body{
  margin: 0px;
  background-color:blue;  

}


header {
  z-index:2;
  background-color: rgb(102, 0, 51);
  padding:15px;
  height:35px;
  position: fixed;
  top: 0;
  width: 100%;
  
  
}

#menu {
  background-color: #FFF;
  width: 300px;
  padding: 15px;
  position: fixed;
  left: 0;
  top: 65px;
  height: 100%;
  box-sizing: border-box;
  
}



#menu ul{
  
  padding-left:40%;  
  
}

#menu ul li{
  
  list-style-type: upper-roman;
  
  
}

#menu ul li a{
  
  display: block;  
  
}

#menu ul li:hover{
  
  background-color: black;
    
}

#borda{
  position:fixed;
  top:65px;
  height: 15px;
  z-index:3;
  background-color: purple;
  margin-left: 300px;  
  width: 100%;
  border-top-left-radius: 25px;
  padding: 5px;
  

}

#tapa_buraco{
  top:65px;
  position:fixed;
  background-color:#FFF;
  display:block;
  z-index:2;
  margin-left:300px;
  height: 28px;
  width: 30px;
}

#main{
  position:relative;
  z-index:1;
  background-color: transparent;
  margin-top: 65px;
  margin-left: 300px;
  padding: 15px;
  border-top-left-radius: 25px;
  min-height: 75vh;
  
}