/* ─── CASE STUDIES INTRO ─── */
#cs-intro {
  padding: 120px 0 0;
  background: var(--surface);
  position: relative;
}
#cs-intro::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.cs-intro-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: end;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--border);
}
.cs-intro-inner h2 {
  font-family: var(--serif);
  font-size: clamp(2.6rem, 4.5vw, 3.5rem);
  font-weight: 500; line-height: 1.05; letter-spacing: -0.02em;
}
.cs-intro-inner h2 em { color: var(--red); font-style: italic; }
.cs-intro-right p {
  font-size: 1.05rem; line-height: 1.8; color: var(--muted);
  margin-bottom: 20px;
}
.cs-confidential-note {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  background: var(--surface);
  margin-top: 8px;
}
.cs-confidential-note-icon {
  flex-shrink: 0; width: 32px; height: 32px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--gold);
}
.cs-confidential-note p {
  font-size: 0.82rem; line-height: 1.65; color: var(--muted);
  font-style: italic; margin-bottom: 0;
}

/* ─── CASE STUDIES GRID ─── */
#case-grid {
  padding: 80px 0 160px;
  background: var(--surface);
}
.cs-cards {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1px; background: var(--border);
  border: 1px solid var(--border);
}
.cs-card {
  background: var(--bg);
  position: relative; overflow: hidden;
  transition: background 0.35s ease;
  display: flex; flex-direction: column;
}
.cs-card:hover { background: var(--surface); }
.cs-card-img {
  width: 100%; height: 240px; overflow: hidden; position: relative;
}
.cs-card-img img {
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(100%) brightness(0.55) contrast(1.1);
  transition: transform 0.6s ease, filter 0.5s ease;
}
.cs-card:hover .cs-card-img img {
  transform: scale(1.04);
  filter: grayscale(80%) brightness(0.6) contrast(1.15);
}
.cs-card-img-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(8,8,9,0.85) 100%);
}
.cs-card-body {
  padding: 36px 40px 40px;
  display: flex; flex-direction: column; flex: 1;
  position: relative;
}
.cs-card-chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.65rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 20px;
}
.cs-card-chip::before {
  content: ''; display: block; width: 6px; height: 6px;
  border-radius: 50%; background: var(--red); flex-shrink: 0;
}
.cs-card-title {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 2vw, 1.75rem);
  font-weight: 600; line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 14px; color: var(--text);
}
.cs-card-subtitle {
  font-size: 0.9rem; line-height: 1.65; color: var(--muted);
  margin-bottom: 28px;
}
.cs-card-services {
  display: flex; flex-direction: column; gap: 8px;
  margin-bottom: 36px; flex: 1;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.cs-card-service-item {
  display: flex; align-items: center; gap: 12px;
  font-size: 0.78rem; letter-spacing: 0.06em; color: var(--muted);
}
.cs-card-service-item::before {
  content: ''; display: block;
  width: 18px; height: 1px; background: var(--red); flex-shrink: 0;
}
.cs-card-link {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text);
  padding-top: 20px;
  border-top: 1px solid var(--border);
  transition: color 0.25s ease;
}
.cs-card-link svg { transition: transform 0.3s ease; }
.cs-card:hover .cs-card-link { color: var(--red); }
.cs-card:hover .cs-card-link svg { transform: translateX(4px); }
.cs-card-num {
  position: absolute; top: 28px; right: 32px;
  font-family: var(--serif); font-size: 4rem; font-weight: 700;
  color: transparent; -webkit-text-stroke: 1px rgba(255,255,255,0.05);
  line-height: 1; pointer-events: none;
  transition: -webkit-text-stroke-color 0.35s ease;
}
.cs-card:hover .cs-card-num { -webkit-text-stroke-color: rgba(200,33,59,0.12); }

/* ─── TRACK RECORD ─── */
#track-record {
  padding: 160px 0;
  background: var(--bg);
  position: relative;
}
#track-record::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.track-header {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: end;
  margin-bottom: 64px;
}
.track-header h2 {
  font-family: var(--serif);
  font-size: clamp(2.6rem, 4.5vw, 3.5rem);
  font-weight: 500; line-height: 1.05; letter-spacing: -0.02em;
}
.track-header h2 em { color: var(--red); font-style: italic; }
.track-header p { font-size: 1rem; line-height: 1.8; color: var(--muted); }
.track-highlights {
  display: flex; flex-direction: column;
  gap: 1px; background: var(--border);
  border: 1px solid var(--border);
  margin-bottom: 28px;
}
.track-item {
  background: var(--surface);
  padding: 40px 48px;
  display: flex; align-items: flex-start; gap: 40px;
  transition: background 0.3s ease;
}
.track-item:hover { background: var(--surface2); }
.track-idx {
  font-family: var(--serif);
  font-size: 3rem; font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(200,33,59,0.35);
  line-height: 1; flex-shrink: 0;
  width: 64px;
}
.track-text h4 {
  font-family: var(--serif);
  font-size: 1.25rem; font-weight: 600;
  color: var(--text); margin-bottom: 10px; line-height: 1.3;
}
.track-text h4 strong { color: var(--red); font-style: italic; }
.track-text p { font-size: 0.92rem; line-height: 1.7; color: var(--muted); }
.track-chip {
  display: inline-flex;
  font-size: 0.63rem; letter-spacing: 0.16em; text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--border);
  color: var(--red); margin-bottom: 10px;
}
.track-disclaimer {
  padding: 20px 24px;
  border: 1px solid var(--border);
  font-size: 0.8rem; line-height: 1.65; color: var(--muted);
  font-style: italic;
}

