/* ============================================
   CET ENVIRO — Navigation
   Pure white, Qualcomm style
   ============================================ */
.site-nav{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--border);height:var(--nav-height);transition:box-shadow var(--dur) var(--ease);}
.site-nav.scrolled{box-shadow:0 2px 20px rgba(0,0,0,0.08);}
.nav-inner{display:flex;align-items:center;height:100%;gap:0;}

/* Logo */
.nav-logo{display:flex;align-items:center;text-decoration:none;flex-shrink:0;margin-right:48px;}
.nav-logo-img{height:60px;width:auto;display:block;}

/* Links */
.nav-links{display:flex;align-items:center;gap:2px;flex:1;align-self:stretch;}
.nav-item{position:relative;align-self:stretch;display:flex;align-items:center;}
.nav-link{display:flex;align-items:center;gap:4px;font-size:15px;font-weight:900;color:#000;padding:8px 13px;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--dur);white-space:nowrap;text-decoration:none;border:none;background:none;font-family:var(--font);}
.nav-link:hover,.nav-item:hover>.nav-link{background:var(--off-white);color:#000;}
.nav-link .chev{font-size:10px;color:var(--text-muted);transition:transform var(--dur) var(--ease);display:inline-flex;}
.nav-item:hover>.nav-link .chev{transform:rotate(180deg);}

/* Mega dropdown — flat sheet flush with header's bottom line */
.mega-dropdown{position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--border);border-top:none;padding:22px;width:280px;box-shadow:0 16px 28px rgba(0,0,0,0.07);display:flex;gap:20px;opacity:0;visibility:hidden;transform:translateY(-4px);transition:all var(--dur) var(--ease);pointer-events:none;}
.mega-dropdown.cols-2{width:540px;}
.nav-item:hover .mega-dropdown{opacity:1;visibility:visible;transform:translateY(0);pointer-events:all;}
.mega-col{flex:1;}
.mega-col-title{font-size:12px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.1em;margin-bottom:8px;padding-bottom:8px;border-bottom:1px solid var(--border);}
.mega-item{display:flex;align-items:flex-start;padding:8px;margin-bottom:2px;cursor:pointer;text-decoration:none;transition:background var(--dur);}
.mega-item:hover{background:var(--leaf-pale);}
.mega-item-name{display:block;font-size:14px;font-weight:700;color:var(--ink);margin-bottom:2px;}
.mega-item-desc{display:block;font-size:13px;color:var(--text-muted);line-height:1.4;}
.mega-footer{margin-top:12px;padding-top:10px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;}
.mega-footer-link{font-size:13px;font-weight:600;color:var(--forest);text-decoration:none;}
.mega-footer-link:hover{color:var(--leaf);}

/* Right actions */
.nav-actions{display:flex;align-items:center;gap:16px;margin-left:auto;flex-shrink:0;}
.nav-actions .btn-primary{font-weight:900;background:var(--sky);border-color:var(--sky);}
.nav-actions .btn-primary:hover{background:var(--sky-mid);border-color:var(--sky-mid);}
.nav-search-btn{background:none;border:none;cursor:pointer;color:#000;font-size:16px;display:flex;align-items:center;padding:4px;font-family:var(--font);}
.nav-search-btn:hover{color:var(--forest);}
.nav-divider{width:1px;height:22px;background:var(--border);}
.nav-social-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;border:1px solid var(--border);color:var(--text-mid);font-size:14px;transition:all var(--dur);}
.nav-social-btn:hover{color:#fff;background:var(--sky);border-color:var(--sky);}

/* Hamburger */
.nav-hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;margin-left:auto;background:none;border:none;}
.nav-hamburger span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:all var(--dur) var(--ease);}

/* Mobile nav */
.nav-mobile{display:none;position:fixed;inset:0;top:var(--nav-height);background:#fff;z-index:99;overflow-y:auto;padding:var(--space-lg) var(--gutter);border-top:1px solid var(--border);}
.nav-mobile.open{display:block;}
.nav-mobile-item{display:block;font-size:var(--text-md);font-weight:600;color:var(--ink);padding:14px 0;border-bottom:1px solid var(--border);text-decoration:none;}
.nav-mobile-sub a{display:block;font-size:var(--text-sm);color:var(--text-mid);padding:8px 16px;text-decoration:none;}

@media(max-width:768px){
  .nav-links,.nav-actions .btn,.nav-search-btn,.nav-divider,.nav-social-btn{display:none;}
  .nav-hamburger{display:flex;}
  .nav-inner{justify-content:space-between;}
}