/* ==========================================================================
   NEXORA — Navbar
   Fixed/transparent over the hero, gains a blurred surface on scroll.
   Reuses the shared design tokens/buttons — no separate visual system.
   ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding-block: var(--space-4);
  background: transparent;
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  transition: background 0.4s var(--ease-premium), border-color 0.4s var(--ease-premium), backdrop-filter 0.4s var(--ease-premium), padding-block 0.3s var(--ease-premium);
}

.navbar.is-scrolled {
  background: rgba(6, 9, 14, 0.72);
  border-bottom-color: var(--border-color);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding-block: var(--space-3);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.navbar__brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.navbar__brand-logo {
  display: block;
  height: 24px;
  width: auto;
  transition: filter 0.3s ease;
}

.navbar__brand:hover .navbar__brand-logo {
  filter: brightness(1.15) saturate(1.15);
}

@media (max-width: 480px) {
  .navbar__brand-logo {
    height: 20px;
  }
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.navbar__links > a,
.navbar__item > button {
  position: relative;
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  padding-block: 4px;
  transition: color 0.3s ease;
}

.navbar__links > a::after,
.navbar__item > button::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--accent-gradient);
  transition: width 0.3s var(--ease-premium);
}

.navbar__links > a:hover,
.navbar__item > button:hover,
.navbar__item.is-open > button {
  color: var(--text-primary);
}

.navbar__links > a:hover::after,
.navbar__item > button:hover::after,
.navbar__item.is-open > button::after {
  width: 100%;
}

.navbar__links > a.is-active,
.navbar__item > button.is-active {
  color: var(--text-primary);
}

.navbar__links > a.is-active::after,
.navbar__item > button.is-active::after {
  width: 100%;
}

/* Dropdown trigger */
.navbar__item {
  position: relative;
}

.navbar__item > button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.navbar__item > button svg {
  width: 12px;
  height: 12px;
  transition: transform 0.3s var(--ease-premium);
}

.navbar__item.is-open > button svg {
  transform: rotate(180deg);
}

.navbar__dropdown {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translate(-50%, 8px);
  min-width: 240px;
  padding: var(--space-3);
  background: rgba(10, 14, 20, 0.92);
  border: 1px solid var(--border-color-strong);
  border-radius: var(--radius-md);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s var(--ease-premium), transform 0.25s var(--ease-premium), visibility 0.25s;
}

.navbar__item.is-open .navbar__dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

.navbar__dropdown a {
  display: block;
  padding: 0.6em 0.75em;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: background 0.2s ease, color 0.2s ease;
}

.navbar__dropdown a:hover,
.navbar__dropdown a:focus-visible {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

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

.navbar__actions .btn {
  padding: 0.6em 1.2em;
  font-size: var(--text-xs);
}

.navbar__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
}

.navbar__toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-premium), opacity 0.3s var(--ease-premium);
}

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

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

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

.navbar__mobile {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  max-height: 0;
  overflow: hidden;
  padding-inline: var(--container-pad);
  background: rgba(6, 9, 14, 0.97);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  opacity: 0;
  transition: opacity 0.3s var(--ease-premium), max-height 0.35s var(--ease-premium);
}

.navbar__mobile.is-open {
  display: flex;
  max-height: 80vh;
  overflow-y: auto;
  opacity: 1;
  padding-block: var(--space-4) var(--space-5);
  border-bottom-color: var(--border-color);
}

.navbar__mobile > a,
.navbar__mobile-group > button {
  font-size: var(--text-base);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  padding-block: var(--space-2);
  opacity: 0;
  transform: translateY(-6px);
  transition: color 0.2s ease, opacity 0.3s var(--ease-premium), transform 0.3s var(--ease-premium);
}

.navbar__mobile.is-open > a,
.navbar__mobile.is-open .navbar__mobile-group > button {
  opacity: 1;
  transform: translateY(0);
}

.navbar__mobile.is-open > *:nth-child(1) { transition-delay: 0.02s; }
.navbar__mobile.is-open > *:nth-child(2) { transition-delay: 0.06s; }
.navbar__mobile.is-open > *:nth-child(3) { transition-delay: 0.1s; }
.navbar__mobile.is-open > *:nth-child(4) { transition-delay: 0.14s; }
.navbar__mobile.is-open > *:nth-child(5) { transition-delay: 0.18s; }

.navbar__mobile a:hover {
  color: var(--text-primary);
}

.navbar__mobile-group > button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.navbar__mobile-group > button svg {
  width: 14px;
  height: 14px;
  transition: transform 0.3s var(--ease-premium);
  color: var(--text-muted);
}

.navbar__mobile-group.is-open > button svg {
  transform: rotate(180deg);
}

.navbar__mobile-sublist {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s var(--ease-premium);
}

.navbar__mobile-group.is-open .navbar__mobile-sublist {
  max-height: 220px;
}

.navbar__mobile-sublist a {
  display: block;
  padding: var(--space-2) 0 var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.navbar__mobile-sublist a:hover {
  color: var(--text-primary);
}

.navbar__mobile .navbar__mobile-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-3);
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.3s var(--ease-premium), transform 0.3s var(--ease-premium);
  transition-delay: 0.22s;
}

.navbar__mobile.is-open .navbar__mobile-actions {
  opacity: 1;
  transform: translateY(0);
}

.navbar__mobile .btn {
  width: 100%;
  text-align: center;
}

@media (max-width: 900px) {
  .navbar__links,
  .navbar__actions {
    display: none;
  }

  .navbar__toggle {
    display: flex;
  }
}

@media (prefers-reduced-motion: reduce) {
  .navbar,
  .navbar__toggle span,
  .navbar__dropdown,
  .navbar__mobile,
  .navbar__mobile > a,
  .navbar__mobile-group > button,
  .navbar__mobile-actions {
    transition: none !important;
  }
}