body {
            font-family: 'Roboto', sans-serif;
            background-color: #111827; /* Dark background */
        }

        .auth-container {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background-color: #111827;
            background-image: url('https://images.unsplash.com/photo-1511671782779-c97d3d27a1d4?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
        }

        .auth-card {
            background-color: #1f2937;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
            padding: 2rem;
            width: 100%;
            max-width: 400px;
            transition: all 0.3s ease;
        }

        .logo-container {
            text-align: center;
            margin-bottom: 1.5rem;
        }

        .auth-logo {
            height: 60px;
            margin-bottom: 1rem;
        }

        .auth-title {
            font-size: 1.5rem;
            font-weight: bold;
            color: #f3f4f6;
            margin-bottom: 0.5rem;
        }

        .auth-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .auth-input {
            padding: 0.75rem;
            border: 1px solid #4b5563;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s;
            color: #f3f4f6;
        }

        .auth-input:focus {
            outline: none;
            border-color: #3b82f6;
        }

        .auth-button {
            background-color: #374151;
            color: white;
            padding: 0.75rem;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: background-color 0.3s;
        }

        .auth-button:hover {
            background-color: #4b5563;
        }

        .auth-switch-text {
            text-align: center;
            color: #9ca3af;
            font-size: 0.875rem;
        }

        .auth-switch-button {
            background: none;
            border: none;
            color: #3b82f6;
            cursor: pointer;
            font-weight: 500;
            padding: 0;
        }

        .auth-switch-button:hover {
            text-decoration: underline;
        }

        .auth-message {
            color: #9ca3af;
            margin-bottom: 1rem;
            text-align: center;
        }

        .wave-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: white;
            margin: 0 2px;
            animation: wave 1.5s infinite ease-in-out;
        }

        .wave-dot:nth-child(2) {
            animation-delay: 0.2s;
        }

        .wave-dot:nth-child(3) {
            animation-delay: 0.4s;
        }

        @keyframes wave {
            0%, 60%, 100% {
                transform: translateY(0);
            }
            30% {
                transform: translateY(-8px);
            }
        }

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

        .animate-fade-out {
            animation: fadeOut 0.5s ease-in-out;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        @keyframes fadeOut {
            from { opacity: 1; }
            to { opacity: 0; }
        }

        .skeleton {
            background: linear-gradient(90deg, #1f2937 25%, #374151 50%, #1f2937 75%);
            background-size: 200% 100%;
            animation: shimmer 1.5s infinite;
        }

        @keyframes shimmer {
            0% {
                background-position: 200% 0;
            }
            100% {
                background-position: -200% 0;
            }
        }

        /* Mobile Sidebar Styles */
        #mobile-sidebar {
            transform: translateX(-100%); /* Hidden by default */
        }
        #mobile-sidebar.open {
            transform: translateX(0); /* Visible when open */
        }
        #sidebar-overlay {
            display: none; /* Hidden by default */
        }
        #sidebar-overlay.open {
            display: block; /* Visible when sidebar is open */
        }

        /* Hide default desktop sidebar and mobile bottom nav (ensure they are not generated in HTML anymore) */
        /* These rules are kept for robustness if any old elements persist */
        .sidebar-container, .mobile-nav {
            display: none !important;
        }

        /* Custom scrollbar for dark theme */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }

        ::-webkit-scrollbar-track {
            background: #1f2937;
        }

        ::-webkit-scrollbar-thumb {
            background: #4b5563;
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #6b7280;
        }

        /* Selection color */
        ::selection {
            background: #3b82f6;
            color: white;
        }

        /* Notification badge */
        .notification-badge {
            position: absolute;
            top: -5px;
            right: -5px;
            background-color: #3b82f6;
            color: white;
            border-radius: 50%;
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: bold;
        }