/* style.css - Modern Dark Theme */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Dark Theme Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-hover: #2d3748;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Accent Colors */
    --accent-primary: #3b82f6;
    --accent-primary-hover: #2563eb;
    --accent-secondary: #8b5cf6;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #0ea5e9;
    
    /* Border Colors */
    --border-color: #334155;
    --border-light: #475569;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.2);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Z-index */
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-fixed: 30;
    --z-modal: 40;
    --z-popover: 50;
    --z-toast: 60;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.dark-theme {
    color-scheme: dark;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* Selection */
::selection {
    background-color: rgba(59, 130, 246, 0.3);
    color: var(--text-primary);
}

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

.desktop-text {
    display: inline;
}

.mobile-text {
    display: none;
}

/* Modern Navigation */
.modern-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: var(--z-fixed);
    height: 64px;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Left Navigation */
.nav-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.mobile-menu-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    user-select: none;
}

.logo i {
    font-size: 1.5rem;
    color: var(--accent-primary);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo span {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Center Navigation */
.nav-center {
    display: flex;
    gap: var(--spacing-xl);
    flex: 1;
    justify-content: center;
    max-width: 500px;
}

.nav-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    position: relative;
    min-width: 70px;
}

.nav-icon i {
    font-size: 1.5rem;
}

.nav-icon span {
    font-size: 0.75rem;
    font-weight: 500;
}

.nav-icon.active {
    color: var(--accent-primary);
}

.nav-icon.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: var(--radius-full);
}

.nav-icon:hover:not(.active) {
    color: var(--text-primary);
    background-color: var(--bg-hover);
}

/* Right Navigation */
.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.search-container {
    position: relative;
    width: 280px;
}

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

.search-bar:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-bar i {
    color: var(--text-muted);
    margin-right: var(--spacing-sm);
}

.search-bar input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.875rem;
    outline: none;
    width: 100%;
}

.search-bar input::placeholder {
    color: var(--text-muted);
}

.create-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.create-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.notification-bell {
    position: relative;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.notification-bell:hover {
    background-color: var(--bg-hover);
}

.notification-bell i {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background-color: var(--accent-danger);
    color: white;
    font-size: 0.625rem;
    font-weight: 700;
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-full);
    min-width: 18px;
    text-align: center;
    border: 2px solid var(--bg-secondary);
}

.nav-profile {
    position: relative;
    cursor: pointer;
    margin-left: var(--spacing-sm);
}

.nav-profile img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 2px solid var(--accent-primary);
}

.online-status {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 10px;
    height: 10px;
    background-color: var(--accent-success);
    border: 2px solid var(--bg-secondary);
    border-radius: var(--radius-full);
}

.mobile-search-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.mobile-search-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

/* Mobile Search Overlay */
.mobile-search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.95);
    z-index: var(--z-modal);
    display: none;
    align-items: flex-start;
    padding-top: 80px;
}

.mobile-search-container {
    width: 100%;
    padding: var(--spacing-lg);
}

.mobile-search-header {
    display: flex;
    align-items: center;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.mobile-search-header i {
    color: var(--text-muted);
    margin-right: var(--spacing-md);
}

.mobile-search-header input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
}

.close-search {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.close-search:hover {
    color: var(--text-primary);
}

.search-suggestions h4 {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 600;
}

.suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.suggestions span {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.suggestions span:hover {
    background-color: var(--accent-primary);
    color: white;
}

/* Mobile Navigation Menu */
.mobile-nav-menu {
    position: fixed;
    top: 0;
    left: -100%;
    width: 300px;
    height: 100vh;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    z-index: var(--z-modal);
    transition: var(--transition-normal);
    overflow-y: auto;
}

.mobile-nav-menu.active {
    left: 0;
}

.mobile-nav-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.mobile-user-info img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.mobile-user-info h4 {
    font-weight: 600;
    margin-bottom: 2px;
}

.mobile-user-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.close-mobile-menu {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.close-mobile-menu:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.mobile-nav-links {
    padding: var(--spacing-lg) 0;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    position: relative;
}

.mobile-nav-link:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.mobile-nav-link.active {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
    border-right: 3px solid var(--accent-primary);
}

