/* ============================================================
   Resonant System v2 — Site nav + mobile menu overlay
   Desktop: full-width nav with wordmark + links
   Mobile (<768px): hamburger triggers a full-page overlay menu
   ============================================================ */

/* ===== Desktop nav ===== */
.site-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 3rem 1.75rem;
  display: flex;
  align-items: baseline;
}
.site-nav .wordmark {
  font-family: 'Source Serif 4', serif;
  font-size: 1.65rem;
  font-weight: 500;
  color: var(--heading);
  letter-spacing: -0.005em;
}

.site-nav .links {
  margin-left: auto;
  display: flex;
  gap: 2rem;
}
.site-nav .links a {
  font-family: 'Inter', sans-serif;
  font-size: 0.92rem;
  color: var(--body);
}
.site-nav .links a:hover { color: var(--accent); }

.site-nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 0;
  padding: 0.6rem;
  color: var(--heading);
  cursor: pointer;
  align-self: center;
}

.site-nav-toggle .menu-label {
  display: none;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  color: var(--heading);
  letter-spacing: 0.005em;
  margin-left: 0.5rem;
}

.site-nav-rule {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 3rem;
}
.site-nav-rule div { height: 1px; background: var(--hairline); }
@media (max-width: 640px) {
  .site-nav-rule { padding: 0 1.5rem; }
}

@media (max-width: 768px) {
  .site-nav {
    align-items: center;
    padding: 1.85rem 1.5rem 1.4rem;
  }
  .site-nav .wordmark { font-size: 1.55rem; }
  .site-nav .links { display: none; }
  .site-nav-toggle {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.2rem 0.4rem 0.4rem;
  }
  .site-nav-toggle .menu-label {
    display: inline-flex;
    align-items: center;
  }
}

/* ===== Mobile menu (full-page overlay) ===== */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 50;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  display: flex;
  flex-direction: column;
}
.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  padding: 1.5rem 1.5rem 1.25rem;
  border-bottom: 1px solid var(--hairline);
}
.mobile-menu-header .wordmark {
  font-family: 'Source Serif 4', serif;
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--heading);
  letter-spacing: -0.005em;
}
.mobile-menu-close {
  margin-left: auto;
  background: none;
  border: 0;
  padding: 0.6rem;
  color: var(--heading);
  cursor: pointer;
  transition: color 0.15s;
}
.mobile-menu-close:hover { color: var(--accent); }

.mobile-menu-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem 1.5rem;
  gap: 1.75rem;
}
.mobile-menu-nav a {
  font-family: 'Source Serif 4', serif;
  font-size: 2rem;
  font-weight: 500;
  color: var(--heading);
  text-decoration: none;
  letter-spacing: -0.01em;
  line-height: 1.1;
  transition: color 0.15s;
}
.mobile-menu-nav a:hover { color: var(--accent); }

.mobile-menu-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--hairline);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.02em;
}