.projects-grid { grid-template-columns: repeat(3, 1fr); }

.confidential-notice {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  max-width: 720px;
  margin: 0 auto 2.5rem;
  padding: 0.8rem 1.2rem;
  border-radius: 12px;
  background: var(--grad-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.5;
}
.confidential-notice svg { flex-shrink: 0; color: var(--accent); }

.filter-bar {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.filter-btn:hover { color: var(--text); border-color: var(--accent); }
.filter-btn.active { background: var(--grad); color: #fff; border-color: transparent; }

@media (max-width: 980px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .projects-grid { grid-template-columns: 1fr; }
}