.shell-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 28px;
  height: 56px;
  border-bottom: 1px solid var(--forest-border);
  background: var(--forest);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
  transition: transform .28s ease, box-shadow .28s ease;
  will-change: transform;
}
/* Hover-to-reveal when hidden (public pages use CSS-only peek) */
.shell-nav.hidden {
  transform: translateY(calc(-100% + 6px));
  box-shadow: 0 1px 6px rgba(0,0,0,0.2);
}
.shell-nav.hidden:hover {
  transform: translateY(0);
  box-shadow: 0 2px 12px rgba(0,0,0,0.25);
}
.shell-nav::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--lime) 0%, transparent 100%);
  opacity: 0;
  transition: opacity .2s ease;
}
.shell-nav.hidden::after { opacity: 1; }

/* ── Logo elevation: brand sits slightly higher than nav items ── */
.shell-nav > .topbar-logo,
.shell-nav > a:first-child {
  margin-top: -3px;
}

.shell-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.shell-nav-links a {
  text-decoration: none;
  color: var(--forest-muted);
  font-size: 0.9rem;
  padding: 6px 10px;
  border-radius: 6px;
  transition: var(--transition);
}

.shell-nav-links a:hover,
.shell-nav-links a[aria-current="page"] {
  color: var(--forest-text);
  background: var(--forest-hover);
}

.shell-section {
  max-width: 1140px;
  margin: 0 auto;
  padding: 32px 28px 72px;
}

.shell-footer {
  border-top: 1px solid var(--forest-border);
  background: var(--forest);
  box-shadow: 0 -2px 12px rgba(0,0,0,0.2);
}

.shell-footer-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 24px 28px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--forest-muted);
  font-size: 0.85rem;
}

.shell-footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.shell-footer-links a {
  color: var(--forest-muted);
  text-decoration: none;
  transition: var(--transition);
}

.shell-footer-links a:hover {
  color: var(--forest-text);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.9fr 0.7fr;
  gap: 15px;
  align-items: stretch;
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

@media (max-width: 920px) {
  .hero-grid,
  .stack-grid {
    grid-template-columns: 1fr;
  }

  .shell-nav {
    padding: 16px 18px;
  }

  .shell-section {
    padding: 24px 18px 56px;
  }

  .shell-footer-inner {
    padding: 20px 18px 28px;
    align-items: flex-start;
  }
}

/* User chip positioning context on public pages */
.landing-nav-actions {
  position: relative;
  display: flex;
  gap: 12px;
  align-items: center;
}

/* Chip on public pages — matches .user-chip-wrap positioning */
.landing-nav-actions .user-chip-wrap {
  position: relative;
  flex-shrink: 0;
}

/* ── Public shell nav grouped dropdowns ──────────────────────── */
.shell-nav-link {
  text-decoration: none;
  color: var(--forest-muted);
  font-size: 0.9rem;
  transition: var(--transition);
  white-space: nowrap;
}
.shell-nav-link:hover,
.shell-nav-link[aria-current="page"] { color: var(--forest-text); }

.shell-drop-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.shell-drop-wrap::after {
  content: '';
  position: absolute;
  top: 100%; left: 0; right: 0;
  height: 12px;
}
.shell-drop-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: transparent;
  border: none;
  font-family: inherit;
  cursor: pointer;
  padding: 0;
  color: var(--forest-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}
.shell-drop-btn:hover,
.shell-drop-wrap.open > .shell-drop-btn { color: var(--forest-text); }
.shell-drop-btn.active { color: var(--lime); }
.shell-drop-btn svg:last-child { transition: transform .17s ease; }
.shell-drop-wrap.open > .shell-drop-btn svg:last-child { transform: rotate(180deg); }

.shell-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  min-width: 190px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 6px;
  z-index: 200;
  display: none;
  flex-direction: column;
  opacity: 0;
  transition: opacity .15s ease, transform .15s ease;
}
.shell-drop-wrap.open .shell-dropdown {
  display: flex;
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.shell-dd-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 7px;
  text-decoration: none;
  font-size: .85rem;
  color: var(--text-muted);
  transition: var(--transition);
  white-space: nowrap;
}
.shell-dd-item svg { flex-shrink: 0; opacity: .7; }
.shell-dd-item[href]:hover { background: var(--surface2); color: var(--text); }
.shell-dd-item[href]:hover svg { opacity: 1; }
.shell-dd-soon {
  opacity: .38;
  cursor: default;
  font-size: .78rem;
  pointer-events: none;
}
*.req {
  color: red;
}