.glass-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(170%) blur(18px);
  -webkit-backdrop-filter: saturate(170%) blur(18px);
  border-bottom: 1px solid var(--border-soft);
  box-shadow: var(--shadow-nav);
  transition: background var(--transition-default), box-shadow var(--transition-default);
}

.glass-nav--solid {
  background: var(--bg-white);
  box-shadow: var(--shadow-sm);
}

.nav-content {
  max-width: var(--content-max);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-3);
}

/* ===== Brand lockup ===== */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.nav-logo-glyph {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  flex-shrink: 0;
}

.nav-logo-mark {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink-900);
}

.nav-logo-by {
  font-family: var(--font-text);
  font-size: 13px;
  font-weight: 400;
  color: var(--ink-500);
}

.nav-links {
  display: flex;
  gap: var(--space-3);
}

.nav-links a {
  position: relative;
  font-family: var(--font-text);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-700);
  transition: color var(--transition-default);
  white-space: nowrap;
  padding: 4px 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--copper-500);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-default);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--copper-700);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-links a.nav-cta {
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--copper-50);
  color: var(--copper-700);
  font-weight: 600;
}

.nav-links a.nav-cta:hover {
  background: var(--copper-500);
  color: #fff;
}

.nav-links a.nav-cta::after {
  display: none;
}

.nav-social {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.nav-social a {
  display: flex;
  align-items: center;
  color: var(--ink-500);
  transition: color var(--transition-default);
}

.nav-social a:hover {
  color: var(--copper-500);
}

.nav-social svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 36px;
  height: 36px;
  padding: 8px;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--ink-900);
  border-radius: 1px;
  transition: transform var(--transition-default), opacity var(--transition-default);
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* Mobile Menu Overlay */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--nav-height);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
}

.nav-overlay.open {
  display: flex;
}

.nav-overlay a {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  color: var(--ink-900);
  letter-spacing: -0.01em;
  transition: color var(--transition-default);
}

.nav-overlay a:hover {
  color: var(--copper-700);
}

/* Responsive */
@media (max-width: 1060px) {
  .nav-logo-by {
    display: none;
  }

  .nav-links {
    gap: var(--space-2);
  }

  .nav-social {
    display: none;
  }
}

@media (max-width: 880px) {
  .nav-links,
  .nav-social {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .nav-logo-by {
    display: none;
  }
}