.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding-block: var(--space-8);
  transition:
    background-color var(--duration-nav) var(--ease-premium),
    backdrop-filter var(--duration-nav) var(--ease-premium),
    border-color var(--duration-nav) var(--ease-premium),
    padding var(--duration-nav) var(--ease-premium);
}

.navbar.is-scrolled:not(.is-open) {
  padding-block: var(--space-4);
  background: rgba(10, 15, 13, 0.85);
  backdrop-filter: blur(var(--blur-md));
  border-bottom: 1px solid var(--c-border);
}

.navbar.is-open {
  padding-block: var(--space-4);
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
  transition: none;
}

.navbar__inner {
  position: relative;
  z-index: calc(var(--z-nav) + 2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

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

.navbar__name {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--c-text);
}

.navbar__dot {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: var(--radius-sm);
  background: var(--c-accent);
}

.navbar__links {
  align-items: center;
  gap: var(--space-8);
}

.navbar__link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--c-muted);
  transition: color var(--duration-base) var(--ease-premium);
}

.navbar__link:hover,
.navbar__link.is-active {
  color: var(--c-text);
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.navbar__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2rem;
  height: 2rem;
  position: relative;
  z-index: calc(var(--z-nav) + 2);
}

.navbar__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--c-text);
  transition: transform var(--duration-base) var(--ease-premium),
    opacity var(--duration-base) var(--ease-premium);
}

.navbar.is-open .navbar__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.navbar.is-open .navbar__toggle-bar:nth-child(2) {
  opacity: 0;
}

.navbar.is-open .navbar__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Overlay sólido instantâneo — anima só o conteúdo */
.navbar__mobile {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-nav) + 1);
  background: var(--c-bg);
  padding: calc(var(--nav-height) + var(--space-8)) var(--container-pad) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.navbar.is-open .navbar__mobile {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.navbar__mobile .navbar__link,
.navbar__mobile .btn {
  display: block;
  opacity: 0;
  transform: translateY(var(--space-4));
  transition:
    opacity var(--duration-base) var(--ease-premium),
    transform var(--duration-base) var(--ease-premium),
    color var(--duration-base) var(--ease-premium);
}

.navbar__mobile .navbar__link {
  font-size: var(--text-lg);
  padding-block: var(--space-3);
}

.navbar.is-open .navbar__mobile .navbar__link,
.navbar.is-open .navbar__mobile .btn {
  opacity: 1;
  transform: translateY(0);
  transition-delay: var(--duration-fast);
}

body.is-nav-open {
  overflow: hidden;
  touch-action: none;
}