:root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --secondary: #7c3aed;
            --accent: #06b6d4;
            --success: #10b981;
            --warning: #f59e0b;
            --error: #ef4444;
            --surface: #0f172a;
            --surface-light: #1e293b;
            --surface-lighter: #334155;
            --text-primary: #f8fafc;
            --text-secondary: #cbd5e1;
            --text-muted: #64748b;
            --shadow: rgba(0, 0, 0, 0.25);
            --radius: 12px;
            --transition: all 0.3s ease;
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: var(--text-primary);
            min-height: 100vh;
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header Styles */
        header {
            background: rgba(15, 23, 42, 0.8);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--surface-lighter);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
        }

        .logo-icon {
            color: var(--accent);
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
            align-items: center;
        }

        .nav-menu a {
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-menu a:hover, .nav-menu a.active {
            color: var(--primary);
        }

        .user-profile {
            position: relative;
        }

        .profile-toggle {
            display: flex;
            align-items: center;
            gap: 10px;
            cursor: pointer;
            padding: 8px 12px;
            border-radius: var(--radius);
            background: var(--surface-light);
            transition: var(--transition);
        }

        .profile-toggle:hover {
            background: var(--surface-lighter);
        }

        .profile-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 600;
            background-size: cover;
            background-position: center;
        }

        .profile-dropdown {
            display: none;
            position: absolute;
            top: 100%;
            right: 0;
            width: 220px;
            background: var(--surface-light);
            border-radius: var(--radius);
            box-shadow: 0 10px 25px var(--shadow);
            overflow: hidden;
            z-index: 10;
            margin-top: 8px;
        }

        .profile-dropdown a {
            display: flex;
            align-items: center;
            padding: 12px 16px;
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition);
            border-bottom: 1px solid var(--surface-lighter);
        }

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

        .profile-dropdown a:hover {
            background: var(--surface-lighter);
            color: var(--text-primary);
        }

        .profile-dropdown i {
            width: 20px;
            margin-right: 10px;
            color: var(--accent);
        }

        /* Main Content */
        .main-content {
            padding: 40px 0;
        }

        .page-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .page-title {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 10px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .page-subtitle {
            color: var(--text-secondary);
            font-size: 18px;
            max-width: 600px;
            margin: 0 auto;
        }

        /* Tabs */
        .tabs {
            display: flex;
            justify-content: center;
            margin-bottom: 30px;
            border-bottom: 1px solid var(--surface-lighter);
        }

        .tab {
            padding: 12px 24px;
            font-weight: 500;
            cursor: pointer;
            color: var(--text-secondary);
            transition: var(--transition);
            border-bottom: 2px solid transparent;
        }

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

        .tab-content {
            display: none;
        }

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

        /* Post Grid */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 25px;
        }

        .post-card {
            background: var(--surface-light);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 5px 15px var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--surface-lighter);
        }

        .post-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px var(--shadow);
        }

        .post-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            padding: 5px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
        }

        .badge-selling {
            background: var(--success);
            color: white;
        }

        .badge-looking {
            background: var(--warning);
            color: white;
        }

        .post-image {
            height: 200px;
            background: var(--surface-lighter);
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .post-content {
            padding: 20px;
        }

        .post-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .post-description {
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 15px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 15px;
            padding-top: 15px;
            border-top: 1px solid var(--surface-lighter);
        }

        .post-price {
            font-weight: 700;
            font-size: 18px;
            color: var(--accent);
        }

        .post-user {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 14px;
        }

        .user-avatar {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 10px;
            font-weight: 600;
            background-size: cover;
            background-position: center;
        }

        .post-actions {
            display: flex;
            gap: 10px;
            margin-top: 15px;
        }

        .btn {
            padding: 8px 16px;
            border-radius: var(--radius);
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
            border: none;
            font-family: 'Inter', sans-serif;
        }

