.card {
            max-width: 800px;
            margin: 2rem auto;
            box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.15);
        }
        textarea {
            min-height: 150px;
            resize: vertical;
        }
        #result {
            font-family: monospace;
            word-break: break-all;
        }