/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  z-index: 1001;
  font-weight: 600;
  text-decoration: none;
  font-family: 'Inter', var(--font-sans);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: 2px solid var(--color-text-primary);
  outline-offset: 2px;
}

/* Header Layout */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 25, 47, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  font-family: 'Inter', var(--font-sans);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-text-primary);
  font-weight: 700;
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
  z-index: 101;
}

.brand__name {
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
  position: relative;
  padding: var(--space-2) 0;
}

.nav-list a:hover,
.nav-list a:focus {
  color: var(--color-accent-primary);
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent-primary);
  transition: width var(--transition-base);
}

.nav-list a:hover::after,
.nav-list a:focus::after {
  width: 100%;
}

.nav-cta {
  margin-left: var(--space-4);
}

 .nav-list .nav-cta a {
  color: var(--color-bg-primary);
  padding: var(--space-2);
}

/* Language Switcher */
.language-switcher {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: var(--space-8);
  padding-left: var(--space-8);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  text-decoration: none;
  transition: color var(--transition-fast);
  font-family: 'Inter', var(--font-sans);
  position: relative;
}

.lang-btn:hover,
.lang-btn:focus {
  color: var(--color-accent-primary);
  outline: none;
}

.lang-btn--active {
  color: var(--color-accent-primary);
  cursor: default;
}

.lang-btn--active:hover {
  color: var(--color-accent-primary);
}

.lang-separator {
  color: rgba(255, 255, 255, 0.2);
  font-size: var(--text-sm);
}

.lang-btn__text {
  display: inline-block;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 101;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: transform var(--transition-base), background-color var(--transition-base);
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before {
  top: -7px;
}

.hamburger::after {
  top: 7px;
}

/* Mobile Styles */
@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }
  
  .primary-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 320px;
    background-color: var(--color-bg-secondary);
    border-left: 1px solid var(--color-border);
    flex-direction: column;
    justify-content: flex-start;
    padding-top: 100px;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-xl);
    overflow-y: auto;
  }
  
  .primary-nav.is-open {
    transform: translateX(0);
    height: 100vh;
  }
  
  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-6);
    width: 100%;
    padding: var(--space-6);
  }
  
  .nav-cta {
    margin-left: 0;
    margin-top: var(--space-4);
    width: 100%;
  }
  
  .nav-cta .btn {
    width: 100%;
    justify-content: center;
  }

  /* Mobile Language Switcher */
  .language-switcher {
    margin-left: 0;
    padding-left: 0;
    padding: var(--space-6);
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    gap: var(--space-3);
    justify-content: center;
  }

  .lang-btn {
    padding: var(--space-2) var(--space-4);
  }
  
  /* Hamburger Animation */
  .mobile-toggle.is-active .hamburger {
    background-color: transparent;
  }
  
  .mobile-toggle.is-active .hamburger::before {
    transform: rotate(45deg);
    top: 0;
  }
  
  .mobile-toggle.is-active .hamburger::after {
    transform: rotate(-45deg);
    top: 0;
  }
}

/* Focus States */
.mobile-toggle:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}