/* ============================================
   Navigation Bar
   ============================================ */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background-color: var(--bg-white);
  box-shadow: var(--shadow-nav);
  z-index: var(--z-header);
  display: flex;
  align-items: center;
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* --- Logo --- */

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.nav-logo svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.nav-logo-text {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}

/* --- Desktop Nav Links --- */

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: var(--text-nav);
  font-weight: 500;
  color: var(--text-primary);
  padding: 8px 0;
  position: relative;
  transition: color var(--duration-fast) ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--brand-orange);
  transform: scaleX(0);
  transition: transform var(--duration-normal) var(--ease-standard);
}

.nav-link:hover,
.nav-link.active {
  color: var(--brand-orange);
}

.nav-link.active::after,
.nav-link:hover::after {
  transform: scaleX(1);
}

/* --- Right Side --- */

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-lang {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-md);
  transition: background-color var(--duration-fast) ease;
}

.nav-lang:hover {
  background-color: var(--bg-gray);
}

.nav-lang svg {
  width: 16px;
  height: 16px;
}

/* --- Hamburger (mobile) --- */

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 1px;
  transition: all 0.3s var(--ease-standard);
}

/* --- Mobile Menu --- */

.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 80%;
  max-width: 320px;
  background-color: var(--bg-white);
  z-index: calc(var(--z-header) + 10);
  padding: 80px 32px 32px;
  display: flex;
  flex-direction: column;
}

.mobile-menu-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: none;
  border: none;
}

.mobile-menu-close svg {
  width: 24px;
  height: 24px;
  stroke: var(--text-primary);
  stroke-width: 2;
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-grow: 1;
}

.mobile-menu-links a {
  font-size: 24px;
  font-weight: 500;
  color: var(--text-primary);
  padding: 12px 0;
  transition: color var(--duration-fast) ease, transform var(--duration-fast) ease;
}

.mobile-menu-links a:hover,
.mobile-menu-links a.active {
  color: var(--brand-orange);
  transform: translateX(4px);
}

.mobile-menu-cta {
  margin-top: 32px;
}

.mobile-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0,0,0,0.4);
  z-index: calc(var(--z-header) + 5);
}

/* --- Responsive --- */

@media (max-width: 767px) {
  .nav-links,
  .nav-right .nav-lang {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
  
  .nav-right {
    gap: 8px;
  }
  
  .nav-right .btn-sm {
    padding: 8px 16px;
    font-size: 13px;
  }
}

@media (min-width: 768px) {
  .mobile-menu,
  .mobile-backdrop {
    display: none !important;
  }
}