/* Base cinematic black background with subtle gradient */
        body {
            background-color: #000000;
            color: #FFFFFF;
            font-family: 'Inter', sans-serif;
            overflow-x: hidden;
        }

        /* Subtle Futuristic Grid Background */
        #app-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            opacity: 0.1; /* Very faint */
            background-image:
                linear-gradient(to right, #220000 1px, transparent 1px),
                linear-gradient(to bottom, #220000 1px, transparent 1px);
            background-size: 50px 50px;
            z-index: 0;
        }

        /* Liquid Glass UI Style */
        .liquid-glass {
            backdrop-filter: blur(10px);
            background-color: rgba(255, 255, 255, 0.05); /* Transparent white */
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        .liquid-glass:hover {
            background-color: rgba(255, 255, 255, 0.1);
            box-shadow: 0 0 15px rgba(255, 0, 0, 0.4);
            border-color: rgba(255, 0, 0, 0.5);
            transform: translateY(-2px);
        }

        /* Input Field Styling */
        .tha-input {
            background-color: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 0.75rem 1rem;
            color: white;
            transition: all 0.2s;
        }

        .tha-input:focus {
            outline: none;
            border-color: #FF0000;
            box-shadow: 0 0 0 2px rgba(255, 0, 0, 0.5);
        }

        /* Hide content pages and show only the active one */
        .page-content { display: none; }
        .page-content.active { display: block; }