/* ==========================================================================
   Header Styles
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(18, 18, 18, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(157, 0, 255, 0.2);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  padding: var(--space-3) 0;
}

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

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

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 900;
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 1px;
  text-shadow: 0 0 10px rgba(157, 0, 255, 0.5);
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
}

.nav-link {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-main);
  letter-spacing: 0.05em;
  position: relative;
  padding: var(--space-2) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--primary);
  transition: width var(--transition-normal);
  box-shadow: var(--shadow-neon);
}

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

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  z-index: 1001;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px 0;
  background-color: var(--text-main);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

@media (max-width: 991px) {
  .mobile-menu-toggle {
    display: block;
  }
  
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 400px;
    background-color: var(--bg-surface-alt);
    flex-direction: column;
    justify-content: center;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    border-left: 1px solid rgba(157, 0, 255, 0.2);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.8);
  }
  
  .site-nav.is-open {
    transform: translateX(0);
  }
  
  .nav-list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-8);
  }
  
  .nav-link {
    font-size: var(--text-xl);
  }
  
  /* Hamburger animation */
  .mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
    background-color: var(--primary);
  }
  .mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
  }
  .mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
    background-color: var(--primary);
  }
}