.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 14px 20px;
  background: rgba(255,255,255,.7);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(0,0,0,.05);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand { font-weight: 700; text-decoration: none; color: inherit; letter-spacing: .03em; }

.nav-links a {
  text-decoration: none;
  color: inherit;
  opacity: .8;
  margin-left: 16px;
}
.nav-links a[aria-current="page"] { opacity: 1; border-bottom: 2px solid rgba(0,0,0,.2); padding-bottom: 2px; }
.nav-links a:hover { opacity: 1; }

.nav-toggle {
  display: none;
  border: 1px solid rgba(0,0,0,.15);
  background: rgba(255,255,255,.85);
  border-radius: 12px;
  width: 44px;
  height: 40px;
  font-size: 20px;
  cursor: pointer;
}

.nav-panel {
  position: fixed;
  inset: 0;
  background: #ffffff;
  padding: 84px 20px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transform: translateY(-100%);
  transition: transform .18s ease-out;
  z-index: 9998;
}
.nav-panel.open { transform: translateY(0); }
.nav-panel a { display: block; font-size: 1.1rem; color: #111; text-decoration: none; padding: 12px 10px; border-radius: 10px; }
.nav-panel a[aria-current="page"] { background: rgba(0,0,0,.06); }

.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.15);
  opacity: 0;
  transition: opacity .18s ease-out;
  z-index: 9997;
}
.nav-backdrop.open { opacity: 1; }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-grid; place-items: center; }
}