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

/* Hero stats */
.sp-hero-stats {
  display: flex;
  align-items: center;
  gap: 2rem;
  justify-content: center;
  margin-top: 3rem;
  flex-wrap: wrap;
}
.sph-stat { text-align: center; }
.sph-stat strong { display: block; font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 900; color: #fff; line-height: 1; }
.sph-stat span { display: block; font-size: .82rem; color: rgba(255,255,255,.6); margin-top: .35rem; max-width: 160px; }
.sph-div { width: 1px; height: 48px; background: rgba(255,255,255,.15); }

/* Filter strip */
.cs-filter-strip {
  background: var(--white);
  border-bottom: 1px solid var(--bdrlt);
  position: sticky;
  top: 60px;
  z-index: 90;
}
.cs-filters {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .875rem 0;
  flex-wrap: wrap;
}
.csf-label { font-size: .78rem; font-weight: 600; color: var(--tx3); margin-right: .5rem; white-space: nowrap; }
.csf-btn {
  padding: .4rem .9rem;
  border-radius: 20px;
  border: 1.5px solid var(--bdrlt);
  background: transparent;
  color: var(--tx2);
  font-size: .8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--t);
  white-space: nowrap;
}
.csf-btn:hover { border-color: var(--blue); color: var(--blue); background: rgba(37,99,235,.05); }
.csf-btn.active { background: var(--blue); border-color: var(--blue); color: #fff; }

/* Case studies section */
.cs-section { background: var(--bg); }
.cs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
@media (max-width: 900px) { .cs-grid { grid-template-columns: 1fr; } }

/* Case study card */
.cs-card {
  background: var(--white);
  border: 1.5px solid var(--bdrlt);
  border-radius: var(--r4);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 160ms ease-out, box-shadow 160ms ease-out, border-color 160ms ease-out;
}
.cs-card:hover { transform: translateY(-4px); box-shadow: var(--sh2); border-color: rgba(37,99,235,.2); }
.cs-card[style*="display: none"] { display: none !important; }

/* Card header */
.cs-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem .75rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.cs-industry-tag {
  font-size: .78rem;
  font-weight: 700;
  padding: .3rem .75rem;
  border-radius: 20px;
}
.cs-industry-tag.industrial { background: rgba(234,88,12,.1); color: #c2410c; }
.cs-industry-tag.commercial { background: rgba(37,99,235,.1); color: #1d4ed8; }
.cs-industry-tag.healthcare { background: rgba(220,38,38,.08); color: #b91c1c; }
.cs-industry-tag.municipal { background: rgba(16,185,129,.1); color: #065f46; }
.cs-market-tag { font-size: .75rem; font-weight: 600; color: var(--tx3); }

/* Savings hero */
.cs-savings-hero {
  background: linear-gradient(135deg, var(--blue), #1d4ed8);
  padding: 1.5rem;
  text-align: center;
}
.csh-amount {
  font-family: var(--head);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 900;
  color: #fff;
  line-height: 1;
}
.csh-amount span { font-size: 1.1rem; font-weight: 500; opacity: .75; }
.csh-label { font-size: .8rem; color: rgba(255,255,255,.7); margin-top: .4rem; font-weight: 500; }

/* Card body */
.cs-body { padding: 1.75rem 1.5rem; flex: 1; display: flex; flex-direction: column; gap: 1.25rem; }
.cs-body h2 { font-family: var(--head); font-size: 1.05rem; font-weight: 800; color: var(--tx); line-height: 1.35; margin: 0; }
.cs-body > p.cs-summary { font-size: .875rem; color: var(--tx2); line-height: 1.7; margin: 0; }

.cs-section-label {
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: .5rem;
}
.cs-challenge p, .cs-strategy p { font-size: .875rem; color: var(--tx2); line-height: 1.7; margin: 0; }
.cs-strategy ul { margin: 0; padding-left: 1.25rem; display: flex; flex-direction: column; gap: .4rem; }
.cs-strategy li { font-size: .875rem; color: var(--tx2); line-height: 1.6; }

/* Results grid */
.cs-results-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .75rem;
  background: var(--bg);
  border-radius: var(--r3);
  padding: 1.25rem 1rem;
}
@media (max-width: 600px) { .cs-results-grid { grid-template-columns: repeat(2, 1fr); } }
.cs-result-item { text-align: center; }
.csr-value { font-family: var(--head); font-size: 1.2rem; font-weight: 900; color: var(--tx); line-height: 1; }
.csr-value.green { color: #059669; }
.csr-label { font-size: .7rem; color: var(--tx3); margin-top: .3rem; line-height: 1.4; }

/* Quote */
.cs-quote {
  border-left: 3px solid var(--blue);
  margin: 0;
  padding: .875rem 1rem;
  background: rgba(37,99,235,.04);
  border-radius: 0 var(--r2) var(--r2) 0;
  font-style: italic;
  font-size: .875rem;
  color: var(--tx2);
  line-height: 1.65;
}
.cs-quote cite { display: block; font-style: normal; font-size: .78rem; color: var(--tx3); font-weight: 600; margin-top: .5rem; }

/* Card footer */
.cs-footer {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--bdrlt);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.cs-timeframe { font-size: .78rem; color: var(--tx3); font-weight: 500; }

/* hide filtered cards */
.cs-card.cs-hidden { display: none; }