/* ===== Header / Navigation (light corporate design language) ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: #fff;
  box-shadow: var(--shadow-subtle);
  z-index: 100;
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled {
  box-shadow: 0 4px 16px rgba(27, 42, 56, 0.12);
  border-bottom: 1px solid rgba(199, 154, 62, 0.15);
}
body { padding-top: var(--header-height); }

.header-inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  white-space: nowrap;
  min-width: 0;
  flex-shrink: 1;
  overflow: hidden;
}
.brand img { width: 42px; height: 25px; flex-shrink: 0; }
.brand .brand-name {
  font-size: 1.0625rem;
  line-height: 1.2;
  color: var(--heading);
  font-weight: 700;
}
.brand .brand-name small {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-cta { flex-shrink: 0; }
@media (max-width: 640px) {
  .nav-cta { display: none; }
  .brand .brand-name { font-size: 0.9375rem; }
  .brand img { width: 38px; height: 22px; }
}

/* Desktop nav */
.main-nav ul { display: flex; align-items: center; gap: 0.25rem; }
.main-nav a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius);
  transition: color 0.15s ease, background 0.15s ease;
}
.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-soft);
}

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown > a::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 0.625rem;
  margin-left: 0.35rem;
}
.dropdown-menu {
  position: absolute;
  top: calc(100% + 0.4rem);
  right: 0;
  min-width: 280px;
  background: #fff;
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 0.5rem;
  box-shadow: 0 10px 34px rgba(27, 42, 56, 0.16);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 95;
}
.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu,
.nav-dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.dropdown-menu li { list-style: none; }
.dropdown-menu ul,
.dropdown-menu {
  display: block !important;
}
.dropdown-menu a {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 0.875rem;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
  line-height: 1.4;
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease;
}
.dropdown-menu a i {
  width: 1.375rem;
  height: 1.375rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 5px;
  flex-shrink: 0;
}
.dropdown-menu a:hover,
.dropdown-menu a[aria-current="page"] {
  color: var(--heading);
  background: var(--bg-surface);
}
.dropdown-menu a[aria-current="page"] { font-weight: 600; }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0.625rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  position: relative;
  z-index: 101;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--heading);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 960px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    inset: 0;
    padding-top: calc(var(--header-height) + 1rem);
    background: rgba(255, 255, 255, 0.99);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
    z-index: 90;
  }
  .main-nav.open { transform: none; }
  .main-nav ul { flex-direction: column !important; align-items: stretch; gap: 0.25rem; padding: 1.5rem; }
  .main-nav > ul > li > a { font-size: 1.0625rem; padding: 0.9375rem 1rem; border-bottom: 1px solid var(--border); border-radius: 0; }
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: transparent;
    display: none;
    padding: 0 0 0 1rem;
  }
  .nav-dropdown.open .dropdown-menu { display: block; }
  .nav-dropdown > a::after { content: "\f067"; float: right; color: var(--accent); }
  .nav-dropdown.open > a::after { content: "\f068"; }
}