body {
    background: #FFF;
    color: #000;
    font-size: 25px;
    font-family: 'Montserrat', sans-serif;
}
header {
    background: #90e2ec94;
    text-align: center;
    padding: 15px;
}
.wrapper{
    display: flex;
}
nav{
    background: #0b3feb3b;
    width: 20%;
    float: left;
}
.menu{
    width: 15%;
    position:fixed;
    padding-left: 10px;
}
}
.menu div{
width: 100% ;
}
button{
    background: #e0f1afcc;
    margin: 15px;
    font-size: 20px;
    font-family: 'Montserrat', sans-serif;
    width: 100%;
    transition-duration: 0.4s;
    cursor: pointer; 
}
button:hover{
    background:#0b3feb65;
    color: #FFF; 
}
button:active{
    background:#043cf5da;
    color: #FFF; 
}
article{
    background: #e0f1afcc;
    width: 80%;
    float: right;
}
footer{
    background:  #90e2ec94;
    text-align: center;
    padding: 15px;
}
section{
    padding: 20px;
}