/* =============================================
   TONARHA — Navigation Bar
   ============================================= */

#navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: background-color 0.3s ease, border-bottom-color 0.3s ease;
  border-bottom: 1px solid transparent;
}

#navbar.scrolled {
  background-color: rgba(10, 10, 10, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: rgba(255, 101, 0, 0.4);
}

/* ===== Inner layout ===== */
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 2rem;
}

/* ===== Logo ===== */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-orange);
  letter-spacing: 0.1em;
  flex-shrink: 0;
  transition: var(--t-fast);
}

.nav-logo:hover {
  color: var(--color-orange-hover);
}

.nav-logo-mark {
  width: 30px;
  height: 30px;
  display: block;
  flex-shrink: 0;
  /* Invert black logo to white, then screen-blend makes black bg disappear */
  filter: invert(1);
  mix-blend-mode: screen;
  transition: var(--t-fast);
}

.nav-logo:hover .nav-logo-mark {
  filter: invert(1) sepia(1) saturate(4) hue-rotate(340deg);
}

/* ===== Desktop nav links ===== */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: var(--t-fast);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}

.nav-links a:hover {
  color: var(--color-text);
  border-bottom-color: var(--color-orange);
}

/* ===== Right side actions ===== */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-shrink: 0;
}

/* ===== Language toggle ===== */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.lang-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: var(--t-fast);
  padding: 0.1rem 0;
  background: none;
  border: none;
  cursor: pointer;
}

.lang-btn:hover {
  color: var(--color-text);
}

.lang-btn.active {
  color: var(--color-orange);
}

.lang-sep {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--color-border);
  user-select: none;
}

/* ===== CTA button in nav ===== */
.nav-cta {
  padding: 0.5rem 1rem;
  font-size: 0.68rem;
}

/* ===== Hamburger ===== */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px 4px;
  cursor: pointer;
  z-index: 1002;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform 0.25s ease, opacity 0.2s ease;
  transform-origin: center;
}

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

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

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

/* ===== Mobile full-screen overlay ===== */
.nav-mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: var(--color-bg);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3.5rem;
}

.nav-mobile-overlay.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.nav-mobile-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.nav-mobile-links a {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text);
  transition: var(--t-fast);
}

.nav-mobile-links a:hover {
  color: var(--color-orange);
}

.nav-mobile-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.nav-mobile-footer .lang-toggle {
  gap: 0.5rem;
}

.nav-mobile-footer .lang-btn {
  font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 767px) {
  .nav-links,
  .nav-actions {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .nav-mobile-overlay {
    display: flex;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .nav-links {
    gap: 1.25rem;
  }
}