h1 {
    font-family: 'Poppins', sans-serif;
}
html, body {
    height: 100%;
    margin:0;
}

.topnav {
    background-color: rgba(25,25,25,0.94);
    /*background-color: blueviolet;*/
    /*overflow: hidden;*/
    position: fixed;
    width: 100%;
    height: 50px;
    top: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    /*align-content: space-between;*/
    /*text-align: center;*/
    /*padding: 2px;*/
}

.fast-ref {
    color: #c2c2c2;
    /*background-color: blueviolet;*/
    text-align: center;
    /*padding: 14px 16px;*/
    font-size: 17px;
    /*padding-top: 15px;*/

    /*position: relative;*/
    /*margin-top: auto;*/
    /*margin-bottom: auto;*/
    align-content: center;

    /*margin: auto;*/
    display: inline-block;
}


.fast-ref:hover {
    color: #ffffff;
    transition: all 0.3s;
}




.topnav .topnav_hid_elem {
    text-decoration: none;
    font-size: 0.85em;
    font-family: "SF Pro Text","Myriad Set Pro","SF Pro Icons","Helvetica Neue","Helvetica","Arial",sans-serif;
    /*display: inline-block;*/
    /*margin: auto;*/
}

@media not (max-width: 47em) {
    .topnav .topnav-menu-btn-label {
        visibility: hidden;
    }
    .topnav .topnav_hid_elem {
        visibility: visible;
    }
}

@media (max-width: 47em) {
    .topnav .topnav-menu-btn-label {
        visibility: visible;
    }
    .topnav .topnav_hid_elem {
        position: absolute;
        visibility: hidden;
    }
}

.topnav input[type=checkbox] {
    opacity: 0;
}

.topnav-menu-btn-label {
    display: flex;
    align-items: center;
    position: fixed;
    top: 10px;
    right: 20px;  width: 26px;
    height: 26px;  cursor: pointer;
    z-index: 1;
    visibility: hidden;
}


.topnav-menu-btn-label > span,
.topnav-menu-btn-label > span::before,
.topnav-menu-btn-label > span::after {

    position: absolute;
    width: 100%;
    height: 2px;
    /*right: 3px;*/
    background-color: #ddd;
}
.topnav-menu-btn-label > span::before {
    content: '';
    top: -8px;
}
.topnav-menu-btn-label > span::after {
    content: '';
    top: 8px;
}

.topnav-menu-btn-label > span,
.topnav-menu-btn-label > span::before,
.topnav-menu-btn-label > span::after {
    transition-duration: .25s;
}

.topnav-menu-btn-checkbox:checked ~ .topnav-menu-btn-label > span::before {
    top: 0;
    transform: rotate(-90deg);
}

.topnav-menu-btn-checkbox:checked ~ .topnav-menu-btn-label > span {
    transform: rotate(45deg);
}

.topnav-menu-btn-checkbox:checked ~ .topnav-menu-btn-label > span::after {
    top: 0;
    transform: rotate(90deg);

}




.topnav-menu-btn-checkbox:checked ~ .topnav-menu {
    top: -5%;
    visibility: visible;
}

.topnav-menu-btn-checkbox:checked ~ .topnav-menu-btn-label > span {
    background-color: #000000;
}

.topnav-menu-btn-checkbox:checked ~ .topnav-menu-btn-label > span::before {
    background-color: #000000;
}

.topnav-menu-btn-checkbox:checked ~ .topnav-menu-btn-label > span::after {
    background-color: #000000;
}

.topnav-menu {
    /*left: 0;*/
    visibility: hidden;
    display: flex;
    flex-direction: column;
    position: fixed;
    /*left: -100%;*/
    top: -100%;
    left: 0;
    width: 100%;
    height: auto;
    margin: 0;
    padding: 80px 0;
    list-style: none;
    background-color: #ECEFF1;
    /*box-shadow: 1px 0px 6px rgba(0, 0, 0, .2);*/
    transition-duration: .25s;
}

.topnav-menu-item {
    display: flex;
    flex-direction: column;

    font-family: 'Roboto', sans-serif;
    font-size: 20px;
    font-weight: 600;

    text-decoration: none;
    position: relative;

    text-align: center;
    padding: 12px 24px;
}

.topnav-menu-item:hover {
    background-color: #ddd;
    color: black;
}


/*.topnav-menu {*/
/*    position: fixed;*/
/*    top: 23px;*/
/*    right: 20px;  width: 26px;*/
/*    height: 26px;  cursor: pointer;*/
/*    z-index: 1;*/
/*}*/

.topnav-right {
    /*position: fixed;*/
    float: right;
    position: absolute;
    right: 2em;
    /*position: relative;*/
}



/*a:visited {*/
/*    color: green;*/
/*}*/