.filter-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.filter-btn {
  font-size: 13px;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
  font-family: 'DM Sans', sans-serif;
}
.filter-btn:hover, .filter-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}
.project-card[data-hidden="true"] { display: none; }

.featured-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px;
  margin-bottom: 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: start;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.featured-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.featured-card:hover {
  border-color: var(--border-hover);
  background: var(--surface-hover);
}
.featured-card .fc-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
}
.featured-card h2 {
  font-family: 'Syne', sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.featured-card .fc-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 500px;
  margin-bottom: 20px;
}
.tech-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tech-chip {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.fc-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #0d1117;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.2s;
}
.fc-link:hover { background: #79bbff; }
@media (max-width: 640px) {
  .featured-card { grid-template-columns: 1fr; }
}