:root {
    /* Color variables */
    --primary-color: #FFCC00;
    --primary-dark: #FFBB00;
    --primary-light: #FFDD33;
    --secondary-color: #000000;
    --secondary-light: #333333;
    --accent-color: #3498db;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #ffffff;
    --bg-light: #ffffff;
    --bg-gray: #f5f5f5;
    --border-color: #e0e0e0;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-circle: 50%;
    
    /* Shadow */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.2s;
    --transition-normal: 0.3s;
    --transition-slow: 0.5s;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-light);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-color);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-size: 0.9rem;
    gap: var(--spacing-sm);
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: var(--secondary-color);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-light);
}

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

.btn-danger {
    background-color: var(--danger-color);
    color: var(--text-light);
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-success {
    background-color: var(--success-color);
    color: var(--text-light);
}

.btn-success:hover {
    background-color: #27ae60;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-circle);
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

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

.btn-circle {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input:not([type="file"]),
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-row {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

.password-input {
    position: relative;
}

.password-input .toggle-password {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
}

.password-input .toggle-password:hover {
    color: var(--primary-color);
}

/* Alert Styles */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.alert-success {
    background-color: rgba(46, 204, 113, 0.2);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.alert-danger {
    background-color: rgba(231, 76, 60, 0.2);
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
}

/* Layout - App Structure */
.app-container {
    display: grid;
    grid-template-columns: 250px 1fr 280px;
    min-height: 100vh;
}

.main-content {
    padding: var(--spacing-lg);
    background-color: var(--bg-gray);
    overflow-y: auto;
}

.content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background-color: var(--bg-light);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    z-index: 100;
}

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

.toggle-sidebar {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--text-secondary);
    display: none;
}

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

.logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #3498db 100%);
    border-radius: var(--radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--text-light);
    font-size: 1.2rem;
}

.app-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.search-container {
    flex: 1;
    max-width: 500px;
    margin: 0 var(--spacing-lg);
}

.search-box {
    position: relative;
    width: 100%;
}

.search-box input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 40px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background-color: var(--bg-gray);
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    background-color: var(--bg-light);
    border-color: var(--primary-color);
}

.search-box i {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

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

.header-icon-btn {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-gray);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.header-icon-btn:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.badge {
    position: absolute;
    top: -5px;
    right: -5px;
    width: 18px;
    height: 18px;
    background-color: var(--danger-color);
    color: var(--text-light);
    border-radius: var(--radius-circle);
    font-size: 0.7rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.user-menu {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-circle);
    overflow: hidden;
    cursor: pointer;
    position: relative;
}

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

.user-avatar.large {
    width: 80px;
    height: 80px;
}

.user-avatar.small {
    width: 32px;
    height: 32px;
}

.status-indicator {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 12px;
    height: 12px;
    border-radius: var(--radius-circle);
    border: 2px solid var(--bg-light);
}

.status-indicator.online {
    background-color: var(--success-color);
}

.user-dropdown {
    position: absolute;
    top: 50px;
    right: 0;
    width: 200px;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    z-index: 100;
    overflow: hidden;
    display: none;
}

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

.user-dropdown ul {
    padding: var(--spacing-sm) 0;
}

.user-dropdown li a {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    gap: var(--spacing-sm);
    transition: background-color var(--transition-fast);
}

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

.dropdown-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: var(--spacing-sm) 0;
}

/* Sidebar */
.sidebar {
    background-color: var(--bg-light);
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-md);
    padding-top: 80px; /* Account for header */
    height: 100vh;
    overflow-y: auto;
    position: sticky;
    top: 0;
}

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

.sidebar-header h3 {
    margin-bottom: 0;
}

.close-sidebar {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    display: none;
}

.sidebar-nav {
    margin-bottom: var(--spacing-lg);
}

.sidebar-nav ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.sidebar-nav li a {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    gap: var(--spacing-md);
    transition: all var(--transition-fast);
}

.sidebar-nav li a i {
    width: 24px;
    text-align: center;
}

.sidebar-nav li.active a {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    font-weight: 600;
}

.sidebar-nav li:not(.active) a:hover {
    background-color: var(--bg-gray);
    color: var(--text-primary);
}

