/* Header styles scoped to .site-header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(5, 7, 11, 0.95), rgba(5, 7, 11, 0.85), transparent 100%);
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

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

.site-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
}

.site-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 30%;
  background: radial-gradient(circle at 20% 20%, #39d2ff, #04668f 55%, #05070b 100%);
  box-shadow: var(--shadow-glow-primary);
  position: relative;
  overflow: hidden;
}

.site-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: inherit;
  border: 1px solid rgba(248, 250, 252, 0.22);
  box-shadow: inset 0 0 16px rgba(15, 23, 42, 0.8);
}

.site-header__logo-text {
  display: flex;
  flex-direction: column;
}

.site-header__logo-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header__logo-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Navigation */
.site-header__nav {
  display: flex;
  align-items: center;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-header__nav-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: 8px 10px;
  border-radius: var(--radius-pill);
  position: relative;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(57, 210, 255, 0.9), transparent);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--gray-50);
  background: rgba(15, 23, 42, 0.9);
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

.site-header__nav-link--accent {
  color: var(--gray-50);
  border: 1px solid rgba(57, 210, 255, 0.7);
  padding-inline: 14px;
  background: radial-gradient(circle at top left, rgba(57, 210, 255, 0.2), rgba(15, 23, 42, 0.9));
}

.site-header__nav-link--accent::after {
  display: none;
}

.site-header__nav-link--accent:hover,
.site-header__nav-link--accent:focus-visible {
  box-shadow: var(--shadow-glow-primary);
}

/* Mobile toggle */
.site-header__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.95);
  color: var(--color-text);
  cursor: pointer;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), transform var(--transition-fast);
}

.site-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--gray-100);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-header__toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Default: mobile first */
.site-header__nav {
  position: fixed;
  inset: 64px 0 auto 0;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}

.site-header__nav-list {
  flex-direction: column;
  align-items: flex-start;
  margin: 0 var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-xl);
  background: radial-gradient(circle at top left, rgba(57, 210, 255, 0.12), transparent 60%),
              linear-gradient(145deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.9));
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: var(--shadow-md);
}

.site-header--menu-open .site-header__nav {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.site-header--menu-open .site-header__toggle {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow-primary);
}

.site-header--menu-open .site-header__toggle-bar:first-child {
  transform: translateY(3px) rotate(45deg);
}

.site-header--menu-open .site-header__toggle-bar:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

/* Hide nav visually (but keep accessible) when JS is disabled via no-js class (optional) handled by server) */

/* Desktop layout */
@media (min-width: 768px) {
  .site-header__inner {
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
  }

  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    position: static;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }

  .site-header__nav-list {
    flex-direction: row;
    padding: 0;
    margin: 0;
    background: none;
    border: none;
    box-shadow: none;
  }
}

@media (min-width: 1024px) {
  .site-header__logo-title {
    font-size: var(--font-size-base);
  }

  .site-header__logo-subtitle {
    font-size: var(--font-size-xs);
  }
}