/* ═══════════════════════════════════════════════════
   Navigation — shared across all pages
═══════════════════════════════════════════════════ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251,247,245,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition), background var(--transition);
  /* overflow-x: hidden removed — it clips position:fixed .nav-mobile in browsers with backdrop-filter */
}
[data-theme="dark"] .site-header {
  background: rgba(26,16,24,0.92);
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100px;
  gap: var(--space-8);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.nav-logo img {
  height: 90px;
  width: auto;
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}
.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  background: var(--rose-pale);
}
[data-theme="dark"] .nav-links a:hover,
[data-theme="dark"] .nav-links a.active {
  background: rgba(176,80,112,0.15);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}
.nav-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
  background: none;
  border: none;
}
.nav-dropdown-toggle:hover { color: var(--color-primary); background: var(--rose-pale); }
.nav-dropdown-toggle svg { transition: transform 0.2s var(--ease); }
.nav-dropdown.open .nav-dropdown-toggle svg { transform: rotate(180deg); }

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  min-width: 220px;
  box-shadow: var(--shadow-lg);
  z-index: 200;
}
.nav-dropdown.open .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: background var(--transition), color var(--transition);
}
.nav-dropdown-menu a:hover { background: var(--rose-pale); color: var(--color-primary); }
.nav-dropdown-menu a small {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: 2px;
}

/* Nav right */
.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* Theme toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition), background var(--transition);
}
.theme-toggle:hover { color: var(--color-primary); background: var(--rose-pale); }

/* Mobile hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s var(--ease);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
.nav-mobile {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  padding: var(--space-8);
  overflow-y: auto;
  z-index: 9999;
  flex-direction: column;
  gap: var(--space-2);
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border-bottom: 1px solid var(--color-border);
}
.nav-mobile a:hover { color: var(--color-primary); background: var(--rose-pale); }
.nav-mobile .btn { margin-top: var(--space-4); width: 100%; justify-content: center; }

@media (max-width: 768px) {
  .nav-links, .nav-dropdown { display: none !important; }
  .nav-right { display: none !important; }
  .nav-hamburger { display: flex !important; }
  .nav-inner {
    height: 72px;
    gap: 0;
    padding-inline: 1rem;
  }
  .nav-logo {
    flex: 1;
    min-width: 0;
  }
  .nav-logo img {
    height: 56px;
    width: auto;
    max-width: 220px;
  }
  .nav-mobile { top: 72px; }
}