/* ============================================================
   SKYLINE STUDIO — PORTFOLIO PAGE STYLES
   File: css/portfolio.css
   Used by: portfolio.html only
   ============================================================ */

/* Portfolio Filters */
.portfolio-filters {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
  padding: 0 clamp(20px, 5vw, 80px);
}

.filter-btn {
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: transparent;
  color: var(--silver);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.filter-btn:hover {
  border-color: var(--cobalt);
  color: var(--cobalt);
}

.filter-btn.active {
  background: var(--cobalt);
  color: #fff;
  border-color: var(--cobalt);
}

/* Portfolio Grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
  margin-bottom: 60px;
}

.portfolio-card {
  background: var(--navy-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
}

.portfolio-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 64px rgba(43, 107, 255, 0.25);
  border-color: var(--cobalt);
}

.portfolio-image {
  position: relative;
  width: 100%;
  height: 240px;
  overflow: hidden;
  background: var(--navy-mid);
}

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

.portfolio-card:hover .portfolio-image img {
  transform: scale(1.05);
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: rgba(43, 107, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}

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

.view-btn {
  color: #fff;
  font-weight: 600;
  font-size: 15px;
}

.portfolio-info {
  padding: 24px;
}

.portfolio-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.portfolio-desc {
  font-size: 14px;
  color: var(--silver-dim);
  line-height: 1.6;
  margin-bottom: 16px;
}

.portfolio-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  display: inline-flex;
  background: rgba(43, 107, 255, 0.15);
  border: 1px solid rgba(43, 107, 255, 0.3);
  border-radius: 20px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--cobalt-light);
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, rgba(43, 107, 255, 0.1), rgba(167, 139, 250, 0.05));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
}

.cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 32px;
}

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

  .portfolio-filters {
    margin-bottom: 40px;
  }

  .portfolio-image {
    height: 200px;
  }

  .cta-buttons {
    flex-direction: column;
    gap: 12px;
  }

  .cta-buttons .btn {
    width: 100%;
    justify-content: center;
  }
}

/* Animation classes */
.fade-up {
  animation: fadeUp 0.6s ease-out forwards;
  opacity: 0;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.portfolio-card:nth-child(1) { animation-delay: 0.1s; }
.portfolio-card:nth-child(2) { animation-delay: 0.2s; }
.portfolio-card:nth-child(3) { animation-delay: 0.3s; }
.portfolio-card:nth-child(4) { animation-delay: 0.4s; }
.portfolio-card:nth-child(5) { animation-delay: 0.5s; }
.portfolio-card:nth-child(6) { animation-delay: 0.6s; }

/* ── DETAILED INTRO & RESULTS ── */
.portfolio-intro {
  max-width: 860px;
  margin: 0 auto 48px;
}
.portfolio-intro p {
  font-size: 16px; color: var(--silver); line-height: 1.85; margin-bottom: 22px;
}
.portfolio-intro p:last-child { margin-bottom: 0; }
.portfolio-results-content { max-width: 860px; }
.portfolio-results-content p {
  font-size: 16px; color: var(--silver); line-height: 1.85; margin-bottom: 22px;
}
.portfolio-results-content p:last-child { margin-bottom: 0; }
@media (max-width: 768px) {
  .portfolio-intro p, .portfolio-results-content p { font-size: 15px; line-height: 1.75; }
  .portfolio-intro { margin-bottom: 36px; }
}