.filter-bar {
  display: flex; gap: 10px; justify-content: center; flex-wrap: wrap;
  margin-bottom: 48px;
}
.filter-btn {
  padding: 8px 18px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 100px;
  font-family: inherit; font-size: 13px; font-weight: 600;
  color: var(--ink-2); cursor: pointer;
  transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--line-2); color: var(--ink); }
.filter-btn.active { background: var(--accent); color: var(--bg); border-color: var(--accent); }

.portfolio-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
@media (max-width: 900px) { .portfolio-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .portfolio-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; } }

.case {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-lg); overflow: hidden;
  cursor: pointer;
  transition: all 0.3s var(--ease-smooth);
  display: flex; flex-direction: column;
  text-decoration: none; color: inherit;
}
.case:hover {
  transform: translateY(-6px); border-color: var(--line-2);
  box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.5);
}
.case:hover .case-image img { transform: scale(1.06); }
.case.hidden { display: none; }

.case-image {
  aspect-ratio: 16 / 10; position: relative; overflow: hidden;
}
.case-image img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s var(--ease-smooth);
}
.case-image::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(18, 12, 34, 0.6) 100%);
  pointer-events: none;
}
.case-tag {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  padding: 4px 10px;
  background: rgba(18, 12, 34, 0.8); backdrop-filter: blur(10px);
  border: 1px solid var(--line-2); border-radius: 100px;
  font-size: 11px; font-weight: 600; color: var(--ink);
}
.case-year {
  position: absolute; top: 14px; right: 14px; z-index: 2;
  padding: 4px 10px;
  background: rgba(34, 198, 230, 0.15); backdrop-filter: blur(10px);
  border: 1px solid rgba(34, 198, 230, 0.3);
  border-radius: 100px;
  font-size: 11px; font-weight: 600; color: var(--accent);
}

.case-body { padding: 24px; flex: 1; }
.case-metric {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 600; color: var(--accent);
  margin-bottom: 10px;
  padding: 4px 10px;
  background: rgba(34, 198, 230, 0.08); border-radius: 100px;
}
.case-title {
  font-size: 22px; font-weight: 700;
  letter-spacing: -0.02em; margin-bottom: 8px;
}
.case-location {
  font-size: 13px; color: var(--ink-3); margin-bottom: 14px;
  display: flex; align-items: center; gap: 6px;
}
.case-desc { font-size: 14px; color: var(--ink-2); line-height: 1.5; margin-bottom: 4px; }
.case-desc-en { font-size: 12px; color: var(--ink-3); line-height: 1.5; }

.case-footer {
  padding: 16px 24px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: var(--ink-3);
}
.case-footer .view-link {
  color: var(--accent); font-weight: 600;
  display: flex; align-items: center; gap: 6px;
  transition: gap 0.2s;
}
.case:hover .view-link { gap: 10px; }

/* Stats */
.stats-bar {
  background: var(--bg-2); border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 60px 0;
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
  max-width: 900px; margin: 0 auto;
}
@media (max-width: 700px) { .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; } }
.stat { text-align: center; }
.stat-num {
  font-size: 30px; font-weight: 700;
  letter-spacing: -0.025em; color: var(--accent);
  line-height: 1.1; margin-bottom: 8px;
}
.stat-label { font-size: 13px; color: var(--ink-2); font-weight: 500; }

/* Final CTA */
.final-cta { padding: 120px 0; text-align: center; position: relative; overflow: hidden; }
.final-cta::before {
  content: ""; position: absolute;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 800px; height: 400px;
  background: radial-gradient(ellipse, rgba(34, 198, 230, 0.15) 0%, transparent 60%);
  pointer-events: none;
}
.final-content { position: relative; z-index: 1; max-width: 720px; margin: 0 auto; }
.final-title {
  font-size: clamp(28px, 5.5vw, 56px);
  font-weight: 700; letter-spacing: -0.025em; line-height: 1.1;
  margin-bottom: 20px;
  overflow-wrap: break-word;
}
.final-title .accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.final-sub { font-size: 17px; color: var(--ink-2); max-width: 520px; margin: 0 auto 14px; }
.final-sub-en { font-size: 14px; color: var(--ink-3); margin-bottom: 40px; }
.final-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }