.proyectos-header {
  padding: clamp(3rem, 6vw, 5rem) clamp(1.5rem, 5vw, 4rem) 0;
}
.proyectos-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 300;
  letter-spacing: 0.01em;
  line-height: 1.1;
  margin-top: 0.5rem;
}

/* Filter tabs */
.proyectos-filter {
  display: flex;
  gap: 2rem;
  margin-top: 2.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.filter-btn {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.filter-btn:hover,
.filter-btn.active {
  color: var(--fg);
  border-bottom-color: var(--fg);
}

/* Grid */
.proyectos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
  padding: clamp(2rem, 4vw, 3rem) clamp(1.5rem, 5vw, 4rem) clamp(4rem, 8vw, 7rem);
}

/* Hidden projects */
.project-card.hidden {
  display: none;
}

@media (max-width: 1000px) {
  .proyectos-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 580px) {
  .proyectos-grid { grid-template-columns: 1fr; }
}