/* ===========================================================================
   VKV Group — Header System (Module 3)
   Utility bar · sticky header · desktop mega menu · mobile off-canvas ·
   floating call/WhatsApp. Token-driven; builds on design-system + components.
   =========================================================================== */

/* ---- Utility bar ---- */
.util-bar { background: var(--navy-900); border-bottom: 1px solid var(--line); font-size: 0.82rem; }
.util-bar-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); min-height: 40px; }
.util-tag { color: var(--slate-400); display: flex; align-items: center; gap: 0.5rem; margin: 0; }
.util-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 3px var(--success-bg); }
.util-links { display: flex; gap: var(--space-5); }
.util-links a { color: var(--text-muted); transition: color var(--dur) var(--ease); }
.util-links a:hover { color: var(--accent-soft); }

/* ---- Header shell ---- */
.site-header { position: sticky; top: 0; z-index: var(--z-header);
  background: rgba(10, 22, 51, 0.72); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease); }
.site-header[data-scrolled] { background: rgba(7, 14, 35, 0.94); box-shadow: var(--shadow-1); }
.header-inner { display: flex; align-items: center; gap: var(--space-5); min-height: 72px; }
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }

/* ---- Desktop navigation ---- */
.primary-nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 2px; }
.nav-item { position: relative; }
.nav-link { display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.6rem 0.85rem; border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: 0.94rem; font-weight: 500; color: var(--text);
  background: transparent; border: 0; cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease); }
.nav-link:hover, .nav-link.active { color: var(--accent-soft); }
.nav-link.active { background: rgba(228, 199, 126, 0.08); }
.caret { width: 0; height: 0; border-left: 4px solid transparent; border-right: 4px solid transparent;
  border-top: 5px solid currentColor; opacity: 0.7; transition: transform var(--dur) var(--ease); }
.has-mega { position: static; }  /* so the mega panel anchors to .site-header, full width */
.has-mega[data-open] .caret, .has-mega:hover .caret { transform: rotate(180deg); }

/* ---- Mega menu ---- */
.mega { position: absolute; left: 0; right: 0; top: 100%; z-index: var(--z-overlay);
  padding-top: var(--space-3); opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur); }
.has-mega:hover .mega, .has-mega:focus-within .mega, .has-mega[data-open] .mega {
  opacity: 1; visibility: visible; transform: translateY(0); }
.mega-inner { background: var(--glass-bg); border: 1px solid var(--glass-border);
  backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur));
  border-radius: var(--radius-lg); box-shadow: var(--shadow-3); padding: var(--space-5); }
.mega-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); }
.mega-card { padding: var(--space-4); border-radius: var(--radius); border: 1px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease); }
.mega-card:hover { background: rgba(255, 255, 255, 0.03); border-color: var(--line); }
.mega-card-head { display: flex; gap: 0.75rem; align-items: flex-start; }
.mega-ico { flex: 0 0 auto; width: 2.25rem; height: 2.25rem; display: grid; place-content: center;
  border-radius: 10px; background: rgba(228,199,126,0.12); border: 1px solid var(--glass-border); color: var(--accent-soft); }
.mega-ico svg { width: 1.2rem; height: 1.2rem; }
.mega-card-title { display: block; font-family: var(--font-display); font-weight: 600; font-size: 0.98rem; color: var(--text); }
.mega-card-desc { display: block; font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; line-height: 1.45; }
.mega-links { margin-top: var(--space-3); display: grid; gap: 1px; }
.mega-links a { display: block; padding: 0.4rem 0.5rem; border-radius: var(--radius-sm);
  font-size: 0.86rem; color: var(--text-muted); transition: color var(--dur) var(--ease), background var(--dur) var(--ease); }
.mega-links a:hover { color: var(--accent-soft); background: rgba(228,199,126,0.08); }
.mega-promo { display: flex; flex-direction: column; justify-content: center; gap: 0.6rem;
  background: var(--grad-navy-deep); border: 1px solid var(--glass-border); }
.mega-promo-eyebrow { font-family: var(--font-display); font-weight: 600; color: var(--text); font-size: 0.95rem; }
.mega-promo-text { font-size: 0.82rem; color: var(--text-muted); }
.mega-promo .btn { align-self: flex-start; }

/* ---- Header CTAs ---- */
.header-cta { display: flex; align-items: center; gap: var(--space-2); flex: 0 0 auto; }
.header-call { border: 1px solid var(--line); }

