#userBox {
  position: fixed; 
    bottom: 0;
    left: 0; 
    width: 100%;
    color: white;         
    padding: 10px 10px;      
    z-index: 1000;
  height: 10%;
  margin: 0px;
  background: white;
  border-top: solid black 2px;
}
#messagesBox {
  overflow: auto;
  height: 100vw;
  width: 100%;
  margin: 0;
}

#userBox input {
  height: 20px;
}
body {
  font-family: Arial, sans-serif
}