/* Header Layout */
.site-header {
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

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

/* Logo */
.logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--color-text);
  font-family: 'Poppins', var(--font-sans);
  line-height: 1.2;
}

.logo-text {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary-600);
  letter-spacing: -0.02em;
}

.logo-subtext {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Navigation */
.main-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

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

.nav-list a {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--duration-base) var(--ease-in-out);
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary-500);
  transition: width var(--duration-base) var(--ease-in-out);
}

.nav-list a:hover {
  color: var(--color-primary-600);
}

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

.nav-list a:focus-visible {
  outline: 2px solid var(--color-primary-300);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

/* CTA Button */
.header-cta {
  margin-left: var(--space-6);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  z-index: 101;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--duration-base) var(--ease-in-out);
}

.hamburger {
  position: relative;
}

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

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

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

.mobile-menu-toggle[aria-expanded="true"] .hamburger {
  background-color: transparent;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger::after {
  transform: rotate(-45deg);
  top: 0;
}

.mobile-menu-toggle:focus-visible {
  outline: 2px solid var(--color-primary-300);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .header-container {
    height: 70px;
  }
  
  .mobile-menu-toggle {
    display: block;
    order: 1;
    margin-left: auto;
    margin-right: var(--space-4);
  }
  
  .main-nav {
    position: static;
  }
  
  .nav-list {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-background);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: var(--space-12);
    gap: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--duration-slow) var(--ease-in-out);
    overflow-y: auto;
    z-index: 99;
  }
  
  .nav-list.is-open {
    transform: translateX(0);
  }
  
  .nav-list a {
    font-size: var(--text-xl);
    padding: var(--space-3) 0;
  }
  
  .header-cta {
    margin-left: 0;
    order: 2;
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
  }
}

@media (max-width: 480px) {
  .header-cta {
    display: none;
  }
}