.sidebar-section {
    margin-bottom: var(--spacing-lg);
}

.sidebar-section h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

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

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

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

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

.empty-list {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-style: italic;
    padding: var(--spacing-sm);
}

.view-more {
    text-align: center;
    padding: var(--spacing-sm) 0;
}

.view-more a {
    font-size: 0.9rem;
    color: var(--accent-color);
}

.sidebar-footer {
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

/* Right Sidebar */
.right-sidebar {
    background-color: var(--bg-light);
    border-left: 1px solid var(--border-color);
    padding: var(--spacing-md);
    padding-top: 80px; /* Account for header */
    height: 100vh;
    overflow-y: auto;
    position: sticky;
    top: 0;
}

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

.chat-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    gap: var(--spacing-sm);
}

.chat-item:hover {
    background-color: var(--bg-gray);
}

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

.chat-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.last-message {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.friend-suggestions {
    margin-top: var(--spacing-sm);
}

.loading {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: var(--spacing-md) 0;
}

/* Notifications Panel */
.notifications-panel {
    position: fixed;
    top: 60px;
    right: 20px;
    width: 350px;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    overflow: hidden;
    display: none;
}

.notifications-panel.active {
    display: block;
}

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

.panel-header h3 {
    margin-bottom: 0;
}

.close-panel {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.panel-body {
    max-height: 400px;
    overflow-y: auto;
}

.notification-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: center;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
    padding: var(--spacing-md);
}

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

.notification-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.notification-content {
    flex: 1;
}

.notification-content p {
    margin-bottom: var(--spacing-sm);
}

.notification-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

/* Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 99;
    display: none;
}

.overlay.active {
    display: block;
}

/* Modal */
.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    overflow: hidden;
    max-width: 90%;
    width: 500px;
    max-height: 90vh;
    display: none;
}

.modal.active {
    display: block;
}

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

.modal-header h3 {
    margin-bottom: 0;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.modal-body {
    padding: var(--spacing-md);
    overflow-y: auto;
    max-height: calc(90vh - 70px);
}

/* Posts Section */
.posts-section {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

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

.section-header h2 {
    margin-bottom: 0;
}

.posts-container {
    padding: var(--spacing-md);
}

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

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

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

.post-user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 500;
    color: var(--text-primary);
}

.post-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.post-options {
    position: relative;
}

.post-menu-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.25rem;
}

.post-menu {
    position: absolute;
    top: 30px;
    right: 0;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    width: 150px;
    z-index: 10;
    display: none;
}

.post-menu.active {
    display: block;
}

.post-menu a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
}

.post-menu a:hover {
    background-color: var(--bg-gray);
}

.post-menu a.delete-post {
    color: var(--danger-color);
}

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

.post-media {
    margin-top: var(--spacing-md);
}

.post-image {
    width: 100%;
    border-radius: var(--radius-md);
}

.post-video {
    width: 100%;
    border-radius: var(--radius-md);
}

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

.like-btn, .comment-btn, .share-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.like-btn:hover, .comment-btn:hover, .share-btn:hover {
    background-color: var(--bg-gray);
}

.like-btn.active {
    color: var(--danger-color);
}

.post-comments {
    padding: 0 var(--spacing-md) var(--spacing-md);
    border-top: 1px solid var(--border-color);
    display: none;
}

.post-comments.active {
    display: block;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--border-color);
}

.empty-state.small {
    padding: var(--spacing-md);
}

.empty-state.small i {
    font-size: 2rem;
}

/* Media Queries */
@media (max-width: 1200px) {
    .app-container {
        grid-template-columns: 200px 1fr 250px;
    }
}

@media (max-width: 992px) {
    .app-container {
        grid-template-columns: 200px 1fr;
    }
    
    .right-sidebar {
        display: none;
    }
}

@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: fixed;
        left: -250px;
        width: 250px;
        z-index: 101;
        transition: left var(--transition-normal);
    }
    
    .sidebar.active {
        left: 0;
    }
    
    .toggle-sidebar, .close-sidebar {
        display: block;
    }
    
    .main-content {
        padding-top: 80px;
    }
    
    .app-title {
        font-size: 1rem;
    }
    
    .search-container {
        margin: 0 var(--spacing-sm);
    }
}

@media (max-width: 576px) {
    .form-row {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .modal {
        width: 95%;
    }
    
