/* ==========================================================================
   Site navigation — shared by every page (home, About, the case studies,
   Privacy). Plain CSS, scoped to .hxn-*; driven by assets/js/shared/nav.js.
   A fixed bar: clear over the opening, then a condensed frosted bar with a
   line of brand light that tracks progress down the page. Below 1024px the
   links fold into a full-screen menu.
   ========================================================================== */

:root {
    --hx-purple: #7c3aed;
    --hx-cyan: #0ea5e9;
    --hx-pink: #f472b6;
    --hx-night: #020617;
    --hx-ease: cubic-bezier(0.22, 1, 0.36, 1);
    --hx-gutter: clamp(1.25rem, 4.2vw, 3.5rem);
    --hx-max: 82rem;
}

.hxn {
    position: fixed;
    inset: 0 0 auto;
    z-index: 60;
    padding: calc(env(safe-area-inset-top, 0px) + 1.35rem) var(--hx-gutter) 1.35rem;
    border-bottom: 1px solid transparent;
    transition:
        padding 0.55s var(--hx-ease),
        background-color 0.55s var(--hx-ease),
        border-color 0.55s var(--hx-ease),
        -webkit-backdrop-filter 0.55s var(--hx-ease),
        backdrop-filter 0.55s var(--hx-ease);
}

/* A thin line of brand light tracks progress through the page. */
.hxn::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 2px;
    background: linear-gradient(90deg, var(--hx-purple), var(--hx-cyan) 60%, var(--hx-pink));
    transform: scaleX(var(--hxn-progress, 0));
    transform-origin: left;
    opacity: 0;
    transition: opacity 0.5s var(--hx-ease);
}

.hxn.is-condensed::after {
    opacity: 0.9;
}

.hxn.is-condensed {
    padding-top: calc(env(safe-area-inset-top, 0px) + 0.7rem);
    padding-bottom: 0.7rem;
    /* A page may tint the bar (--hxn-bar). */
    background-color: var(--hxn-bar, rgba(2, 6, 23, 0.86));
    border-bottom-color: rgba(255, 255, 255, 0.07);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    backdrop-filter: blur(16px) saturate(140%);
}

.hxn-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    max-width: var(--hx-max);
    margin: 0 auto;
}

.hxn-brand {
    display: inline-flex;
    flex: none;
    border-radius: 0.25rem;
}

.hxn-logo {
    display: block;
    height: 2.55rem;
    width: auto;
    transition: height 0.55s var(--hx-ease), filter 0.45s var(--hx-ease);
}

.hxn.is-condensed .hxn-logo {
    height: 2.2rem;
}

.hxn-links {
    display: none;
    align-items: center;
    gap: clamp(1.5rem, 2.4vw, 2.4rem);
    margin: 0;
    padding: 0;
    list-style: none;
}

.hxn-link {
    position: relative;
    display: inline-block;
    padding: 0.5rem 0;
    font-family: "Manrope", sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.005em;
    color: rgba(240, 240, 248, 0.76);
    text-decoration: none;
    transition: color 0.35s var(--hx-ease);
}

.hxn-link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0.2rem;
    height: 1px;
    background: linear-gradient(90deg, var(--hx-purple), var(--hx-cyan));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s var(--hx-ease);
}

.hxn-link:hover,
.hxn-link[aria-current] {
    color: #fff;
}

.hxn-link:hover::after,
.hxn-link[aria-current]::after {
    transform: scaleX(1);
}

.hxn-cta {
    display: none;
    align-items: center;
    gap: 0.6rem;
    flex: none;
    height: 2.75rem;
    padding: 0 1.3rem;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 0.375rem;
    background: rgba(255, 255, 255, 0.04);
    font-family: "Space Grotesk", sans-serif;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: #fff;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    isolation: isolate;
    transition: background-color 0.45s var(--hx-ease), border-color 0.45s var(--hx-ease), transform 0.5s var(--hx-ease);
}

/* The same soft sheen as the hero button, crossing it on hover. */
.hxn-cta::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, 0.22) 50%, transparent 70%);
    transform: translateX(-110%);
}

.hxn-cta-dot {
    width: 0.4rem;
    height: 0.4rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--hx-purple), var(--hx-cyan));
    box-shadow: 0 0 10px rgba(14, 165, 233, 0.7);
}

.hxn-cta:hover {
    border-color: rgba(124, 58, 237, 0.7);
    background: rgba(124, 58, 237, 0.22);
}

@media (hover: hover) and (pointer: fine) {
    .hxn-cta:hover {
        transform: scale(1.035);
    }

    .hxn-cta:hover::before {
        transform: translateX(110%);
        transition: transform 0.9s var(--hx-ease);
    }
}

.hxn a:focus-visible,
.hxn button:focus-visible,
.hxn-panel a:focus-visible {
    outline: 2px solid var(--hx-cyan);
    outline-offset: 4px;
}

/* ---------- Compact menu (below 1024px) ---------- */

.hxn-toggle {
    position: relative;
    z-index: 2;
    display: inline-grid;
    place-items: center;
    width: 2.9rem;
    height: 2.9rem;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 0.375rem;
    background: rgba(2, 6, 23, 0.4);
    color: #fff;
    cursor: pointer;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.hxn-toggle-bars {
    position: relative;
    width: 1.05rem;
    height: 0.55rem;
}

.hxn-toggle-bars::before,
.hxn-toggle-bars::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    height: 1.5px;
    border-radius: 2px;
    background: currentColor;
    transition: transform 0.45s var(--hx-ease), top 0.45s var(--hx-ease);
}

