/* --- Sektions-Container --- */
.projects-section {
  width: 100%;
  padding: clamp(3rem, 6vw, 6rem) clamp(1.5rem, 4vw, 4rem);
  background-color: var(--bg-main, #f8fafc);
}

/* --- Filter-Leiste --- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 2rem 0;
}

.filter-btn {
  background-color: var(--bg-surface, #ffffff);
  border: 1px solid var(--border-color, #e2e8f0);
  color: var(--text-muted, #475569);
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--primary-color, #0284c7);
  color: #ffffff;
  border-color: var(--primary-color, #0284c7);
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.25);
}

/* --- Das responsive Grid --- */
.projects-grid {
  display: grid;
  /* Mobil: 1 Spalte | Tablet: minmax 280px erzeugt 2 Spalten | Desktop: 3 Spalten */
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

/* Fix auf max 3 Spalten auf großen Desktop-Screens */
@media (min-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --- Card Styling --- */
.project-card {
  background: var(--bg-surface, #ffffff);
  border: 1px solid var(--border-color, #e2e8f0);
  border-radius: var(--radius, 12px);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), 
              box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.2s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
  border-color: #cbd5e1;
}

/* Verstecken gefilterter Karten */
.project-card.is-hidden {
  display: none;
}

.category-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary-color, #0284c7);
  background-color: #f0f9ff;
  padding: 0.25rem 0.75rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}

.project-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main, #1e293b);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.project-card p {
  font-size: 1rem;
  color: var(--text-muted, #475569);
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

/* Card Footer & Link */
.card-footer {
  border-top: 1px solid var(--border-color, #f1f5f9);
  padding-top: 1rem;
  margin-top: auto;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color, #0284c7);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.card-link span {
  transition: transform 0.2s ease;
}

.project-card:hover .card-link span {
  transform: translateX(4px);
}