    .notifications-panel {
        width: 95%;
        right: 2.5%;
    }
}

/* Messages Page Styles */
.messages-page {
    padding: 0;
    height: calc(100vh - 60px);
    margin-top: 60px;
}

.messages-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    height: 100%;
}

.conversations-list {
    background-color: var(--bg-light);
    border-right: 1px solid var(--border-color);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.messages-search {
    margin: var(--spacing-md);
}

.conversations {
    flex: 1;
    overflow-y: auto;
    padding: 0 var(--spacing-md);
}

.conversation-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    margin-bottom: var(--spacing-sm);
}

.conversation-item:hover {
    background-color: var(--bg-gray);
}

.conversation-item.active {
    background-color: rgba(255, 204, 0, 0.1);
    border-left: 3px solid var(--primary-color);
}

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

.conversation-name {
    font-weight: 500;
    color: var(--text-primary);
}

.conversation-preview {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-sm);
}

.conversation-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.unread-badge {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    font-size: 0.75rem;
    font-weight: bold;
    width: 20px;
    height: 20px;
    border-radius: var(--radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-area {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-light);
}

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

.user-details {
    display: flex;
    flex-direction: column;
}

.user-details h3 {
    margin-bottom: 0;
    font-size: 1.1rem;
}

.user-status {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    background-color: var(--bg-gray);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.message {
    max-width: 70%;
    display: flex;
    flex-direction: column;
}

.message.sent {
    align-self: flex-end;
}

.message.received {
    align-self: flex-start;
}

.message-sender {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.message-sender img {
    width: 20px;
    height: 20px;
    border-radius: var(--radius-circle);
}

.message-sender span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.message-text {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    position: relative;
    word-break: break-word;
}

.message.sent .message-text {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    border-bottom-right-radius: 0;
}

.message.received .message-text {
    background-color: var(--bg-light);
    color: var(--text-primary);
    border-bottom-left-radius: 0;
}

.message-image img {
    max-width: 300px;
    border-radius: var(--radius-md);
}

.message-video video {
    max-width: 300px;
    border-radius: var(--radius-md);
}

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

.play-voice-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    background-color: var(--bg-light);
    border: none;
    cursor: pointer;
}

.message.sent .play-voice-message {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

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

.file-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    background-color: var(--bg-light);
    color: var(--text-primary);
}

.message.sent .file-message {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
    align-self: flex-end;
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.message.sent .message-time {
    color: var(--secondary-color);
}

.text-primary {
    color: var(--primary-color) !important;
}

.chat-input {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-top: 1px solid var(--border-color);
}

.input-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    background-color: var(--bg-gray);
    border-radius: 20px;
    padding: 0 var(--spacing-sm);
}

.emoji-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.25rem;
}

#messageInput {
    flex: 1;
    border: none;
    background: none;
    resize: none;
    padding: var(--spacing-sm);
    height: 40px;
    max-height: 100px;
    outline: none;
}

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

.d-none {
    display: none !important;
}

.send-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-circle);
    background-color: var(--primary-color);
    color: var(--secondary-color);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.recording-indicator {
    display: none;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-top: 1px solid var(--border-color);
}

.recording-wave {
    display: flex;
    align-items: flex-end;
    height: 20px;
    gap: 2px;
}

.recording-wave span {
    display: block;
    width: 3px;
    background-color: var(--danger-color);
    animation: wave 1.2s infinite ease-in-out;
}

.recording-wave span:nth-child(1) { height: 8px; animation-delay: 0s; }
.recording-wave span:nth-child(2) { height: 16px; animation-delay: 0.2s; }
.recording-wave span:nth-child(3) { height: 10px; animation-delay: 0.4s; }
.recording-wave span:nth-child(4) { height: 14px; animation-delay: 0.6s; }

@keyframes wave {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(2); }
}

.recording-time {
    color: var(--danger-color);
    font-weight: bold;
}

.recording-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-left: auto;
}

.empty-chat {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Group Page Styles */
.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.group-card {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.group-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.group-cover {
    height: 100px;
    overflow: hidden;
}