.hxn-toggle-bars::before {
    top: 0;
}

.hxn-toggle-bars::after {
    top: calc(100% - 1.5px);
}

.hxn-open .hxn-toggle-bars::before {
    top: calc(50% - 0.75px);
    transform: rotate(45deg);
}

.hxn-open .hxn-toggle-bars::after {
    top: calc(50% - 0.75px);
    transform: rotate(-45deg);
}

.hxn-panel {
    position: fixed;
    inset: 0;
    z-index: 55;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1.5rem;
    overflow-y: auto;
    padding: calc(env(safe-area-inset-top, 0px) + 7rem) var(--hx-gutter) calc(env(safe-area-inset-bottom, 0px) + 2.5rem);
    background:
        radial-gradient(40rem 30rem at 85% 0%, rgba(124, 58, 237, 0.28), transparent 60%),
        radial-gradient(30rem 24rem at 0% 100%, rgba(14, 165, 233, 0.14), transparent 60%),
        var(--hx-night);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.45s var(--hx-ease), visibility 0s linear 0.45s;
}

.hxn-open .hxn-panel {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.45s var(--hx-ease), visibility 0s;
}

.hxn-panel > * {
    flex: none;
}

.hxn-panel-links {
    margin: 0;
    padding: 0;
    list-style: none;
}

.hxn-panel-links li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.hxn-panel-link {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding: 1rem 0;
    font-family: "Manrope", sans-serif;
    font-size: clamp(1.9rem, 8vw, 2.6rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: #fff;
    text-decoration: none;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.5s var(--hx-ease), transform 0.6s var(--hx-ease);
}

.hxn-panel-link small {
    font-family: "Space Grotesk", sans-serif;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: rgba(255, 255, 255, 0.4);
}

.hxn-open .hxn-panel-link {
    opacity: 1;
    transform: none;
    transition-delay: calc(80ms + var(--i, 0) * 55ms);
}

/* Short phones: a little less room between the links. */
@media (max-height: 700px) {
    .hxn-panel-link {
        padding: 0.75rem 0;
    }
}

/* The social links, under the menu list. */
.hxn-panel-social {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.25rem;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.5s var(--hx-ease), transform 0.6s var(--hx-ease);
}

.hxn-open .hxn-panel-social {
    opacity: 1;
    transform: none;
    transition-delay: calc(80ms + var(--i, 0) * 55ms);
}

.hxn-panel-social a {
    display: inline-grid;
    place-items: center;
    width: 3rem;
    height: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 0.375rem;
    background: rgba(255, 255, 255, 0.05);
    color: rgba(226, 228, 240, 0.9);
    transition: color 0.3s ease, border-color 0.3s ease, background-color 0.3s ease, scale 0.3s ease;
}

.hxn-panel-social svg {
    width: 1.4rem;
    height: 1.4rem;
}

.hxn-panel-social a:hover,
.hxn-panel-social a:active {
    color: #fff;
    border-color: rgba(124, 58, 237, 0.6);
    background: rgba(124, 58, 237, 0.18);
    scale: 1.05;
}

.hxn-panel-cta {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 3.5rem;
    border-radius: 0.375rem;
    background: linear-gradient(100deg, var(--hx-purple), #4f46e5 50%, var(--hx-cyan));
    font-family: "Space Grotesk", sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: #fff;
    text-decoration: none;
}

.hxn-menu-locked {
    overflow: hidden;
}

@media (min-width: 1024px) {
    .hxn-logo {
        height: 3rem;
    }

    .hxn.is-condensed .hxn-logo {
        height: 2.45rem;
    }

    .hxn-links,
    .hxn-cta {
        display: flex;
    }

    .hxn-toggle,
    .hxn-panel {
        display: none;
    }
}

/* ---------- Over a light opening (.hxn--light) ----------
   The navigation starts in dark ink, and turns light once its bar appears
   (or the menu opens). A page may set the ink (--hxn-ink, --hxn-ink-strong). */

:root:not(.hxn-open) .hxn--light:not(.is-condensed) .hxn-logo {
    filter: brightness(0) saturate(100%) opacity(0.8);
}

:root:not(.hxn-open) .hxn--light:not(.is-condensed) .hxn-link {
    color: var(--hxn-ink, rgba(12, 11, 29, 0.72));
}

:root:not(.hxn-open) .hxn--light:not(.is-condensed) .hxn-link:hover,
:root:not(.hxn-open) .hxn--light:not(.is-condensed) .hxn-link[aria-current] {
    color: var(--hxn-ink-strong, #0c0b1d);
}

:root:not(.hxn-open) .hxn--light:not(.is-condensed) .hxn-cta {
    border-color: rgba(12, 11, 29, 0.2);
    background: rgba(255, 255, 255, 0.45);
    color: var(--hxn-ink-strong, #0c0b1d);
}

:root:not(.hxn-open) .hxn--light:not(.is-condensed) .hxn-cta:hover {
    border-color: rgba(124, 58, 237, 0.55);
    background: rgba(124, 58, 237, 0.1);
}

:root:not(.hxn-open) .hxn--light:not(.is-condensed) .hxn-toggle {
    border-color: rgba(12, 11, 29, 0.14);
    background: rgba(255, 255, 255, 0.55);
    color: var(--hxn-ink-strong, #0c0b1d);
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
    .hxn,
    .hxn-logo,
    .hxn-panel,
    .hxn-panel-link,
    .hxn-panel-social,
    .hxn-cta,
    .hxn-cta::before {
        transition: none;
    }
}