/* ==========================================================================
   Navigation — sticky bar, sliding active indicator, mobile menu
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 6px 20px -16px rgba(23, 19, 15, 0.35);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  height: var(--nav-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  width: 32px;
  height: 32px;
  transition: transform var(--t-med) var(--ease);
}

.brand:hover .brand-mark {
  transform: rotate(-8deg);
}

.brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
}

/* Desktop links + sliding indicator */
.nav-links-wrap {
  position: relative;
}

.nav-links {
  display: flex;
  gap: var(--s-1);
}

.nav-links a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--r-xs);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--ink-2);
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.nav-links a:hover {
  color: var(--ink);
  background: var(--cream);
}

.nav-links a.is-active {
  color: var(--ink);
}

.nav-indicator {
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 2px;
  width: 0;
  border-radius: 2px;
  background: var(--orange);
  opacity: 0;
  transition: transform 0.4s var(--ease), width 0.4s var(--ease), opacity var(--t-fast) var(--ease);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--s-1);
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--white);
}

.nav-toggle-bar {
  position: absolute;
  left: 12px;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform var(--t-med) var(--ease), top var(--t-med) var(--ease);
}

.nav-toggle-bar:nth-of-type(2) {
  top: 17px;
}

.nav-toggle-bar:nth-of-type(3) {
  top: 25px;
}

.site-header.is-open .nav-toggle-bar:nth-of-type(2) {
  top: 21px;
  transform: rotate(45deg);
}

.site-header.is-open .nav-toggle-bar:nth-of-type(3) {
  top: 21px;
  transform: rotate(-45deg);
}

.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 24px 40px -24px rgba(23, 19, 15, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--t-med) var(--ease), transform var(--t-med) var(--ease),
    visibility 0s linear var(--t-med);
}

.site-header.is-open .mobile-menu {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity var(--t-med) var(--ease), transform var(--t-med) var(--ease), visibility 0s;
}

.mobile-menu-links {
  display: grid;
  padding-block: var(--s-1) var(--s-3);
}

.mobile-menu-links a:not(.btn) {
  display: flex;
  align-items: center;
  min-height: 56px;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.mobile-menu-cta {
  padding-top: var(--s-3);
}

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

  .nav-toggle {
    display: block;
  }
}

@media (min-width: 901px) {
  .mobile-menu {
    display: none;
  }
}

@media (max-width: 480px) {
  .nav-cta {
    display: none;
  }
}