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

.group-info {
    padding: var(--spacing-md);
}

.group-info h3 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
}

.group-info p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.admin-badge {
    display: inline-block;
    padding: 2px var(--spacing-sm);
    background-color: var(--primary-color);
    color: var(--secondary-color);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: bold;
}

.group-actions {
    display: flex;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-md) var(--spacing-md);
}

.group-actions .btn {
    flex: 1;
}

/* Profile Page Styles */
.profile-container {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.profile-header {
    position: relative;
}

.profile-cover {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    position: relative;
}

.profile-avatar {
    position: absolute;
    bottom: -50px;
    left: var(--spacing-lg);
    width: 100px;
    height: 100px;
    border-radius: var(--radius-circle);
    overflow: hidden;
    border: 4px solid var(--bg-light);
    box-shadow: var(--shadow-md);
}

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

.profile-info {
    padding: var(--spacing-lg);
    padding-top: 60px;
}

.profile-info h1 {
    margin-bottom: var(--spacing-xs);
}

.username {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    display: block;
}

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

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

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

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

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

.profile-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-md);
}

.profile-tabs .tab-btn {
    padding: var(--spacing-md) var(--spacing-lg);
}

.create-post {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

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

.input-area {
    flex: 1;
}

.input-area textarea {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    resize: none;
    height: 100px;
}

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

.post-action-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
}

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

.friends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.friend-card {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.friend-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.friend-avatar {
    height: 100px;
    overflow: hidden;
    display: block;
}

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

.friend-info {
    padding: var(--spacing-md);
}

.friend-name {
    font-weight: 500;
    color: var(--text-primary);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.about-section {
    padding: var(--spacing-md);
}

.info-card {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.info-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
    border-bottom: none;
}

.info-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 150px;
    color: var(--text-secondary);
}

.info-value {
    flex: 1;
    font-weight: 500;
}

/* Settings Page Styles */
.settings-container {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--spacing-md);
}

.settings-sidebar {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.settings-nav {
    display: flex;
    flex-direction: column;
}

.settings-nav li {
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-primary);
}

.settings-nav li.active {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    font-weight: 500;
}

.settings-nav li:not(.active):hover {
    background-color: var(--bg-gray);
}

.settings-nav li i {
    width: 20px;
    text-align: center;
}

.settings-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    color: var(--text-primary);
}

.settings-content {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md);
}

.settings-tab {
    display: none;
}

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

.settings-tab h3 {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.profile-upload {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.profile-photo-container {
    position: relative;
    width: 100px;
    height: 100px;
    border-radius: var(--radius-circle);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

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

.upload-btn {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 30px;
    height: 30px;
    border-radius: var(--radius-circle);
    background-color: var(--primary-color);
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.upload-btn input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.theme-selector {
    display: flex;
    gap: var(--spacing-lg);
}

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

.theme-option input {
    display: none;
}

.theme-preview {
    width: 120px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}

.theme-option input:checked + .theme-preview {
    border-color: var(--primary-color);
}

.light-preview {
    background-color: var(--bg-light);
}

.light-preview .preview-header {
    height: 20px;
    background-color: var(--primary-color);
}

.light-preview .preview-content {
    height: 60px;
    padding: 5px;
}

.dark-preview {
    background-color: #1a1a1a;
}

.dark-preview .preview-header {
    height: 20px;
    background-color: #333333;
}

.dark-preview .preview-content {
    height: 60px;
    padding: 5px;
}

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

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

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    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(--border-color);
    transition: var(--transition-fast);
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: var(--bg-light);
    transition: var(--transition-fast);
}

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

.switch input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

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

.radio-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.contact-info {
    margin-bottom: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.contact-item i {
    width: 20px;
    text-align: center;
    color: var(--primary-color);
}

/* Toast Notification */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background-color: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md);
    width: 300px;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    animation: slideIn var(--transition-fast);
}

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

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

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

.toast-icon {
    color: var(--primary-color);
    font-size: 1.5rem;
}

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

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

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

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.toast-message {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
}

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

/* Call Modals */
.call-modal {
    width: 350px;
}

.call-header {
    background-color: var(--secondary-color);
    color: var(--text-light);
}

.call-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg);
}

.caller-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.caller-info h3 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.call-status {
    color: var(--text-secondary);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 0.6; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

