/* Header component styles (builds on base.css) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.25)), var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: saturate(120%) blur(6px);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px; height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  position: static;
  width: auto; height: auto;
  display: inline-block;
  margin: var(--space-8);
  padding: 8px 12px;
  background: var(--color-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-glow-teal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: var(--space-16);
}

.brand-link { display: inline-flex; align-items: center; gap: 12px; color: var(--gray-50); }
.brand-logo { width: 36px; height: 36px; border-radius: 8px; box-shadow: var(--shadow-glow-gold); }
.brand-text { font-family: var(--font-display); font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase; }

/* Navigation */

.nav-list { display: flex; align-items: center; gap: clamp(10px, 2vw, 20px); }
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--gray-100);
  transition: color var(--duration-normal) var(--ease-emphasized), background-color var(--duration-normal) var(--ease-emphasized), box-shadow var(--duration-normal) var(--ease-emphasized);
}
.nav-link:hover { color: var(--color-text); background: rgba(31, 228, 228, 0.08); box-shadow: inset 0 0 0 1px rgba(31, 228, 228, 0.25); }
.nav-link:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: linear-gradient(180deg, rgba(31, 228, 228, 0.08), rgba(31, 228, 228, 0.03));
  color: var(--color-text);
}
.menu-toggle:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; box-shadow: var(--shadow-glow-teal); }
.menu-label { font-weight: 600; letter-spacing: 0.02em; }
.menu-toggle-box { display: inline-flex; flex-direction: column; gap: 3px; }
.menu-bar { width: 20px; height: 2px; background: var(--color-primary); border-radius: 2px; transition: transform var(--duration-normal) var(--ease-emphasized), opacity var(--duration-normal) var(--ease-emphasized); }

/* Mobile behavior only when JS is enabled */
.js .menu-toggle { display: inline-flex; }
@media (max-width: 1024px) {
  .js .site-nav { position: fixed; inset: 64px 0 0 0; background: var(--color-elevated); border-top: 1px solid var(--color-border); transform: translateY(-8px); opacity: 0; pointer-events: none; transition: opacity var(--duration-slow) var(--ease-emphasized), transform var(--duration-slow) var(--ease-emphasized); }
  .js .site-nav .nav-list { flex-direction: column; align-items: stretch; padding: 12px; gap: 6px; background-color: black; }
  .js .site-header.is-open .site-nav { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .js .site-header.is-open .menu-bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
  .js .site-header.is-open .menu-bar:nth-child(2) { opacity: 0; }
  .js .site-header.is-open .menu-bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
}

/* Desktop */
@media (min-width: 1025px) {
  .menu-toggle { display: none !important; }
}