:root {
            --bg-primary: #0f172a;
            --bg-secondary: #1e293b;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --accent-primary: #a855f7;
            --accent-secondary: #ec4899;
            --border-color: rgba(255, 255, 255, 0.1);
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-blur: blur(10px);
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }

        .light-mode {
            --bg-primary: #f8fafc;
            --bg-secondary: #e2e8f0;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --border-color: rgba(0, 0, 0, 0.1);
            --glass-bg: rgba(255, 255, 255, 0.8);
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }

        body {
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-family: 'Inter', sans-serif;
            transition: all 0.3s ease;
            margin: 0;
            overflow-x: hidden;
        }

        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
        }

        .glass-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }

        .btn-primary {
            background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
            color: white;
            padding: 0.75rem 1.5rem;
            border-radius: 9999px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            transform: scale(1.05);
            box-shadow: 0 0 20px rgba(168, 85, 247, 0.3);
        }

        .btn-secondary {
            background: var(--bg-secondary);
            color: var(--text-primary);
            padding: 0.75rem 1.5rem;
            border-radius: 9999px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

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

        .form-input {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 0.75rem 1rem;
            border-radius: 0.5rem;
            width: 100%;
            transition: all 0.3s ease;
            box-sizing: border-box;
        }

        .form-input:focus {
            outline: none;
            border-color: var(--accent-primary);
            box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.1);
        }

        .nav-link {
            color: var(--text-secondary);
            font-weight: 500;
            position: relative;
            padding-bottom: 0.25rem;
            transition: all 0.3s ease;
        }

        .nav-link:hover, .nav-link.active {
            color: var(--accent-primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
        }

        .post-image {
            border-radius: 1rem;
            object-fit: cover;
            max-height: 400px;
            width: 100%;
        }

        .notification-badge {
            background: var(--accent-secondary);
            color: white;
            font-size: 0.75rem;
            padding: 0.25rem 0.5rem;
            border-radius: 9999px;
            position: absolute;
            top: -0.5rem;
            right: -0.5rem;
        }

        .trending-tag {
            background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
            color: white;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.875rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .trending-tag:hover {
            transform: scale(1.05);
        }

        .modal {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(5px);
            align-items: center;
            justify-content: center;
            z-index: 100;
        }

        .modal-content {
            background: var(--bg-primary);
            border-radius: 1rem;
            padding: 2rem;
            width: 90%;
            max-width: 28rem;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            animation: modalFadeIn 0.3s ease;
            box-sizing: border-box;
        }

        @keyframes modalFadeIn {
            from { opacity: 0; transform: scale(0.95); }
            to { opacity: 1; transform: scale(1); }
        }

        .fade-in {
            animation: fadeIn 0.5s ease;
        }

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

        .disabled-btn {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .tooltip {
            position: relative;
        }

        .tooltip::after {
            content: attr(data-tooltip);
            position: absolute;
            bottom: 100%;
            left: 50%;
            transform: translateX(-50%);
            background: var(--bg-secondary);
            color: var(--text-primary);
            padding: 0.5rem 1rem;
            border-radius: 0.5rem;
            white-space: nowrap;
            opacity: 0;
            transition: opacity 0.3s ease;
            pointer-events: none;
        }

        .tooltip:hover::after {
            opacity: 1;
        }

        .comment-section {
            display: none;
        }

        .comment-section.expanded {
            display: block;
        }

        .message-bubble {
            padding: 0.75rem 1rem;
            border-radius: 1rem;
            max-width: 70%;
        }

        .message-bubble.sent {
            background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
            color: white;
            margin-left: auto;
        }

        .message-bubble.received {
            background: var(--bg-secondary);
            color: var(--text-primary);
            margin-right: auto;
        }

        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }

        .loading-spinner {
            border: 4px solid var(--border-color);
            border-top: 4px solid var(--accent-primary);
            border-radius: 50%;
            width: 2rem;
            height: 2rem;
            animation: spin 1s linear infinite;
        }

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

        .footer {
            background: var(--bg-secondary);
            color: var(--text-secondary);
        }

        .user-avatar {
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 9999px;
            object-fit: cover;
            border: 2px solid var(--accent-primary);
        }

        /* Navbar Styles */
        nav {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            box-shadow: var(--shadow);
            padding: 1rem;
            margin: 1rem;
            position: sticky;
            top: 1rem;
            z-index: 50;
        }

        nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.5rem;
            font-weight: 700;
            background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .nav-brand i {
            color: var(--text-primary);
        }

        /* Mobile Menu Styles */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 100%;
            width: 80%;
            max-width: 300px;
            height: 100%;
            background: var(--bg-primary);
            z-index: 100;
            flex-direction: column;
            align-items: center;
            padding: 2rem;
            box-sizing: border-box;
            transition: transform 0.3s ease-in-out;
            box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
            border-left: 1px solid var(--border-color);
        }

        .mobile-menu.active {
            display: flex;
            transform: translateX(-100%);
        }

        .mobile-menu a, .mobile-menu button {
            color: var(--text-primary);
            font-size: 1.25rem;
            margin: 0.75rem 0;
            width: 100%;
            text-align: left;
            padding: 0.75rem 1rem;
            border-radius: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: background 0.3s ease;
        }

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

        .mobile-menu button.text-red-400:hover {
            background: rgba(239, 68, 68, 0.1);
        }

        .hamburger {
            display: none;
            cursor: pointer;
            padding: 0.5rem;
        }

        .hamburger div {
            width: 30px;
            height: 3px;
            background: var(--text-primary);
            margin: 6px 0;
            transition: all 0.3s ease;
        }

        .hamburger.active div:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger.active div:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active div:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -7px);
        }

        /* Responsive Adjustments */
        @media (max-width: 768px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }

            nav .container {
                flex-wrap: wrap;
            }

            .md\\:flex {
                display: none;
            }

            .hamburger {
                display: block;
            }

            .main-content {
                padding: 1rem;
            }

            .glass-card {
                padding: 1rem;
            }

            .post-image {
                max-height: 300px;
            }

            .modal-content {
                width: 95%;
                padding: 1.5rem;
            }

            .footer .grid {
                grid-template-columns: 1fr;
            }

            .message-bubble {
                max-width: 85%;
            }

            .form-input {
                font-size: 0.9rem;
            }

            .btn-primary, .btn-secondary {
                padding: 0.5rem 1rem;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 480px) {
            .glass-card {
                padding: 0.75rem;
            }

            .user-avatar {
                width: 2rem;
                height: 2rem;
            }

            .post-image {
                max-height: 250px;
            }

            .modal-content {
                padding: 1rem;
            }

            .btn-primary, .btn-secondary {
                padding: 0.5rem 0.75rem;
                font-size: 0.85rem;
            }

            .text-2xl {
                font-size: 1.5rem;
            }

            .text-lg {
                font-size: 1.1rem;
            }

            .nav-brand {
                font-size: 1.25rem;
            }
        }