* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

nav.site-nav,
nav.site-nav a,
nav.site-nav button {
    /* Load matching wght in the Google Fonts URL, or the browser may substitute a non-mono face */
    font-family: "IBM Plex Mono", ui-monospace, Menlo, Monaco, monospace;
    font-weight: 300;
    font-synthesis: none;
    letter-spacing: 0;
    word-spacing: normal;
    font-variant-ligatures: none;
    font-feature-settings: "liga" 0, "calt" 0, "clig" 0;
    font-variant-numeric: tabular-nums;
}

nav.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 0.5px solid #000000;
    /* Bar background extends into notch; content sits below safe area */
    padding: calc(0.5rem + env(safe-area-inset-top, 0px)) 0 0.5rem;
    background: rgba(255, 255, 255, 0.92);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

nav.site-nav .nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    width: 100%;
    max-width: 72rem;
    padding-inline: clamp(0.75rem, 3vw, 1.25rem);
}

nav.site-nav .left {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1rem;
    min-width: 0;
}

nav.site-nav .nav-search {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-shrink: 0;
}

nav.site-nav .nav-search input[type="search"] {
    width: 7rem;
    min-width: 0;
    font-size: 12px;
}

@media (min-width: 480px) {
    nav.site-nav .nav-search input[type="search"] {
        width: 10rem;
    }
}

@media (min-width: 720px) {
    nav.site-nav .nav-search input[type="search"] {
        width: 13rem;
    }
}

nav.site-nav .nav-search button {
    font-size: 12px;
    padding: 2px 10px;
    min-height: auto;
}

nav.site-nav .left a {
    color: #000;
}

nav.site-nav .left a.logo {
    text-decoration: none;
    margin-right: 10px;
    box-shadow: inset 0 1px 0 rgba(0, 0, 0, 0.12), inset 1px 0 0 rgba(0, 0, 0, 0.12);
}

nav.site-nav .lang-switch {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 0;
}

nav.site-nav .lang-btn {
    border: none;
    background: transparent;
    padding: 2px 6px;
    cursor: pointer;
    color: #000;
    text-decoration: underline;
    font-size: 12px;
}

nav.site-nav .lang-btn[aria-current="true"] {
    text-decoration: none;
    font-weight: 400;
}

nav.site-nav .lang-sep {
    font-size: 12px;
    opacity: 0.5;
    user-select: none;
}

@media (max-width: 640px) {
    nav.site-nav .nav-inner {
        flex-wrap: wrap;
        row-gap: 0.5rem;
    }

    nav.site-nav .nav-search {
        width: 100%;
        justify-content: flex-end;
    }

    /* ~44px minimum touch targets (WCAG 2.5.5) */
    nav.site-nav .lang-btn {
        min-height: 44px;
        min-width: 44px;
        padding: 0.25rem 0.5rem;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    nav.site-nav .nav-search button {
        min-height: 44px;
        padding: 0.35rem 12px;
    }

    nav.site-nav .nav-search input[type="search"] {
        min-height: 44px;
        padding: 0.25rem 0.5rem;
        box-sizing: border-box;
    }
}