/* ============================================================
   portfolio.css — Portfolio 페이지 스타일
   ============================================================ */

.portfolio-header {
  padding-top: 140px;
  padding-bottom: 60px;
  text-align: center;
}

.portfolio-header h1 {
  font-family: var(--font-display);
  font-size: clamp(60px, 10vw, 120px);
  color: var(--cream);
  letter-spacing: 0.05em;
}

/* ── 카테고리 필터 ── */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 0 24px 48px;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 4px;
  text-transform: uppercase;
  padding: 8px 20px;
  border: 1px solid rgba(255,255,255,0.2);
  background: transparent;
  color: rgba(255,255,255,0.5);
  cursor: none;
  transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
}

/* ── 갤러리 그리드 ── */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.portfolio-item {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: #1a1714;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.portfolio-item:hover img {
  transform: scale(1.06);
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: rgba(13,10,8,0.85);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  opacity: 0;
  transition: opacity 0.3s;
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-overlay h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--cream);
  margin-bottom: 6px;
}

.portfolio-overlay span {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--neon-cyan);
}