nav {
    display: flex;
    flex-direction: row;
    align-items: center;
    background: #141731;
    height: 4rem;
    position: fixed;
    width: 100%;
}

nav a {
    text-decoration: none;
    color: #f5f5f5;
    padding: 0 12px;
    font-size: 20px;
    position: relative;
}

nav a:hover {
    color: #727FB1;
}

nav a:not(:first-of-type)::before {
    content: '';
    position: absolute;
    width: 80%;
    height: 4px;
    margin: 0 10%;
    border-radius: 4px;
    background-color: #FF4A57;
    bottom: -5px;
    left: 0;
    transform-origin: right;
    transform: scaleX(0);
    transition: transform .3s ease-in-out;
}

nav a:not(:first-of-type):hover::before {
    transform-origin: left;
    transform: scaleX(1);
}

nav img {
    width: 3.75rem;
    height: 3.75rem;
}

nav a:first-of-type {
    padding: 0 6px;
}


nav > div > div {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
}

nav > div {
    position: relative;
    top: 14.4%;
    width: 59px;
    height: 29px;
    margin: -16px 10px 0 auto;
    overflow: hidden;
    border-radius: 100px;
}

nav input {
    position: relative;
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    opacity: 0;
    cursor: pointer;
    z-index: 3;
}

nav > div > div:first-of-type {
    z-index: 2;
}

nav > div > div:last-of-type {
    width: 100%;
    background-color: #FF4A57;
    transition: 0.3s ease all;
    z-index: 1;
}

nav > div > div:first-of-type::before {
    content: url(../images/germanyFlag.png);
    position: absolute;
    top: 3px;
    left: 3px;
    width: 24px;
    height: 20px;
    padding-top: 2px;
    padding-bottom: 2px;
    text-align: center;
    background-color: #272a40;
    border-radius: 50%;
    transition: 0.3s ease all, left 0.3s;
}

nav input:active + div:first-of-type::before {
    width: 46px;
    border-radius: 100px;
}

nav input:checked:active + div:first-of-type::before {
    margin-left: -26px;
}

nav input:checked + div:first-of-type::before {
    content: url(../images/englandFlag.png);
    left: 32px;
}

nav img:hover {
    -webkit-animation: jello-horizontal 0.85s;
    animation: jello-horizontal 0.85s;
}