.site-language-picker {
    position: fixed;
    top: max(16px, env(safe-area-inset-top));
    right: max(16px, env(safe-area-inset-right));
    z-index: 1000;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html[data-language="zh"] [data-lang="en"],
html[data-language="en"] [data-lang="zh"] {
    display: none !important;
}

.site-language-toggle {
    min-width: 44px;
    min-height: 44px;
    padding: 0 12px;
    border: 1px solid color-mix(in srgb, currentColor 18%, transparent);
    border-radius: 999px;
    background: color-mix(in srgb, Canvas 92%, transparent);
    color: CanvasText;
    box-shadow: 0 1px 2px rgba(0, 0, 0, .04);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    cursor: pointer;
    font: inherit;
    font-size: 12px;
    font-weight: 650;
    letter-spacing: .04em;
    transition: background 180ms ease, border-color 180ms ease;
}

.site-language-toggle:hover {
    background: Canvas;
    border-color: color-mix(in srgb, currentColor 32%, transparent);
}

.site-language-toggle:focus-visible {
    outline: 3px solid color-mix(in srgb, #5e6ad2 35%, transparent);
    outline-offset: 2px;
}

@media (max-width: 640px) {
    .site-language-picker {
        top: max(10px, env(safe-area-inset-top));
        right: max(10px, env(safe-area-inset-right));
    }
}

@media print {
    .site-language-picker { display: none !important; }
}