.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-navbar);
  background-color: var(--color-nav-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: background-color var(--transition-base), border-color var(--transition-base),
    box-shadow var(--transition-base);
}

/* Entrance fade on page load. Opacity only — see .navbar__links comment below;
   a transform here would turn .navbar into the containing block for that
   fixed child and break the mobile off-canvas menu's off-screen position. */
@media (prefers-reduced-motion: no-preference) {
  .navbar {
    animation: navbar-fade-in 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
  }
}

@keyframes navbar-fade-in {
  from {
    opacity: 0;
  }
}

.navbar.is-scrolled {
  background-color: var(--color-nav-bg-scrolled);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.15rem;
}

.navbar__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.navbar__logo-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

.navbar__links a:not(.btn) {
  position: relative;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding-block: 0.3rem;
  transition: color var(--transition-base);
}

.navbar__links a:not(.btn)::after {
  content: '';
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--radius-pill);
  transition: right var(--transition-base);
}

.navbar__links a:not(.btn):hover {
  color: var(--color-primary);
}

.navbar__links a:not(.btn):hover::after,
.navbar__links a.is-active::after {
  right: 0;
}

.navbar__links a.is-active {
  color: var(--color-primary);
}

.navbar__cta {
  display: none;
  margin-left: var(--space-xs);
}

.navbar__cta .btn {
  padding: 0.7rem 1.4rem;
  font-size: var(--text-xs);
  box-shadow: 0 8px 20px rgba(61, 141, 122, 0.18);
}

.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  z-index: var(--z-navbar-toggle);
  padding: 0.5rem;
}

.navbar__toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: var(--radius-pill);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

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

.navbar__toggle.is-active span:nth-child(2) {
  opacity: 0;
}

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

@media (min-width: 900px) {
  .navbar__cta {
    display: inline-flex;
  }
}

@media (max-width: 899px) {
  .navbar__toggle {
    display: flex;
  }

  .navbar__links {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(75vw, 320px);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: var(--space-md);
    background-color: var(--color-panel-bg);
    border-left: 1px solid var(--color-border);
    padding: var(--space-lg) var(--space-md);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    box-shadow: var(--shadow-lg);
  }

  .navbar__links.is-open {
    transform: translateX(0);
  }

  .navbar__links a:not(.btn) {
    font-size: 1.05rem;
    color: var(--color-text);
  }

  .navbar__links .navbar__cta {
    display: inline-flex;
    margin-left: 0;
    margin-top: var(--space-xs);
  }

  .navbar__links .navbar__cta .btn {
    width: 100%;
    padding: 1rem 1.4rem;
    font-size: var(--text-sm);
  }
}