:root {
  --taa-header-height: 72px;
}

#nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nb);
  min-height: var(--taa-header-height);
  border-bottom: 1px solid oklch(0.88 0.008 78);
  box-shadow: 0 1px 3px oklch(0 0 0 / 0.05);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  min-height: var(--taa-header-height);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-logo {
  font-family: var(--hfont);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1;
  color: var(--nl);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-left: auto;
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

.nav-links li {
  position: relative;
}

.nav-links li a {
  display: inline-flex;
  align-items: center;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1;
  padding: 0;
  border-radius: 0;
  transition: color 0.15s ease;
  white-space: nowrap;
}

.nav-links li a:hover,
.nav-links li a:focus-visible {
  color: var(--text-dark);
  background: transparent;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-dropdown-toggle::after {
  content: "▾";
  font-size: 0.7rem;
  color: currentColor;
}

.nav-dropdown-menu {
  list-style: none;
  margin: 0;
  padding: 0.4rem;
  position: absolute;
  top: calc(100% + 0.85rem);
  left: -0.75rem;
  min-width: 220px;
  background: var(--cbg);
  border: 1px solid var(--cbor);
  border-radius: 0.85rem;
  box-shadow: 0 16px 40px oklch(0 0 0 / 0.14);
  display: none;
  z-index: 1001;
}

.nav-dropdown::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 0.9rem;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  display: block;
}

.nav-dropdown-menu li a {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: 0.6rem;
  color: var(--text-body);
  font-size: 0.875rem;
  line-height: 1.2;
}

.nav-dropdown-menu li a:hover,
.nav-dropdown-menu li a:focus-visible {
  background: var(--acl);
  color: var(--text-dark);
}

.nav-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 2.25rem;
  padding: 0 1rem;
  border-radius: 0.5rem;
  background: var(--bb);
  color: var(--bt) !important;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
  box-shadow: 0 1px 2px oklch(0 0 0 / 0.12);
  transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.nav-cta a:hover,
.nav-cta a:focus-visible {
  background: var(--bbd) !important;
  box-shadow: 0 4px 12px oklch(0 0 0 / 0.12);
  transform: translateY(-1px);
}

.nav-hamburger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--cbor);
  border-radius: 0.5rem;
  background: var(--cbg);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  box-shadow: 0 1px 2px oklch(0 0 0 / 0.06);
}

.nav-hamburger span {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-hamburger span + span {
  margin-top: 4px;
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

#nav-drawer {
  display: none;
  position: fixed;
  top: calc(var(--taa-header-height) + 1px);
  left: 0;
  right: 0;
  background: var(--nb);
  z-index: 999;
  padding: 1rem;
  border-bottom: 1px solid oklch(0.88 0.008 78);
  box-shadow: 0 12px 30px oklch(0 0 0 / 0.12);
}

#nav-drawer.open {
  display: block;
}

#nav-drawer ul {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 1280px;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

#nav-drawer a {
  display: block;
  color: var(--text-body);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.75rem 0.85rem;
  border-radius: 0.7rem;
  transition: background 0.15s ease, color 0.15s ease;
}

#nav-drawer a:hover,
#nav-drawer a:focus-visible {
  background: var(--acl);
  color: var(--text-dark);
}

#nav-drawer .drawer-login a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.45rem;
  background: var(--bb);
  color: var(--bt);
  font-weight: 600;
  box-shadow: 0 1px 2px oklch(0 0 0 / 0.12);
}

#nav-drawer .drawer-login a:hover,
#nav-drawer .drawer-login a:focus-visible {
  background: var(--bbd);
  color: var(--bt);
}

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

  .nav-hamburger {
    display: inline-flex;
  }
}