/* ZigZag Recycling — site navigation (sticky header + click-to-call chip + mobile sheet). */

.site-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--dur-base) var(--ease-out),
    background var(--dur-base) var(--ease-out);
}

/*
 * Mobile only: drop `backdrop-filter` from the header.
 *
 * `backdrop-filter` creates a *containing block* for `position: fixed`
 * descendants. That means the mobile slide-in sheet (`.site-nav__nav`) gets
 * positioned relative to the 4.25rem-tall header instead of the viewport,
 * collapsing it to a thin strip at the top of the page. We keep the frosted
 * effect on desktop where the sheet isn't fixed, and fall back to a fully
 * opaque header on mobile so it still reads cleanly without the blur.
 */
@media (max-width: 767px) {
  .site-nav {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: var(--color-bg);
  }
}

.site-nav.is-scrolled {
  border-bottom-color: var(--color-border);
}

.site-nav__inner {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 4.25rem;
}

/* ---------------------------------------------------------------------------
 * Brand (logo lockup)
 * ------------------------------------------------------------------------- */

.site-nav__brand {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: inherit;
  text-decoration: none;
  letter-spacing: -0.01em;
}

/*
 * Brand mark: two interlocking Z's forming a lightning bolt.
 * Rendered as an inline SVG that inherits `color` via `currentColor`,
 * so the same glyph adapts to light surfaces (nav, default) and dark
 * surfaces (footer, see `.site-nav__brand-mark--on-dark`).
 */
.site-nav__brand-mark {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  line-height: 0;
}

.site-nav__brand-mark svg {
  display: block;
  width: 1.375rem;
  height: 1.75rem;
}

/* On dark backgrounds (footer, CTA strip) — flip to brand yellow. */
.site-nav__brand-mark--on-dark {
  color: var(--color-accent);
}

.site-nav__brand-text {
  font-family: var(--font-display);
  font-weight: 700;
}

/* ---------------------------------------------------------------------------
 * Right cluster: phone chip + toggle + nav
 * ------------------------------------------------------------------------- */

.site-nav__right {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-4);
}

.site-nav__phone {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0.5rem 0.875rem;
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
  transition:
    border-color var(--dur-base) var(--ease-out),
    background var(--dur-base) var(--ease-out);
}

.site-nav__phone:hover {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
}

.site-nav__phone:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.site-nav__phone-icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--color-accent);
}

/* Below 480 px, the phone chip collapses to icon-only (tap area still ≥44 px). */
@media (max-width: 479px) {
  .site-nav__phone-text {
    display: none;
  }
  .site-nav__phone {
    padding: 0.5rem;
    min-width: 44px;
    justify-content: center;
  }
}

/* ---------------------------------------------------------------------------
 * Nav (links + CTA)
 * ------------------------------------------------------------------------- */

.site-nav__nav {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-6);
}

.site-nav__links {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding-block: var(--space-2);
  color: inherit;
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms var(--ease-out);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link.is-active::after {
  transform: scaleX(1);
}

.site-nav__cta {
  flex: 0 0 auto;
}

/* ---------------------------------------------------------------------------
 * Hamburger toggle (mobile only)
 * ------------------------------------------------------------------------- */

.site-nav__toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: inherit;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.site-nav__toggle:hover {
  border-color: var(--color-border);
}

.site-nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: var(--radius-pill);
  transform-origin: center;
  transition:
    transform var(--dur-base) var(--ease-out),
    opacity var(--dur-fast) var(--ease-out);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-bar:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
}

@media (min-width: 768px) {
  .site-nav__toggle {
    display: none;
  }
}

/* ---------------------------------------------------------------------------
 * Body lock when mobile sheet is open
 * ------------------------------------------------------------------------- */

body.nav-open {
  overflow: hidden;
}

/* ---------------------------------------------------------------------------
 * Mobile: nav becomes a slide-in sheet from the right
 * ------------------------------------------------------------------------- */

@media (max-width: 767px) {
  .site-nav__nav {
    position: fixed;
    inset: 4.25rem 0 0 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: var(--space-6);
    padding: var(--space-8);
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    transform: translateX(100%);
    transition: transform var(--dur-base) var(--ease-out);
    will-change: transform;
    overflow-y: auto;
  }

  body.nav-open .site-nav__nav {
    transform: translateX(0);
  }

  .site-nav__links {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }

  .site-nav__link {
    display: block;
    padding-block: var(--space-3);
    font-size: var(--text-lg);
  }

  .site-nav__link::after {
    left: 0;
    right: auto;
    width: 1.5rem;
  }

  .site-nav__cta {
    width: 100%;
    margin-top: auto;
  }
}

/* ---------------------------------------------------------------------------
 * Reduced motion: skip the sheet slide + link underline transitions
 * ------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .site-nav,
  .site-nav__nav,
  .site-nav__toggle-bar,
  .site-nav__link,
  .site-nav__link::after,
  .site-nav__phone {
    transition: none;
  }
}