.main {
    margin-top: 100px;    
}



.avatar{
    display: block;

    width: 300px;

    margin-bottom: 20px;

    margin-left: auto;

    margin-right: auto;
}



.search-input{
    display: block;

    width: 400px;

    margin-left: auto;

    margin-right: auto;

    line-height: 24px;

    padding-top: 10px;

    padding-bottom: 10px;

    padding-left: 30px;

    padding-right: 30px;

    border: 1px solid #dfe1e5;

    border-radius: 24px;
}



.btn-wrapper {
    display: flex;
    justify-content: center;
}

.btn{
    margin-left: 4px;

    margin-right: 4px;

    margin-top: 30px;

    background: #dfe1e5;

    border: none;

    padding-top: 8px;

    padding-bottom: 8px;

    padding-left: 16px;

    padding-right: 16px;

    border-radius: 4px;

    font-size: 14px;
}


.topnav {
  background-color: #ffffff;
  overflow: hidden;
.topnav a {
  float: center;
  color: black;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}
.topnav a.active {
  background-color: #04AA6D;
  color: white;
}

    
html, body {
    height: 100%;
}

html {
    display: table;
    margin: auto;
}

body {
    display: table-cell;
    vertical-align: middle;
}