/* ---- Hamburger ---- */
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; padding: 8px; }
.nav-toggle span { width: 26px; height: 2px; background: var(--text); border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Mobile off-canvas ---- */
.offcanvas { position: fixed; inset: 0; z-index: var(--z-modal); }
.offcanvas[hidden] { display: none; }
.offcanvas-backdrop { position: absolute; inset: 0; background: rgba(3, 8, 22, 0.6);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); animation: vkv-fade-in var(--dur) var(--ease-out); }
.offcanvas-panel { position: absolute; top: 0; right: 0; height: 100%; width: min(86vw, 380px);
  background: var(--navy-900); border-left: 1px solid var(--line); box-shadow: var(--shadow-3);
  display: flex; flex-direction: column; overflow-y: auto; padding: var(--space-5);
  animation: vkv-slide-in var(--dur) var(--ease-out); }
.offcanvas-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-4);
  padding-bottom: var(--space-4); border-bottom: 1px solid var(--line); }
.offcanvas-nav > ul { display: grid; gap: 2px; }
.offcanvas-nav a { display: block; padding: 0.8rem 0.6rem; border-radius: var(--radius-sm);
  font-family: var(--font-display); font-weight: 500; font-size: 1rem; color: var(--text); }
.offcanvas-nav a:hover, .offcanvas-nav a[aria-current="page"] { color: var(--accent-soft); background: rgba(228,199,126,0.08); }
.oc-trigger { width: 100%; padding: 0.8rem 0.6rem; font-size: 1rem; }
.oc-panel .accordion-panel-inner { padding: 0.25rem 0 0.5rem; }
.oc-pillar { padding: 0.35rem 0; }
.oc-pillar-link { font-weight: 600 !important; color: var(--text) !important; font-family: var(--font-display); padding: 0.5rem 0.6rem !important; }
.oc-sub { margin: 0 0 0.4rem; padding-left: 0.6rem; border-left: 1px solid var(--line); }
.oc-sub a { font-family: var(--font-body); font-weight: 400; font-size: 0.9rem; color: var(--text-muted); padding: 0.4rem 0.6rem; }
.offcanvas-cta { margin-top: auto; padding-top: var(--space-5); display: grid; gap: var(--space-3); }
.offcanvas-contact { display: flex; justify-content: space-between; gap: var(--space-3); font-size: 0.9rem; }
.offcanvas-contact a { color: var(--text-muted); padding: 0.5rem; }
.offcanvas-contact a:hover { color: var(--accent-soft); }

/* ---- Floating actions (global) ---- */
.floating-actions { position: fixed; z-index: var(--z-popup);
  right: max(var(--space-4), env(safe-area-inset-right));
  bottom: calc(var(--space-4) + env(safe-area-inset-bottom));
  display: flex; flex-direction: column; gap: var(--space-3); }
.fab { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.85rem;
  width: 3.25rem; height: 3.25rem; border-radius: var(--radius-pill); justify-content: center;
  box-shadow: var(--shadow-2); transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), width var(--dur) var(--ease); }
.fab:hover { transform: translateY(-2px); box-shadow: var(--shadow-3); }
.fab-whatsapp { background: #1FA855; color: #fff; }        /* brand-correct WhatsApp green */
.fab-call { background: var(--grad-gold); color: var(--navy-900); }
.fab-label { display: none; font-family: var(--font-display); font-weight: 600; font-size: 0.9rem; white-space: nowrap; }
/* Expand-on-hover label (pointer devices only) */
@media (hover: hover) and (min-width: 761px) {
  .fab:hover { width: auto; padding-inline: 1.1rem; }
  .fab:hover .fab-label { display: inline; }
}

/* ---- Responsive breakpoints ---- */
@media (max-width: 1100px) {
  .header-consult { display: none; }        /* keep bar uncluttered on tablet */
  .mega-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 980px) {
  .primary-nav, .header-cta { display: none; } /* switch to off-canvas */
  .nav-toggle { display: flex; margin-left: auto; }
}
@media (max-width: 640px) {
  .util-links { display: none; }
  .util-tag { font-size: 0.78rem; }
}
@media (max-width: 480px) {
  .floating-actions { flex-direction: row; right: auto; left: 50%; transform: translateX(-50%); }
  .fab { width: 3rem; height: 3rem; }
}

/* Extra keyframe for off-canvas slide */
@keyframes vkv-slide-in { from { transform: translateX(100%); } to { transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .offcanvas-panel, .offcanvas-backdrop, .mega { animation: none !important; }
}