.mobile-nav-link i {
    font-size: 1.25rem;
    width: 24px;
}

.notification-count {
    margin-left: auto;
    background-color: var(--accent-danger);
    color: white;
    font-size: 0.75rem;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
}

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

.mobile-create-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.mobile-create-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Main Layout */
.modern-main {
    margin-top: 64px;
    padding: var(--spacing-lg);
    min-height: calc(100vh - 64px);
}

.main-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 280px 1fr 320px;
    gap: var(--spacing-lg);
}

/* Left Sidebar */
.sidebar-left {
    position: sticky;
    top: 80px;
    height: calc(100vh - 96px);
    overflow-y: auto;
}

.user-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.user-cover {
    height: 100px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    position: relative;
}

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

.edit-cover {
    position: absolute;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    background-color: rgba(0, 0, 0, 0.5);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.edit-cover:hover {
    background-color: rgba(0, 0, 0, 0.7);
}

.user-info {
    padding: var(--spacing-lg);
    text-align: center;
    position: relative;
    margin-top: -40px;
}

.profile-img {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    border: 4px solid var(--bg-card);
    margin: 0 auto var(--spacing-md);
    position: relative;
}

.profile-img img {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.online-dot {
    position: absolute;
    bottom: 8px;
    right: 8px;
    width: 12px;
    height: 12px;
    background-color: var(--accent-success);
    border: 2px solid var(--bg-card);
    border-radius: var(--radius-full);
}

.edit-profile {
    position: absolute;
    bottom: -4px;
    right: -4px;
    background-color: var(--accent-primary);
    border: none;
    color: white;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.edit-profile:hover {
    background-color: var(--accent-primary-hover);
}

.user-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.username {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
}

.user-stats {
    display: flex;
    justify-content: space-around;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.user-stats div {
    text-align: center;
}

.user-stats strong {
    display: block;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.user-stats span {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Sidebar Menu */
.sidebar-menu {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    margin-bottom: 2px;
    position: relative;
}

.menu-item i {
    font-size: 1.25rem;
    width: 24px;
}

.menu-item span {
    font-weight: 500;
    font-size: 0.9375rem;
}

.menu-item.active {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
}

.menu-item:hover:not(.active) {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

/* Create Post Sidebar */
.create-post-sidebar {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.btn-create {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-create:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Sidebar Footer */
.sidebar-footer {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
}

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

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    transition: var(--transition-fast);
    border-radius: var(--radius-full);
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-fast);
    border-radius: var(--radius-full);
}

input:checked + .slider {
    background-color: var(--accent-primary);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

/* Main Feed */
.main-feed {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Create Post Card */
.create-post-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
}

.post-input {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.post-input img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.post-input input {
    flex: 1;
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: var(--transition-fast);
}

.post-input input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

.post-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
}

.post-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

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

.post-option i {
    font-size: 1.25rem;
}

.post-option:nth-child(1) i { color: var(--accent-success); }
.post-option:nth-child(2) i { color: var(--accent-danger); }
.post-option:nth-child(3) i { color: var(--accent-warning); }

.post-btn {
    padding: var(--spacing-sm) var(--spacing-xl);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.post-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Stories Section */
.stories-section {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
}

.stories-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.stories-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.see-all {
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.see-all:hover {
    text-decoration: underline;
}

.stories-container {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    padding: var(--spacing-sm) 0;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.stories-container::-webkit-scrollbar {
    display: none;
}

.story-card {
    flex-shrink: 0;
    width: 100px;
    height: 180px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    cursor: pointer;
    border: 2px solid var(--accent-primary);
}

.story-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.story-card:hover img {
    transform: scale(1.05);
}

.story-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40%;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
}

.story-card p {
    position: absolute;
    bottom: var(--spacing-md);
    left: 0;
    right: 0;
    text-align: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    z-index: 1;
    padding: 0 var(--spacing-sm);
}

.create-story {
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-hover));
    border: 2px dashed var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.add-story {
    width: 48px;
    height: 48px;
    background: var(--accent-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.add-story i {
    font-size: 1.5rem;
    color: white;
}

