/* ============================================
   FUTURE DIGITAL — Navbar
   Apple-style glassmorphism sticky navigation
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-navbar);
  padding: var(--space-4) 0;
  transition: all var(--duration-normal) var(--ease-out);
}

.navbar.is-scrolled {
  background: var(--navbar-scrolled-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--bg-glass-border);
  padding: var(--space-3) 0;
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ── Logo ── */
.navbar__logo {
  display: flex;
  align-items: center;
  transition: all var(--duration-normal) var(--ease-out);
}

.navbar__logo:hover {
  opacity: 0.8;
}

.navbar__logo-img {
  width: 200px;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  transition: all var(--duration-normal) var(--ease-out);
}

/* ── Nav Links ── */
.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.navbar__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--navbar-link);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.navbar.is-scrolled .navbar__link {
  color: var(--navbar-scrolled-link);
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--navbar-link-line);
  transition: all var(--duration-normal) var(--ease-out);
}

.navbar.is-scrolled .navbar__link::after {
  background: var(--navbar-scrolled-link-line);
}

.navbar__link:hover {
  color: var(--navbar-link-hover);
}

.navbar.is-scrolled .navbar__link:hover {
  color: var(--navbar-scrolled-link-hover);
}

.navbar__link:hover::after {
  width: 100%;
}

/* ── Right Controls (Lang + Theme) ── */
.navbar__controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ── Theme Toggle ── */
.navbar__theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--navbar-lang-bg);
  border: 1px solid var(--navbar-lang-border);
  color: var(--navbar-lang-color);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  font-size: 18px;
  user-select: none;
}

.navbar.is-scrolled .navbar__theme-toggle {
  background: var(--bg-glass);
  border-color: var(--bg-glass-border);
  color: var(--text-primary);
}

.navbar__theme-toggle:hover {
  transform: rotate(15deg) scale(1.1);
  border-color: var(--accent-2shtec);
}

/* Icon switching */
.navbar__theme-toggle .icon-sun { display: none; }
.navbar__theme-toggle .icon-moon { display: block; }

[data-theme="light"] .navbar__theme-toggle .icon-sun { display: block; }
[data-theme="light"] .navbar__theme-toggle .icon-moon { display: none; }

/* ── Lang Switcher (Dropdown) ── */
.navbar__lang {
  position: relative;
}

.navbar__lang-current {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  background: var(--navbar-lang-bg);
  border: 1px solid var(--navbar-lang-border);
  color: var(--navbar-lang-color);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  letter-spacing: 0.5px;
  user-select: none;
}

.navbar.is-scrolled .navbar__lang-current {
  background: var(--bg-glass);
  border-color: var(--bg-glass-border);
  color: var(--text-primary);
}

.navbar__lang-current::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid var(--text-tertiary);
  transition: transform var(--duration-fast) var(--ease-out);
}

.navbar__lang.is-open .navbar__lang-current::after {
  transform: rotate(180deg);
}

.navbar__lang-current:hover {
  border-color: var(--text-tertiary);
}

.navbar__lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 52px;
  background: rgba(20, 20, 22, 0.95);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: all var(--duration-fast) var(--ease-out);
  z-index: 100;
}

[data-theme="light"] .navbar__lang-dropdown {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

.navbar__lang.is-open .navbar__lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.navbar__lang-btn {
  display: block;
  width: 100%;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--text-tertiary);
  text-align: center;
  transition: all var(--duration-fast) var(--ease-out);
  letter-spacing: 0.5px;
}

.navbar__lang-btn.is-active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
  display: none; /* hide active from dropdown */
}

[data-theme="light"] .navbar__lang-btn.is-active {
  background: rgba(0, 0, 0, 0.06);
}

.navbar__lang-btn:hover:not(.is-active) {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

[data-theme="light"] .navbar__lang-btn:hover:not(.is-active) {
  background: rgba(0, 0, 0, 0.06);
}

/* ── Mobile Menu Toggle ── */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  padding: 4px 0;
}

.navbar__toggle-line {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--navbar-toggle-line);
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
  transform-origin: center;
}

.navbar.is-scrolled .navbar__toggle-line {
  background: var(--text-primary);
}

.navbar__toggle.is-open .navbar__toggle-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

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

.navbar__toggle.is-open .navbar__toggle-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── Mobile Menu ── */
.navbar__mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(5, 5, 5, 0.95);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-10);
  z-index: calc(var(--z-navbar) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out);
}

[data-theme="light"] .navbar__mobile-menu {
  background: rgba(255, 255, 255, 0.95);
}

.navbar__mobile-menu.is-open {
  opacity: 1;
  pointer-events: auto;
}

.navbar__mobile-link {
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  color: var(--text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}

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

/* ── Responsive ── */
@media (max-width: 768px) {
  .navbar__links {
    display: none;
  }

  .navbar__toggle {
    display: flex;
  }

  .navbar__controls {
    margin-right: var(--space-4);
  }
}