/* ─── RUN. ACQUIRE. GROW. ─── */
#rag-band {
  padding: 160px 0;
  background: var(--surface);
  position: relative;
}
#rag-band::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.rag-headline {
  max-width: 860px; margin: 0 auto 80px; text-align: center;
}
.rag-headline blockquote {
  font-family: var(--serif);
  font-size: clamp(1.55rem, 2.8vw, 2.3rem);
  font-weight: 500; line-height: 1.4; color: var(--text); font-style: italic;
}
.rag-headline blockquote em { color: var(--red); font-style: italic; }
.rag-cols {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--border);
  border: 1px solid var(--border);
}
.rag-col {
  background: var(--bg); padding: 52px 44px;
  position: relative; overflow: hidden;
  transition: background 0.35s ease;
}
.rag-col:hover { background: var(--surface2); }
.rag-col-word {
  font-family: var(--serif); font-size: 4rem; font-weight: 700;
  color: transparent; -webkit-text-stroke: 1px rgba(255,255,255,0.08);
  line-height: 1; margin-bottom: 28px;
  transition: -webkit-text-stroke-color 0.35s ease;
}
.rag-col:hover .rag-col-word { -webkit-text-stroke-color: rgba(200,33,59,0.4); }
.rag-col-icon {
  width: 40px; height: 40px; border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--red); margin-bottom: 24px;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.rag-col:hover .rag-col-icon { border-color: var(--red); background: var(--red-glow); }
.rag-col h3 {
  font-family: var(--serif); font-size: 1.35rem; font-weight: 500;
  margin-bottom: 16px; color: var(--text);
}
.rag-col p { font-size: 0.92rem; line-height: 1.75; color: var(--muted); margin-bottom: 24px; }
.rag-col-tag {
  font-size: 0.65rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted); display: block; padding-top: 20px;
  border-top: 1px solid var(--border);
}
.rag-col-img { width: 100%; aspect-ratio: 3/2; overflow: hidden; }
.rag-col-img img {
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(100%) brightness(0.55) contrast(1.2);
  transition: transform 0.6s ease, filter 0.5s ease;
}
.rag-col:hover .rag-col-img img {
  transform: scale(1.05);
  filter: grayscale(70%) brightness(0.65) contrast(1.2);
}

/* ─── CTA ─── */
#cta {
  padding: 160px 0;
  background: var(--bg);
  position: relative; overflow: hidden;
}
#cta::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.cta-bg-text {
  position: absolute; bottom: -40px; right: -20px;
  font-family: var(--serif); font-size: 13vw; font-weight: 700; line-height: 1;
  color: transparent; -webkit-text-stroke: 1px rgba(255,255,255,0.12);
  pointer-events: none; user-select: none; white-space: nowrap;
}
.cta-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; position: relative;
}
.cta-left h2 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 4vw, 4rem);
  font-weight: 500; line-height: 1.08; letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.cta-left h2 em { color: var(--red); font-style: italic; }
.cta-left p { font-size: 1rem; line-height: 1.8; color: var(--muted); }
.cta-right {
  padding-left: 60px; border-left: 1px solid var(--border);
  display: flex; flex-direction: column; justify-content: center; gap: 24px;
}
.contact-item {
  display: flex; align-items: center; gap: 16px;
  padding-bottom: 24px; border-bottom: 1px solid var(--border);
}
.contact-item:last-of-type { border-bottom: none; padding-bottom: 0; }
.contact-item-icon {
  width: 40px; height: 40px; border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--red); flex-shrink: 0;
}
.contact-item-text .label {
  font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 4px;
}
.contact-item-text .value { font-size: 1rem; color: var(--text); }
.cta-actions { display: flex; flex-direction: column; gap: 12px; margin-top: 8px; }

/* ─── Responsive ─── */
@media (max-width: 1100px) {
  #cs-intro, #case-grid, #rag-band, #cta { padding: 120px 0; }
  .track-header { grid-template-columns: 1fr; gap: 32px; }
  #case-grid { padding: 60px 0 120px; }
  .cs-intro-inner { grid-template-columns: 1fr; gap: 40px; }
  .cs-cards { grid-template-columns: 1fr; }
  .rag-headline { margin-bottom: 56px; }
  .rag-cols { grid-template-columns: 1fr; }
  .rag-col { padding: 40px 32px; }
}
@media (max-width: 768px) {
  #cs-intro, #case-grid, #rag-band, #cta, #track-record { padding: 80px 0; }
  #case-grid { padding: 40px 0 80px; }
  .cs-card-body { padding: 28px 28px 32px; }
  .cs-card-img { height: 200px; }
  .track-item { flex-direction: column; padding: 2rem; }
}
@media (max-width: 480px) {
  #cs-intro, #case-grid, #rag-band, #cta { padding: 60px 0; }
  #case-grid { padding: 32px 0 60px; }
  .cs-card-body { padding: 24px 20px 28px; }
  .cs-card-img { height: 180px; }
  .cs-card-title { font-size: 1.3rem; }
  .rag-col { padding: 32px 24px; }
  .rag-col-word { font-size: 3rem; }
}