:root {
    --public-nav-height: 64px;
    --public-nav-paper: #ffffff;
    --public-nav-panel: #ffffff;
    --public-nav-ink: #292d34;
    --public-nav-line: rgba(30, 61, 98, 0.2);
    --public-nav-accent: #2865ad;
    --public-nav-gutter: clamp(24px, 4.2vw, 64px);
    --public-nav-ease: cubic-bezier(0.2, 0.72, 0.18, 1);
}

body.nav-open {
    overflow: hidden !important;
}

.landing-nav .visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0 0 0 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.landing-nav {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    min-height: var(--public-nav-height) !important;
    display: flex !important;
    align-items: center !important;
    gap: 24px !important;
    padding: env(safe-area-inset-top) var(--public-nav-gutter) 0 !important;
    color: var(--public-nav-ink) !important;
    background: var(--public-nav-paper) !important;
    background-image: none !important;
    border: 0 !important;
    border-bottom: 1px solid transparent !important;
    box-shadow: none !important;
    font-family: "Geist", "SF Pro Display", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif !important;
    letter-spacing: normal !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    transition: border-color 220ms ease, background-color 220ms ease !important;
}

.landing-nav.is-scrolled {
    background: var(--public-nav-paper) !important;
    border-bottom-color: var(--public-nav-line) !important;
}

.landing-brand,
.landing-brand:hover {
    flex: 0 0 auto;
    color: var(--public-nav-ink) !important;
    font-size: 18px !important;
    font-weight: 600 !important;
    line-height: 1 !important;
    letter-spacing: -0.03em !important;
    text-decoration: none !important;
    white-space: nowrap;
    transform: none !important;
}

.landing-nav-links {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 28px !important;
    min-width: 0;
    margin-left: auto;
}

.landing-nav-links a,
.landing-nav-links a:hover,
.landing-nav-links a:visited {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 0;
    color: var(--public-nav-ink) !important;
    font-size: 14px !important;
    font-weight: 450 !important;
    line-height: 1.25;
    letter-spacing: normal !important;
    text-decoration: none !important;
    white-space: nowrap;
    transform: none !important;
}

.landing-nav-links a::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 1px !important;
    background: var(--public-nav-accent) !important;
    opacity: 1 !important;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 240ms var(--public-nav-ease) !important;
}

.landing-nav-links a:hover::after,
.landing-nav-links a.is-active::after,
.landing-nav-links a.is-current::after,
.landing-nav-links a[aria-current]::after {
    transform: scaleX(1);
}

.landing-nav-links a.is-active,
.landing-nav-links a.is-current,
.landing-nav-links a[aria-current] {
    color: var(--public-nav-accent) !important;
}

.landing-nav-toggle {
    display: none;
}

body.markdown-viewer-page > .container {
    margin-top: calc(var(--public-nav-height) + 24px) !important;
}

body.about-body .about-document {
    padding-top: calc(var(--public-nav-height) + 24px) !important;
}

body.pdf-viewer-page > .header,
body.pdf-viewer-page .pdf-toolbar {
    margin-top: var(--public-nav-height);
    flex-wrap: nowrap !important;
    justify-content: space-between !important;
}

@media (max-width: 1180px) {
    .landing-nav {
        gap: 22px !important;
    }

    .landing-nav-links {
        gap: 20px !important;
    }

    .landing-nav-links a,
    .landing-nav-links a:hover,
    .landing-nav-links a:visited {
        font-size: 0.9rem !important;
    }
}

@media (max-width: 820px) {
    :root {
        --public-nav-height: 60px;
    }

    .landing-nav {
        min-height: var(--public-nav-height) !important;
        gap: 16px !important;
        padding-right: 20px !important;
        padding-left: 20px !important;
    }

    .landing-nav-toggle {
        position: relative;
        width: 40px;
        height: 40px;
        display: inline-flex !important;
        flex: 0 0 40px;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 6px;
        margin-left: auto;
        padding: 0 !important;
        color: var(--public-nav-ink) !important;
        background: transparent !important;
        border: 0 !important;
        border-radius: 4px !important;
        box-shadow: none !important;
        cursor: pointer;
    }

    .landing-nav-toggle span:not(.visually-hidden) {
        width: 18px;
        height: 1.5px;
        display: block;
        background: currentColor;
        transition: transform 220ms ease;
    }

    .landing-nav-toggle[aria-expanded="true"] span:first-child {
        transform: translateY(3.75px) rotate(45deg);
    }

    .landing-nav-toggle[aria-expanded="true"] span:nth-child(2) {
        transform: translateY(-3.75px) rotate(-45deg);
    }

    .landing-nav-toggle:hover { background: #f6f7f8 !important; }
    .landing-nav-toggle:focus-visible { outline-offset: 1px !important; }

    .landing-nav-links {
        position: fixed;
        top: calc(var(--public-nav-height) + env(safe-area-inset-top) + 8px);
        right: 20px;
        left: auto;
        z-index: 1001;
        width: min(220px, calc(100vw - 40px));
        max-height: calc(100dvh - var(--public-nav-height) - env(safe-area-inset-top) - 24px);
        display: grid;
        grid-template-columns: 1fr;
        gap: 0 !important;
        margin: 0;
        padding: 6px;
        overflow-y: auto;
        background: #ffffff !important;
        border: 1px solid var(--public-nav-line) !important;
        border-radius: 6px !important;
        box-shadow: 0 8px 24px rgb(30 40 50 / 8%) !important;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-4px);
        transition: opacity 160ms ease, transform 160ms var(--public-nav-ease);
    }

    .landing-nav-links.is-open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .landing-nav-links a,
    .landing-nav-links a:hover,
    .landing-nav-links a:visited {
        min-height: 44px;
        padding: 0 14px;
        font-size: 15px !important;
        font-weight: 450 !important;
        border-radius: 3px;
        border-bottom: 0;
    }

    .landing-nav-links a::after { display: none; }
    .landing-nav-links a:hover { background: #f6f7f8; }
    .landing-nav-links a[aria-current] { background: #f1f5f9; }

    body.markdown-viewer-page > .container {
        margin-top: calc(var(--public-nav-height) + 12px) !important;
    }

    body.about-body .about-document {
        padding-top: calc(var(--public-nav-height) + 12px) !important;
    }

    body.pdf-viewer-page > .header,
    body.pdf-viewer-page .pdf-toolbar {
        min-height: 64px !important;
        padding: max(10px, env(safe-area-inset-top)) max(10px, env(safe-area-inset-right)) 10px max(10px, env(safe-area-inset-left)) !important;
        gap: 8px !important;
    }
}


@media (prefers-reduced-motion: reduce) {
    .landing-nav,
    .landing-nav-links,
    .landing-nav-links a::after,
    .landing-nav-toggle span {
        transition-duration: 0.001ms !important;
    }
}

/* Portrait belongs on the homepage only. */
body.about-body .about-prototype-photo,
body.about-body .about-left .avatar { display: none !important; }
body.about-body .about-prototype-identity { grid-template-columns: minmax(0, 1fr) auto !important; }
@media (max-width: 700px) {
    body.about-body .about-prototype-identity { grid-template-columns: 1fr !important; }
}