body{
    background-image: url("background_8.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    font-family: 'Quicksand', 'sans-serif';
    letter-spacing: 1px;
    color: whitesmoke;
    margin: 0;
}

/* Headers */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Silkscreen', 'Varela Round', 'sans-serif';
    margin: 1%;
}

h1 {
    font-size: 4rem;
    text-align: center;
}

h2 {
    font-size: 3rem;
    text-align: left;
}

h2 a:link {
    color: whitesmoke;
    text-decoration: none;
}

h2 a:hover {
    color: rgb(50, 85,147);
    text-decoration: none;
}

h3 {
    font-size: 2.5rem;
}

h4 {
    font-size: 2rem;
}

h5 {
    font-size: 1.5rem;
}

p, ul, ol {
    font-size: 1.3rem;
}

/* Navigaton Bar */
.navbar {
    position: sticky;
    font-family: 'Silkscreen', 'Varela Round', 'sans-serif';
    overflow: hidden;
    top: 0;
    width: 100%;
    z-index: 100;
}

.navbar a {
    float: right;
    font-size: 1.5rem;
    color: whitesmoke;
    text-decoration: none;
    margin: 1%;   
    padding: 0 2% 0 2%;

}

.navbar a:hover {
    color: rgb(170, 222, 247);
}

.navbar a:active {
    color: rgb(161, 231, 240);
}

/* Content */
.content-background {
    background-color: rgba(255, 255, 255, 0.136);
    padding: 5% 15% 5% 15%;
}

.section-header {
    margin: 0 5% 0 5%;
}

.page-title {
    margin: 10%;
}

#profile-pic {
    text-align: center;
}

.description {
    padding: 2% 10% 2% 10%;
}

.description a:link {
    color: whitesmoke;
    text-decoration: none;
}

.description a:hover {
    color: rgb(50, 85,147);
    text-decoration: none;
}

#github-content {
    padding: 2%;
    margin: 5%;
}

#table-of-contents  h2{
    text-align: center;
    margin: 0;
}

#table-of-contents ol {
    padding: 0 10% 0 10%;
}

/* Certifications */
.column {
    float: left;
    width: 30.33%;
    margin: 1%;
  }
  
.row {margin: 0 ;}
  
  .row:after {
    content: "";
    display: table;
    clear: both;
  }
  
  @media screen and (max-width: 600px) {
    .column {
      width: 100%;
      display: block;
    }
  }
  
.card {
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
    padding: 15px;
    text-align: center;
    background-color: rgba(255, 255, 255, 0.136);
}

#certifications {
    margin: 0 5% 0 5%;
    font-size: 1.3rem;
}

#certifications a:link {
    color: whitesmoke;
    text-decoration: none;
}

#certifications a:hover {
    color: rgb(50, 85,147);
    text-decoration: none;
}

@media screen and (max-width: 600px) {
    .row {
        display: flex;
        padding: 2%;
    }
}

/* Research Papers */
.research-papers-content {
    margin: 0 2.5% 0 2.5%;
    padding: 0 2.5% 0 2.5%;
}

.research-papers-content a:link {
    font-family: 'Quicksand', 'sans-serif';
    font-size: 1.3rem;
    color: whitesmoke;
    text-decoration: none;
}

.research-papers-content a:hover {
    color: rgb(50, 85,147);
    text-decoration: none;
}

.column-one {
    float: left;
    width: 48%;
    margin-right: 2%;
}


.column-two {
    float: left;
    width: 48%;
    margin-left: 2%;
}

/* Footer */
footer {
    font-family: 'Silkscreen', 'Varela Round', 'sans-serif';
    position: absolute;
    width: 100%;
    text-align: center;
    align-items: center;
    margin: 0;
}

footer p {
    font-size: 1rem;
}

footer a:link {
    color: whitesmoke;
    text-decoration: none;
}

footer a:hover {
    color: rgb(125, 209, 215);
    text-decoration: underline;
}

footer img {
    width: 45px;
}