/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding-block: var(--space-5);
  background: linear-gradient(to bottom, rgba(237, 234, 229, .55) 60%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 800;
  font-size: 1.25rem;
  flex-shrink: 0;
}
.brand__wordmark { height: 50px; width: auto; }
.brand__icon { height: 60px; width: 60px; }

/* ===== Liquid-glass horizontal nav ===== */
.glass-nav { flex: 1; display: flex; justify-content: center; min-width: 0; }
.glass-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(255, 255, 255, .5);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, .65);
  border-radius: var(--radius-full);
  padding: 7px;
  box-shadow: 0 8px 32px rgba(34, 30, 27, .10), inset 0 1px 0 rgba(255, 255, 255, .85);
}
.glass-nav__list > li { position: relative; }
.glass-nav__link {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: var(--fs-body);
  color: var(--color-ink-soft);
  transition: background var(--dur-fast) var(--ease-standard), color var(--dur-fast) var(--ease-standard);
  white-space: nowrap;
}
.glass-nav__link:hover, .glass-nav__link:focus-visible {
  background: rgba(34, 30, 27, .07);
  color: var(--color-ink);
}
.glass-nav__link[aria-current="page"],
.has-dropdown.is-active-group > .glass-nav__link {
  color: var(--color-blue-dark);
  background: var(--color-blue-tint);
}
.glass-nav__link .chevron { transition: transform var(--dur-fast) var(--ease-standard); }
.has-dropdown:hover .chevron,
.has-dropdown.is-open .chevron { transform: rotate(180deg); }

.glass-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 250px;
  background: rgba(255, 255, 255, .78);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, .7);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, .9);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 1px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-standard), transform var(--dur-base) var(--ease-standard), visibility var(--dur-base);
  z-index: 120;
}
.has-dropdown:hover .glass-dropdown,
.has-dropdown:focus-within .glass-dropdown,
.has-dropdown.is-open .glass-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.glass-dropdown a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-size: var(--fs-body);
  font-weight: 500;
  color: var(--color-ink-soft);
  transition: background var(--dur-fast), color var(--dur-fast);
}
.glass-dropdown a:hover, .glass-dropdown a:focus-visible {
  background: var(--color-blue-tint);
  color: var(--color-blue-dark);
}
.glass-dropdown a svg { flex-shrink: 0; }

.site-header__actions { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }

/* Mobile hamburger toggle (small screens only) */
.nav-toggle-mobile {
  display: none;
  position: relative;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, .65);
  background: rgba(255, 255, 255, .5);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  place-items: center;
  flex-shrink: 0;
}
.nav-toggle-mobile__bars { position: relative; width: 22px; height: 16px; }
.nav-toggle-mobile__bars span {
  position: absolute;
  right: 0; left: 0;
  height: 2px;
  border-radius: var(--radius-full);
  background: var(--color-ink);
  transition: transform var(--dur-base) var(--ease-smooth), opacity var(--dur-base) var(--ease-smooth), top var(--dur-base) var(--ease-smooth);
}
.nav-toggle-mobile__bars span:nth-child(1) { top: 0; }
.nav-toggle-mobile__bars span:nth-child(2) { top: 7px; }
.nav-toggle-mobile__bars span:nth-child(3) { top: 14px; }
.nav-toggle-mobile[aria-expanded="true"] .nav-toggle-mobile__bars span:nth-child(1) { top: 7px; transform: rotate(45deg); }
.nav-toggle-mobile[aria-expanded="true"] .nav-toggle-mobile__bars span:nth-child(2) { opacity: 0; }
.nav-toggle-mobile[aria-expanded="true"] .nav-toggle-mobile__bars span:nth-child(3) { top: 7px; transform: rotate(-45deg); }

.mobile-nav {
  position: absolute;
  inset-inline: var(--space-4);
  top: 100%;
  margin-top: var(--space-2);
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, .7);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: none;
  flex-direction: column;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  padding-inline: var(--space-3);
  transition: max-height var(--dur-slow) var(--ease-smooth), opacity var(--dur-base) var(--ease-standard);
}
.mobile-nav.is-open { max-height: min(75vh, 640px); opacity: 1; padding-block: var(--space-3); overflow-y: auto; }
.mobile-nav a, .mobile-nav__accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: var(--fs-body);
  color: var(--color-ink);
  background: none;
  border: none;
  text-align: right;
  font-family: inherit;
}
.mobile-nav a:hover, .mobile-nav__accordion-trigger:hover { background: rgba(34, 30, 27, .06); }
.mobile-nav__accordion-trigger svg { transition: transform var(--dur-fast); }
.mobile-nav__accordion-trigger[aria-expanded="true"] svg { transform: rotate(180deg); }
.mobile-nav__accordion {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--dur-base) var(--ease-standard);
  padding-right: var(--space-4);
}
.mobile-nav__accordion.is-open { max-height: 400px; overflow-y: auto; }
.mobile-nav__accordion a { font-weight: 500; font-size: var(--fs-small); color: var(--color-ink-soft); }

@media (max-width: 900px) {
  .glass-nav, .site-header__actions .btn-primary { display: none; }
  .nav-toggle-mobile { display: grid; }
  .mobile-nav { display: flex; }
}

/* ===== Sections ===== */
.section { padding-block: var(--space-9); }
.section.is-alt { background: var(--color-bg-alt); }
.section-head {
  max-width: 640px;
  margin-bottom: var(--space-7);
}
.section-head h2 { font-size: var(--fs-h2); margin-top: var(--space-3); }
.section-head p { margin-top: var(--space-3); font-size: var(--fs-body-lg); color: var(--color-ink-soft); }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-nav-bg);
  color: rgba(245, 243, 239, .7);
  padding-block: var(--space-8) var(--space-6);
}
.site-footer__grid {
  display: grid;
  gap: var(--space-7);
  grid-template-columns: 1.3fr 1fr;
}
.site-footer h3 {
  color: #fff;
  font-size: var(--fs-small);
  letter-spacing: .04em;
  margin-bottom: var(--space-4);
}
.site-footer__brand {
  display: inline-flex;
  align-items: center;
  margin-bottom: var(--space-4);
}
.site-footer__logo { height: 32px; width: auto; }
.site-footer__desc { font-size: var(--fs-small); line-height: var(--lh-loose); max-width: 32ch; }
.site-footer__list { display: flex; flex-direction: column; gap: var(--space-2); }
.site-footer__list a { font-size: var(--fs-small); transition: color var(--dur-fast); }
.site-footer__list a:hover { color: #fff; }
.site-footer__bottom {
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid rgba(255, 255, 255, .1);
  font-size: var(--fs-micro);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
}

@media (max-width: 560px) {
  .site-footer__grid { grid-template-columns: 1fr; }
}

/* page fade wrapper used by JS fallback transitions */
.page-fade { min-height: 100vh; }