.portfolio-section {
  padding: 4rem 2rem;
  color: var(--text);
}

.portfolio-section .section-title {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--text);
}

/* Tabs */
.portfolio-tabs {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}
.tab-btn {
  flex: 1;
  height: 56px;
  background: var(--border);   /* inactive */
  border: none;
  border-radius: 6px;
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  color: var(--text);
}
.tab-btn.active {
  background: var(--brand);
  color: var(--btn-text);
}

/* Panels */
.portfolio-panels { width: 100%; }
.tab-panel { display: none; }
.tab-panel.active {
  display: block;
  animation: fade 0.3s ease;
}

/* Grid layouts */
.portfolio-grid { display: grid; gap: 1.5rem; }

/* Project tab: 3 → 2 → 1 */
.grid-projects { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1024px) { .grid-projects { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px)  { .grid-projects { grid-template-columns: 1fr; } }

/* Clients & Tech tab: 5 → 3 */
.grid-clients, .grid-tech { grid-template-columns: repeat(5, 1fr); }
@media (max-width: 1024px) { .grid-clients, .grid-tech { grid-template-columns: repeat(3, 1fr); } }

/* Responsive padded grid */
.padded-grid { padding-left: 20rem; padding-right: 20rem; }
@media (max-width: 1200px) { .padded-grid { padding-left: 10rem; padding-right: 10rem; } }
@media (max-width: 1024px) { .padded-grid { padding-left: 5rem;  padding-right: 5rem; } }
@media (max-width: 768px)  { .padded-grid { padding-left: 2rem;  padding-right: 2rem; } }

/* Project cards */
.portfolio-item {
  background: var(--surface);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  color: var(--text);
}
.portfolio-card {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.portfolio-card img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  margin-bottom: 1rem;
}
.portfolio-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--text);
}
.portfolio-card p {
  flex: 1;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  color: var(--text);
  opacity: .9;
}

/* Use global .btn palette for details */
.btn-details {
  align-self: flex-start;
  text-decoration: none;
  border-radius: 4px;
  font-size: 0.85rem;

  /* map to theme tokens */
  background: var(--btn-bg);
  color: var(--btn-text);
  padding: 0.4rem 1rem;
  transition: background-color .2s ease, color .2s ease, transform .2s ease;
}
.btn-details:hover {
  background: var(--btn-hover-bg);
  color: var(--btn-hover-text);
  transform: translateY(-2px);
}

/* Square logo boxes */
.portfolio-square {
  aspect-ratio: 1 / 1;
  background: var(--surface);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 12px rgba(0,0,0,0.05);
  height: 100%;
}
.portfolio-square img {
  width: 50%;
  height: 50%;
  object-fit: contain;
}

/* Animation */
@keyframes fade {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}