/* ==========================================================================
   Header / Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  gap: var(--space-4);
}

.brand { display: flex; align-items: center; gap: var(--space-2); }
.brand img { height: 52px; width: auto; }
.brand__text { line-height: 1.15; }
.brand__name { font-family: var(--font-heading); font-weight: 700; font-size: 1.25rem; color: var(--color-primary); }

.main-nav__list { display: flex; align-items: center; gap: var(--space-5); }
.main-nav__list a {
  font-weight: 600;
  font-size: var(--fs-sm);
  color: var(--color-text);
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--transition);
}
.main-nav__list a:hover,
.main-nav__list a.is-active { color: var(--color-secondary); }
.main-nav__list a.is-active::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 2px;
  background: var(--color-secondary);
  border-radius: var(--radius-pill);
}

.has-dropdown { position: relative; display: flex; align-items: center; gap: var(--space-2); }
.nav-dropdown-toggle {
  display: none; align-items: center; justify-content: center;
  width: 26px; height: 26px;
  background: none; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  cursor: pointer; color: var(--color-text);
}
.nav-dropdown-toggle svg { transition: transform var(--transition); }
.nav-dropdown {
  list-style: none; margin: 0; padding: var(--space-2);
  position: absolute; top: 100%; left: 0;
  background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
  min-width: 200px;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}
.nav-dropdown li { list-style: none; }
.nav-dropdown a { display: block; padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); font-weight: 600; font-size: var(--fs-sm); color: var(--color-text); white-space: nowrap; }
.nav-dropdown a:hover { background: var(--color-bg-alt); color: var(--color-secondary-dark); }
.has-dropdown:hover .nav-dropdown,
.has-dropdown:focus-within .nav-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span { width: 26px; height: 2px; background: var(--color-primary); border-radius: 2px; transition: var(--transition); }

@media (max-width: 960px) {
  .main-nav { position: fixed; top: 0; right: -100%; height: 100vh; width: min(320px, 85vw);
    background: #fff; box-shadow: var(--shadow-lg); padding: var(--space-7) var(--space-5);
    transition: right var(--transition); z-index: 110; overflow-y: auto; }
  .main-nav.is-open { right: 0; }
  .main-nav__list { flex-direction: column; align-items: flex-start; gap: var(--space-4); }
  .nav-toggle { display: flex; position: relative; z-index: 111; }
  .nav-backdrop { display: none; position: fixed; inset: 0; background: rgba(13,21,51,0.5); z-index: 105; }
  .nav-backdrop.is-open { display: block; }

  .has-dropdown { flex-direction: row; flex-wrap: wrap; align-items: center; width: 100%; }
  .nav-dropdown-toggle { display: flex; }
  .has-dropdown.is-open .nav-dropdown-toggle svg { transform: rotate(180deg); }
  .nav-dropdown {
    position: static; opacity: 1; visibility: visible; transform: none; transition: none;
    box-shadow: none; background: none; padding: 0; min-width: 0; width: 100%;
    display: none;
  }
  .has-dropdown.is-open .nav-dropdown {
    display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-3);
    margin-top: var(--space-3);
  }
  .nav-dropdown a { padding: 0; border-radius: 0; }
  .nav-dropdown a:hover { background: none; }
}