body { 
    font-size: 18px; 
    background: #fff; 


}
body::after {
    content: "";
    background-color: #fff;
    opacity: 0.5;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: -1;   
  }
span { 
    color: black; 
} 
::-webkit-input-placeholder { 
    color: #711 
}
#main { 
    height: 100%; 
    width: 100%; 
}

#messages {
    margin-bottom: 35px;
}

#input { 
    display: block;
    position: fixed;
    margin: auto;
    width: 100%;
    bottom: 0;
    padding: 5px;
    border: 1px solid #421; 
}