.toggle-button {
    position: relative;  /* position: fixed;*/
    top: 8px;
    left: 15px;
    padding: 14px 10px 2px 10px;
    margin: 8px 15px 8px 0;
    height: 54px;
    width: 54px;
    cursor: pointer;
   z-index: 6;
    float: left; /* extra */
    background-color: #000000;
}
.toggle-button:after {
    content: "MENU";
    display: block;
    width: 30px;
    height: 15px;
    font-size: 11px;
    color: #fff;
    position: relative;
    top: 10px;
    -webkit-transition: all .35s ease;
    transition: all .35s ease;
}
.toggle-active.toggle-button:after {
    top: 16px;
}
.bar {
    background-color: #d29b00; /* żółty */ 
    display: block;
    width: 100%;
    height: 3px;
    border: 0;
    -webkit-transition: all .35s ease;
    transition: all .35s ease;
}
.bar + .bar {
    margin-top: 6px;
}
.middle {
    display: none;
}
.bottom {
    top: 22px;
}
.toggle-button:hover {
    opacity: .7;
}
.toggle-active .bar {
    background-color: #013f7e; /*granat ciepły */
}
.toggle-active .top {
    -webkit-transform: translateY(6px) translateX(0) rotate(45deg);
}
.toggle-active .middle {
   opacity: 0;
}
.toggle-active .bottom {
    -webkit-transform: translateY(-4px) translateX(0) rotate(-45deg);
}


@media (min-width: 768px) {
    .toggle-button {
        position: relative;  /* position: fixed;*/
        top: 8px;
        left: 15px;
        padding: 22px 18px 9px 18px;
        margin: 8px 15px 8px 0;
        height: 72px;
        width: 72px;
        cursor: pointer;
        z-index: 6;
        float: left; /* extra */
        background-color: #000000;
    }
    .toggle-button:after {
        font-size: 12px;
    }
}

.overlay {
    position: absolute;
    z-index: 4;
    background-color: #1b2e44;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    visibility: hidden;
    opacity: 0;
    -webkit-transition: opacity .35s, visibility .35s, height .35s;
}
.nav-active {
    opacity: 1;
    visibility: visible;
    height: 100%;
        min-height: 400px;
/*    max-height: 340px;*/
}
.overlay ul {
    display: block;
    position: relative;
    top: 10%;
    left: 0;
    font-size: 34px;
    font-weight: 500;
    text-align: center;
    list-style: none;
    padding: 0;
}
.overlay ul li {
    display: block;
    padding: 0 0 20px 0;
}
.overlay ul li a {
    color: #fff;
    text-decoration: none;
    position: relative;
    line-height: 32px;

}
.overlay ul li a:hover {
    color: #d29b00;
}

.overlay ul li a:after {
   content: '';
    position: absolute;
    transition: transform .5s ease; 
    left: 0;
    bottom: -4px;
    width: 100%;
    height: 2px;
    background: #fff;
    transform:  scaleX(0);
}

.overlay ul li a:hover:after  {
    transform:  scaleX(1);
  }