.projects-filter {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

.filter-btn {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.02em;
}
.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-rust);
  color: var(--color-rust-light);
  background: rgba(192, 68, 10, 0.08);
}

.projects-featured {
  margin-bottom: var(--space-3xl);
}

.featured-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--color-text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.featured-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-divider);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  align-items: stretch;
  gap: var(--space-xl);
}

.project-card-featured {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  min-height: 320px;
  position: relative;
  overflow: hidden;
}
.project-card-featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-rust), var(--color-amber), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}
.project-card-featured:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  transform: translateY(-4px);
}
.project-card-featured:hover::before {
  opacity: 1;
}

.project-card-cat {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-rust);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.project-card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.project-card-desc {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-height: 8.5em;
  overflow-y: auto;
  padding-right: var(--space-xs);
  scrollbar-width: thin;
  scrollbar-color: var(--color-rust-dim) transparent;
}
.project-card-desc::-webkit-scrollbar {
  width: 6px;
}
.project-card-desc::-webkit-scrollbar-track {
  background: transparent;
}
.project-card-desc::-webkit-scrollbar-thumb {
  background-color: var(--color-rust-dim);
  border-radius: var(--radius-full);
}
.project-card-desc:hover::-webkit-scrollbar-thumb {
  background-color: var(--color-rust);
}

.project-card-small .project-card-desc {
  max-height: 6.8em;
}

.project-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: auto;
  padding-top: var(--space-sm);
}

.project-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-divider);
}

.project-card-link {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-rust-light);
  transition: gap var(--transition-fast), color var(--transition-fast);
}
.project-card-link:hover {
  gap: 10px;
  color: var(--color-amber);
}
.project-card-link svg {
  width: 14px;
  height: 14px;
}

.projects-all-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  align-items: stretch;
  gap: var(--space-lg);
}

.project-card-small {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-height: 260px;
}
.project-card-small:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}
.project-card-small .project-card-title {
  font-size: 1rem;
}

.project-hidden {
  display: none;
}

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