.create-story p {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Feed Posts */
.feed-posts {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Post Card */
.post-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.post-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

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

.post-author img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.post-author h4 {
    font-weight: 600;
    margin-bottom: 4px;
}

.post-author p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.post-actions-dropdown {
    position: relative;
}

.post-menu {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

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

.dropdown-content {
    position: absolute;
    top: 100%;
    right: 0;
    width: 200px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    display: none;
}

.dropdown-content a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    border-bottom: 1px solid var(--border-color);
}

.dropdown-content a:last-child {
    border-bottom: none;
}

.dropdown-content a:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.dropdown-content a i {
    font-size: 1.125rem;
}

.dropdown-content a.report {
    color: var(--accent-danger);
}

.post-actions-dropdown:hover .dropdown-content {
    display: block;
}

/* Post Content */
.post-content {
    padding: var(--spacing-lg);
}

.post-content p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.tag:hover {
    background-color: rgba(59, 130, 246, 0.2);
}

/* Post Image */
.post-image {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.post-image:hover img {
    transform: scale(1.02);
}

.image-overlay {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    opacity: 0;
    transition: var(--transition-fast);
}

.post-image:hover .image-overlay {
    opacity: 1;
}

.fullscreen-btn {
    background-color: rgba(0, 0, 0, 0.5);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.fullscreen-btn:hover {
    background-color: rgba(0, 0, 0, 0.7);
}

/* Post Stats */
.post-stats {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

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

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

.reaction-icon {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.reaction-icon:hover {
    transform: scale(1.2);
}

.reaction-count {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-left: var(--spacing-sm);
}

.comments-count, .shares-count {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.comments-count:hover, .shares-count:hover {
    color: var(--text-primary);
}

.comments-count i, .shares-count i {
    font-size: 1.125rem;
}

/* Post Actions */
.post-actions {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background-color: var(--border-color);
}

.post-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--bg-card);
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    font-weight: 500;
}

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

.post-action i {
    font-size: 1.25rem;
}

.post-action.like-btn[data-liked="true"] {
    color: var(--accent-primary);
}

.post-action.save-btn[data-saved="true"] {
    color: var(--accent-warning);
}

/* Comments Preview */
.comments-preview {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.comment-input {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.comment-input img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.comment-input input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: var(--transition-fast);
}

.comment-input input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.comment-input input::placeholder {
    color: var(--text-muted);
}

/* Right Sidebar */
.sidebar-right {
    position: sticky;
    top: 80px;
    height: calc(100vh - 96px);
    overflow-y: auto;
}

/* Widgets */
.widget {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.widget-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.widget-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.online-count {
    background-color: var(--accent-primary);
    color: white;
    font-size: 0.75rem;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
}

/* Friend Requests */
.request-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
}

.request-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.request-item img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.request-info {
    flex: 1;
}

.request-info h4 {
    font-weight: 600;
    margin-bottom: 4px;
}

.request-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

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

.btn-accept, .btn-decline {
    padding: 0.375rem 0.75rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-accept {
    background-color: var(--accent-primary);
    color: white;
}

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

.btn-decline {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.btn-decline:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

/* Online Friends */
.online-friends {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.online-friend {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

.online-friend:hover {
    background-color: var(--bg-hover);
}

.friend-avatar {
    position: relative;
}

.friend-avatar img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.friend-avatar .online-dot {
    position: absolute;
    bottom: 2px;
    right: 2px;
    width: 10px;
    height: 10px;
    background-color: var(--accent-success);
    border: 2px solid var(--bg-card);
}

.online-friend span {
    font-weight: 500;
    font-size: 0.9375rem;
}

/* Trending Topics */
.trending-topics {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.trending-topic {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

.trending-topic:hover {
    background-color: var(--bg-hover);
}

.trend-number {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-muted);
    min-width: 2rem;
}

.trending-topic h4 {
    font-weight: 600;
    margin-bottom: 2px;
}

.trending-topic p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Birthday Widget */
.birthday-widget {
    background: linear-gradient(135deg, #8b5cf6, #a78bfa);
    color: white;
}

.birthday-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.birthday-icon i {
    font-size: 2rem;
}

