@keyframes sideShift 
{
    0% 
    { 
        max-width: 0; 
        opacity: .7;
    }    
    100% 
    { 
        max-width: 99px; 
        opacity: 1;
    }    
}

nav
{
    position: fixed;
    background: hsl(240.88deg 13.18% 9.74%);
    border-radius: 10px 10px 0 0;
    height: 50px;
    width: 100%;
    bottom: -1px;
    z-index: 100;
    -webkit-user-select: none;
    user-select: none;
    padding: 0 15px;
    box-sizing: border-box;
}
.navigation-mode
{
    display: none;
    justify-content: space-between;
}
.navigation-mode-active
{
    display: flex;
}
.navigation-button
{
    color: black;
    filter: invert(1);
    height: 25px;
    width: 25px;
    margin: 9px;
    padding: 3px 20px;
    position: relative;
    font-size: 22px;
    transition: .2s;
}
.navigation-button-marked::after
{
    content: "";
    position: absolute;
    background: hsl(44.5deg 100% 23.53%);
    border-radius: 25%;
    height: 5px;
    width: 30%;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    animation: 1s sideShift;
}
#navigation-deal-accept 
{
    margin: 10px auto;
    font-size: 14px;
    background: hsl(276deg 5% 85%);
    height: 20px;
    line-height: 20px;
    border-radius: 20px;
    text-align: center;
    font-family: sans-serif;
}
@media screen and (min-width: 767px)
{
    nav
    {
        display: none;
    }
}