/* ============================================
   PORTFOLIO
   ============================================ */
.portfolio-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 60px;
  flex-wrap: wrap;
  gap: 24px;
}

.filter-group {
  display: flex;
  gap: 8px;
  padding: 6px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 100px;
}
.filter-btn {
  padding: 10px 20px;
  border: none;
  background: transparent;
  color: var(--text-mute);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.3s;
}
.filter-btn.active {
  background: var(--cyan);
  color: var(--navy);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  grid-auto-rows: 280px;
}
.portfolio-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  transition: all 0.6s var(--ease-out);
  cursor: none;
}
.portfolio-item.wide { grid-column: span 4; }
.portfolio-item.half { grid-column: span 3; }
.portfolio-item.third { grid-column: span 2; grid-row: span 2; }
.portfolio-item.default { grid-column: span 2; }
.portfolio-item.tall { grid-row: span 2; }

.portfolio-visual {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.portfolio-content {
  position: absolute;
  inset: 0;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  z-index: 2;
  background: linear-gradient(to top, rgba(7, 11, 26, 0.95) 0%, rgba(7, 11, 26, 0.7) 40%, transparent 80%);
  transition: all 0.5s;
}
html[data-theme="light"] .portfolio-content {
  background: linear-gradient(to top, rgba(10, 31, 68, 0.9) 0%, rgba(10, 31, 68, 0.5) 40%, transparent 80%);
}

.portfolio-industry {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.portfolio-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #F8FAFC;
  margin-bottom: 10px;
}
.portfolio-desc {
  font-size: 13px;
  color: rgba(248, 250, 252, 0.8);
  margin-bottom: 20px;
  max-width: 400px;
}
.portfolio-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.portfolio-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 4px 10px;
  border-radius: 100px;
  background: rgba(248, 250, 252, 0.1);
  border: 1px solid rgba(248, 250, 252, 0.2);
  color: #F8FAFC;
  letter-spacing: 0.05em;
}

.portfolio-overlay {
  position: absolute;
  top: 20px; right: 20px;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--gold);
  color: var(--navy);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.4s;
}
.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
  transform: translateY(0);
}
.portfolio-overlay svg { width: 12px; height: 12px; }

.portfolio-item:hover { transform: translateY(-6px); border-color: var(--cyan); }
.portfolio-item:hover .portfolio-visual img,
.portfolio-item:hover .portfolio-visual svg { transform: scale(1.1); }

.portfolio-visual img,
.portfolio-visual svg {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transition: transform 0.8s var(--ease-out);
}

@media (max-width: 1200px) {
  .portfolio-grid { grid-template-columns: repeat(4, 1fr); }
  .portfolio-item.wide { grid-column: span 4; }
  .portfolio-item.half { grid-column: span 2; }
  .portfolio-item.third { grid-column: span 2; grid-row: span 1; }
  .portfolio-item.default { grid-column: span 2; }
  .portfolio-item.tall { grid-row: span 1; }
}
@media (max-width: 768px) {
  .portfolio-grid { grid-template-columns: 1fr; grid-auto-rows: 320px; }
  .portfolio-item, .portfolio-item.wide, .portfolio-item.half, .portfolio-item.third, .portfolio-item.default, .portfolio-item.tall {
    grid-column: span 1; grid-row: span 1;
  }
}