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

.birthday-content p {
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

.btn-birthday {
    width: 100%;
    padding: var(--spacing-md);
    background: white;
    color: #8b5cf6;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-birthday:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Notifications Panel */
.notifications-panel {
    position: fixed;
    top: 64px;
    right: -400px;
    width: 380px;
    height: calc(100vh - 64px);
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    z-index: var(--z-modal);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.notifications-panel.show {
    right: 0;
}

.notifications-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.notifications-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.mark-all-read {
    background: none;
    border: none;
    color: var(--accent-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.mark-all-read:hover {
    background-color: var(--bg-hover);
}

.close-notifications {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.close-notifications:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.notifications-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.notifications-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.view-all {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition-fast);
}

.view-all:hover {
    text-decoration: underline;
}

/* Messages Panel */
.messages-panel {
    position: fixed;
    top: 64px;
    right: -400px;
    width: 380px;
    height: calc(100vh - 64px);
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    z-index: var(--z-modal);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.messages-panel.show {
    right: 0;
}

.messages-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.messages-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.new-message, .close-messages {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.new-message:hover, .close-messages:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.messages-search {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.messages-search i {
    position: absolute;
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.messages-search input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 3rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: var(--transition-fast);
}

.messages-search input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.messages-tabs {
    display: flex;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    gap: 1px;
    background-color: var(--border-color);
}

.tab {
    flex: 1;
    padding: var(--spacing-sm);
    background-color: var(--bg-secondary);
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.tab.active {
    background-color: var(--accent-primary);
    color: white;
}

.tab:hover:not(.active) {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.tab.requests {
    position: relative;
}

.tab.requests span {
    position: absolute;
    top: -8px;
    right: -8px;
    background-color: var(--accent-danger);
    color: white;
    font-size: 0.75rem;
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-full);
}

.conversations-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

/* Theme Modal */
.theme-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.theme-modal.show {
    opacity: 1;
    visibility: visible;
}

.theme-content {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
}

.theme-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.theme-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.close-theme {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.close-theme:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.theme-options {
    padding: var(--spacing-xl);
}

.theme-option {
    margin-bottom: var(--spacing-xl);
}

.theme-option h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.color-options {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.color-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.color-preview {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: 3px solid transparent;
    transition: var(--transition-fast);
}

.color-option.active .color-preview {
    border-color: var(--text-primary);
    transform: scale(1.1);
}

.color-option[data-color="blue"] .color-preview {
    background-color: #3b82f6;
}

.color-option[data-color="purple"] .color-preview {
    background-color: #8b5cf6;
}

.color-option[data-color="green"] .color-preview {
    background-color: #10b981;
}

.color-option[data-color="red"] .color-preview {
    background-color: #ef4444;
}

.color-option[data-color="orange"] .color-preview {
    background-color: #f59e0b;
}

.color-option span {
    font-size: 0.875rem;
    font-weight: 500;
}

.dark-mode-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.density-options {
    display: flex;
    gap: var(--spacing-sm);
}

.density-option {
    flex: 1;
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.density-option.active {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.density-option:hover:not(.active) {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

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

.btn-reset, .btn-apply {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-reset {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.btn-reset:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.btn-apply {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

.btn-apply:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Bottom Mobile Navigation */
.bottom-mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    display: none;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    z-index: var(--z-fixed);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.mobile-nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-decoration: none;
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    position: relative;
    min-width: 60px;
}

.mobile-nav-btn.active {
    color: var(--accent-primary);
}

.mobile-nav-btn i {
    font-size: 1.25rem;
}

.mobile-nav-btn span {
    font-size: 0.625rem;
    font-weight: 500;
}

.create-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: -20px;
    box-shadow: var(--shadow-md);
}

.create-icon i {
    color: white;
    font-size: 1.5rem;
}

.mobile-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background-color: var(--accent-danger);
    color: white;
    font-size: 0.625rem;
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-full);
    min-width: 16px;
    text-align: center;
}

/* Create Post Modal */
.create-post-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.create-post-modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.close-modal:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

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

.post-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.post-author img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.post-author h4 {
    font-weight: 600;
    margin-bottom: 4px;
}

