/* =============================================================
   navigation.css — Dark sticky header, dropdown, 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:#0B0E11;
  border-bottom:1px solid rgba(255,255,255,.08);
  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:#0B0E11;box-shadow:0 6px 24px rgba(0,0,0,.4);
}
.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}
/* Bigger logo in a framed dark badge — crest pops, border separates from header */
.brand__logo{height:88px;width:auto;display:block;
  background:linear-gradient(180deg,#1E242B 0%,#0B0E11 100%);
  border:1px solid rgba(255,255,255,.16);border-radius:16px;
  padding:8px 20px;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:70px;padding:6px 16px}
.site-footer .brand__logo{height:72px;background:linear-gradient(180deg,#1E242B 0%,#0B0E11 100%);
  border:1px solid rgba(255,255,255,.16);padding:8px 20px;border-radius:14px;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:rgba(244,246,248,.82);font-size:var(--fs-body-sm);
  font-weight:var(--fw-medium);padding-block:var(--space-8);
  transition:color var(--dur-fast)}
.nav__link:hover{color:#fff}
.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:#fff;font-weight:var(--fw-semibold)}

/* Dropdown group (Process + Sustainability) */
.nav__has-sub{position:relative}
.nav__sub-toggle{display:inline-flex;align-items:center;gap:6px;background:none;cursor:pointer}
.nav__chev{width:14px;height:14px;transition:transform var(--dur-base) var(--ease-out)}
.nav__has-sub:hover .nav__chev,.nav__has-sub.is-open .nav__chev{transform:rotate(180deg)}
.nav__has-sub.is-active > .nav__sub-toggle{color:#fff;font-weight:var(--fw-semibold)}
.nav__has-sub.is-active > .nav__sub-toggle::after{width:100%}
.nav__sub{position:absolute;top:calc(100% + 14px);left:50%;transform:translateX(-50%) translateY(8px);
  min-width:210px;background:#12181E;border:1px solid rgba(255,255,255,.12);
  border-radius:16px;padding:var(--space-8);box-shadow:var(--shadow-lg);list-style:none;
  opacity:0;visibility:hidden;transition:opacity var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out),visibility var(--dur-base);z-index:120}
.nav__has-sub:hover .nav__sub,.nav__has-sub.is-open .nav__sub{
  opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.nav__sub-link{display:block;padding:var(--space-12) var(--space-16);border-radius:10px;
  font-size:var(--fs-body-sm);color:rgba(244,246,248,.82)}
.nav__sub-link::after{display:none}
.nav__sub-link:hover{background:rgba(255,255,255,.07);color:#fff}
.nav__sub-link[aria-current="page"]{color:#fff;background:rgba(36,138,84,.22)}

.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:#fff;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:#fff;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 (dark) */
@media (max-width:991px){
  .nav__toggle{display:flex;position:relative;z-index:101}
  .nav__menu-wrap{
    position:fixed;inset:0;z-index:99;background:#0B0E11;
    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 rgba(255,255,255,.1)}
  .nav__link{display:block;width:100%;font-size:1.5rem;font-family:var(--font-display);
    font-weight:var(--fw-semibold);color:#fff;padding:var(--space-16) 0}
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{color:var(--color-steel-300)}
  /* Dropdown inline on mobile: show sublinks indented */
  .nav__sub-toggle{width:100%;justify-content:space-between}
  .nav__sub{position:static;opacity:1;visibility:visible;transform:none;min-width:0;
    background:none;border:none;box-shadow:none;padding:0 0 var(--space-8) var(--space-24)}
  .nav__sub-link{font-size:1.1rem;font-family:var(--font-display);color:rgba(244,246,248,.7);padding:var(--space-8) 0}
  .nav__sub-link:hover{background:none;color:#fff}
  .nav__sub-link[aria-current="page"]{background:none;color:var(--color-steel-300)}
  /* 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 > .nav__menu > 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 .nav__actions{transition-delay:.38s}
  .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}
}