input {
    position: fixed;
    opacity: 0;
}
label {
    position: absolute;
    margin: 0;
    padding: 0;
    border: none;
    outline: none;
    background: none;
    cursor: pointer;
}
label::before {
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(10, 38, 57, .75);
    content: '';
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}
label .burger {
    position: fixed;
    top: 2em;
    right: 2em;
    z-index: 3;
    width: 2.5em;
    height: 2em;
    margin: 0;
    padding: 0;
    transition: opacity 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}
label .burger::before, label .burger .bar, label .burger::after {
    position: absolute;
    left: 0;
    display: block;
    width: 100%;
    height: 11%;
    background: #333;
    content: '';
    transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}
label .burger .bar {
    top: 44%;
}
label .burger::before {
    top: 0;
    transform-origin: top left;
}
label .burger::after {
    bottom: 0;
    transform-origin: bottom left;
}
input:focus + label .burger, label:hover .burger {
    opacity: 0.75;
}
nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 2;
    display: flex!important;
    flex-flow: column nowrap;
    justify-content: center;
    align-items: flex-start;
    transform: translate3d(0, 0, 0);
   /* material acceleration */
    transform: translateX(180%);
    will-change: transform;
    transition: transform 0.5s cubic-bezier(0.22, 0.22, 0.10, 1);
}
nav::before {
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    z-index: -1;
    width: 25em;
    background: #fcca00;
    content: '';
    transform: skewX(15deg) translateX(180%);
    transform-origin: bottom left;
    will-change: transform;
    transition: transform 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}
@media (min-width: 40em) {
    nav::before {
        width: 30em;
   }
}
nav a {
    margin: 0.5em 0;
    padding: 0.2em 2em;
    font-size: 2em;
    color: white;
    text-decoration: none;
    font-weight: 500;
    transform: translateX(-100%);
    transition: color 0.15s, transform 0.5s;
    transition-timing-function: cubic-bezier(0.19, 1, 0.22, 1);
    font-family: 'Roboto Condensed', sans-serif;

}
nav a.active{
    color: #000;
    text-decoration: underline;
}
nav a:nth-child(1) {
    transition-delay: 0s, 100ms;
}
nav a:nth-child(2) {
    transition-delay: 0s, 150ms;
}
nav a:nth-child(3) {
    transition-delay: 0s, 200ms;
}
nav a:nth-child(4) {
    transition-delay: 0s, 250ms;
}
nav a:nth-child(5) {
    transition-delay: 0s, 300ms;
}
nav a:nth-child(6) {
    transition-delay: 0s, 350ms;
}
nav a:hover, nav a:focus {
    color: #333;
}
main {
    overflow: hidden;
}
main .content {
    transform: translate3d(0, 0, 0);
   /* material acceleration */
    will-change: transform, filter;
    transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}
[id="navcheck"]:checked + label::before {
    opacity: 1;
    pointer-events: auto;
}
[id="navcheck"]:checked + label .burger::before, [id="navcheck"]:checked + label .burger::after {
    width: 115.42%;
}
[id="navcheck"]:checked + label .burger::before {
    transform: rotate(45deg) translateY(-50%);
}
[id="navcheck"]:checked + label .burger::after {
    transform: rotate(-45deg) translateY(50%);
}
[id="navcheck"]:checked + label .burger .bar {
    transform: scale(0.1);
}
[id="navcheck"]:checked ~ nav {
    transform: translateX(0);
}
[id="navcheck"]:checked ~ nav::before {
    transform: skewX(-15deg) translateX(0);
}
[id="navcheck"]:checked ~ nav a {
    transform: translateX(0);
}
[id="navcheck"]:checked ~ main .content {
    transform: translateX(3em);
    transform-origin: left center;
    filter: blur(2px);
}
/* helper */
.visuallyhidden {
    border: 0;
    clip: rect(0 0 0 0);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
}