.privacy-select {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.privacy-select:hover {
    background-color: var(--bg-hover);
}

.modal-body textarea {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 1rem;
    resize: vertical;
    transition: var(--transition-fast);
    margin-bottom: var(--spacing-lg);
}

.modal-body textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.post-attachments {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.attachment-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.attachment-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

.btn-cancel {
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-cancel:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.btn-post {
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-post:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Responsive Design */

/* Large Desktop */
@media (min-width: 1600px) {
    .nav-container,
    .main-container {
        max-width: 1600px;
    }
}

/* Desktop */
@media (max-width: 1200px) {
    .main-container {
        grid-template-columns: 280px 1fr;
    }
    
    .sidebar-right {
        display: none;
    }
    
    .nav-center {
        max-width: 400px;
    }
    
    .search-container {
        width: 200px;
    }
}

/* Tablet Landscape */
@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .sidebar-left {
        position: static;
        height: auto;
        margin-bottom: 0;
    }
    
    .nav-center {
        display: none;
    }
    
    .search-container {
        display: none;
    }
    
    .mobile-search-btn {
        display: block;
    }
    
    .create-btn .desktop-text {
        display: none;
    }
    
    .create-btn {
        padding: var(--spacing-sm);
    }
    
    .bottom-mobile-nav {
        display: flex;
    }
    
    .modern-main {
        padding-bottom: 80px;
    }
}

/* Tablet Portrait */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--spacing-md);
        gap: var(--spacing-md);
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .logo h1 {
        font-size: 1.25rem;
    }
    
    .modern-main {
        padding: var(--spacing-md);
        padding-bottom: 80px;
    }
    
    .post-options {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .post-option .desktop-text {
        display: none;
    }
    
    .post-option {
        padding: var(--spacing-sm);
    }
    
    .post-btn {
        width: 100%;
        margin-top: var(--spacing-sm);
    }
    
    .stories-container {
        gap: var(--spacing-sm);
    }
    
    .story-card {
        width: 80px;
        height: 150px;
    }
    
    .post-image {
        height: 300px;
    }
    
    .post-actions {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .post-action .action-text {
        display: none;
    }
    
    .widget {
        padding: var(--spacing-md);
    }
    
    .notifications-panel,
    .messages-panel {
        width: 100%;
        right: -100%;
    }
}

/* Mobile */
@media (max-width: 576px) {
    .nav-container {
        padding: 0 var(--spacing-sm);
    }
    
    .logo i {
        font-size: 1.25rem;
    }
    
    .logo h1 {
        font-size: 1.125rem;
    }
    
    .modern-main {
        padding: var(--spacing-sm);
        padding-bottom: 80px;
    }
    
    .user-card,
    .sidebar-menu,
    .create-post-sidebar,
    .sidebar-footer,
    .create-post-card,
    .stories-section,
    .post-card,
    .widget {
        border-radius: var(--radius-md);
    }
    
    .post-header,
    .post-content,
    .post-stats,
    .comments-preview {
        padding: var(--spacing-md);
    }
    
    .post-image {
        height: 200px;
    }
    
    .stories-section {
        padding: var(--spacing-md);
    }
    
    .story-card {
        width: 70px;
        height: 130px;
    }
    
    .reactions {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .theme-content,
    .modal-content {
        width: 95%;
    }
    
    .theme-header,
    .modal-header {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .theme-options,
    .modal-body {
        padding: var(--spacing-md);
    }
    
    .theme-actions,
    .modal-footer {
        padding: var(--spacing-md);
    }
    
    .color-options {
        justify-content: center;
    }
    
    .post-attachments {
        grid-template-columns: 1fr;
    }
}

/* Small Mobile */
@media (max-width: 375px) {
    .nav-profile img {
        width: 32px;
        height: 32px;
    }
    
    .badge {
        font-size: 0.5rem;
        padding: 0.125rem 0.25rem;
        min-width: 14px;
    }
    
    .story-card {
        width: 60px;
        height: 120px;
    }
    
    .story-card p {
        font-size: 0.75rem;
    }
    
    .add-story {
        width: 32px;
        height: 32px;
    }
    
    .add-story i {
        font-size: 1.25rem;
    }
}