label .menu {
    position: absolute;
    right: -100px;
    top: -100px;
    z-index: 100;
    width: 200px;
    height: 200px;
    background: #FFF;
    border-radius: 50% 50% 50% 50%;
    transition: .5s ease-in-out;
    box-shadow: 0 0 0 0 #FFF, 0 0 0 0 #FFF;
    cursor: pointer;
}

label .hamburger {
    position: absolute;
    top: 135px;
    left: 50px;
    width: 30px;
    height: 2px;
    background: #000;
    display: block;
    -webkit-transform-origin: center;
    transform-origin: center;
    transition: .5s ease-in-out;
}

label .hamburger:after,
label .hamburger:before {
    transition: .5s ease-in-out;
    content: "";
    position: absolute;
    display: block;
    width: 100%;
    height: 100%;
    background: #000;
}

label .hamburger:before {
    top: -10px;
}

label .hamburger:after {
    bottom: -10px;
}

label input {
    display: none;
}

label input:checked + .menu {
    box-shadow: 0 0 0 100vw #FFF, 0 0 0 100vh #FFF;
    border-radius: 0;
}

label input:checked + .menu .hamburger {
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
}

label input:checked + .menu .hamburger:after {
    -webkit-transform: rotate(90deg);
    transform: rotate(90deg);
    bottom: 0;
}

label input:checked + .menu .hamburger:before {
    -webkit-transform: rotate(90deg);
    transform: rotate(90deg);
    top: 0;
}

label input:checked + .menu + ul {
    opacity: 1;
}

label ul {
    list-style: none;
    z-index: 200;
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: .25s 0s ease-in-out;
}

label a {
    margin-bottom: 1em;
    display: block;
    text-align: center;
    font-size: 20px;
    color: #175569;
    text-transform: uppercase;
    text-decoration: none;
    font-family: 'Cairo', sans-serif;
    font-weight: 600;
}

@media (max-width: 1000px) {
    label ul {
        top: 397%;
        left: -8%;
    }


    label .menu {
        right: 8px;
        top: 20px;
        width: 60px;
        height: 46px;
        background: #ffffff;

    }

    label .hamburger {
        top: 22px;
        left: 17px;

    }
}

@media (max-width: 575px) {
    label ul {
        top: 450%;
        left: -112%;
    }
}

@media (max-width: 375px) {
    label a {
        font-size: 19px;
    }
    label ul {
        left: -119%;
    }
    label .menu {
        top: 11px;
    }
}

@media (max-width: 340px) {
    label a {
        font-size: 18px;
    }
}

@media (max-width: 320px) {
    label a {
        font-size: 17px;
    }
}