/* ============================================================
   portfolio.css — Portfolio grid + expandable case study panels
   ============================================================ */

/* ── Grid section ── */
.pf-grid-section {
  padding: 4rem 4rem 5rem;
  background: var(--bg);
}
.pf-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* ── Card ── */
.pf-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s, transform 0.35s var(--ease), box-shadow 0.35s;
}
.pf-card:hover {
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(0,0,0,0.35);
}
.pf-card--soon { opacity: 0.5; }
.pf-card--soon:hover { transform: none; box-shadow: none; }

/* ── Card image area ── */
.pf-card-img {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Real image — shown when uploaded */
.pf-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  transition: transform 0.5s var(--ease);
}
.pf-card:hover .pf-card-img img { transform: scale(1.04); }

/* Placeholder shown when no image */
.pf-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
}
.pf-placeholder-icon { font-size: 2.8rem; filter: drop-shadow(0 0 16px rgba(0,212,255,0.2)); }
.pf-placeholder-label {
  font-family: var(--font-btn);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white-muted);
}

/* Grid overlay texture */
.pf-card-img::before {
  content: '';
  position: absolute; inset: 0; z-index: 1;
  background-image:
    linear-gradient(rgba(0,212,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

/* Type badge — top right */
.pf-card-overlay {
  position: absolute;
  top: 0.8rem; right: 0.8rem;
  z-index: 2;
}
.pf-card-type {
  font-family: var(--font-btn);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #081428;
  background: rgba(245,200,66,0.12);
  border: 1px solid rgba(245,200,66,0.3);
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
}

/* Gradient fade at bottom of image */
.pf-card-img::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 60px;
  background: linear-gradient(to top, var(--bg-card), transparent);
  z-index: 2;
  pointer-events: none;
}

/* Thumb gradients for placeholders */
.pf-thumb-1 { background: linear-gradient(135deg, #0a1428 0%, #1a0820 100%); }
.pf-thumb-2 { background: linear-gradient(135deg, #0a1a1a 0%, #081428 100%); }
.pf-thumb-3 { background: linear-gradient(135deg, #0a1a10 0%, #0a1428 100%); }
.pf-thumb-4 { background: linear-gradient(135deg, #1a100a 0%, #0a1428 100%); }
.pf-thumb-5 { background: linear-gradient(135deg, #0a0a1a 0%, #1a0a14 100%); }
.pf-thumb-6 { background: linear-gradient(135deg, #141428 0%, #0a1414 100%); }

/* ── Card body ── */
.pf-card-body {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}
.pf-card-num {
  font-family: var(--font-btn);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gold);
}
.pf-card-title {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.3;
}
.pf-card-desc {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--white-dim);
  line-height: 1.65;
  flex: 1;
}
.pf-card-result {
  font-family: var(--font-btn);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--white-dim);
  border-top: 1px solid var(--border);
  padding-top: 0.7rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.pf-card-result--muted { color: var(--white-muted); }
.pf-dot { color: var(--gold); font-size: 0.45rem; }

/* Card CTA button */
.pf-card-btn {
  width: 100%;
  padding: 0.75rem;
  background: transparent;
  border: 1.5px solid rgba(0,212,255,0.25);
  border-radius: 6px;
  color: var(--accent);
  font-family: var(--font-btn);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.3s, border-color 0.3s, color 0.3s;
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
.pf-card-btn:hover {
  background: rgba(0,212,255,0.07);
  border-color: var(--accent);
}
.pf-card-btn.active {
  background: rgba(0,212,255,0.1);
  border-color: var(--accent);
  color: var(--accent-soft);
}
.pf-card-btn--disabled {
  opacity: 0.35;
  cursor: not-allowed;
  border-color: var(--border);
  color: var(--white-muted);
}
.pf-btn-arrow { font-size: 0.85rem; }

/* ── Case Study Panels ── */
.cs-panel {
  display: none;
  background: var(--bg-2);
  border-top: 2px solid var(--gold);
  border-bottom: 1px solid var(--border);
}
.cs-panel.open {
  display: block;
  animation: panelSlide 0.4s var(--ease) forwards;
}
@keyframes panelSlide {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.cs-panel-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 4rem 4rem;
  position: relative;
}
.cs-panel-close {
  position: absolute;
  top: 2rem; right: 4rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--white-dim);
  font-family: var(--font-btn);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  transition: border-color 0.3s, color 0.3s;
}
.cs-panel-close:hover { border-color: var(--accent); color: var(--accent); }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .pf-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .pf-grid-section { padding: 2.5rem 1.2rem 3rem; }
  .pf-grid { grid-template-columns: 1fr; gap: 1.2rem; }
  .cs-panel-inner { padding: 2rem 1.2rem 3rem; }
  .cs-panel-close { top: 1.2rem; right: 1.2rem; }
}
@media (max-width: 480px) {
  .pf-grid-section { padding: 2rem 1rem 2.5rem; }
  .pf-card-body { padding: 1.1rem; }
  .pf-card-title { font-size: 0.92rem; }
}