.call-actions {
    display: flex;
    gap: var(--spacing-md);
}

.btn-circle.btn-danger {
    background-color: var(--danger-color);
    color: var(--text-light);
}

.btn-circle.btn-success {
    background-color: var(--success-color);
    color: var(--text-light);
}

.btn-circle.btn-secondary {
    background-color: var(--secondary-light);
    color: var(--text-light);
}

.video-call-modal {
    width: 600px;
}

.video-container {
    width: 100%;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.main-video {
    width: 100%;
    height: 300px;
    background-color: var(--secondary-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
}

.main-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.self-video {
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 120px;
    height: 80px;
    background-color: var(--secondary-light);
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.self-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.caller-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: var(--text-light);
}

/* Audio Player */
.audio-player {
    width: 100%;
}

.audio-player audio {
    width: 100%;
    margin-bottom: var(--spacing-md);
}

.audio-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.audio-info p {
    margin-bottom: 0;
    font-size: 0.9rem;
}

/* File Viewer */
.file-viewer {
    width: 100%;
}

.file-content {
    width: 100%;
    height: 200px;
    background-color: var(--bg-gray);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.file-content img {
    max-width: 100%;
    max-height: 100%;
}

.file-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.file-info p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

/* User Search & Group Creation */
.user-list {
    max-height: 300px;
    overflow-y: auto;
}

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

.user-item:hover {
    background-color: var(--bg-gray);
}

.user-info h4 {
    margin-bottom: 0;
}

.user-info .username {
    margin-bottom: 0;
    font-size: 0.8rem;
}

.group-list {
    max-height: 300px;
    overflow-y: auto;
}

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

.group-item:hover {
    background-color: var(--bg-gray);
}

.group-info h4 {
    margin-bottom: 0;
}

.group-info .member-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.group-photo-upload {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.group-photo-container {
    position: relative;
    width: 100px;
    height: 100px;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

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

.selected-members {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.selected-member {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-gray);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
}

.remove-member {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
}

.member-list {
    max-height: 200px;
    overflow-y: auto;
}

.member-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
}

.member-info {
    flex: 1;
    margin-left: var(--spacing-sm);
}

.add-member {
    color: var(--success-color);
}

/* Registration form specific styles */
.register-card {
    max-width: 600px;
}

.captcha-group {
    display: flex;
    flex-direction: column;
}

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

.captcha-code {
    padding: var(--spacing-md);
    background-color: var(--bg-gray);
    border-radius: var(--radius-md);
    font-family: monospace;
    font-size: 1.5rem;
    text-align: center;
    letter-spacing: 5px;
    position: relative;
}

.captcha-code::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--text-secondary);
    opacity: 0.3;
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}





/* Base styles */
:root {
    --primary-color: #FFCC00;
    --secondary-color: #000000;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #ffffff;
    --bg-light: #ffffff;
    --bg-gray: #f5f5f5;
    --border-color: #e0e0e0;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
  }
  
  /* Messages page specific styles */
  .messages-page {
    display: flex;
    height: calc(100vh - 60px);
    overflow: hidden;
  }
  
  .messages-container {
    display: flex;
    width: 100%;
    height: 100%;
    background-color: var(--bg-light);
  }
  
  /* Conversations list */
  .conversations-list {
    width: 320px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
  }
  
  .conversations-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .conversations {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
  }
  
  .conversation-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    text-decoration: none;
    color: var(--text-primary);
  }
  
  .conversation-item:hover,
  .conversation-item.active {
    background-color: var(--bg-gray);
  }
  
  .conversation-info {
    flex: 1;
    margin-left: var(--spacing-md);
    overflow: hidden;
  }
  
  .conversation-name {
    font-weight: 600;
    margin-bottom: 2px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .last-message {
    font-size: 0.9rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  
  /* Chat area */
  .chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-gray);
  }
  
  .chat-header {
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .chat-user {
    display: flex;
    align-items: center;
  }
  
  .user-info {
    margin-left: var(--spacing-md);
  }
  
  .user-info h3 {
    margin: 0;
    font-size: 1.1rem;
  }
  
  .status {
    font-size: 0.9rem;
    color: var(--text-secondary);
  }
  
  .chat-actions {
    display: flex;
    gap: var(--spacing-sm);
  }
  
  .chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
  }
  
  .message-bubble {
    max-width: 70%;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    position: relative;
  }
  
