/* ================================
   Site Header & Navigation
   ================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-bg-white);
  box-shadow: var(--shadow-sm);
}

/* Top bar */
.header__topbar {
  background-color: var(--color-primary);
  color: var(--color-bg-white);
  font-size: var(--font-size-sm);
  padding: var(--space-xs) 0;
}

.header__topbar .container {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-lg);
}

.header__topbar a {
  color: var(--color-bg-white);
  opacity: 0.9;
  transition: opacity var(--transition-fast);
}

.header__topbar a:hover {
  opacity: 1;
  color: var(--color-accent);
}

.header__phone {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: var(--font-weight-medium);
}

.header__email {
  display: none;
}

@media (min-width: 768px) {
  .header__email {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
  }
}

/* Main header */
.header__main {
  padding: var(--space-md) 0;
}

.header__main .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
}

.header__logo img {
  height: 45px;
  width: auto;
}

@media (min-width: 768px) {
  .header__logo img {
    height: 55px;
  }
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (min-width: 1024px) {
  .nav__toggle {
    display: none;
  }
}

/* Navigation menu */
.nav__menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-bg-white);
  box-shadow: var(--shadow-lg);
  padding: var(--space-md) 0;
  max-height: 80vh;
  overflow-y: auto;
}

.nav__menu--open {
  display: block;
}

@media (min-width: 1024px) {
  .nav__menu {
    display: flex;
    position: static;
    box-shadow: none;
    padding: 0;
    overflow: visible;
    gap: 0;
    align-items: center;
    max-height: none;
  }
}

.nav__list {
  display: flex;
  flex-direction: column;
}

@media (min-width: 1024px) {
  .nav__list {
    flex-direction: row;
    align-items: center;
    gap: 0;
  }
}

.nav__item {
  position: relative;
}

.nav__link {
  display: block;
  padding: 0.75rem var(--container-padding);
  color: var(--color-text-dark);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-accent);
}

@media (min-width: 1024px) {
  .nav__link {
    padding: 0.5rem 0.75rem;
  }
}

/* Dropdown arrow */
.nav__link--dropdown {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__link--dropdown::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--transition-fast);
  margin-top: -2px;
}

.nav__dropdown--open > .nav__link--dropdown::after {
  transform: rotate(-135deg);
  margin-top: 2px;
}

/* Dropdown menu */
.nav__submenu {
  display: none;
  background-color: var(--color-bg-light);
}

.nav__dropdown--open > .nav__submenu {
  display: block;
}

@media (min-width: 1024px) {
  .nav__submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background-color: var(--color-bg-white);
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    padding: var(--space-sm) 0;
    z-index: 100;
  }

  .nav__dropdown:hover > .nav__submenu {
    display: block;
  }

  .nav__dropdown--open > .nav__link--dropdown::after {
    transform: rotate(45deg);
    margin-top: -2px;
  }
}

.nav__submenu .nav__link {
  padding: 0.5rem 2rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
}

@media (min-width: 1024px) {
  .nav__submenu .nav__link {
    padding: 0.5rem 1rem;
  }

  .nav__submenu .nav__link:hover {
    background-color: var(--color-bg-light);
  }
}

/* CTA button in nav */
.nav__cta {
  margin: var(--space-md) var(--container-padding);
}

@media (min-width: 1024px) {
  .nav__cta {
    margin: 0 0 0 var(--space-md);
  }
}

/* Body overlay when nav is open */
body.nav-open {
  overflow: hidden;
}

@media (min-width: 1024px) {
  body.nav-open {
    overflow: auto;
  }
}