/* ============================================
   VTN AGENCY — Portfolio Page Styles
   Hero, Filter Tabs, Project Grid, Hover Effects
   ============================================ */

/* ==================== PORTFOLIO HERO ==================== */
.portfolio-hero {
  min-height: 55vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--dark);
  padding: 140px 40px 60px;
  position: relative;
  overflow: hidden;
}

.portfolio-hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -15%;
  width: 500px;
  height: 500px;
  background: var(--gradient-hero);
  border-radius: 50%;
  opacity: 0.06;
  filter: blur(80px);
  pointer-events: none;
}

.portfolio-hero__content {
  text-align: center;
  max-width: 780px;
  position: relative;
  z-index: 1;
}

.portfolio-hero__title {
  margin-bottom: 20px;
}

.portfolio-hero__subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: rgba(245, 245, 245, 0.75);
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto;
}

/* ==================== FILTER TABS ==================== */
.portfolio-filters {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 24px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(245, 245, 245, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
}

.filter-btn:hover {
  color: var(--light);
  border-color: rgba(255, 255, 255, 0.3);
}

.filter-btn.active {
  background: var(--gradient-btn);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(255, 60, 172, 0.3);
}

/* ==================== PROJECT GRID ==================== */
.portfolio-full-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.portfolio-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--card-bg);
  position: relative;
  transition: transform var(--transition-base), opacity var(--transition-base);
  cursor: pointer;
}

/* Gradient border effect */
.portfolio-item::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  padding: 1px;
  background: var(--gradient-border);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.3;
  transition: opacity var(--transition-base);
  z-index: 2;
}

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

.portfolio-item:hover {
  transform: translateY(-4px);
}

/* Hidden state for filtered items */
.portfolio-item.hidden {
  display: none;
}

/* --- Visual / Image Area --- */
.portfolio-item__visual {
  height: 280px;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
}

.portfolio-item__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-base);
}

.portfolio-item:hover .portfolio-item__visual img {
  transform: scale(1.05);
}

/* --- Hover Overlay --- */
.portfolio-item__overlay {
  position: absolute;
  inset: 0;
  background: rgba(13, 13, 13, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.portfolio-item__link {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  padding: 12px 28px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-pill);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.portfolio-item:hover .portfolio-item__link {
  border-color: var(--primary);
  background: rgba(255, 60, 172, 0.15);
}

/* --- Info Area --- */
.portfolio-item__info {
  padding: 24px;
}

.portfolio-item__info .badge {
  margin-bottom: 12px;
}

/* Badge color variants */
.badge--blue {
  background: rgba(43, 134, 197, 0.15);
  color: var(--accent);
  border-color: rgba(43, 134, 197, 0.3);
}

.badge--green {
  background: rgba(76, 175, 80, 0.15);
  color: #4CAF50;
  border-color: rgba(76, 175, 80, 0.3);
}

.badge--purple {
  background: rgba(120, 75, 160, 0.15);
  color: var(--secondary);
  border-color: rgba(120, 75, 160, 0.3);
}

.portfolio-item__title {
  margin-bottom: 8px;
  font-size: 1.35rem;
}

.portfolio-item__desc {
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
  .portfolio-full-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .portfolio-hero {
    padding: 120px 20px 40px;
    min-height: auto;
  }

  .portfolio-full-grid {
    grid-template-columns: 1fr;
  }

  .portfolio-filters {
    gap: 8px;
  }

  .filter-btn {
    padding: 8px 18px;
    font-size: 0.85rem;
  }

  .portfolio-item__visual {
    height: 220px;
  }
}