/* ============================================================
   PORTFOLIO PAGE — Specific Styles
   ============================================================ */

/* ── Filter Bar ──────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
  margin-bottom: var(--sp-12);
  position: relative;
  z-index: 1;
}

.filter-btn {
  padding: 0.55rem 1.2rem;
  border-radius: var(--r-full);
  font-size: var(--fs-sm);
  font-weight: 500;
  border: 1px solid var(--glass-border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--t-base);
}

.filter-btn:hover {
  border-color: var(--glass-border-strong);
  color: var(--text-primary);
  background: rgba(59,130,246,0.06);
}

.filter-btn.active {
  background: rgba(59,130,246,0.14);
  border-color: var(--glass-border-accent);
  color: var(--blue-bright);
  box-shadow: 0 2px 12px rgba(59,130,246,0.15);
}

/* ── Portfolio Grid ──────────────────────────────────────────── */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--sp-6);
  position: relative;
  z-index: 1;
}

.portfolio-item {
  transition: opacity var(--t-base), transform var(--t-base);
}

.portfolio-item.hidden {
  opacity: 0;
  transform: scale(0.92);
  pointer-events: none;
  position: absolute;
}

/* ── Portfolio Thumb Colors ──────────────────────────────────── */
.thumb-web     { background: linear-gradient(145deg, #0F1A2E, #0A0F1C); }
.thumb-ecom    { background: linear-gradient(145deg, #0F1E20, #0A1215); }
.thumb-brand   { background: linear-gradient(145deg, #1A0F1E, #100A12); }
.thumb-saas    { background: linear-gradient(145deg, #1A1A0F, #111008); }
.thumb-mobile  { background: linear-gradient(145deg, #0F1A0F, #0A100A); }
.thumb-auto    { background: linear-gradient(145deg, #1A0F0F, #10080A); }

.thumb-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 52px;
  filter: drop-shadow(0 6px 20px rgba(59,130,246,0.2));
  z-index: 1;
}

.thumb-overlay-bar {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  height: 5px;
  background: linear-gradient(90deg, rgba(59,130,246,0.5), rgba(162,178,200,0.15), transparent);
  border-radius: var(--r-full);
  z-index: 2;
}

/* ── Portfolio CTA ───────────────────────────────────────────── */
.portfolio-cta {
  text-align: center;
  padding: var(--sp-16) var(--sp-12);
  background: linear-gradient(145deg, rgba(30,50,90,0.3) 0%, rgba(23,26,34,0.85) 50%, rgba(20,38,70,0.3) 100%);
  border: 1px solid rgba(59,130,246,0.22);
  border-radius: var(--r-2xl);
  margin-top: var(--sp-16);
  position: relative;
  overflow: hidden;
  box-shadow: 0 12px 48px rgba(59,130,246,0.14), inset 0 1px 0 rgba(96,165,250,0.08), inset 0 -1px 0 rgba(0,0,0,0.3);
}

.portfolio-cta h3 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--sp-4);
  position: relative;
  z-index: 1;
  color: #ffffff;
}

.portfolio-cta p {
  color: rgba(241, 245, 249, 0.85);
  font-size: var(--fs-lg);
  line-height: 1.7;
  margin-bottom: var(--sp-8);
  position: relative;
  z-index: 1;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* Responsive */
@media (max-width: 768px) {
  .portfolio-grid { grid-template-columns: 1fr; }
}