.app{max-width:600px;margin:40px auto;padding:0 16px;display:flex;flex-direction:column;gap:12px}.input{width:100%;padding:8px;font-size:1rem;resize:vertical}.button{align-self:flex-start;padding:8px 20px;font-size:1rem;cursor:pointer}.button:disabled{opacity:.6;cursor:not-allowed}.result{font-size:1.2rem;font-weight:700;margin:0}.error{color:red;margin:0}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:system-ui,sans-serif}