.opera { /*background-color: #fff;*/ margin-top:0; margin-left:2%; z-index: 9999999999; border:1px solid black; font-weight:bold;  color: black;; border-radius:10px; float: left; border: none; outline: none; cursor: pointer;  width: auto; padding-left:1%; /*margin-left:1.5%;*/ font-size:1.3em; text-align:left;margin-top: 1%; margin-bottom: 0; } 
.opera:hover { font-weight:bold;  /*background-color: #777;*/ } /* Style the tab content (and add height:100% for full page content) */ 
.tabcontent { /*color: white;*/ display: none; padding: 0; width:100%; float:left; /* height: 100%;*/ } 
#Venda {/*border:3px solid #C9161B; height:71%; width:100%;*/} 
#Alugar {/*border:3px solid #C9161B; height:71%; width:100%;*/} 
#Lancamentos {/* border:3px solid #777; */} 
@media screen and (max-width:425px){ .opera { padding: 5px 7px; margin-left: 0; padding-left: 0px; float: left; text-align: left; width: 35%; margin-left:9px; } 
.tabcontent { margin-top:3%; } }
@media screen and (max-width:390px){.opera {padding: 7px 9px; margin-left: 0; padding-left: 7px; float: left; text-align: left; width: 35%; margin-left: 2%; margin-top: 3%;}}