/* Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-interactive);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  padding-block: var(--space-3);
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}

.nav-logo img {
  height: 52px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin-left: auto;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-md);
  text-decoration: none;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
  background: color-mix(in oklab, var(--color-accent) 8%, transparent);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-link--has-dropdown svg {
  transition: transform var(--transition-fast);
}

.nav-dropdown:hover .nav-link--has-dropdown svg,
.nav-dropdown:focus-within .nav-link--has-dropdown svg {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 240px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  /* Invisible padding at top bridges the gap between nav link and menu */
  padding-top: calc(var(--space-2) + 8px);
  margin-top: 0;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%);
}

.dropdown-menu a {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.dropdown-menu a:hover {
  color: var(--color-accent);
  background: color-mix(in oklab, var(--color-accent) 8%, transparent);
}

/* Nav actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.nav-phone {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}

.nav-phone:hover {
  color: var(--color-accent);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
}

.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-interactive), opacity var(--transition-interactive);
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

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

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    inset: 0;
    top: 72px;
    background: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-6);
    margin: 0;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    overflow-y: auto;
    z-index: 99;
    border-top: 1px solid var(--color-border);
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-links li { width: 100%; }
  .nav-link { padding: var(--space-4) var(--space-2); font-size: var(--text-base); border-radius: 0; border-bottom: 1px solid var(--color-divider); }

  .dropdown-menu {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--color-surface-2);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    border-radius: 0;
    display: none;
  }
  .nav-dropdown.open .dropdown-menu { display: block; }

  .nav-hamburger { display: flex; }
  .nav-actions .btn { display: none; }
}

/* ── White logo on navy header/footer ─────────────────────────────── */
.site-header {
  background: var(--color-primary) !important;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.nav-logo img {
  filter: brightness(0) invert(1);
}

.nav-link {
  color: rgba(255,255,255,0.85);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
  background: rgba(43,181,200,0.12);
}

.nav-link--has-dropdown svg path {
  stroke: rgba(255,255,255,0.7);
}

.nav-phone {
  color: rgba(255,255,255,0.85);
}

.nav-phone:hover {
  color: var(--color-accent);
}

.theme-toggle {
  color: rgba(255,255,255,0.7);
}

.theme-toggle:hover {
  color: #fff;
}

.nav-hamburger span {
  background: rgba(255,255,255,0.85);
}

/* Dropdown on navy header */
.dropdown-menu {
  background: var(--color-primary);
  border-color: rgba(255,255,255,0.1);
}

.dropdown-menu a {
  color: rgba(255,255,255,0.8);
}

.dropdown-menu a:hover {
  color: var(--color-accent);
  background: rgba(43,181,200,0.1);
}

/* Fix theme-toggle appearance on navy background */
.site-header .theme-toggle {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.75);
}

.site-header .theme-toggle:hover {
  background: rgba(255,255,255,0.14);
  border-color: rgba(255,255,255,0.3);
  color: #fff;
}