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

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

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

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

        /* FAB */
        .fab {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            box-shadow: 0 5px 15px var(--shadow);
            cursor: pointer;
            transition: var(--transition);
            z-index: 90;
            border: none;
        }

        .fab:hover {
            transform: scale(1.1);
            background: var(--primary-dark);
        }

        /* Modal Styles */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 1000;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .modal-content {
            background: var(--surface-light);
            border-radius: var(--radius);
            width: 100%;
            max-width: 500px;
            box-shadow: 0 20px 40px var(--shadow);
            overflow: hidden;
        }

        .modal-header {
            padding: 20px;
            border-bottom: 1px solid var(--surface-lighter);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .modal-title {
            font-size: 20px;
            font-weight: 600;
        }

        .close-btn {
            background: none;
            border: none;
            color: var(--text-secondary);
            font-size: 20px;
            cursor: pointer;
            transition: var(--transition);
        }

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

        .modal-body {
            padding: 20px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border-radius: var(--radius);
            background: var(--surface);
            border: 1px solid var(--surface-lighter);
            color: var(--text-primary);
            font-family: 'Inter', sans-serif;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
        }

        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }

        .form-actions {
            display: flex;
            gap: 10px;
            justify-content: flex-end;
            margin-top: 20px;
        }

        /* Empty State */
        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-secondary);
        }

        .empty-state i {
            font-size: 64px;
            margin-bottom: 20px;
            color: var(--surface-lighter);
        }

        .empty-state h3 {
            font-size: 22px;
            margin-bottom: 10px;
            color: var(--text-secondary);
        }

        /* Loading State */
        .loading-state {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 40px;
            color: var(--text-secondary);
        }

        .spinner {
            width: 40px;
            height: 40px;
            border: 4px solid var(--surface-lighter);
            border-left: 4px solid var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-right: 15px;
        }

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

        /* Responsive */
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                gap: 15px;
            }
            
            .nav-menu {
                gap: 15px;
            }
            
            .posts-grid {
                grid-template-columns: 1fr;
            }
            
            .page-title {
                font-size: 28px;
            }
        }
        /* Inbox Styles */
.inbox-messages {
    max-height: 400px;
    overflow-y: auto;
    padding: 10px;
}

.message-item {
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
    background: white;
    color: #333; /* Add text color */
}

.message-item.unread {
    border-left: 4px solid #3b82f6;
    background: #f8fafc;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.message-sender {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sender-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-size: cover;
    background-position: center;
    background-color: #ddd; /* Fallback color */
}

.sender-info strong {
    display: block;
    margin-bottom: 4px;
    color: #333; /* Text color */
}

.message-time {
    font-size: 12px;
    color: #6b7280;
}

.unread-indicator {
    color: #3b82f6;
    font-size: 24px;
}

.message-text {
    margin-bottom: 8px;
    line-height: 1.5;
    color: #333; /* Text color */
}

.message-context {
    font-size: 14px;
    color: #6b7280;
    font-style: italic;
    margin-bottom: 12px;
}

.message-actions {
    display: flex;
    gap: 8px;
}

.empty-inbox {
    text-align: center;
    padding: 40px 20px;
    color: #6b7280;
}

.empty-inbox i {
    margin-bottom: 16px;
    color: #d1d5db;
}

.empty-inbox h3 {
    color: #333; /* Text color */
    margin-bottom: 8px;
}

.empty-inbox p {
    color: #6b7280;
}

/* Badge styles */
.message-badge {
    background: #ef4444;
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: -5px;
    right: -5px;
}

.inbox-badge {
    background: #ef4444;
    color: white;
    border-radius: 10px;
    padding: 2px 8px;
    font-size: 12px;
    margin-left: 8px;
}

.profile-toggle {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Button styles for inbox */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary {
    background: #3b82f6;
    color: white;
}

.btn-primary:hover {
    background: #2563eb;
}

.btn-secondary {
    background: #6b7280;
    color: white;
}

.btn-secondary:hover {
    background: #4b5563;
}