:root {
            --neon-blue: #00f3ff;
            --neon-pink: #bc13fe;
            --neon-green: #0aff0a;
            --bg-dark: #050510;
        }

        body { 
            margin: 0; 
            overflow: hidden; 
            background-color: var(--bg-dark); 
            font-family: 'Rajdhani', sans-serif; 
            color: white;
            user-select: none;
            -webkit-user-select: none;
            transition: background-color 0.5s ease;
        }

        /* Cyberpunk UI Utilities */
        .font-cyber { font-family: 'Orbitron', sans-serif; }
        
        .cyber-border {
            position: relative;
            background: rgba(10, 10, 30, 0.85);
            border: 1px solid var(--neon-blue);
            box-shadow: 0 0 10px rgba(0, 243, 255, 0.1);
            clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
            transition: border-color 0.5s ease;
        }

        .cyber-btn {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.05));
            border: 1px solid var(--neon-blue);
            color: var(--neon-blue);
            text-transform: uppercase;
            letter-spacing: 2px;
            transition: all 0.2s ease;
            clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
        }

        .cyber-btn:hover:not(:disabled) {
            background: var(--neon-blue);
            color: #000;
            box-shadow: 0 0 20px var(--neon-blue);
        }

        .cyber-btn:disabled {
            border-color: #555;
            color: #555;
            background: rgba(0,0,0,0.5);
            cursor: not-allowed;
        }

        .cyber-btn-primary {
            border-color: var(--neon-green);
            color: var(--neon-green);
        }
        .cyber-btn-primary:hover:not(:disabled) {
            background: var(--neon-green);
            color: #000;
            box-shadow: 0 0 20px var(--neon-green);
        }

        .cyber-btn-danger {
            border-color: var(--neon-pink);
            color: var(--neon-pink);
        }
        .cyber-btn-danger:hover:not(:disabled) {
            background: var(--neon-pink);
            color: #000;
            box-shadow: 0 0 20px var(--neon-pink);
        }

        /* Animations */
        @keyframes pulse-glow {
            0%, 100% { text-shadow: 0 0 10px currentColor; }
            50% { text-shadow: 0 0 20px currentColor, 0 0 40px currentColor; }
        }

        .animate-pulse-glow { animation: pulse-glow 2s infinite; }

        .loader {
            width: 60px; height: 60px;
            border: 4px solid var(--neon-blue);
            border-top-color: transparent;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        @keyframes spin { 100% { transform: rotate(360deg); } }

        #canvas-container { z-index: 0; }
        #ui-layer { z-index: 10; }
        
        /* History Bar Scroll */
        .history-scroll::-webkit-scrollbar { height: 4px; width: 4px; }
        .history-scroll::-webkit-scrollbar-track { background: transparent; }
        .history-scroll::-webkit-scrollbar-thumb { background: #333; border-radius: 2px; }

        /* Floating Animation for HUD */
        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-5px); }
        }
        .floating { animation: float 3s ease-in-out infinite; }

        /* Sidebar Transition */
        #history-sidebar { transition: transform 0.3s ease-in-out; }
        .sidebar-open { transform: translateX(0) !important; }
        .sidebar-closed { transform: translateX(100%); }
        /* Desktop: always show sidebar if large screen */
        @media (min-width: 1024px) {
            .sidebar-closed { transform: translateX(0); }
        }
        
        /* Modern Toast Animation */
        @keyframes slideInRight {
            from { transform: translateX(100%); opacity: 0; }
            to { transform: translateX(0); opacity: 1; }
        }
        .toast-enter { animation: slideInRight 0.3s ease-out forwards; }