/* ==========================================================================
   Navbar — fine, sticky, glass effect
   ========================================================================== */
.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, background 0.2s;
}
.navbar.scrolled {
  border-bottom-color: var(--border);
  background: rgba(255,255,255,0.95);
}
.nav-wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--text-dark);
  letter-spacing: -0.01em;
}
.nav-brand-mark {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  position: relative;
  box-shadow: 0 4px 12px rgba(99,102,241,0.45);
}
.nav-brand-mark::after {
  content: '';
  position: absolute;
  inset: 6px;
  border: 2.2px solid white;
  border-radius: 50%;
  border-bottom-color: transparent;
  border-left-color: transparent;
  transform: rotate(45deg);
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  margin-left: 2rem;
}
.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-light);
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text-dark); }

.nav-spacer { flex: 1; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-link-text {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-light);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}
.nav-link-text:hover { color: var(--text-dark); background: var(--bg-elev); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  align-items: center; justify-content: center;
  color: var(--text-dark);
}
.nav-toggle:hover { background: var(--bg-elev); }
.nav-toggle svg { width: 22px; height: 22px; }

.nav-mobile {
  position: fixed;
  inset: 56px 0 auto 0;
  background: white;
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem 1.5rem;
  transform: translateY(-105%);
  transition: transform 0.25s ease;
  z-index: 99;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.nav-mobile.open { transform: translateY(0); }
.nav-mobile a {
  display: block;
  padding: 0.7rem 0.8rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
  border-radius: var(--radius-sm);
}
.nav-mobile a:hover { background: var(--bg-elev); color: var(--text-dark); }
.nav-mobile .btn { margin-top: 0.5rem; justify-content: center; }

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-actions .nav-link-text,
  .nav-actions .btn-ghost { display: none; }
  .nav-toggle { display: inline-flex; }
}