
    color: var(--danger-color) !important;
    font-weight: 600;
}

/* Quick Actions Plugin */
.quick-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
}

.quick-action-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    width: 100%;
}

.quick-action-btn:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
    box-shadow: var(--box-shadow);
}

.action-icon {
    font-size: 1.1rem;
}

.action-text {
    font-weight: 500;
    color: var(--text-color);
}

/* Plugin Placeholders */
.plugin-placeholder {
    background: var(--plugin-bg);
    margin: 1rem;
}

/* Calendar Plugin */
.plugin-mini-calendar {
    text-align: center;
}

.calendar-header {
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.calendar-day {
    margin-bottom: 0.75rem;
}

.day-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.day-name {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.calendar-events {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Music Player Plugin */
.music-player {
    background: linear-gradient(135deg, #1db954, #1ed760);
    border-radius: var(--border-radius);
    padding: 1rem;
    color: var(--text-light);
}

.now-playing {
    margin-bottom: 1rem;
}

.track-title {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.track-artist {
    font-size: 0.8rem;
    opacity: 0.9;
}

.player-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.control-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.play-btn {
    background: rgba(255, 255, 255, 0.3);
    font-size: 1rem;
}

/* Video Playlist Plugin */
.video-playlist {
    background: #ff0000;
    border-radius: var(--border-radius);
    padding: 1rem;
    color: var(--text-light);
}

.playlist-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.playlist-title {
    font-weight: 600;
    font-size: 0.9rem;
}

.playlist-add {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    color: white;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.playlist-add:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.playlist-items {
    max-height: 200px;
    overflow-y: auto;
}

.playlist-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background 0.2s ease;
}

.playlist-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.video-thumbnail {
    width: 40px;
    height: 30px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.video-info {
    flex: 1;
    min-width: 0;
}

.video-title {
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.video-duration {
    font-size: 0.7rem;
    opacity: 0.8;
}

/* Activity Feed Plugin */
.activity-feed {
    padding: 1rem;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.activity-item:hover {
    background: var(--bg-secondary);
    transform: translateX(4px);
}

.activity-item:last-child {
    margin-bottom: 0;
}

.activity-icon {
    font-size: 1.1rem;
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    color: var(--text-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.activity-text {
    font-size: 0.9rem;
    color: var(--text-color);
    flex: 1;
}

#toast-message {
    background: var(--success-color);
    color: var(--text-light);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transform: translateY(-100px);
    transition: all 0.3s ease;
    opacity: 0;
    white-space: nowrap;
}

#toast-message.show {
    transform: translateY(0);
    opacity: 1;
}

/* =================================================================
   LEGACY STRUCTURES (Modal, Post, Comments, etc.)
   ================================================================= */

/* Modal Structure */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    animation: slideIn 0.3s ease-out;
}

.modal-content.large {
    max-width: 700px;
}

@keyframes slideIn {
    from { transform: translateY(-20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
}

.modal-body {
    padding: var(--spacing-lg);
}

/* Post Structure */
.post {
    margin-bottom: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.post-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
}

.post-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
}

.author-info {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.author-info time {
    flex: 0 1 100%;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
}

.author-node {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: inline-block;
}

.post-content {
    padding: var(--spacing-md);
}

.post-actions {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-top: 1px solid var(--border-color);
    gap: var(--spacing-lg);
}

.post-action {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
}

.post-action:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.post-action.liked,
.post-action.liked .icon-heart {
    color: var(--error-color);
}

.post-action i {
    font-size: 1rem;
}

.post-action:last-child {
    margin-left: auto;
    margin-right: 0;
}

.post-meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.privacy-indicator {
    font-size: 0.8rem;
}

.post-content {
    padding: 0 var(--spacing-md) var(--spacing-md);
    line-height: 1.6;
    color: var(--text-primary);
}

.post-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.post-content a:hover {
    text-decoration: underline;
}

