/* ===========================
   NAVIGATION & MOBILE MENU FIXES
   Theme-aware version — works with design-system.css tokens
   Version: 2.0 | 2025-05-18
   =========================== */

/* ── Navigation Container ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--nav-bg, var(--bg-primary));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1rem, 4vw, 3rem);
  height: 64px;
  border-bottom: 1px solid var(--border-primary);
}

.navbar.scrolled {
  box-shadow: var(--nav-shadow, var(--shadow-sm));
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

/* ── Logo ── */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1rem;
  color: var(--text-primary);
  line-height: 1.2;
  font-weight: 700;
}

.navbar__logo img {
  height: 32px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  display: block;
}

.navbar__logo:hover {
  text-decoration: none;
  opacity: 0.85;
}

/* ── Navigation Links ── */
.navbar__links {
  display: flex;
  gap: clamp(0.6rem, 1.5vw, 1.8rem);
  list-style: none;
  align-items: center;
  margin: 0;
  padding: 0;
  flex: 1;
  justify-content: center;
}

.navbar__link {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  padding: 0.3rem 0;
  border-bottom: 2px solid transparent;
  transition: color 220ms ease, border-color 220ms ease;
  white-space: nowrap;
  opacity: 0.82;
}

.navbar__link:hover,
.navbar__link[aria-current="page"] {
  color: var(--color-brand-primary, #E53935);
  border-bottom-color: var(--color-brand-primary, #E53935);
  opacity: 1;
}

/* ── Language Switcher ── */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 100px;
  padding: 0.2rem 0.3rem;
  flex-shrink: 0;
  margin-left: 1rem;
}

.lang-switcher__option,
.lang-switcher .lang-btn {
  padding: 0.28rem 0.72rem;
  border-radius: 100px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  font-family: inherit;
  transition: background 220ms ease, color 220ms ease;
  line-height: 1;
  text-decoration: none;
}

.lang-switcher__option--active,
.lang-switcher__option[aria-current="page"],
.lang-switcher .lang-btn.active,
.lang-switcher .lang-btn[aria-pressed="true"] {
  background: var(--color-brand-primary, #E53935);
  color: #ffffff;
}

.lang-switcher__option:hover:not(.lang-switcher__option--active),
.lang-switcher .lang-btn:hover:not(.active) {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

/* ── Theme Toggle ── */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: 0.75rem;
}

.theme-toggle__option {
  background: none;
  border: 1px solid var(--border-primary);
  border-radius: 50%;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 220ms ease;
  color: var(--text-secondary);
}

.theme-toggle__option:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.theme-toggle__option[aria-checked="true"],
.theme-toggle__option.active {
  background: var(--color-brand-primary, #E53935);
  border-color: var(--color-brand-primary, #E53935);
  color: #ffffff;
}

/* ── Mobile Menu Toggle ── */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.navbar__toggle-icon,
.navbar__toggle-icon::before,
.navbar__toggle-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.25s, background 0.25s;
}

.navbar__toggle-icon {
  position: relative;
}

.navbar__toggle-icon::before,
.navbar__toggle-icon::after {
  content: '';
  position: absolute;
  left: 0;
}

.navbar__toggle-icon::before { top: -7px; }
.navbar__toggle-icon::after { top: 7px; }

/* Toggle Active State (X animation) */
.navbar__toggle[aria-expanded="true"] .navbar__toggle-icon {
  background: transparent;
}

.navbar__toggle[aria-expanded="true"] .navbar__toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.navbar__toggle[aria-expanded="true"] .navbar__toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ── Mobile Menu Panel ── */
.mobile-menu {
  display: none;
}

.mobile-menu.active {
  display: flex;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--nav-bg, var(--bg-primary));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1rem;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-start;
  border-bottom: 1px solid var(--border-primary);
  z-index: 899;
}

.mobile-menu .navbar__link {
  color: var(--text-primary);
  padding: 0.7rem 1rem;
  border-radius: 6px;
  font-size: 0.95rem;
  width: 100%;
  border-bottom: none;
  opacity: 0.85;
}

.mobile-menu .navbar__link:hover {
  background: var(--bg-secondary);
  color: var(--color-brand-primary, #E53935);
  opacity: 1;
}

/* ── FAQ Scroll Offset ── */
#faq {
  scroll-margin-top: 80px;
}

/* ── Skip Link ── */
.skip-link {
  position: absolute;
  top: -40px;
  left: 1rem;
  background: var(--color-brand-primary, #E53935);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  z-index: 9999;
  transition: top 0.2s;
  text-decoration: none;
}

.skip-link:focus {
  top: 0.5rem;
}

/* ── Screen Reader Only ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Progress Bar ── */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--color-brand-primary, #E53935);
  z-index: 999;
  width: 0;
  transition: width 100ms linear;
}

/* ── Back to Top ── */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 998;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-primary);
  border-radius: 50%;
  background: var(--bg-primary);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-brand-primary, #E53935);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===========================
   MOBILE RESPONSIVE
   =========================== */

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

  .navbar__toggle {
    display: flex;
  }

  .lang-switcher {
    margin-left: 0;
    margin-top: 0.4rem;
    align-self: flex-start;
  }

  .theme-toggle {
    margin-left: 0;
    margin-top: 0.5rem;
  }
}