.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    min-height: var(--nav-height);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    background:
            linear-gradient(to bottom, rgba(6, 7, 10, 0.82), rgba(6, 7, 10, 0.50));
    border-bottom: 1px solid rgba(255,255,255,0.10);
    box-shadow:
            0 10px 40px rgba(0,0,0,0.24),
            inset 0 1px 0 rgba(255,255,255,0.08);
}

.site-header .container {
    min-height: var(--nav-height);
    display: flex;
    align-items: center;
    gap: 20px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 14px;
}

.brand-orb {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-image: url("/static/logos/sse.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    box-shadow: var(--glow-pink), var(--glow-cyan);
    flex: 0 0 auto;
    background-color: rgba(255,255,255,0.06);
}

.brand-copy {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.brand-title {
    margin: 0;
    font-size: 1rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.96);
}

.brand-subtitle {
    margin: 0;
    font-size: 0.72rem;
    letter-spacing: 0.20em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.48);
}

.nav {
    display: flex;
    flex: 1;
    justify-content: center;
    flex-wrap: nowrap;
    gap: 10px;
    min-width: 0;
}

.nav a {
    padding: 10px 14px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.06);
    color: rgba(255,255,255,0.92);
    transition:
            transform var(--ease),
            border-color var(--ease),
            background var(--ease),
            box-shadow var(--ease);
}

.nav a:hover {
    transform: translateY(-2px);
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.22);
    box-shadow:
            0 0 22px rgba(23,220,255,0.10),
            0 0 18px rgba(255,47,171,0.08);
}

.nav a.active {
    background: rgba(255,255,255,0.09);
    border-color: rgba(255,255,255,0.16);
    color: #ffffff;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

#auth-slot {
    margin-left: auto;
    flex-shrink: 0;
}

.auth-user-menu {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: nowrap;
}


@media (max-width: 1200px) {
    .nav {
        display: none;
    }
}