/* ============================================================
   NAVIGATION — Canon Tahoe Glass (Unified, Clean, Modern)
   ============================================================ */

/* Single source of truth for nav height */
:root {
  --nav-height: 64px;
}

/* ---------------------------------------
   HEADER WRAPPER
   --------------------------------------- */
#site-header {
  position: relative;
  z-index: 900;
}

/* ---------------------------------------
   FIXED NAV BAR (Glass)
   --------------------------------------- */
.nav-main {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;

  height: var(--nav-height);

  display: flex;
  align-items: center;
  justify-content: center;

  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);

  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);

  z-index: 1000; /* above hero + search */
}

/* ---------------------------------------
   DESKTOP NAV LINKS
   --------------------------------------- */
.nav-center ul {
  list-style: none;
  display: flex;
  gap: 2.2rem;
  margin: 0;
  padding: 0;
}

.nav-center a {
  color: var(--text-color);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: opacity 0.25s ease;
}

.nav-center a:hover {
  opacity: 0.7;
}

/* ============================================================
   THEME TOGGLE — Unified (Desktop + Mobile)
   ============================================================ */

/* One button only: #theme-toggle, inside nav on the right */
#theme-toggle {
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);

  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;

  display: flex;
  align-items: center;
  justify-content: center;

  z-index: 1100; /* above nav bar glass */
}

#theme-toggle svg {
  width: 26px;
  height: 26px;
  fill: currentColor;
  color: var(--text-color);
  isolation: isolate;
  mix-blend-mode: normal;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

/* Slight hover lift (desktop only) */
@media (hover: hover) {
  #theme-toggle:hover svg {
    opacity: 0.85;
    transform: translateY(-1px);
  }
}

/* ============================================================
   MOBILE — Unified Toggle + Hamburger
   ============================================================ */

/* Default: hamburger hidden on desktop */
#hamburger {
  display: none;
}

@media (max-width: 767px) {

  :root {
    --nav-height: 88px; /* more room for hamburger + toggle */
  }

  .nav-main {
    height: var(--nav-height);
    align-items: center;
    justify-content: center;
  }

  /* Hamburger: centred in the bar */
  #hamburger {
    display: flex;
    flex-direction: column;
    justify-content: space-between;

    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    width: 32px;
    height: 24px;
    padding: 0;

    background: none;
    border: none;
    cursor: pointer;

    z-index: 1200; /* above nav-center ul */
  }

  #hamburger span {
    width: 100%;
    height: 3px;
    border-radius: 999px;
    background: var(--hamburger-line);
  }

  /* Mobile toggle — same button, but snug to right edge */
  #theme-toggle {
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
  }

  /* Hide desktop nav links on mobile */
  .nav-center {
    display: none !important;
    pointer-events: none !important;
  }
}

/* ============================================================
   MOBILE MENU — Smooth Slide
   ============================================================ */

#mobile-menu {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;

  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;

  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--nav-border);

  transform: translateY(-30px);
  max-height: 0;
  overflow: hidden;

  transition:
    opacity 0.45s ease,
    transform 0.45s cubic-bezier(.16,1,.3,1),
    max-height 0.55s cubic-bezier(.33,1,.68,1);

  text-align: center;
  z-index: 950; /* above hero + search, under nav + toggle */
}

#mobile-menu.open {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;

  transform: translateY(0);
  max-height: 520px;
}

#mobile-menu ul {
  list-style: none;
  padding: 0.5rem 0 1rem 0;
  margin: 0;
}

#mobile-menu li {
  padding: 0.9rem 1.6rem;
}

#mobile-menu a {
  color: var(--text-color);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 500;
}

/* iOS heading alignment override */
.page-content > h1 {
  text-align: center !important;
  margin-left: auto !important;
  margin-right: auto !important;
  width: 100%;
}