body {
    background: -webkit-linear-gradient(left, #3931af, #00c6ff);
    overflow-x: hidden;
    font-family: 'Montserrat';
    color: #f8f9fa;
}

#header {
    position: absolute;
    width: 100%;
    top: 0;
    left: 0;
    background: -webkit-linear-gradient(bottom,#0584b5,#330456);
    display: inline-block;
    vertical-align: middle;
    padding: 3px;
    text-align: center;
    font-size: 150%;
    font-weight: 600;
}


#content {
    margin-left: auto;
    margin-right: auto;
    position: relative;
    width: 90%;
    margin-top: 150px;
    display: block;
    padding: 10px;
    border-radius: 1.5em;
    background-color: rgba(0, 0, 0, 0.26);
    overflow: auto;
}

#pre-footer, #content{
    font-size: 120%;
}

#content-title{
    text-align: center
}

.underline
{
    border-bottom: 4px solid #f8f9fa;
    padding-bottom: 6px;
    margin-bottom: 12px;
}

a {
    display: inline-block;
    border-radius: 0.3rem;
    text-align: center;
    vertical-align: middle;
    background-color: transparent;
    border: 1px solid #f8f9fa;
    text-decoration: none;
    color: white;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    padding: 3px;
    margin-bottom: 5px;
}

.column_left a, .column_right a{
    width: 300px;
    height: auto;
}

a:active, a:hover{
    background-color: #f8f9fa;
    color:#212529;
}

ul {
  list-style-type: none;
  margin: 2px;
  padding: 0;
}

#content-title{
    margin-bottom: 10px;
    margin-top: 10px;
}

.column_left{
    float: left;
    margin-right: 15px;
    width: 48%;
    text-align: center;
}

.column_right{
    float: left;
    width: 48%;
    text-align: center;
}

#pre-footer{
    margin-left: auto;
    margin-right: auto;
    position: relative;
    width: 90%;
    margin-top: 50px;
    display: block;
    padding: 10px;
    border-radius: 1.5em;
    background-color: rgba(240, 240, 240, 0.50);
    overflow: auto;
}

#pre-footer a{
    border-color: #212529 !important;
    color: #212529 !important ;
}

#pre-footer a:hover{
    background-color: #212529 !important;
    color:#f8f9fa !important;
}