/* Sticky header, dropdown panels, mobile menu. */

.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(226, 217, 201, 0.5);
  transition:
    border-color var(--t-med) var(--ease),
    box-shadow var(--t-med) var(--ease);
}

/* Hairline + shadow appear only once the page has scrolled. */
.nav.is-stuck {
  border-bottom-color: rgba(226, 217, 201, 0.5);
  box-shadow: 0 6px 20px -14px rgba(20, 28, 52, 0.4);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: none;
}

.logo img {
  width: 120px;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-links > a,
.nav-drop > button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--nav-link);
  transition: color var(--t-fast) var(--ease);
}

.nav-links > a:hover,
.nav-drop > button:hover,
.nav-drop[data-open="true"] > button {
  color: var(--ink);
}

.nav-drop {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-drop > button svg {
  transition: transform var(--t-fast) var(--ease);
}

.nav-drop[data-open="true"] > button svg {
  transform: rotate(180deg);
}

.nav-panel {
  position: absolute;
  top: calc(100% + 18px);
  left: 50%;
  translate: -50% 0;
  min-width: 300px;
  padding: var(--sp-3);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--bone-card);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition:
    opacity var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease),
    visibility var(--t-fast);
}

.nav-drop[data-open="true"] .nav-panel {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.nav-panel a {
  display: block;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  transition: background-color var(--t-fast) var(--ease);
}

.nav-panel a:hover {
  background: rgba(21, 32, 59, 0.05);
}

.nav-panel strong {
  display: block;
  font-size: var(--fs-ui);
  font-weight: 700;
  color: var(--ink);
}

.nav-panel span {
  display: block;
  margin-top: 2px;
  font-size: var(--fs-xs);
  color: var(--muted);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--ink);
}

/* ---- Mobile menu ------------------------------------------------------- */

.mobile-menu {
  display: none;
  position: fixed;
  inset: var(--nav-h) 0 0;
  z-index: var(--z-menu);
  padding: var(--sp-5) var(--gutter) var(--sp-8);
  background: var(--bone);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.mobile-menu[data-open="true"] {
  display: block;
}

.mobile-menu > a:not(.btn) {
  display: block;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--ink);
}

.mm-acc {
  border-bottom: 1px solid var(--line);
}

.mm-acc > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 0;
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

.mm-acc > summary::-webkit-details-marker {
  display: none;
}

.mm-acc > summary::after {
  content: "";
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  rotate: 45deg;
  transition: rotate var(--t-fast) var(--ease);
}

.mm-acc[open] > summary::after {
  rotate: -135deg;
}

.mm-services {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding: 0 0 var(--sp-4) var(--sp-4);
}

.mm-services a {
  padding: 9px 0;
  font-size: var(--fs-ui);
  color: var(--muted);
}

.mm-group-title {
  margin-top: var(--sp-3);
  font-family: var(--mono);
  font-size: var(--fs-2xs);
  font-weight: 500;
  letter-spacing: var(--ls-lab);
  text-transform: uppercase;
  color: var(--ink);
}

.mm-group-title:first-child {
  margin-top: 0;
}

.mm-cta {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

body.menu-open {
  overflow: hidden;
}

/* ---- Responsive -------------------------------------------------------- */

@media (max-width: 1080px) {
  .nav-links {
    gap: 20px;
  }

  .nav-links > a,
  .nav-drop > button {
    font-size: 14px;
  }
}

@media (max-width: 960px) {
  .nav-links,
  .nav-cta .btn {
    display: none;
  }

  .nav-toggle {
    display: grid;
    place-items: center;
  }
}