1.1 sthen 1: body { 2: margin: 40px auto; 1.3 ! sthen 3: max-width: 1100px; 1.1 sthen 4: line-height: 1.6; 5: color: #111; 6: padding: 0 10px; 7: } 8: 9: h1,h2,h3 { 10: line-height: 1.2; 11: }