.main-nav {
  border-top: 1px solid var(--color-border);
  background: var(--color-white);
  font-family: "Kanit", "Open Sans", sans-serif;
}

.nav-shell {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  flex: 1;
  align-items: center;
  gap: 16px;
}

.nav-toggle { display: none; }
.nav-list, .submenu { margin: 0; padding: 0; list-style: none; }
.nav-list { display: flex; justify-content: center; gap: 2px; }
.nav-list > li { position: relative; }
.nav-list a, .submenu-toggle { min-height: 52px; }
.nav-list a { display: flex; align-items: center; padding: 10px 15px; color: var(--color-ink); line-height: 1.22; text-align: center; text-decoration: none; }
.nav-list a .fa-solid { margin-inline-end: 6px; color: var(--color-primary-dark); font-size: .9em; }
.nav-list > li > a:hover, .nav-item-row > a:hover, .nav-list > li:focus-within > .nav-item-row > a { color: var(--color-primary-dark); }
.nav-item-row { display: flex; align-items: stretch; }
.submenu-toggle { display: none; width: 48px; border: 0; background: transparent; color: var(--color-primary-dark); font: inherit; font-size: 1.35rem; cursor: pointer; }
.submenu { position: absolute; top: 100%; left: 0; z-index: 20; display: none; width: min(420px, 92vw); border: 1px solid var(--color-border); border-radius: 0 0 var(--radius) var(--radius); background: var(--color-white); box-shadow: var(--shadow-soft); }
.submenu a { min-height: 44px; justify-content: flex-start; padding: 11px 14px; font-size: .95rem; text-align: left; }
.has-submenu:hover > .submenu, .has-submenu:focus-within > .submenu { display: block; }

.site-search { position: relative; display: flex; width: min(260px, 24vw); min-width: 210px; align-items: center; font-family: "Kanit", "Open Sans", sans-serif; }
.site-search input { width: 100%; min-width: 0; height: 38px; padding: 7px 10px; border: 1px solid var(--color-border); border-right: 0; border-radius: 5px 0 0 5px; color: var(--color-ink); font: inherit; }
.site-search button { flex: 0 0 auto; height: 38px; padding: 7px 12px; border: 1px solid var(--color-primary); border-radius: 0 5px 5px 0; background: var(--color-primary); color: var(--color-white); font: inherit; cursor: pointer; }
.site-search button:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); }

.search-results-panel { position: absolute; top: 100%; left: 0; right: 0; z-index: 50; max-height: 400px; margin-top: 4px; overflow-y: auto; border: 1px solid var(--color-border); border-radius: 0 0 var(--radius) var(--radius); background: var(--color-white); box-shadow: var(--shadow-soft); }
.search-results-panel[hidden] { display: none; }
.search-result-item { display: block; padding: 10px 14px; color: var(--color-ink); text-decoration: none; border-bottom: 1px solid var(--color-border); }
.search-result-item:last-child { border-bottom: 0; }
.search-result-item:hover, .search-result-item:focus { background: var(--color-panel); color: var(--color-primary-dark); }
.search-result-title { margin-bottom: 4px; font-size: .95rem; font-weight: 600; }
.search-result-snippet { display: -webkit-box; overflow: hidden; color: var(--color-muted); font-size: .85rem; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.search-no-results { padding: 14px; color: var(--color-muted); text-align: center; font-size: .95rem; }
.nav-list a[aria-current="page"] { color: var(--color-primary); font-weight: 600; }

@media (max-width: 760px) {
  .main-nav { position: sticky; top: 0; z-index: 40; }
  .nav-shell { display: grid; grid-template-columns: 112px minmax(0, 1fr); min-height: 60px; align-items: center; gap: 8px; }
  .nav-toggle { display: inline-flex; min-width: 0; min-height: 48px; align-items: center; justify-content: center; gap: 10px; border: 1px solid var(--color-primary); border-radius: 5px; background: var(--color-primary); color: var(--color-white); font: inherit; cursor: pointer; }
  .site-search { width: 100%; min-width: 0; }
  .site-search input { height: 44px; padding-inline: 10px 8px; font-size: 16px; }
  .site-search button { width: 44px; height: 44px; padding: 0; font-size: 0; }
  .site-search button::before { color: currentColor; content: "\f002"; font-family: "Font Awesome 6 Free"; font-size: 1rem; font-weight: 900; }
  .search-results-panel { position: absolute; top: calc(100% + 4px); left: 0; right: 0; max-height: 360px; margin-top: 0; border-radius: var(--radius); }
  .nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after { display: block; width: 20px; height: 2px; border-radius: 2px; background: currentColor; }
  .nav-toggle__bars { position: relative; }
  .nav-toggle__bars::before, .nav-toggle__bars::after { position: absolute; left: 0; content: ""; }
  .nav-toggle__bars::before { top: -7px; }
  .nav-toggle__bars::after { top: 7px; }
  .nav-panel { position: fixed; display: flex; flex-direction: column; gap: 16px; top: 0; right: 0; bottom: 0; z-index: 45; width: min(88vw, 360px); max-width: calc(100vw - 24px); overflow-y: auto; padding: 78px 14px 20px; background: var(--color-white); box-shadow: -14px 0 34px rgba(0,0,0,.18); transform: translateX(110%); transition: transform 180ms ease; }
  .nav-panel::before { position: fixed; top: 0; right: 0; width: min(88vw,360px); height: 60px; background: var(--color-primary); content: ""; }
  .nav-panel.is-open { transform: translateX(0); }
  .nav-list { display: grid; gap: 8px; }
  .nav-list > li { overflow: hidden; border: 1px solid var(--color-border); border-radius: var(--radius); }
  .nav-list a { justify-content: flex-start; min-height: 48px; padding: 11px 12px; text-align: left; }
  .nav-item-row > a { flex: 1; }
  .submenu-toggle { display: inline-flex; align-items: center; justify-content: center; border-left: 1px solid var(--color-border); }
  .submenu-toggle[aria-expanded="true"] span:last-child { transform: rotate(45deg); }
  .submenu { position: static; display: none; width: 100%; border: 0; border-top: 1px solid var(--color-border); border-radius: 0; background: #fafafa; box-shadow: none; }
  .submenu.is-open { display: block; }
  .has-submenu:hover > .submenu { display: none; }
  .has-submenu:hover > .submenu.is-open, .has-submenu:focus-within > .submenu.is-open { display: block; }
}

@media (prefers-reduced-motion: reduce) { .nav-panel { transition: none; } }