.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  color: var(--white);
  text-shadow: 0 1px 18px rgba(0, 0, 0, 0.32);
  animation: headerReveal 1300ms var(--ease-out) 260ms both;
  transition: color 320ms ease, text-shadow 320ms ease;
}

.nav {
  position: relative;
  z-index: 24;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 68px;
  padding: 0 34px 0 24px;
  transition: background 320ms ease, border-color 320ms ease, backdrop-filter 320ms ease;
}

.site-header.is-scrolled .nav {
  background: rgba(8, 22, 15, 0.48);
  backdrop-filter: blur(18px);
}

.nav-group {
  display: flex;
  align-items: center;
  gap: clamp(3px, 0.35vw, 8px);
  font-size: clamp(13px, 0.78vw, 16px);
  font-weight: 300;
}

.nav-group-left {
  justify-self: start;
  justify-content: flex-start;
}

.nav-group-right {
  justify-self: end;
  justify-content: flex-end;
}

.nav-item {
  position: relative;
  padding: 17px 0;
}

.nav-link {
  display: inline-flex;
  position: relative;
  min-height: 34px;
  align-items: center;
  justify-content: flex-start;
  padding: 6px 13px;
  color: rgba(255, 255, 255, 0.72);
  letter-spacing: var(--tracking-tight-ui);
  text-align: left;
  transition: color 260ms ease, opacity 260ms ease;
}

.nav-link::before {
  position: absolute;
  right: 13px;
  bottom: -17px;
  left: 13px;
  height: 1px;
  background: rgba(255, 255, 255, 0.86);
  content: "";
  opacity: 0;
  transform: scaleX(0.64);
  transition: opacity 180ms ease, transform 180ms var(--ease-out);
}

.nav-link.is-active,
.nav-link:hover,
.nav-link:focus-visible {
  color: rgba(255, 255, 255, 0.94);
  outline: none;
}

.nav-link.is-active::before,
.nav-link:hover::before,
.nav-link:focus-visible::before {
  opacity: 1;
  transform: scaleX(1);
}

.brand {
  font-family: var(--brand-serif);
  font-size: clamp(32px, 2.1vw, 44px);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.05;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.38);
}

.pill-link {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 10px 14px 10px 28px;
  border-radius: 999px;
  background: var(--green-800);
  color: var(--white);
  font-weight: 400;
  line-height: 1;
  transition: transform 220ms var(--ease-out), background 220ms ease;
}

.pill-link:hover {
  background: #1b6845;
  transform: translateY(-1px);
}

.pill-icon {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--white);
  color: var(--green-900);
  font-size: 22px;
}

.nav .pill-link,
.hero-cta,
.mobile-demo {
  min-height: 42px;
  gap: 10px;
  padding: 8px 9px 8px 18px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(222, 226, 222, 0.18);
  backdrop-filter: blur(18px) saturate(125%);
  font-size: clamp(13px, 0.78vw, 16px);
}

.nav .pill-link:hover,
.hero-cta:hover,
.mobile-demo:hover {
  background: rgba(232, 235, 232, 0.26);
}

.nav .pill-icon,
.hero-cta .pill-icon,
.mobile-demo .pill-icon {
  width: 26px;
  height: 26px;
  background: rgba(255, 255, 255, 0.9);
  color: #24332b;
  font-size: 17px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  color: var(--white);
}

.menu-toggle span:not(.sr-only) {
  display: block;
  width: 18px;
  height: 1.5px;
  margin: 3px 0;
  background: currentColor;
}

.mobile-menu {
  display: none;
}

@keyframes headerReveal {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.home-page .site-header.is-scrolled .nav {
  background: rgba(4, 4, 5, 0.58);
  backdrop-filter: blur(18px) saturate(108%);
}

.home-page .site-header.is-product-prologue {
  color: #0a0b0b;
  text-shadow: none;
}

.home-page .site-header.is-product-prologue .nav {
  border-bottom: 1px solid rgba(10, 11, 11, 0.065);
  background: rgba(248, 248, 246, 0.56);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.34) inset;
  -webkit-backdrop-filter: blur(24px) saturate(118%);
  backdrop-filter: blur(24px) saturate(118%);
}

.home-page .site-header.is-product-prologue .nav-link {
  color: rgba(10, 11, 11, 0.58);
}

.home-page .site-header.is-product-prologue .nav-link:hover,
.home-page .site-header.is-product-prologue .nav-link:focus-visible,
.home-page .site-header.is-product-prologue .brand {
  color: #0a0b0b;
  text-shadow: none;
}

