/* HEADER */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 2000;
  height: var(--header-height);
  background-color: transparent;
  transition: top var(--transition-base), background-color var(--transition-base), box-shadow var(--transition-base);
}
.site-header.scrolled {
  background-color: var(--color-bg);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

/* Logo */
.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  flex-shrink: 0;
}
.header-logo img {
  height: 36px;
  width: auto;
}
.header-logo-text {
  font-size: 15px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-dark);
  border-left: 2px solid var(--color-border);
  padding-left: var(--space-sm);
  line-height: 1.2;
}

/* Nav */
.header-nav {
  display: flex;
  align-items: center;
}
.nav-list {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
  margin: 0; padding: 0;
}
.nav-link {
  font-size: 15px;
  font-weight: var(--font-weight-medium);
  color: var(--color-body);
  padding: var(--space-sm) 0;
  position: relative;
  text-decoration: none;
  transition: color var(--transition-fast);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}
.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

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

/* Language dropdown */
.lang-switcher {
  position: relative;
  display: flex;
  align-items: center;
}
.lang-current {
  display: flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 13px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-heading);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-family);
}
.lang-current:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.lang-current svg {
  transition: transform var(--transition-fast);
}
.lang-switcher.open .lang-current svg {
  transform: rotate(180deg);
}
.lang-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 140px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,.1);
  z-index: 3000;
  padding: 4px 0;
  flex-direction: column;
}
.lang-switcher.open .lang-dropdown {
  display: flex;
}
.lang-dropdown-item {
  display: block;
  padding: 8px 16px;
  font-size: 13px;
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  font-weight: var(--font-weight-regular);
}
.lang-dropdown-item:hover {
  background: var(--color-bg-muted);
  color: var(--color-primary);
}
.lang-dropdown-active {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* Header CTA button */
.header-cta {
  font-size: 14px !important;
  padding: 10px 20px !important;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-sm);
  background: none;
  border: none;
  z-index: 2001;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background-color: var(--color-heading);
  transition: transform var(--transition-base), opacity var(--transition-fast);
  border-radius: 1px;
}
.hamburger.open span:first-child { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:last-child { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
.mobile-nav {
  position: fixed;
  top: var(--header-height);
  left: 0; right: 0; bottom: 0;
  background: var(--color-bg);
  z-index: 1999;
  padding: 0;
  overflow-y: auto;
  display: none;
  flex-direction: column;
}
.mobile-nav.open {
  display: flex;
}

/* Backdrop */
.mobile-nav-backdrop {
  display: none;
}

/* Nav links */
.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-lg) var(--content-padding);
}
.mobile-nav-links a {
  font-size: 18px;
  font-weight: var(--font-weight-medium);
  color: var(--color-heading);
  text-decoration: none;
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0 var(--space-md);
  border-radius: 10px;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.mobile-nav-links a:hover {
  background: var(--color-bg-muted);
  color: var(--color-primary);
}
.mobile-nav-links a.active {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  background: var(--color-bg-muted);
}

/* Actions section */
.mobile-nav-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-xl) var(--content-padding);
  margin-top: auto;
}
.mobile-nav-actions .lang-switcher {
  width: 100%;
  position: relative;
}
.mobile-nav-actions .lang-current {
  width: 100%;
  justify-content: center;
  padding: 10px 16px;
  font-size: 14px;
}
.mobile-nav-actions .lang-dropdown {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  right: 0;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}
.mobile-nav-cta {
  display: flex !important;
  justify-content: center;
  width: 100%;
  text-align: center;
  padding: 14px 20px !important;
  font-size: 16px !important;
}

@media (max-width: 1279px) {
  .header-nav { display: none; }
  .hamburger { display: flex; }
  .header-cta { display: none; }
}