*{
    box-sizing: border-box;

html, body{
    margin:0;
    height : 100%;
    background: linear-gradient(to bottom, #4facfe, #090250) no-repeat fixed;
}

body{
    font-family: Helvetica, Arial , sans-serif;
    color: #222;
}

nav{
    width:100%;
    text-align: right;
    color: white;
    padding: 10px;
    height: 60px;
    background-color: black;
    margin-bottom: 20px;
    border-radius: 8px;
    padding-right: 40px;
}

nav li {
    display: inline-block;
    height: 100%;
    margin-left: 21px;

}

nav li a:hover{
    text-decoration: underline;
}

nav li a {
    color: white;
    font-size: 16px;
    text-decoration: none;
}

section{
    border: 1px solid #222;
    border-radius: 20px;
    padding: 30px;
    max-width:1200px;
    margin: auto;
    background-color: #9af;
}
.col{
    display: inline-block;
    width: calc(33.33% - 22px);
    vertical-align: top;
    min-height: 200px;
}

footer{
    text-align: center;
    color: white;
    background-color: black;
    border-radius: 8px;
    padding: 15px;
    position: fixed;
    bottom:0;
    left: 10px;
    right: 10px;
}

h1{
    padding: 0 10px;
}

.text-box{
    float: left;
    background-color : white;
    border-radius: 8px;
    padding : 10px;
    color:black;
    width : 50%;
    padding-left : 20px;
    font-size: 25px;
}


.profile-picture {
    float: right;
    width: 350px;
    height: 350px;
    border-radius: 50%;
    object-fit: cover;
    max-width: 50%;
}

.profile-picture:hover{
    filter : blur(5px);
}
.portfolio-button{
    background-color : rgb(8, 8, 232);
    border-radius : 15px;
    color: white;
    margin: 25px;
}

.top-banner {
    width: 100%;
    height: 250px;
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('../img/banner.jpg');
    background-size: cover;
    background-position: center;
    text-align: center;
    margin: 0;
}

.banner-overlay {
    text-align: center;
    color: white;
    padding: 20px;
    border-radius: 10px;
}