/* ============================================================
   AIRAVATAM — Layout Styles
   Header, Mega Navigation, Mobile Nav, Footer
   ============================================================ */

/* ============================================================
   HEADER
   ============================================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: var(--z-header);
  transition: background var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              backdrop-filter var(--duration-base) var(--ease-out);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* Logo */
.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.header-logo img,
.header-logo-img {
  height: 44px;
  width: auto;
}

.header-logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-dark);
  letter-spacing: var(--tracking-tight);
  line-height: 1.1;
}

.header-logo-text span {
  display: block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
}

/* Header phone */
.header-phone {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-dark);
  text-decoration: none;
  margin-right: var(--space-4);
  transition: var(--transition-fast);
}

.header-phone:hover {
  color: var(--color-primary);
}

.header-phone svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
}

/* Header actions group */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ============================================================
   DESKTOP NAVIGATION
   ============================================================ */

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  height: 100%;
}

.nav-item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-body);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: rgba(0, 127, 255, 0.06);
}

.nav-link .chevron {
  width: 12px;
  height: 12px;
  transition: transform var(--duration-fast) var(--ease-out);
  opacity: 0.5;
}

.nav-item:hover .nav-link .chevron,
.nav-item.open .nav-link .chevron {
  transform: rotate(180deg);
  opacity: 1;
}

/* ============================================================
   MEGA MENU
   ============================================================ */

.mega-menu {
  position: absolute;
  top: calc(100% - 4px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 560px;
  background: white;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border-light);
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out),
              visibility var(--duration-base);
  z-index: var(--z-popup);
}

.mega-menu::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 0;
  right: 0;
  height: 12px;
  background: transparent;
}

.nav-item:hover .mega-menu,
.nav-item.open .mega-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}

/* Mega menu grid */
.mega-menu-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}

.mega-menu-grid.cols-3 {
  grid-template-columns: repeat(3, 1fr);
  min-width: 720px;
}

/* Mega menu item */
.mega-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: var(--transition-fast);
}

.mega-item:hover {
  background: rgba(0, 127, 255, 0.06);
}

.mega-item-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(0, 127, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  flex-shrink: 0;
  color: var(--color-primary);
  transition: var(--transition-fast);
}

.mega-item:hover .mega-item-icon {
  background: var(--color-primary);
  color: white;
}

.mega-item.accent .mega-item-icon {
  background: rgba(255, 107, 0, 0.08);
  color: var(--color-accent);
}

.mega-item.accent:hover .mega-item-icon {
  background: var(--color-accent);
  color: white;
}

.mega-item-text {
  flex: 1;
}

.mega-item-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-dark);
  margin-bottom: 2px;
  line-height: 1.3;
}

.mega-item-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Mega menu footer */
.mega-menu-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mega-menu-footer a {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
}

.mega-menu-footer a:hover {
  text-decoration: underline;
}

/* ============================================================
   MOBILE NAV TOGGLE
   ============================================================ */

.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  border-radius: var(--radius-md);
  cursor: pointer;
  background: transparent;
  border: none;
  z-index: calc(var(--z-modal) + 1);
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text-dark);
  border-radius: 2px;
  transition: var(--transition-base);
  transform-origin: center;
}

.mobile-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle.open span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   MOBILE NAV OVERLAY
   ============================================================ */

.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-base) var(--ease-out),
              visibility var(--duration-base);
}

.mobile-nav-overlay.open {
  opacity: 1;
  visibility: visible;
}

/* ============================================================
   MOBILE NAV PANEL
   ============================================================ */

.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 380px;
  height: 100vh;
  height: 100dvh;
  background: white;
  z-index: var(--z-modal);
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-out);
  overflow-y: auto;
  padding: var(--space-20) var(--space-6) var(--space-8);
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-nav-item {}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  color: var(--color-text-dark);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
}

.mobile-nav-link:hover {
  background: rgba(0, 127, 255, 0.06);
  color: var(--color-primary);
}

.mobile-nav-link .chevron {
  width: 16px;
  height: 16px;
  transition: transform var(--duration-fast) var(--ease-out);
  opacity: 0.4;
}

.mobile-nav-item.open .mobile-nav-link .chevron {
  transform: rotate(180deg);
  opacity: 1;
  color: var(--color-primary);
}

/* Mobile sub-menu */
.mobile-sub-menu {
  display: none;
  flex-direction: column;
  gap: 0;
  padding-left: var(--space-4);
  margin-top: var(--space-1);
}

.mobile-nav-item.open .mobile-sub-menu {
  display: flex;
}

.mobile-sub-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-label);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.mobile-sub-link:hover {
  color: var(--color-primary);
  background: rgba(0, 127, 255, 0.04);
}

.mobile-nav-cta {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-text-secondary);
  padding-top: var(--space-16);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-12);
}

/* Footer brand column */
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer-brand img,
.footer-logo-img {
  height: 40px;
  width: auto;
  filter: brightness(0) invert(1);
}

.footer-brand-logo {
  display: inline-block;
  line-height: 0;
}

.footer-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 280px;
}

.footer-social {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

/* Footer link columns */
.footer-col-title {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: white;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-link:hover {
  color: white;
  transform: translateX(4px);
}

/* Footer bottom bar */
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-block: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copyright {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.footer-bottom-links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-bottom-links a:hover {
  color: white;
}

/* ============================================================
   RESPONSIVE — TABLET & MOBILE
   ============================================================ */

@media (max-width: 1024px) {
  .main-nav { display: none; }
  .mobile-toggle { display: flex; }
  .header-phone { display: none; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8) var(--space-6);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .site-header {
    height: var(--header-height-sm);
  }

  .header-logo img,
  .header-logo-img {
    height: 34px;
  }

  .header-logo-text {
    font-size: var(--text-md);
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ============================================================
   PAGE BODY OFFSET (for fixed header)
   ============================================================ */

.page-body {
  padding-top: var(--header-height);
}

@media (max-width: 640px) {
  .page-body {
    padding-top: var(--header-height-sm);
  }
}