.nav {
    position: sticky;
    position: sticky;
    width: -webkit-fill-available;
    text-align: center;
}

.logo, .navbar {
    display: inline-flex;
    vertical-align: middle;
}

.logo { 
    width: 3vw;
    margin-right: 0.5vw;
    margin-right: 0.5vw;
}

.navbar {
    color: white;
    font-family: "Amarna", sans-serif;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 2px;
    gap: 1vw;
}

.navbar a,
.nav-btn {
    color: white;
    text-decoration: none;
    position: relative;
    padding: 1vh 2vw;
    font-family: "Amarna", sans-serif;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 2px;
    font-size: medium;
    cursor: pointer;
    text-shadow: 2px 2px 2px black;
    border: none;
    background: transparent;
    overflow: visible;
}

.navbar a::before,
.nav-btn::before {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: width 0.3s ease, left 0.3s ease;
    opacity: 1;
    z-index: 1;
}

.navbar a:hover::before,
.nav-btn:hover::before {
    width: 60%;
    left: 20%;
}

.navbar a:nth-child(4) {
    color: goldenrod;
}

.nav-user {
    color: #fff;
    background: linear-gradient(90deg, #6a11cb 0%, #2575fc 100%);
    border: none;
    border-radius: 8px;
    font-family: "Amarna", sans-serif;
    text-transform: uppercase;
    font-weight: 900;
    letter-spacing: 2px;
    font-size: medium;
    padding: 1vh 2vw;
    text-shadow: 0 0 5px rgba(0,0,0,0.7);
    cursor: default;
    display: inline-flex;
    align-items: center;
    gap: 0.4vw;
    user-select: none;
    box-shadow: 0 0 10px #2575fcaa;
    transition: box-shadow 0.3s ease;
}

.nav-user i {
    font-size: 1.2em;
}

.nav-user:hover {
    box-shadow: 0 0 15px #6a11cbcc;
}

@media (max-width: 768px) {
    .logo { 
        width: 15vw;
    }

    .navbar {
        margin: 0 3vw;
        text-align: center;
    }

    .navbar a,
    .nav-btn,
    .nav-user {
        padding: 1vh 1.5vw;
        font-size: x-small;
    }
}