/* ================================================================
   BFPD — NAVIGATION
   Sticky header, desktop links, mobile hamburger + overlay
   ================================================================ */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(248,246,242,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--transition-smooth),
              box-shadow var(--transition-smooth),
              height var(--transition-smooth);
}
.site-nav.scrolled {
  background: rgba(248,246,242,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 24px rgba(0,0,0,0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  transition: height var(--transition-smooth);
}
.site-nav.scrolled .nav-inner { height: 58px; }

/* ===== LOGO ===== */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo img, .nav-logo svg {
  width: 38px;
  height: 38px;
  transition: width var(--transition-smooth), height var(--transition-smooth);
}
.site-nav.scrolled .nav-logo img,
.site-nav.scrolled .nav-logo svg {
  width: 30px;
  height: 30px;
}
.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.nav-logo-name {
  font-family: var(--font-display);
  font-size: 1.55rem;
  color: var(--night);
  letter-spacing: 0.04em;
}
.nav-logo-sub {
  font-family: var(--font-body);
  font-size: 0.6rem;
  color: var(--smoke);
  letter-spacing: 0.02em;
  font-weight: 500;
  text-transform: uppercase;
}

/* ===== DESKTOP LINKS ===== */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-links a {
  position: relative;
  padding: 8px 14px;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--steel);
  border-radius: 6px;
  transition: color var(--transition-base), background var(--transition-base);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--fire);
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 300ms var(--ease-out-expo);
}
.nav-links a:hover { color: var(--fire); }
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }
.nav-links a.active { color: var(--fire); }

/* ===== DONATE PILL ===== */
.nav-donate {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 10px;
  padding: 8px 20px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: var(--white);
  background: var(--ember);
  border: none;
  border-radius: 40px;
  text-transform: uppercase;
  transition: background var(--transition-base), transform var(--transition-base);
}
.nav-donate:hover {
  background: var(--ember-dark);
  transform: translateY(-1px);
}

/* ===== HAMBURGER ===== */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 1002;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2.5px;
  background: var(--night);
  border-radius: 2px;
  transition: transform 300ms var(--ease-out-expo), opacity 200ms ease;
  transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ===== MOBILE OVERLAY ===== */
.mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--night);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms ease;
}
.mobile-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-overlay a {
  font-family: var(--font-display);
  font-size: clamp(32px, 7vw, 48px);
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.06em;
  padding: 8px 20px;
  transition: color var(--transition-base);
  text-transform: uppercase;
}
.mobile-overlay a:hover,
.mobile-overlay a.active { color: var(--ember); }
.mobile-overlay .nav-donate {
  margin-top: 20px;
  font-size: 1.1rem;
  padding: 12px 32px;
}

@media (max-width: 960px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
}