/* =============================================================
   navigation.css — White sticky header & mobile drawer
   ============================================================= */
/* NOTE: no backdrop-filter here — a filtered ancestor would trap the
   position:fixed mobile drawer inside the header box. Solid bg instead. */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:100;height:var(--nav-h);
  display:flex;align-items:center;background:#fff;
  border-bottom:1px solid var(--border-subtle);
  transition:height var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
}
.site-header.is-scrolled{
  height:var(--nav-h-condensed);background:#fff;box-shadow:var(--shadow-sm);
}
.nav{display:flex;align-items:center;justify-content:space-between;width:100%;
  max-width:var(--container-max);margin-inline:auto;padding-inline:var(--container-pad)}

.brand{display:flex;align-items:center;gap:var(--space-12);flex:0 0 auto}
/* Dark badge makes the colourful crest pop on the white header */
.brand__logo{height:74px;width:auto;display:block;
  background:linear-gradient(180deg,#1E242B 0%,#0B0E11 100%);
  border:1px solid rgba(255,255,255,.14);border-radius:14px;
  padding:8px 18px;box-shadow:var(--shadow-md);
  transition:height var(--dur-base) var(--ease-out),padding var(--dur-base) var(--ease-out)}
.is-scrolled .brand__logo{height:62px;padding:6px 15px}
/* Footer already sits on a dark surface */
.site-footer .brand__logo{height:66px;background:linear-gradient(180deg,#1E242B 0%,#0B0E11 100%);
  border:1px solid rgba(255,255,255,.14);padding:8px 18px;border-radius:12px;box-shadow:var(--shadow-md)}

/* Desktop: menu + CTA sit inline on one row */
.nav__menu-wrap{display:flex;align-items:center;gap:var(--space-32)}

.nav__menu{display:flex;align-items:center;gap:var(--space-24);list-style:none}
.nav__link{position:relative;color:var(--color-ink-700);font-size:var(--fs-body-sm);
  font-weight:var(--fw-medium);padding-block:var(--space-8)}
.nav__link:hover{color:var(--text-brand)}
.nav__link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent);transition:width var(--dur-base) var(--ease-out)}
.nav__link:hover::after,.nav__link[aria-current="page"]::after{width:100%}
.nav__link[aria-current="page"]{color:var(--text-brand);font-weight:var(--fw-semibold)}

.nav__actions{display:flex;align-items:center;gap:var(--space-16)}

.nav__toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border-radius:var(--radius-sm)}
.nav__toggle-bar{display:block;width:22px;height:2px;background:var(--color-ink-800);position:relative;transition:background var(--dur-fast)}
.nav__toggle-bar::before,.nav__toggle-bar::after{content:"";position:absolute;left:0;width:22px;height:2px;
  background:var(--color-ink-800);transition:transform var(--dur-base) var(--ease-out),top var(--dur-base) var(--ease-out)}
.nav__toggle-bar::before{top:-7px}.nav__toggle-bar::after{top:7px}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar{background:transparent}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar::before{top:0;transform:rotate(45deg)}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar::after{top:0;transform:rotate(-45deg)}

/* Mobile drawer (white) */
@media (max-width:991px){
  .nav__toggle{display:flex;position:relative;z-index:101}
  .nav__menu-wrap{
    position:fixed;inset:0;z-index:99;background:var(--bg-surface);
    display:flex;flex-direction:column;justify-content:flex-start;
    gap:var(--space-8);padding:calc(var(--nav-h) + var(--space-24)) var(--container-pad) var(--space-48);
    transform:translateX(100%);transition:transform var(--dur-base) var(--ease-out);
    visibility:hidden;overflow-y:auto;
  }
  .nav__menu-wrap.is-open{transform:translateX(0);visibility:visible}
  .nav__menu{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav__menu li{border-bottom:1px solid var(--border-subtle)}
  .nav__link{display:block;width:100%;font-size:1.5rem;font-family:var(--font-display);
    font-weight:var(--fw-semibold);color:var(--text-primary);padding:var(--space-16) 0}
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{color:var(--text-brand)}
  /* Staggered entrance */
  .nav__menu li,.nav__menu-wrap .nav__actions{opacity:0;transform:translateX(24px);
    transition:opacity var(--dur-base) var(--ease-out),transform var(--dur-base) var(--ease-out)}
  .nav__menu-wrap.is-open li,.nav__menu-wrap.is-open .nav__actions{opacity:1;transform:none}
  .nav__menu-wrap.is-open li:nth-child(1){transition-delay:.05s}
  .nav__menu-wrap.is-open li:nth-child(2){transition-delay:.10s}
  .nav__menu-wrap.is-open li:nth-child(3){transition-delay:.15s}
  .nav__menu-wrap.is-open li:nth-child(4){transition-delay:.20s}
  .nav__menu-wrap.is-open li:nth-child(5){transition-delay:.25s}
  .nav__menu-wrap.is-open li:nth-child(6){transition-delay:.30s}
  .nav__menu-wrap.is-open li:nth-child(7){transition-delay:.35s}
  .nav__menu-wrap.is-open .nav__actions{transition-delay:.42s}
  .nav__menu-wrap .nav__actions{margin-top:var(--space-32);width:100%}
  .nav__menu-wrap .nav__actions .btn{width:100%;min-height:54px;font-size:var(--fs-body)}
  body.nav-open{overflow:hidden}
}