/* ==========================================================
   NAVIGATION — Sticky Header + Mega-Menu + Mobile Drawer
   Clean White Precision Header showcasing the Vyokta Logo
   ========================================================== */

/* ---- Sticky Header ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 84px;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 14px rgba(1, 66, 39, 0.06);
  transition: height var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
}
.site-header.scrolled {
  height: 70px;
  background: #FFFFFF;
  box-shadow: 0 4px 20px rgba(1, 66, 39, 0.09);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  height: 100%;
}

/* ---- Logo ---- */
.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  text-decoration: none;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}
.site-logo:hover {
  opacity: 0.92;
}
.logo-mark {
  height: 48px;
  width: 48px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
  transition: height var(--transition-base), width var(--transition-base), transform var(--transition-base);
}
.site-header.scrolled .logo-mark {
  height: 40px;
  width: 40px;
}
.logo-text-wrap {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1;
  text-align: left;
}
.logo-brand-name {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  line-height: 1.05;
  transition: color var(--transition-fast);
}
.logo-brand-tagline {
  font-family: var(--font-body);
  font-size: 0.58rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-top: 3px;
  white-space: nowrap;
}

/* ---- Main Nav ---- */
.main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 0;
}
.nav-list > li { position: relative; }
.nav-list > li > a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0.6rem 1rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
  white-space: nowrap;
}
.nav-list > li > a:hover { color: var(--color-gold); }
.nav-list > li > a.active { color: var(--color-primary); font-weight: 700; }
.nav-list > li > a.active::after {
  content: '';
  position: absolute;
  bottom: 0px;
  left: 1rem;
  right: 1rem;
  height: 3px;
  background: var(--color-gold);
  border-radius: 2px;
}

/* Chevron icon for dropdowns */
.chevron {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  transition: transform var(--transition-fast);
}
.has-dropdown:hover .chevron { transform: rotate(180deg); }

/* ---- Simple Dropdown (Services) ---- */
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 230px;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  z-index: 200;
}
.has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown li a {
  display: block;
  padding: 0.65rem 1.25rem;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.dropdown li a:hover {
  color: var(--color-primary);
  background: var(--color-gold-light);
}

/* ---- Mega-Menu (Products) ---- */
.mega-menu-wrap {
  position: static;
}
.mega-panel {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  z-index: 150;
}
.mega-menu-wrap:hover .mega-panel,
.mega-panel:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.site-header.scrolled .mega-panel { top: var(--header-shrink); }

.mega-panel-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-inline: var(--container-pad);
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-10);
  align-items: start;
}
.mega-panel-label {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-3);
}
.mega-panel-intro {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.mega-panel-intro .mega-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--space-4);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
}
.mega-panel-intro .mega-cta svg {
  width: 14px; height: 14px;
  stroke: currentColor; fill: none;
  transition: transform var(--transition-fast);
}
.mega-panel-intro .mega-cta:hover svg { transform: translateX(4px); }

.mega-grid {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: var(--space-4);
}
.mega-card {
  display: block;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-2);
  overflow: hidden;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
  text-decoration: none;
}
.mega-card:hover {
  border-color: var(--color-gold);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.mega-card-img {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--color-bg-3);
}
.mega-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.mega-card:hover .mega-card-img img { transform: scale(1.08); }
.mega-card-info {
  padding: 0.75rem 1rem;
  background: #FFFFFF;
}
.mega-card-info h4 {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 2px;
}
.mega-card-info p {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

/* ---- Header Right ---- */
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}
.header-phone {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--color-text);
  transition: color var(--transition-fast);
}
.header-phone svg { width: 14px; height: 14px; stroke: var(--color-gold); fill: none; }
.header-phone:hover { color: var(--color-primary); }

/* Search toggle */
.search-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.search-toggle svg { width: 18px; height: 18px; stroke: currentColor; fill: none; }
.search-toggle:hover { color: var(--color-gold); border-color: var(--color-gold); }

/* Search overlay */
.search-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(1, 40, 24, 0.95);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  padding-top: var(--space-24);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}
.search-overlay.is-open {
  opacity: 1;
  visibility: visible;
}
.search-overlay-inner {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 var(--container-pad);
}
.search-overlay-inner form {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}
.search-input {
  flex: 1;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  font-size: var(--fs-lg);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-fast);
}
.search-input::placeholder { color: var(--color-text-muted); }
.search-input:focus { border-color: var(--color-gold); }
.search-close {
  color: #FFFFFF;
  font-size: var(--fs-lg);
  transition: color var(--transition-fast);
  padding: 0.5rem;
}
.search-close:hover { color: var(--color-gold); }

/* ---- Mobile Toggle ---- */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  margin-left: auto;
}
.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}
.mobile-toggle.is-open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-toggle.is-open span:nth-child(2) { opacity: 0; }
.mobile-toggle.is-open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ---- Mobile Drawer ---- */
.mobile-drawer {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100dvh;
  background: #FFFFFF;
  z-index: 999;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  padding-top: var(--header-height);
}
.mobile-drawer.is-open { transform: translateX(0); }

.mobile-nav-list { padding: var(--space-4) var(--space-4) var(--space-8); }
.mobile-nav-list li { border-bottom: 1px solid var(--color-border); }
.mobile-nav-list > li > a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0.5rem;
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--color-primary);
}
.mobile-nav-list > li > a .chevron { transition: transform var(--transition-base); }
.mobile-nav-list > li.is-expanded > a .chevron { transform: rotate(180deg); }

.mobile-sub-list {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}
.mobile-nav-list > li.is-expanded .mobile-sub-list { max-height: 400px; }
.mobile-sub-list a {
  display: block;
  padding: 0.7rem 1rem;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}
.mobile-sub-list a:hover { color: var(--color-gold); }

.mobile-footer {
  padding: var(--space-6) var(--space-5);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.mobile-footer .btn { justify-content: center; }
.mobile-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text);
  font-size: var(--fs-sm);
  font-weight: 600;
}
.mobile-phone svg { stroke: var(--color-gold); fill: none; width: 16px; height: 16px; }

/* ---- Page-offset for sticky header ---- */
.main-content { padding-top: var(--header-height); }

/* ---- Responsive ---- */
@media (max-width: 1100px) {
  .main-nav { display: none; }
  .header-phone { display: none; }
  .mobile-toggle { display: flex; }
  .header-right .btn { display: none; }
}
@media (min-width: 1101px) {
  .mobile-drawer { display: none !important; }
}