.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--duration-fast) var(--easing-standard);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg) 0;
}

.logo {
  display: flex;
  align-items: center;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-image {
  height: 45px;
  width: auto;
  transition: transform var(--duration-fast) var(--easing-standard);
}

.logo-link:hover .logo-image {
  transform: scale(1.05);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-link {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  transition: color var(--duration-fast) var(--easing-standard);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--duration-fast) var(--easing-standard);
}

.nav-link:hover {
  color: var(--color-primary);
}

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

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-foreground);
  transition: all var(--duration-fast) var(--easing-standard);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 73px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--easing-standard);
}

.mobile-menu.active {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  padding: var(--spacing-2xl);
}

.mobile-nav-link {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.btn-block {
  width: 100%;
  margin-top: var(--spacing-lg);
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .mobile-menu {
    display: block;
  }
}

/* Add spacing for fixed header */
body {
  padding-top: 73px;
}