.home-page .site-header.is-product-prologue .nav-link::before {
  background: rgba(10, 11, 11, 0.72);
}

.home-page .site-header.is-product-prologue .nav .pill-link {
  border-color: rgba(10, 11, 11, 0.12);
  background: rgba(248, 248, 246, 0.32);
  color: #0a0b0b;
  -webkit-backdrop-filter: blur(16px) saturate(115%);
  backdrop-filter: blur(16px) saturate(115%);
}

.home-page .site-header.is-product-prologue .nav .pill-icon {
  background: #0a0b0b;
  color: #fff;
}

.home-page .site-header.is-product-prologue .menu-toggle {
  background: rgba(10, 11, 11, 0.06);
}

/* One authoritative mobile navigation shared by every route. */
@media (max-width: 900px) {
  .site-header {
    --mobile-header-bg: rgba(6, 10, 11, 0.76);
    --mobile-header-ink: #f6f7f7;
    --mobile-header-line: rgba(255, 255, 255, 0.11);
    color: var(--mobile-header-ink);
    text-shadow: none;
  }

  .site-header.is-light,
  .home-page .site-header.is-product-prologue {
    --mobile-header-bg: rgba(231, 231, 226, 0.78);
    --mobile-header-ink: #090a0a;
    --mobile-header-line: rgba(9, 10, 10, 0.1);
  }

  .site-header .nav,
  .product-page .site-header .nav,
  .home-page .site-header .nav {
    display: grid;
    min-height: 68px;
    grid-template-columns: 1fr auto;
    padding: 0 18px 0 20px;
    border-bottom: 1px solid var(--mobile-header-line);
    background: var(--mobile-header-bg);
    color: var(--mobile-header-ink);
    -webkit-backdrop-filter: blur(28px) saturate(125%);
    backdrop-filter: blur(28px) saturate(125%);
  }

  .site-header .nav-group { display: none; }

  .site-header .brand {
    justify-self: start;
    color: var(--mobile-header-ink);
    font-size: 32px;
    line-height: 1;
    text-shadow: none;
  }

  .site-header .menu-toggle,
  .product-page .site-header .menu-toggle {
    display: flex;
    width: 42px;
    height: 42px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    justify-self: end;
    gap: 4px;
    margin: 0;
    padding: 0;
    border: 1px solid var(--mobile-header-line);
    background: color-mix(in srgb, var(--mobile-header-ink) 8%, transparent);
    color: var(--mobile-header-ink);
  }

  .site-header .menu-toggle span:not(.sr-only) {
    display: block;
    width: 16px;
    height: 1.5px;
    flex: 0 0 1.5px;
    margin: 0;
    background: currentColor;
    transform-origin: center;
    transition: opacity 180ms ease, transform 260ms var(--ease-out);
  }

  .site-header .menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
  .site-header .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .site-header .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

  .site-header .mobile-menu,
  .product-page .site-header .mobile-menu {
    position: fixed;
    top: 68px;
    right: 12px;
    left: 12px;
    display: block;
    max-height: calc(100dvh - 80px);
    margin: 0;
    padding: 12px 20px 22px;
    overflow-y: auto;
    border: 1px solid var(--mobile-header-line);
    border-top: 0;
    border-radius: 0 0 24px 24px;
    background: var(--mobile-header-bg);
    color: var(--mobile-header-ink);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.22);
    -webkit-backdrop-filter: blur(30px) saturate(125%);
    backdrop-filter: blur(30px) saturate(125%);
  }

  .site-header .mobile-menu[hidden],
  .product-page .site-header .mobile-menu[hidden] { display: none; }

  .site-header .mobile-menu-section,
  .product-page .site-header .mobile-menu-section {
    border-bottom: 1px solid var(--mobile-header-line);
  }

  .site-header .mobile-menu-section a,
  .product-page .site-header .mobile-menu-section a {
    display: flex;
    min-height: 56px;
    align-items: center;
    padding: 0 2px;
    color: var(--mobile-header-ink);
    font-size: 17px;
    font-weight: 350;
  }

  .site-header .mobile-demo,
  .product-page .site-header .mobile-demo {
    width: fit-content;
    margin-top: 20px;
    border-color: var(--mobile-header-line);
    background: color-mix(in srgb, var(--mobile-header-ink) 9%, transparent);
    color: var(--mobile-header-ink);
  }

  body.has-mobile-menu-open { overflow: hidden; }
}