.mention {
    color: var(--primary-color);
    font-weight: 500;
}

.hashtag {
    color: var(--accent-color);
    font-weight: 500;
}

.post-media {
    display: grid;
    gap: var(--spacing-xs);
    margin: 0 var(--spacing-md) var(--spacing-md);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.post-media img,
.video-thumbnail {
    width: 100%;
    height: 200px;
    object-fit: cover;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.post-media img:hover {
    opacity: 0.9;
}

.comment-author {
    display: flex;
    gap: 10px;
    margin-bottom: 8px;
}

.comment-author-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.comment-author-name {
    display: flex;
    align-items: center;
    gap: 4px;
}

.comment-display-name {
    font-weight: 600;
}

.comment-node {
    color: #666;
    font-size: 0.9em;
}

.comment-time {
    color: #999;
    font-size: 0.85em;
}

.video-thumbnail {
    position: relative;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.media-more {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.media-more:hover {
    background: var(--bg-primary);
}

/* Comments Structure */
.comments {
    background: var(--bg-secondary);
}

.comment {
    padding: var(--spacing-md);
    position: relative;
}

.comment.reply {
    margin-left: var(--spacing-xl);
    border-left: 2px solid var(--border-color);
}

.comment-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.comment-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.comment-form {
    padding: var(--spacing-md);
}

/* Profile Structure */
.profile-header {
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.profile-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.profile-details {
    flex: 1;
}

.profile-stats {
    display: flex;
    gap: var(--spacing-lg);
}

/* Friends Structure */
.friends-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.friends-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.friends-tabs {
    display: flex;
    margin-bottom: var(--spacing-lg);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.friend-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    transition: all 0.2s;
}

.friend-info {
    flex: 1;
}

.friend-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* Settings Structure */
.settings-header {
    margin-bottom: var(--spacing-lg);
}

.settings-page {
    max-width: 600px;
    margin: 0 auto;
}

.settings-section {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.settings-section h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.settings-section p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

#theme-selector {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.setting-item {
    margin-bottom: var(--spacing-md);
}

.setting-item:last-child {
    margin-bottom: 0;
}

/* Form Structure */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
}

/* Rich Text Editor Structure */
.rich-text-editor {
    overflow: hidden;
}

.editor-toolbar {
    display: flex;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
}

/* Photo Upload Structure */
.photo-upload {
    margin-top: var(--spacing-md);
}

.photo-previews {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.photo-preview {
    position: relative;
    width: 100px;
    height: 100px;
    overflow: hidden;
}

.photo-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.photo-preview-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 20px;
    height: 20px;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* QR Code Structure */
.qr-container {
    text-align: center;
}

.qr-container img {
    max-width: 200px;
    margin-bottom: var(--spacing-md);
}

.share-url {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.share-url input {
    flex: 1;
}

/* =================================================================
   NOTIFICATION SYSTEM (separate from content)
   ================================================================= */

.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 400px;
    pointer-events: none; /* Allow clicks through container */
}

.notification {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    transform: translateX(100%);
    transition: transform 0.3s ease-out;
    pointer-events: auto; /* Allow clicks on notifications */
    min-width: 300px;
}

.notification.show {
    transform: translateX(0);
}

.notification-success {
    background: var(--success-color);
    color: white;
    border-left: 4px solid var(--success-color);
}

.notification-error {
    background: var(--error-color);
    color: white;
    border-left: 4px solid var(--error-color);
}

.notification-info {
    background: var(--primary-color);
    color: white;
    border-left: 4px solid var(--primary-color);
}

.notification-warning {
    background: var(--warning-color);
    color: white;
    border-left: 4px solid var(--warning-color);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
}

.notification-close {
    background: none;
    border: none;
    color: currentColor;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease;
    font-size: 1.2rem;
    line-height: 1;
}

.notification-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* CONTENT CONTAINERS (for posts, comments, etc.) */

.feed-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.posts-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.profile-posts-preview {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.profile-media-preview {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

/* Toast Structure */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: var(--spacing-md);
    z-index: 2000;
    max-width: 400px;
    transform: translateX(500px);
    transition: transform 0.3s ease-out;
}

