/* ===========================
   CASE STUDIES PAGE STYLES
   =========================== */

.cs-hero {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 4rem 0 3rem;
  text-align: center;
}
.cs-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-white);
  margin: 0.75rem 0 1rem;
}
.cs-hero p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.8);
  max-width: 580px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}
.cs-hero__filters {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}
.cs-filter {
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  border: 1.5px solid rgba(255,255,255,0.3);
  background: transparent;
  color: rgba(255,255,255,0.8);
  transition: all 0.2s;
}
.cs-filter:hover { border-color: rgba(255,255,255,0.7); color: var(--color-white); }
.cs-filter--active {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-white);
}

/* Main grid */
.cs-main {
  padding: 5rem 0;
  background: var(--color-surface);
}
.cs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

/* Card */
.cs-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: var(--transition-base);
}
.cs-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-3px);
  border-color: var(--color-primary);
}
.cs-card__top {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.cs-card__sector {
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.cs-card__service {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.cs-card__service--tax { background: rgba(240,184,12,0.12); color: #9a7208; }
.cs-card__service--audit { background: rgba(25,39,129,0.1); color: var(--color-primary); }
.cs-card__service--advisory { background: rgba(16,185,129,0.1); color: #065f46; }
.cs-card__service--compliance { background: rgba(239,68,68,0.1); color: #991b1b; }

.cs-card h3 {
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--color-text);
}

.cs-card__challenge,
.cs-card__outcome {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--color-border);
}
.cs-card__outcome { border-left-color: var(--color-primary); }
.cs-card__challenge > span,
.cs-card__outcome > span {
  display: block;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}
.cs-card__outcome > span { color: var(--color-primary); }
.cs-card__challenge p,
.cs-card__outcome p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin: 0;
}

/* Results strip */
.cs-card__results {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.cs-result { flex: 1; text-align: center; }
.cs-result strong {
  display: block;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
}
.cs-result span {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Footer */
.cs-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.cs-card__client {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-style: italic;
}
.cs-card__link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}
.cs-card__link:hover { color: var(--color-gold); }

/* CTA */
.cs-cta {
  background: var(--color-primary);
  padding: 5rem 0;
  color: var(--color-white);
}
.cs-cta__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.cs-cta__text h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  color: var(--color-white);
  margin-bottom: 1rem;
}
.cs-cta__text p {
  color: rgba(255,255,255,0.8);
  line-height: 1.75;
  margin-bottom: 1.5rem;
  font-size: 1rem;
}
.cs-cta__trust {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.cs-cta__trust li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.85);
}
.cs-cta__trust svg {
  width: 16px; height: 16px;
  stroke: var(--color-gold);
  flex-shrink: 0;
}
.cs-cta__actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.cs-cta__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.cs-cta__stat {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  text-align: center;
}
.cs-cta__stat strong {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-gold);
  line-height: 1.1;
  margin-bottom: 0.35rem;
}
.cs-cta__stat span {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.7);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Responsive */
@media (max-width: 900px) {
  .cs-grid { grid-template-columns: 1fr; }
  .cs-cta__inner { grid-template-columns: 1fr; gap: 2.5rem; }
}
@media (max-width: 500px) {
  .cs-cta__stats { grid-template-columns: 1fr 1fr; }
  .cs-card__results { flex-wrap: wrap; }
}