/* =========================================
   AMZGO Studio — Portfolio & Case Studies
   ========================================= */

/* =========================================
   FILTER BAR
   ========================================= */
.filter-bar {
  position: sticky;
  top: var(--nav-height);
  z-index: 100;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  padding: 0 5%;
  transition: background var(--transition);
}

.filter-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 4px;
  padding: 12px 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.filter-inner::-webkit-scrollbar { display: none; }

.filter-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 980px;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
  letter-spacing: -0.01em;
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--border);
  background: var(--bg-card);
}

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

/* =========================================
   PORTFOLIO SECTION & GRID
   ========================================= */
.portfolio-section {
  background: var(--bg-secondary);
  padding: 80px 5% 120px;
}

.portfolio-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

/* ---- Portfolio Card ---- */
.pf-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.pf-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

body.light .pf-card:hover {
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

/* ---- Visual Area (CSS art) ---- */
.pf-visual {
  position: relative;
  height: 220px;
  background: linear-gradient(135deg, var(--g1), var(--g2));
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 18px 20px;
  flex-shrink: 0;
}

.pf-label-inside {
  position: relative;
  z-index: 2;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.7);
  background: rgba(0,0,0,0.25);
  padding: 5px 12px;
  border-radius: 980px;
  backdrop-filter: blur(4px);
}

/* CSS shapes for visual interest */
.pf-shape {
  position: absolute;
  opacity: 0.18;
}

.pf-shape-circle {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  top: -60px;
  right: -60px;
}

.pf-shape-ring {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 28px solid rgba(255,255,255,0.8);
  bottom: 10%;
  left: 10%;
  background: transparent;
  opacity: 0.22;
}

.pf-shape-cube {
  width: 140px;
  height: 140px;
  background: rgba(255,255,255,0.15);
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 22px;
  top: 50%;
  right: 8%;
  transform: translateY(-50%) rotate(22deg);
  opacity: 0.5;
}

.pf-shape-grid-art {
  width: 160px;
  height: 160px;
  background-image:
    linear-gradient(rgba(255,255,255,0.25) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.25) 1px, transparent 1px);
  background-size: 24px 24px;
  top: 10%;
  right: 5%;
  border-radius: 12px;
  opacity: 0.6;
}

.pf-shape-storefront {
  width: 120px;
  height: 90px;
  border: 3px solid rgba(255,255,255,0.4);
  border-radius: 10px;
  top: 50%;
  right: 12%;
  transform: translateY(-50%);
  opacity: 0.5;
}

.pf-shape-storefront::before {
  content: '';
  position: absolute;
  top: -22px;
  left: -3px;
  right: -3px;
  height: 20px;
  border: 3px solid rgba(255,255,255,0.4);
  border-radius: 10px 10px 0 0;
}

.pf-shape-motion {
  width: 0;
  height: 0;
  border-top: 55px solid transparent;
  border-bottom: 55px solid transparent;
  border-left: 90px solid rgba(255,255,255,0.3);
  border-radius: 0;
  top: 50%;
  right: 15%;
  transform: translateY(-50%);
  opacity: 0.7;
  background: transparent;
}

.pf-shape-infographic {
  width: 80px;
  height: 80px;
  border-radius: 12px;
  background: rgba(255,255,255,0.2);
  top: 15%;
  right: 10%;
  opacity: 0.6;
}

.pf-shape-infographic::before {
  content: '';
  position: absolute;
  bottom: -30px;
  left: 0;
  width: 80px;
  height: 50px;
  border-radius: 8px;
  background: rgba(255,255,255,0.15);
}

.pf-shape-brand-story {
  width: 100%;
  height: 3px;
  background: rgba(255,255,255,0.3);
  top: 35%;
  left: 0;
  opacity: 0.8;
}

.pf-shape-brand-story::before {
  content: '';
  position: absolute;
  top: 28px;
  width: 70%;
  height: 3px;
  background: rgba(255,255,255,0.2);
}

.pf-shape-brand-story::after {
  content: '';
  position: absolute;
  top: 56px;
  width: 45%;
  height: 3px;
  background: rgba(255,255,255,0.15);
}

/* ---- Card Body ---- */
.pf-info {
  padding: 24px 26px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.pf-cat {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 980px;
  margin-bottom: 14px;
  width: fit-content;
}

.pf-cat.creative { background: rgba(255, 107, 43, 0.12); color: var(--accent); }
.pf-cat.threed   { background: rgba(124, 58, 237, 0.12); color: #a78bfa; }
.pf-cat.aplus    { background: rgba(8, 145, 178, 0.12);  color: #22d3ee; }
.pf-cat.storefront { background: rgba(5, 150, 105, 0.12); color: #34d399; }

body.light .pf-cat.threed   { color: #7c3aed; }
body.light .pf-cat.aplus    { color: #0891b2; }
body.light .pf-cat.storefront { color: #059669; }