  .message-bubble.sent {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    margin-left: auto;
    border-bottom-right-radius: var(--radius-sm);
  }
  
  .message-bubble.received {
    background-color: var(--bg-light);
    margin-right: auto;
    border-bottom-left-radius: var(--radius-sm);
  }
  
  .message-sender {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
  }
  
  .message-sender img {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-right: var(--spacing-xs);
  }
  
  .message-image {
    max-width: 300px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
  }
  
  .message-video {
    max-width: 300px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
  }
  
  .voice-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-md);
  }
  
  .voice-message audio {
    height: 36px;
  }
  
  .file-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-md);
  }
  
  .file-message i {
    font-size: 1.5rem;
  }
  
  .download-btn {
    margin-left: auto;
    color: inherit;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
  }
  
  .download-btn:hover {
    opacity: 1;
  }
  
  .message-status {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
  }
  
  .message-options {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: var(--spacing-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
  }
  
  .message-bubble.sent .message-options {
    left: -40px;
  }
  
  .message-bubble.received .message-options {
    right: -40px;
  }
  
  .message-bubble:hover .message-options {
    opacity: 1;
  }
  
  .message-options button {
    padding: var(--spacing-xs);
    border-radius: 50%;
    background-color: var(--bg-light);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
  }
  
  .message-options button:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
  }
  
  .chat-input {
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-md);
  }
  
  .input-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: var(--bg-gray);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  #messageInput {
    flex: 1;
    border: none;
    background: none;
    padding: var(--spacing-sm) 0;
    resize: none;
    max-height: 100px;
    min-height: 24px;
  }
  
  #messageInput:focus {
    outline: none;
  }
  
  .input-actions {
    display: flex;
    gap: var(--spacing-sm);
  }
  
  .btn-icon {
    padding: var(--spacing-sm);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
  }
  
  .btn-icon:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
  }
  
  /* Mobile responsiveness */
  @media (max-width: 768px) {
    .conversations-list {
      width: 100%;
      display: flex;
    }
    
    .chat-area {
      position: fixed;
      top: 60px;
      left: 0;
      right: 0;
      bottom: 0;
      z-index: 100;
      display: none;
    }
    
    .chat-area.active {
      display: flex;
    }
    
    .chat-header {
      padding-right: 60px;
    }
    
    .chat-header::after {
      content: '\f00d';
      font-family: 'Font Awesome 5 Free';
      font-weight: 900;
      position: absolute;
      top: var(--spacing-md);
      right: var(--spacing-md);
      padding: var(--spacing-sm);
      cursor: pointer;
    }
    
    .message-bubble {
      max-width: 85%;
    }
    
    .message-image,
    .message-video {
      max-width: 250px;
    }
  }

  /* Base styles */
:root {
    --primary-color: #FFCC00;
    --secondary-color: #000000;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #ffffff;
    --bg-light: #ffffff;
    --bg-gray: #f5f5f5;
    --border-color: #e0e0e0;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
  }
  
  /* Messages page specific styles */
  .messages-page {
    display: flex;
    height: calc(100vh - 60px);
    overflow: hidden;
  }
  
  .messages-container {
    display: flex;
    width: 100%;
    height: 100%;
    background-color: var(--bg-light);
  }
  
  /* Conversations list */
  .conversations-list {
    width: 320px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
  }
  
  .conversations-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .conversations {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
  }
  
  .conversation-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    text-decoration: none;
    color: var(--text-primary);
  }
  
  .conversation-item:hover,
  .conversation-item.active {
    background-color: var(--bg-gray);
  }
  
  .conversation-info {
    flex: 1;
    margin-left: var(--spacing-md);
    overflow: hidden;
  }
  
  .conversation-name {
    font-weight: 600;
    margin-bottom: 2px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .last-message {
    font-size: 0.9rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  
  /* Chat area */
  .chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-gray);
  }
  
  .chat-header {
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .chat-user {
    display: flex;
    align-items: center;
  }
  