.toast.show {
    transform: translateX(0);
}

.toast-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.toast-message {
    flex: 1;
    margin-right: var(--spacing-sm);
}

/* Loading States Structure */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
    gap: var(--spacing-sm);
}

.loading::before {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.no-content {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
    font-style: italic;
}

.error-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--error-color);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    margin: var(--spacing-md) 0;
}

.error-state button {
    margin-top: var(--spacing-md);
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.error-state button:hover {
    background: var(--primary-color-hover);
}

.feed-empty {
    text-align: center;
    padding: var(--spacing-xl);
}


/* Mobile overlay for sidebar */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

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

/* Mobile header styling */
.mobile-only {
    display: none;
}

.mobile-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--header-bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
    height: var(--mobile-header-height, 60px);
}

.mobile-menu-btn,
.mobile-user-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    padding: 0.5rem;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-user-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    font-weight: bold;
    font-size: 1rem;
}

.mobile-logo {
    height: 40px;
    width: auto;
}

/* =================================================================
   RESPONSIVE DESIGN
   ================================================================= */

@media (max-width: 1200px) {
    body {
        grid-template-columns: var(--sidebar-width) 1fr;
    }
    
    .right-sidebar {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 240px;
        --mobile-header-height: 60px; /* Define mobile header height */
    }
    
    .mobile-only {
        display: block;
    }
    
    .mobile-logo {
        height: 60px;
        width: auto;
    }
    
    body {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr; /* Change from 100vh to auto + 1fr */
        position: relative;
        overflow: hidden; /* Keep this to prevent double scrollbars */
    }
    
    .left-sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 100;
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: var(--sidebar-width, 280px);
    }
    
    .left-sidebar.open {
        transform: translateX(0);
    }
    
    /* Mobile header should be in grid row 1 */
    .mobile-only {
        grid-row: 1;
        grid-column: 1;
    }
    
    .mobile-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem;
        background: var(--header-bg-color);
        border-bottom: 1px solid var(--border-color);
        position: sticky;
        top: 0;
        z-index: 10;
        height: var(--mobile-header-height);
    }
    
    /* Main content should be in grid row 2 and account for header */
    .main-content {
        grid-column: 1;
        grid-row: 2;
        margin-left: 0;
        height: calc(100vh - var(--mobile-header-height)); /* Subtract header height */
        overflow-y: auto;
        overflow-x: hidden;
    }
    
    .content-wrapper {
        padding: 1rem;
        min-height: 100%; /* Ensure it fills available space */
    }
    
    .sidebar-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    
    .mobile-menu-toggle {
        display: block;
        background: none;
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        color: var(--text-color);
    }
    
    .nav-text {
        font-size: 0.9rem;
    }
    
    /* Mobile overlay */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 99;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    /* Hide right sidebar on mobile */
    .right-sidebar {
        display: none;
    }
}

@media (max-width: 480px) {
    .content-wrapper {
        padding: 0.5rem;
    }
    
    .post-form {
        margin-bottom: 1rem;
        padding: 1rem;
    }
    
    .post-form-actions {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .post-options {
        justify-content: center;
    }
    
    .page-header h1 {
        font-size: 1.25rem;
    }
    
    /* Legacy mobile adjustments */
    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .post-actions {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .tab-btn {
        flex: 1;
        text-align: center;
    }
}

/* Print Layout */
@media print {
    .left-sidebar,
    .right-sidebar,
    #toast-container,
    .mobile-header {
        display: none !important;
    }
    
    body {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        margin: 0;
        padding: 0;
    }
    
    .content-wrapper {
        max-width: none;
        padding: 0;
    }
    
    .post-form {
        display: none;
    }
    
    /* Legacy print styles */
    .header,
    .sidebar,
    .modal,
    .toast,
    .post-actions,
    .comment-actions {
        display: none !important;
    }
    
    .main {
        padding: 0;
    }
    
    .post {
        break-inside: avoid;
        box-shadow: none;
    }
}

/* Utility Classes for Layout */
.hidden { 
    display: none !important; 
}

.sr-only { 
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    border: 0 !important;
}