/* Site header: brand lock-up, primary nav, transparent-over-hero state and the mobile menu. */
.site-header {
  position: sticky; top: 0; z-index: 50;
  margin-bottom: calc(-1 * var(--header-h)); /* let the hero sit underneath */
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s, box-shadow .3s;
}
.site-header.scrolled { border-color: var(--line); box-shadow: 0 4px 20px rgba(11,42,58,.05); }

/* Transparent header over the dark hero (top of page, menu closed) */
body:not(.nav-open) .site-header:not(.scrolled) {
  background: transparent; backdrop-filter: none; border-color: rgba(255,255,255,.08);
}
body:not(.nav-open) .site-header:not(.scrolled) .brand-text strong,
body:not(.nav-open) .site-header:not(.scrolled) .nav-link,
body:not(.nav-open) .site-header:not(.scrolled) .nav-sub-toggle { color: #fff; }
body:not(.nav-open) .site-header:not(.scrolled) .brand-text small { color: rgba(255,255,255,.62); }
body:not(.nav-open) .site-header:not(.scrolled) .nav-toggle span { background: #fff; }
.brand-text strong, .brand-text small, .nav-link, .nav-sub-toggle, .nav-toggle span { transition: color .3s, background .3s; }
.nav { height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-text strong {
  font-family: var(--font-body); font-size: 1.08rem; font-weight: 800;
  letter-spacing: .09em; text-transform: uppercase; color: var(--ink); white-space: nowrap;
}
.brand-text small {
  margin-top: 6px; font-size: .62rem; font-weight: 600; letter-spacing: .22em;
  text-transform: uppercase; color: var(--muted); white-space: nowrap;
}
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { white-space: nowrap; }
.nav-link { font-weight: 600; font-size: .95rem; color: var(--ink-2); position: relative; }
.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: -6px; height: 2px; width: 100%;
  background: var(--gold); transform: scaleX(0); transform-origin: left; transition: transform .25s;
}
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.nav-phone-only { display: none; }      /* shown only in the phone menu, where it's most useful */
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; transition: transform .25s, opacity .25s; }

/* "Products" dropdown (home page): the link scrolls to the section, the chevron opens the
   catalogue options. Opens on hover, keyboard focus, or a tap on the chevron (.is-open). */
.nav-item { position: relative; display: flex; align-items: center; gap: 2px; }
.nav-sub-toggle {
  display: grid; place-items: center; width: 24px; height: 24px; margin-right: -6px; padding: 0;
  border: 0; border-radius: 6px; background: none; color: var(--ink-2); cursor: pointer;
}
.nav-sub-toggle svg { transition: transform .2s; }
.nav-sub-toggle:hover { background: rgba(127,208,204,.18); }
.nav-menu {
  position: absolute; top: calc(100% + 14px); left: -18px; z-index: 60; width: 340px;
  padding: 10px; border-radius: 14px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity .18s, transform .18s, visibility 0s .18s;
}
.nav-menu::before { content: ""; position: absolute; left: 0; right: 0; top: -16px; height: 16px; } /* hover bridge */
.has-menu:hover .nav-menu, .has-menu:focus-within .nav-menu, .has-menu.is-open .nav-menu {
  opacity: 1; visibility: visible; transform: none; transition: opacity .18s, transform .18s;
}
.has-menu:hover .nav-sub-toggle svg, .has-menu.is-open .nav-sub-toggle svg { transform: rotate(180deg); }
.nav-menu-main { display: block; padding: 12px 14px; border-radius: 10px; background: var(--ink); color: #fff; }
.nav-menu-main strong { display: block; font-size: .95rem; }
.nav-menu-main strong span { color: var(--gold); display: inline-block; transition: transform .2s; }
.nav-menu-main small { display: block; margin-top: 3px; font-size: .78rem; color: rgba(255,255,255,.7); white-space: normal; }
.nav-menu-main:hover strong span { transform: translateX(3px); }
.nav-menu-label { margin: 12px 14px 4px; font-size: .68rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.nav-menu ul { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.nav-menu li a { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 8px; font-size: .84rem; font-weight: 600; color: var(--ink-2); white-space: normal; line-height: 1.25; }
.nav-menu li a:hover { background: var(--bg-tint); color: var(--teal); }
.nav-menu li i { flex: none; width: 8px; height: 8px; border-radius: 2px; background: var(--c); }

/* tighter spacing on narrower desktops, then the hamburger menu once the six items no longer fit beside the logo */
@media (max-width: 1180px) { .nav-links { gap: 22px; } }
@media (max-width: 1080px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; padding: 8px 16px 20px; border-bottom: 1px solid var(--line); box-shadow: var(--shadow-lg);
    transform: translateY(-8px); opacity: 0; pointer-events: none; transition: transform .25s, opacity .25s;
  }
  .nav-link { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .nav-phone-only { display: block; color: var(--teal); }
  .nav-link::after { display: none; }
  /* current section / page: gold bar and teal text instead of the desktop underline */
  .nav-link.active { color: var(--teal); box-shadow: inset 3px 0 0 var(--gold); padding-left: 14px; }
  .nav-links .btn { margin-top: 16px; }
  .nav-item { display: block; }
  .nav-item > .nav-link { display: block; border-bottom: 0; }
  .nav-sub-toggle, .nav-menu-label, .nav-menu ul, .nav-menu::before { display: none; }
  .nav-menu {
    position: static; width: auto; padding: 0; border: 0; border-bottom: 1px solid var(--line);
    border-radius: 0; box-shadow: none; background: none; opacity: 1; visibility: visible; transform: none;
  }
  .nav-menu-main { margin: 2px 0 10px 18px; padding: 10px 14px; }
  .nav-open .nav-links { transform: none; opacity: 1; pointer-events: auto; }
  .nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  .nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}
.brand-text small .estd { color: var(--gold-deep); margin-left: .7em; padding-left: .7em; border-left: 1px solid currentColor; }
body:not(.nav-open) .site-header:not(.scrolled) .brand-text small .estd,
.brand-light .brand-text small .estd { color: var(--gold); }
@media (max-width: 420px) {
  .brand { gap: 9px; }
  .brand-mark { width: 38px; height: 38px; }
  .brand-text strong { font-size: .9rem; letter-spacing: .06em; }
  .brand-text small { font-size: .54rem; letter-spacing: .16em; }
  .brand-text small .estd { display: block; margin: 4px 0 0; padding: 0; border: 0; }
}