/* ═══════════════════════════════════════════
   navigation.css — Navigation & Mobile Menu
   ═══════════════════════════════════════════ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  height: var(--topbar-h);
  background: rgba(6, 9, 18, 0.75);
  backdrop-filter: blur(var(--backdrop-blur));
  -webkit-backdrop-filter: blur(var(--backdrop-blur));
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-base);
}

.nav.scrolled {
  background: rgba(6, 9, 18, 0.95);
  border-bottom-color: var(--border-default);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2-5);
  z-index: 10;
}

.nav-logo-icon {
  width: 34px;
  height: 34px;
  background: transparent;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  font-size: var(--text-lg);
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
}

.nav-logo-text span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width var(--transition-base);
}

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

.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Dil seçici */
.lang-switch-wrapper {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-right: var(--space-3);
  background: var(--bg-input);
  border-radius: var(--radius-pill);
  padding: 2px;
}

.lang-switch {
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--text-muted);
  border: none;
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-switch.active {
  background: var(--accent);
  color: var(--text-inverse);
}

.lang-switch:hover:not(.active) {
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: var(--weight-semibold);
  font-size: var(--text-sm);
  border-radius: var(--radius-pill);
  padding: 10px 22px;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--text-inverse);
  border: none;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent-sm);
  color: var(--text-inverse);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim2);
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: var(--weight-semibold);
  font-size: var(--text-base);
  border-radius: var(--radius-pill);
  padding: 14px 32px;
  background: var(--accent);
  color: var(--text-inverse);
  border: none;
  transition: all var(--transition-base);
}

.btn-hero-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent-md);
  color: var(--text-inverse);
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: var(--weight-medium);
  font-size: var(--text-base);
  border-radius: var(--radius-pill);
  padding: 14px 32px;
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  transition: all var(--transition-base);
}

.btn-hero-secondary:hover {
  border-color: var(--border-accent);
  background: var(--accent-dim2);
  color: var(--accent);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 10;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

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

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

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

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-overlay);
  background: rgba(6, 9, 18, 0.98);
  backdrop-filter: blur(var(--backdrop-blur));
  -webkit-backdrop-filter: blur(var(--backdrop-blur));
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu-inner {
  display: flex;
  flex-direction: column;
  padding: var(--space-8) 5vw;
  gap: var(--space-4);
  width: 100%;
}

.mobile-link {
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-cta {
  margin-top: var(--space-6);
  text-align: center;
  justify-content: center;
  padding: 14px 24px;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links,
  .nav-actions {
    display: none;
  }
  
  .nav-hamburger {
    display: flex;
  }
  
  .lang-switch-wrapper {
    display: none;
  }
}