:root {
    --global-nav-height: 76px;
    --global-nav-bg: #06080b;
    --global-nav-fg: #f7f6f2;
    --global-nav-muted: rgba(247, 246, 242, 0.52);
    --global-nav-font: "Arial Narrow", "Roboto Condensed", "Bahnschrift Condensed", "Helvetica Neue", sans-serif;
}

body.has-global-header {
    padding-top: var(--global-nav-height);
}

.gem-hero {
    min-height: calc(100vh - var(--global-nav-height));
}

.global-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10000;
    height: var(--global-nav-height);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 28px;
    padding: 0 34px;
    background: rgba(6, 8, 11, 0.96);
    color: var(--global-nav-fg);
    backdrop-filter: blur(18px) saturate(120%);
}

.global-wordmark {
    justify-self: start;
    color: var(--global-nav-fg);
    font-family: var(--global-nav-font);
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    line-height: 1;
    text-decoration: none;
}

.global-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 34px;
}

.global-links a {
    position: relative;
    padding: 28px 0 24px;
    color: var(--global-nav-muted);
    font-family: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    line-height: 1;
    text-decoration: none;
    transition: color 180ms ease;
}

.global-links a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 100%;
    bottom: 18px;
    height: 1px;
    background: currentColor;
    transition: right 180ms ease;
}

.global-links a:hover,
.global-links a:focus-visible,
.global-links a[aria-current="page"] {
    color: var(--global-nav-fg);
}

.global-links a:hover::after,
.global-links a:focus-visible::after,
.global-links a[aria-current="page"]::after {
    right: 0;
}

.global-context {
    justify-self: end;
    display: flex;
    gap: 18px;
    color: var(--global-nav-muted);
    font-family: var(--global-nav-font);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    line-height: 1;
    white-space: nowrap;
}

.global-menu {
    display: none;
    border: 0;
    background: transparent;
    color: var(--global-nav-fg);
    cursor: pointer;
}

.global-menu-lines {
    display: flex;
    width: 22px;
    flex-direction: column;
    gap: 5px;
}

.global-menu-lines i {
    display: block;
    width: 100%;
    height: 1px;
    background: currentColor;
    transition: transform 220ms ease;
}

@media (max-width: 820px) {
    :root {
        --global-nav-height: 66px;
    }

    .global-header {
        grid-template-columns: 1fr auto;
        padding: 0 22px;
    }

    .global-context {
        display: none;
    }

    .global-menu {
        justify-self: end;
        display: inline-flex;
        align-items: center;
        gap: 12px;
        font-family: var(--global-nav-font);
        font-size: 0.68rem;
        font-weight: 600;
        letter-spacing: 0.16em;
    }

    .global-header.is-nav-open .global-menu-lines i:first-child {
        transform: translateY(3px) rotate(45deg);
    }

    .global-header.is-nav-open .global-menu-lines i:last-child {
        transform: translateY(-3px) rotate(-45deg);
    }

    .global-links {
        position: fixed;
        top: var(--global-nav-height);
        left: 0;
        right: 0;
        display: grid;
        justify-items: start;
        gap: 0;
        padding: 18px 22px 26px;
        background: rgba(6, 8, 11, 0.98);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-18px);
        visibility: hidden;
        transition: opacity 220ms ease, transform 220ms ease, visibility 220ms;
    }

    .global-header.is-nav-open .global-links {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
        visibility: visible;
    }

    .global-links a {
        width: 100%;
        padding: 14px 0;
        font-size: 1.15rem;
    }

    .global-links a::after {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .global-links,
    .global-links a,
    .global-links a::after,
    .global-menu-lines i {
        transition-duration: 0.01ms;
    }
}