/* ============================================
   SUNDAS FOUNDATION — Header & Navigation
   ============================================ */

/* ---- Top Bar ---- */
.top-bar {
  background: var(--color-dark);
  padding: 8px 0;
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.7);
}

.top-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.top-bar__location {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.top-bar__location svg {
  width: 14px;
  height: 14px;
  fill: var(--color-primary);
}

.top-bar__social {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.top-bar__social a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
}

.top-bar__social a:hover {
  color: var(--color-primary);
}

.top-bar__social svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* ---- Main Header ---- */
.main-header {
  background: var(--color-white);
  padding: 15px 0;
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: var(--z-sticky);
}

.main-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.main-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.main-header__logo img {
  height: 60px;
  width: auto;
}

.main-header__org-name {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--color-dark);
  letter-spacing: 0.5px;
  line-height: 1.2;
}

.main-header__phone {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-dark);
  font-weight: var(--fw-semi);
  font-size: var(--fs-sm);
}

.main-header__phone svg {
  width: 18px;
  height: 18px;
  fill: var(--color-primary);
}

.main-header__cta .btn {
  font-size: var(--fs-xs);
}

/* ---- Navigation Bar ---- */
.nav-bar {
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  position: relative;
  z-index: var(--z-sticky);
}

.nav-bar__inner {
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-menu {
  display: flex;
  align-items: center;
}

.nav-menu__item {
  position: relative;
}

.nav-menu__link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 16px 18px;
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semi);
  color: var(--color-dark);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav-menu__link:hover,
.nav-menu__link--active {
  color: var(--color-primary);
}

.nav-menu__link .arrow {
  width: 10px;
  height: 10px;
  fill: currentColor;
  transition: transform var(--transition-fast);
}

.nav-menu__item:hover .arrow {
  transform: rotate(180deg);
}

/* ---- Dropdown ---- */
.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--color-white);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
  padding: var(--space-sm) 0;
}

.nav-menu__item:hover > .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown__link {
  display: block;
  padding: 10px 20px;
  font-size: var(--fs-sm);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.dropdown__link:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding-left: 24px;
}

/* ---- Mobile Hamburger ---- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  z-index: calc(var(--z-overlay) + 1);
}

.hamburger__line {
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.hamburger--active .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger--active .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger--active .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- Mobile Menu Overlay ---- */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-white);
  z-index: var(--z-overlay);
  overflow-y: auto;
  padding: 80px var(--container-pad) var(--space-xl);
  transform: translateX(-100%);
  transition: transform var(--transition-base);
}

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

.mobile-nav__menu {
  display: flex;
  flex-direction: column;
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  font-family: var(--font-heading);
  font-size: var(--fs-md);
  font-weight: var(--fw-semi);
  color: var(--color-dark);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav__link:hover {
  color: var(--color-primary);
}

.mobile-dropdown {
  display: none;
  padding-left: var(--space-lg);
}

.mobile-dropdown--open {
  display: block;
}

.mobile-dropdown__link {
  display: block;
  padding: 10px 0;
  font-size: var(--fs-sm);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.mobile-dropdown__link:hover {
  color: var(--color-primary);
}

/* ---- Sticky Header ---- */
.site-header--sticky {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  animation: slideDown 0.3s ease forwards;
}

.site-header--sticky .top-bar {
  display: none;
}

.site-header--sticky .main-header {
  padding: 8px 0;
  box-shadow: none;
}

.site-header--sticky .main-header__logo img {
  height: 44px;
}

.site-header--sticky .main-header__org-name {
  font-size: var(--fs-md);
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}

/* Placeholder for sticky offset */
.header-placeholder {
  display: none;
}

.header-placeholder--visible {
  display: block;
}