/* ── Navigation ──────────────────────────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease-base), background var(--ease-base);
}
.site-nav.is-scrolled {
  border-bottom-color: var(--color-border);
  background: rgba(255,255,255,0.96);
}
.nav-container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  height: 72px;
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav-logo { flex-shrink: 0; display: flex; align-items: center; text-decoration: none; }
.nav-logo img { display: none; }

/* ── Logo lockup ─────────────────────────────────────────────────────────── */
.logo-lockup {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  user-select: none;
}
.logo-mark { display: block; flex-shrink: 0; }
.logo-wordmark {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  line-height: 1;
  white-space: nowrap;
  color: var(--color-text);
  text-transform: uppercase;
}
.logo-wordmark__bold  { font-weight: 700; }
.logo-wordmark__light { font-weight: 400; opacity: 0.55; }

/* White variant */
.logo-lockup--white .logo-wordmark        { color: #ffffff; }
.logo-lockup--white .logo-wordmark__light { opacity: 0.5; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}
.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--ease-fast), background var(--ease-fast);
  white-space: nowrap;
}
.nav-link:hover   { color: var(--color-text); background: var(--color-bg-muted); }
.nav-link--active { color: var(--color-accent); font-weight: var(--weight-semi); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-left: var(--space-4);
  flex-shrink: 0;
}
.nav-portal-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-3);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--ease-fast);
}
.nav-portal-link:hover { color: var(--color-accent); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  /* 44×44 px minimum tap target */
  width: 44px;
  height: 44px;
  padding: var(--space-3);
  margin-left: auto;
  cursor: pointer;
  background: none;
  border: none;
  align-items: center;
  justify-content: center;
  z-index: 1;
}
.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--ease-base), opacity var(--ease-base);
}
.nav-hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.is-open span:nth-child(2) { opacity: 0; }
.nav-hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Main content offset */
body { padding-top: 72px; }

/* ── Mobile Nav Drawer ────────────────────────────────────────────────────── */
.mobile-nav {
  position: fixed;
  top: 72px; left: 0; right: 0; bottom: 0;
  z-index: 99;
  background: #fff;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateX(100%);
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  border-top: 1px solid var(--color-border-soft);
  display: none;      /* overridden in media query */
  flex-direction: column;
}
.mobile-nav.is-open { transform: translateX(0); }

/* ── Link list ── */
.mobile-nav nav {
  display: flex;
  flex-direction: column;
  padding: var(--space-4) var(--space-5) var(--space-2);
  flex: 1;
}

/* ── Individual links ── */
.mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--color-text-2);
  padding: 1rem 0.75rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--ease-fast), color var(--ease-fast);
}
.mobile-nav__link::after {
  content: '';
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
  transform: rotate(45deg);
  opacity: 0.25;
  transition: opacity var(--ease-fast), transform var(--ease-fast);
}
.mobile-nav__link:hover {
  background: var(--color-bg-soft);
  color: var(--color-text);
}
.mobile-nav__link:hover::after { opacity: 0.5; transform: rotate(45deg) translate(2px, -2px); }
.mobile-nav__link--active {
  color: var(--color-accent);
  background: var(--color-accent-light);
}
.mobile-nav__link--active::after { opacity: 0.45; }

/* ── Divider ── */
.mobile-nav__divider {
  height: 1px;
  background: var(--color-border-soft);
  margin: var(--space-2) 0.75rem;
}

/* ── Portal link ── */
.mobile-nav__link--portal {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0;
  color: var(--color-accent);
  background: var(--color-accent-light);
}
.mobile-nav__link--portal:hover {
  color: var(--color-accent-hover);
  background: #dce3f8;
}
.mobile-nav__link--portal::after { display: none; }

/* ── CTA footer ── */
.mobile-nav__cta {
  padding: var(--space-5) var(--space-5) calc(var(--space-8) + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--color-border-soft);
  background: var(--color-bg-soft);
}
.mobile-nav__cta .btn {
  width: 100%;
  justify-content: center;
  font-size: var(--text-base);
  padding: 0.875rem 1.5rem;
}

/* ── Backdrop ── */
.mobile-nav-backdrop {
  display: none;
  position: fixed;
  inset: 72px 0 0 0;
  z-index: 98;
  background: rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: opacity 0.28s ease;
  pointer-events: none;
}
.mobile-nav-backdrop.is-open { opacity: 1; pointer-events: auto; }

@media (max-width: 1024px) {
  .nav-actions         { display: none; }
  .nav-hamburger       { display: flex; }
  .nav-links           { display: none; }
  .mobile-nav          { display: flex; }
  .mobile-nav-backdrop { display: block; }
}