#header.fixed{position:fixed;top:0;left:0;background-color:white;box-shadow:0 2px 5px rgba(0,0,0,.1)}#involucro,#involucro2{height:450px;overflow-y:auto;scroll-behavior:smooth;scrollbar-width:none}#involucro::-webkit-scrollbar,#involucro2::-webkit-scrollbar{display:none}@media (max-width:767px){#involucro,#involucro2{height:600px}}