nav {
    position: sticky;
    top: 0;
    margin: 0;
    background: #ffedda;
    z-index: 500;
    padding-left: 5px;
}

.mobile-menu-button {
    display: block;
    float: right;
    width: 50px;
    border: 1px solid rgba(255,255,255,.2);
    padding: 10px;
    margin: 7px 5px 7px 0;
    border-radius: 5px;
    display: none;
}

.mobile-menu-button + input[type="checkbox"] {
    display: none;
}

.mobile-menu-button + input[type="checkbox"]:checked ~ .navigation li:not(:first-child) {
    display: block;
}

.mobile-menu-button:hover {
        span {background: white;}
        background: #066;
}
.mobile-menu-button span {
    display: block;
    height: 4px;
    background: #066;
    margin: 0 0 4px 0;
    border-radius: 2px
}
.mobile-menu-button span:last-of-type {
    margin: 0
}

.mobile-menu-button + input[type="checkbox"] {
    display: none
}

nav a {
    color: #066;
    text-decoration: none;
    display: block;
    padding: 3px 15px;
    margin: 0 6px;
    border-radius: 10px;
    transition: all .5s;
    font-family: Oswald;
}

nav a:hover {
    background: #066;
    color: white;
    transition: all .5s;
}

nav a:hover::before {
    transition: all .5s;
}

nav ul {
    list-style: none;
}

nav ul li {
    float: left;
    padding: 15px 0;
}

nav::after {
    content:'';
    clear: both;
    display: table
}

@media(max-width:900px) {
    nav li a {
        font-family: Oswald;
        padding: 3px 5px;
    }
}

@media(max-width:600px) {
    nav li a {
        font-size: 80%;
    }
}

@media(max-width:500px) {
    .mobile-menu-button {
        display: block
    }
    .navigation li:not(:first-child) {
        display: none
    }
    .navigation li {
        float: none;
        border-top: 1px solid rgba(255,255,255,.2)
    }
    nav li a {
        font-size: 16px;
        font-family: Oswald;
        width: 40%;
    }
}