/* ==========================================================================
   Navbar
   ========================================================================== */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 247, 250, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}
.navbar.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
  background: rgba(246, 247, 250, 0.96);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: 1.05rem;
}

.navbar__logo { display: inline-flex; align-items: center; flex-shrink: 0; }

.navbar__nav { display: none; }

.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}
.navbar__links a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--color-navy);
  position: relative;
  padding-block: 0.3rem;
}
.navbar__links a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -2px;
  height: 2px;
  background: var(--color-blue);
  transition: right var(--dur-fast) var(--ease);
}
.navbar__links a:hover::after,
.navbar__links a[aria-current="page"]::after {
  right: 0;
}
.navbar__links a[aria-current="page"] { color: var(--color-blue); }

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

.navbar__cta { display: none; }

/* Hamburger */
.navbar__toggle {
  width: 40px;
  height: 40px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius-sm);
}
.navbar__toggle span {
  width: 20px;
  height: 2px;
  background: var(--color-navy);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast) var(--ease);
}
.navbar__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.navbar__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile panel */
.navbar__mobile {
  max-height: 0;
  overflow: hidden;
  border-top: 1px solid transparent;
  transition: max-height var(--dur) var(--ease), border-color var(--dur) var(--ease);
  background: var(--color-surface);
}
.navbar__mobile.is-open {
  max-height: 420px;
  border-top-color: var(--color-border);
}
.navbar__mobile-links {
  padding: var(--space-4) var(--container-pad) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.navbar__mobile-links a {
  display: block;
  padding: 0.75rem 0;
  font-size: 1.05rem;
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
}
.navbar__mobile-links a[aria-current="page"] { color: var(--color-blue); }
.navbar__mobile .btn { margin: var(--space-4) var(--container-pad); width: calc(100% - 2 * var(--container-pad)); }

@media (min-width: 900px) {
  .navbar__nav { display: block; }
  .navbar__cta { display: inline-flex; }
  .navbar__toggle { display: none; }
  .navbar__mobile { display: none; }
}