/* Lock body scroll when mobile menu is open */
body.nav-open {
  overflow: hidden;
}

/* Spacer element inserted by JS to offset fixed nav */
.site-nav-spacer {
  height: 3.5rem;
}

.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  max-height: 100vh;
  max-height: 100dvh;
  overflow-y: auto;
  border-bottom: 1px solid var(--cp-border);
  background: var(--cp-panel-strong);
  backdrop-filter: blur(10px);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
}

.site-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--cp-text);
  font-weight: 700;
  letter-spacing: 0.03em;
  text-decoration: none;
}

.site-nav__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 0.625rem;
  background: var(--cp-accent-soft);
  color: var(--cp-accent);
  border: 1px solid var(--cp-border);
}

/* Hamburger button */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.4); }
  50%      { box-shadow: 0 0 8px 3px rgba(255, 255, 255, 0.25); }
}

.site-nav__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: 2px solid #fff;
  border-radius: 0.5rem;
  background: rgba(19, 41, 75, 0.6);
  color: #fff;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: background 150ms ease, border-color 150ms ease;
  animation: pulse-glow 2.5s ease-in-out infinite;
}

.site-nav__toggle:hover,
.site-nav__toggle:focus-visible {
  background: rgba(123, 175, 212, 0.3);
  border-color: #7BAFD4;
  outline: none;
  animation: none;
}

.site-nav__hamburger {
  position: relative;
  display: block;
  width: 22px;
  height: 3px;
  background-color: #fff;
  border-radius: 2px;
  transition: background-color 200ms ease;
}

.site-nav__hamburger::before,
.site-nav__hamburger::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: #fff;
  border-radius: 2px;
  transition: transform 200ms ease;
}

.site-nav__hamburger::before { top: -7px; }
.site-nav__hamburger::after { top: 7px; }

.site-nav__toggle[aria-expanded="true"] .site-nav__hamburger {
  background-color: transparent;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__hamburger::before {
  transform: translateY(7px) rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__hamburger::after {
  transform: translateY(-7px) rotate(-45deg);
}

/* Dropdown menu */
.site-nav__menu {
  width: 100%;
  padding: 0.75rem 0 0.5rem;
  display: grid;
  gap: 1rem;
  transition: opacity 200ms ease, transform 200ms ease;
}

.site-nav__menu[hidden] {
  display: none;
}

.site-nav__menu.opening {
  opacity: 0;
  transform: translateY(-8px);
}

.site-nav__menu.open {
  opacity: 1;
  transform: translateY(0);
}

.site-nav__group {
  display: grid;
  gap: 0.35rem;
}

.site-nav__group-label {
  display: block;
  padding: 0.25rem 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--cp-text-muted);
}

.site-nav__group-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2rem;
  padding: 0.35rem 0.7rem;
  border-radius: 0.5rem;
  border: 1px solid var(--cp-border);
  color: var(--cp-text-muted);
  font-size: 0.9rem;
  text-decoration: none;
  transition: border-color 150ms ease, color 150ms ease, background 150ms ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link[aria-current='page'] {
  color: var(--cp-text);
  border-color: var(--cp-border-strong);
  background: var(--cp-accent-soft);
  outline: none;
}

/* Hamburger is always visible — no inline desktop breakpoint */