/* ==========================================================================
   HEADER / NAVIGATION
   ========================================================================== */

.topbar {
  background: var(--ink);
  color: rgba(255,255,255,0.8);
  font-size: var(--fs-xs);
}
.topbar .container {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 8px; padding-bottom: 8px;
  flex-wrap: wrap; gap: var(--sp-3);
}
.topbar a { color: rgba(255,255,255,0.85); }
.topbar a:hover { color: #fff; }
.topbar-left { display: flex; gap: var(--sp-5); flex-wrap: wrap; }
.topbar-item { display: inline-flex; align-items: center; gap: 6px; }
.topbar-item svg { width: 14px; height: 14px; opacity: 0.7; }

.navbar {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(251, 249, 246, 0.96);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
  height: var(--nav-h);
  transition: box-shadow var(--dur-base) var(--ease);
}
.navbar.is-scrolled { box-shadow: var(--shadow-md); }

.nav-inner {
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-5);
}

.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo img { height: 42px; }
.nav-logo-text { font-family: var(--font-display); font-weight: 700; font-size: var(--fs-lg); color: var(--ink); }
.nav-logo-text span { color: var(--orange); }

.nav-links {
  display: flex; align-items: center; gap: var(--sp-6);
  list-style: none; margin: 0; padding: 0;
}
.nav-links > li { position: relative; }
.nav-links > li > a {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--ink);
  padding: var(--sp-3) 0;
  display: inline-flex; align-items: center; gap: 4px;
  position: relative;
}
.nav-links > li > a::after {
  content: '';
  position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--orange);
  transition: width var(--dur-base) var(--ease);
}
.nav-links > li > a:hover::after,
.nav-links > li.is-active > a::after { width: 100%; }
.nav-links > li > a:hover { color: var(--orange-deep); }
.nav-links svg.chev { width: 14px; height: 14px; transition: transform var(--dur-fast); }
.nav-links > li:hover svg.chev { transform: rotate(180deg); }

.nav-dropdown {
  position: absolute;
  top: 100%; left: -16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 290px;
  padding: var(--sp-3);
  opacity: 0; visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--dur-base) var(--ease), transform var(--dur-base) var(--ease), visibility var(--dur-base);
  z-index: 50;
}
.nav-links > li:hover .nav-dropdown,
.nav-links > li:focus-within .nav-dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav-dropdown a {
  display: block;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--ink-soft);
}
.nav-dropdown a:hover { background: var(--orange-pale); color: var(--orange-deep); }
.nav-dropdown-divider { border-top: 1px solid var(--line); margin: var(--sp-2) 0; }
.nav-dropdown-foot {
  display: block;
  padding: 0.65rem 0.85rem;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--blue-deep);
}

.nav-cta { display: flex; align-items: center; gap: var(--sp-3); }

.hamburger {
  display: none;
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--line-strong);
  background: #fff;
  flex-direction: column;
  align-items: center; justify-content: center;
  gap: 4px;
}
.hamburger span {
  width: 20px; height: 2px;
  background: var(--ink);
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 980px) {
  .topbar-left { display: none; }
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h); left: 0; right: 0; bottom: 0;
    background: var(--paper);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--sp-5);
    overflow-y: auto;
  }
  .nav-links.is-open { display: flex; }
  .nav-links > li { width: 100%; border-bottom: 1px solid var(--line); }
  .nav-links > li > a { width: 100%; padding: var(--sp-4) 0; justify-content: space-between; }
  .nav-dropdown {
    position: static;
    opacity: 1; visibility: visible; transform: none;
    display: none;
    box-shadow: none;
    border: none;
    padding: 0 0 var(--sp-3) var(--sp-3);
    min-width: 0;
  }
  .nav-links > li.is-expanded .nav-dropdown { display: block; }
  .hamburger { display: flex; }
  .nav-cta .btn-text { display: none; }
}