/* Intee Brand - Global Multi-Page Navigation & Mobile Drawer */
:root {
  --nav-height: 72px;
  --topbar-height: 38px;
}

.top-announcement {
  background: linear-gradient(90deg, #111827 0%, #1f2937 50%, #111827 100%);
  color: #f3f4f6;
  font-size: 0.85rem;
  padding: 8px 16px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  letter-spacing: 0.2px;
}

.top-announcement strong {
  color: #60a5fa;
  font-weight: 700;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  padding: 0 24px;
  max-width: 1280px;
  margin: 0 auto;
}

.brand-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo-img {
  height: 42px;
  width: auto;
  object-fit: contain;
  transition: transform var(--transition-fast);
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.03);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 10px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #374151;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--brand-black);
  background-color: rgba(0, 0, 0, 0.04);
}

.nav-link.active {
  color: var(--accent-blue);
  background-color: rgba(37, 99, 235, 0.08);
  font-weight: 700;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 14px;
  right: 14px;
  height: 2px;
  background-color: var(--accent-blue);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-zalo-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  font-size: 0.88rem;
  font-weight: 700;
  color: #0284c7;
  background-color: #e0f2fe;
  border: 1px solid #bae6fd;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-zalo-pill:hover {
  background-color: #0284c7;
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-nav-quote {
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Mobile Hamburger Toggle */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  gap: 5px;
  z-index: 101;
}

.mobile-menu-btn span {
  width: 22px;
  height: 2px;
  background-color: var(--brand-black);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: #ffffff;
  z-index: 105;
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 24px;
}

.mobile-drawer.open {
  right: 0;
}

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 104;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.drawer-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-color);
}

.drawer-close-btn {
  background: none;
  border: none;
  font-size: 1.8rem;
  line-height: 1;
  color: #6b7280;
  cursor: pointer;
  padding: 4px;
}

.drawer-nav-list {
  list-style: none;
  padding: 18px 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-grow: 1;
  overflow-y: auto;
}

.drawer-nav-link {
  display: flex;
  align-items: center;
  padding: 12px 14px;
  font-size: 1rem;
  font-weight: 600;
  color: #1f2937;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.drawer-nav-link:hover,
.drawer-nav-link.active {
  background-color: rgba(37, 99, 235, 0.08);
  color: var(--accent-blue);
  font-weight: 700;
}

.drawer-footer {
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (max-width: 1024px) {
  .main-nav {
    display: none;
  }
  .nav-zalo-pill {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
}