rem;
            opacity: 0.9;
        }

        .playground {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .panel {
            background: white;
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
        }

        .panel h2 {
            color: #4a5568;
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }

        .fo