.pf-info h3 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  line-height: 1.3;
}

.pf-info p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 20px;
}

.pf-metric {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.metric-num {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

/* Hidden state for filter */
.pf-card.hidden {
  display: none;
}

/* =========================================
   CASE STUDIES — FEATURED
   ========================================= */
.featured-case {
  max-width: 1200px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 60px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition);
}

.featured-case::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255,107,43,0.08), transparent 70%);
  pointer-events: none;
}

body.light .featured-case {
  box-shadow: 0 4px 40px rgba(0,0,0,0.07);
}

.cs-industry-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-glow);
  border: 1px solid rgba(255,107,43,0.2);
  color: var(--accent-2);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 980px;
  margin-bottom: 24px;
  width: fit-content;
}

body.light .cs-industry-badge { color: var(--accent); }

.featured-case-title {
  font-size: clamp(22px, 2.8vw, 34px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.2;
  margin-bottom: 18px;
}

.featured-case-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 32px;
}

.cs-challenge-block,
.cs-approach-block {
  margin-bottom: 28px;
}

.cs-challenge-block h4,
.cs-approach-block h4 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.cs-challenge-block ul,
.cs-approach-block ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cs-challenge-block ul li,
.cs-approach-block ul li {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  padding-left: 18px;
  position: relative;
}

.cs-challenge-block ul li::before {
  content: '✕';
  position: absolute;
  left: 0;
  color: #ef4444;
  font-size: 11px;
  top: 3px;
}

.cs-approach-block ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: #22c55e;
  font-size: 12px;
  top: 2px;
}

.cs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.cs-tag {
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 980px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

/* Featured results */
.featured-case-right {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.featured-results-header {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.featured-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.fm-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 22px 20px;
  transition: border-color var(--transition);
}

.fm-card:hover { border-color: var(--border-hover); }

.fm-num {
  font-size: clamp(18px, 2vw, 26px);
  font-weight: 800;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
  line-height: 1.1;
}

.fm-label {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 3px;
}

.fm-sub {
  font-size: 12px;
  color: var(--text-muted);
}

/* Timeline */
.timeline-bar {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 24px 20px;
}

.tl-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.tl-steps {
  display: flex;
  align-items: center;
  gap: 0;
}

.tl-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  gap: 8px;
}

.tl-step span {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-primary);
}

.tl-step small {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

.tl-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--border);
  border: 2px solid var(--text-muted);
  transition: background var(--transition);
}

.tl-dot.accent {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(255,107,43,0.5);
}

.tl-step.done .tl-dot {
  background: rgba(255,107,43,0.3);
  border-color: var(--accent);
}

.tl-line {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), rgba(255,107,43,0.3));
  margin-bottom: 30px;
  min-width: 20px;
}

/* =========================================
   CASE STUDIES GRID
   ========================================= */
.cs-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.cs-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.cs-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-5px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.25);
}

body.light .cs-card:hover {
  box-shadow: 0 16px 48px rgba(0,0,0,0.1);
}

.cs-card-header {
  padding: 28px 28px 20px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  position: relative;
  min-height: 90px;
}

.cs-card-cat {
  font-size: 13px;
  font-weight: 700;
  color: rgba(255,255,255,0.9);
}

.cs-card-icon {
  font-size: 28px;
  opacity: 0.8;
}

.cs-card-body {
  padding: 24px 28px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.cs-card-body h3 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  line-height: 1.35;
}

.cs-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.cs-card-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.cs-metric {
  text-align: center;
}

.cs-metric strong {
  display: block;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 3px;
  line-height: 1.2;
}

.cs-metric span {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.4;
}

.cs-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.cs-card-tags span {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 980px;
  background: var(--accent-glow);
  border: 1px solid rgba(255,107,43,0.15);
  color: var(--accent-2);
}

body.light .cs-card-tags span {
  color: var(--accent);
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 1024px) {
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .cs-grid { grid-template-columns: repeat(2, 1fr); }
  .featured-case { grid-template-columns: 1fr; gap: 48px; padding: 40px; }
}

@media (max-width: 768px) {
  .portfolio-grid { grid-template-columns: 1fr; }
  .cs-grid { grid-template-columns: 1fr; }
  .featured-case { padding: 28px; }
  .featured-metrics { grid-template-columns: 1fr 1fr; }
  .cs-card-metrics { grid-template-columns: repeat(3, 1fr); }
  .tl-step small { display: none; }
}

@media (max-width: 480px) {
  .featured-metrics { grid-template-columns: 1fr; }
  .cs-card-metrics { grid-template-columns: 1fr; }
  .tl-steps { flex-wrap: wrap; gap: 12px; }
  .tl-line { display: none; }
}