/* ============================================================
   Yoga in the Grove — Navigation Component
   All nav styles live here so colour changes in page stylesheets
   cannot accidentally affect layout, positioning, or toggle logic.

   Load order: global.css → nav.css → [page].css
   ============================================================ */


/* ------------------------------------------------------------
   Nav bar — fixed strip at top of every page
   ------------------------------------------------------------ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);

  background-color: color-mix(in srgb, var(--warm-cream) 92%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--cream-dark);

  transition: background-color 0.4s ease, border-color 0.4s ease;
}

/* Dark variant — used on pages with dark hero sections */
.site-nav.nav--dark {
  background-color: color-mix(in srgb, var(--deep-forest) 90%, transparent);
  border-bottom-color: rgba(255,255,255,0.08);
}

.site-nav.nav--dark .nav-wordmark,
.site-nav.nav--dark .nav-links a {
  color: var(--warm-cream);
}

.site-nav.nav--dark .nav-links a::after {
  background-color: var(--ochre);
}


/* ------------------------------------------------------------
   Wordmark / Logo
   ------------------------------------------------------------ */
.nav-wordmark {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-style: italic;
  font-weight: 400;
  color: var(--deep-forest);
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: color 0.3s ease;
}

.nav-wordmark span {
  font-style: normal;
  font-weight: 600;
}

.nav-wordmark:hover {
  opacity: 0.75;
}


/* ------------------------------------------------------------
   Desktop nav links
   ------------------------------------------------------------ */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-links a {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  color: var(--warm-bark);
  text-transform: lowercase;
  position: relative;
  padding-bottom: 2px;
  transition: color 0.25s ease;
}

/* Underline grows in on hover */
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--ochre);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease;
}

.nav-links a:hover {
  color: var(--deep-forest);
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-links a[aria-current="page"] {
  font-weight: 400;
}

/* Dot separators between links */
.nav-links a + a::before {
  content: '·';
  position: absolute;
  left: calc(-1 * var(--space-md) / 2);
  transform: translateX(-50%);
  color: var(--sage-light);
  font-size: var(--text-base);
  pointer-events: none;
}

/* Keyboard focus ring */
.nav-links a:focus-visible,
.nav-toggle:focus-visible {
  outline: 2px solid var(--ochre);
  outline-offset: 3px;
  border-radius: 2px;
}


/* ------------------------------------------------------------
   Hamburger toggle — hidden on desktop, shown on mobile
   ------------------------------------------------------------ */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background-color: var(--warm-bark);
  transition: transform 0.3s ease, opacity 0.3s ease;
}


/* ------------------------------------------------------------
   Mobile dropdown — structure, positioning, and open/close logic
   IMPORTANT: Only edit colours below this block. The rules in
   this section control whether the dropdown is visible at all.
   ------------------------------------------------------------ */
@media (max-width: 800px) {

  /* backdrop-filter on .site-nav causes Android/WebKit to use the nav bar
     (72px tall) as the containing block for position:fixed children.
     top:72px and bottom:0 then resolve to the same point → zero height.
     Removing it restores the viewport as the containing block. */
  .site-nav {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .nav-toggle {
    display: flex;
  }

  /* Slide-in panel — hidden off the right edge until .is-open is added by JS */
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 99;
    flex-direction: column;
    justify-content: center;
    gap: 0.75rem;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  }

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

  .nav-links a {
    font-size: var(--text-lg);
  }

  /* Hide dot separators on mobile */
  .nav-links a + a::before {
    display: none;
  }


  /* ----------------------------------------------------------
     Mobile dropdown colours — safe to edit this section only
     ---------------------------------------------------------- */
  .nav-links {
    background-color: var(--warm-cream);
  }

  .nav-links a {
    color: var(--warm-bark);
  }

  .nav-links a:hover,
  .nav-links a:focus-visible {
    color: var(--ochre);
  }

}