/* ==========================================================================
   Doxablox — Site Navigation
   Fades in after path selection. Quiet, minimal, keyboard-accessible.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Nav shell
   -------------------------------------------------------------------------- */
.site-nav {
  /* Fixed to top, full width */
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;

  /* Invisible until path chosen */
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition:
    opacity var(--nav-duration, 400ms) var(--easing-default),
    transform var(--nav-duration, 400ms) var(--easing-default);
}

/* Nav becomes visible once a path is active */
[data-path] .site-nav {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   Inner layout
   -------------------------------------------------------------------------- */
.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  gap: 2rem;
}

/* --------------------------------------------------------------------------
   Wordmark (small, left-anchored)
   -------------------------------------------------------------------------- */
.site-nav__wordmark {
  font-family: var(--font-brand);
  font-size: 1rem;
  color: var(--color-fg);
  text-decoration: none;
  letter-spacing: -0.03em;
  opacity: 0.7;
  white-space: nowrap;
  flex-shrink: 0;
  transition: opacity 200ms var(--easing-default);
}

.site-nav__wordmark:hover,
.site-nav__wordmark:focus-visible {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   Desktop link list
   -------------------------------------------------------------------------- */
.site-nav__links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  font-family: var(--font-body);
  font-size: 0.75rem;          /* small, quiet */
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-nav-link, #9E9A94);  /* warm gray */
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--easing-default);

  /* Focus ring */
  border-radius: 2px;
  outline-offset: 3px;
}

.site-nav__link:hover {
  color: var(--color-fg);
}

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

/* --------------------------------------------------------------------------
   Mobile menu button (hamburger)
   -------------------------------------------------------------------------- */
.site-nav__menu-btn {
  display: none;               /* hidden on desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-nav-link, #9E9A94);
  border-radius: 4px;
  transition: color 180ms var(--easing-default);
  line-height: 0;
}

.site-nav__menu-btn:hover,
.site-nav__menu-btn:focus-visible {
  color: var(--color-fg);
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Three-line hamburger icon drawn with pseudo-elements */
.site-nav__menu-icon {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  position: relative;
  transition: background 200ms var(--easing-default);
}

.site-nav__menu-icon::before,
.site-nav__menu-icon::after {
  content: '';
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  position: absolute;
  left: 0;
  transition:
    transform 200ms var(--easing-default),
    opacity 200ms var(--easing-default);
}

.site-nav__menu-icon::before { top: -5px; }
.site-nav__menu-icon::after  { top:  5px; }

/* Animate to × when open */
[aria-expanded="true"] .site-nav__menu-icon {
  background: transparent;
}
[aria-expanded="true"] .site-nav__menu-icon::before {
  transform: translateY(5px) rotate(45deg);
}
[aria-expanded="true"] .site-nav__menu-icon::after {
  transform: translateY(-5px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Mobile drawer
   -------------------------------------------------------------------------- */
.site-nav__mobile {
  overflow: hidden;
  max-height: 0;
  transition: max-height 300ms var(--easing-default);
  background: var(--color-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.site-nav__mobile[aria-hidden="false"] {
  max-height: 320px;
}

.site-nav__mobile-links {
  list-style: none;
  margin: 0;
  padding: 0.5rem 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.site-nav__mobile-links li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.site-nav__mobile-links .site-nav__link {
  display: block;
  padding: 0.75rem 0;
  font-size: 0.8125rem;
}

/* --------------------------------------------------------------------------
   Responsive: show hamburger, hide desktop links
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
  .site-nav__links {
    display: none;
  }

  .site-nav__menu-btn {
    display: block;
  }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .site-nav,
  .site-nav__link,
  .site-nav__wordmark,
  .site-nav__mobile,
  .site-nav__menu-icon,
  .site-nav__menu-icon::before,
  .site-nav__menu-icon::after {
    transition: none;
  }
}