body {
    margin: 0;
    font-family: "Trebuchet MS", "Segoe UI", Candara, "Bitstream Vera Sans",
        "DejaVu Sans", "Bitstream Vera Sans", Verdana, "Verdana Ref", sans-serif;
    /* background-color:#fcf5e5; */
}
ul.topnav {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #292f33;
}

ul.topnav li {
    float: left;
}

ul.topnav li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

ul.topnav li a:hover:not(.active) {
    background-color: #111;
}

ul.topnav li a.active {
    background-color: SeaGreen;
    color: black;
}

ul.topnav li.right {
    float: right;
}

@media screen and (max-width: 600px) {
    ul.topnav li.right,
    ul.topnav li {
        float: none;
    }
}

output_text_color {
    text-decoration: none;
    color: blue;
}

table.centering {
    margin-left: auto;
    margin-right: auto;
}

.button_coloured {
    background-color: #4caf50;
    border: none;
    color: black;
    padding: 12px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 14px;
    margin: 4px 2px;
    cursor: pointer;
    font-weight: bold;
}
/* For loading section */
.centered {
    text-align: center;
}

.loader {
    border: 10px solid #f3f3f3;
    border-radius: 50%;
    border-top: 10px solid green;
    border-bottom: 10px solid green;
    width: 60px;
    height: 60px;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
}

@-webkit-keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(360deg);
    }
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}