/**
 * Site header: logo, menu trigger. Fixed, transparent over hero,
 * solid background elsewhere (toggled via .site-header--solid in Phase 2/3 JS).
 */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9970;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--gutter);
  color: var(--color-text);
}

.site-header__logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

.site-header__menu-trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
}

.site-header__menu-trigger .label {
  color: var(--color-text);
}

.site-header__burger {
  position: relative;
  width: 28px;
  height: 14px;
}

.site-header__burger span {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: currentColor;
  transition: transform var(--duration-fast) var(--ease-organic),
              opacity var(--duration-fast) var(--ease-organic);
}

.site-header__burger span:first-child {
  top: 0;
}

.site-header__burger span:last-child {
  bottom: 0;
}

body.menu-is-open .site-header__burger span:first-child {
  transform: translateY(6.5px) rotate(45deg);
}

body.menu-is-open .site-header__burger span:last-child {
  transform: translateY(-6.5px) rotate(-45deg);
}