/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 3rem;
  transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

.nav.scrolled {
  background: #fff;
  box-shadow: 0 1px 0 var(--border);
}

.nav-logo {
  display: flex;
  align-items: center;
}

.nav-logo-img {
  height: 54px;
  width: auto;
  max-width: 54px;
  object-fit: contain;
  display: block;
  transition: transform 0.3s var(--ease-out-expo), box-shadow 0.3s ease;
}
.nav-logo-img:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 16px rgba(4,106,129,0.35);
}

.nav-scrolled-only { opacity:0; transition: opacity 0.4s; }
.nav.scrolled .nav-scrolled-only { opacity:1; }

.nav-cta {
  background: var(--teal);
  color: #fff;
  padding: 11px 26px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: background 0.2s, transform 0.2s;
}
.nav-cta:hover { background: var(--teal-dark); transform: translateY(-1px); }

/* ---- Nav links (desktop) ---- */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--slate);
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--teal); }
.nav.scrolled .nav-links a { color: var(--charcoal); }
.nav.scrolled .nav-links a:hover { color: var(--teal); }

/* ---- Nav right group ---- */
.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ---- Hamburger button ---- */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.2s;
}
.nav-burger:hover { background: rgba(4,106,129,0.08); }
.nav-burger span {
  display: block;
  width: 100%;
  height: 2px;
  background: rgba(255,255,255,0.75);
  border-radius: 2px;
  transition: background 0.4s ease;
}
.nav.scrolled .nav-burger span { background: var(--charcoal); }

/* ---- Full-screen overlay ---- */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 1001;
  background: var(--charcoal);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.nav-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.nav-overlay-close {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  background: transparent;
  border: none;
  color: rgba(255,255,255,0.5);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s;
}
.nav-overlay-close:hover { color: #fff; }

.nav-overlay-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  margin-bottom: 2.5rem;
}
.nav-overlay-links a {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  letter-spacing: -0.01em;
  padding: 0.4rem 1rem;
  transition: color 0.2s;
}
.nav-overlay-links a:hover { color: #fff; }

.nav-overlay-cta {
  background: var(--teal);
  color: #fff;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: background 0.2s, transform 0.2s;
  margin-top: 1rem;
}
.nav-overlay-cta:hover { background: var(--teal-dark); transform: translateY(-1px); }

/* ---- Responsive breakpoints ---- */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-burger { display: flex; }
}

@media (max-width: 600px) {
  .nav { padding: 0 1.25rem; height: 60px; }
  .nav-cta { padding: 9px 18px; font-size: 12px; }
}