.topbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    border-bottom: 1px solid rgba(255,255,255,.09);
    background: linear-gradient(180deg, rgba(6,10,8,.94), rgba(4,7,5,.82));
    box-shadow: 0 10px 34px rgba(0,0,0,.28);
    backdrop-filter: blur(18px) saturate(130%);
    -webkit-backdrop-filter: blur(18px) saturate(130%);
}

.topbar-inner {
    width: min(1560px, calc(100% - 40px));
    min-height: 64px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(190px, 1fr) auto minmax(190px, 1fr);
    align-items: center;
    gap: 24px;
}

.topbar a {
    text-decoration: none;
}

.topbar-brand {
    width: max-content;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #e6efeb;
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .26em;
}

.brand-orb {
    width: 10px;
    height: 10px;
    border: 1px solid rgba(255,255,255,.78);
    border-radius: 50%;
    background: radial-gradient(circle at 34% 28%, #fff 0 18%, #d9e2de 32%, #66716c 66%, #1d2421 100%);
    box-shadow: 0 0 14px rgba(220,240,232,.32);
}

.world-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(18px, 3vw, 42px);
}

.world-nav a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #a7b1ad;
    font-size: .8rem;
    white-space: nowrap;
    transition: color .25s ease, transform .25s ease;
}

.world-nav a:hover,
.world-nav a:focus-visible {
    color: #fff;
    transform: translateY(-1px);
    outline: none;
}

.nav-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: currentColor;
    transition: box-shadow .25s ease, transform .25s ease;
}

.nav-dot-apps { color: #20f29b; }
.nav-dot-os { color: #28a8ff; }
.nav-dot-cradles { color: #f1ae42; }

.world-nav a:hover .nav-dot,
.world-nav a:focus-visible .nav-dot {
    transform: scale(1.24);
    box-shadow: 0 0 14px currentColor;
}

.topbar-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 18px;
}

.github-link {
    color: #89958f;
    font-size: .78rem;
}

.github-link:hover,
.github-link:focus-visible {
    color: #fff;
    outline: none;
}

.language-switch {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 11px;
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 999px;
    background: rgba(255,255,255,.035);
    color: #56615c;
}

.language-button {
    appearance: none;
    border: 0;
    padding: 0;
    background: transparent;
    color: #727e78;
    font: inherit;
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .08em;
    cursor: pointer;
}

.language-button:hover,
.language-button:focus-visible {
    color: #d8e0dc;
    outline: none;
}

.language-button.is-active {
    color: #fff;
    text-shadow: 0 0 12px rgba(255,255,255,.28);
}

@media (max-width: 980px) {
    .topbar-inner {
        grid-template-columns: 1fr auto;
        gap: 16px;
    }

    .world-nav {
        display: none;
    }
}

@media (max-width: 560px) {
    .topbar-inner {
        width: min(100% - 24px, 680px);
        min-height: 56px;
    }

    .topbar-brand {
        font-size: .65rem;
        letter-spacing: .20em;
    }

    .github-link {
        display: none;
    }

    .topbar-actions {
        gap: 10px;
    }
}