@import url(http://fonts.googleapis.com/css?family=Vollkorn|Roboto);
.toggle-button {
    position: absolute;
       top: 15px;
    right: 0px;
    padding: 9px 10px;
    margin: 8px 15px 8px 0;
    height: 30px;
    width: 55px;
    cursor: pointer;
    z-index: 100;
}
.navbar-header{
    display: none;

}

.bar {
    background-color: #ffbf00;
    display: block;
    width: 100%;
    height: 3px;
    border: 0;
    border-radius: 15px;
    -webkit-transition: all .35s ease;
    transition: all .35s ease;
}
.bar + .bar {
    margin-top: 6px;
}
.middle {
    top: 11px;
}
.bottom {
    top: 22px;
}
.toggle-button:hover {
    opacity: .7;
}
.toggle-active .bar {
    background-color: #fff;
}
.toggle-active .top {
    -webkit-transform: translateY(6px) translateX(0) rotate(45deg);
}
.toggle-active .middle {
   opacity: 0;
}
.toggle-active .bottom {
    -webkit-transform: translateY(-12px) translateX(0) rotate(-45deg);
}

.overlay {
    position: absolute;
        background-color: #ffbf00;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;;
    z-index: 100;
    visibility: hidden;
    opacity: 0;
    -webkit-transition: opacity .35s, visibility .35s, height .35s;
}
.nav-active {
    opacity: 1;
    visibility: visible;

}
.overlay ul {
    display: block;
    position: relative;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
    color: #000;
    font-size: 40px;
    font-weight: 600;
    text-align: center;
    list-style: none;
    padding: 0;
}
.overlay ul li {
       display: block;
    padding-bottom: 15px;
    text-align: center;
}
.overlay ul li a {
    color: #fff;
    text-decoration: none;
}
@media (max-width: 991px) {
.navbar-header{
    display: block;
}

}
@media (max-width: 480px) {

.toggle-button {
   
}
.overlay ul {
    font-size: 32px;
}
.overlay ul li {

}

}
@media (max-width: 375px) {
.overlay ul {
    font-size: 23px;
}
}
@media (max-width: 320px) {
.overlay ul li {
    padding-left: 12%;
}
}
@media  (max-width: 736px) and (orientation: landscape) {

.overlay ul {
font-size: 26px;
}
}