.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 > 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: 0.95rem;
  text-align: left;
}

.has-submenu:hover > .submenu,
.has-submenu:focus-within > .submenu {
  display: block;
}

.site-search {
  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);
}

@media (max-width: 760px) {
  .main-nav {
    position: sticky;
    top: 0;
    z-index: 40;
  }

  .nav-shell {
    display: flex;
    min-height: 60px;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
  }

  .nav-toggle {
    display: inline-flex;
    min-width: 112px;
    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%;
    max-width: none;
    margin-top: 10px;
  }

  .site-search input {
    height: 42px;
    padding-inline: 10px 8px;
  }

  .site-search button {
    height: 42px;
    max-width: 64px;
    padding-inline: 10px;
    overflow: hidden;
    text-overflow: clip;
    white-space: nowrap;
  }

  .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, 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 {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
  }

  .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;
  }
}

/* Client-side search styles */
.site-search {
  position: relative;
}

.search-results-panel {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-top: 0;
  border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: var(--shadow-soft);
  z-index: 50;
  max-height: 400px;
  overflow-y: auto;
  margin-top: 4px;
}

.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 {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.search-result-snippet {
  font-size: 0.85rem;
  color: var(--color-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.search-no-results {
  padding: 14px;
  color: var(--color-muted);
  text-align: center;
  font-size: 0.95rem;
}

@media (max-width: 760px) {
  .search-results-panel {
    position: static;
    margin-top: 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
  }
}

/* Active state */
.nav-list a[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 600;
}