/* ═══════════════════════════════════════════════════════════════
   SOLONAS Header — Apple.com frosted glass nav
   ═══════════════════════════════════════════════════════════════ */

.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(var(--header-blur));
  -webkit-backdrop-filter: saturate(180%) blur(var(--header-blur));
  border-bottom: 1px solid var(--color-border);
}

@media (prefers-color-scheme: dark) {
  .site-nav {
    background: rgba(29, 29, 31, 0.72);
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }
}

.site-nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-5);
}

/* ── Logo ──────────────────────────────────────────────── */
.site-nav__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.site-nav__logo:hover { text-decoration: none; opacity: 0.8; }

.site-nav__logo img {
  width: 40px;
  height: 40px;
  border-radius: 9px;
}

/* ── Nav links ─────────────────────────────────────────── */
.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav__links a {
  color: var(--color-text);
  font-size: var(--text-xs);
  font-weight: 400;
  text-decoration: none;
  opacity: 0.8;
  transition: opacity var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.site-nav__links a:hover,
.site-nav__links a[aria-current="page"] {
  opacity: 1;
  text-decoration: none;
}

/* ── Dropdown submenus (Apple.com full-width flyout) ──── */
.has-submenu {
  position: static;
  display: flex;
  align-items: center;
  height: var(--header-h);
}

.nav-parent {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
  font-family: inherit;
  font-size: var(--text-xs);
  font-weight: 400;
  opacity: 0.8;
  transition: opacity var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  padding: 0;
  line-height: inherit;
}

.nav-parent:hover,
.has-submenu.open .nav-parent {
  opacity: 1;
}

/* Full-width flyout panel */
.submenu {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  list-style: none;
  margin: 0;
  padding: var(--space-5) 0 var(--space-6);
  background: rgba(251, 251, 253, 0.97);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.3s var(--ease-out),
              opacity 0.2s var(--ease-out),
              visibility 0s 0.3s;
  z-index: 999;
}

.has-submenu.open .submenu {
  transform: scaleY(1);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: transform 0.3s var(--ease-out),
              opacity 0.2s var(--ease-out),
              visibility 0s 0s;
}

.submenu li {
  margin: 0;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--space-5);
}

.submenu a {
  display: block;
  padding: 6px 0;
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease-out);
}

.submenu a:hover {
  color: var(--color-text);
  text-decoration: none;
}

/* Backdrop overlay when dropdown is open */
.nav-backdrop {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-out),
              visibility 0s 0.3s;
}

.nav-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 0.3s var(--ease-out),
              visibility 0s 0s;
}

@media (prefers-color-scheme: dark) {
  .submenu {
    background: rgba(29, 29, 31, 0.97);
    border-top-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  }

  .submenu a {
    color: var(--color-text-tertiary);
  }

  .submenu a:hover {
    color: #f5f5f7;
  }

  .nav-backdrop {
    background: rgba(0, 0, 0, 0.5);
  }
}

/* ── Hamburger toggle ──────────────────────────────────── */
.site-nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

.site-nav__toggle-bar {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-normal) var(--ease-out);
  transform-origin: center;
}

/* Animated X state */
.site-nav__toggle.is-active .site-nav__toggle-bar:first-child {
  transform: translateY(3.25px) rotate(45deg);
}
.site-nav__toggle.is-active .site-nav__toggle-bar:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

/* ── Mobile nav (Apple.com style) ─────────────────────── */
@media (max-width: 734px) {
  .site-nav__toggle { display: flex; }

  .site-nav__links {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: auto;
    max-height: calc(100vh - var(--header-h));
    z-index: 9999;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    padding: 0;
    gap: 0;
    background: #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.35s var(--ease-out),
                opacity 0.3s var(--ease-out),
                visibility 0s 0.35s;
    pointer-events: none;
  }

  .site-nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.35s var(--ease-out),
                opacity 0.3s var(--ease-out),
                visibility 0s 0s;
  }

  .site-nav__links a {
    display: block;
    font-size: var(--text-lg);
    font-weight: 600;
    opacity: 1;
    color: #1d1d1f;
    padding: 18px var(--space-8);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    text-decoration: none;
    transition: background var(--duration-fast) var(--ease-out);
  }

  .site-nav__links a:hover,
  .site-nav__links a:active {
    background: rgba(0, 0, 0, 0.04);
    text-decoration: none;
  }

  .site-nav__links > a:first-child,
  .site-nav__links > .has-submenu:first-child {
    border-top: 1px solid rgba(0, 0, 0, 0.08);
  }

  /* Mobile dropdown overrides */
  .has-submenu {
    position: static;
    display: block;
    height: auto;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  }

  .nav-parent {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    font-size: var(--text-lg);
    font-weight: 600;
    color: #1d1d1f;
    padding: 18px var(--space-8);
    opacity: 1;
  }

  .nav-parent::after {
    content: '';
    width: 8px;
    height: 8px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg);
    transition: transform 0.25s var(--ease-out);
    flex-shrink: 0;
    opacity: 0.4;
  }

  .has-submenu.open .nav-parent::after {
    transform: rotate(-135deg);
  }

  .submenu {
    position: static;
    transform: none;
    min-width: 0;
    background: rgba(0, 0, 0, 0.02);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: max-height 0.3s var(--ease-out);
  }

  .has-submenu.open .submenu {
    max-height: 400px;
    transform: none;
  }

  .submenu a {
    padding: 14px var(--space-8) 14px calc(var(--space-8) + 16px);
    font-size: var(--text-base);
    font-weight: 400;
    color: #1d1d1f;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  }

  .submenu li:last-child a {
    border-bottom: none;
  }

  @media (prefers-color-scheme: dark) {
    .site-nav__links {
      background: #1d1d1f;
      box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    }

    .site-nav__links a {
      color: #f5f5f7;
      border-bottom-color: rgba(255, 255, 255, 0.08);
    }

    .site-nav__links > a:first-child,
    .site-nav__links > .has-submenu:first-child {
      border-top-color: rgba(255, 255, 255, 0.08);
    }

    .site-nav__links a:hover,
    .site-nav__links a:active {
      background: rgba(255, 255, 255, 0.06);
    }

    .has-submenu {
      border-bottom-color: rgba(255, 255, 255, 0.08);
    }

    .nav-parent {
      color: #f5f5f7;
    }

    .submenu {
      background: rgba(255, 255, 255, 0.04);
    }

    .submenu a {
      color: #f5f5f7;
      border-bottom-color: rgba(255, 255, 255, 0.04);
    }
  }
}