  .user-info {
    margin-left: var(--spacing-md);
  }
  
  .user-info h3 {
    margin: 0;
    font-size: 1.1rem;
  }
  
  .status {
    font-size: 0.9rem;
    color: var(--text-secondary);
  }
  
  .chat-actions {
    display: flex;
    gap: var(--spacing-sm);
  }
  
  .chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
  }
  
  .message-bubble {
    max-width: 70%;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    position: relative;
  }
  
  .message-bubble.sent {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    margin-left: auto;
    border-bottom-right-radius: var(--radius-sm);
  }
  
  .message-bubble.received {
    background-color: var(--bg-light);
    margin-right: auto;
    border-bottom-left-radius: var(--radius-sm);
  }
  
  .message-sender {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
  }
  
  .message-sender img {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-right: var(--spacing-xs);
  }
  
  .message-image {
    max-width: 300px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
  }
  
  .message-video {
    max-width: 300px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
  }
  
  .voice-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-md);
  }
  
  .voice-message audio {
    height: 36px;
  }
  
  .file-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-md);
  }
  
  .file-message i {
    font-size: 1.5rem;
  }
  
  .download-btn {
    margin-left: auto;
    color: inherit;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
  }
  
  .download-btn:hover {
    opacity: 1;
  }
  
  .message-status {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
  }
  
  .message-options {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: var(--spacing-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
  }
  
  .message-bubble.sent .message-options {
    left: -40px;
  }
  
  .message-bubble.received .message-options {
    right: -40px;
  }
  
  .message-bubble:hover .message-options {
    opacity: 1;
  }
  
  .message-options button {
    padding: var(--spacing-xs);
    border-radius: 50%;
    background-color: var(--bg-light);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
  }
  
  .message-options button:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
  }
  
  .chat-input {
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-md);
  }
  
  .input-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: var(--bg-gray);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  #messageInput {
    flex: 1;
    border: none;
    background: none;
    padding: var(--spacing-sm) 0;
    resize: none;
    max-height: 100px;
    min-height: 24px;
  }
  
  #messageInput:focus {
    outline: none;
  }
  
  .input-actions {
    display: flex;
    gap: var(--spacing-sm);
  }
  
  .btn-icon {
    padding: var(--spacing-sm);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
  }
  
  .btn-icon:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
  }
  
  /* File preview */
  .file-preview {
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--bg-gray);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
  }
  
  .file-preview img {
    max-width: 100px;
    max-height: 100px;
    border-radius: var(--radius-sm);
  }
  
  .file-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
  }
  
  /* Voice recorder */
  .voice-recorder {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    background-color: var(--bg-gray);
    border-radius: var(--radius-md);
  }
  
  .voice-recorder .timer {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
  }
  
  .voice-recorder button {
    padding: var(--spacing-sm);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
  }
  
  .voice-recorder .cancel-btn {
    background-color: var(--bg-light);
    color: var(--text-secondary);
  }
  
  .voice-recorder .send-btn {
    background-color: var(--primary-color);
    color: var(--secondary-color);
  }
  
  /* Emoji picker */
  .emoji-picker {
    position: absolute;
    bottom: 100%;
    left: 0;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm);
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: var(--spacing-xs);
    z-index: 100;
  }
  
  .emoji-picker button {
    padding: var(--spacing-xs);
    font-size: 1.2rem;
    background: none;
    border: none;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
  }
  
  .emoji-picker button:hover {
    background-color: var(--bg-gray);
  }
  
  /* Mobile responsiveness */
  @media (max-width: 768px) {
    .conversations-list {
      width: 100%;
      display: flex;
    }
    
    .chat-area {
      position: fixed;
      top: 60px;
      left: 0;
      right: 0;
      bottom: 0;
      z-index: 100;
      display: none;
    }
    
    .chat-area.active {
      display: flex;
    }
    
    .chat-header {
      padding-right: 60px;
    }
    
    .chat-header::after {
      content: '\f00d';
      font-family: 'Font Awesome 5 Free';
      font-weight: 900;
      position: absolute;
      top: var(--spacing-md);
      right: var(--spacing-md);
      padding: var(--spacing-sm);
      cursor: pointer;
    }
    
    .message-bubble {
      max-width: 85%;
    }
    
    .message-image,
    .message-video {
      max-width: 250px;
    }
  }